Hybrid Bilayer Membrane
Mostrando 1-7 de 7 artigos, teses e dissertações.
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1. Confinement of a Nonionic Surfactant Membrane Within a Montmorillonite as a New Way to Prepare Organoclay Materials
The aim of this study was to prepare and characterize a hybrid layered material (organoclay) with a Na-montmorillonite and the triethylene glycol mono-n-decyl ether (C10E3) nonionic surfactant which forms a lamellar phase at room temperature. The synthesized organoclay was characterized by complementary techniques (Fourier transform infrared spectroscopy and
Mat. Res.. Publicado em: 29/09/2016
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2. Development of membrane biosensors and characterization of the interactions between cytochrome c and hybrid bilayer membranes by Surface Plasmon Resonance / Desenvolvimento de biosensores de membranas e caracterização da interação entre citocromo c e bicamadas híbridas por ressonância plasmônica de superfície
The aim of this work was to develop membrane biosensors based on Surface Plasmon Resonance (SPR) and to apply them to study the interactions between cytochrome c (cyt c) and model membranes. SPR is an optical technique that provides high-sensitivity measurements of refractive index (n), allowing the characterization of the adsorption and desorption of molecu
Publicado em: 2008
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3. Supported phospholipid/alkanethiol biomimetic membranes: insulating properties.
A novel model lipid bilayer membrane is prepared by the addition of phospholipid vesicles to alkanethiol monolayers on gold. This supported hybrid bilayer membrane is rugged, easily and reproducibly prepared in the absence of organic solvent, and is stable for very long periods of time. We have characterized the insulating characteristics of this membrane by
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4. Supramolecular effects and molecular discrimination by macrocyclic hosts embedded in synthetic bilayer membranes.
Hybrid assemblies were prepared in combinations of a synthetic lipid, involving an L-alanine residue interposed between an anionic head group and a hydrophobic double-chain segment, with cage-type cyclophanes having a three-dimensionally extended hydrophobic cavity. Incorporation behavior of the cage-type hosts into the multi- and single-walled vesicules was
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5. Evidence the yeast STE3 gene encodes a receptor for the peptide pheromone a factor: gene sequence and implications for the structure of the presumed receptor.
Haploid yeast cells of the a mating type secrete a peptide pheromone, a factor, which acts on cells of the alpha mating type to prepare them for conjugation. We show that the STE3 gene, which is required for mating only by alpha cells and is transcribed only in alpha cells, likely encodes a cell-surface receptor for a factor. This view is based on three find
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6. Sublethal Concentrations of Pleurocidin-Derived Antimicrobial Peptides Inhibit Macromolecular Synthesis in Escherichia coli
Cationic bactericidal peptides are components of natural host defenses against infections. While the mode of antibacterial action of cationic peptides remains controversial, several targets, including the cytoplasmic membrane and macromolecular synthesis, have been identified for peptides acting at high concentrations. The present study identified peptide ef
American Society for Microbiology.
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7. Formamidinium-induced dimer stabilization and flicker block behavior in homo- and heterodimer channels formed by gramicidin A and N-acetyl gramicidin A.
Compared to the N-formyl gramicidin A (GA), the N-acetyl gramicidin A (NAG) channel has unchanged conductance in 1 M NH4+ (gamma NN/gamma GG = 1, conductance ratio) but reduced conductance in 1 M K+ (gamma NN/gamma GG = 0.6) methylammonium (gamma NN/gamma GG = 0.3), and formamidinium (gamma NN/gamma GG = 0.1) solutions. Except with formamidinium, "flicker bl