Results for 'Membrane hemifusion'

38 found
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  1. A pressure-reversible cellular mechanism of general anesthetics capable of altering a possible mechanism of consciousness.Kunjumon Vadakkan - 2015 - Springerplus 4:1-17.
    Different anesthetics are known to modulate different types of membrane-bound receptors. Their common mechanism of action is expected to alter the mechanism for consciousness. Consciousness is hypothesized as the integral of all the units of internal sensations induced by reactivation of inter-postsynaptic membrane functional LINKs during mechanisms that lead to oscillating potentials. The thermodynamics of the spontaneous lateral curvature of lipid membranes induced by lipophilic anesthetics can lead to the formation of non-specific inter-postsynaptic membrane functional LINKs by (...)
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  2. Elastic Membrane Based Model of Human Perception.Alexander Egoyan - 2011 - Toward a Science of Consciousness.
    Undoubtedly the Penrose-Hameroff Orch OR model may be considered as a good theory for describing information processing mechanisms and holistic phenomena in the human brain, but it doesn’t give us satisfactory explanation of human perception. In this work a new approach explaining our perception is introduced, which is in good agreement with Orch OR model and other mainstream science theories such as string theory, loop quantum gravity and holographic principle. It is shown that human perception cannot be explained in the (...)
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  3. Membrane Computing: from biology to computation and back.Paolo Milazzo - 2014 - Isonomia: Online Philosophical Journal of the University of Urbino:1-15.
    Natural Computing is a field of research in Computer Science aimed at reinterpreting biological phenomena as computing mechanisms. This allows unconventional computing architectures to be proposed in which computations are performed by atoms, DNA strands, cells, insects or other biological elements. Membrane Computing is a branch of Natural Computing in which biological phenomena of interest are related with interactions between molecules inside cells. The research in Membrane Computing has lead to very important theoretical results that show how, in (...)
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  4. Anatomy of Peritoneal Membrane and its Function.Shamima Parvin Lasker - 2015 - Preceding of 3rd Annual Conference and Scientific Seminar 3:12.
    The peritoneum is the largest serous membrane in the body that covers the inner side of the abdominal wall and reflects over the abdominal viscera. Though the visceral peritoneum accounts for roughly four-fifth of the total surface area of the membrane, but the parietal peritoneum is the more important for peritoneal dialysis. Between the parietal and visceral layer of peritoneum there is potential space called peritoneal cavity, contain small amount of serous fluid. If dialysates remain more or less (...)
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  5. Widespread Membrane Potential Changes and Cardiorespiratory Synchonization Involved in Anxiety and Sleep-Wake Transitions.Jerath Ravinder, Shannon M. Cearley & Mike Jensen - 2016 - Journal of Biological Regulators and Homeostatic Agents 30 (4):935-944.
    Located within the ascending reticular activating system are nuclei which release neurotransmitters such as acetylcholine, serotonin, dopamine, and norepinephrine. These nuclei have widespread projections that extend into the limbic system and throughout cortex. Activation of these neurotransmitters during awake states leads to arousal, while inhibition leads to the loss of consciousness experienced during slow-wave sleep. Previously, we proposed a mechanism in which cardiorespiratory synchronization may underlie the widespread hyperpolarization that occurs throughout the brain during slow-wave sleep. We further propose that (...)
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  6. The Artificial Cell, the Semipermeable Membrane, and the Life that Never Was, 1864–1901.Daniel Liu - 2019 - Historical Studies in the Natural Sciences 49 (5):504-555.
    Since the early nineteenth century a membrane or wall has been central to the cell’s identity as the elementary unit of life. Yet the literally and metaphorically marginal status of the cell membrane made it the site of clashes over the definition of life and the proper way to study it. In this article I show how the modern cell membrane was conceived of by analogy to the first “artificial cell,” invented in 1864 by the chemist Moritz (...)
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  7. Effect of Oxygen Consumption of Thylakoid Membranes (Chloroplasts) From Spinach after Inhibition Using JNN.Hisham Ziad Belbeisi, Youssef Samir Al-Awadi, Muhammad Munir Abbas & Samy S. Abu-Naser - 2020 - International Journal of Academic Health and Medical Research (IJAHMR) 4 (11):1-7.
