LIGHT RADIATION EFFECTS ON HAIR 677 cess of this program. The authors would also like to thank the Meteor- ology Department of the Argonne National Laboratory, Lemont, Ill., for the solar radiation data. (Received March 22, 1971) REFERENCES (1) Speakman, J. B., Mechano-chemical methods for use with animal fibers, J. Text. Inst., Trans., •8, 102-26 (1947). (2) Feughelman, M., and Reis, P. J., The longitudinal mechanical properties of wool fibers and their relationship to the low sulfur keratin fraction, Text. Res. J., •7, 884-6 (1967). (3) Collins, J. D., and Chaikin, M., The stress-strain behavior of dimensionally and struc- rurally, non-uniform wool fibers in water, Ibid., •5, 777-87 (1965). (4) Rebenfeld, L., Weigrnann, H. D., and Dansizer, C., Temperature dependence of the mechanical properties of human hair in relation to structure, J. Soc. Cosmet. Chem., 17, 525-38 (1966). (5) Bogaty, H., Torsional properties ,of hair in relation to permanent waving and setting, Ibid., 18, 575-89 (1967). (6) O'Connell, R. A., and Walden, M. K., Influence of ionizing radiations on wool fiber properties, Text. Res. J., 27, 516-18 (1957). (7) Berth, P., and Reese, G., Alteration of hair keratin by cosmetic processing and natural environmental influences, J. Soc. Cosmet. Chem., 15, 659-66 0964). (8) Zahn, H., Stein, W., and Blankenburg, G., Influence of surfactants on the physical prop- erties of keratin fibers, Fette, Seifen, Antrichm., 70, 756-60 (1968). (9) Deem, D. E., and Rieger, M. M., Mechanical hysteresis of chemically modified hair, J. Soc. Cosmet. Chem., 19, 395410 (1968). (10) Korostoff, E., Rawnsley, H. M., and Shelley, W. B., Normalized stress-strain relationship in human hair perturbation by hypothyroidism, Brit. J. Dermatol., 8•, 27-36 (1970). (l l) Swanbeck, G., Nyren, J., and Juhlin, L., Mechanical properties of hairs from patients with different types of hair diseases, J. Invest. Dermatol., 54, 248-51 (1970). (12) Price, V. H., and Menefee, E., On the effect of dimethyl sulfoxide on hair keratin, Ibid., 49, 297-301 (1967). (13) Speakman, J. B., and McMahon, P. R., The action of light on wool and related fibers, N. Z. J. Sci. Technol., 20, 248B-264B (1939). (14) Beyak, R., Meyer, C. F., and Kass, G. S., Elasticity and tensile properties of human hair. I. Single fiber test method, ]. Soc. Cosmet. Chem., 20, 615-26 (1969). (15) Book o[ ASTM Standards, Part 30, ASTM designation E187-63T, "Conducting natural light (sunlight and daylight) exposures under glass," Philadelphia, 1964, p. 526. (16) Climatological Data, National Summary, U.S. Department of Commerce, Environmen- tal Data Service, Asheville, N. C., 1970. (17) Wolfram, L. J., Hall, K., and Hui, ,•., The mechanism of hair bleaching, jr. Soc. Cosmet. Chem., 21,875-900 (1970). (18) Setlow, J. K., The Effects of Ultraviolet Radiation and Photoreactivation, in Florkin, M., and Slotz, E. H., Comprehensive Biochemistry, Vol. 27, Photobiology, Ionizing Ra- diation, American Elsevier, New York, N.Y., 1967, pp. 157-209. (19) Alexander, P., and Lett, J. T., Effects of Ionizing Radiations on Biological Macromole- cules, Ibid., pp. 267-356. (20) Marzona, M., and Dimodica, G., Effects of ionizing radiations on wool. Part 1: Solu- bility in alkalis, acids, urea, and urea-bisulfite solutions, Text. Res. jr., •8, 974-76 (1968).
678 JOURNAL OF THE SOCIETY OF COSMETIC CHEMISTS (21) Joubert, F. J., Botes, D. P., and Haylett, T., The action of ultraviolet light on wool, J. Afr. Chem. Inst., 17, 44-54 (1964). (22) Dunlop, J. I., and Nicholls, C. H., Electron spin resonance studies of UV irradiated keratin and related proteins, Photochem. Photobiol., 4, 891-90 (1965). (23) Shatkay, A., and Michaeli, I., Electron paramagnetic resonance study of wool irradiated by ultra-violet and visible light, Radiat. Res., 43, 485-98 (1970). (24) Bhan, M. M., and Sule, A.D., The effect of sunlight on canary-stained wools, J. Text. Inst., Trans., 58, 46-8 (1967). (25) Luse, R. A., and McLaren, A.D., Mechanism of enzyme inactivation by ultraviolet light and the photochcmistry of amino acids (at 2537 •), Photochem. Photobiol., 2, 343-60 0963).
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