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노유미,이관형,박인철,김완규,한병학,유재홍,안재형,Ro, Yu-Mi,Lee, Gwan-Hyeong,Park, InCheol,Kim, Wan-Gyu,Han, Byeong-Hak,You, Jaehong,Ahn, Jae-Hyung 한국미생물학회 2016 미생물학회지 Vol.52 No.4
전국에서 채취한 사일리지 및 우분 시료로부터 사일리지 첨가제로 사용하기 위한 유산균을 순수 분리하고 그 특성을 조사하였다. MRS 배지에서 성장 속도를 기반으로 16개의 유산균 균주를 순수 분리하였으며 이들은 16S rRNA, RNA polymerase alpha subunit, 60-kDa heat shock protein, phenylalanyl-tRNA synthase alpha subunit 유전자 염기서열에 기반하여 Lactobacillus, Enterococcus, Weissella 속으로 동정되었다. 16균주 중 L. plantarum과 유전적으로 높은 유사도를 보인 균주들은 MRS 배지와 쌀보리 추출배지에서 가장 빠른 성장 및 pH 저하를 나타냈으며 이용 가능한 당 종류 및 생장 가능한 pH, 온도, 염분범위가 상대적으로 넓었다. 또한 이 균주들은 PCR 검사 결과 바이오제닉 아민 생성을 위한 유전자가 없었으며 그 MRS 배지 배양액은 사일리지 부패균에 대한 저해 효과가 상대적으로 큰 것으로 나타나 이 균주들이 우수한 사일리지 첨가제로 사용될 수 있을 것으로 판단된다. 그러나 분리된 모든 유산균들의 쌀보리 추출배지 배양액은 사일리지 부패균의 성장에 큰 영향을 미치지 않거나 오히려 촉진시켰으며 선발된 유산균들을 사일리지 제조에 사용하기 위하여 그 원인 구명과 대책마련이 필요할 것으로 판단된다. Sixteen lactic acid bacterial strains were isolated from silage and cow dung samples, and characterized to identify their potential as silage additives. They were identified as the members of the genera Lactobacillus, Enterococcus, and Weissella, and clustered into nine groups based on the sequences of the genes for 16S rRNA, RNA polymerase alpha subunit, 60-kDa heat shock protein, and phenylalanyl-tRNA synthase alpha subunit. Among them, the three strains which were genetically similar to L. plantarum showed the fastest growth and pH decrease in MRS and rye extract media, the highest numbers of available carbohydrates, and the widest ranges of pH, temperature, and salinity for growth. In addition, they showed no amplified DNA products in the PCR examination targeting the genes for the production of biogenic amines, and the MRS media where they had been cultured showed relatively high inhibition effect against the growth of silage-spoiling microorganisms, including fungi, yeast, and clostridia. The results suggest that these strains are good candidates for silage additives. However, the rye extract media where the lactic acid bacteria had been cultured had no effect on or stimulated the growth of the silage-spoiling microorganisms, and the causes must be established for the practical use of the lactic acid bacteria as silage additives.
안재형(Jae-Hyung Ahn),노유미(Yu-Mi Ro),이관형(Gwan-Hyeong Lee),박인철(InCheol Park),김완규(Wan-Gyu Kim),한병학(Byeong-Hak Han),유재홍(Jaehong You) 한국농약과학회 2016 농약과학회지 Vol.20 No.4
Triazole fungicides occupy an important portion in the global fungicide market and are relatively persistent in soil compared to the other fungicides, suggesting possible adverse effects of the fungicides on human health and environment. In this study, we tried to isolate microorganisms from orchard soils, which can decompose the triazole fungicides, tebuconazole, fluquinconazole, and difenoconazole. Only difenoconazole was completely degraded in the enrichment culture, from which several difenoconazole-degrading bacteria were isolated. They showed the same rep-PCR pattern thus only one strain, C8-2, was further studied. The strain was identified as Sphingomonas sp. C8-2 based on its 16S rRNA gene sequence and decomposed 100 mg/L of difenoconazole in a minimum medium to an unknown metabolite with a molecular weight of 296 within 24 hours. The inhibition effect of the metabolite against representative soil microorganisms significantly decreased compared to that of difenoconazole thus the bacterial strain is expected to be used for the detoxification of difenoconazole in soil and crop.
이명선(Myung Sun Lee),박경옥(Kyoung-Ok Park),이관형(Gwan Hyung Lee) 한국보건교육건강증진학회 2006 보건교육건강증진학회지 Vol.23 No.2
Objectives: Safety is a primary health promotion issue in worksite because injury induces multi-fold loss of the human and economic resources to profit organization. The purposes of this study were to describe worksite health and safety education and management status in Korean manufacturing companies Methods: The original population size of Korean manufacturing industry in 2004 was 74,398 and 2,960 factories were selected by the multiple stratified sampling method for this study. The health and safety manager or representatives of the selected 2,960 companies successfully finished in the face-to-face interview survey about company's general characteristics, health and safety management style, health and safety education hours conducted by the Korean Occupational Safety and Health Agency Results: The manufacturing companies in Seoul and Kyunggi areas, small size, and clothes and press industries were related to low health and safety management and education status. The companies which assigned at least one safety manager were 70.5% and which had a health and safety room within the company were only 9.3%. The companies which took the health and safety education for their regular blue-collar employees more than the legal education hours were under 56.1% and the percentage of the companies which took their health and safety education for newcomers less than the legal limits was lower than any other types of health and safety education in workplace. The significant strong workplace health and safety management variables in predicting employee health and safety education were psycho-social variables such as the company own health and safety regulation and the workplace health and safety management committee organization. rather than physical variables such as health manager employment, safety manager employment Conclusions: Systematic and legal approaches are effective to encourage workplace health and safety education, specifically, through sustaining health and safety managers and building the company-wide health and safety management system. Furthermore, theses approaches should primarily focus on the small companies of which sizes were under 50