There is a need for enterprises to incorporate information on the environment into decision making and to take action on ecological restoration. Within academia, a comprehensive understanding of the impacts on how business can serve sustainability transformation is still lacking as diverging holistic approaches and reductive approaches cloud academic thinking. The authors take a science-policy interface perspective to cover the role of cognitive proximity, matching and coordination of scientific knowledge from diverse stakeholders for effective policy making and implementation. We (...) show through a literature review that temporal and spatial scales, soil and land degradation, institutions and ecosystem, and the role of human behavior and narrative are not adequately emphasized in sustainability research. A scale-based picture, focusing on landscapes, institutions and practices is proposed which can be used to align diverse fields by acting as “bridge” for improved science policy interface and decision making, facilitated through cognitive proximity, matching, and coordination. A case study on a business association from South India is used to demonstrate the scales based approach in practice. A scale-based approach can play a key role in connecting human behaviour, a social science thematic topic, with ecosystems, a natural science thematic topic. (shrink)

This comprehensive article explores the multifaceted business value derived from adopting cloud computing solutions. It examines the economic impacts, operational efficiencies, and strategic advantages associated with cloud adoption, particularly focusing on the key areas of capital expenditures (CapEx), operational expenditures (OpEx), DevOps automation, and the fintech industry. Through detailed analysis, simulations, and case studies, the article aims to provide a robust understanding of how cloud technologies are transforming business landscapes and driving innovation.

Using incoming revenues and the associated costs that underpin the concept of breakeven analysis, this article investigates the business survival strategies of immigrant-own-businesses in the context of African immigrants in the Cape Town Metropolitan Area of South Africa, and proposes a framework for the start-up survival of these businesses. The study was designed within the quantitative and qualitative research paradigms. A triangulation of three methods was utilised to collect and analyze the data. The research revealed that African immigrant entrepreneurs (...) face a range of challenges when starting their businesses and again as they try to grow or stay afloat. Furthermore, the study indicated that African immigrants rely more on certain entrepreneurial attributes as they seek innovative solutions to the problems that they encounter relating to business. As a business survival strategy, these immigrants develop a number of unconventional initiatives aimed at increasing sales revenue while minimising cost. (shrink)

In today’s rapidly evolving financial landscape, the adoption of Artificial Intelligence (AI) and Machine Learning (ML) technologies, coupled with the deployment of Business Rules Management Systems (BRMS), has transformed how financial transactions are conducted, monitored, and secured. With fraud, particularly in check deposit transactions, becoming increasingly sophisticated, financial institutions are turning to AI and ML to enhance their risk management strategies. This paper explores the integration of AI-driven models and business rules in financial transactions, focusing on their application (...) in fraud detection and prevention. We also examine the associated challenges, such as data privacy, ethical concerns, and the need for regulatory frameworks, while outlining the opportunities that lie ahead for future financial innovation. (shrink)

This study investigates all available literature related to critical thinking in business education in a survey of publications in the field produced from 1990-2019. It conducts a thematic analysis of 787 articles found in Web of Science and Google Scholar, including a specific focus on 55 highly-cited articles. The aim is to investigate the importance of critical thinking in business education, how it is conceptualised in business education research, the business contexts in which critical thinking is (...) situated, and the key and more marginal themes related to critical thinking outlined in the business and business education literature. The paper outlines six key areas and topics associated with those areas. It suggests future directions for further scholarly work in the area of critical thinking in business education. (shrink)

In four experiments, we offer evidence that virtues are often judged as uniquely important for some business practices (e.g., hospital management and medical error investigation). Overall, actions done only from virtue (either by organizations or individuals) were judged to feel better, to be more praiseworthy, to be more morally right, and to be associated with more trustworthy leadership and greater personal life satisfaction compared to actions done only to produce the best consequences or to follow the correct moral rule. (...) These results accord with claims made by some virtue ethicists. The current data contribute to a small but growing body of literature emphasizing both empirical soundness and philosophical rigor in the scientific study of virtue. Results also offer some guidance concerning how businesses, employees, and executives are evaluated and perceived. Implications for theory and practice are discussed. (shrink)

This article solves the problem of ensuring database decision-making in conditions of growing uncertainty and risks based on the results of business diagnostics is solved in this article. The main purpose of the research is to further develop the methodology of forming an analytical database for making management decisions. The following methods formed the methodological basis of the research: abstract-logical – used to generalize theoretical approaches and confirm the practical significance of solving the problem of decision-making in conditions of (...) uncertainty and risk; system analysis – when building a model of decision-making while coordinating areas and methods of business diagnostics; generalization – when drawing conclusions based on research results. The results of solving the problem of decision-making by improving the methodological approach in selecting areas and methods of business diagnostics in the conditions of growing uncertainty and risks are given in the article. The results of the research have practical value for companies that seek to reduce uncertainty and risk in the decision-making process in business management. (shrink)

In light of the diversity of hybrid, social, and faith-based enterprises, the paper aims to deepen and widen the descriptive and normative reach of the theory of the firm. Higher ends of business are core philosophical components for an expanded normative theory of the firm. To regard shareholders, managers, and all stakeholders of a business firm in a fully moral light means expanding one’s view of such roles beyond merely economic and legal conceptions to encompass their full humanity (...) and associated moral obligations and social responsibilities. Any adequate normative theory of the firm will cast business participants not just as economic actors and as legal agents but as flesh-and-blood moral persons with ethical responsibilities. When the theory of the firm is normativized – not privileging moral rights and obligations of stockholders or stakeholders in advance of consideration of balance of reasons -- the false dichotomy of shareholder primacy versus stakeholder primacy falls away, ceasing to provide a basis for giving categorically incompatible accounts of prima facie moral obligations of business participants. (shrink)

While immigrants are at liberty to start self-help financial associations (referred to as stokvels in South Africa) to cater for their unfufilled need for capital, the benefits of this laudable effort are seldom maximised due to a number of shortcomings. Aim: This paper seeks to ascertain the operational obstacles that immigrant-run stokvels face and to suggest solutions accordingly. Method: Aiming to complement each other, quantitative and qualitative research approaches were utilised to conduct this study. Quantitative and qualitative data were collected (...) through a self-administered questionnaire and one-on-one in-depth interviews. Purposive sampling technique was employed to reach the 123 participants who responded to the survey questionnaire and the 10 that took part in oneon-one in-depth interviews. Results: The typical immigrant African entrepreneur who participates in a stokvel, is a married male between ages of 30 and 46, and is fairly educated. While most of the respondents conceded that their stokvels faced operational problems, they also noted that the default on loan repayment and unskilled personnel on the loan management team were the issues of a greater concern. Hence, providing training and practical management skills becomes paramount to the smooth functioning of these stokvels. Uniqueness and implications: Though presumed to be a possible source of finance for immigrant-owned businesses, most studies have not explored the operational challenges that stokvels in South Africa face. The lessons drawn from this study may be of benefit to the respondents, policy-makers and academics. (shrink)

This article summarizes the question of finding effective solutions to ensure the excellence of modern business through the introduction of managerial innovations. The main purpose of the study is to improve the theoretical and methodological approach to the implementation of managerial innovations in the system of modern business solutions. Systematization of literature sources and approaches to solving the problem of improving business management through the introduction of managerial innovations indicates the widespread use of methodological approaches and methods (...) of managerial innovation, but much management issues to ensure business excellence, justification of new opportunities for its development remain unnoticed. The urgency of solving this scientific problem is that in conditions of growing uncertainty and risk, accelerating the transformation of business, the importance of ensuring its perfection in the long term economic development of Ukraine is growing. The methodological tools of research methods were a system of methods used to obtain the final results of the study: generalization and comparative analysis – to clarify the essence of the concept of «managerial innovation»; abstract-logical – to reveal the relationship between the use of information and communication technologies, business excellence and implementation of management innovations; system-analytical – in developing a model of business excellence based on the use of modern information and communication technologies. The object of research is the industrial enterprises of the modern economy of Ukraine, because they are the basis of economic formation, a source of replenishment of the country budget and form the export orientation of business. The article presents the results of abstract-logical analysis of the blocks of business excellence, which showed that at the present stage of its development, the introduction of managerial innovations should be associated with the digital transformation of business. The results of the system-analytical analysis are presented, which are the basis for the development of an economic model for business excellence. The results of the study can be useful for business structures (and in particular, business units of the industrial complex of Ukraine), which seek to increase the efficiency of decision-making in today's digital business transformation. (shrink)

Drawing a sample of 135 successful African immigrant-owned businesses, this paper sets out to investigate how their owners acquired the necessary capital for start-up and growth thereafter. The paper was designed within the quantitative and qualitative research paradigms, in which a triangulation of three methods was utilised to collect and analyze the data. The paper revealed that although African immigrants are characteristically at a disadvantage when it comes to accessing capital from formal financial institutions, this does not stop them from (...) pursuing entrepreneurial activities. At the start-up stage, they typically resort to personal savings, business credit, family credit, and loans from informal financial institutions. According to the ability to raise capital, we found that a varying range of start-up capital was utilised, which tended to vary across the different ethnic groups studied. Once started, we found that the sources of additional finance available to these immigrants did not change significantly. They conventionally turned to friends, co-ethnics and self-help financial associations to ‘feed’ their need for further funding. (shrink)

The article provides the analysis of the entrance into the innovative activity and organized regulation of interaction which is based on the scientific and technological changes, concentration of production and the feasibility study of administrative decisions, which are dominated by a conglomerate of technical, technological and engineering management decisions. The research formulates the provisions for the productive use of business as the form of economic relations which is based on the entrepreneur function. These provisions are formulated basing on the (...) conditions of efficient division of labour and cooperation. The research singles out a number of systemic positions which allow perceiving logically and distinguishing the production, service and business, to distribute human activities between the groups of occupations and types of service activities. Among these systemic provisions the most efficient is a modelling approach which, when the society enters more complex social and economic stage, transfers the science from the environment of operations with the bulk characteristics into the environment of the analysis of specific sets of coefficients. The logistics of Ukraine’s joining the process of business is associated with the position of the recognition of the primacy of the physical abilities of the person, which should be developed in part in the system of public security and partly in the business environment, commercialization and private capital. Person enters the business environment and habitat as an initiative individual. These indicators are the following: «connections» between the old and the new, between the objects which exist and those which only start to appear and will exist in future; «sources» of development, movement, changes; «mechanism» of development, ways of changing from old to new quality; «direction» of development; «style» of thinking, understanding reality; «essence» of true knowledge; «essence itself» of cognition; «alternativeness» of metaphysics and dialectics. (shrink)

The journalistic device of applying military imagery to describe business strategies is appropriate insofar as businesses implicitly base their strategies on a military model whose origins lie in Social Darwinism. What this involves is an unexamined understanding that any means may be adopted to achieve corporate objectives. Recent workforce reductions are manifestations of this understanding; but so are practices associated with mergers and acquisitions and with government-effectuated takings. Regulation, rather than being overbroad, cannot contain these corporate excesses; and social (...) pressure is an underdeveloped counterforce. Business ethics will remain futile, unfortunately, so long as its practitioners assume a peacetime state of affairs and businesses assume a state of war. (shrink)

Circular economy (CE), a sustainability concept that promotes resource efficiency and waste re-duction, has garnered significant popularity in recent years due to its potential to address pressing environmental and economic challenges. This study develops the Bayesian Mindsponge Mindspongeconomics (BMM) framework/analytic method based on Bayesian Mindsponge framework (BMF) to the factors influencing young adults' pro-environmental behavior and purchases of green products at different price levels. The findings indicate that young adults who are knowledgeable about CE and value environmental protection and energy (...) conservation are more likely to engage in waste sorting, while the factors that affect their willingness to pay (WTP) more for green and en-ergy-saving products vary at different price tiers. The study demonstrates that CE knowledge, daily waste sorting habits, and environmental concern positively impact young adults' WTP for products that are 5%, 10%, and 15% higher-priced, respectively. Besides, the study also highlights the po-tential of educational programs and cultural influences in nurturing a generation that prioritizes environmental value. The research integrates multidisciplinary perspectives and offers practical implications for policymakers, educators, and businesses seeking to promote green literacy and foster an environmental culture among the youth, contributing to the broader goals of green transformation and sustainable development associated with CE and green economy, especially in urban areas of emerging countries and beyond. (shrink)

