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KMID : 1007520020110050507
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Food Science and Biotechnology
2002 Volume.11 No. 5 p.507 ~ p.510
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Screening of Gamma-irradiated Medicinal Herbs by Using a Microbiological Method (DEFT/APC)
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Oh, Kyeung Nam
Lee, Hyun Joo/Yang, Jae Seung
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Abstract
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Methods for the identification of γ-irradiated foods help enforce national and international regulations on labeling to differentiate irradiated or unirradiated products and prevent product irradiation abuse. Direct epifluorescent technique (DEFT) and conventional total aerobic plate count (APC) are used to detect the microorganism distribution in irradiated foods by calculating the difference between the total cell count and the number of living microorganisms. Hwanggis (Astragali radix) from Korea and China, Gamcho (Glycyrrhizae radix), and Yookkae (Cinnamomum camphora) were used in this study and irradiated at 1.0, 3.0, 5.0, 7.0, and 10 kGy. The log DEFT/APC was 2.0 or higher in most samples irradiated at 3.0 kGy or higher and increased with dose increment. The DEFT/APC method can be used to screen the irradiation status of medicinal herbs.
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KEYWORD
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