@article{oai:rakuno.repo.nii.ac.jp:00003201,
 author = {阿部, 友香 and トスカーアレン, 賢太 and 樋口, 豪紀 and 永幡, 肇},
 issue = {1},
 journal = {日本畜産学会報},
 month = {Feb},
 note = {Article, 搾乳過程および分房乳の体細胞数が泌乳牛の生乳の衛生学的および理化学的性状に及ぼす影響を検討する目的で，前搾り乳中の体細胞数10万/mL未満，10～30万/mL, 50～400万/mLおよび1000万/mL以上の分房乳について，体細胞数，総菌数，乳成分，N-アセチル-β-グルコサミニダーゼ（NAGase），乳酸脱水素酵素（LDH）活性および乳タンパク分析を実施した．体細胞数10万/mL未満，10～30万/mLおよび50～400万/mLの分房乳において搾乳過程に伴い体細胞数に有意な（P ＜ 0.05）増加が認められた．乳脂肪率も体細胞数と同様の推移を示し体細胞数10万/mL未満および10～30万/mLの2群で有意な（P ＜ 0.05）増加を認めた．カゼイン濃度は搾乳過程において漸減し，体細胞数10～400万/mLおよび1000万/mL以上の分房乳で減少した．NAGaseおよびLDH活性は後搾り乳で増高した．搾乳過程および体細胞数により生乳の衛生学的ならびに理化学的性状の変化が確認され高体細胞乳でその変化は増大することから供試乳の採取ならびにその取扱いに留意が必要である． To evaluate the e ects of milking process and somatic cell count (SCC) of milk on the changes in the hygiene and physicochemical parameters of quarter raw milk from lactating dairy cows. We measured the bacterial counts, milk composition,and N-acetyl- -glucosaminidase (NAGase) and lactate dehydrogenase (LDH) activities of quarter milk with di erent SCCs : 10×10 cells/mL-, 10-30×10^4 cells/mL, 50-400×10^4 cells/mL, and ＞1,000×10^ cells/mL. Results : Changes in SCC values were significantly (P＜ 0.05) higher in milk with SCCs of ＜10×10^4 cells/mL, 10-30×10^4 cells/mL and cells/mL. Milk fat content was significantly higher ( P＜ 0.05) in milk with SCCs of ＜10×10^4 cells/mL and 10-30×10^4 cells/mL. The concentration of casein in milk decreased gradually during the milking process, and an apparent decrease was found in milk with SCCs of ＜10×10^4 cells/mL and 10-30×10^4 cells/mL. Changes in NAGase and LDH activities in milk increased in association with the milking process. SCCs were found to be related to the hygiene and physicochemical parameters of milk ; this was evident from the increment of SCC during the milking process. Conclusion : The present results indicate the importance of establishing hygiene measures and understanding the characteristics of raw milk.},
 pages = {35--43},
 title = {泌乳牛における分房乳の衛生学的ならびに理化学的性状に及ぼす搾乳過程および体細胞数の影響},
 volume = {82},
 year = {2011}
}