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최연옥,이열선,서진연,한승조,조금배 조선대학교 동력자원연구소 1997 動力資源硏究所誌 Vol.19 No.1
A complete computerized system for the characterization and performance testing of photovoltaics(PV) modules under natural sunlight and ambient condition was designed. I-V characteristics of PV module provides on essential diagnostic means in assessing the performance and internal cell parameters of PV module depends on its basic materials, manufacturing technology and operating environmental conditions. I-V curves derived from PV modules refect to a large extent the physical properties and their expected performance. In this paper, Electrical performance measurement and evaluation methods for solar cell module by MOSFET variable Load were studied. Also, Mathematical model and theory of solar cell associated with the photovoltaic effect has been discribed.
Crack-Release Transfer Method of Wafer-Scale Grown Graphene Onto Large-Area Substrates
Lee, Jooho,Kim, Yongsung,Shin, Hyeon-Jin,Lee, ChangSeung,Lee, Dongwook,Lee, Sunghee,Moon, Chang-Yul,Lee, Su Chan,Kim, Sun Jun,Ji, Jae Hoon,Yoon, Hyong Seo,Jun, Seong Chan American Chemical Society 2014 ACS APPLIED MATERIALS & INTERFACES Vol.6 No.15
<P>We developed a crack-release graphene transfer technique for opening up possibilities for the fabrication of graphene-based devices. Graphene film grown on metal catalysts/SiO<SUB>2</SUB>/Si wafer should be scathelessly peeled for sequent transferring to a target substrate. However, when the graphene is grown on the metal catalyst on a silicon substrate, there is a large tensile stress resulting from the difference of the coefficient of thermal expansion in the catalyst and silicon. The conventional methods of detaching graphene from metal catalysts were found to induce considerable mechanical damage on graphene films during separation processes including metal wet etching. Here we report a new technique wherein bubbles generated by electrolysis reaction separate thin metal catalysts from the SiO<SUB>2</SUB>/Si wafer. The dry attachment of graphene to the target wafer was processed utilizing a wafer to wafer bonding technique in a vacuum. We measured the microscopic image, Raman spectra, and electrical properties of the transferred graphene. The optical and electrical properties of the graphene transferred by the bubbles/dry method are better than those of the graphene obtained by mechanical/wet transfer.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/aamick/2014/aamick.2014.6.issue-15/am502565z/production/images/medium/am-2014-02565z_0005.gif'></P>
Lee, Yu Young,Park, Hyang Mi,Hwang, Tae Young,Kim, Sun Lim,Kim, Mi Jung,Lee, Seuk Ki,Seo, Min Jung,Kim, Kee Jong,Kwon, Young‐,Up,Lee, Sang Chul,Kim, Yul Ho John Wiley Sons, Ltd 2015 Journal of the Science of Food and Agriculture Vol.95 No.4
<P><B>Abstract</B></P><P><B>BACKGROUND</B></P><P>Tocopherols are crucial lipid‐soluble antioxidants and essential nutrients. There is increasing interest in the biofortification of crops with vitamin E for reducing micronutrient malnutrition. However, relatively little is known about the development of soybean cultivars with high levels of tocopherol through combined breeding.</P><P><B>RESULT</B></P><P>Tocopherol contents of seeds and germinating seeds of 28 Korean soybean cultivars were analyzed and evaluated for health‐promoting activities. Total tocopherol concentrations ranged from 203.9 to 503.1 µg g<SUP>−1</SUP> in seeds and from 20.1 to 230.1 µg g<SUP>−1</SUP> in germinating seeds. The traditional landraces of HaNagari (HN, 503.1 µg g<SUP>−1</SUP>), Orialtae (OL, 486.6 µg g<SUP>−1</SUP>), SuMoktae (SM, 476.5 µg g<SUP>−1</SUP>) and SoRitae (SR, 475.5 µg g<SUP>−1</SUP>) showed high levels of tocopherol content. The contents of the four isomers of tocopherol in seeds and germinating seeds were correlated with lipid peroxidation. The γ‐ and δ‐tocopherol contents in seeds were related to 1,1‐diphenyl‐2‐picrylhydrazyl free radical scavenging activity (0.434; <I>P</I> < 0.01 and 0.373; <I>P</I> < 0.05).</P><P><B>CONCLUSION</B></P><P>Total tocopherol content was higher in soybean landraces as compared with modern cultivars developed by cross‐breeding. These results suggest that soybean breeding is necessary to increase tocopherol levels. © 2014 Society of Chemical Industry</P>