Although immigrants have been found to be particularly likely to engage in entrepreneurial activities in their host countries, very often their ability to do so is restricted by a range of challenges, including having limited access to finances. As a consequence, proactive immigrant entrepreneurs establish informal financial associations, which are known as stokvels in South Africa, in order to compensate for the general lack of available capital for their business ventures. Accordingly, this paper has sought to ascertain the role, (...) which stokvels play in the startups and the growth of Cameroonian-owned businesses, and also the strategies which they employ. A mixed-methods approach was adopted to conduct the study and purposive sampling was employed to obtain a research sample of 123 participants to respond to the survey questionnaire and 10 to take part in one-on-one in-depth interviews. The data was analysed through the use of the Statistical Package for Social Sciences (SPSS) software, which generated findings in the form of descriptive statistics. The results suggest that most emerging immigrant entrepreneurs struggle to obtain sufficient startup capital. It also emerged from the findings that stokvels played an equally significant role in providing the capital, which was necessary for the growth of their businesses. On the basis of the assumption that widening access to finance would improve both the startups and the growth of immigrant-owned businesses, the authors of this paper advocate for inclusive policy initiatives, which consider the unique characteristics of the immigrant entrepreneur. In addition, it is hoped that this paper will make a valid contribution to the discourse concerning inclusive finance and be of interest to policymakers and academics. (shrink)

The sometimes, selective exclusion by the legislation and the financial houses of the host country, force immigrants of African origin to setup stokvels to sustain their businesses and livelihood in South Africa. Aim: To provide the basis for inclusive policy initiatives, this paper investigated the drivers for the formation of business support stokvels by Cameroonians in South Africa. Method: The paper adopted a mix research paradigm with the survey questionnaire and personal interviews as the tools of choice. The purposive (...) sampling technique was implored to reach the 132 respondents. Results: It was apparent that the participants form stokvels to compensate for the lack of access to finance from formal financial intermediaries. The dire need for startup and later expansion capital drove them to form stokvels and even to belong to multiple stokvels as they strive to improve their chances. Beyond this, stokvels provide the platform for the mobilization of savings and the opportunity to run their own bank on their own terms. Implications: while aligned to the Cameroonian community, other minority groups can draw vital lessons. Beyond this, the paper informs the inclusive finance debate and may therefore be relevant to policy makers and academics. (shrink)

Many previous studies evaluated factors influencing entrepreneurial intention including psychological factors, social economic factors, family circumstance, etc. In contrast, there are very few studies examine the relationship between entrepreneurial competencies and entrepreneurial intention. Thus, this paper aim to identify the list of competencies that impact entrepreneurial intention among Southeast Asian students who influenced by Confucianism. The conceptual model was established based on the list of previous studies in this field with a sample size of 1000 students who study in University (...) of Economics-The University of Danang. The main finding indicated that (i) from eleven independent variables listed from previous studies, only six independent variables remain; (ii) there are no evidences to prove that risk management and tenacity/ perseverance were associated with entrepreneurship intention. These results have important values in developing entrepreneurship training programs to promote students' entrepreneurial intention among Southeast Asian Countries. (shrink)

We discuss the crucial, but easily missed, link between paternalism and incarceration. Legal paternalists believe law should be used to help individuals stay healthy or moral or become healthier or morally better. Criminal laws are paternalistic if they make it illegal to perform some action that would be bad for the actor to do, regardless of effects on others. Yet, one result of such laws is the punishment, including incarceration, of the very same actors—also clearly bad for them even if (...) meant to be rehabilitative. Therein lies an oddity: paternalist criminal law—and thepresumably rehabilitativepunishments that serve as responses to infringements of such laws—is meant to help the actor but in fact has the opposite effect on net. Incarceration is particularly problematic on this front as it harms the alleged criminal in ways that go beyond the harm they would have caused themselves. Incarceration also may undermine the actor’s ability to improve his decision-making abilities or his moral character. The effects of the punishment also drift to others—family and friends, as well as business associates, of the punished. Paternalists, inasmuch as they are motivated by beneficence or concern about moral character, must account for all of these costs as threats to well-being and the conditions for acting morally. Given the link between paternalism and incarceration, we propose that if we are to take seriously the problem of over-incarceration in the U.S., we must reconsider the use of paternalism in criminal law; we sketch several alternatives. We believe paternalists should support our resistance to incarceration and seriously consider these alternatives. (shrink)

In this paper we propose an Ontology of Commercial Exchange (OCE) based on Basic Formal Ontology. OCE is designed for re-use in the Industrial Ontologies Foundry (IOF) and in other ontologies addressing different aspects of human social behavior involving purchasing, selling, marketing, and so forth. We first evaluate some of the design patterns used in the Financial Industry Business Ontology (FIBO) and Product Types Ontology (PTO). We then propose terms and definitions that we believe will improve the representation of (...) contractual obligations, sales processes, and their associated documents. A commercial exchange, for instance, involves mutual agreement to reciprocate actions, such as transferring money, performing a service, or transferring goods. (shrink)

Economists associated with the Austrian School of Economics are known to deny the value of macroeconomics as descended from the work of John Maynard Keynes and, especially, his followers. Yet, Austrian economists regularly engage in a related scientific activity: theorizing about the causes and consequences of economic fluctuations, i.e., the business cycle. What explains the Austrians’ willingness to engage in theorizing about the business cycle while denying the scientific import of macroeconomics? The present paper argues that the methodological (...) precepts of the School, which have remained largely in place since Carl Menger first pronounced them at the start of the Methodenstreit, justify the kind of business-cycle theorizing that Austrians do and imply the limited scientific value of macroeconomics as descended from Keynes. (shrink)

Most businesses are aware of the costs associated with sexual harassment and are concerned about limiting its presence in the workplace. Although the business ethics literature contains work on sexual harassment, it has very little to say on chastity or its value in the workplace, even though unchaste behavior underlies the prevalence of sexual harassment. This article begins this investigation into chastity worth having in the workplace, taking typical company policies as a guide for what kind of chastity is (...) worth having in the workplace in particular. The first question asked in this article is: for what reasons is chastity worth having in the workplace? I consider four answers—harm prevention, respect for employee consent/dissent, respect for others’ dignity, and conflict of interest avoidance—and I examine workplace policies that enforce chaste behavior in search for a unified and underlying reason for these policies. In the process of locating the primary reason for the value of being chaste in the workplace in particular, we will be given tools to develop an account of chastity worth having in the workplace, which I will argue is primarily cognitive, rather than volitional or affective. I conclude that chastity is the disposition not to construe a coworker as a satisfier of one’s sexual interest, and I argue that chastity is valuable in the workplace because it secures coworkers’ ability to have their contributions appropriately valued. The hope is that once the reason and locus of chastity is identified, the professionals who know how to train businesspeople in developing virtues will better be able to focus their attention and efforts. (shrink)

I argue that capitalism presents a threat to “democratic contestation”: the egalitarian, socially distributed capacity to affect how, why, and whether power is used. Markets are not susceptible to mechanisms of accountability, nor are they bearers of intentions in the way that political power-holders are. This makes them resistant to the kind of rational, intentional oversight that constitutes one of democracy’s social virtues. I identify four social costs associated with this problem: the vulnerability of citizens to arbitrary interference, the insensitivity (...) of markets to relevant interests, failures of trust in the market system, and the inhibition of social deliberation about matters of public concern. I make general two suggestions about how we might ameliorate these problems: First, as a way of introducing some measure of intentionality to large-scale patterns of business activity, the reconceptualization of such activity as participation in larger group actions; second, the development of deliberative bodies that bring together business actors, policy experts, and diverse citizens in an effort to better characterize and transmit the public values that business should serve. (shrink)

The claim is made in the book, Applied Ethics, published under the auspices of the Australian Association for Professional and Applied Ethics (AAPAE), that it can strengthen ethical behaviour. That claim, embodied in the subtitle, is based on more than a half dozen practices set out in the book. In total, they are drawn from an examination of ethical practices across fourteen different disciplines. The purpose of this paper is to outline and support that claim, drawing primarily on chapters (...) of the book, but also drawing on a small amount of additional information. The research on the ethical issues in each of these disciplines, and the writing of the chapters, were undertaken by members and associates of AAPAE. The fourteen disciplines were Marketing, Business, Accounting, Pharmacy, Nursing, Medicine, Veterinary & Animal Ethics, Engineering, Information and Communications Technology (ICT), Journalism, Policing, Politics, the Law and the Sciences. The findings have significance for the teaching of ethics by moral philosophers, for not all ethics classes follow the practices suggested by these findings. A few of the practices are even rejected by some moral philosophers. That the practices will improve ethical behaviour is the principal position taken by this paper. -/- . (shrink)

In medical ethics, business ethics, and some branches of political philosophy (multi-culturalism, issues of just allocation, and equitable distribution) the literature increasingly combines insights from ethics and the social sciences. Some authors in medical ethics even speak of a new phase in the history of ethics, hailing "empirical ethics" as a logical next step in the development of practical ethics after the turn to "applied ethics." The name empirical ethics is ill-chosen because of its associations with "descriptive ethics." Unlike (...) descriptive ethics, however, empirical ethics aims to be both descriptive and normative. The first question on which I focus is what kind of empirical research is used by empirical ethics and for which purposes. I argue that the ultimate aim of all empirical ethics is to improve the context-sensitivity of ethics. The second question is whether empirical ethics is essentially connected with specific positions in meta-ethics. I show that in some kinds of meta-ethical theories, which I categorize as broad contextualist theories, there is an intrinsic need for connecting normative ethics with empirical social research. But context-sensitivity is a goal that can be aimed for from any meta-ethical position. (shrink)

"... These breakfast bowls of credit and the associated vehicles that enable the creation of business interests, guide governmental regulation, and provide the basis for the interpretation and explanation of business strategy and government policy, simultaneously depend on and are underscored by consumer indebtedness which they (categories 1 and 2) themselves have formed and managed, and from whose obligations and restrictions they remain remarkably and disproportionately aloof...".

In spite of the concerted drive by most countries towards gender equality, the reality is that women still remain underutilised in certain spheres of professional endeavours, and entrepreneurship is no exception. Widening the gap between female and male participation in entrepreneurial activities is reinforced by customs, beliefs, culture and religion. Using the patriarchal perceptions that dissuade women from pursuing a business opportunity as the backdrop, this study sought to ascertain how it feels to be a woman entrepreneur in a (...) male-dominated society such as Rwanda. The study involved 398 women entrepreneurs who were purposely drawn to complete the survey questionnaire that was the basis of the quantitative approach adopted. The data was analysed using the Statistical Package for the Social Sciences(SPSS) software. The results suggest that women entrepreneurs worked lesser than men due to family issues; female-owned businesses are smaller in size than male businesses, and women find it difficult reaching the decision to start a business. The implication is that women's businesses suffer most and thus limiting their ability to contribute to the socio-economic development of a country as they would through employment and poverty reduction. By working together, government and stakeholders may eradicate any form of discrimination in business that is associated with gender. (shrink)

Public discussions of ethical issues related to the biotechnology industry tend to treat "biotechnology" as a single, undifferentiated technology. Similarly, the pros and cons associated with this entire sector tend to get lumped together, such that individuals and groups often situate themselves as either "pro-" or "anti-" biotechnology as a whole. But different biotechnologies and their particular application context pose very different challenges for ethical corporate decision-making. Even within a single product category, different specialty products can pose strikingly different ethical (...) challenges. In this paper, we focus on the single over-arching category of "genetic testing" and compare tests for disease susceptibility and drug response. We highlight the diversity of ethical challenges - grouped under the broad categories of "truth in advertising" and "protecting intellectual property" - raised by the commercialization and marketing of these technologies. By examining social and technical differences between genetic tests, and the associated corporate ethics challenges posed by their commercialization, our intent is to contribute to the nascent business ethics literature examining issues raised by the development and marketing of genetic tests. (shrink)

