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이준범,Lee Byoung-hee,박정준,Hong Jeong In,Lee Dae-Weon 한국응용곤충학회 2022 Journal of Asia-Pacific Entomology Vol.25 No.3
The tobacco whitefly, Bemisia tabaci (Hemiptera: Aleyrodidae), is a serious pest that transmits tomato yellow leaf curl virus (TYLCV) in tomato. The tobacco whitefly exhibits morphological similarity with the greenhouse whitefly, Trialeurodes vaporariorum (Hemiptera: Aleyrodidae) which also damages various plants in the green house. Therefore, it is very important to quickly and accurately diagnose whiteflies for applying pest manage ment strategies. In this study, we used a loop-mediated isothermal amplification (LAMP) assay to quickly and effectively detect B. tabaci. Primer sets were investigated for the specificity of B. tabaci by visible detection of the target DNA fragment. Two primer sets for pheromone biosynthesis activating neuropeptide (PBAN) gene were obtained from transcriptomic analysis of B. tabaci biotype Q. The PBAN-based LAMP primer set showed specific amplification of the target region. The optimal conditions for B. tabaci detection were 60 ◦ C for 60 min with four LAMP primers of PBAN. The minimum amount of genomic DNA required for visible detection was 100 ng. These results suggest that the PBAN-based LAMP assay can be applicable for field monitoring of B. tabaci.
백종현(J. H. Baek),김철만(C. M. Kim),김영표(Y. P. Kim),김우식(W. S. Kim),구재민(J. M. Koo),석창성(C. S. Seok) 한국가스학회 2009 한국가스학회 학술대회논문집 Vol.2009 No.10
덴트결함 배관의 하중지지능력은 굽힘응력 부가방식에 따라 변화하며 opening bending이 가해지는 경우가 closing bending에 비하여 더 높은 하중지지능력을 나타내며, 덴트결함 깊이와 내압 증가에 따라 굽힘응력 부가방식에 관계없이 TES 모멘트는 감소하며, 덴트결함 깊이 변화에 의한 TES 모멘트는 식 (1)을 이용하여 예측 할 수 있다.
J. H. Baek(백종현),N. A. B. Razali(누룰 아키라 빈티 라자리),M. S. Joun(전만수),T. J. Kim(김태종),S. J. Kim(김수진) Korean Society for Precision Engineering 2021 한국정밀공학회 학술발표대회 논문집 Vol.2021 No.11월
The accuracy of Linear Motion bearing (LM Bearing) of a machine tool is very important to evaluate the performance of the machine. Laser interferometer measurement system is one of the most reliable equipment to measure the angular error. This system is widely used to measure the position and angular errors by using an optical separator and reflector. Recently, the importance of remanufacturing for circular economy for carbon-neutral has been increasing. In machine tools, it is necessary to determine whether old parts can be reuse by measuring the precision of LM bearing for remanufacturing. Angular error of the LM bearing was caused by the straightness error of the rail. In this paper, the angular error of used LM bearing was compared to the new one to determine if it’s either residual or vice versa. Using Renshaw’s laser interferometer, we measured the pitch and yaw angle of the THK’s new LM bearing and the old LM roller bearing belongs to old planner miller that was disassembled for remanufacturing. By providing the result of both comparisons, we intended to help the machine tool industry in implementing circular economy.