Diffuse Neonatal Hemangiomatosis Successfully Treated with High Dose Corticosteroid
Lee, Jong Suk,Lee, Sung Yul,Seo, Yong Won,Lee, Hye Kyung,Whang, Kyu Uang 대한피부과학회 1998 Annals of Dermatology Vol.10 No.2
Diffuse neonatal hemangiomatosis is a fatal disorder characterized by multiple cutaneous and visceral hemangiomas. The organs most commonly affected are the gastrointestinal tract, brain, liver and lung. The complications are high output cardiac failure, gastrointestinal bleeding and hydrocephalus. We present a patient with diffuse neonatal hemangiomatosis associated with massive hepatic involvement and high output cardiac failure, which was successfully treated with high die corticosteroid.
A variant block-based comparative genomics method for the detection of functional loci in soybeans
Yul Ho Kim,Tae-Young Hwang,Hyang Mi Park,Seuk Ki Lee,Man Soo Choi,Seung woo Hwang,Kwang Ho Jeong,Min Jung Seo,Hong Tai Yun,Sun Lim Kim,Young-Up Kwon,Ho-Sung Yoon,Suk-Ha Lee,JongBhak,Sunghoon Lee 한국육종학회 2013 한국육종학회 심포지엄 Vol.2013 No.07
Although much effort has been made to find agronomically important loci in the soybean plant, extensive linkage disequilibrium and genome duplication have limited efficient genome-wide linkage analyses that can identify important regulatory genes. In this respect, recombination block-based analysis of cultivated plant genomes is a potential critical step for molecular breeding and target locus screening. We propose a new three-step method of detecting recombination blocks and comparative genomics of bred cultivars. It utilizes typical reshuffling features of their genomes, which have been generated by the recombination processes of breeding ancestral genomes. To begin with, mutations were detected by comparing genomes to a reference genome. Next, sequence blocks were examined for likenesses and difference with respect to the reference genome. The boundaries between the blocks were taken as recombination sites. All recombination sites found in the cultivar set were used to split the genomes, and the resulting sequence fragments were named as core recombination blocks (CRBs). Finally, the genomes were compared at the CRB level, instead of at the sequence level. In the genomes of the five Korean soybean cultivars used, the CRB-based comparative genomics method produced long and distinct CRBs that are as large as 22.9 Mb. We also demonstrated efficiency in detecting functionally useful target loci by using indel markers, each of which represents a CRB. We further showed that the CRB method is generally applicable to both monocot and dicot crops, by analyzing publicly available genomes of 31 soybeans and 23 rice accessions.
User friendly molecular breeding platform by analyzing soybean genomes
Yul Ho Kim,Tae-Young Hwang,Hyang Mi Park,Seuk Ki Lee,Man Soo Choi,Kwang Ho Jeong,Min Jung Seo,Hong Tai Yun,Sun Lim Kim,Young-Up Kwon,Ik-Young Choi,Ho-Sung Yoon,Suk-Ha Lee,Jong Bhak,Sunghoon Lee 한국육종학회 2012 한국육종학회 심포지엄 Vol.2012 No.07
Resequencing data is actively used for searching QTL or analyzing genetic diversity in the crops. However, the complexity of genome, caused by genome duplication, limits the utility of genome-wide association studies and linkage analyses to identify genes that regulate agronomically valuable traits. Here, we propose a comparative genomics approach based on core or common variation-based recombination blocks (CRB) using single nucleotide variation (SNV) density information. We found that the soybean genomes are assembled with long and distinct CRBs as large as 10Mb. CRB-based comparative genomics enabled us to accurately identify recombination blocks at the whole-chromosome level. We identified the Ih locus that determines the yellow hilum color in soybeans using CRB-based mapping with representative indel markers. These results suggest that the CRB-based comparison method is a promising platform for molecular breeding and map-based cloning.
