摘要
牛初乳IGF-I的模拟胃肠液稳定性研究表明,分离的牛初乳IGF-I在模拟胃液中的稳定性随胃液pH值的升高而增加,0.5～4h内,胃液pH值为2,3,4时的活性保留率变化范围分别为40.25%～0.25%,50.40%～0.60%和93.34%～8.40%;初乳乳清粉中的IGF-I对胃液消化的耐受性远远强于分离的IGF-I,相同条件下,pH值为2,3,4时的活性保留率变化范围分别为67.72%～45.14%,84.59%～58.41%和94.21%～63.35%。分离的牛初乳IGF-I对pH值为8的模拟肠液的耐受性相对较差,0.5～4h内活性保留率变化范围为33.20%～0.46%,而初乳乳清粉中的IGF-I活性保留率变化范围为87.80%～24.28%。
The stability of bovine colostrums IGF-I （bc-IGF-I） was increased with pH value of artificial gastric succus. The activity of IGF-I at pH=2,3,4 between 0.5h and 4h varied from 40.25% to 0.25%,50.40% to 0.60% and 93.34% to 8.40%, respectively. The activity of iGF-I in colostrums whey power were higher and ranged from 67.72% to 45.14%,84.59% to 58.41% and 94.21% to 63.35% at the same condition. The stability of bc-IGF-I was relatively poor in artificial intestinal succus and the retention rate changed from 33.20% to 0.46%, but the value for IGF-I in colostrums whey power were from 87.80% to 24.28%.
出处
《中国乳品工业》
CAS
北大核心
2008年第9期4-6,58,共4页
China Dairy Industry
基金
国家自然科学基金(30571313)
关键词
牛初乳IGF—I
模拟人工胃肠液
稳定性
bovine colostrums insulin-like growth factor-I
artificial gastric and intestinal succus
stability
