牛奶中大肠菌群的耐压性研究

A Study on the Pressure-Resistance of Coliform Group in Raw Milk

1.
State Key Laboratory of Superhard Materials, Jilin University, Changchun 130023, China;
2.
Department of Environmental Science, Jilin University, Changchun 130022, China

摘要: 在20 ℃及0.1~430 MPa压力范围内，不同的静水压力与不同的保压时间相结合，对接种了大肠菌群的牛奶做高压处理，研究大肠菌群的耐压性。结果表明：40 MPa压力难以杀死大肠菌群；100 MPa压力持续5 min，大肠菌群中70%以上的细菌死亡；直到430 MPa，大肠菌群中仍有少量耐压细菌存活。
- 牛奶 /
- 大肠菌群 /
- 静水压
Abstract: In order to investigate the pressure-resistance of the coliforms, the milk samples inoculated with coliforms were treated at 20 ℃ and the pressures ranging from 0.1 to 430 MPa for 5 or 15 min. Results show that the most coliforms can survive at 40MPa.More than 70% of the coliforms, however, were killed under pressure of 100 MPa for 5 min. A few of pressure-proof coliforms still survived at pressures up to 430 MPa.
- milk /
- coliform group /
- hydrostatic pressure