KERATINIZATION OF EMBRYONIC SKIN

[摘要] Chemical and physical aspects of keratinitzation were studied in embryonic skin by histo-chemical and polarization optical methods. As an experimental material, the scalp of dated chick embryos was used. Formation of a thin, SH-rich layer at the outer surface of the epidermis was observed as early as the 10th day of embryonic life. True keratinization started on the 16th day; but a well-oriented and stabilized keratin was formed only during the last 2 days of embryonic life.