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권혁영,이기성,이미경,이예경 이화여자대학교 의과대학 1979 梨花醫學誌 Vol.- No.11
The analytical data of general components and minerals in milk, chocolate milk and yoghurts were as follows; 1) Milk; Water content was about 89.2% and ash 0.73g%, lactose 4.7g%, protein 3.4g%, lipid 2.3g%, iron 0.09mg%, calcium 167.2mg% and magnesium 13.4mg% were obtained. 2) Chocolate milk: Water content was about 87.0% and ash 0.5g%, lactose 6.2g%, protein 2.4g%, lipid 1.4mg%, iron 0.1mg% calcium 118.6mg%, and magnesium 8.1mg% were obtained. 3) Yoghurt: Water content was about 81.2% and ash 0.22g%, lactose 3.7g%, protein 1.1g%, lipid 0.3g%, iron 0.06mg%, calcium 112.0mg% and magnesium 5.4mg% were obtained.
Kim, H.H.,Matthijnssens, J.,Kim, H.J.,Kwon, H.J.,Park, J.G.,Son, K.Y.,Ryu, E.H.,Kim, D.S.,Lee, W.S.,Kang, M.I.,Yang, D.K.,Hyun, B.H.,Park, S.I.,Park, S.J.,Cho, K.O. Elsevier Science 2012 INFECTION GENETICS AND EVOLUTION Vol.12 No.7
Group A rotaviruses (RVAs) are agents causing severe gastroenteritis in infants and young animals. G9 RVA strains are believed to have originated from pigs. However, this genotype has emerged as the fifth major human RVA genotype worldwide. To better understand the relationship between human and porcine RVA strains, complete RVA genome data are needed. For human RVA strains, the number of complete genome data have grown exponentially. However, there is still a lack of complete genome data on porcine RVA strains. Recently, G9 RVA strains have been identified as the third most important genotype in diarrheic pigs in South Korea in combinations with P[7] and P[23]. This study is the first report on complete genome analyses of 1 G9P[7] and 3 G9P[23] porcine RVA strains, resulting in the following genotype constellation: G9-P[7]/P[23]-I5-R1-C1-M1-A8-N1-T1-E1-H1. By comparisons of these genotype constellations, it was revealed that the Korean G9P[7] and G9P[23] RVA strains possessed a typical porcine RVA backbone, similar to other known porcine RVA strains. However, detailed phylogenetic analyses revealed the presence of intra-genotype reassortments among porcine RVA strains in South Korea. Thus, our data provide genetic information of G9 RVA strains increasingly detected in both humans and pigs, and will help to establish the role of pigs as a source or reservoir for novel human RVA strains.
Kim, J.A.,Im, K.O.,Park, S.N.,Kwon, J.S.,Kim, S.Y.,Oh, K.,Lee, D.S.,Kim, M.K.,Kim, S.W.,Jang, M.,Lee, G.,Oh, Y.M.,Lee, S.D.,Lee, D.S. Elsevier Science Publishers 2015 Mutation Research Vol.777 No.-
To minimize the risk of tumorigenesis in mesenchymal stem cells (MSCs), G-banding analysis is widely used to detect chromosomal aberrations in MSCs. However, a critical limitation of G-banding is that it only reflects the status of metaphase cells, which can represent as few as 0.01% of tested cells. During routine cytogenetic testing in MSCs, we often detect chromosomal aberrations in minor cell populations. Therefore, we aimed to investigate whether such a minority of cells can expand over time or if they ultimately disappear during MSC passaging. We passaged MSCs serially while monitoring quantitative changes for each aberrant clone among heterogeneous MSCs. To investigate the cytogenetic status of interphase cells, which represent the main population, we also performed interphase FISH analysis, in combination with G-banding and telomere length determination. In human adipose tissue-derived MSCs, 4 types of chromosomal aberrations were found during culturing, and in umbilical cord MSCs, 2 types of chromosomal aberrations were observed. Sequential dynamic changes among heterogeneous aberrant clones during passaging were similar to the dynamic changes observed in cancer stem cells during disease progression. Throughout all passages, the quantitative G-banding results were inconsistent with those of the interphase FISH analysis. Interphase FISH revealed hidden aberrations in stem cell populations with normal karyotypes by G-banding analysis. We found that telomere length gradually decreased during passaging until the point at which cytogenetic aberrations appeared. The present study demonstrates that rare aberrant clones at earlier passages can become predominant clones during later passages. Considering the risk of tumorigenesis due to aberrant MSCs, we believe that our results will help to establish proper safety guidelines for MSC use. In particular, we believe it is critical to test for chromosomal aberrations using both G-banding and FISH to ensure the safety of human stem cells that are manufactured in vitro for clinical applications.
