Studies on surfactant-biopolymer interaction. I. Microcalorimetric investigation on the interaction of cetyltrimethylammonium bromide (CTAB) and sodium dodecylsulfate (SDS) with gelatin (Gn), lysozyme (Lz) and deoxyribonucleic acid (DNA).
Biophys Chem
; 98(3): 313-27, 2002 Aug 02.
Article
em En
| MEDLINE
| ID: mdl-12128183
ABSTRACT
The interaction of the surfactants cetyltrimethyl ammonium bromide (CTAB) and sodium dodecyl sulfate (SDS) with the biopolymers gelatin (Gn), lysozyme (Lz) and deoxyribonucleic acid (DNA) was studied by isothermal titration microcalorimetry at varied biopolymer concentration, pH and temperature. The nature of interaction of the surfactants with the biopolymers was assessed from the observed enthalpy-[surfactant] profiles. The biopolymer-induced aggregation of the surfactants was observed. The enthalpies of aggregation of amphiphiles, binding of aggregates with macromolecules, organisational change of bound aggregates, and threshold concentrations for micelle formation of surfactants in the presence of biopolymers were estimated. The results collected on the three biopolymers were analysed and compared.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Dodecilsulfato de Sódio
/
Tensoativos
/
Biopolímeros
/
DNA
/
Muramidase
/
Compostos de Cetrimônio
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Gelatina
Idioma:
En
Ano de publicação:
2002
Tipo de documento:
Article