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인천연안 Vibrio parahaemolyticus의 분포 및 유산과 과산화수소 처리에 의한 항균효과
장재선,조우균,이혜정,이제만,김혜영,김용희,Jang, Jae-Seon,Cho, Woo-Kyoun,Lee, Hye-Jeong,Lee, Jea-Mann,Kim, Hye-Young,Kim, Yong-Hee 대한환경위생공학회 2006 대한환경위생공학회지 Vol.21 No.4
This study was carried out to investigate the distribution of Vibrio parahaemolyticus in the Incheon adjacent sea, and antimicrobial effect on growth of Vibrio parahaemolyticus in lactic acid and hydrogen peroxide and combination of lactic acid and hydrogen peroxide. The detected strains were compared geographical, months and sample types. The distribution of Vibrio parahaemolyticus was high at Ganghwa county with 66.1%(336 samples), on 7-9 months with 72.4%(386 samples) and from tireland with 75.0%(90 samples), respectively. The minimun inhibitory concentration (MIC) of lactic acid in Vibrio parahaemolyticus were 1250 ppm at pH 6.5 and 7.0, 625 ppm at pH 6.0. respectively. The minimun inhibitory concentration (MIC) of hydrogen peroxide in Vibrio parahaemolyticus were 25 ppm at pH 6.5 and 7.0, 12.5 ppm at pH 6.0, respectively. MICs of combined treatment of lactic acid and hydrogen peroxide in Vibrio parahaemolyticus were 625 ppm of lactic acid with 12.5 ppm of hydrogen peroxide. The correlations between MICs of lactic acid and hydrogen peroxide in Vibrio parahaemolyticus were obtained through the coefficient of determination($R^2$). $R^2$ value were 1.0000. The antimicrobial effect of lactic acid and hydrogen peroxide in Vibrio parahaemolyticus could be confirmed from the result of this experiment.
유기산이 Escherichia coli O157:H7, Salmonella 및 Listeria monocytogenes의 증식에 미치는 영향
장재선,이혜정,오보영,이제만,고종명,김용희,Jang, Jae-Seon,Lee, Hye-Jeong,Oh, Bo-Young,Lee, Jea-Mann,Go, Jong-Myeong,Kim, Yong-Hee 한국환경보건학회 2007 한국환경보건학회지 Vol.33 No.5
The inhibitory effect of the food processing agent on growth of Escherichia coli O157:H7, Salmonella Enteritidis, and Listeria monocytogenes was performed with organic acid, and combination of citric acid, acetic acid, propionic acid and vanillic acid. The minimun inhibitory concentration(MIC) of propionic acid was 5,000 ppm in E. coli O157:H7, 2,500 ppm in Salmonella Enteritidis and Listeria monocytogenes. MIC of citric acid was 10,000 ppm in E. coli O157:H7 and Salmonella Enteritidis, 2,500 ppm in Listeria monocytogenes. MIC of acetic acid was 2,500ppm, while in vanillic acid was 5,000 ppm in Escherichia coli O157:H7, Salmonella Enteritidis, and Listeria monocytogenes. MIC of combined organc acid in E. coli O157:H7 were 2,500ppm in PC, 1,250 ppm in PA, PV, CA, CV and AV. MIC of combined organc acid in Salmonella Enteritidis were 2,500 ppm in PC, PA, PV, CA, and CV, 1,250 ppm in AV. MIC of combined organc acid in Listeria monocytogenes were 1,250 ppm in all treatment group. MIC of combined treatment of three organc acid in E. coli O157:H7, S. Enteritidis and L. monocytogenes were 1,250 ppm in PCA, PCV, PAV and CAV. The inhibitory effect of organc acid in E. coli O157:H7, S. Enteritidis and L. monocytogenes could be confirmed from the result of this experiment. Therefore, it was expected that the food process would increase or maintain by using organic acid.
Aspergillus oryzae로부터 분리한 chitosan복합체에 의한 카드뮴 제거 효율에 관한 연구
장재선(Jae-Seon Jang),이제만(Jea-Mann Lee),김용희(Yong-Hee Kim) 대한환경위생공학회 2004 대한환경위생공학회지 Vol.19 No.1
The removal efficiency of cadmium by chitosan complex isolated from Aspergillus oryzae was investigated through laboratory experiments. The results of the study are as follows. The adsorption kinetics of cadmium was reached the adsorption equilibrium in approximately 30 minutes and the removal efficiency was showed 95.8%. The effect of temperature on cadmium adsorption by chitosan complex shows that as the temperature increased, the amount of cadmium adsorption per unit weight of chitosan complex increased. The correlation between amount of cadmium adsorption per unit weight of chitosan complex and temperature was obtained through the coefficient of detennination(R²). R² values was 0.854(p<0.05L A linearized Freundlich equation was used to fit the acquired experimental data. As a result, Freundlich constant, the adsorption intensity)1/n) was 0.550, and the measure of adsorption(k) was 2.18l. So. it was concluded that adsorption of cadmium by chitosan complex is effective.
