1 0 0 0 OA アカタビネズミMyopus middendorffi VINOGRADOV樺太に産す
1 0 0 0 OA 比較発生学からみたクモ類の系統
1 0 0 0 OA ヌマガエル過熟卵の発生(発生(受精・卵形成))
1 0 0 0 OA 紫外線照射をうけた四肺クモ胚の発生(形態・内分泌)
1 0 0 0 OA 甲状腺ホルモンの蛙幼生の生殖腺に及ぼす影響(実験形態)
1 0 0 0 OA II-3 クモ類の進化
1 0 0 0 OA 甲状腺が蛙の性転換に関係していること(実験形態・発生)
1 0 0 0 OA エストロジェンの日本赤蛙生殖腺分化に及ぼす影響(実験形態・発生)
1 0 0 0 OA 蛙の性転換に於ける脳下垂体のはたらき(発生・実験形態)
1 0 0 0 OA 蛙幼生の性転換に於ける脳下垂体の影響
The present study was undertaken with the object of determining whetehr the hypopysis has some connection with sex reversal in amphibians. Hypophysectomized or thyroidectomized frog larvae (Rana japonica) were treated with estrone (1mg/1) from 105 days of age for 45 days and thereafter maintained without estrone up to 225 days of age. In both groups of animals ovaries were not affected by estrone, but the testes, in most cases, were feminized (Figs. 1, 2). The hypophysis therefore had no connection with gonad feminization. After the treatment was stopped, feminized gonads of thyroidectomized larvae were restored to the testes, all of the ovocytes were destroyed, and the luteal-like bodies were formed (Fig. 3). On the other hand, feminized gonads of hypophysectomized larvae seemed to have evolved into the ovaries (Fig. 4). It seems probable that when the hormonal treatment is stopped, the hypophysis controls the developmental fate of the gonad feminized by the action of estrone.
1 0 0 0 横濱の文化財
- 著者
- 横浜市教育委員会社会教育部文化財課編
- 出版者
- 横浜市教育委員会
- 巻号頁・発行日
- 1984
1 0 0 0 OA 治水家としての河村瑞賢(下)
1 0 0 0 日本文化大学柏樹論叢
- 著者
- 日本文化大学 [編]
- 出版者
- 日本文化大学
- 巻号頁・発行日
- 1997
1 0 0 0 中国における地理教育の現状
- 著者
- 袁 家冬
- 出版者
- 日本地理教育学会
- 雑誌
- 新地理 (ISSN:05598362)
- 巻号頁・発行日
- vol.35, no.3, pp.10-21, 1987
1 0 0 0 OA 溜池築造法
- 著者
- 上野英三郎, 吉光平一 著
- 出版者
- 成美堂書店
- 巻号頁・発行日
- 1919
1 0 0 0 OA 農地測量学
- 著者
- 上野英三郎, 兼松義隆 著
- 出版者
- 成美堂書店
- 巻号頁・発行日
- 1926