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Registros recuperados: 21
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Effect of Bovine Somatotropin Administration on Day 11 after Artificial Insemination in Estrus-Induced Ewes during the Non-Breeding Season OAK
Fukui, Yutaka; Yamamura, Kunio; Matsunaga, Nobuyoshi; Miyamoto, Akio; 福井, 豊; 宮本, 明夫.
The present study aimed to examine the possibility that bovine somatotropin (BST) treatment after artificial insemination (AI) may improve the fertility by the stimulation of corpus luteum (CL) function in seasonally anestrous ewes. The experiment was conducted at the Tawa Field Station, Shibecha-cho in Hokkaido, Japan, during the non-breeding season (May, 1995). Eighty-nine mature (2 to 3 years old) Suffolk and Suffolk-crossed ewes were treated with controlled internal drug release devices containing 0.3 g progesterone (CIDR-G) for 12 days. Ewes were injected intramuscularly with 500 IU PMSG the day before CIDR removal. Eighty-seven ewes were assigned to an insemination of frozen semen on a fixed-time basis (42 to 50 h) after removal of CIDR. On the 11th...
Palavras-chave: Bovine somatotropin; Artificial insemination; Progesterone; Conception rate; Ewes.
Ano: 2000 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/2971
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Effects of Seasonal Changes on In Vitro Developmental Competence of Porcine Oocytes OAK
SUZUKI, Yo; WATANABE, Hiroyuki; FUKUI, Yutaka; 福井, 豊.
The aim of this study was to investigate whether seasonal changes affected in vitro developmental competence of porcine oocytes. The relationship between atmospheric temperature and embryonic development of in vitro matured porcine oocytes following intracytoplasmic sperm injection was examined throughout the year. The blastocyst rate (31.1%) in winter (mean atmospheric temperature during December to February: -3.8 C) was significantly higher (P<0.05) than those of other seasons in 2008/2009 (19.7-23.5%; 6.3-17.5 C). The monthly mean blastocyst rates were negatively correlated with the temperatures (r=-0.5944, P<0.05). The results of the present study suggest that porcine embryos could be produced throughout the year, but the in vitro production...
Palavras-chave: Embryonic development; Pig; Seasonal changes; Temperature.
Ano: 2010 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/2814
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Effects of various nutrients and renewal of medium on in vitro development of bovine oocytes matured and fertilized in vitro OAK
FUKUI, Yutaka; LEE, Eun Song; KANEZAWA, Yuka; 福井, 豊; 李, 殷松; 金澤, 由佳.
http://www.obihiro.ac.jp/~library/kenkyu.html
Palavras-chave: Amino acid; Glucose; In vitro development; Oocyte; Cattle.
Ano: 1995 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/3790
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Enhanced Oocyte Activation by Intracytoplasmic Injection of Porcine Spermatozoa Pre-treated with Dithiothreitol OAK
Watanabe, Hiroyuki; Akiyama, Junko; Bhuiyan, Mohammad Musharraf Uddin; Fukui, Yutaka; 福井, 豊.
The aim of this study was to confirm the effect of dithiothreitol (DTT)-treated spermatozoa on oocyte activation following intracytoplasmic sperm injection (ICSI). Boar spermatozoa with or without DTT treatment (5 mM, 30 min) were injected into in vitro matured porcine oocytes, and the nuclear phase in presumptive zygotes was observed at 3 h intervals up to 12 h after ICSI. Furthermore, developmental competence of embryos produced by DTT-treated or non-treated spermatozoa was monitored after cultivation in vitro for 144 h. Male and female pronuclear formation rates in the oocytes injected with DTT-treated spermatozoa were significantly (P < 0.05) higher than those in the oocytes injected with non-treated spermatozoa. Additionally, we observed that...
Palavras-chave: Assisted reproductive technology; Dithiothreitol; Intracytoplasmic sperm injection; Oocyte activation.
Ano: 2009 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/2803
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Factors Affecting the Fertility of Ewes after Intrauterine Insemination with Frozen-Thawed Semen During the Non-Breeding Season OAK
FUKUI, Yutaka; KOHNO, Hirohide; OKABE, Kentaro; KATSUKI, Sara; YOSHIZAWA, Masahiro; TOGARI, Tetsuro; WATANABE, Hiroyuki; 福井, 豊.
In this study, two successive field trials were conducted during the non-breeding season to investigate various factors affecting on fertility of Suffolk ewes after intrauterine insemination with frozen-thawed semen. In the first year (Experiment 1), three sperm numbers per insemination dose (0.25, 0.5 and 1 million sperm) and five sheep farms were used, and in the second year (Experiment 2), parity, age, body weight, body condition score (BCS) and postpartum days were investigated to compare pregnancy and lambing rates. High pregnancy and lambing rates (70.6 and 70.6%, respectively) were obtained with 0.25 million sperm per dose. There were no significant differences in the pregnancy and lambing rates among the five farms, but there was a tendency for one...
Palavras-chave: Artificial insemination; Fertility; Frozen semen; Sheep.
Ano: 2010 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/2817
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Further studies on factors affecting in-vitro maturation of extra-follicular bovine oocytes OAK
Fukui, Yutaka; Fujii, Katsumi; Kumata, Mitsuru; Imai, Kei; Alfonso, Noel M.; Ono, Hitoshi; 福井, 豊; 藤井, 勝己; 久万田, 満; 今井, 敬; 小野, 斉.
