HYDROPHOBIC BONDS AND HAIR TREATMENTS 241 few restraining disulfide crosslinks remain, thus, the stabilizing influence of the hydro- phobic crosslinks becomes more prevalent in maintaining the native structure of the keratin. (1) (2) ?:'' (3) .. •'•. (4) .: (5) (6) 55:: (7) (8) : ::5::'! (9) . :: '..i!:' (lO) ":': (11). ::: :::: (1.2) (1•) :.. :. REFERENCES L. J. Wolfram and M. K. O. Lindemann, Some observations on the hair cuticle, J. Soc. Cosmet. Chem., 22,839(1971). M. Harris et. al., Role of cystine in the structure of the fibrous protein, wool, J. Res. Nat. Bur. Stand., 27, 89 (1941) ..... J. B. Speakman, Mechano-chemical methods for use with animal fibers, J. Text. Inst., 38, T102 (1947). E. I. Valco and G. Barnett, A study of the swelling of hair in mixed aqueous solvents, J, Soc. Cosmet. Chem., 3,108 (1952). K. C. Tsou, R. J. Barnett, and A.M. Seligman, Preparation of some N-(l-naphthyl)-maleimides as sulfhydryl group reagents, J. Amer. Chem. Sot., 77, 4613 (1955). J. R. Heitz, C. D. Anderson, and B. M. Anderson, Inactivation of yeast alcohol dehydrogenase by N- alkyl maleimides, Arch. Biochem. Biophys., 127,627 (1968). L. E. Coleman, Jr., J. F. Bork, and H. Dunn, Jr., Reaction ofprimary aliphatic amines with maleic anhy- dride, J. Org. Chem., 24, 135 (1959). H. D. Weigmann, Reduction of disulfide bonds in keratin with 1,4-dithiothreitol. I. Kinetic investiga- tion, J. Polym. Sci. A-I, 6, 2237 (1968). L.J. Wolfram and D. L. Underwood, The equilibrmm between the disulfide linkage in hair keratin and sulfite or mercaptan, Text. Res. J., 36,947 (1966). I. M. Klotz, Role of water structure in macromolecules, Fed, Proc. Fed. Amer. Soc. Exp. BioL, 24, Suppl. 15, S-24 (1965). E. Wicke, Structure formation and molecular mobility in water and in aqueous solutions, Angew. Chem Int. Ed., 5,106 (1966). G. Nemethy, Hydrophobic interactions, Angew. Chem. Int, Ed., 6, 195 (1967). A.D. Jenkins and L. J. Wolfram, The chemistry of the reaction between tetrakis (hydroxymethyl) phos- phomum chloride and keratin, J. Soc. Dyers Colour., 79, 55 (1963).
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