The transition of C. albicans from unicellular yeast form to filamentous form i.e., pseudohyphae and hyphae is referred to as morphogenesis. C. albicans has the ability to respond to environmental conditions and accordingly changing its cell morphology. Three main morphological forms of C. albicans are unicellular yeast, pseudohyphae and hyphae. The effect of different growth media (Horse serum medium, RPMI-1640, MSGB), incubation temperatures (34˚C, 37˚C, 40˚C) and pH values (5.4, 6.4, 7.4) on germ tube production by C. (...) albicans was evaluated. Horse serum medium noticeably promotes filamentation while RPMI-1640 medium shows moderate filamentation and MSGB media shows moderately low filamentation. The germ tube of C. albicans developed early in 1.5 hr at high temperature i.e., 40˚C. Incubation temperature of 37˚C was associated with highest germ tube formation while 34˚C shows low filamentation. A pH of 5.4 also induces low filamentation, pH 6.4 gives moderately lower than pH 7.4. A pH of 7.4 was best suited for germ tube induction. The peak of mycelium production appears between 1.5 and 6 hr after inoculation of C. albicans culture. These results suggested that environmental factors are important in selectively favoring yeast or hyphal form, most important being the growth medium, incubation temperature and external pH value. (shrink)

Bryophyllum pinnatum is a medicinal plant from the Crassulaceae family. It's traditionally used in Ayurvedic and folk medicine to cure various ailments, and its phytochemicals are used in the reduction of metal ions to produce nanoparticles. This study is aimed at the biosynthesis of nickel oxide nanoparticles using Bryophyllum pinnatum as a reducing, capping, and stabilizing agent, characterizing the synthesized nanoparticles, and studying the anti-microbial activity against Escherichia coli, Staphylococcus aureus, Bacillus subtilis, and Pseudomonas aeruginosa as well as fungi; (...) class='Hi'>Candida albicans, and Aspergillus niger. The synthesized nanoparticle was confirmed by UV-VIS, FT-IR, SEM-EDX, and XRD. The UV-VIS indicated the presence of chromophore and a surface plasmon resonance occurring in the sample with a band gap of 4.38 eV. The FT-IR result revealed the stretching vibration of the Ni-O bonds at 715 cm-1. The SEM analysis showed the morphology of the nanoparticles, and the EDX revealed that NiO-NPs are composed of oxygen and nickel elements. The XRD confirmed a face-centered cubic structure with an average size of 16.377 nm. The antimicrobial analysis exhibited the tested minimum concentration against all the bacterial strains. The synthesized Nickel oxide nanoparticles are useful in inhibiting the growth of different types of bacteria. -/- . (shrink)

English Abstract This work expands the crucial and evolving Inter-American philosophical dialogue from its current state, which has focused on establishing commonalities between the Americas, to include conversations that intelligently and candidly address points of contention. This paper strives to constructively introduce into this dialogue a trenchant critique of one of the most influential English language philosophers of the Americas – John Dewey—made by one of the most influential Spanish language philosophers of the Americas – José Vasconcelos. In particular, this (...) paper examines Vasconcelos’ charge that Dewey’s Pragmatism was merely a gunship philosophy designed to provide ideological cover for a U.S. led Anglo-Saxon global empire. This critique merits scholarly attention not only because it is virtually unknown among English language philosophers (as it is still only available in Spanish), but because it anticipates later discussions about the relationship between Pragmatism, democracy and empire in the United States. -/- Resumen en español Este trabajo expande el diálogo filosófico Inter-Americano crucial y en evolución de su estado actual, el cual se ha enfocado en establecer los puntos comunes entre las Américas, para incluír conversaciones que de forma inteligente y cándida abordan los puntos de discordia. Este ensayo se esfuerza para introducir constructivamente al diálogo una crítica incisiva de uno de los más influyentes filósofos de lengua inglesa de las Américas – John Dewey – hecha por uno de los más influyentes filósofos de lengua española de las Américas – José Vasconcelos. En particular, este ensayo examina el aporte de Vasconcelos de que el pragmatismo de Dewey era simplemente una filosofía de intimidación con el único propósito de proveerle un amparo ideológico a un imperio global anglosajón comandado por los Estados Unidos. Esta crítica merece atención académica no solo por ser virtualmente desconocida entre los filósofos de lengua inglesa (por seguir siendo solamente disponible en español), pero porque anticipa siguientes discusiones sobre la relación entre el pragmatismo, la democracia, y el imperio en los Estados Unidos. -/- Resumo em português Este trabalho amplia o diálogo filosófico Interamericano crucial e em evolução do seu estado atual, que tem focado em estabelecer pontos em comum entre as Américas, para incluir conversas que de forma inteligente e candidamente abordem pontos de discórdia. Este artigo se esforça para introduzir construtivamente neste diálogo uma crítica mordaz a um dos mais influentes filósofos de língua inglesa das Américas -- John Dewey -- feito por um dos mais influentes filósofos de língua espanhola das Américas - José Vasconcelos. Em particular, este artigo examina a acusação de Vasconcelos de que o pragmatismo de Dewey era meramente uma filosofia de intimidação para fornecer cobertura ideológica para um imperio global anglo-saxão conduzido pelos EUA. Esta crítica merece a atenção acadêmica não só porque é praticamente desconhecida entre os filósofos de língua inglesa (como ainda só está disponível em espanhol), mas porque antecipa discussões posteriores sobre a relação entre o pragmatismo, a democracia e o império nos Estados Unidos. (shrink)