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민원기,노현수,김창환,박찬홍,김동성,MIN, WON-GI,RHO, HYUN SOO,KIM, CHANG HWAN,PARK, CHAN HONG,KIM, DONGSUNG 한국해양학회 2019 바다 Vol.24 No.1
독도와 심흥택 해산의 정상부 및 사면에서 HD 급 비디오카메라, 2기의 LED 조명, 1개의 다목적 로봇팔, 8개의 추진기가 장착된 소형 ROV로 해저면 조사를 수행하였다. 조사에 사용된 장비는 스웨덴에서 제작된 500 m급 소형 무인잠수정 "V8 SII"과 지원모선인 "코쌀 5호"였으며, 수심 범위가 45~370 m인 조사해역의 4정점에서 총 6회 잠수를 수행하였고, 잠수시간은 운용조건에 따라 약 30~120분 소요되었다. 조사 결과, 독도 주변 해저 경사면과 해산 정상부 부근에는 다양한 크기의 암석 및 밀도 높은 부착생물인 심해성 말미잘(Actinostolidae sp.), 거미불가사리류(Ophiuridae sp.), 대게류의 서식이 확인되었다. 본 조사를 통해 얻어진 결과는 1) 주요 수산자원인 대게류의 서식 확인 및 심해생물상 자료, 2) 해저면의 퇴적상 및 지형 특성 확인, 3) 육상기원 어구 폐기물 확인 등이다. 본 탐사는 수산자원 및 생태학적으로 중요한 독도 해저면과 주변 해산의 수중환경의 첫 기록으로서, 동해의 해산 정상부의 심해 저서환경 및 생물의 직접관찰에 소형 ROV가 활용 가능함을 시사하였다. ROV surveys were conducted using 500 meter mini class ROV with HD video camera, 2 LED lights, a simple manipulator and 8 thrusters near the Dokdo and Simheungtaek seamount. Total six dives have been conducted using the ROV "V8 SII" from Sweden and ROV's support ship, "KOSAL V" at 4 stations between 45 and 370 meters with diving time ranged from 30 to 120 minutes. Dense communities of sea anemone (Actinostolidae sp.) and ophiuroids (Ophiuridae sp.) on the surface of rocky bottom and snow crab on the soft bottom with muddy-sand were observed at northwestern part of Simheungtaek seamount. We obtained the following results 1) habitats information for snow crab, one of the major fisheries resources, and deep-sea fauna, 2) observation on the specific topography and sediment conditions, 3) observation of the seabed surface covered with the discarded fishing gears. This study represents the first report of in situ visual observation of deep-sea organisms and their habitats near the Dokdo slopes and flat top of the Simheungtaek seamount in the East Sea. These results indicated that immediate oceanographic survey using the mini class ROV is available in the East Sea.
퇴적촉진 구조물 설치에 따른 중형저서동물 군집구조 및 변동
민원기,김동성,이재학,Min Won-Gi,Kim Dong-Sung,Lee Jae-Hac 한국수산과학회 2006 한국수산과학회지 Vol.39 No.2(특별호)
We investigated the spring and summer community structure of meiobenthos in a tidal-falt near Iwon, Korea, in 2002 and 2003. In total, 12 meiofaunal groups were found in the study area among which nematodes were the most dominant. Benthic foraminiferans, harpacticoid copepods, polychaetes, and crustacean nauplli were also dominant groups at all sites. The total density of meiobenthos at each station was be 246-2,177 ind./$10cm^2$. As the depth of sediment increased, the density of meiobenthos at each station gradually decreased. Changes in the vertical distribution of meiobenthos in the study area occurred mainly near the sediment surface (0-1 cm). Generally, between spring and summer the density of nematodes increased, and the density of other dominant meiofaunal groups (benthic harpacticoids, crustacean nauplii, benthic foraminiferans) decreased near the sediment trap the control site of sediment traps compared to that at the control site. The results of cluster and multidimensional scaling plots indicate that the meiofaunal community changed following construction of a low artificial wood groin structure.
