Zwitterions
Mostrando 1-5 de 5 artigos, teses e dissertações.
-
1. ANÁLISE ESTRUTURAL DE COMPLEXOS DERIVADOS DE TELÚRIO / STRUCTURAL ANALYSIS OF TELLURIUM BASED COMPLEXES
Este trabalho apresenta a síntese e a análise estrutural de diferentes classes de complexos derivados de telúrio, com a obtenção de zwitterions, polímeros de coordenação, e também, complexos heteronucleares, a partir de ditelureto de bis-4-piridila (4) e do ligante N, N, N, N-tetraetil-N,N-piridina-2,6- dicarbonil-bis(tioureia) (12). Os ligantes uti
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 18/03/2011
-
2. Aplicação de modelos simples em fenômenos envolvendo monocamadas e micelas / Application of simple models in monolayers and micelles
O presente estudo versa sobre a proposição ou extensão de modelos simples para descrever os seguintes fenômenos envolvendo agregados anfifílicos: i-) Influência de sal na concentração micelar crítica (CMC) e número médio de agregação () de micelas zwitteriônicas. ii-) Influência da interação eletrostática (neste caso, repulsiva) e tamanho d
Publicado em: 1999
-
3. Anion, cation, and zwitterion selectivity of phospholemman channel molecules.
Phospholemman (PLM), a 72-amino acid membrane protein with a single transmembrane domain, forms taurine-selective ion channels in lipid bilayers. Because taurine forms zwitterions, a taurine-selective channel might have binding sites for both anions and cations. Here we show that PLM channels indeed allow fluxes of both cations and anions, making instantaneo
-
4. Nonexponential fluorescence decay of aqueous tryptophan and two related peptides by picosecond spectroscopy
Time-resolved fluorescence spectroscopy of tryptophan and two related dipeptides, tryptophylalanine and alanyltryptophan, has been carried out on the subnanosecond time scale by using picosecond exciting pulses at a wavelength of 264 nm. Detection was with an ultrafast streak camera coupled to an optical multichannel analyzer. The zwitterions of these molecu
-
5. Composition, Variation, and Dynamics of Major Osmotic Solutes in Methanohalophilus Strain FDF1
Methanohalophilus strain FDF1, a member of the halophilic genus of methanogens, can grow over a range of external NaCl concentrations from 1.2 to 2.9 M and utilize methanol, trimethylamine, and dimethyl sulfide as substrates for methanogenesis. It produces the osmolytes glycine betaine, β-glutamine, and Nε-acetyl-β-lysine with increasing external NaCl, bu