Despite the many advantages that mobile money o ers to Small and Medium-sized Enterprises (SMEs) relative to traditional banking services, the majority of stakeholders of this platform have not yet maximised its use owing to several concerns not limited to trust, awareness, and even cost. To examine the factors justifying the adoption and usage of Mobile Money Services (MMS) among SMEs, the types of Mobile Money Services used by these SMEs, and the interdependences between these variables, this study adopted an (...) exploratory approach. The researchers elected to use a mixed-method approach, which necessitated the usage of a survey questionnaire and structured in-depth interviews. Representatives of 12 SMEs were interviewed during the qualitative phase to corroborate the 285 SMEs surveyed in the quantitative part of the study. Descriptive and inferential statistics were adopted to analyse the quantitative data using the Statistical Packages for Social Sciences version 26 (SPSS version 26). The researchers described the qualitative data according to themes, and the findings were combined after that. While no single factor was accountable, it emerged that accessibility, safety, and convenience were the main factors that entice SMEs in Douala, Cameroon to embrace mobile money services in the effort to receive money from clientele, pay suppliers, and purchase airtime for additional transactions (most preferred mobile money services). Furthermore, it was found that there was a statistically significant association between most of the motivating factors cited and the most preferred mobile money services used by SMEs in Douala. These findings validate the role that mobile money plays in promoting the inclusive finance agenda for SMEs, mainly in the context of emerging economies where the majority of people and businesses do not have access to banking services and therefore may be of interest to policymakers and different stakeholders. Furthermore, an identification of the types of mobile money services businesspersons mostly use in Douala, a business hub, may help to develop businesses by directing the stakeholders to agenda items of interest in the context of Cameroon. (shrink)

Aim: Underscoring the xenophobic violence that has befallen African immigrants in South Africa in the recent past is the perception held in certain quarters that African immigrants take away entrepreneurial opportunities among others from the Natives. This paper sought to determine how African immigrant entrepreneurs identify business opportunities in South Africa in tandem with what South African entrepreneurs could learn from African immigrants. -/- Method: The paper was based on quantitative data from 220 participants collected by way of a (...) semi-structured questionnaire. As such, the study benefited from the qualitative insights associated with the use open-ended questions in the questionnaire. The data was analyzed using version 24 of the Statistical Package for Social Sciences (SPSS) software. -/- Results: suggest that African immigrants uncover entrepreneurial opportunities through: startup partners, previous employment, families, through ethnic networks, prior knowledge of the market need, prior knowledge of how to serve the market and prior knowledge of the challenges serving the market. Value/Contribution: this study is premised on the fact that no previous study has attempted to investigate how immigrants identify business opportunities, in tandem with what South African entrepreneurs could learn from African immigrants. -/- Implications: Considering the close parallel between African immigrants and the indigenous black South Africans, it is to be hoped that the study would be of interest to the latter in particular, policy makers and academics in general. (shrink)

The world is on the cusp of an epoch known as the Fourth Industrial Revolution (4IR). Despite the much-publicised promise of enhanced productivity, flexibility, efficiency and improved quality, Industry 4.0 is a daunting prospect for less-developed nations without the human labour to cope with and embrace the anticipated technological advancement. The paper explores the various opportunities and challenges associated with entrepreneurship in the Fourth Industrial Revolution in developing countries to ascertain their readiness. An in-depth, systematic literature review was conducted. In (...) doing that, we were mindful of the coverage, and data collection was carried out through a rigorous process to ensure the accuracy of findings while keeping the study’s objective. This paper argues for entrepreneurs to rethink and initiate the development of strategies that would make them relevant in the future, through innovation of business models, in preparation for possible disruptions with the evolution of Industry 4.0, while also advocating that more should be done to address the causes of policy and institutional failures. (shrink)

Studying the psychology behind the purchase of eco-friendly products and second-hand items can offer valuable insights to promote sustainable consumer behavior. This paper examines factors influencing Italian consumers’ willingness to pay regarding bio-based clothing and second-hand items. Drawing from data collected from 402 Italian participants, we examine how motivations and socio-demographic factors are associated with willingness to pay in the context of sustainable fashion. Our findings reveal that motivations related to environmental concerns are positively associated with consumers’ willingness to pay (...) higher premiums for bio-based clothing. Higher income and education levels are also associated with the willingness to pay higher premiums. Meanwhile, motivation related to vintage appeal is associated with lower desired discounts for second-hand items, particularly among older consumers. Gender differences also influence discount preferences, with men seeking larger discounts on second-hand clothing compared to women. By providing insights into Italian consumers’ sustainable fashion choices, this study offers implications for businesses, policymakers, and researchers aiming to promote eco-conscious consumption and sustainability in the fashion industry. (shrink)

Research groups around the world are currently busy trying to invent new life in the laboratory, looking for extraterrestrial life, or making machines increasingly more life-like. In the case of astrobiology, any newly discovered life would likely be very old, but when discovered it would be new to us. In the case of synthetic organic life or life-like machines, humans will have invented life that did not exist before. Together, these endeavors amount to what we call the emerging plurality of (...) lives because we see a future where we are surrounded by, and interact with, life of many different origins, as well as entities that we have not traditionally seen as being alive. In the future these entities will likely possess properties that we so far have only associated with living beings, thereby transcending and perhaps blurring the borders between life and non-life. (shrink)

Sales forecasting plays a pivotal role in business planning, helping organizations predict future sales trends based on historical data. Traditional forecasting methods, such as moving averages and linear regression, often lack the flexibility and precision required to account for complex patterns in sales data. Predictive analytics, which leverages advanced machine learning techniques, offers a more robust and dynamic approach for forecasting sales. This paper explores the implementation of sales forecasting using predictive analytics, focusing on the application of machine learning (...) algorithms like decision trees, random forests, and time series models. By analyzing historical sales data and identifying key influencing factors such as seasonality, promotions, and economic indicators, predictive models can provide more accurate forecasts, enabling businesses to optimize inventory, staffing, and marketing strategies. This paper highlights key methodologies, benefits, and challenges associated with predictive sales forecasting and presents case studies demonstrating its impact in real-world applications. (shrink)

In recent years, “Information Ethics” (IE) has come to mean different things to different researchers working in a variety of disciplines, including computer ethics, business ethics, medical ethics, computer science, the philosophy of information, social epistemology and library and information science. Using an ontocentric approach, this paper seeks to define the parameters of IE and thereby increase our understanding of the moral challenges associated with Information Communication Technologies.

In this article, we engage with a theory of management advanced by MacIntyrean scholars of business ethics and organization studies to develop an account of “chronic moral injury” in the workplace. In contrast to what we call “acute moral injury,” which focuses on grave, traumatic events, chronic moral injury results from poor institutional form—when an individual desiring excellence must function within a vicious institution that impedes the acquisition of virtues and marginalizes practices. In other words, chronic moral injury occurs (...) when practitioners who pursue excellence in their practice work within corrupt or malformed organizations. To demonstrate this point, we recount the events associated with the rise and fall of the biotech company, Theranos. This case study advances an empirical contribution to MacIntyrean studies by demonstrating how chronic moral injury can happen under such conditions and what the negative consequences may entail for workers. (shrink)

Background: School meal programs are not only government initiatives but also community-driven efforts. Aiming to combat food insecurity among school-aged children effectively, these programs are executed in conjunction with food bank initiatives. Various community groups play a crucial role in the success of both food security initiatives. There is a need to improve community engagement to successfully link school meal programs with food banks to build program synergy, combating food insecurity through a two-sided approach. Aim: This study aims to examine (...) community engagement in school meals program by analyzing its purposeful focus on creating jobs and income-generating opportunities for different community groups, i.e., youths, women, and others. Methods: The Bayesian Mindsponge Framework, combining the reasoning strengths of Mindsponge theory and inference advantages of Bayesian analysis, was employed on a dataset of 126 government representatives who manage large-scale school meal programs in 126 different countries. Results: Findings showed that the school meals program’s purposeful focus on creating jobs and income-generating opportunities for women in the community was positively associated with community engagement, thereby supporting the linkage between the programs and food banks. In contrast, providing jobs and income-generating opportunities for youths and other community groups had an ambiguous association with community engagement in school meal programs. Conclusions: Findings underscore the importance of creating jobs and income-generating opportunities for women to improve community engagement in school meal programs. Formulating strategies that empower woman’s entrepreneurship may foster their involvement and engagement in school meal programs, promising to successfully link these programs with food bank initiatives among implementing countries. (shrink)

Corporations have often been taken to be the paradigm of an organization whose agency is autonomous from that of the successive waves of people who occupy the pattern of roles that define its structure, which licenses saying that the corporation has attitudes, interests, goals, and beliefs which are not those of the role occupants. In this essay, I sketch a deflationary account of agency-discourse about corporations. I identify institutional roles with a special type of status function, a status role, in (...) which the collectively accepted function is expressed in part through its occupier’s intentional expression of her agency in that role. I identify institutions as systems of status roles and show how this is compatible with seeing the agency of institutions generally, even over time periods in which there is complete change in role occupiers, as a matter of the contributions only of individual agents. I explain how the reduction of the institution to its members is compatible with its potentially having had a completely different membership. I show in the case of the corporation in particular that, once we see its origins and function, the surface features of legal discourse about corporate agency are misleading and are compatible with a deflationary account of corporate agency. I show in connection with this that the corporation is to be identified with its shareholders, and that where a corporation separates ownership and control, its managers and employees are proxy agents of the shareholders doing business under the corporate form. Finally, I canvass the legitimate ways of construing ordinary talk about corporate intention, belief, and so on, in light of this, none of which support the attribution of genuine agency or intentionality to any group per se associated with the corporation. (shrink)

Cloud computing has become an essential component of enterprises and organizations globally in the current era of digital technology. The cloud has a multitude of advantages, including scalability, flexibility, and cost-effectiveness, rendering it an appealing choice for data storage and processing. The increasing storage of sensitive information in cloud environments has raised significant concerns over the security of such systems. The frequency of cyber threats and attacks specifically aimed at cloud infrastructure has been increasing, presenting substantial dangers to the data, (...) reputation, and financial stability of enterprises. Conventional security methods can become inadequate when confronted with ever intricate and dynamic threats. Artificial Intelligence (AI) technologies possess the capacity to significantly transform cloud security through their ability to promptly identify and thwart assaults, adjust to emerging risks, and offer intelligent perspectives for proactive security actions. The objective of this research study is to investigate the utilization of AI technologies in augmenting the security measures within cloud computing systems. This paper aims to offer significant insights and recommendations for businesses seeking to protect their cloud-based assets by analyzing the present state of cloud security, the capabilities of AI, and the possible advantages and obstacles associated with using AI into cloud security policies. (shrink)

This anthology aims to explore the current Norwegian context of implementation of Responsible Research and Innovation (RRI) and Corporate Social Responsibility (CSR),as well as the challenges and fragilities associated with it. It is grounded in the experience of a networking and learning centre called AFINO (acronym for‘ Ansvarlig Forskning og Innovasjon i NOrge’, or Responsible Research and Innovation in Norway),to which most of the authors of this book are affiliated. Whether the authors are trying to illustrate a fragility or challenge, (...) to understand its origins, or to illustrate how they have been tackled or how things developed in unexpected ways that raise new fragilities and questions, we believe that all chapters contribute to bringing to light the richness of the domains of research, innovation, policy, and business. (shrink)

Using Australia to illustrate the case, in this paper it is argued that the transformation of universities into businesses and the undermining of the liberal arts is motivated by either contempt for or outright hostility to democracy. This is associated with a global managerial revolution that is enslaving nations and people to the global market and the corporations that dominate it. The struggle within universities is the site of a struggle to reverse the gains of the Radical Enlightenment, the tradition (...) of Enlightenment that, committed to upholding and developing the civic humanism of the Renaissance, strove for liberty, understood as democratic self-governance. The central place the liberal arts had in upholding this liberty is shown. Inspired by the Ancient Greek notion of paideia, the liberal arts, which originated in republican Rome, was the form of education required designed for free people, in opposition to the specialist education appropriate for slaves, to inspire them to maintain their liberty and enable them to govern themselves. While not always upholding this ideal, it is argued in this paper that the liberal arts always kept alive this quest for liberty, bequeathing this quest to the Renaissance philosophers and to the proponents of the Radical Enlightenment. With managerialism and the undermining of democracy, such education and the questioning, creative people it produced, are now seen as a threat to the new global corporatocracy who, to achieve cultural hegemony, have coöpted university managers and academics to impose their agenda to cripple the liberal arts. Their goal, never fully articulated as such but successfully prosecuted, is a dumbed-down population. (shrink)

