摘要
共轭亚油酸(CLA)是亚油酸的一组几何和位置异构体,具有多种生理功能。反刍动物肉、乳制品是c9,t11-CLA丰富的天然来源。本研究用气相色谱法测定青海、甘南、天祝和肃北4个不同牧区牧民自制酸奶中c9,t11-CLA的含量,并与市售酸奶和牦牛乳中的含量进行对比。结果表明:采用该方法使牧区酸奶中c9,t11-CLA得到很好的分离,测得青海、甘南、天祝和肃北牧区酸奶中c9,t11-CLA的含量分别为1.007、0.782、0.987、1.196mg/ml酸奶;牧区自制酸奶中c9,t11-CLA的含量与市售酸奶中的含量差异不显著(p>0.05);但含量极显著低于牦牛乳(p<0.01)。
Conjugated linoleic acid （CLA） is a class of positional and geometric isomers oflinoleic acid, which possesses variety of biological properties. The abundant crude source of c9, t11-CLA is dairy products and meat products of ruminants. The c9, t11-CLA contents in self-made yoghourts by the herdsmen from Qinghai, Gannan, Tianzhu and Subei pastoral areas were determined by using gas chromatography, and they were compered with contents of saled yoghourt and yak milk. Results showed that c9, t11-CLA is separated well. The c9, t11-CLA content in the self-made yoghourts by the herdsmen from Qinghai and Gannan, Tianzhu, Subei pastoral areas are 1.007, 0.782, 0.987 and 1.196 mg/ml yoghourt respectively. The c9, tl 1-CLA contents in the self-made yoghourts do not show notable difference to that in saled yoghourt （p〉0.05）, but the c9, t11-CLA contents in all the yoghourts are significantly lower than that in yak milk （p〈0.01）.
出处
《食品科学》
EI
CAS
CSCD
北大核心
2008年第11期521-523,共3页
Food Science
基金
甘肃牧区酸奶中益生菌的分离鉴定及开发应用项目(0702-12)
