Documentation scienceplus.abes.fr version Bêta

À propos de : Micellar Properties of Quillaja Saponin. 1. Effects of Temperature,Salt, and pH on Solution Properties        

AttributsValeurs
type
Is Part Of
Subject
Title
  • Micellar Properties of Quillaja Saponin. 1. Effects of Temperature,Salt, and pH on Solution Properties
has manifestation of work
related by
Author
Abstract
  • We used surface tension and dye solubilization measurements todemonstrate that quillaja saponinmolecules aggregate into micelles above a critical micelleconcentration (cmc), whose value rangesbetween 0.5 and 0.8 g/L at 298 K. Below the cmc, this surfactantforms a saturated interfaciallayer with 2 μmol/m2. Increased temperature or pHincreases the cmc, while increased saltconcentration decreases this value. The size of saponin micelleswas found to increase stronglywith temperature but to have little dependence on salt concentration orpH. The effect of increasedtemperature on size is accompanied by a decrease in intrinsicviscosity, suggesting substantialdehydration of the micelles at higher temperatures. We alsoobserved some differences betweenquillaja saponins obtained from various commercial sources. Theknowledge gained from thesestudies of quillaja saponin solutions is useful in exploring theirability to extract solutes of biologicalsignificance and for understanding the functioning of these biologicalsurfactants in foods and invivo. Keywords: Micelles; critical micelle concentration; aggregation number;solubilization
article type
is part of this journal



Alternative Linked Data Documents: ODE     Content Formats:       RDF       ODATA       Microdata