Corporate activities conducted under the banner of creating shared value (CSV) have gained popularity over the last decade, and some MNCs have espoused that CSV has entered the heart of their practices. There has, however, been criticism about the lack of a standard definition of CSV. The purpose of the current study was to develop a working definition of CSV by identifying distinctions between CSV and various conceptions of corporate social responsibility (CSR). We conducted 26 semi-structured interviews with managers and (...) stakeholder representatives of five multinational corporations (MNCs) and three small and medium enterprises (SMEs), all headquartered or rooted in Asia. These firms had received public recognition for their CSV engagement. We compared and contrasted interviewees’ conceptions and descriptions of CSV and traditional CSR (philanthropy) and mapped these against Carroll’s four-layer model of responsible corporate management. Interviewees tended to frame CSV as a sustainable business model that generates social and economic value simultaneously. Traditional CSR was characterized as “giving back” some of the surplus from economic returns. In addition, interviewees described examples of strategic CSR, which involved pump-priming interventions for empowering and enabling stakeholders of the CSV practices of the focal firm to participate in the associated wealth and well-being co-creation. Keywords: Corporate social responsibility, creating shared value, qualitative, Asia. (shrink)

Whether or not capitalism is compatible with ethics is a long standing dispute. We take up an approach to virtue ethics inspired by Adam Smith and consider how market competition influences the virtues most associated with modern commercial society. Up to a point, competition nurtures and supports such virtues as prudence, temperance, civility, industriousness and honesty. But there are also various mechanisms by which competition can have deleterious effects on the institutions and incentives necessary for sustaining even these most commercially (...) friendly of virtues. It is often supposed that if competitive markets are good, more competition must always be better. However, in the long run competition enhancing policies that neglect the nurturing and support of the bourgeois virtues may undermine the continued flourishing of modern commercial society. (shrink)

Whereas there is extensive documentation that attribute framing influences the content of peoples thought, we generally know less about how it affects the processes assumed to precede those thoughts. While existing explanations for attribute framing effects rely completely on valence-based associative processing, the results obtained in the present study are also consistent with the notion that negative framing stimulates more effortful and thorough information processing than positive framing. Specifically, results from a simulated business decision-making experiment showed that decision makers (...) receiving negatively framed information had significantly better recall than those receiving positively framed information. Furthermore, decision makers in the negative framing condition were less confident than decision makers in the positively framed condition. Finally, compared to a no-framing condition, decision makers receiving positive framing deviated significantly more in evaluation than decision makers receiving negative framing did. (shrink)

Some progress has been made in recent decades to articulate corporate social responsibility (CSR) and, more recently, to associate CSR with international enforcement of human rights. This progress continues to be hampered, however, by the ability of a multinational corporation (MNC) that violates human rights not only to shift liability from itself to a nation-state but even to win compensation from that nation-state for loss of profits due to restrictions on its business activities. In the process, the nation-state’s sovereignty (...) is diminishing; and, in effect, though still attributed to nation-states, it is being transferred to the MNC. The main aim of this article is (1) to draw on normative considerations to claim that this MNC proto-sovereignty should be modified and (2) to contend that this can eventually be accomplished by adding to corporate adoption of CSR guidelines a regimen of global human rights enforcement. I base this contention on expectations about the internationalization of corporate criminal law and the globalization of civil society in general and of NGOs in particular. I consider various jurisdictions but I focus on US jurisprudence. (shrink)

