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Effects of chlorine spray and freezing on the Microbiological quality of maine wild blueberries

机译：氯喷雾和冷冻对缅因州野生蓝莓微生物质量的影响

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摘要

This study examined the influence of two key processing steps, chlorine spray and freezing, on the microbiological characteristics of frozen wild blueberries. Home and garden sprayers were modified to approximate processing conditions. Samples were sprayed with either sterile water or 100 ppm chlorine solution and allowed 30, 60, 120, or 300 second contact times. Microbiological analyses of total aerobes and yeasts were conducted using FDA Standard Methods. ANOVA and Tukey's HSD multiple comparisonswere used to evaluate effectiveness of all treatments. All treatments resulted in statistically significant (P <= 0.05) reductions when compared to initial values. Duration of exposure was not statistically significant. However, no statistically significant dif?ference between samples receiving sterile water or chlorinated water washes was detected. Chlorination and freezing produced a mean log reduction of 1.85 while sterile water and freezing resulted in a reduction of 1.28 logs.
机译：这项研究检查了两个关键加工步骤（氯喷雾和冷冻）对冷冻野生蓝莓微生物特性的影响。修改了家用和花园喷雾器，以适应近似的加工条件。用无菌水或100 ppm氯溶液喷涂样品，并允许30、60、120或300秒的接触时间。使用FDA标准方法对总需氧菌和酵母菌进行了微生物学分析。方差分析和Tukey的HSD多重比较用于评估所有治疗的有效性。与初始值相比，所有处理均导致统计学上显着（P <= 0.05）的降低。接触时间无统计学意义。但是，未检测到接受无菌水或氯化水洗涤的样品之间的统计学差异。氯化和冷冻使平均对数减少1.85，而无菌水和冷冻导致对数减少1.28。

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