【摘要】 硒、铬、锌是人体必需的具有一定功能作用的微量营养元素,有机态微量元素吸收迅速且安全,吸收率高。研究了保加利亚乳杆菌对硒、铬、锌通过生物转化将无机态微量元素富集转化为细胞内的有机态微量元素,结果表明:适当提高培养基中硒、铬、锌的浓度,有利于保加利亚乳杆菌的生长和微量元素有机态的富集转化;但是当硒浓度超出一定范围时,则抑制保加利亚乳杆菌的生长。这3种元素中,保加利亚乳杆菌对锌的富集转化能力最强,铬次之,而对硒的富集转化能力最弱。更多还原

【Abstract】 The selenium, chromium and zinc are the essential trace elements with certain functions to the human body. The organic state trace elements are easy and safe to be absorbed by human and their absorption rates are higher than in inorganic state. L. bulgaricus was cultured in the medium with selenium, chromium and zinc. The inorganic state trace elements were changed into the organic state trace elements through bio-transformation. The results showed that improving the concentration of the trace element properly is favorable to the growth of L. bulgaricus and to the enrichment and bio-transformation of trace elements. It is also seen that when the concentration of the selenium exceeds certain level, the growth of L. bulgaricus is suppressed. Among the three elements, L. bulgaricus has the strongest enriching ability for zinc, followed by chromium and the selenium.更多还原