OBJETIVO A gestação nos mamíferos domésticos é um processo fisiológico que implica mudanças físicas, metabólicas e hormonais na fêmea, que culminam com o nascimento de um novo indivíduo. Desta forma, a compreensão de tais mudanças e como estas favorecem um ambiente ideal de desenvolvimento embrionário inicial, até a placentação e a fisiologia envolvidas durante esses processos é fundamental na tomada de decisões quanto à saúde reprodutiva da fêmea, na seleção de futuras matrizes e até mesmo para a saúde fetal e (...) sanidade do novo animal. Neste capítulo, o estudante compreenderá de forma clara, concisa, didática e objetiva, as adaptações maternas e fetais para o estabelecimento da gestação após a fecundação, o desenvolvimento desta e também identificará as diferenças existentes entre as espécies de interesse zootécnico. INTRODUÇÃO O estabelecimento da gestação nos mamíferos domésticos inclui três etapas fundamentais: o reconhecimento materno da gestação ou prenhez (RMP), a implantação e a placentação. Dentro da fisiologia da reprodução nos mamíferos, a implantação e a placenta- ção constituem processos essenciais na nutrição do embrião e do feto e, portanto, para seu desenvolvimento; devido a isso, são etapas críticas para a produção animal já que possuem um efeito direto sobre a eficiência reprodutiva. Nos bovinos leiteiros, por exemplo, estima-se uma taxa de fertilização perto de 95%, embora apenas 55% desses zigotos se desenvolvam e cheguem ao parto, o qual representa uma perda de gestações perto de 35%. Entre 70% e 80% das mortes embrionárias ocorrem durante as três semanas seguintes à ovulação, o que coincide com o período no qual se estabelecem os processos de implantação e placentação supracitados. O desenvolvimento embrionário precoce depende da sincronia de eventos entre o oviduto-útero e o embrião. Foi determinado que a presença do embrião pode modificar as secreções ovidutais e uterinas durante as fases iniciais de desenvolvimento. O ambiente endócrino materno (predominância de progesterona) também modula as características das secreções ovidutais e uterinas para assegurar a sobrevivência embrionária no caso da fertilização ter sido bem sucedida. Se este último ocorrer, então o embrião deverá indicar à mãe a sua existência para que sejam mantidas as condições adequadas ao seu desenvolvimento. Como supracitado, o embrião em seu curso pelo oviduto requer certas secreções para sobreviver e desenvolver-se, no entanto, graças à fertilização in vitro, têm-se dispensado a importância das secreções ovidutais, já que se observou que um embrião é capaz de se desenvolver em condições laboratoriais fora do aparelho reprodutor materno durante as suas fases iniciais, e consegue estabelecer uma gestação normal que chega a termo após a sua reintrodução no útero. Em estágios mais tardios de desenvolvimento o embrião necessita necessariamente do meio uterino para sobreviver e continuar o seu crescimento. No bovino, por exemplo, o embrião só é capaz de alongar-se estando dentro do útero, indicando a presença de fatores específicos necessários para que o embrião se desenvolva de maneira normal. Um meio endócrino no qual predomina a progesterona materna durante a gestação induz a secreção do histiotrofo (ou leite uterino) que permite a nutrição e a sobrevivência do embrião antes da implantação e da formação da placenta, através do qual obterá a maioria do fornecimento e intercâmbio necessários para continuar o seu desenvolvimento intra-uterino. SEGMENTAÇÃO E DESENVOLVIMENTO EMBRIONÁRIO PRECOCE O desenvolvimento embrionário precoce, conhecido como período de pré- -implantação, é essencial; inclui processos de divisão e diferenciação celular que são realizadas no início com uma elevada sincronização para garantir o desenvolvimento correto do indivíduo dentro do útero. Esta fase envolve a passagem do zigoto (unicelular), a embrião (multicelular) e, por fim, em concepto (quando se distingue o embrião com suas membranas extraembrionárias). O desenvolvimento precoce é o estágio mais dinâmico e vulnerável na formação de um indivíduo. Investigações recentes demonstraram que alterações nesta etapa podem modificar características produtivas ou reprodutivas durante a vida adulta. É por isso que é necessário conhecer as etapas fisiologicamente normais envolvidas neste processo (figura 1). Em fases mais tardias de desenvolvimento, o embrião se converterá em um feto com todos os sistemas e tecidos diferenciados observados num animal adulto. Após a fertilização, o zigoto resultante é capaz de dar origem a um novo organismo completo, de modo que se considera como uma célula totipotencial. O desenvolvimento embrionário começa e se consegue graças a uma série de divisões mitóticas conhecidas como segmentação ou clivagem (cleavage, em inglês). A primeira divisão mitótica dá origem a duas células filhas idênticas (figura 1), e ocorre por volta das 20 às 30 horas depois da fertilização, com divisões subsequentes a cada 12 a 24 h, dependendo da espécie. As células resultantes destas divisões são conhecidas como blastômeros. A orientação da divisão inicial que dá origem aos dois primeiros blastô- meros, parece ser guiada pela posição dos corpos polares. As divisões iniciais das células embrionárias são sincrônicas, no entanto, conforme o desenvolvimento se torna assincrônicas. Assim, a divisão mitótica inicial dá origem a um embrião de duas células (dois blastômeros), a segunda a um embrião de quatro células, a terceira a um de oito células e a quarta a um com 16 células, onde passa a ser chamado de mórula. Estas divisões são realizadas sem o aumento do volume do citoplasma, para que seja restabelecida uma proporção celular mais adequada à das células somáticas, já que o ovócito é a célula mais grande do organismo (um ovócito mede entre 100 e 150 μm do ovócito, enquanto uma célula somática mede de 10 a 20 μm); e porque o embrião ainda está contido dentro da zona pelúcida (figura 1). Um dos pontos críticos durante o desenvolvimento embrionário precoce é a ativação do genoma embrionário. Durante as etapas iniciais após a fertilização, as proteínas e RNAs “herdados” do ovócito são responsáveis pelo metabolismo e desenvolvimento inicial do embrião. É apenas até o estágio de quatro (ratos) ou oito blastômeros (espécies domésticas e humanas) em que o embrião começa a sintetizar o seu próprio RNAm (mensageiro) e as proteínas específicas necessárias para controlar o seu crescimento e metabolismo. A qualidade do ovócito que é fertilizado, consequente- mente, tem um grande impacto sobre a sobrevivência inicial do embrião. Quando o embrião atinge uma média de 16 a 32 células é conhecido como mórula (tabela 1) (do latim morus: mora), e nesta fase o embrião começa a compactar-se, o que ocorre porque começam a estabelecer-se diferentes uniões celulares, de acordo com a relação espacial entre os blastômeros. As células centrais desenvolvem-se incluindo entre elas junções comunicantes, conhecidas também como junções GAP, enquanto as que se encontram na periferia estabelecem uniões estreitas, dando origem a duas subpopulações distintas de blastômeros: periféricos e centrais. Cabe mencionar que os blastômeros que compõem a mórula ainda são células capazes de dar origem a um novo indivíduo completo, ou seja, são totipotenciais. À medida que a mórula continua a dividir-se e a crescer, as células localizadas na periferia começam a liberar sódio para os espaços intercelulares, criando uma diferença na pressão osmótica seguida pela entrada de água ao embrião. O líquido se acumula e provoca a separação das células, distinguindo ainda mais as duas subpopulações de células mencionadas (periféricas e centrais) e forma-se uma cavidade cheia de líquido. Esta cavidade é conhecida como blastocele; com a sua formação o embrião entra em fase de blastocisto (figura 1, tabela 1). Da subpopulação celular da periferia se origina do trofoblasto (trofoectoderma) que formará a maioria das membranas extraembrionárias (placenta), e da subpopulação central é estabelecida a massa celular interna ou embrioblasto, que dará origem ao embrião propriamente dito, ou seja, ao feto. Ao continuar a multiplicação e crescimento do trofoblasto à medida que o blastocisto se desenvolve, as células da massa interna se diferenciam novamente em dois segmentos distintos: a endoderme primitiva ou hipoblasto e o epiblasto (figura 1), em que todos os tecidos do organismo (saco vitelino) são originados e as células germinativas primordiais. Uma vez formado, o epiblasto continua a dividir-se e a diferenciar-se para dar origem às três placas ou camadas germinativas conhecidas como endoderme, mesoderme e ectoderme. Este processo é conhecido como gastrulação, e durante este diferem-se no embrião as porções craniais, caudais, dorsais e ventrais, processo conhecido como polaridade do embrião, que orienta o desenvolvimento dos diversos tecidos e órgãos do indivíduo. À medida que o blastocisto continua crescendo e diferenciando-se, vai-se acumulando mais líquido no blastocele, com o que a pressão interna aumenta e a zona pelúcida começa a ficar mais fina. Este fato, juntamente com a ação de proteases produzidas pelo embrião, leva à ruptura da zona pelúcida e à saída do blastocisto (eclosão), pelo que, uma vez liberado, o embrião é conhecido como blastocisto eclodido. O trofoblasto embrionário entra, então, em contato direto com o endométrio, o que é considerado como o início da implantação. IMPLANTAÇÃO O trofoblasto embrionário, também conhecido como trofoectoderma, dá origem à maioria das membranas fetais ou placenta fetal. O processo no qual o trofoblasto se une ao endométrio materno é conhecido como implantação; para isso ocorre uma série de processos altamente sincronizados envolvendo secreções embrionárias e maternas, e interações físicas, durante um período limitado conhecido como janela de receptividade. A implantação é considerada um processo gradual que genericamente se divide em cinco fases, algumas das quais podem sobrepor-se parcialmente e diferir segundo a espécie: 1. Eclosão do blastocisto da zona pelúcida (figura 2); -/- 2. Pré-contato e orientação do blastocisto. É o contato inicial entre as células do trofoblasto e do epitélio endometrial, bem como a orientação da massa celular interna e do trofoectoderma, que assume especial importância em espécies cuja implantação é invasiva, como em roedores e primatas; 3. Aposição - refere-se ao posicionamento do blastocisto numa determinada área e de uma forma específica no útero. Começa a interdigitação das vilosidades coriônicas com o epitélio luminal do endométrio. 4. Adesão - requer sistemas de sinalização que envolvem glicoproteínas de adesão, como integrinas, selectinas e galectinas, com os seus ligantes, tanto no epitélio luminal como no epitélio trofoectoderma. 5. Invasão endometrial - este termo se relaciona ao tipo de placentação e é pertinente sobretudo para aquelas espécies onde existe uma fusão entre células do trofoblasto e do epitélio do endométrio durante a formação da placenta, ou que as células trofoblásticas penetrem as camadas endometriais e até modifiquem as células do endométrio que as rodeiam. Existem três tipos de implantação ou nidação. Na nidação central ou não invasiva, a vesícula embrionária ocupa uma posição central na luz do útero e, na sua relação com a mucosa uterina, unicamente através das vilosidades coriônicas (projeções das células trofoblásticas dentro das quais crescem capilares do feto), há adesão mas não invasão da mucosa. Este tipo ocorre nos ungulados domésticos, mas não em carnívoros. Na nidação excêntrica a vesícula embrionária está inserida num canal profundo da mucosa, parcialmente isolada da luz principal, e se apresenta na rata, cadela e gata. A nidação intersticial é própria dos primatas, rato e cobaia, e nesta produz-se a destruição do epitélio e do tecido conjuntivo do útero, de modo que a vesícula embrionária se afunda na própria lâmina mucosa e se desenvolve em um espaço intersticial. Até o momento da implantação, a nutrição do embrião é histotrófica, sendo as substâncias necessárias absorvidas através do trofoblasto, como foi mencionado anteriormente. A partir deste momento, o trofoblasto começa o desenvolvimento de uma série de membranas extraembrionárias que permitirão finalmente a troca de nutrientes e metabólitos entre o sangue materno e o do embrião, constituindo a placenta. Um fato necessário na implantação é a perda de receptores para progesterona no epitélio luminal do endométrio, e pré-sensibilização do mesmo pelos estrógenos. Apesar de parecer um efeito contraditório, este requisito permite o desaparecimento de uma camada de mucina e outros compostos proteicos, que revestem o endométrio e que atuam como uma película antiaderente que inicialmente não permite a aposição e adesão do embrião. O desaparecimento desta camada ocorre durante a janela de receptividade, seja em toda a superfície do endométrio (ruminantes, suínos e roedores) ou nas zonas específicas onde o blastocisto será implantado (humano e coelho). Por esta razão, a interação física entre o embrião e o endométrio desempenha um papel importante na implantação. Uma vez que a camada de glicoproteínas desaparecer, é possível a aposição do trofoectoderma embrionário e das células epiteliais do endométrio, iniciando assim a implantação propriamente dita através da intercomunicação entre os dois tecidos. A implantação pode ser considerada como a fixação do embrião ao útero a partir do ponto de vista físico e funcional. No entanto, como se trata de um processo progressivo e gradual, em que algumas das suas fases podem ser parcialmente sobrepostas, não existe consenso sobre o período em que se inicia e termina. Na borrega, por exemplo, estima-se que ocorra entre o dia 10 e o dia 22, enquanto na vaca entre os dias 11 e 40 pós-ovulação. Nas espécies polítocas, isto é, fêmeas que parem várias crias como as porcas, os blastocistos se distribuem ao longo dos cornos uterinos como resultado de movimentos musculares da parede uterina, aparentemente regulados por prostaglandinas e outros fatores secretados pelo útero. Por exemplo, nas porcas, os blastocistos se movem livremente entre os cornos, e a distribuição dos embriões ao implantar-se é mais uniforme do que poderia ser esperado se ocorresse meramente ao acaso. Tem observado que a deficiência na produção de ácido lisofosfatídico 3 (LPA3) e/ou seu receptor, ocasiona uma falha na distribuição dos embriões no útero. Por outro lado, não há evidência de que um blastocisto implantado exerça alguma influência inibitória sobre a implantação de outro blastocisto próximo a ele. Como supracitado, o processo de implantação inclui uma complexa interação entre o embrião e o útero, e cada um deles provê de estímulos essenciais para favorecer a progressão do outro, apresentando-se diferenças em tempos e particularidades dentro das diferentes espécies. -/- Porca O período de adesão situa-se entre os dias 12 e 24 após a fertilização. Ao redor do dia sete, o blastocisto é eclodido, porque o trofoblasto está em contato direto com o epitélio uterino e começa a proliferar com rapidez. O endoderme se forma e o blastocisto muda de uma pequena vesícula esférica para um tubo muito alongado que chega a medir cerca de um metro em poucos dias, ele que lhe proporciona uma superfície muito ampla para a absorção de nutrientes. Cadela Os embriões migram entre os dois cornos uterinos do dia 12 ao 17 após a fertilização, distribuindo-se de maneira uniforme. Estes embriões aderem ao endométrio entre os dias 16 e 18, e alcançam sua implantação final entre o dia 17 e 20 da gestação. Cabe ressaltar que nos caninos o período de pré-implantação é o mais longo das espécies domésticas, o que ocorre porque a cadela ovula ovócitos imaturos (ovócitos primários) que precisam amadurecer por dois a três dias, para formar ovócitos secundários, antes que a fertilização seja possível. Por isso, o zigoto canino chega à junção útero-tubárica entre o sétimo e o décimo dia após o pico pré-ovulatório de LH (a ovulação ocorre, em média, dois dias após o pico de LH), entrando no útero em estágio de mórula ou blastocisto em torno dos dias 10 a 12 depois do referido pico. Ovelha O desenvolvimento precoce do blastocisto é muito semelhante ao da porca. Observa-se certo grau de adesão desde o dia 10 da gestação, mas o alongamento do embrião é menos extenso do que em suínos e tem início entre o dia 11 e 12. Para a terceira semana o embrião ovino chega a medir até 30 cm de comprimento. O processo de implantação é concluído aproximadamente entre a quarta e quinta semana de gestação (figura 3). Vaca O processo de implantação é semelhante ao da borrega, mas tem início mais tarde. A zona pelúcida se perde por volta do dia 9 a 10 (blastocisto eclodido) e o embrião começa a alongar-se ao redor do dia 12 a 14, atingindo um comprimento de cerca de 60 mm para o dia 16, embora possa haver uma grande variação individual. A partir do dia 33, o córion é formado e existe uma adesão inicial que inclui dois ou quatro cotilédones, que se interdigitam rapidamente com o tecido materno de modo que o embrião começa a nutrir-se através deles. Égua O blastocisto atinge um diâmetro de cinco centímetros aos dois meses e pratica- mente não se alonga. Entre os dias seis e sete após a ovulação, o embrião começa a revestir-se de uma camada glicoproteica que se forma entre o trofoectoderma e a zona pelúcida e que contém e mantém o embrião esférico depois de ter eclodido. Esta cápsula é uma estrutura única nos equinos (cápsula embrionária), afina-se no dia 18 e se perde entre os dias 21 e 23 de gestação. Na décima semana as microvilosidades do córion se interdigitam com a mucosa da parede uterina e na semana 14 é completada a implantação. Espécies não domésticas Em algumas espécies como os marsupiais, os ursos, focas, doninhas e alguns tipos de cervídeos, pode interromper-se temporariamente o desenvolvimento do embrião in utero e adiar a sua implantação, como estratégia evolutiva para favorecer o nascimento das crias em condições ambientais favoráveis para a sua sobrevivência. Esta estratégia é conhecida como diapausa e pode ser uma condição obrigatória ou facultativa para cada gestação, dependendo da espécie. Os mecanismos que a desencadeiam e a concluem não estão totalmente explicados e são espécie-específica. RECONHECIMENTO MATERNO DA GESTAÇÃO (RMG/RMP) O estabelecimento da gestação em mamíferos domésticos requer a presença de um corpo lúteo CL funcional que produz progesterona em quantidades adequadas para manter o desenvolvimento embrionário inicial e permitir mudanças necessárias durante o período de peri-implantação. Para que o corpo lúteo seja mantido e a fêmea seja impedida de reiniciar um novo ciclo estral, o embrião deve sinalizar sua presença para a mãe. O sinal para o reconhecimento materno da gestação (RMG) provém então do embrião e podem ser de dois tipos: luteotrópico ou anti-luteolítico. No primeiro, a(s) substância(s) produzida(s) pelo embrião que atua(am) sobre o corpo lúteo para manter sua funcionalidade, por exemplo a gonadotrofina coriônica humana (hCG) e a prolactina em roedores. O segundo tipo de sinal previne ativamente a luteólise, e é o mecanismo presente nas espécies domésticas em que o embrião produz substâncias como o interferon-τ (IFN-τ) em ruminantes ou os estrógenos em suínos. Ruminantes Como supracitado, o IFN-τ é responsável pela sinalização para o reconhecimen- to materno da gestação neste grupo que engloba cabras, ovelhas e vacas (figura 4). É um fator produzido pelas células do trofoblasto do embrião, e pode ser detectado a partir dos dias 11 a 12 em ovinos e de 14 a 15 em bovinos. Uma vez secretado, o IFN-τ impede a lise do corpo lúteo (efeito anti-luteolítico) por meio do bloqueio indireto da síntese de prostaglandina F2 alfa (PGF2α). No trabalho acerca do ciclo estral foi explicado que a luteólise requer a presença de receptores de ocitocina (OTR) no endométrio, que ao unir-se ao seu ligante, a ocitocina (proveniente inicialmente do hipotálamo e posteriormente de origem lútea), estimulam a produção de PGF2α e estabelecem um feedback positivo, que culminará na destruição do CL. Para que os OTRs sejam sintetizados, é necessária uma estimulação prévia do endométrio com estradiol, que ocorre através da ligação com seus receptores (ER-1). O mecanismo pelo qual o IFN-τ impede a lise do corpo lúteo é bloqueando, direta ou indiretamente, a síntese de OTR e, consequentemente, a produção pulsátil de PGF2α. Suínos No caso dos suínos, considera-se que o sinal embrionário para o reconhecimento materno da gestação são os estrógenos, produzidos pelos embriões em torno do dia 11 a 12 pós-ovulação. O endométrio suíno produz PGF2α que, quando não há gestação, é secretado na circulação uterina (secreção endócrina), de onde é transportada em direção ao CL para causar luteólise. Se há embriões no útero produzindo suficiente quantidades de estradiol, isso redireciona a secreção de PGF2α para o lúmen uterino (secreção exócrina), evitando que seja liberado para a circulação e, portanto, é sequestrado impedindo que chegue ao corpo lúteo (figura 5). É importante enfatizar que a produção de PGF2α não é inibida, mas sua secreção é redirecionada. Este mecanismo é conhecido como teoria endócrino-exócrina. Vale ressaltar que para o sinal de reconhecimento materno da gestação na porca ser eficiente, é necessário a presença de pelo menos quatro embriões, dois em cada corno, uma vez que se não houver dois embriões, um em cada corno, ocorre luteólise e reinicia a atividade cíclica. Embora os estrógenos sejam identificados como o sinal de reconhecimento materno nesta espécie, o embrião suíno também produz outros fatores, como a PGE2 e o ácido lisofosfatídico, considerado necessário para o estabelecimento adequado da gestação. A PGE2 ocasiona uma redução na produção de PGF2α em favor da PGE2 no endométrio e favorece a contração do miométrio para permitir a migração de embriões. O ácido lisofosfatídico, juntamente com seu receptor, é um fator crítico que favorece a migração intra-uterina, e permite uma distribuição adequada dos embriões ao longo dos cornos. Outras substâncias produzidas pelo embrião suíno são o IFN-delta (IFN-δ) e IFN-gama (IFN-γ), que não possuem ação anti-luteolítica, mas poderiam intervir no processo de implantação. Equinos Na égua é essencial que o embrião, ainda rodeado pela sua cápsula embrionária, migre de 12 a 14 vezes por dia através do útero, entre os dias 12 e 14 após ovulação, a fim de distribuir o fator de reconhecimento materno (figura 6). Embora seja sabido que existe, este último ainda não foi identificado, mas foi estabelecido que é da natureza proteica e seu principal efeito é a inibição da produção endometrial de PGF₂α, mediante a redução na formação do receptores de ocitocina; desta forma, evita-se o início do sinal luteolítico. É interessante notar que nesta espécie a ocitocina não é de origem lútea e sim endometrial. Primatas Ao contrário das espécies domésticas mencionadas, o mecanismo de ação do sinal de reconhecimento materno em primatas é luteotrópico. No humano, o embrião produz gonadotrofina coriônica humana (hCG) após o início da implantação (dias 6 