臭氧处理稻谷储藏过程中微生物的变化规律 - 食品科学.pdf

24 2013, Vol.34, No.07 食品科学 ※基础研究 臭氧处理稻谷储藏过程中微生物的变化规律 周建新，林 姣，张 瑞，张杜鹃 (南京财经大学 粮食储运国家工程实验室，江苏 南京 210046) 摘  要：通过模拟储藏，研究臭氧处理稻谷在不同温度储藏过程中水分、细菌总数和霉菌总数的变化规律。结果 表明：臭氧处理能明显降低稻谷微生物含量。臭氧处理的稻谷水分在储藏初期40d 内略有上升，之后基本呈下降趋 势，温度越高，下降幅度越大。臭氧处理的稻谷细菌总数、霉菌总数在15 、20 ℃时基本稳定，而在25 、30 、35 ℃ 时，比储藏前下降较多。另外臭氧处理的稻谷细菌总数、霉菌总数在储藏初期出现反弹现象。方差分析表明：温度 和时间都是储藏稻谷细菌总数或霉菌总数变化的极显著影响因素；进一步的SPSS软件分析表明稻谷细菌总数或霉 菌总数与储藏温度、时间呈显著的二元线性关系。 ： 关键词 臭氧处理；籼稻谷；储藏；细菌总数；霉菌总数；变化 Changes in Microorganism Populations during Storage of Ozone-Treated Paddy ZHOU Jian-xin ，LIN Jiao，ZHANG Rui ，ZHANG Du-juan (National Engineering Laboratory for Food Storage and Transportation, Nanj ing University of Finance and Economics, Nanj ing 210046, China) Abstract ：In the present study, the changing patterns of water content, total bacterial count and mould count during simulated storage of ozone-treated paddy at different temperatures were explored. The counts of microorganisms in paddy could significantly be decreased by ozone treatment. The water content of ozone-treated paddy revealed a slight increase in the first 40 days of storage followed by a general downtrend and declined more obviously at higher storage temperature. Total bacterial count and mould count of ozone-treated paddy basically remained stable during storage at 15 or 20 ℃, but fell more at 25, 30 or 35 ℃ than before storage. Furthermore, at the beginning of storage, both microbiological indicators showed a rebound. Analysis of variance demonstrated that both storage temperature and time had a very significant effect on changes in total bacterial count and mould count, and further statistical analysis using SPSS suggested the linear relati