    Abstract: In this research, an Artificial Neural Network (ANN) model was developed and tested to predict effect of oxygen consumption of thylakoid membranes (chloroplasts) from spinach after inhibition. A number of factors were identified that may affect of oxygen consumption of thylakoid membranes from spinach. Factors such as curve, herbicide, dose, among others, as input variables for the ANN model. A model based on multi-layer concept topology was developed and trained using the data from some inhibition of photosynthesis in farms. (...)
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  8. The Dynamic Role of Breathing and Cellular Membrane Potentials in the Experience of Consciousness.Jerath Ravinder, Shannon M. Cearley, Vernon A. Barnes & Santiago Junca - 2017 - World Journal of Neuroscience 7:66-81.
    Understanding the mechanics of consciousness remains one of the most important challenges in modern cognitive science. One key step toward understanding consciousness is to associate unconscious physiological processes with subjective experiences of sensory, motor, and emotional contents. This article explores the role of various cellular membrane potential differences and how they give rise to the dynamic infrastructure of conscious experience. This article explains that consciousness is a body-wide, biological process not limited to individual organs because the mind and body (...)
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  9.  71
    Framework of Consciousness from Semblance of Activity at Functionally LINKed Postsynaptic Membranes.Kunjumon I. Vadakkan - 2010 - Frontiers in Psychology 1.
    Consciousness is seen as a difficult “binding” problem. Binding, a process where different sensations evoked by an item are associated in the nervous system, can be viewed as a process similar to associative learning. Several reports that consciousness is associated with some form of memory imply that different forms of memories have a common feature contributing to consciousness. Based on a proposed synaptic mechanism capable of explaining different forms of memory, we developed a framework for consciousness. It is based on (...)
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  10. Explanation of Qualia and Self-Awareness Using Elastic Membrane Concept.Alexander Egoyan - 2017 - General Science Journal 2:10-16.
    In this work we show that our self-awareness and perception may be successfully explained using two dimensional holistic structures with closed topology embedded into our brains - elastic membranes. These membranes are able to preserve their structure during conscious processes. Their elastic oscillations may be associated with our perceptions, where the frequency of the oscillations is responsible for the perception of different colors, sounds and other stimuli, while the amplitude of the oscillations is responsible for the feeling of a distance. (...)
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  11. Framework of consciousness from semblance of activity at functionally LINKed postsynaptic membranes.Kunjumon Vadakkan - 2010 - Frontiers in Consciousness Research 1 (1):1-12.
    Consciousness is seen as a difficult “binding” problem. Binding, a process where different sensations evoked by an item are associated in the nervous system, can be viewed as a process similar to associative learning. Several reports that consciousness is associated with some form of memory imply that different forms of memories have a common feature contributing to consciousness. Based on a proposed synaptic mechanism capable of explaining different forms of memory, we developed a framework for consciousness. It is based on (...)
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  12.  73
    Anti-phospholipase A2 Receptor Antibody Measurement in Patients with Idiopathic Membranous Nephropathy Diagnosed by Renal Biopsy.Sadettin Öztürk, Ozlem Usalan, Celalettin Usalan & Orhan Ozdemir - 2023 - European Journal of Therapeutics 29 (2):116-122.
    Objective: Our study is a cross-sectional study that aims to evaluate the presence and levels of anti-phospholipase A2 receptor (PLA2R) antibodies in healthy volunteers and idiopathic membranous nephropathy (IMN) patients and to assess the relationship between these levels and clinical parameters. -/- Methods: Serum anti-PLA2R antibody levels, complete blood count, urea, creatinine (Kre), total protein,albumin, low-density lipoprotein (LDL)-cholesterol, triglycerides (TG), high-density lipoprotein (HDL)-cholesterol, total cholesterol, C-reactive protein (crp), sedimentation, proteinuria were measured from 71 IMN patients and 48 healthy volunteers. -/- (...)
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  13. Framework of consciousness from semblance of activity at functionally LINKed postsynaptic membranes. Vadakkan - 2010 - Frontiers in Conssciousness Research 1 (1):1-12.