a 8). A hCG estende a vida funcional do CL por meio de sua ligação a receptores lúteos para LH, estimulando assim a liberação de progesterona. Este efeito permite a “sobrevivência” do CL pelo menos até o momento em que a produção de progesterona é transferida para a placenta para levar a gestação a termo. Carnívoros Na cadela não é necessário o reconhecimento da gestação, já que normalmente o corpo lúteo tem uma vida média maior que a duração da gestação. Como na égua, a migração dos embriões através do útero antes da implantação pode favorecer o reconhecimento materno. Adicionalmente, tem sido descrito que durante o período antes da implantação (< 10 dias depois da ovulação), há um aumento na expressão de genes relacionados com a imunomodulação local (IFN-γ, IL-4 e CD8+), que não estão presentes em cadelas durante o diestro. A produção de IFN-γ por parte do embrião canino, como em outras espécies, pode estar envolvida na implantação ou o reconheci- mento da gestação, mas até o momento não foi demonstrado de forma inequívoca. Na gata doméstica, o fator que favorece o reconhecimento materno da gestação ainda não foi descrito. Temos que lembrar que seja qual for o mecanismo envolvido, a produção do sinal embrionário de reconhecimento materno da gestação é importante, já que a contínua presença de progesterona na circulação materna, faz possível que ocorra o desenvolvimento precoce do embrião e eventualmente a implantação, com a formação do órgão temporal mais importante para o desenvolvimento fetal: a placenta. Resumindo, o sinal enviado pelo embrião deve ser dado antes do útero começar a secretar PGF2a, hormônio que causa a destruição do corpo lúteo produtor da progesterona necessária para a gestação. O embrião deve secretar algumas substâncias (denominadas EPF: Early Pregnant Factors/fatores de gestação precoce) que capte o endométrio materno e sirva para evitar a ação luteolítica da PGF2a. Na porca, em vez de ser evitada a secreção de PGF2a, o referido hormônio é “sequestrado na luz do útero” e, desta forma, passa a secretar-se em forma exócrina, sem ter efeito sobre o corpo lúteo. No bovino, o reconhecimento materno da gestação é o processo fisiológico no qual o embrião, por meio de sinais moleculares como a secreção de interferon-τ (IFN-τ), anuncia sua presença no trato reprodutivo materno a fim de evitar que seja desencadeado o mecanismo luteolítico exercido pela PGF2a sobre o corpo lúteo. PLACENTAÇÃO Nos mamíferos domésticos, o processo de implantação é gradual e prolongado, e ocorre paralelamente a processos como a gastrulação e a formação de membranas extra- embrionárias: saco vitelino, âmnio, alantóides e córion. A formação das membranas extraembrionárias nos mamíferos eutérios, ou seja, aqueles que formam uma placenta completa, é um processo indispensável que permite ao embrião aderir-se ou implantar-se ao endométrio materno. As quatro membranas extraembrionárias mencionadas são formadas a partir do trofoblasto, mesoderme e endoderme embrionários. O saco vitelino fornece nutrientes no desenvolvimento inicial do embrião e se converte em vestigial quando a gestação progride; tem origem no endoderma primitivo, estrutura que junta com o trofoblasto e o mesoderma, formam o córion e âmnions. O âmnion contém o líquido amniótico que está em contato direto com o embrião e é a membrana mais interna; ademais, protege o feto, proporciona lubrificação para o parto e serve como um depósito para urina e resíduos fetais. O córion, por outro lado, é a membrana mais externa do embrião e, portanto, é a que entra em contato direto com o endométrio uterino materno; se fixa ao útero, absorve nutrientes do útero, permite a troca gasosa materno/fetal e produz hormônios. O alantóide se origina de uma evaginação do intestino primitivo e é de onde surge o sistema vascular da placenta fetal; a fusão com o córion (placenta cotiledonária), carrega os vasos sanguíneos do cordão umbilical, que liga o feto com o alantóide e é um reservatório de nutrientes e resíduos. Conforme o embrião se desenvolve, o saco vitelino regride e o alantóide se enche de líquido, pelo que este último se funde com o córion para formar o corioalantóides, que se torna a membrana mais externa e, portanto, a porção fetal do placenta. A placenta é um órgão temporário que representa uma interface através da qual realiza a troca bidirecional de nutrientes, gases, hormônios e outras substâncias entre a mãe e o feto. A unidade funcional da placenta são as vilosidades corioalantóicas, as quais são projeções pequenas dos corioalantóides que se interdigitam com o endométrio uterino, cuja superfície de absorção permite essa troca. A placenta é um órgão endócrino capaz de produzir uma gama de hormônios que ajudam a controlar o ambiente uterino, favorecendo o desenvolvimento do feto, além disso possui um papel importante no momento do parto. Nas diferentes espécies a placenta tem características particulares, pelo qual existem várias classificações, de acordo com a sua posição uterina, a distribuição das vilosidades corioalantóicas e a sua histologia. Posição uterina Refere-se à posição do concepto em relação ao lúmen uterino (figura 7). Central: O concepto ao ser implantado permanece em contato com o lúmen do útero. A maioria das espécies domésticas de importância veterinária estão dentro desta classificação. Excêntrica: O concepto penetra parcialmente o endométrio materno, mas mantém um certo contato com o lúmen uterino. Os roedores (ratos e ratos) e a coelha possuem este tipo de placentação. Intersticial: O embrião invade o endométrio, perde contato com o lúmen uterino, e ao crescer o lúmen uterino se oblitera. Os humanos e a maioria dos primatas mostram este tipo de placenta. Distribuição das vilosidades As vilosidades que formam a interface materno-fetal podem estar distribuídas de maneira diferente ao longo da superfície dos corioalantóides, pelo qual a placenta pode ser classificada como (figura 8): Difusa: Neste tipo de placenta as vilosidades estão distribuídas ao comprimento de toda a superfície do córion (corioalantóides) de maneira uniforme. As placentas de suínos e equinos se enquadram nesta classificação, embora, nesta última espécie, as vilosidades formem estruturas mais ramificadas, que são chamadas microcotilédones (figura 10). Zonal: Esta placenta se apresenta nos carnívoros domésticos, tanto caninos como felinos. As vilosidades que determinam a zona de troca de nutrientes e resíduos, e de ligação com o endométrio são delimitadas de forma a formar uma cintura central em torno do feto (figura 9). Distingue-se também uma segunda região chamada paraplacenta, que se localiza em ambos lados deste “cinto”, e do qual a função não é inteiramente conhecida, embora sabe-se que desempenha um papel importante na troca de ferro da mãe para o feto. As extremidades laterais dos corioalantóides nestas placentas não possuem vilosidades por isso não se ligam ao endométrio. Uma terceira região é a zona transparente nas extremidades distais do córion que tem pouca vascularização. Esta zona pode estar envolvida na absorção de materiais diretamente do lúmen uterino (figura 11). Cotiledonária: É o tipo de placentação que se encontra presente nos ruminantes (ovinos, caprinos e bovinos). As vilosidades coriônicas nestas espécies são agrupadas em pequenas áreas do córion chamadas cotilédones, que se interdigitam e fundem-se parcialmente com locais delimitados no endométrio chamados carúnculas, formando, em conjunto, estruturas conhecidas como placentomas. Cabe destacar que as carúnculas carecem de glândulas endometriais, que só estão presentes nas porções inter-carun- culares do endométrio. Os placentomas, por sua vez, são altamente vascularizados e são remodelados com o progresso da gestação, ramificando-se para aumentar a superfície de troca e o fluxo sanguíneo para aumentar os requisitos do feto em crescimento. Nas zonas inter-carunculares, a placenta é ligada ao endométrio por meio de sistemas de adesão superficial que envolvem glicoproteínas. Acredita-se que a adesão do concepto com o endométrio (carúnculas) é estabelecida em torno de 30 dias em ovinos e 40 dias em bovinos. (figuras 13 a 17). Discoidal: Nestas placentas, as vilosidades agrupam-se numa área circular ou oval, formando uma estrutura discoidal. Este tipo de placenta é encontrada principal- mente em coelhas, roedores e primatas, incluindo os humanos. Histologicamente Esta classificação considera o número de camadas de tecido que compõem a placenta e que separam a circulação materna da circulação fetal (tabela 3). O número máximo é de seis camadas, três do lado fetal (córion, tecido intersticial e endotélio do vaso sanguíneo) e três do lado materno (epitélio endometrial, tecido intersticial e endotélio vascular) (figura 19 e tabela 3). O modo de distinguir e nomear os diferentes tipos de placenta nesta classificação é usando como prefixo a camada materna que está em contato com o córion fetal. As diferentes placentas baseados em sua histologia são as seguintes (figura 19): Epiteliocorial: É o menos íntimo entre os tipos de placentas (figura 20). Estas placentas conservam intactas as seis camadas de tecido, portanto que mantêm as circulações materna e fetal mais separadas, e consideradas como as mais impermeáveis. Este tipo de placenta está presente na porca e égua. Lembre-se de que as placentas da porca e da égua são diferentes e as vilosidades ocupam uma grande proporção da área de superfície do córion (figura 19 A). Também apresenta-se nos ruminantes, no entanto, as placentas dos ruminantes apresentam algumas características particulares que as colocam como um subgrupo e se chamam sinepiteliocorial ou sindesmocorial (figura 19 B). Na vaca, este tipo apresenta-se nos primeiros 2-3 meses de gestação. Além da característica de erosão parcial do epitélio endometrial, um tipo de célula único é encontrado na placenta de ruminantes. Essas células são chamadas células gigantes binucleadas. Como o nome indica, elas são caracterizadas como bastante grandes e com dois núcleos. Na placenta dos ruminantes, algumas células do epitélio coriônico conhecidas como células binucleadas, se fundem com algumas células do epitélio endometrial, criando inicialmente células gigantes trinucleadas e mais tarde placas ou sincícios multinucleados. Estes sincícios têm em consequência uma origem tanto fetal como materna, que criam lugares delimitados nos quais em vez de existir intacta uma camada de epitélio coriônico e outra de epitélio endometrial, encontra-se uma só camada que combina as duas origens. As células gigantes binucleadas migram e mudam seu número ao longo da gestação em forma dinâmica. Este tipo celular é importante porque secretam uma variedade de hormônios. Células gigantes binucleadas aparecem por volta do dia 14 na ovelha e entre os dias 18 e 20 na vaca. Endoteliocorial: 5 camadas. Neste tipo de placentação o córion fetal está em contato direto com o endotélio vascular do endométrio graças à erosão do epitélio e do tecido conectivo endometrial (tecido intersticial) durante a implantação (figura 19 C). De modo que o intercâmbio de substâncias e resíduos só requer atravessar quatro camadas de tecidos. Este tipo de placenta é presente principalmente em cães e felinos. Nota-se nas figuras 19 C e 21 que este tipo de placenta é mais íntimo do que a placenta epiteliocorial porque o epitélio endometrial não existe mais. Hemocorial: 3 camadas (figura 22). Aqui o epitélio coriônico está intacto e entra em contato direto com o sangue materno em regiões onde formam reservatórios de sangue semelhantes a poços (figura 19 D). O intercâmbio de substâncias e resíduos entre a mãe e o feto é mais direto uma vez que é necessário atravessar apenas três camadas para chegar até à circulação fetal. Algumas espécies de primatas, incluindo o ser humano e os roedores possuem este tipo de placentação. MEMBRANAS EXTRAEMBRIONÁRIAS EM AVES Ao mesmo tempo que se estabelece o corpo embrionário e os esboços de cada um dos órgãos começam a gerar-se, torna-se imperioso garantir a sobrevivência do embrião. Tenha-se em conta que nas aves todo o necessário para o desenvolvimento é encontrado no ovo pelo que deve-se reforçar a eficácia das estruturas criadas para garantir o objetivo a que se destina. O exterior é fornecido apenas com o O2; emite CO2 e vapor de água no exterior (perda de 15% da água durante a incubação inicial). Além disso, o neonato não é imaturo, como nos anfíbios, mas está em um estádio maduro juvenil. Como indicado, são quatro as problemáticas a que deve fazer frente o embrião: prover-se de um meio que garanta o desenvolvimento volumétrico, amortecendo os movimentos físicos excessivos que possam traumatizá-lo e evitar a dessecação; assegurar que os nutrientes (vitelo e albúmen) sejam incorporados de forma correta no interior do embrião; assegurar o intercâmbio de gases; e eliminar substâncias tóxicas derivadas do metabolismo proteico. Para atender estas necessidades são desenvolvidas uma série de membranas extrambrionárias que se vão expandindo progressivamente pelo interior do ovo. A dureza da casca e sua relativa impermeabilidade protege-o igualmente da intempérie terrestre. -/- Figura 23: Evolução das membranas extraembrionárias de galinha (3 e 10 dias de incubação). -/- Saco vitelino: o saco vitelino é a primeira membrana extraembrionária em formação. Aparece como consequência direta da gastrulação: as camadas germinativas que se formam ao nível do disco embrionário expandem-se progressivamente contornando o vitelo. Assim, as células provenientes da área opaca (equivalente ao trofoblasto dos mamíferos) migram sobre o vitelo, terminando quase por cobrir, o mesmo ocorre com o endoderma mais internamente, formando-se assim um saco bilaminar. Posteriormente, o mesoderma se interpõe entre ambos, progredindo igualmente no sentido distal, rodeando o endoderma e aderindo-se ao mesmo e ao equivalente de trofoblasto. Ao estabelecer-se o celoma, o saco é constituído pelo endoderma e folha esplâncnica do mesoderma lateral. Este mesoderma vai progredindo no sentido distal e se vasculariza profunda- mente; os vasos distais se anastomosam formando um anel vascular denominado seio terminal, que marca o limite do mesoderma em expansão. Assim, sobre o vitelo é distinguível um área distal não vascularizada (área vitelina) e uma área proximal vascularizada (área vasculosa) que vai ficando progressivamente maior. Ao sexto dia de incubação mais da metade da superfície do vitelo foi envolvido pelo mesoderma. Os nutrientes do vitelo são absorvidos e desdobrados a componentes mais simples por enzimas produzidas pelo endoderma, sendo incorporados aos vasos vitelinos que os veicularão até o coração, que os impulsionará a todo o embrião. Durante a fase embrionária (até ao sexto dia de incubação), o oxigênio do exterior chega até a área vasculosa por difusão, incorporando-se daqui ao embrião; além disso, durante a primeira semana, as alterações na composição e volume do vitelo fazem que se disponha flutuando sobre o albúmen, o que faz com que a área vasculosa fique em contato com a casca, favorecendo-se assim a respiração. O intestino primitivo se instaura a partir das porções mais proximais do saco vitelino à vez que o corpo é fechado (2º-3º dia). O saco vitelino vai regredindo à medida que se vão esgotando os nutrientes do vitelo que aloja. Pouco antes do nascimento é incorporado à cavidade corporal como divertículo vitelino que fica unido ao jejuno; o divertículo vitelino persiste até seis dias após o nascimento, constituindo uma fonte adicional de nutrientes. -/- Figura 24: Feto de galinho ao fim, perto de ser eclodido. -/- mnios: no segundo dia (-30 horas) de incubação se formam as dobras amnióticas na somatopleura extraembrionária, perto do disco embrionário. Progridem dorsalmente, terminando por convergir e fundir-se cerca de 72 horas de incubação, coincidindo com o fechamento corporal, assim sendo constituído o âmnios, que terminará perdendo todo o contato com o córion. A cavidade amniótica que limita está cheia de um líquido seroso que garante que o embrião seja desenvolvido em um meio aquoso; este líquido é secretado pelo âmnios, mas também composto por substâncias formadas pelos rins, cavidade oral e aparelho respiratório. Córion: após a formação do celoma e o estabelecimento e fusão das dobras amnióticas, a parte da somatopleura extraembrionária que fica mais periférica constitui o córion (também denominado serosa nas aves); permanece formada pela área opaca expandida e mesoderma somático. Progressivamente vai aderindo-se à membrana testácea interna deslocando o albúmen; sobre o dia 12 termina por cobrir toda a superfície interna da casca. Intervém na troca gasosa com o meio ambiente através dos poros da casca e na captação do cálcio desta. Alantóides: o alantóide inicia a sua formação no dia 3 de incubação. Cresce rapidamente, ocupando o espaço exocelômico, terminando por cobrir o âmnios e saco vitelino. Progressivamente, entre os dias 4 a 10, sua parte mais externa se funde com o córion, formando-se o alantocórion, membrana trilaminar que cobrirá a superfície interna da casca, aderindo-se à membrana testácea interna, cujo mesoderma (esplâncnico) se vasculariza intensamente. A partir do dia 7 substitui completamente a área vasculosa como órgão respiratório, sendo garantido o aumento gradual das necessidades de troca gasosa na fase fetal do desenvolvimento (desde o dia 8), de rápido crescimento. A capacidade de capilarização desta membrana é muito maior do que a do saco vitelino. Na cavidade alantóica acumula-se a urina produzida pelos rins, afastando os produtos tóxicos do embrião; a membrana também age sobre este fluido intervindo na manutenção do equilíbrio hídrico e mineral do embrião. -/- Figura 25: Formação do saco vitelino. Limite entre a área vascular e avascular. Seio terminal. -/- O albúmen perde água rapidamente e torna-se menos volumoso e mais viscoso, terminando por desaparecer progressivamente. A ligação do alantocórion à membrana testácea interna faz com que seja marginalizado para uma posição periférica, no polo agudo do ovo. Aqui, o alantocórion que o rodeia constitui o saco do albúmen. O albúmen é a principal fonte de água e proteínas. A água é incorporada ao vitelo, o que, ao tornar-se mais volumoso, provoca que, entre os dias 3 e 4, se rompa a membrana vitelina; apenas restos mortais devem permanecer entre o saco vitelino e o albúmen. Dentro do saco vitelino, a água se acumula principalmente sob o embrião -fluido subembrionário-; este fluido atinge o seu volume máximo (15 ml) no dia 6. As proteínas serão incorporadas principalmente a partir de no dia 12, seja através do saco vitelino, do saco do albúmen ou por ingestão de líquido amniótico, dada a comunicação seroamniótica que se estabelece. Na galinha, a eclosão ocorre aos 21 dias de incubação. REFERÊNCIAS BIBLIOGRÁFICAS -/- Anotações de aulas de Embriologia Básica, Prof. Dr. Edson João da Silva, UFRPE, 2021. BAZER, Fuller W. et al. Novel pathways for implantation and establishment and maintenance of pregnancy in mammals. MHR: Basic science of reproductive medicine, v. 16, n. 3, p. 135-152, 2009. CARTER, Anthony M. Evolution of placental function in mammals: the molecular basis of gas and nutrient transfer, hormone secretion, and immune responses. Physiological Reviews, 2012. CARTER, A. M.; ENDERS, A. C. Placentation in mammals: Definitive placenta, yolk sac, and paraplacenta. Theriogenology, v. 86, n. 1, p. 278-287, 2016. CONSTANTINESCU, G.M.; SCHATTEN, H. Comparative reproductive biology. Carlton: Blackwell Publishing, 2007. 402p. Avicultura: Formação do Ovo. Desenvolvimento Embrionário e Diferenciação Sexual nos Animais Domésticos. Disponível em:. Acesso em: Dezembro de 2021. Diferenciação e Determinação Sexual dos Animais. Fisiologia do Ciclo Estral dos Animais Domésticos. Emanuel Isaque Cordeiro da Silva, 2021. Manejo na Avicultura: Postura, Iluminação e Incubação dos Ovos. Transporte de Gametas, Fertilização e Segmentação. FERRER‐VAQUER, Anna; HADJANTONAKIS, Anna‐Katerina. Birth defects associated with perturbations in preimplantation, gastrulation, and axis extension: from conjoined twinning to caudal dysgenesis. Wiley Interdisciplinary Reviews: Developmental Biology, v. 2, n. 4, p. 427-442, 2013. GALINA, Carlos; VALENCIA, Javier. Reproducción de los animales domésticos. 2006. GEISERT, Rodney D.; SPENCER, Thomas E. Placentation in Mammals. Springer, 2021. GINTHER, O. J. Reproductive Biology of The mare: Basic and Applied Aspects. 2. ed. Cross Plains, Wisconsin: Equiservices, 1992. GUILLOMOT, Michel. Cellular interactions during implantation in domestic ruminants. Journal of Reproduction and Fertility-Supplements only, n. 49, p. 39-52, 1995. KLEIN, C.; TROEDSSON, M. H. T. Maternal recognition of pregnancy in the horse: a mystery still to be solved. Reproduction, Fertility and Development, v. 23, n. 8, p. 952-963, 2011. MIGLINO, Maria Angelica et al. The carnivore pregnancy: the development of the embryo and fetal membranes. Theriogenology, v. 66, n. 6-7, p. 1699-1702, 2006. MOFFETT, Ashley; LOKE, Charlie. Immunology of placentation in eutherian mammals. Nature Reviews Immunology, v. 6, n. 8, p. 584-594, 2006. PRETZER, S. D. Canine embryonic and fetal development: A review. Theriogenology, v. 70, n. 3, p. 300-303, 2008. SENGER, Phillip L. et al. Pathways to pregnancy and parturition. Current Conceptions, Inc., 1615 NE Eastgate Blvd., 2012. SOZEN, Berna; CAN, Alp; DEMIR, Necdet. Cell fate regulation during preimplantation development: a view of adhesion-linked molecular interactions. Developmental biology, v. 395, n. 1, p. 73-83, 2014. SPENCER, Thomas E. et al. Pregnancy recognition and conceptus implantation in domestic ruminants: roles of progesterone, interferons and endogenous retroviruses. Reproduction, fertility and development, v. 19, n. 1, p. 65-78, 2006. VERSTEGEN-ONCLIN, K.; VERSTEGEN, J. Endocrinology of pregnancy in the dog: a review. Theriogenology, v. 70, n. 3, p. 291-299, 2008. WOODING, Peter; BURTON, Graham. Comparative placentation: structures, functions and evolution. Springer Science & Business Media, 2008. FIXAÇÃO DO ASSUNTO -/- 1. Defina e diferencie os processos de desenvolvimento embrionário precoce, alonga- mento e gastrulação. -/- 2. O que é implantação? Caracterize as fases do processo de implantação. -/- 3. Qual a importância do acúmulo de líquido no interior do blastocele? Qual a importân- cia da eclosão do blastocisto? -/- 4. Caracterize os três tipos de implantação e, depois, explique e diferencie os meios de implantação nas fêmeas domésticas. -/- 5. Defina e caracterize os meios de reconhecimento materno da gestação (RMG) nos animais domésticos. -/- 6. O que diferencia o RMG em ruminantes e suínos? -/- 7. Qual o papel do estradiol no RMG em porcas? O que ocorre quando a porca não fica gestante? -/- 8. Explique o RMG em cães e gatos. -/- 9. Defina placentação e sua importância para a reprodução dos animais domésticos. -/- 10. Quais são as classificações da placentação? Classifique a placentação das fêmeas domésticas. -/- 11. Caracterize e diferencie o processo de placentação em fêmeas domésticas. -/- 12. Observe a figura e responda o que se pede:. (shrink)

