论文部分内容阅读
采用平板计数法研究了不同浓度的初乳粉溶液对大肠埃希氏杆菌的抑菌效果,结果表明:当初乳粉质量浓度达到10mg/mL时有明显的抑菌效果;初乳粉质量浓度为20mg/mL的溶液,在pH4～9范围内均有抑菌活性,且当pH9时,抑菌率最高(81.6%)。在50～90℃温度范围内对初乳进行热处理,初乳粉溶液的抑菌率以及IgG活性随着热处理温度的升高而降低。
The antibacterial effect of different concentrations of colostrum powder solution on Escherichia coli was studied by plate counting method. The results showed that when the concentration of milk powder reached 10mg / mL, the antibacterial effect was obvious. The colostrum powder concentration was The antibacterial activity was in the range of pH4 ~ 9, and the antibacterial activity was the highest (81.6%) at pH9. The colostrum was heat-treated in the temperature range of 50 ~ 90 ℃. The antibacterial activity and IgG activity of colostrum powder decreased with the increase of heat treatment temperature.