文章基本信息

标题：A Study on Deep-Freezing of Cream
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作者：Asuman Gürsel ; Ülker Pamuk ; Ebru Şenel 等
期刊名称：Gida : Journal of Food
印刷版ISSN：1300-3070
电子版ISSN：1309-6273
出版年度：2006
卷号：31
期号：3
出版社：Association of Food Technology, Turkey
摘要：This study was conducted to investigate the keeping quality of cream by deep-freezing and to reveal some properties of butter made from it. Some chemical and microbiological analysis were carried out in the deep-frozen creams stored for 90 days at (i) -18°C and (ii) -25°C and the values compared with that of the cream kept at 5°C. Acidity development was effectively controlled in the deep-frozen cream samples. Acid degree value was the same on day 90 as initially found in the cream sample kept at - 25°C but increased considerably in the control sample. Peroxide number was lower in the deep-frozen cream samples than in the control sample. Counts of yeast and mould were lower than the counts initially determined in the deep-frozen creams due possibly to the effect of ice crystals formed during freezing. From the results, it was revealed that standard quality butter could be made by using deep-frozen cream.
关键词：Keeping quality of cream; deep-freezing; butter manufacture ;