Tech companies have eagerly utilised mindfulness techniques in order to increase both creativity and productivity among their managers and employees. However, while a growing number of studies within fields of clinical psychology and psychiatry suggest that mindfulness provides myriad health benefits, such literature does not critically evaluate the societal and affective influences of mindfulness and other wellness practices on working bodies. By focusing on discourses related to mindfulness training, this paper explores the conception of ‘being present’. Drawing on the phenomenology (...) of the body, affect theory, and critical mindfulness studies, we develop a new theoretical framework for analysing mindfulness as a somatic and social force in technology-driven business contexts. Using research material drawn from the online advertising of mindfulness programmes for managers, this paper describes ‘presence’ as a new labour concept associated with the cultivated performance skill of the managerial body in the era of late capitalism. We conclude that mindfulness training – transforming the somatic into an affective investment – has transformed Buddhist meditation into capital that can be bought and consumed. (shrink)

The impermanence of human affairs is a major theme in Spinoza’s discussions of political histories, and from our present-day perspective it is both intriguing and ironic to see how this very theme has played out in the evolving fate of Spinoza’s association with atheism. While Spinoza’s contemporaries charged him with atheism in order to impugn his philosophy (and sometimes his character), in our times many lay readers and some scholars portray Spinoza as an atheist in order to commemorate his (...) role as a founder of modern secularism. In this paper, I will argue that Spinoza deserves neither vilification nor praise for being an atheist, for the simple reason that he was not one (unless one employs the term ‘atheism’ in a very peculiar sense). I have chosen the current topic as my contribution to a volume focused on the TTP, the Ethics, and their interrelations because it is precisely these two books which brought about the common reactionary accusation of atheism by Spinoza’s contemporaries. Addressing Spinoza’s 1663 book, Descartes’ Principles of Philosophy, Bayle writes: “Spinoza appears as orthodox in that book about the nature of God.” As we shall shortly see, Descartes too was accused of atheism by some of his contemporaries (though not so by Bayle). The latter designates his target quite explicitly: “[Spinoza’s] Tractatus Theologico Politicus, printed in Amsterdam, in the year 1670, is a pernicious and execrable book which contains all the seeds of the Atheism he plainly discovered in his Opera Posthuma.” François Lamy, in his 1696 Le nouvel athéisme renversé, also focused on the Ethics and the TTP in his attack on Spinoza’s atheism. Bayle’s reference to the Opera Posthuma is ostensibly targeting the Ethics at least primarily, if not uniquely. Even the most suspicious and distrustful mind would have to labor hard in order to find atheism in the Hebrew Grammar, or even in the Tractatus Politicus where Spinoza argues that it is not within the power, and hence right, of the commonwealth to induce people to adopt utterly absurd beliefs, such as “that the whole is greater than its part or that God does not exist.” The TTP and the Ethics are the works where Spinoza launches his merciless attack on anthropocentric thinking and anthropomorphic religion. Spinoza’s panentheism (“quicquid est, in Deo est”) constitutes the metaphysical foundation of the Ethics, and it is repeatedly and clearly alluded to in the TTP. Since it is these two elements – (1) Spinoza’s open assertions of panentheism and (2) his critique of andromorphic conceptions of God – which are the historical grounds for the atheism charge, it seems natural that the merit of this charge should be decided primarily by examination of these two foundational works. I will proceed in the following manner. In the first part of the paper, we will make our first acquaintance with the imputation of atheism by Spinoza’s contemporaries and Spinoza’s response to the charge (or lack thereof). In the second part, I discuss three broad strategies, or hermeneutic avenues, that have been pursued to impute atheism to Spinoza. The first of the three was dominant in Spinoza’s time, while the latter two were employed more recently. These strategies are not mutually exclusive and we can find occasionally various combinations of different shades of these three strategies. In this part, I will also raise some preliminary questions about the cogency of the hermeneutics employed by each strategy. In the third and fourth parts of the paper, I will discuss a small selection of key texts from the Ethics and the TTP, respectively, and argue that the atheist readings fail to make sense of these key passages (unless one adopts an extreme hermeneutics of suspicion which could allegedly find any view harbored in any text). Let me stress that this selection of passages is far from comprehensive, and that dozens of other passages can be adduced to establish the very same point. I hope by the end of the fourth part to convince the reader of the deep problems besetting the atheist readings. In the fifth and last part, I show that both panentheism and the critique of anthropomorphic religion and anthropomorphic conceptions of providence were quite common within rabbinic discourse. Thus, I will argue that if we are not in the business of announcing that both Maimonides and the Kabbalists were atheists, we should avoid the same imputation to Spinoza. Underlying my argument in this final part is the claim that at least some perceptions of Spinoza as an atheist are instances of what could be termed conceptual colonialism, i.e. the enforcement of the categories of a hegemonic culture (in this case, Western Christianity ) on minority cultures (in the current case, rabbinic Judaism). To be clear, this attitude need not be motivated by ill intentions or racism. It is always tempting and easy to explain the unfamiliar through the familiar, but conceptual stagnation and insistence on imposing the categories of the familiar on other cultures may quickly lead to deep distortion and blindness, despite one’s best intentions. Unless one is exceedingly careful to avoid the – completely natural – temptation to impose one’s own categories on a foreign culture (and to look for the coin only under the street light), one is likely to end up with distorted conceptions of the relevant alien culture, despite one’s best intentions. (shrink)