    Consciousness is seen as a difficult “binding” problem. Binding, a process where different sensations evoked by an item are associated in the nervous system, can be viewed as a process similar to associative learning. Several reports that consciousness is associated with some form of memory imply that different forms of memories have a common feature contributing to consciousness. Based on a proposed synaptic mechanism capable of explaining different forms of memory, we developed a framework for consciousness. It is based on (...)
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  14. Self-Regulation of Breathing as a Primary Treatment for Anxiety.Jerath Ravinder, Molly W. Crawford, Vernon A. Barnes & Kyler Harden - 2015 - Applied Pscyophysiology and Biofeedback 40:107-115.
    Understanding the autonomic nervous system and homeostatic changes associated with emotions remains a major challenge for neuroscientists and a fundamental prerequisite to treat anxiety, stress, and emotional disorders. Based on recent publications, the inter-relationship between respiration and emotions and the influence of respiration on autonomic changes, and subsequent widespread membrane potential changes resulting from changes in homeostasis are discussed. We hypothesize that reversing homeostatic alterations with meditation and breathing techniques rather than targeting neurotransmitters with medication may be a superior (...)
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  15. The informational nature of personal identity.Luciano Floridi - 2011 - Minds and Machines 21 (4):549-566.
    In this paper, I present an informational approach to the nature of personal identity. In “Plato and the problem of the chariot”, I use Plato’s famous metaphor of the chariot to introduce a specific problem regarding the nature of the self as an informational multiagent system: what keeps the self together as a whole and coherent unity? In “Egology and its two branches” and “Egology as synchronic individualisation”, I outline two branches of the theory of the self: one concerning the (...)
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  16. The molecular vista: current perspectives on molecules and life in the twentieth century.Mathias Grote, Lisa Onaga, Angela N. H. Creager, Soraya de Chadarevian, Daniel Liu, Gina Surita & Sarah E. Tracy - 2021 - History and Philosophy of the Life Sciences 43 (1):1-18.
    This essay considers how scholarly approaches to the development of molecular biology have too often narrowed the historical aperture to genes, overlooking the ways in which other objects and processes contributed to the molecularization of life. From structural and dynamic studies of biomolecules to cellular membranes and organelles to metabolism and nutrition, new work by historians, philosophers, and STS scholars of the life sciences has revitalized older issues, such as the relationship of life to matter, or of physicochemical inquiries to (...)
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  17. Three overlooked key functional classes for building up minimal synthetic cells.Antoine Danchin - 2021 - Synthetic Biology 6 (1):ysab010.
    Assembly of minimal genomes revealed many genes encoding unknown functions. Three overlooked functional categories account for some of them. Cells are prone to make errors and age. As a first key function, discrimination between proper and changed entities is indispensable. Discrimination requires management of information, an authentic, yet abstract, cur- rency of reality. For example proteins age, sometimes very fast. The cell must identify, then get rid of old proteins without destroying young ones. Implementing discrimination in cells leads to the (...)
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  18. Should Pediatric Patients Be Prioritized When Rationing Life-Saving Treatments During the COVID-19 Pandemic.Ryan M. Antiel, Farr A. Curlin, Govind Persad, Douglas B. White, Cathy Zhang, Aaron Glickman, Ezekiel J. Emanuel & John Lantos - 2020 - Pediatrics 146 (3):e2020012542.
    Coronavirus disease 2019 can lead to respiratory failure. Some patients require extracorporeal membrane oxygenation support. During the current pandemic, health care resources in some cities have been overwhelmed, and doctors have faced complex decisions about resource allocation. We present a case in which a pediatric hospital caring for both children and adults seeks to establish guidelines for the use of extracorporeal membrane oxygenation if there are not enough resources to treat every patient. Experts in critical care, end-of-life care, (...)
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  19. Research ethics: Ethics and methods in surgical trials.C. Ashton, N. Wray, A. Jarman, J. Kolman & D. Wenner - 2009 - Journal of Medical Ethics 35 (9):579-583.
    This paper focuses on invasive therapeutic procedures, defined as procedures requiring the introduction of hands, instruments, or devices into the body via incisions or punctures of the skin or mucous membranes performed with the intent of changing the natural history of a human disease or condition for the better. Ethical and methodological concerns have been expressed about studies designed to evaluate the effects of invasive therapeutic procedures. Can such studies meet the same standards demanded of those, for example, evaluating pharmaceutical (...)
