Differential scanning calorimetric and powder X-ray diffraction studies on a homologous series of N-acyl-L-alanine esters with matched chains (n = 9-18)
作者:D SIVARAMAKRISHNA、MUSTI J SWAMY
DOI:10.1007/s12039-015-0928-5
日期:2015.9
alternation with compounds bearing odd acyl and alkyl chains showing higher values of T t, ΔH t and ΔS t as compared to NAAEs with even acyl and alkyl chains. However, the transition enthalpies and entropies of the odd- and even chainlength series independently exhibit a linear dependence on the chainlength. The d-spacings obtained from PXRD increase linearly with chainlength with an increment of 1.76 Å/CH
PROTEINOUS EMULSIFIER, PROCESS FOR ITS PREPARATION, AND EMULSIFIED COSMETIC PREPARATION CONTAINING SAME
申请人:KANEBO, LTD.
公开号:EP0160103A1
公开(公告)日:1985-11-06
A proteinous emulsifier is obtained by reacting an amino acid ester with a hydrophilic protein in the presence of endopeptidase to bind the amino group of the amino acid ester to the carboxyl terminal of a hydrophilic protein decomposition product through an amide bond. This emulsifier has a typical surfactant structure wherein the hydrophobic amino acid ester moiety is bound to the end of the hydrophilic protein moiety. It slightly stimulates skin and shows a strong emulsifying effect and a good moisture retention, thus being extremely suitable as emulsifier for various cosmetic preparations such as creams, milky lotions, etc.