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KMID : 0665420100250020207
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Korean Journal of Food Culture
2010 Volume.25 No. 2 p.207 ~ p.215
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Microbiological Analysis and Antioxidant Activity of Tomato Sauce Prepared with Various Herbs
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Kim Jang-Ho
Yoo Seung-Seok
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Abstract
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The purpose of this study was to investigate the microbiological characteristics and antioxidant activity of tomato sauce in terms of the variety of herbs that have been widely used in Western cuisine. As storage time increases, the number of total microbes changes, but the bacteria count was in the range of 1.0×101-2.1×102, which did not increase much over 60 days of storage. The reason seems to be that the amount of heat treatment undergone by this type of sauce type, and its acidity make for difficult conditions for microbes to live. Yeast and mold measurements showed that yeast and mold were not detected for up to 30 days of storage in the tomato sauce with various types and amounts of added herbs. After 45 and 60 days, the yeast and mold count was in the range of 1.0×101-8.5×101, and the same in the control. Measurements of phenolic compounds in 60 days of storage showed that tomato sauce with different types and amounts of added herbs had the lowest amounts relative to the control for all storage periods. The more herbs that were added, the higher the phenolic compounds resulted. As storage times increase, the phenolic compounds showed a tendency to decline. The DPPH radical scavenging effects of the tomato sauce herbs added showed a tendency to increase antioxidant activity when more herbs were added. The microbiology results of the storage test of tomato sauce with added herbs showed that the amount of microorganisms in tomato sauce with added herbs did not increase much in 60 days of storage at 4oC. The amount of icroorganisms was small, so tomato sauce with added herbs can be used for 2 months with refrigeration.
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KEYWORD
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microbiological analysis, tomato sauce, herbs, radical scavenging effects, phenolic compounds
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