食品与机械2018，Vol.34Issue(1)：62-66,5.DOI:10.13652/j.issn.1003-5788.2018.01.012
LED蓝光与柠檬酸对大肠杆菌的协同抗菌作用
The synergistic antibacterial effect of LED blue light and citric acid against Escherichia coli
摘要
Abstract
In order to develop a novel antibacterial method of food,the influences of the illumination intensity of LED blue light,the mass concentration of citric acid and temperature on the antibacterial property of Escherichia coli O157:H7 in nutrient broth were studied.The results demonstrated that under low temperature (12 ℃),the effect of LED blue light on the antibacterial property of Escherichia coli O157:H7 was better than that under room temperature (25 ℃),and the antibacterial efficiency increased with the increase of illumination intensity.Under low temperature,the influence of citric acid on E.coli O157:H7 was weak,but under room temperature it could obviously slow down its growth rate.Compared with the control group,after exposure to the LED blue light with an illumination in tensity of 4 072.3 J/cm2,the number of E.coli O157:H7 under the low temperature decreased by (2.60 ± 0.19) lg CFU/mL,while the number only decreases by (0.67±0.12) lg CFU/mLunder the room temperature.After adding citric acid,the antibacterial effect of LED blue light was significantly enhanced.After exposed to the LED blue light with an illumination intensity of 2 471.0 J/cm2,the number of E.coli O157:H7 under the low temperature decreased by (5.13± 0.11) lg CFU/mL,while it decreased by (3.08 ± 0.11) lg CFU/mL under the room temperature.关键词
LED蓝光/柠檬酸/大肠杆菌O157:H7/协同作用Key words
LED blue light/citric acid/Escherichia coli O157 : H7/synergistic effect引用本文复制引用
俞建峰,夏晓露,崔政伟,陈健,张楚唯..LED蓝光与柠檬酸对大肠杆菌的协同抗菌作用[J].食品与机械,2018,34(1):62-66,5.基金项目
中央高校基本科研业务费专项(编号:JUSRP51634B) （编号:JUSRP51634B）
2017年江苏省研究生实践创新计划项目(编号:SJCX17_0484) （编号:SJCX17_0484）
2017年江苏省大学生创新创业训练计划项目(编号:2017126Z) （编号:2017126Z）
