시판 유통 김의 미생물 오염도, 사전 살균처리 및 전자선 조사 여부 확인

• Published in: Han'guk Sikp'um Kwahakhoe Chi = Korean Journal of Food Science and Technology Vol. 49; no. 1; pp. 20 - 27
• Main Authors: 이은진(Eun-Jin Lee), 김귀란(Gui-Ran Kim), 이혜진(Hye-Jin Lee), 권중호(Joong-Ho Kwon)
• Format: Journal Article
• Language: Korean
• Published: Seoul 한국식품과학회 01.02.2017; Korean Society of Food Science & Technology
• Subjects: Coliforms; Contamination; Decontamination; Environmental monitoring; Irradiation; Luminescence; Microbial contamination; Microorganisms; Minerals; Optical properties; Porphyra; Radiation; Thermoluminescence; Yeast; 식품과학; microbial contamination; DEFT/APC; dried laver; PSL/TL; irradiation
• ISSN: 0367-6293; 2383-9635
• DOI: 10.9721/KJFST.2017.49.1.20

Eighteen commercial laver (Porphyra sp.) products were purchased from Korean market and were monitored for their microbial contamination, pre-decontamination, and luminescence properties. The laver samples showed considerable variation in their microbial contamination, from 10-107 CFU/g of total aerobic counts, <10-102 CFU/g of coliforms in 4 dried laver samples, and <10-106 CFU/g of yeasts and molds except in 3 samples. In addition, 102 CFU/g of Bacillus cereus was found in one sample. DEFT/APC analysis was suitable for demonstrating whether the samples were pre-decontaminated or not, with DEFT/APC values lower than 2.0 log for non-heated samples and 1.0-8.5 log for heatprocessed samples. In photostimulated luminescence (PSL) calibration, 15 samples irradiated at 1 kGy showed positive (irradiated) values more than 5000 PCs. Furthermore, thermoluminescence (TL) analysis by separating the marker minerals from samples revealed the potential to be employed in identifying irradiation status by determining 1st TL glow at 125- 175°C and TL ratio (TL1/TL2) of all the samples.