Reactivity of hair cystine in microemulsion media.
Synopsis Reduction of keratin cystine by thioglycolic acid incorporated in microemulsions of the water/sodium dodecilsulphate/n-pentanol/n-dodecane system has been determined. The results obtained have been interpreted in relation to the properties of the reaction media. Microemulsions with constant oil-to-surface active mixture weight ratios (R(o/s)) and different concentrations of water were chosen as reaction media. At low water concentrations a steep increase in reactivity with the increase of water was observed at all values of R(o/s). However it was more pronounced the higher the oil content. A relation between maximum cysteine formation and percolative behaviour of the microemulsion was found at high R(o/s) values.
Erra
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Institute de Tecnología Química y Textil (C.S.I.C.), c/o Jorge Girona Salgado, 18-26, 08034 Barcelona, Spain.
Solans
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C
Azemar
N
N
Parra
J L
JL
Touraud
D
D
Clausse
M
M