Zobrazeno 1 - 10
of 16
pro vyhledávání: '"Yasumasa Wakafuji"'
Autor:
Yuriko Takeno, Junko Noguchi, Motokazu Tachibana, Yasuhiro Kawai, Eiji Kobayashi, Tetsuo Kunieda, Yasumasa Wakafuji
Publikováno v:
Experimental Animals. 53:379-382
TF is a mutant rat strain showing male pseudohermaphroditism controlled by an autosomal single recessive gene (mp). The affected rats show lack of Leydig cells and androgen deficiency. In this study, we performed linkage analysis using F(2) progeny o
Autor:
Tsunekata Ito, Toru R. Saito, Kazuaki W. Takahashi, Junko Noguchi, Ryoji Hokao, Yasumasa Wakafuji, Tomonori Imamichi, Yoshio Agematsu
Publikováno v:
Experimental Animals. 41:259-268
Fifteen male SPF Wistar-Imamichi rats, aged 10, 27 and 44 weeks, that had been raised in the authors' laboratory, were used for the observation of copulatory behavior. Each male was given the opportunity to mate with a proestrous female. During a two
Autor:
Shinobu Aoki, Yasumasa Wakafuji, Akiko Dohbutsu, Toru R. Saito, Masahiro Sugiyama, Fuhito Fujieda, Kazuaki W. Takahashi, Hiromi Amao, Iwami Kiyosawa, Ryoji Hokao
Publikováno v:
Experimental Animals. 40:101-104
The copulatory behavior in sexually inexperienced male voles aged 9-13 weeks old was observed under dim red illumination. Proestrous females were used as stimulus voles in copulatory behavior tests. A 30-min test session was recorded. All males showe
Publikováno v:
Experimental Animals. 42:111-113
In general, sexual activity in normal animals declines with increasing age. In aged male rats, for example, no ejaculation occurs when paired with receptive females. The ejaculatory response induced by p-chloroamphetamine (PCA) in aged adult rats, 14
Autor:
Toru R. Saito, Kazuaki W. Takahashi, Hiromi Amao, Ryoji Hokao, Masahiro Sugiyama, Shinobu Aoki, Yasumasa Wakafuji
Publikováno v:
Experimental Animals. 41:75-77
The sexual receptive and proceptive behaviors induced by opiate antagonists, naloxone and naltrexone in estrogen-primed ovariectomized rats were observed under the presence of sexually active males. The females were treated intraperitoneally with nal
Autor:
Yasumasa Wakafuji, Toru R. Saito, Kazuaki W. Takahashi, Masahiro Sugiyama, Yoshiyuki Sasaki, Shinobu Aoki, Yasufumi Shutoh, Hiromi Amao, Ryoji Hokao
Publikováno v:
Experimental Animals. 40:561-563
The ejaculatory response induced by p-chloroamphetamine (PCA) in male rats, hamsters and mice was observed during 2 hours after the injection. The animals were treated intraperitoneally with PCA at doses ranging from 0.78125 to 160 mg/kg. The ED50 (e
Autor:
Iwami Kiyosawa, Hiromi Amao, Ryoji Hokao, Toru R. Saito, Masahiro Sugiyama, Kazuaki W. Takahashi, Akiko Dohbutsu, Shinobu Aoki, Yasumasa Wakafuji
Publikováno v:
Experimental Animals. 40:117-119
It is well known that the male rats paired with receptive females emit the 22-kHz vocalization after ejaculation. The question addressed is whether after ejaculation injected with PCA without receptive females the 22-kHz call would be emitted. Emissi
Publikováno v:
Experimental Animals. 39:109-111
The vomeronasal organ (VNO) of female Wistar-Imamichi rats was removed completely. The females were impregnated and gave birth to young. The question addressed was whether such dams would show deficits in nursing behavior. The data indicated that rem
Autor:
Toru R. Saito, Kazuaki W. Takahashi, Yasumasa Wakafuji, Ryoji Hokao, Yoshio Agematsu, Noriyuki Igarashi
Publikováno v:
Laboratory animals. 30(4)
The present study was undertaken to determine sperm motility and counts in semen yielded by para-chloroamphetamine (PCA)-induced ejaculation of aged rats which had lost their reproductive ability, and to attempt artificial insemination with suspensio
Autor:
Kohji Matsuo, Kazuaki W. Takahashi, Toru R. Saito, Yasumasa Wakafuji, Takao Yamaguchi, Ryoji Hokao
Publikováno v:
Jikken dobutsu. Experimental animals. 42(2)
In order to improve the productivity of Syrian hamsters, we investigated whether a male could impregnate overnight more than one proestrous female. Twenty-one males and 49 females aged 8 to 10 weeks were used in this experiment. The mating systems we