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강원도 양식 연어과 어류에서 분리된 에로모나스 종의 유전학적 동정
임종원,구본형,김광일,정현도,홍수희,Lim, Jongwon,Koo, Bonhyeong,Kim, Kwang Il,Jeong, Hyun Do,Hong, Suhee 한국어병학회 2017 한국어병학회지 Vol.30 No.2
현재 양식장에서는 Aeromonad를 비롯한 다양한 병원균에 의한 전염병으로 인해 많은 경제적 손실을 겪고 있다. 연어과 어류뿐만 아니라 담수 및 해수어류에도 치명적인 감염을 야기하는 Aeromonas 종은 적어도 26종 이상이 보고되어왔으며, 전염병을 유발하는 유비쿼터스 세균이다. Aeromonas 종을 확인하기 위해 16S rDNA 및 하우스 키핑 유전자의 핵산 서열을 기반으로 한 분자생물학적 기술이 사용될 수 있다. 본 연구에서 Aeromonas 종은 강원도 16개 양식장의 연어과 어류로부터 분리되었으며 Aeromonad의 16S rDNA와 하우스 키핑 유전자의 서열, 즉 RNA polymerase sigma factor ${\sigma}^{70}$ (rpoD) 또는 DNA gyrase subunit B (gyrB)를 기반으로 계통 발생 학적으로 동정했다. 그 결과 대서양 연어 (Salmo salar), 은연어 (Oncorhynchus keta), 산천어 (Oncorhynchus masou masou), 무지개송어 (Oncorhynchus mykiss)에서 96 개의 균주가 수집되었으며, 36개의 균주가 16S rDNA 분석에 의해 Aeromonas 속으로 확인되었다. 확인된 Aeromonas 속 균주는 rpoD 또는 gyrB 유전자 서열을 기반으로 추가 분석되어 Aeromonas salmonicida (24 균주), A. sobria (10 균주), A. media (1 균주) 및 A. popoffii (1 균주)로 검출되었으며, 이 것은 Aeromonas salmonicida가 강원도의 연어과 어류에서 주요 감염균임을 나타낸다. 또 하우스 키핑 유전자의 서열에 기초한 Aeromonas 종의 계통발생학적 동정은 16S rDNA 서열보다 더 정확하다는 것이 또한 증명되었다. At the present, fish farms are suffering a lot of economic losses due to infectious diseases caused by various pathogens including aeromonad. Aeromonad is ubiquitous bacteria that causes infectious diseases. At least 26 species in the genus Aeromonas have been reported to cause fatal infections not only in salmonid fishes, but also in other freshwater and seawater fishes. Molecular techniques based on nucleic acid sequences of 16S rDNA and housekeeping genes can be used to identify the Aeromonas species. In this study, The genus Aeromonas was isolated from salmonid fishes of sixteen fish farms in Gangwon-Do, Korea and phylogenetically identified based on the sequences of 16S rDNA and housekeeping genes for Aeromonad, i.e. RNA polymerase sigma factor ${\sigma}^{70}$ (rpoD) or DNA gyrase subunit B (gyrB). Consequently, 96 strains were collected from Atlantic salmon (Salmo salar), coho salmon (Oncorhynchus kisutch), masou salmon (Oncorhynchus masou) and rainbow trout (Oncorhynchus mykiss), and 36 isolates were identified as the genus Aeromonas by 16S rDNA analysis. Thirty six Aeromonad isolates were further analysed based on rpoD or gyrB gene sequences and found Aeromonas salmonicida (24 isolates), A. sobria (10 isolates), A. media (1 isolates) and A. popoffii (1 isolates), indicating that A. salmonicida is a main infectious bacteria in Salmonid fishes in Gangwon-Do. It was also proved that the phylogenetic identification of Aeromonas species based on the sequences of housekeeping gene is more precise than the 16S rDNA sequence.
강원도의 연어과 어류에서 분리된 IHNV 분리주의 계통분류 및 병원성 분석
임종원 ( Jongwon Lim ),고은호 ( Eunho Go ),홍수희 ( Suhee Hong ) 한국어병학회 2021 한국어병학회지 Vol.34 No.2
This study investigated the phylogenetic classification and pathogenicity of 6 infectious hematopoietic necrosis virus (IHNV) strains isolated from salmonid fish in Gangwon-do, Korea. Based on the nucleotide sequence of mid-G region, all six strains belong to J genotype, of which 5 are J-Nagano type and 1 J-Shizuoka type. In a challenge test, 5 isolates of J-Nagano type IHNV showed a various mortalities as 2 isolates induced a high mortality of 100% and the other 3 isolates induced mortalities of 50, 30, and 20% after intraperitoneal injection in rainbow trout (Oncorhynchus mykiss). Meanwhile no mortality was occurred by 1 isolate of J-Shizuoka type virus. Thus, it seems that there might be no relation between genotype and pathogenicity within IHNV J genotypes. This is contrary to previous studies where reported a higher pathogenicity of J-Shizuoka type virus than J-Nagano type virus in rainbow trout. Further examination will be required to clarify this since only one J-Shizuoka type virus was analyzed in this study.
