Catanionic
Mostrando 1-3 de 3 artigos, teses e dissertações.
-
1. Propriedades físico-químicas do surfatante cataniônico dodecilsulfato de dodecildimetil-n-hidroxilamônio / Physical-chemical properties of catanionic surfactant dodecyldimehyl-n-hydroxylamonium dodecylsuphate
The catanionic surfactant dodecyldimehyl-n-hydroxylamonium dodecylsulphate was prepared and its physical-chemical properties were characterized. The surfactant presented very low water solubility, but with ability to reduce the surface tension and the interfacial tension between water and xylene, in both situations with slow kinetics of interface saturation.
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 14/12/2009
-
2. DNA-lipid systems: A physical chemistry study
It is well known that the interaction of polyelectrolytes with oppositely charged surfactants leads to an associative phase separation; however, the phase behavior of DNA and oppositely charged surfactants is more strongly associative than observed in other systems. A precipitate is formed with very low amounts of surfactant and DNA. DNA compaction is a gene
Brazilian Journal of Medical and Biological Research. Publicado em: 2002-05
-
3. The origins of stability of spontaneous vesicles
Equilibrium unilamellar vesicles are stabilized by one of two distinct mechanisms depending on the value of the bending constant. Helfrich undulations ensure that the interbilayer potential is always repulsive when the bending constant, K, is of order kBT. When K ≫ kBT, unilamellar vesicles are stabilized by the spontaneous curvature that picks out a
The National Academy of Sciences.