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김유진,김수민,김소연,윤요한,Kim, Yujin,Kim, Soomin,Kim, Soyeon,Yoon, Yohan 한국식품위생안전성학회 2022 한국식품위생안전성학회지 Vol.37 No.3
The rapid development of biotechnology has increased the importance of microorganisms or their genetic information. Thus, the Nagoya Protocol on access to genetic resources and the fair and equitable sharing of benefits arising from their utilization was established, and countries are working to secure industrially and academically useful bioresources to deal with the agreement. In the case of Korea, because 67% of bioresources are imported from abroad, we are required to secure domestic bioresources as well. The number of isolated foodborne illness-causing microorganisms is predicted to invrease based on the incresing number of outbreaks of foodborne illness each year. Consequently, appropriate long-term preservation methods are necessary to secure the isolated microorganisms for the purpose of research and resourcification. Therefore, the long-term preservation methods for bacteria, fungi, viruses, and protozoa were investigated in this study, from domestic and international bioresource banks, and the functions of the cryoprotectants were reviewed and discussed. This review should be informative in the preservation of microorganisms and contribute to the development of biotechnology.
정공전달고분자와 유기형광염료의 혼합물 박막이 이용된 발광소자의 에너지 전달특성 연구
김유진,정숙,Kim, Eugene,Jung, Sook 한국전기전자재료학회 2004 전기전자재료학회논문지 Vol.17 No.11
Hole transporting polymer(poly[N-(p-diphenylamine)phenylmethacrylamide], PDPMA) was doped with nile red dye at various concentrations to study the influence of doping on the energy transfer during light emitting processes. Organic LEDs composed of ITO/blend(PDPMA -nile red)/ Alq$_3$/Al as well as thin films of blend(PDPMA -nile red)/ Alq$_3$ were manufactured for investigating photoluminescence, electroluminescence, and current-voltage characteristics. Atomic Force Microscopy was also used to observe surface morphology of the blend films. It was found that such doping. significantly influences the efficiency of the energy transfer from the Alq$_3$ layer to blended layer and the optical/electrical properties could be optimized by choosing the right concentration of the dye molecule. The results also showed a interesting correlation with the morphological aspect, i.e. the optimum luminescence at the concentration with the least surface roughness. When the concentration of nile red was 0.8 wt%, the maximum energy transfer could be achieved.
김유진,Kim Jun-Beom,송창선,Nahm Sang-Soep 아세아·태평양축산학회 2022 Animal Bioscience Vol.35 No.4
Objective: Surface disinfection is important in the proper running of livestock farms. However, disinfection of farm equipment and facilities is difficult because they are made of different materials, besides having large surface areas and complex structures. 3-(trimethoxysilyl)-propyldimethyloctadecyl ammonium chloride (Si-QAC) is a quaternary ammonium salt-based disinfectant that attaches to various surfaces by forming covalent bonds and maintains its disinfecting capacity for a considerable time. Our aim was to evaluate the potential use of Si-QAC for disinfection of farm equipment and facilities.Methods: The short- and long-term antimicrobial and antiviral effects of Si-QAC were evaluated in both laboratory and farm settings using modified quantitative assessment method based on the standard operating procedures of the United States Environmental Protection Agency.Results: Si-QAC was highly effective in controlling the growth of the Newcastle disease virus and avian pathogenic Escherichia coli. Electron microscopy revealed that the mechanism underlying the disinfection activity of Si-QAC was associated with its ability to damage the outer membrane of the pathogen cells. In the field test, Si-QAC effectively reduced viral contamination of surfaces of equipment and space.Conclusion: Our results suggest that Si-QAC has great potential as an effective chemical for disinfecting farm equipment and facilities. This disinfectant could retain its disinfection ability longer than other commercial disinfectants and contribute to better farm biosecurity.
후족부 질환이 있는 환자에서 Kager씨 삼각의 단순 방사선 상의 변화
김유진,신헌규,김종민,이용택,장기웅,Kim, Eu-Gene,Shin, Hun-Kyu,Kim, Jong-Min,Lee, Yong-Taek,Chang, Ki-Woong 대한족부족관절학회 2007 대한족부족관절학회지 Vol.11 No.2
Purpose: The aim of this study was to analyze radiological change of Kager's triangle in patients with retrocalcaneal disorders. Materials and Methods: Areas of Kager's triangle and calcaneus were calculated with Heron's Formula. Average of area ratio (area of Kager's triangle / area of calcaneus) was calculated for comparison and analysis, according to disease activity and aging process. One-tailed Z-test was done with the average of area ratio. Results: Average of area ratio (area of Kager's trianlge / area of calcaneous) tends to decrease according to aging process and disease existence. Conclusion: Because area of Kager's triangle in patients with retrocalcaneal disorders tends to change according to disease activity and aging process, we should consider clinical correlation between the anatomical structure of Kager's triangle and retrocalcaneal symptoms.
김유진,정귀재,공성호,신장순,윤길상,정우철,김건희,서태일,Kim, Yu-Jin,Jung, Gui-Jae,Gong, Sung-Ho,Shin, Jang-Soon,Yoon, Gil-Sang,Jung, Woo-Chul,Kim, Gun-Hee,Seo, Tae-Il 한국금형공학회 2008 한국금형공학회지 Vol.2 No.6
Recently, the demand of high-productivity injection mold increases since the consumption of packaging grows in the world. Stack mold is composed of more than two molds and it has very high productivity and economic efficiency. In advanced country, stack mold which has was developed already but, in occasion of domestic mold industry, there is no study of stack mold. In this study, die and mold of in-mold labeling was developed for securing the technique of manufacturing high-productivity mold.