해수에 순치된 첨연어(Oncorhynchus keta)에서 분리된 정형 에로모나스 살모니시다(Aeromonas salmonicida)에 대한 특성 분석
임종원 ( Jongwon Lim ),고성재 ( Sungjae Ko ),박영준 ( Youngjun Park ),안도일 ( Do-il Ahn ),홍수희 ( Suhee Hong ) 한국어병학회 2023 한국어병학회지 Vol.36 No.2
Chum salmon (Oncorhynchus keta) is a species which returns to Korea for spawning and was produced as seed production at the Fisheries Resources Agency located in Uljin-gun, Gyeongsangbuk-do to preserve the species. However, farmed chum salmon showed symptoms of bacterial infection. Therefore, in this study, bacteria were isolated to identify the causative agent from chum salmon in October 2021. The isolated bacteria were identified based on the sequences of 16S rDNA, rpoD (RNA polymerase sigma factor σ70), and vapA (A-layer) genes. Also, salinity-growth curve, biochemical characterization, antibiotic susceptibility test, and pathogenicity analysis were performed in four strains. As a result, four isolated strains were identified as Aeromonas salmonicida subsp. salmonicida. Additionally, the bacterial strains showed a decrease in growth as the salt concentration increased in the medium. All of the isolated strains exhibited γ-hemolysis, and the same biochemical properties. In the antimicrobial susceptibility test, all strains showed an inhibition zone of 40 to 44 mm for oxolinic acid, flumequine, and florfenicol. Pathogenic factors were assessed by RT-PCR at the mRNA level, and found that the four strains expresses the outer membrane ring of T3SS (ascV), inner membrane ring of T3SS (ascC), vapA, enterotoxin (act), and lipase (lip) genes which are well known to significantly contribute to the pathogenicity of A. salmonicida. The results of this study can be used as basic data to prevent A. salmonicida subsp. salmonicida occurring in sea-chum salmon in the future.
이정행,전종현,강정완,임종원,이병석,주정민,김선우,Jeonghang Lee,Jong Hyun Jeon,Jeongwan Kang,Jongwon Lim,ByungSeok Lee,Jung-Min Joo,Sunwoo Kim 항법시스템학회 2024 Journal of Positioning, Navigation, and Timing Vol.13 No.2
In this paper, we survey recent trends of International Global Navigation Satellite System (GNSS) organizations such as the International Committee on GNSS (ICG), International Civil Aviation Organization (ICAO), International Maritime Organization (IMO), and International Telecommunication Union (ITU), and investigate their impact on the maritime and aviation sectors. Each international organization promotes international cooperation, improvement of service quality, assurance of security, compliance with international regulations, and technological innovation and development. ICG develops a variety of satellite navigation enhancement systems. ICAO establishes international aviation regulations and standards to enhance aviation safety and security. IMO establishes international shipping conventions and rules to protect and regulate the shipping environment. Lastly, ITU establishes international communication regulations and standards. Investigation of such international organizations plays an important role in increasing the efficiency and reliability of GNSS systems. Each international organization promotes international cooperation, improvement of service quality, assurance of security, compliance with international regulations, and technological innovation and development. In the future, interoperability and compatibility with new satellite navigation systems and other GNSS and satellite navigation enhancement systems must be secured, so and thus investigation of international organizations must be conducted first.
수소연료전지 버스의 비선형 모델 예측 제어를 활용한 실시간 동력 분배 제어 알고리즘
이승연(Seungyeon Lee),이주인(Jooin Lee),임종원(Jongwon Lim),이형철(Hyeongcheol Lee) 한국자동차공학회 2023 한국자동차공학회 학술대회 및 전시회 Vol.2023 No.11
In this paper, power distribution control algorithm for fuel cell electric bus was developed. Power distribution control algorithm is developed by using Gradient based Model Predictive Control(GRAMPC). Algorithm considered vehicle’s system characteristics like fuel cell, battery, motor and vehicle dynamics. Cost function is developed with considering battery’s State-of-charge and consumption ratio of fuel cell. GRAMPC can execute nonlinear model predictive control algorithm with real-time environment. Driving scenario is developed including real world traffic condition by using SUMO and Autonomie. Algorithms is validated in real-time simulation environment with dSPACE RCP-HIL simulator.
노선 및 시간대를 고려한 ECMS 기반의 연료전지 하이브리드 버스의 최적 동력 분배에 관한 연구
김재영(Jaeyoung Kim),이주인(Jooin Lee),임종원(Jongwon Lim),정욱용(Ukyong Jeong),이형철(Hyeongcheol Lee) 한국자동차공학회 2023 한국자동차공학회 학술대회 및 전시회 Vol.2023 No.11
본 연구에서는 연료전지 하이브리드 버스의 노선 및 시간대를 고려한 동력 분배에 대한 연구를 수행하였다. 기존 ECMS(Equivalent Consumption Minimization Strategy) 기반의 최적 제어 전략의 경우, 차량의 주행 특성이 달라지면 최적 등가인자가 달라지는 문제가 있다. 하지만 버스의 경우 노선 및 시간대에 따라 일정한 주행 특성을 가지기 때문에 이를 고려한 최적 등가인자 맵을 적용하여 다양한 주행 특성에서 최적 동력 분배가 가능하도록 연구를 수행하였다. 이를 위해 연료전지 하이브리드 버스를 모델링하고 실제 버스의 주행 정보 데이터를 활용하여 노선 및 시간대별 최적 등가인자를 도출하였으며, 시뮬레이션을 통해 ECMS 기반의 최적제어 전략을 적용한 연료전지 하이브리드 버스가 기존의 규칙 기반 제어 전략과 비교하여 연료 소비량을 감소시키는 것을 확인하였다. 본 연구는 연료전지 하이브리드 버스의 운영 비용을 절감하고 미래 도시 교통 시스템의 지속 가능성을 높이는 데 기여할 수 있는 중요한 연구 결과를 제시한다.