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Registros recuperados: 12
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A preliminary study on origin of Callosciurus squirrels introduced into Japan OAK
Oshida, Tatsuo; Torii, Harumi; Lin, Liang-Kong; Lee, Jen-Kai; Chen, Yean-Jen; Endo, Hideki; Sasaki, Motoki; 押田, 龍夫; 佐々木, 基樹.
To examine the origin of Callosciurus erythraeus introduced to Japan, we compared mitochondrial DNA control region sequences of eight haplotypes from Japan with those of 42 haplotypes from Taiwan. There were two distinct phylogroups in Japan. Six haplotypes from Japan were included in the Taiwan population, suggesting that they could have been introduced from Taiwan. Two haplotypes, however, were distantly related to the cluster consisting of all Taiwanese haplotypes and six Japanese haplotypes. The uncorrected genetic distances (5.2-5.7%) between these two haplotypes and the out-group (Callosciurus finlaysonii from Laos) were less than those (8.3-9.8%) between these two haplotypes and the cluster consisting of the other six Japanese haplotypes and all...
Palavras-chave: Alien squirrel; Callosciurus erythraeus; Callosciurus finlaysonii; Mitochondrial DNA control region; Taiwan.
Ano: 2007 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/3039
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Classification of the seminiferous epithelial cycle in the sika deer (Cervus nippon) OAK
Hayakawa, Daisuke; Sasaki, Motoki; Suzuki, Masatsugu; Igota, Hiromasa; Kitamura, Nobuo; 佐々木, 基樹; 北村, 延夫.
Ano: 2009 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/4131
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Immunohistochemical localization of the cytoskeletal proteins in the testes of the lesser mouse deer (Tragulus javanicus) OAK
Sasaki, Motoki; Endo, Hideki; Kimura, Junpei; Rerkamnuaychoke, Worawut; Hayakawa, Daisuke; Bhuminand, Devkota; Kitamura, Nobuo; Fukuta, Katsuhiro; 佐々木, 基樹; 北村, 延夫.
Ano: 2010 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/4132
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Localization of alpha 1-2 Fucose Glycan in the Mouse Olfactory Pathway OAK
Kondoh, Daisuke; Kamikawa, Akihiro; Sasaki, Motoki; Kitamura, Nobuo.
Glycoconjugates in the olfactory system play critical roles in neuronal formation, and alpha 1-2 fucose (alpha 1-2Fuc) glycan mediates neurite outgrowth and synaptic plasticity. Histochemical findings of a1-2Fuc glycan in the mouse olfactory system detected using Ulex europaeus agglutinin-I (UEA-I) vary. This study histochemically assessed the main olfactory and vomeronasal pathways in male and female ICR and C57BL/6J mice aged 3-4 months using UEA-I. Ulex europaeus agglutinin-I reacted with most receptor cells arranged mainly at the basal region of the olfactory epithelium. The olfactory nerve layer and glomerular layer of the main olfactory bulb were speckled with positive UEA-I staining, and positive fibers were scattered from the glomerular to the...
Palavras-chave: Alpha 1-2 Fucose; Anterior olfactory nucleus; Glycosylation; Lateral olfactory tract; Olfactory bulb; Olfactory epithelium; Olfactory tubercle; Piriform cortex; Ulex europaeus agglutinin-I; Vomeronasal epithelium.
Ano: 2017 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/4576
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Mitochondrial DNA Evidence Suggests Challenge to the Conspecific Status of the Hairy-Footed Flying Squirrel Belomys pearsonii from Taiwan and Vietnam OAK
Oshida, Tatsuo; Lin, Liang-Kong; Chang, Shih-Wei; Dang, Can Ngoc; Nguyen, Son Truong; Nguyen, Nghia Xuan; Nguyen, Dang Xuan; Endo, Hideki; Kimura, Junpei; Sasaki, Motoki; Hayashida, Akiko; Takano, Ai; 押田, 龍夫; 佐々木, 基樹.
Ano: 2015 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/4247
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Phylogenetic Position of Callosciurus erythraeus griseimanus from Vietnam in the Genus Callosciurus full access OAK
Oshida, Tatsuo; Can Ngoc, Dang; Son Truong, Nguyen; Nghia Xuan, Nguyen; Endo, Hideki; Kimura, Junpei; Sasaki, Motoki; Hayashida, Akiko; Takano, Ai; Koyabu, Daisuke; Hayash, Yoshihiro; 押田, 龍夫; 佐々木, 基樹.
Ano: 2013 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/4112
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Polysplenia syndrome with duodenal and pancreatic dysplasia in a Holstein calf : A case report OAK
Kondoh, Daisuke; Kawano, Tomomi; Kikuchi, Tomoaki; Hatate, Kaoru; Watanabe, Kenichi; Sasaki, Motoki; Yamagishi, Norio; Inokuma, Hisashi; Kitamura, Nobuo.
Background: Laterality disorders of the abdominal organs include situs inversus totalis that mirrors the arrangements of all internal organs and heterotaxy syndrome (situs ambiguus) in which the thoracic or abdominal organs are abnormally arranged. Heterotaxy is often accompanied by multiple congenital malformations, and it generally comprises asplenia and polysplenia syndromes. To our knowledge, polysplenia syndrome has been reported in only three cattle, and computerized tomographic (CT) images of these animals were not obtained. Case presentation: A six-month-old Holstein heifer had ruminal tympani and right abdominal distension. CT imaging showed that the rumen occupied the right side of the abdominal cavity, the omasum and abomasum occupied the left...
