Pressure-induced dissociation of casein micelles: size distribution and effect of temperature
Braz. j. med. biol. res
;
38(8): 1209-1214, Aug. 2005. ilus, tab, graf
Artículo
en Inglés
| LILACS
| ID: lil-405522
RESUMO
Pressure-induced dissociation of a turbid solution of casein micelles was studied in situ in static and dynamic light scattering experiments. We show that at high pressure casein micelles decompose into small fragments comparable in size to casein monomers. At intermediate pressure we observe particles measuring 15 to 20 nm in diameter. The stability against pressure dissociation increased with temperature, suggesting enhanced hydrophobic contacts. The pressure transition curves are biphasic, compatible with a temperature (but not pressure)-dependent conformational equilibrium of two micelle species. Our thermodynamic model predicts an increase in structural entropy with temperature.
Texto completo:
Disponible
Índice:
LILACS (Américas)
Asunto principal:
Caseínas
/
Micelas
Tipo de estudio:
Estudio pronóstico
Idioma:
Inglés
Revista:
Braz. j. med. biol. res
Asunto de la revista:
Biologia
/
Medicina
Año:
2005
Tipo del documento:
Artículo
/
Congreso y conferencia
País de afiliación:
Alemania
Institución/País de afiliación:
Department for Food and Nutrition/DE
/
Technical University Munich/DE
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