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  20.  79
    Involuntary Withdrawal: A Bridge Too Far?Joanna Smolenski - 2023 - Clinical Ethics Case Studies, Hastings Bioethics Forum.
    RD, a 32-year-old male, was admitted to the hospital with hypoxic COVID pneumonia–a potentially life-threatening condition characterized by dangerously low levels of oxygen in the body- during one of the pandemic’s surges. While RD’s age gave the clinical team hope for his prognosis, his ability to recover was complicated by his being unvaccinated and having multiple comorbidities, including diabetes and obesity. His condition worsened to the point that he required extracorporeal membrane oxygenation (ECMO), a machine that maintains the functioning (...)
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  21. Substantive nature of sleep in updating the temporal conditions necessary for inducing units of internal sensations.Kunjumon Vadakkan - 2016 - Sleep Science 9.
    Unlike other organs that operate continuously, such as the heart and kidneys, many of the operations of the nervous system shut down during sleep. The evolutionarily conserved unconscious state of sleep that puts animals at risk from predators indicates that it is an indispensable integral part of systems operation. A reasonable expectation is that any hypothesis for the mechanism of the nervous system functions should be able to provide an explanation for sleep. In this regard, the semblance hypothesis is examined. (...)
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  22. A framework for the first‑person internal sensation of visual perception in mammals and a comparable circuitry for olfactory perception in Drosophila.Kunjumon Vadakkan - 2015 - Springerplus 4 (833):1-23.
    Perception is a first-person internal sensation induced within the nervous system at the time of arrival of sensory stimuli from objects in the environment. Lack of access to the first-person properties has limited viewing perception as an emergent property and it is currently being studied using third-person observed findings from various levels. One feasible approach to understand its mechanism is to build a hypothesis for the specific conditions and required circuit features of the nodal points where the mechanistic operation of (...)
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  23. The Role of Physics in Science Integration.Alexander Egoyan - 2005 - Albert Einstein Century International Conference.
    Special and General theories of relativity may be considered as the most significant examples of integrative thinking. From these works we see that Albert Einstein attached great importance to how we understand geometry and dimensions. It is shown that physics powered by the new multidimensional elastic geometry is a reliable basis for science integration. Instead of searching for braneworlds (elastic membranes - EM) in higher dimensions we will start by searching them in our 3+1 dimensional world. The cornerstone of the (...)
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  24. Supporting abstract relational space-time as fundamental without doctrinism against emergence.Sascha Vongehr - manuscript
    The present paper aims to contribute to the substantivalism versus relationalism debate and to defend general relativity (GR) against pseudoscientific attacks in a novel, especially inclusive way. This work was initially motivated by the desire to establish the incompatibility of any ether theories with accelerated cosmic expansion and inflation (motto: where would a hypothetical medium supposedly come from so fast?). The failure of this program is of interest for emergent GR concepts in high energy particle physics. However, it becomes increasingly (...)
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  25. Zinc deficiency induces apoptosis via mitochondrial p53- and caspase-dependent pathways in human neuronal precursor cells. James - 2014 - Journal of Trace Elements in Medicine and Biology 59 (65).
    Previous studies have shown that zinc deficiency leads to apoptosis of neuronal precursor cells in vivo and in vitro. In addition to the role of p53 as a nuclear transcription factor in zinc deficient cultured human neuronal precursors (NT-2), we have now identified the translocation of phosphorylated p53 to the mitochondria and p53-dependent increases in the pro-apoptotic mitochondrial protein BAX leading to a loss of mitochondrial membrane potential as demonstrated by a 25% decrease in JC-1 red:green fluorescence ratio. Disruption (...)
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  26. Affine geometry, visual sensation, and preference for symmetry of things in a thing.Birgitta Dresp-Langley - 2016 - Symmetry 127 (8).
    Evolution and geometry generate complexity in similar ways. Evolution drives natural selection while geometry may capture the logic of this selection and express it visually, in terms of specific generic properties representing some kind of advantage. Geometry is ideally suited for expressing the logic of evolutionary selection for symmetry, which is found in the shape curves of vein systems and other natural objects such as leaves, cell membranes, or tunnel systems built by ants. The topology and geometry of symmetry is (...)
