http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
섬기린초(Sedum takesimense)에서 분리된 화합물들의 RAW 264.7 Cell에 대한 항염증 효과와 여드름 원인균에 대한 항균 효과
정은탁 ( Eun-tak Jeong ),박슬기 ( Seul-ki Park ),조경진 ( Kyung-jin Cho ),정금재 ( Geum-jae Jeong ),윤태미 ( Tae-mi Yoon ),최태호 ( Tae Ho Choi ),김영목 ( Young-mog Kim ) 한국수산과학회 2021 한국수산과학회지 Vol.54 No.4
This study investigated anti-inflammatory and antibacterial activities of Sedum takesimense ethanolic extract, and 3 isolated compounds. To confirm anti-inflammatory and anti-acne activities, a nitric oxide (NO) inhibition assay, pro-inflammatory factor (TNF-α, IL-1β, and IL-8) inhibition assays, and minimum inhibitory concentration (MIC) tests were performed. The 3 isolated compounds were identified as 4,6-di-O-galloylarbutin (OGA), 2,4,6-tri-O-gal-loyl-glucose (OGG), and 1,2,4,6-tetra-O-galloyl-β-glucose (TOGG). The ethanolic extract and isolated compounds (OGA, OGG, TOGG) effectively inhibited production of NO and pro-inflammatory cytokines (TNF-α, IL-1β, and IL-8). Furthermore, OGG and TOGG exhibited MIC values toward Cutibacterium acnes of 12.5 μg/mL and 3.2 μg/ mL, respectively. These results suggest that S. takesimense extract exerts an anti-inflammatory effect on LPS-induced RAW264.7 cells, and an antibacterial efficacy against C. acnes.
생굴( Crassostrea gigas)의 저장성 및 관능성에 대한 천연 첨가물의 효과
정은탁 ( Eun Tak Jeong ),한해나 ( Hae Na Han ),김윤혜 ( Yun Hye Kim ),이은혜 ( Eun Hye Lee ),김덕훈 ( Deok Hoon Kim ),김지훈 ( Ji Hoon Kim ),염승목 ( Seung Mok Yeom ),김영목 ( Young Mog Kim ) 한국수산과학회 2015 한국수산과학회지 Vol.48 No.2
We explored the efficiency of natural antibacterial agents used to enhance the self-life and sensory properties of shucked and packed Pacific oyster Crassostrea gigas, which are in high demanded. First, we screened natural resources exhibiting antibacterial activity against food spoilage and pathogenic bacteria. Of theses, ignited oyster shell powder (IOS) and the natural food preservative, lactic acid bacteria fermented powder (LBF), were selected for further study considering the efficacy, mass production, and cost. The addition of 0.1% IOS (W/V) and 0.5% LBF (W/V) to shucked and packed oyster optimally extended the shelf-life without affecting the sensory evaluation. The results obtained in this study will provide a clue to enhance self-life in raw oyster products.
장동석(Dong Suck Chang),정은탁(Eun Tak Jeong),유홍식(Hong Sik Yu),이은우(Eun Woo Lee),임성미(Sung Mee Lim) 한국수산과학회 1998 한국수산과학회지 Vol.31 No.1
A bacteriological study of sea water in Deukryang Bay was conducted to evaluate sanitary conditions of the bay and compliance of waters with the recommended bacteriological criteria for the designated area of shellfish cultivation. Sea water samples were collected at the established sampling stations(Fig. 1) from May 1995 to November 1996. During the study period, coliform group, fecal coliform, classification of coliform group with IMViC reactions and pathogenic vibrios were analyzed. Coliform group and fecal coliform MPN`s were ranged from <3.0-4,600/100㎖ and <30-1,100/100㎖, respectively. The bacteriological criteria of sea water in shellfish growing area should be less than 70 per 100㎖ of sea water for median value of coliform MPN, and below 10% of the samples which contain over than 230 for coliform MPN or over than 43 for fecal coliform MPN. Most of the waters from 26 sampling stations were complied water coliform criteria recommended for designated shellfish growing area. Then, the ratios of the samples with more than 230/100㎖ of coliform group MPN and more than 43/100㎖ of fecal coliform MPN were 7.4% and 8.5%, respectively. The bacterial density of the sea water was deeply affected by rainfall amount. For example, coliform bacterial counts of sea water after 48 hours from 93㎜ rainfall were 6-7 times higher than those of without rainfall. During the study period, infectious bacteria such as Vibrio cholerae, Salmonella sp. and Shigella sp. were not detected from the samples, but detection ratios of Vibrio parahaemolyticus and Vibrio vulnificus were 15-20% in summer months.