Semantic interoperability can be defined as the ability of two or more computer systems to exchange information in such a way that the meaning of that information can be automatically interpreted by the receiving system accurately enough to produce useful results to the end users of both systems. Several activities are currently being performed by a variety of stakeholders to achieve semantic interoperability in healthcare. Many of these activities are not beneficial, because they place too great a focus on (...) class='Hi'>business aspects and not enough on involvement of the right sorts of researchers, in particular those that are able to see how the data and information relate to the entities of concern on the side of the patient. The lack of a central focus on the patient, and the associated focus on ‘concepts’, have spawned a variety of mutually incompatible terminologies exhibiting non-resolvable overlap. The predominance of the healthcare IT industry in the writing and selection of semantic interoperability standards mitigates against the benefits that standards, when well designed, can bring about. (shrink)

The integration of cloud architecture into Human Capital Management (HCM) systems has revolutionized the way organizations manage their workforce. Cloud-based HCM solutions offer enhanced scalability, flexibility, and accessibility, enabling organizations to streamline HR processes, improve data management, and foster greater employee engagement. This paper explores the impact of cloud architecture on HCM processes, highlighting key benefits such as cost-effectiveness, real-time data access, and seamless integration with other business systems. Through a comprehensive literature review and analysis of case studies from (...) diverse industries, the study demonstrates how cloud-based HCM systems optimize talent acquisition, performance management, learning and development, and workforce analytics. Additionally, the research addresses the challenges associated with transitioning to cloud-based HCM solutions, including data security, privacy concerns, and change management. Best practices for implementing cloud architecture in HCM are discussed, emphasizing the importance of strategic planning, stakeholder engagement, and continuous evaluation. The findings underscore the pivotal role of cloud architecture in enhancing organizational efficiency, agility, and competitive advantage in today’s dynamic business environment. (shrink)

Overpopulation, Continuous Economic Growth, and the Unfeasibility of Supply-Side Economics -/- The concepts of overpopulation, continuous economic growth, and supply-side economics have been at the forefront of societal and economic discussions for decades. While these ideas may seem appealing in the short term, their long-term sustainability is questionable and ultimately self-destructive. Overpopulation and continuous economic growth both strain natural resources, disrupt ecological balances, and create unsustainable pressures on society. Furthermore, the idea that supply-side economics—the notion that reducing taxes and increasing (...) production can stimulate the economy—succeeds in isolation fails to account for the systemic imbalance it perpetuates. In this essay, we will explore why overpopulation and continuous economic growth are not sustainable and how the supply-side model is essentially the slave of the total demand side. -/- Overpopulation: A Growing Strain on Resources -/- Overpopulation is one of the most pressing challenges the world faces today. As the global population continues to rise, it increases demand for food, water, energy, and land—resources that are finite. The Earth’s carrying capacity is not infinite, and the strain on natural ecosystems is accelerating at an alarming rate. Forests are cleared for agricultural expansion, oceans are overfished, and landfills overflow with waste. These actions not only degrade the environment but also threaten biodiversity, which is critical to the survival of ecosystems and, ultimately, humanity itself. -/- In a world of limited resources, an ever-growing population leads to resource depletion, escalating inequality, and environmental destruction. When the demand for resources surpasses the ability of the environment to regenerate, societies face increasing competition for these resources, which can lead to conflict, famine, and a breakdown of social order. Overpopulation, when paired with unsustainable consumption patterns, exacerbates the environmental footprint of humanity. Thus, overpopulation is not only unsustainable in terms of resource availability but also threatens the stability of global ecosystems, making the current trajectory unsustainable. -/- Continuous Economic Growth: A Flawed Paradigm -/- Continuous economic growth, often seen as a key indicator of societal success, is another concept that fails to consider long-term sustainability. Economic growth is typically measured through Gross Domestic Product (GDP), which focuses on output and production. However, GDP does not account for the depletion of natural resources, the degradation of ecosystems, or the social and environmental costs of growth. The relentless pursuit of economic expansion often leads to overexploitation of resources, pollution, and societal inequalities. -/- The idea that economic growth can continue indefinitely on a finite planet is fundamentally flawed. Economists often argue that technological advancements or innovations will offset the pressures of growth by creating more efficient systems. While this may be true to some extent, technology cannot fully replace the finite resources that are essential for production. Moreover, the increasing energy demands associated with growth contribute to environmental degradation, including climate change. A growing population with a growing economy leads to growing consumption, which in turn accelerates environmental degradation. Therefore, continuous economic growth is unsustainable because it disregards the ecological limits of the planet. -/- Supply-Side Economics: A Flawed Foundation -/- Supply-side economics posits that reducing taxes, particularly for corporations and the wealthy, will stimulate investment, boost production, and ultimately benefit the economy as a whole. This model, however, assumes that economic benefits will “trickle down” from the wealthy and businesses to the rest of society. In practice, supply-side economics has led to wealth concentration, growing income inequality, and little evidence that it creates widespread prosperity. -/- The underlying flaw of the supply-side model is its failure to recognize that the demand side of the economy is just as important as the supply side. In reality, economic growth is driven not only by the availability of goods and services but also by consumer demand. Without demand, there is no need for supply—businesses cannot sell products and services if people cannot afford them or are not incentivized to purchase them. Therefore, while supply-side policies may increase production in the short term, they do not address the root causes of inequality or the need for demand-driven growth. -/- Furthermore, supply-side economics often disregards the negative consequences of unfettered production, such as environmental degradation. By focusing solely on increasing supply and reducing government regulation, it exacerbates the ecological strain caused by continuous growth. As businesses prioritize profits, they are incentivized to exploit resources unsustainably, perpetuating the environmental crises associated with overpopulation and unchecked growth. -/- A Holistic Approach to Sustainability -/- To achieve sustainability, a shift away from the traditional paradigms of overpopulation, continuous economic growth, and supply-side economics is necessary. A more balanced approach, which emphasizes responsible consumption, equitable distribution of resources, and ecological preservation, is essential. The focus must shift from growth for the sake of growth to fostering a steady-state economy that works within the Earth’s ecological limits. -/- Education, innovation, and responsible governance will play key roles in transitioning toward a sustainable future. For example, adopting policies that focus on reducing inequality, investing in renewable energy, and promoting sustainable agricultural practices can help mitigate the adverse effects of overpopulation and growth. Similarly, instead of focusing solely on supply-side policies, governments should prioritize strategies that foster demand through wage growth, universal healthcare, and the reduction of poverty. Only by acknowledging the interconnectedness of economic, social, and environmental factors can we hope to create a sustainable future. -/- Conclusion -/- Overpopulation, continuous economic growth, and supply-side economics are unsustainable models in the long run. They fail to consider the limits of our natural resources and the social and environmental consequences of unchecked expansion. A shift toward sustainable practices, responsible consumption, and policies that address both the supply and demand sides of the economy is crucial. Without this shift, the world will continue to face growing challenges that threaten not only our environment but also the stability of society itself. The pursuit of sustainable solutions is not a luxury; it is an imperative for the survival and well-being of future generations. -/- . (shrink)