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  27. Consciousness is Quantum Computed Beyond the Limits of the Brain: A Perspective Conceived from Cases Studied for Hydranencephaly.Contzen Pereira - unknown
    Hydranencephaly is a developmental malady, where the cerebral hemispheres of the brain are reduced partly or entirely too membranous sacs filled with cerebrospinal fluid. Infants with this malady are presumed to have reduced life expectancy with a survival of weeks to few years and which solely depends on care and fostering of these individuals. During their life span these individuals demonstrate behaviours that are termed “vegetative” by neuroscientists but can be comparable to the state of being “aware” or “conscious”. Based (...)
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  28. MIND-BODY RESPONSE AND NEUROPHYSIOLOGICAL CHANGES DURING STRESS AND MEDITATION: CENTRAL ROLE OF HOMEOSTASIS.Jerath Ravinder, Vernon A. Barnes & Molly W. Crawford - 2014 - Journal of Biological Regulators and Homeostatic Agents 28 (4):545-554.
    Stress profoundly impacts quality of life and may lead to various diseases and conditions. Understanding the underlying physiological and neurological processes that take place during stress and meditation techniques may be critical for effectively treating stress-related diseases. The article examines a hypothetical physiological homeostatic response that compares and contrasts changes in central and peripheral oscillations during stress and meditation, and relates these to changes in the autonomic system and neurological activity. The authors discuss how cardiorespiratory synchronization, which occurs during the (...)
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  29. Consciousness, Origins.Gregory Nixon - 2016 - In Harold L. Miller Jr (ed.), The SAGE Encyclopedia of Theory in Psychology. Thousand Oaks, CA, USA: Sage Publications. pp. 172-176.
    To explain the origin of anything, we must be clear about that which we are explaining. There seem to be two main meanings for the term consciousness. One might be called open in that it equates consciousness with awareness and experience and considers rudimentary sensations to have evolved at a specific point in the evolution of increasing complexity. But certainly the foundation for such sensation is a physical body. It is unclear, however, exactly what the physical requirements are for a (...)
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  30. Estabelecimento da Gestação nos Animais.Emanuel Isaque Cordeiro da Silva - manuscript
    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 (...)
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  31. Widespread depolarization during expiration: A source of respiratory drive?Jerath Ravinder, Molly W. Crawford, Vernon A. Barnes & Kyler Harden - 2014 - Medical Hypotheses 84 (1):31-37.
    Respiration influences various pacemakers and rhythms of the body during inspiration and expiration but the underlying mechanisms are relatively unknown. Understanding this phenomenon is important, as breathing disorders, breath holding, and hyperventilation can lead to significant medical conditions. We discuss the physiological modulation of heart rhythm, blood pressure, sympathetic nerve activity, EEG, and other changes observed during inspiration and expiration. We also correlate the intracellular mitochondrial respiratory metabolic processes with real-time breathing and correlate membrane potential changes with inspiration and (...)
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  32. How lateral inhibition and fast retinogeniculo-cortical oscillations create vision: A new hypothesis.Jerath Ravinder, Shannon M. Cearley, Vernon A. Barnes & Elizabeth Nixon-Shapiro - 2016 - Medical Hypotheses 96:20-29.
    The role of the physiological processes involved in human vision escapes clarification in current literature. Many unanswered questions about vision include: 1) whether there is more to lateral inhibition than previously proposed, 2) the role of the discs in rods and cones, 3) how inverted images on the retina are converted to erect images for visual perception, 4) what portion of the image formed on the retina is actually processed in the brain, 5) the reason we have an after-image with (...)
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  33. Heads and Tails: Molecular Imagination and the Lipid Bilayer, 1917–1941.Daniel Liu - 2018 - In Karl Matlin, Jane Maienschein & Manfred Laubichler (eds.), Visions of Cell Biology: Reflections Inspired by Cowdry's General Cytology. University of Chicago Press. pp. 209-245.
