Kim Byoung-Chul, Ryu Youn-Chul, Cho Yoon-Je, Rhee Min-Suk
Division of Food Science, Korea University, Seoul, South Korea.
Biosci Biotechnol Biochem. 2006 Apr;70(4):808-14. doi: 10.1271/bbb.70.808.
This study examined the effect of dietary alpha-tocopheryl acetate on lipid and cholesterol oxidation in retail packed chicken meat during refrigerated storage. Male broiler chicks were randomly assigned to five pens containing 30 chicks each, which was subjected to one of five dietary treatments (0, 50, 100, 200, or 400 IU of alpha-tocopheryl acetate/kg diet). Five different levels of alpha-tocopherol were supplied to the chicks from 3 to 6 weeks. After 42 d of feeding all the broilers were slaughtered, and the carcasses were packed in polyethylene bags individually, bags similar to those used in the retail trade, and stored for 12 d at 4 degrees C. Growth performance and fatty acid composition were not affected by the dietary alpha-tocopherol levels. The alpha-tocopherol content in breast and thigh muscles increased as the level of dietary alpha-tocopherol increased. The supplementation with 200 or 400 IU of alpha-tocopherol was more effective in reducing the level of lipid oxidation (P<0.05) and total cholesterol oxidation products (P<0.05). Therefore, an increase in the dietary alpha-tocopherol level from 200 to 400 IU/kg feed causes major improvements in the oxidative stability of chicken meat during refrigerated storage.
本研究考察了日粮中醋酸生育酚对冷藏零售包装鸡肉中脂质和胆固醇氧化的影响。雄性肉鸡雏随机分配到五个围栏中，每个围栏有30只雏鸡，接受五种日粮处理之一（0、50、100、200或400国际单位醋酸生育酚/千克日粮）。从3周龄到6周龄给雏鸡提供五种不同水平的生育酚。饲养42天后，所有肉鸡屠宰，胴体分别装入聚乙烯袋中，袋子类似于零售行业使用的袋子，并在4℃下储存12天。生长性能和脂肪酸组成不受日粮生育酚水平的影响。胸肌和大腿肌肉中的生育酚含量随着日粮生育酚水平的增加而增加。补充200或400国际单位生育酚在降低脂质氧化水平（P<0.05）和总胆固醇氧化产物（P<0.05）方面更有效。因此，日粮生育酚水平从200国际单位/千克饲料增加到400国际单位/千克饲料可显著提高冷藏期间鸡肉的氧化稳定性。
