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[文献書誌] Noboru Fujihara & Osamu Koga: "Uptake of αーaminoisobutryric acid (AIB) by rooster spermatozoa" AsianーAustralasian Journal of Animal Science. 3. 91-96 (1990)
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[文献書誌] Yasuhiro Tsuzuki,Noboru Fujihara,Takayuki Mori & Osmau Koga: "The ultrastructural changes of bovine embryos after Freezeーthaw" Science Bulletin of Faculty of Agriculture,Kyushu University. 45. 63-69 (1990)
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[文献書誌] Noboru Fujihara & Osamu Koga: "Observations of the dorsal proctodeum of the cloacae of male ducks (Anas platyrhynchos)" Proceedings of the 4th Conference of WPSA Far East and South Pacific Federation,Taiwan,. 1. 36 (1990)
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[文献書誌] Noboru Fujihara,Hisayoshi Nishiyama & Osamu Koga: "Physiological characteristics of semen and spermatozoa in the domestic bird." Proceedings of 5th AAAP Animal Science Congress,Taiwan. 3. 306 (1990)
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[文献書誌] Noboru Fujihara: "Comparative physiology of avian semen and spermatozoa" Beijing International Symposium on Reproductive Biology. 1. 41 (1990)
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[文献書誌] Noboru Fujihara & Osamu Koga: "Transport of αーaminoisobutryric acid (AIB) into turkey spermatozoa" Life Science AdvancesーPharmacology. 2. (1991)
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[文献書誌] 藤原 昇(分担執筆): "性腺のバイオメカニズム" (株)アイピ-シ-, 24 (1990)