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이온마이그레이션에 대한 플라스틱과 금속첨가제의 영향 연구
전상수,김지정,이호승,Jeon, Sang Soo,Kim, Ji Jung,Lee, Ho Seung 한국자동차안전학회 2021 자동차안전학회지 Vol.13 No.2
Electrical failures and reliability problems of electronic components by ionic migration between adjacent device terminals have become an issue in automotive electronics. Especially unlike galvanic corrosion, ionic migration is occurred at high temperature and high humidity under applied electric field condition. Until now, although extensive studies of the ionic migrations dealing with PCBs, electrodes, and solders were reported, there is no study on the effect of insulation polymers and metallic fillers for ionic migration. In this research, therefore, ionic migration induced by the types and contents of polymers and metallic fillers, and variety conditions of temperature, humidity, and applied voltage was studied in detail. Ester and amide types of liquid crystal polymer (LCP) and poly (phthalamide) (PPA) were used as base polymers, respectively and compounded with the metallic fillers of Copper iodide (CuI), Zinc stearate (Zn-st), or Calcium stearate (Ca-st) in various compositions. The compounding polymers were fabricated in IPC-B-24 of SIR test coupon according to ISO 9455-17 with Cu electrodes for ionic migration test. While there is no change in LCP-based samples, ionic migration in PPA compounding sample with a high water absorption property was accelerated in the presence of 0.25 wt% or above of CuI at the environmental conditions of 85℃, 85% RH and 48V. The dendritic short-circuit growth of Cu caused by ionic migration between the electrodes on the surface of compounded polymers was systematically observed and analyzed by using optical microscopy and SEM (EDX).
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등온증폭법을 이용한 돼지인플루엔자바이러스 신속 진단법 개발
김은미 ( Eun Mi Kim ),전효성 ( Hyo Sung Jeon ),김지정 ( Ji Jung Kim ),김희정 ( Hee Jung Kim ),신연경 ( Yeun Kyung Shin ),송재영 ( Jae Young Song ),여상건 ( Sang Geon Yeo ),박최규 ( Choi Kyu Park ) 한국동물위생학회 2015 韓國家畜衛生學會誌 Vol.38 No.2
In this study, we developed a rapid, sensitive and specific reverse-transcriptase loop-mediated isothermal amplification (RT-LAMP) assay for detection of swine influenza viruse (SIV) including major subtypes of swine influenza viruses H1N1, H1N2 and H3N2, and a novel subtype of influenza A virus that accidentally infected in pig population. The RT-LAMP was completed in 40 min at 58oC and the sensitivity of the RT-LAMP (1 copy/ L) was 10-fold higher than conventional reverse transcription-polymerase chain reaction (RT-PCR) (10 copy/ L) and the same to real time RT-PCR (1 copy/ L). Also, the result of the RT-LAMP can be confirmed without any detection system. Therefore, the RT-LAMP could be a alternative diagnostic method for SIV detection in national SIV monitoring system and clinical diagnostic laboratory in the future.
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