The use of radiolabelling techniques to measure substantivity to, and penetration into, hair of protein hydrolysates.

The use of 14C-labelled amino acids enables the measurement of both the total substantivity to hair and the degree of penetration into the hair shaft of amino acid mixtures derived from complete hydrolysis of proteins. The technique utilizes the fact that direct measurement of 14C radioactivity of the treated hair detects only the surface substantivity… CONTINUE READING