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유카추출물과 didecyldimethylammonium chloride를 주성분으로 하는 살균소독제 아쿠아 팜세이프의 어류병원체에 대한 살균 효과
서정수 ( Jung Soo Seo ),전은지 ( Eun Ji Jeon ),황지연 ( Jee Youn Hwang ),정승희 ( Sung Hee Jung ),박명애 ( Myoung Ae Park ),이성민 ( Sung Min Lee ),이은혜 ( Eun Hye Lee ) 한국어병학회 2013 한국어병학회지 Vol.26 No.2
In this study, the disinfectant efficacy of Aqua farmsafe®, composed of didecyldimethylammonium chloride (DDAC) and yucca extract was evaluated against Salmonella typhimurium and fish pathogens. Determination of the anti-microbial or anti-viral efficacy of the disinfectant was based on Animal, Plant and Fisheries Quarantine and Inspection Agency Regulation No. 2011-26, Korea. Anti-bacterial efficacy test by broth dilution method was used to determine the lowest effective dilution of the disinfectant following exposure to test bacteria for 30 min at 4℃. Aqua farmsafe and test bacteria or virus were diluted with distilled water (DW), standard hard water (SW) or organic matter dilution (OM) according to treatment condition. Under the our results, disinfectant efficacy of Aqua farmsafe® possesses 30~40 fold against fish pathogens including bacteria and virus compared to that on animal pathogenic bacteria, S. typhimurim. As the efficacy of Aqua farmsafe® against fish pathogen was investigated in vitro, a controlled field trial is required to determine whether the use of Aqua framsafe® will be able to reduce fish diseases.
서정수(Seo, Jung-Soo) 계명대학교 산학연구소 2010 계명대학교 산업경영연구소 단행본 Vol.- No.-
Globalization has been accompanied by a rapid expansion of trade in goods and services and foreign direct investment(FDI). The rapid expansion of trade in intermediate goods and services over last 10 years has highlighted firms are different in productivity and in other aspects such as size. Multinational firm"s sourcing strategy has become complex due to the fragmentation of production processes, and firms face the choice of production location and organizational forms. Mushrooming evidence that firms are heterogeneous and also that they fragment production processes spurred the development of "new new" trade theories based on firm heterogeneity and incomplete contract.
서정수 ( Jung Soo Seo ),전은지 ( Eun Ji Jun ),정승희 ( Sung Hee Jung ),김명석 ( Myoung Sug Kim ),박명애 ( Myoung Ae Park ),이철호 ( Chul Ho Lee ),한명철 ( Myoung Chul Han ),김진우 ( Jin Woo Kim ),지보영 ( Bo Young Jee ) 한국어병학회 2010 한국어병학회지 Vol.23 No.1
2006년부터 2008년까지 국내로 회귀하는 연어(O. keta)의 소상위치, 암수 및 근육 부위별 아니사키스형 유충의 감염상을 조사하였다. 3년 동안 강에서 채집된 연어 17마리와 바다에서 채집된 13마리의 아니사키스형 유충의 감염율을 조사한 결과, 강에서 채집된 연어의 수컷 및 암컷은 마리 당 아니사키스형 유충이 각각 평균 98±27 및 103±27 마리씩 감염되어져 있었다. 바다에서 채집된 연어의 수컷 및 암컷은 마리 당 아니사키스형 유충이 각각 평균 63±18 및 108±17마리씩 감염되어져 있었고, 암수 및 소상위치간의 아니사키스형 유충의 감염 마리수에서 통계학적 차이는 없는 것으로 나타났다. 아니사키스형 유충의 근육 부위별로 조사하면 복강내측 근육 (abdominal muscle)에 85%가 기생하며, 내장기관에는 거의 유충이 발견되지 않았다. 동정된 아니사키스형 유충은 Anisakis type이 74%며, 나머지는 Contracacecum type로 분류되었다. 연어 근육내에서 아니사키스형 유충의 저온처리에 따른 생존율을 조사하였을시에 최소 6시간 이상의 냉동보존 (-20℃)만이 아니사키스형 유충이 죽는다는 사실을 알 수 있었다. The infestation status of anisakid type larvae was investigated in migrating chum salmon (Oncorhynchus keta), with different condition (captured area, sex, body portion) during 2006~2008. The mean infection number of anisakid larvae per individual female and male fish captured from Namdae river was 98±27, 103±27, respectively. The mean infection number of anisakid larvae per individual female and male fish captured from the coastal area of Yangyang was 63±18 and 108±17, respectively. The anisakid larvae were mainly found in abdominal muscles (85%) but only a little in the visceral portion. Two types of anisakid larvae (A. simplex, Contracaecum type) were identified but other anisakid larvae were not detected. To investigate the effect of storing temperature on the viability of anisakid larvae, the section of abdominal muscle were stored at different temperature (room temperature, 4℃, -20℃, -80℃). As a result, it was necessary to store at -20℃ for more than 6 hrs to kill the larvae. The present results revealed that chum salmon caught in Korea are heavily infected with anisakid larvae, mainly in the abdominal muscle, and A. simplex was dominantly found in this study.
배전자동화시스템에서 전류방향성을 이용한 단말장치의 고장표시 오류 개선 방법
서정수(Jung-Soo Seo),김형승(Hyung-Seung Kim),임성일(Seong-Il Lim),최면송(Myeon-Song Choi),이승재(Seung-Jae Lee) 대한전기학회 2014 전기학회논문지 Vol.63 No.10
In this paper, an improved method of fault indicator generation algorithm in FRTUs is proposed for the present Distribution Automation System. In order to find fault area, correct FI information should be generated. But when a single line-to-ground fault occurs, FI information is generated in downside of the fault in some circumstance because existing FI algorithm considers only magnitude. It is found that the upside fault current direction if different from the downside fault current direction. Therefore, in order to prevent to generate the wrong fault indication information for FRTU at the downside of the fault, an improved fault indication generation method is developed. Not only the basic conditions are taken into account, but also the directions from the angle difference between zero and positive sequence currents are considered to generated the fault indication information. In case study, the proposed method has been testified and shown the reasonability in generating correct the fault indication information. for many kinds of faults according to conditions.