Dexamethasone으로 면역기능(免疫機能) 저하(低下)된 토끼에 Infectious Bovine Rhinotracheitis Virus 감염시험(感染試驗)
민원기,전무형,박성국,안수환,차연호,Min, Won-gi,Jun, Moo-hyung,Park, Seong-kuk,An, Soo-hwan,Cha, Yeon-ho 대한수의학회 1988 大韓獸醫學會誌 Vol.28 No.1
To establish a laboratory animal model for study on development of diagnostic methods for infectious bovine rhinotracheitis virus(IBRV), experimental infection of the virus to rabbits immunosuppressed with dexamethasone(DX) were carried out. Results obtained throughout the experiments were as follows. When lymphocyte activity was measured by lymphocyte transformation to phytohaemagglutinin in parallel with total and differential leucocyte counting, both groups treated with 2.0mg DX once and 1.0mg DX daily showed marked immunosuppression between 5 to 72 hrs. after administration. The degree of suppression of lymphocyte activities was more remarkable in the latter group. IBRV PQ7 strain at $10^{7.5}\;TCID_{50}/0.2ml$ was inoculated into conjunctival sacs of rabbits immunosuppressed with DX and non-treated. During 3 weeks observation, the immunosuppressed groups revealed mild conjunctivitis, viremia and virus recovery by 33.3 to 100%, whereas the DX nontreated group showed viremia and virus recovery with no clinical conjunctivitis by one of three rabbits(33.3%). In conclusion, it was indicated that experimental infection of IBRV PQ7 strain to rabbit was limited in prerequisite to immunologic modification by administration of immunosuppressive drugs.
고압멸균 처리시간에 따른 닭 체내 조류인플루엔자와 뉴캐슬병 바이러스의 멸균효과
이진주 ( Jin Ju Lee ),김동혁 ( Dong Hyeok Kim ),임정주 ( Jeong Ju Lim ),김대근 ( Dae Geun Kim ),민원기 ( Won Gi Min ),이후장 ( Hu Jang Lee ),장홍희 ( Hong Hee Chang ),김석 ( Suk Kim ) 한국예방수의학회(구 한국수의공중보건학회) 2011 예방수의학회지 Vol.35 No.4
Avian influenza (AI) and Newcastle disease (ND) distress a variety of avian species, especially domestic poultry. Severe syndromes are caused by highly virulent specific virus strains termed highly pathogenic AI and velogenic ND viruses, which are potential agrobioterrorism agents. This outbreak emphasizes the need for continuing cooperation between public health and veterinary medical communities in controlling AI and ND when it has a zoonotic potential. Up to date, the stamping out and burying system were applied for controlling methods against these highly infectious diseases in the ordinary way, however these methods had many environmental problems, including leachat and effluvium. Thus, we assessed that sterilization effect of AI and ND virus dependent on several treatment conditions, such as autoclaving time and cutting types of chicken. As a result, we found that the cutting type of chicken meat revealed a reduced HA titer (20) against both of AI and ND virus after 10 min of autoclaving, while whole chicken showed same titer after 30 and 60 min. Therefore, we propose that the conditions of treatment on infected chicken should be developed for convenient, affordable, and effective prevention methods against for AI and ND.
민원기(Min, Won-Gi),김종욱(Kim, Jonguk),김웅서(Kim, Woong-Seo),김동성(Kim, Dong-Sung),이판묵(Lee, Pan-Mook),강정훈(Kang, Jung-Hoon) 한국산학기술학회 2016 한국산학기술학회논문지 Vol.17 No.4
국내 심해 저서환경의 접근 한계로 서식생물과 인근환경 연구를 위한 정밀채집이 불가능하였으나, 6,000 미터급 심해 무인잠수정 해미래의 개발로 가능성이 열렸다. 활용가능성 확인을 위해, 2015년 6월에 2주간 동해에서 연구선 온누리호 와 무인잠수정 해미래를 이용하여 울릉분지와 후포퇴 사면의 8개 정점에서 심해 종합해양연구를 국내최초로 수행하였다. 수심 범위가 194∼2,080m인 조사해역에서 총 10회 잠수를 수행하였고, 잠수시간은 운용조건에 따라 약 1∼6시간 소요되었 다. 조사 결과, 1) 주요 심해 해저면의 실제 영상, 2) 주요 수산자원인 홍게류의 서식밀도 및 미기록 생물종을 포함한 심해생 물상 자료, 3) 해저협곡의 경사면 등 특이 지형 확인, 4) 압력주상채니기를 이용한 퇴적물 주상시료 채집, 5) 육상폐기물 해양 투기현황을 확인 및 획득하였다. 본 탐사결과 심해 저서환경 및 생물의 직접관찰 및 채집이 가능함을 확인하였다. HEMIRE is a 6,000-meter-class remotely operated vehicle (ROV) that has been developed for observation and sampling of objects of interest on the deep seabed. We first carried out deep-seabed exploration around the slopes of the Hupo Bank and the Ulleung Basin in the East Sea in June 2015. Over two weeks, a total of 10 dives were made from a support ship, the R/V Onnuri, at eight stations with water depth ranging between 194 and 2,080 m. The dive times ranged from 1 to 6 hours, depending on the operating conditions. We obtained the following results: 1) video images of the deep seafloor; 2) red snow crab density data (a major fishery resource) and inventories of deep-sea fauna, including an unrecorded organism; 3) specific topographies such as canyons slopes; 4) an undisturbed sediment core obtained using a push corer; and 5) observations of the seabed surface covered with discarded anthropogenic waste material.