장재선(Jae-Seon Jang),이미연(Mi-Yeon Lee),이제만(Jea-Mann Lee),김용희(Yong-Hee Kim) 대한환경위생공학회 2004 대한환경위생공학회지 Vol.19 No.4
The inhibitory effect of the food processing agent on growth of Escherichia coli O157:H7, Salmonella Enteritidis, and Listeria monocytogenes was performed with hydrogen peroxide and lactic acid, and combination of hydrogen peroxide and lactic acid. The minimun inhibitory concentration (MIC) of hydrogen peroxide in E. coli O157:H7 was 100 ppm at pH 5.0, 6.0, 6.5 and 7.0, while in Listeria monocytogenes 25 ppm at pH 5.5, 6.0 and 50 ppm at pH 6.5, 75 ppm at pH 7.0. MIC of lactic acid in E. coli O157:H7 was 2500 ppm at pH 5.0, 6.0, 6.5 and 7.0. MIC of lactic acid in S. Enteritidis was 1250 ppm at pH 5.0, 2500 ppm at pH 5.5, 6.0, 6.5 and 7.0, while in L. monocytogenes 625 ppm at pH 5.5 and 125 ppm at pH 6.0, 6.5 and 7.0. MIC of combined hydrogen peroxide and lactic acid in E. coli O157:H7, S. Enteritidis, and L. monocytogenes was 75 ppm of hydrogen peroxide with 2500 ppm of lactic acid at pH 6.5. The correlations between MICs of hydrogen peroxide and lactic acid in E. coli O157:H7, S. Enteritidis and L. monocytogene were obtained through the coefficient of determination(R²). R² value were 0.9984, 0.9935 and 0.9283, respectively. The inhibitory effect of hydrogen peroxide and lactic acid in E. coli O157:H7, S. Enteritidis and L. monocytogenes could be confirmed from the result of this experiment. Therefore, it was expected that the food process would increase or maintain by using lactic acid together with hydrogen peroxide.
Hye Jin Choi(최혜진),Bo Young Oh(오보영),Mi Yeon Lee(이미연),Yeon Ja Koh(고연자),Young Woo Gong(공용우),Myung Je Hur(허명제),Jea Mann Lee(이제만),Young Hee Kim(김용희),Hye Sook Jeong(정혜숙),Doo Sung Cheon(천두성) 한국생명과학회 2012 생명과학회지 Vol.22 No.5
인천지역 병·의원에 내원한 급성위장염환자의 대변 검체 총 11,607건을 효소 면역법(ELISA)을 이용하여 group A rotavirus의 계절별 발생 양상을 조사한 결과 2005년부터 2010년간 인천지역에서는 1~2월이 가장 많이 발생하였으나, 기간별로 차이가 존재했다. 또, group A rotavirus 양성 검체 160건에 유전자 분석 결과 VP4는 P8형, VP7는 G1형, G와 P 조합형으로는 G1P8이 가장 많았다. 그러나 이전의 연구와 비교했을 때 연구 지역과 기간에 따라 혈청형과 유전형의 변화가 빈번하였으므로 효율적인 방역을 위해 지속적인 모니터링이 필요하다고 사려된다. 또 이번 연구는 현재 유통 중인 rotavirus 백신의 효율적인 사용의 기초 자료가 될 것이다. Rotavirus is the main cause of severe diarrhea in infants and young children of the world. However, the frequency of genetic alterations makes it hard to control the prophylaxis. Therefore, continuous monitoring of the rotavirus’s genetic change is inevitable to prevent disease prevalence and is useful in inventing an efficient vaccine. From January 2005 to December 2010, we investigated 11,607 stool samples of acute gastroenteritis patients in the Incheon metropolitan area. About 13.18% (1,530 stool samples) of all samples had a positive reaction against rotavirus using an antigen capture enzyme- linked immunosorbent assay (ELISA). Then, the 160 stool samples were searched for subtypes of group A rotavirus by using a reverse transcription polymerase chain reaction (RT-PCR) and a nested multiplex RCR. In P sub-typing, P8 (56.3%) was an extremely prevalent genotype, followed by P6 (21.3%), and P1A (10.0%). G1 (39.4%) was most widespread in the G subtype, followed by G4 (25.0%) and G3 (18.8%). G1P8 (35.5%) was the most common G and P subtype combination, followed by G4P6 (19.3%) and G3P8 (13.1%). These results might be useful data for understanding the epidemiological status of group A-rotavirus dispersion in the Incheon metropolitan area.