Palavras-chave: Cattle; Duodenum; Dysplasia; Heterotaxy; Laterality disorder; Malposition; Pancreas; Polysplenia.
Ano: 2017 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/4563
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Preliminary study on phylogeography of Callosciurus prevostii in Southeast Asia : mitochondrial DNA evidence supports riverine barrier hypothesis OAK
Oshida, Tatsuo; Yasuda, Masatoshi; Sasaki, Motoki.
Evolutionary history of Callosciurus squirrel species seems affected by geographical-isolation by huge rivers in Southeast Asia. Geographical isolation by rivers may have influenced phylogeographical structure between and within Callosciurus species. In Sundaland, Southeast Asia, however, phylogeographical structure within Callosciurus species may be explained by geographical isolation among islands. In a test of the effects of rivers and islands, we examined phylogeographical characteristics of C. prevostii based on mitochondrial cytochrome b gene sequences. This squirrel is distributed from peninsular Thailand to Sumatra and Borneo and adjacent small islands. We collected specimens from four geographically different populations (the Malay Peninsula,...
Palavras-chave: Cytochrome b; Geographical isolation; Prevost's squirrel; Sumatra Island.
Ano: 2016 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/4470
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The developmental plasticity of colocalization pattern of peptide YY and glucagon-like peptide-1 in the endocrine cells of bovine rectum OAK
Asadullah, Hamid,Pyarokhil; Ishihara, Miyuki; Sasaki, Motoki; Kitamura, Nobuo; 佐々木, 基樹; 北村, 延夫.
Peptide YY (PYY) and glucagon-like peptide-1 (GLP-1) are produced in endocrine cells that show distal distribution in each of small and large intestine. They are colocalized in the same endocrine cells at different ratios depending on the animal species. The present study examined the possibility of plasticity in the colocalization pattern in the bovine rectum, which is known to contain endocrine cells at a high concentration. Consecutive sections from different pre- and postnatal stages were stained immunohistochemically. The immunoreactive (IR) cells were divided into three groups: 1) cells IR for both PYY and GLP-1 (PYY/GLP-1-IR cells), 2) cells IR only for PYY (PYY-IR cells), and 3) cells IR only for GLP-1 (GLP-1-IR cells). The percentage of...
Ano: 2012 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/3854
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The Lamination of the Masseter Muscle in the Water Deer ( Hydropotes inermis ) OAK
Sasaki, Motoki; Kimura, Junpei; Sohn, Joonhyuk; Nasu, Tetsuo; Kitamura, Nobuo; Yasuda, Masahiro; 佐々木, 基樹; 北村, 延夫.
Ano: 2013 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/4133
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The origin and early evolution of lactation, a new hypothesis proposed by Olav T. Oftedal OAK
浦島, 匡; 上村, 祐介; 中村, 正; 佐々木, 基樹; Urashima, Tadasu; Uemura, Yuhsuke; Nakamura, Tadashi; Sasaki, Motoki.
ペンシルバニア紀(>3億1000万年前)に,有羊膜類であるSynapsidは他の系統から分化し,腺を発達させた。乳腺は毛包と会合した祖先型アポクリン腺から発達した。乳腺と毛の関係は単孔類の乳腺に保持されている。また,有袋類における乳腺毛の初期個体発生時の存在とその後の退化に,その証拠が残されている。単孔類の乳頭のない乳腺区分にあるmammo-ピロ-脂腺単位の密集した集団は,透水性を示す卵への水分や他の成分の補給のための構造的進化を反映しているかもしれない。ラクトースなどの成分は,初期Synapsidの祖先アポクリン腺から分泌されていたかもしれない。三畳紀のTherapsidは,複雑な栄養成分を含む乳を分泌し,卵サイズを小さくし,孵化時の新生子の未熟化を引き起こした。乳腺区分に生じた乳頭は,乳腺の毛を退化させた。 乳腺分泌は,羊皮状の卵殻をもつ卵を産むSynapsidで開始されたと考えられる。羊皮状の卵殻をもつ卵は,低湿度の空気にふれた際,急速に水分損失を被る。Synapsidは抱卵嚢の中で抱卵することで卵の乾燥を防いだが,これは母親の行動を制限した。羊皮状の卵殻をもつ卵は,殻を通して液体水分を補給することができる。乳腺分泌は,本来卵に水分を供給する手段として開始され,Cynodont (キノドン類)において内温性獲得の要因となった。Synapsidの卵は,ナトリウムやカルシウムイオンなどの栄養素を摂取した可能性がある。孔のある卵殻と2層性の卵黄膜は,子宮内での分泌物と抱卵時での乳腺分泌物の摂取を促進したと考えられる。
Ano: 2004 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/2924
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哺乳類標本作製と管理の今 OAK
佐々木, 基樹; 遠藤, 秀紀; 山田, 格; 田島, 木綿子; Sasaki, Motoki; Endo, Hideki; Yamada, Tadasu K.; Tajima, Yuko.
https://www.jstage.jst.go.jp/article/mammalianscience/53/1/53_178/_article/-char/ja/
Ano: 2013 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/3860
Registros recuperados: 12
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