    Today, the lipid bilayer structure is nearly ubiquitous, taken for granted in even the most rudimentary introductions to cell biology. Yet the image of the lipid bilayer, built out of lipids with heads and tails, went from having obscure origins deep in colloid chemical theory in 1924 to being “obvious to any competent physical chemist” by 1935. This chapter examines how this schematic, strictly heuristic explanation of the idea of molecular orientation was developed within colloid physical chemistry, and how the (...)
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  34. The consciousness experiment.Juan Arellano Vega - 2022 - Neuroquantology 20 (2):165-167.
    Since John Von Neumann's proposition in 1932 of a relationship between quantum mechanics and the brain, different perspectives and proposals have evolved (Tarlaci, 2010). Hu & Wu (2006) point out that the seat of consciousness would be the spin within the membranes of neurons and proteins in the brain. Sieb (2016) applied the theory of relativity to spatiotemporal consciousness and found correlations with aspects of brain functioning. Another suggestion is that consciousness emerges because of the Orchestrated Objective Reduction in microtubules (...)
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  35. Sensory Systems as Cybernetic Systems that Require Awareness of Alternatives to Interact with the World: Analysis of the Brain-Receptor Loop in Norwich's Entropy Theory of Perception.Lance Nizami - 2009 - Proceedings of the 2009 IEEE International Conference on Systems, Man, and Cybernetics. San Antonio, TX.
    Introduction & Objectives: Norwich’s Entropy Theory of Perception (1975 [1] -present) stands alone. It explains many firing-rate behaviors and psychophysical laws from bare theory. To do so, it demands a unique sort of interaction between receptor and brain, one that Norwich never substantiated. Can it now be confirmed, given the accumulation of empirical sensory neuroscience? Background: Norwich conjoined sensation and a mathematical model of communication, Shannon’s Information Theory, as follows: “In the entropic view of sensation, magnitude of sensation is regarded (...)
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  36. Innards of Ingarden: Physiology of Time.Virgil W. Brower - 2020 - In Dominika Czakon, Natalia Anna Michna & Leszek Sosnowski (eds.), Roman Ingarden and His Times. Kraków, Poland: pp. 25-42.
    This project begins with the selective sensory experience suggested by lngarden followed by an insensitivity he insinuates to digestive processes. This is juxtaposed with an oenological explanation of phenomenal sedimentation offered by Jean-Luc Marion. It compares the dynamics of time in the former with the those of wine in the latter. Emphasis is given to lngarden's insinuation of time as fluid, liquid, or aquatic. It revisits Ingarden's physiological explanations of partially-open systems by way of the bilateral excretion and absorption of (...)
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  37. Leaf Extract of Eupatorium adenophorum negatively Regulates Growth of Alternanthera philoxeroides.Huabao Chen, Chunping Yang, Kai Shu, Wenming Wang, Zhaojun Li, Guoshu Gong & Min Zhang - manuscript
    Allelopathy is an important biological phenomenon in exotic plant invasions. Studies about this phenomenon can help us to understand how plant interactions influence plant colony and ecosystem functioning. Both alligator weed (Alternanthera philoxeroides, Ap) and crofton weed (Eupatorium adenophorum, Ea) are important destructive exotic species in China. Their allelopathic effects on native plant species are well documented. However, whether alligator weed and crofton weed antagonize each other regarding plant growth? There is largely unknown currently. Here we report that the leaf (...)
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  38.  62
    Serum lmmunglobulin and Complement Levels in the Patients With Head and Neck Carcinoma and the Evaluation of Autoantibody Positivity Rate.Sabri Güngör, Hüseyin Gün & Yalçın Özkaptan - 1990 - European Journal of Therapeutics 1 (1):4-12.
    Serum lmmunglobulin and Complement Levels in the Patients With Head and Neck Carcinoma and the Evaluation of Autoantibody Positivity Ratein this study, smooth muscle antibody (SMA), anti-nücleer antibody (ANA) anti- mitochondrial antibody (AMA), anti-parietal cell antibody (PA), antiglomerular basal membrane antibody (GM), serum immunglobulins and complement-C3 levels have been searched. The positivity rate of ANA (31.91 %) and SMA (38.29 %) were found high in sera of the patients with head and neck carcinoma which had been diagnosed histopathologically. But (...)
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