이원동(Won Dong Lee),장동석(Dong Suck Chang),고병호(Byeong Ho Koh),이명숙(Myung Suk Lee),정은탁(Eun Tak Jeong) 한국수산과학회 1997 한국수산과학회지 Vol.30 No.2
The study was attempted to detemine the ratio of stomach and intestine to viscera gathered on catching vessels, the critical level of VBN content as a freshness quality of viscera of Alaska pollack for raw materials of Changran-jeotgal. It also examined the changes of VBN values, pH and viable cell counts during the fermentation. Then sensory evaluation of the fermented products, Changran-jeotgal, was done according to the freshness of raw materials used. The ratio of stomach and intestine to the gathered viscera on the vessel was about 72%, while that of round state of Alaska pollack was about 18%. There was no significant relationship in VBN content between fish muscle and viscera. It suggests that VBN content is not a reasonable freshness criteria in viscera but in fish muscle. However, if we use the VBN content as a freshness criteria of viscera for raw materials of Changran-jeotgal, less than 70 ㎎% of VBN value could be recommended. According to the experimental results, the product yields and sensory evaluation scores were no good not only for economical evaluation but also for consumption.
병원성 비브리오균과 동물성 플랑크톤과의 관계에 관한 연구
장동석(Dong Suck CHANG),김창훈(Chang Hoong KIM),유홍식(Hong Sik YU),김신희(Shin Hee KIM),정은탁(Eun Tak JEONG),신일식(Il Shik SHIN) 한국수산과학회 1996 한국수산과학회지 Vol.29 No.5
An ecological study on pathogenic vibrios was done in the aquatic environments of southern coast of Korea during summer in 1995, to investigate the distribution and relationship between pathogenic vibrio and zooplankton. Furthermore, special emphasis was given to study on the effects of zooplankton existence on the wintering of Vibrio cholerae in the aquatic region in Korea. During the study period, pathogenic vibrios were isolated from the samples such as V. parahaemolyticus, V. vulnificus, V. mimicus, and V. cholerae non O1, but V. cholerae O1 was not detected in any sample submitted in this study. Adsorption ratio of V. parahaemolyticus onto zooplankton was higher than that of E. coli. The efficiency of adsorption was found to be on the concentration of NaCl and other ions found in sea water. For example, adsorption ratio of V parahaemolyticus were 75% at 5 ‰ of NaCl solution and 55% at same salinity of diluted sea water, but those were decreased as 20% and 7% at 15 ‰ salinity of NaCl solution and diluted sea water, respectively. In addition, survival period of pathogenic vibrio was extended in the presence of live copepods at 25℃, but zooplankton existence has no significant effect on the survival rate at 5℃ in closed microcosm and also microalgae and dead copepods do not affect on the survival of V. parahaemolyticus. According to these experimental results, zooplankton has positive effects on the growth and survival rate of pathogenic vibrios in sea water during the summer season, but copepods have no significant effects on the growth and survival rate of them in winter season in Korea. Finally, authors suggest that V. cholerae is not able to over winter with zooplankton in adjacent sea water in Korea.
송원 ( Won Song ),임근식 ( Keun Sick Lim ),유대웅 ( Dae Ung Yu ),박미은 ( Mi Eun Park ),정은탁 ( Eun Tak Jeong ),김동명 ( Dong Myung Kim ),정용현 ( Yong Hyun Chung ),김영목 ( Young Mog Kim ) 한국수산과학회(구 한국수산학회) 2011 한국수산과학회지 Vol.44 No.4
Nonylphenol (NP), which is well known as an endocrine disrupter, has been detected widely in untreated sewage or waste water streams. Given the necessity of discovering an eco-friendly method of degrading this toxic organic compound, this study was conducted to isolate NP-degrading microorganisms from the aqueous environment. NP-degrading microbes were isolated through NP-containing enrichment culture. Finally, a microbial consortium, SW-3, capable of degrading NP with high efficiency, was selected from the mixture sample. The microbial consortium SW-3 was able to degrade over 99% of 100 ppm NP in the culture medium for 40 days at 25°C. The microbial consortium SW-3 seemed to utilize NP as a carbon source, since NP was the sole carbon source in the culture medium. In order to isolate the NP-degrading bacterium, we further conducted single colony isolation using the microbial consortium SW-3. Four strains isolated from SW-3 exhibited lower NP-degradation efficiency than that of SW-3, suggesting that NP was degraded by the co-metabolism of the microbial consortium. We suggest that the microbial consortium obtained in this study would be useful in developing an eco-friendly bioremediation technology for NP degradation.