Ano: 1986 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/1500
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In vitro maturation of bovine oocytes recovered from follicles of various sizes OAK
Fukui, Yutaka; Fukushima, Moriyuki; Ono, Hitoshi; 福井, 豊; 福島, 護之; 小野, 斉.
Ano: 1985 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/1463
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Injection法で作出されたウシ体細胞クローン胚の移植試験 OAK
福井, 豊; Fukui, Yutaka.
Ano: 2003 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/2183
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Lowered maturation rates of bovine follicular oocytes cultured in vitro after one-day storage OAK
Fukui, Yutaka; Terawaki, Yoshinori; Ono, Hitoshi; 福井, 豊; 寺脇, 良悟; 小野, 斉.
Ano: 1984 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/1448
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Production of Sei Whale (Balaenoptera borealis) Cloned Embryos by Inter- and Intra-Species Somatic Cell Nuclear Transfer OAK
BHUIYAN, Mohammad Musharraf Uddin; SUZUKI, Yo; WATANABE, Hiroyuki; LEE, Eunsong; HIRAYAMA, Hiroki; MATSUOKA, Koji; FUJISE, Yoshihiro; ISHIKAWA, Hajime; OHSUMI, Seiji; FUKUI, Yutaka; 福井, 豊.
The objectives of this study were to choose an effective embryo reconstruction method and an effective post-activation agent for in vitro production of sei whale (Balaenoptera borealis) interspecies somatic cell nuclear transfer (iSCNT) embryos. Moreover, trichostatin A (TSA) treatment of whale iSCNT embryos was performed to improve the in vitro embryo development. In Experiment 1, the fusion rate was significantly higher (88.1%) in embryos reconstructed using the intracytoplasmic cell injection method (ICI) than that (48.7%) in the subzonal cell insertion (SUZI) counterpart. The rates of pseudopronucleus (PPN) formation (77.4 vs. 77.2%) and cleavage (24.5 vs. 37.0%) did not vary between ICI and SUZI. However, the PPN formation and cleavage rates were...
Palavras-chave: Interspecies; Somatic cell nuclear transfer; Whale.
Ano: 2010 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/2815
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The Pattern of Ovarian Development in the Prepubertal Antarctic Minke Whale (Balaenoptera bonaerensis) OAK
TETSUKA, Masafumi; ASADA, Masatsugu; MOGOE, Toshihiro; FUKUI, Yutaka; ISHIKAWA, Hajime; OHSUMI, Seiji; 手塚, 雅文; 福井, 豊.
This study describes the morphological and morphometrical changes associated with prepubertal ovarian development in the Antarctic minke whale (Balaenoptera bonaerensis). Ovaries were harvested from 94 immature minke whales caught in the Antarctic Ocean during the summer feeding season (December-March). Notable differences in ovarian size and morphology were found among animals. Up to 10 folds difference in ovarian weight was found among prepubertal whales of similar body size. During the prepubertal period, ovaries grew slowly and approximately doubled their weight. The morphologies of right and left ovaries were almost identical while the growth of the ovary appears to occur preferentially on the right side. The most striking morphological feature was...
Palavras-chave: Whale; Minke whale; Ovarian development.
Ano: 2004 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/3034
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めん羊の定時人工授精に関する研究 OAK
福井, 豊.
Ano: 1989 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/469
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ウシの嚢腫卵胞と正常様卵胞における卵胞液中のプラスミノーゲンおよぴその他化学成分について OAK
福井, 豊; 石黒, 明裕; 福島, 護之; 寺脇, 良悟; 小野, 斉; Fukui, Yutaka; Ishiguro, Akihiro; Fukushima, Moriyuki; Terawaki, Yoshinori; Ono, Hitoshi.
Ano: 1983 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/1425
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ウシ体外成熟卵子の単為発生に関する基礎研究 OAK
福井, 豊.
Ano: 1992 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/502
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ウシ卵胞内卵子の体外成熟と体外受精におよぽす卵胞培養時間の影響 OAK
福井, 豊; 田邊, 亮一; 青柳, 敬人; 小野, 斉; Fukui, Yutaka; Tanabe, Ryoichi; Aoyagi, Yoshito; Ono, Hitoshi.
Ano: 1987 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/1520
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ウシ卵胞内卵子の体外成熟に関する研究 OAK
福井, 豊.
Ano: 1981 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/372
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グリセリンと蔗糖を用いたマウス胚の急速凍結法に関する研究 OAK
福井, 豊; 西田, 美恵子; 青柳, 敬人; 小野, 斉; Fukui, Yutaka; Nishida, Mieko; Aoyagi, Yoshito; Ono, Hitoshi.
Ano: 1987 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/1521
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単一合成培地を使用した個別培養法を用いた体外胚生産によるウシ卵胞内環境と卵母細胞の形態が及ぼす胚発生能への環境の解明 OAK
福井, 豊; Fukui, Yutaka.
Ano: 2005 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/2182
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第10回国際家畜繁殖・人工授精学会出席と米国の大学・研究所視察 OAK
福井, 豊.
Ano: 1985 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/400
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第14回国際家畜繁殖学会での研究成果発表及び中家畜の繁殖シンポジウム出席並びに当分野の学術交流 OAK
福井, 豊.
Ano: 2001 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/594
Registros recuperados: 21
Primeira ... 12 ... Última
 

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