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A biochemicalstudy on high quality beef production and its mechanism

优质牛肉生产及其机理的生化研究

基本信息

批准号：
02304028
负责人：
KAWASHIMA Ryoji
金额：
$ 7.1万
依托单位：
KYOTO UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Co-operative Research (A)
财政年份：
1990
资助国家：
日本
起止时间：
1990 至 1992
项目状态：
已结题

项目摘要

In a series of this experiment, nutritional and physiological factors to improve meat quality were studied.A half of 100 heads of Japanese Black steer were judged to be vitamin A deficient because the livers from these animals contained less than 1.0ug/g of vitamin A. On the other hand, Holstein steers were not vitamin A deficient because the livers from the animals contained vitamin A by the factor of 5 to 12 times as compared with the livers from Japanese Black steers. However, liver vitamin A content of Holstein steers tended to be lower in 1991 as compared with that in 1990. There appeared to be no vitamin E deficiency and no difference in Liver and plasma vitamin E concentration between Japanese Black steers and Holstein steers. A significant negative correlation was found between liver vitamin A contents abd beef marbling scores (BMS) and a significal positive correration was found between liver vitamin A contents and beef color scores (BCS) in Japanese Black steers. There was also a significant positive correlation between plasma vitamin E concentrations and BCS in Japanese Black steers.The results suggested that fat-soluble vitamins affected beef quality. At present time, the reason why vitamin A deficiency improves beef quality is studied by using cultured fat cells and by measuring fat cell number and volume in vitamin A deficient cattle.The effects of middle chain fatty acids on body composition and fatty acid composition in the liver in rats and the effects of combination of beta-agonist and thyroxine on body composition and lipid metabolism in rats were also studied from the viewpoint of manupilating lipid content in muscle.

在一系列实验中，对改善肉质的营养和生理因素进行了研究。100头日本黑牛肝脏中，有一半被判定为维生素A缺乏症，因为这些动物的肝脏中维生素A含量低于1.0ug/g。另一方面，荷斯坦牛并不缺乏维生素A，因为这些动物的肝脏中维生素A含量是日本黑牛肝脏的5至12倍。驾驶。然而，与1990年相比，1991年荷斯坦公牛的肝脏维生素A含量呈下降趋势。日本黑公牛和荷斯坦公牛之间似乎没有维生素E缺乏症，肝脏和血浆维生素E浓度也没有差异。日本黑阉牛的肝脏维生素A含量与牛肉大理石花纹评分(BMS)之间存在显着负相关，而肝脏维生素A含量与牛肉颜色评分(BCS)之间存在显着正相关。日本黑牛血浆维生素E浓度与BCS也呈显着正相关。结果表明脂溶性维生素影响牛肉品质。目前，通过培养脂肪细胞并测量维生素A缺乏牛的脂肪细胞数量和体积，研究了维生素A缺乏改善牛肉品质的原因。还从操纵的角度研究了中链脂肪酸对大鼠身体成分和肝脏脂肪酸成分的影响以及β-激动剂和甲状腺素联合对大鼠身体成分和脂质代谢的影响。肌肉中的脂质含量。