Biological Membrane Models
Mostrando 1-12 de 31 artigos, teses e dissertações.
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1. Hemolytic, anticancer and antigiardial activity of Palythoa caribaeorum venom
Abstract Background Cnidarian venoms and extracts have shown a broad variety of biological activities including cytotoxic, antibacterial and antitumoral effects. Most of these studied extracts were obtained from sea anemones or jellyfish. The present study aimed to determine the toxic activity and assess the antitumor and antiparasitic potential of Palythoa
J. Venom. Anim. Toxins incl. Trop. Dis. Publicado em: 24/05/2018
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2. Efeito de características estruturais da quitosana sobre sua interação com filmes de Langmuir como modelo de biomembrana / Effects from the structural characteristics of chitosan on its interaction in Langmuir films as biomembrane models.
Chitosans are polysaccharides used in medicine, pharmacy, dentistry and in the inhibition of microorganisms growth (eg. as bactericidal agent). In these applications their action should depend on the interaction with cell membranes, which is difficult to verify because isolating a membrane is not easy. An alternative is to investigate the interaction with me
Publicado em: 2010
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3. Actin-interacting and flagellar proteins in Leishmania spp.: bioinformatics predictions to functional assignments in phagosome formation
Several motile processes are responsible for the movement of proteins into and within the flagellar membrane, but little is known about the process by which specific proteins (either actin-associated or not) are targeted to protozoan flagellar membranes. Actin is a major cytoskeleton protein, while polymerization and depolymerization of parasite actin and ac
Genetics and Molecular Biology. Publicado em: 2009
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4. Estudos por simulação molecular de sistemas peptídeos/bicamadas lipídicas: aplicação à relação estrutura atividade antibacteriana da indolicidina e de mutantes / Molecular simulation studies of peptide/bilayer systems: application to structure/activity relationship of the indolicidin and mutants.
Interações de peptídeos antimicrobianos com modelos de membranas biológicas têm sido extensivamente estudadas para entender as funções destes peptídeos e para elucidar seus mecanismos de ação. Muitos esforços têm sido realizados para aumentar a potência e a especificidade desses peptídeos com o propósito de serem mais seletivos aos organismos
Publicado em: 2009
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5. Modelagem estocástica de neurônios e sua interação em tempo real com neurônios biológicos / Stochastic neural modelling and interfacing neurons and models in real-time
We developed a mathematical model of the electrical activity of a motor neuron from the stomatogastric ganglion of crustaceans. It was inspired on a previous existing deterministic model which is considered as electrophysiologically plausible in the recent literature. However, this deterministic model were not able to reproduce the irregular bursting behavio
Publicado em: 2008
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6. Filmes nanoestruturados de materiais de interesse biológico: ênfase na interação com modelos de membrana e aplicações em biossensores / Nanostructured films with materials of biological interest: emphasis on interaction with membrane models and biosensor applications
A imobilização de moléculas de interesse biológico em superfícies sólidas é essencial para uma série de aplicações biotecnológicas. Dentre as técnicas de imobilização, a automontagem camada por camada por adsorção física possui inúmeras vantagens, incluindo condições brandas e fisiológicas de preparação, capacidade de incorporar difere
Publicado em: 2008
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7. Interaction of hidrophilic porphyrins and extracellular hemoglobin with biomimetic models of biological membranes / Interação de porfirinas hidrofílicas e de hemoglobina extracelular com modelos biomiméticos de membrana biológica
In the first part of this work interactions of the cationic meso tetrakis (4-N-methilpyridil) porphyrin (TMPyP) and meso-tetrakis (4-sulfonatophenyl) porphyrin (TPPS4) in the free base forms with membrane model systems (ionic micelles, mixed micelles and phospholipids vesicles) in aqueous solutions, have been investigated by optical absorption, resonance lig
Publicado em: 2008
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8. Dinamica e controle não lineares de um sistema neuronal ideal e nã-ideal / No-linear dynamics and control of an ideal and non-ideal neural system
In this work it is studied the plasmatic membrane behavior through an electric circuit. The electric model was developed by Hodgkin and Huxley at 1952 and it treats of the variation of the amount of time related with the potassium and sodium conductance s in the squid axon, this model has served as an archetype for mannering mathematical model of eletrophysi
Publicado em: 2005
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9. AVALIAÇÃO DA REMOÇÃO DE CD E ZN DE SOLUÇÃO AQUOSA POR BIOSSORÇÃO E BIOFLOTAÇÃO COM RHODOCOCCUS OPACUS / A STUDY OF CD AND ZN UPTAKE AND REMOVAL BY BIOSORPTION AND BIOFLOTATION USING RHODOCOCCUS OPACUS
The search for new technologies for the removal of hazardous metals from wastewater has been focused on several features for the biological materials as such: metal binding and flotation abilities. The aim of this work was to evaluate the biosorption and bioflotation abilities of Rhodococcus opacus for cadmium and zinc removal. Pre and post-characterizations
Publicado em: 2005
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10. "Avaliação histológica da reparação óssea induzida por osso bovino desmineralizado, em defeitos bicorticais na mandíbulas de ratos, com ou sem membranas de colágeno cálcicas" / Histological evaluation of bone healing induced by demineralized bovine bone, in bicortical defects of rat mandibles, with or without calcic collagen membranes
The use of demineralized bone (DB), in special from bovine source, has been evaluated extensively in experimental models; however, doubts exist if there is sufficient quantity of bone morphogenetic proteins (BMP) to induce the bone repairing. The combination of membranes avoids the encapsulating of DB particles and also it could prevent the early dissolution
Publicado em: 2004
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11. Chacacterization, modeling and computacional simulation on dynamics of neural cells connections and growth / Caracterização, modelagem e simulação matemático-computacional da dinâmica do crescimento e conexões de células neurais
In this thesis we report the investigation and simulation of dynamic models of neural growing, and their characterization using shape features, considering the form function relationship and neuromorphometry. The thesis begins by presenting an overview about neuroscience, neural cell biology and the biological factors that affects the neuron form development
Publicado em: 2003
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12. Flickering fusion pores comparable with initial exocytotic pores occur in protein-free phospholipid bilayers
For the act of membrane fusion, there are two competing, mutually exclusive molecular models that differ in the structure of the initial pore, the pathway for ionic continuity between formerly separated volumes. Because biological “fusion pores” can be as small as ionic channels or gap junctions, one model posits a proteinaceous initial fusion pore. Beca
National Academy of Sciences.