鶏の換羽機構に關する内分泌學的研究 : (第1報) 鶏の甲状腺特に換羽期に於ける成鶏甲状腺の細胞學的研究

概要

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The fact that the moulting has been induced primarily by the function of the thyroid is distinctly recongnized by many workers. However, cytological change of gland throughout the phases of the moulting has not yet been described. From the reasons upper-described we have attempted first the cytological observation of the gland. The results obtained are as, follows: 1. From cytological point of view, thyroids of moulting hens and those of chickens about 30-day old are most hyperactive functionally. 2. The colloid contained in the follicle is stained differently by SEVERINGHAUS method, namely, red, pale bleu, purple red and sometimes combined these colour tones. The affinity for stains may be refer the percentage of iodine content in the colloid. It may be supposed that newformed colloid materials are stained red, while older ones are stained blue or purple red. 3. Colloidal substance has been found in the interstices of the connective tissue surrouding the Morever, it may be detected in the follicular cells. In the latter case it is stained blue. 4. The formation of young follicle appears numerously in the glands of moulting hen, and 30-day old chick. In these materials, three modes of follicular formation are obseved. 5. The cluster of interfollicular epithelial cells are formed by translocation of follicular cells, but its function is obscure in the morphological observation.