석유계 플라스틱 사용 저감을 위한 화이트바이오 산업 활성화 방안 연구
이서율 ( Seo-yul Lee ),권순길 ( Soon-gil Kwon ),김영운 ( Young-woon Kim ),황용우 ( Yong-woo Hwang ) 한국폐기물자원순환학회(구 한국폐기물학회) 2021 한국폐기물자원순환학회 춘계학술발표논문집 Vol.2021 No.-
1930년부터 도입된 플라스틱은 분해 기간이 길고 잘 썩지 않는다는 환경적 특성으로 가끔 사회 문제를 발생시키고 결국 맹독성의 다이옥신 검출, 유명한 플라스틱 오염 문제이었던 미세 플라스틱의 해양 오염 실태뿐만 아니라 최근 이슈가 되고 있는 매립을 통한 토양 미생물 영향 등과 같은 심각한 환경 오염의 원인으로 대두되고 있다. 석유계 플라스틱 매립시 토양오염을 저감하기 위한 유일한 방안으로 화이트바이오 산업의 육성하는 것이다. 석유계 플라스틱은 온실가스인 이산화탄소 분해되어도 미세 입자가 남아 미세 플라스틱 문제 유발하지만 화이트바이오 산업 핵심인 바이오 플라스틱은 생산 과정에서 이산화탄소 배출량도 비교적 적지만, 원료인 식물 등 바이오매스가 이산화탄소를 흡수하여 탄소 중립적이고 6개월에서 1년 사이에 완전분해된다. 따라서, 본 연구에서는 토양 내 미치는 오염을 저감하기 위한 화이트바이오 산업을 활성화하는 방안을 기존 폐플라스틱 발생 및 처리현황과 바이오 플라스틱 생산현황과 비교하여 제시하였다. 연구 결과, 우리나라의 폐플라스틱 발생량은 생활계폐기물 기준으로 2017년 대비 2018년에 8.9% 증가되었다. 2018년 폐플라스틱 발생량 중 재활용 40%, 소각 45%, 매립 15%였다. 2018년 폐플라스틱 매립량은 934톤으로 2017년 대비 4% 증가되었다. 한편, 전세계 바이오 플라스틱의 연간 생산량은 2017년 약 36만 톤으로 아직까지 재활용 포함한 전체 플라스틱 시장에서 차지하는 비중은 0.3%로 미미한 수준이나, 바이오플라스틱은 2020년에는 345만 톤에 육박하였다. 국내에서도 향후 5,000톤 생산계획이 있다. 따라서, 폐플라스틱 매립량과 바이오플라스틱의 생산현황을 비교하여 볼 때, 바이오 플라스틱을 활성화하게 되면, 폐플라스틱 매립량은 저감되어 토양오염을 저감할 수 있을 것이다.
Wonhoon Lee,Jieun Lee,Taeseon Lee,Hong Yul Seo,Minho Lee,Seunghwan Lee,Ki-Jeong Hong 한국응용곤충학회 2019 한국응용곤충학회 학술대회논문집 Vol.2019 No.04
Cinara (Cinara) cedri cedri Mimeur, 1936 is extensively distributed in Europe (France, Italy, Spain, and UK), North Africa (Morocco and Algeria), North America (California and New York), South America (Argentina), Middle East (Cyprus, Iran, Iraq, Israel, Lebanon, Syria, and Turkey), and Asia (China). Recently, this species was also invaded into China. In 2018, C. (Cinara) cedri cedri was firstly discovered on one plant, Cedrus deodara, in Korea. In this study, we provide full redescription in detail.