HISTOCHEMICAL AND BIOCHEMICAL-STUDY OF CI RCANNUAL ASPECTS OF CARBOHYDRATE DEPENDENT ENERGY-METABOLISM IN THE HAIR-FOLLICLES OF TURKISH ANGORA-GOATS

Based on biopsy material, the study describes circannual variations of the accumulation of glycogen and organic carbon in the hair follicles . The results have been obtained by histochemical and biochemical meth ods. The histochemical densitometrical analysis of glycogen contents i n the cells of the outer epithelial root sheath of the hair follicles exhibited a clear circannual course, with maxima in May/June and Decem ber, and minima in March and August. The content of organic carbon of the hair follicles was 7.61 mu g/mg (max. 21.56 mu g/mg) DW on average , with a corresponding annual cycle. The findings are discussed with r egard to the energy metabolism of the hair follicle, especially in vie w of the fact that a biphasic cycle of hair growth becomes obvious in the Turkish Angora goat a phenomenon that is obscured by other methods .