桑黄乙醇提取物对乳制品有害菌的抑制作用

利用95％乙醇提取桑黄子实体中抑菌成分,研究不同质量浓度的桑黄乙醇提取物对牛乳中革兰氏阳性菌、阴性菌、霉菌和酵母的抑制作用.结果表明:桑黄乙醇提取物在0.1～5 mg/mL质量浓度下,实现了对牛乳中有害细菌、真菌有效的抑制,能显著控制巴氏牛乳中菌群总数,而对有益菌无显著影响,相对Nisin等抑菌剂具有广谱抑菌性,因此可将其用于生产乳品抑菌剂.

Antimicrobial Activities of Ethanol Extracts from Phellinus baumii.towards Harmful Microorganisms in Dairy Products

Phellinus baumii is a highly-valued medicinal mushroom. In the current study, inhibitory effects of different concentrations of the 95% ethanol extract from Phellinus baumii were examined on Gram-positive, Gram-negative, molds and yeasts. The results showed that the Phellinus baumii ethanol extract at concentrations in the range of 0.1 to 5 mg/mL was effective against the growth of harmful bacteria and fungi and could obviously control the total number of bacteria in milk without having any significant adverse impact on beneficial bacteria. Meanwhile, the extract had a broader antimicrobial spectrum than antimicrobials such as nisin, suggesting its potential application for inhibiting harmful microorganisms in milk and dairy products.