Genetic diversity of the VP7, VP4 and VP6 genes of Korean porcine group C rotaviruses
Jeong, Y.J.,Matthijnssens, J.,Kim, D.S.,Kim, J.Y.,Alfajaro, M.M.,Park, J.G.,Hosmillo, M.,Son, K.Y.,Soliman, M.,Baek, Y.B.,Kwon, J.,Choi, J.S.,Kang, M.I.,Cho, K.O. Elsevier Scientific Pub. Co 2015 Veterinary microbiology Vol.176 No.1
Porcine group C rotaviruses (RVCs) are considered important pathogens due to their economic impact on pig industry and may also cross the host species barrier toward humans. Unlike RVA, however, genetic and phylogenetic data on RVCs from pigs and other host species are scarce. In the present study, full-length ORF sequences of 26 VP7, 9 VP4 and 9 VP6 genes of Korean porcine RVC strains were compared with those of other known RVC strains by phylogenetic analyses and pairwise identity frequency graphs. Applying the established 85% nucleotide identity cut-off value for RVC VP7 classification, the 26 Korean porcine RVC strains belonged to the G1, G3, G6 and G7 genotypes. Although more complete RVC VP4 sequences are warranted before a definitive cut-off value could be determined, a provisional 83% nucleotide cut-off value proposed for RVC VP4 classification resulted in 7 P-genotypes, 5 of which possessed porcine RVC strains. A 90% nucleotide cut-off value for VP6 divided RVC strains into 7 I-genotypes, 5 of which had porcine RVC strains. G/P/I-genotype comparisons suggested the occurrence of rather frequent reassortment events among Korean porcine RVC strains, and strong geographical differences in the distribution of RVC G-genotypes worldwide. Our data indicate that a large genetic diversity exists among porcine RVC strains. For the final genotype determination of each gene segment, more intensified epidemiological studies on animal and human RVC strains throughout the world are needed.
Fractionation and gasification of black liquor derived from kraft pulping
Kwon, H.S.,Moon, J.H.,Lee, U.D.,Yoon, J.J.,Walsum, G.P.v.,Um, B.H. Korean Society of Industrial and Engineering Chemi 2016 Journal of industrial and engineering chemistry Vol.34 No.-
<P>By combining hydrolysis, it was observed that the maximum concentration of xylose + mannose + galactose (xmg) was 10.7 g/L at a CS of 1.72. The aliphatic acid, aromatic acid and aldehydes were released 29.8, 0.45 and 0.90 from the black liquor at CS of 1.19, 1.72, and 2.19, respectively. In the gasification using bench-scale bubbling fluidized bed (BFB) reactor, high-quality syngas (H-2/CO: 1.47) was obtained from the steam of acid-insoluble lignin (AIL), suitable for conventional energy systems such as gas engines, turbines, and boilers. (C) 2015 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.</P>
김길태,김도응,권봉재,유성호,진강규 한국해양대학교 산업기술연구소 2003 연구논문집 Vol.20 No.-
The container load planning is one of key factors for efficient operations of handling equipments at container ports. This paper presents the problem of determining the optimal loading sequence of the containers which a straddle crane (S/C) picks up for minimizing its total travel distance. To obtain a good solution with considerably small effort, a heuristic search procedure based on a symbolic genetic algorithm is developed. The performance of the proposed algorithm is demonstrated throught a test problem.
Prediction of a rectal temperature utilizing a thermal perception index
( Young G. Kwon ),( Jerry D. Ramsey ) 한국감성과학회 1998 춘계학술대회 Vol.1998 No.-
이 논문은 신체온도를 직접 측정하지 않고서 신체온도를 예상하는 모델을 연구한 것이다. 열감지지수 (TPI)를 개발하여 환경으로부터 느끼는 체감온도와 몸의 내부온도인 직장온도 (Trec)와 몸의 외부온도인 피부온도 (Tskin)를 예측하도록 하였다. Kwon과 Ramsey의 개발모델을 Goldman의 모델과 비교해본 결과 정확도에 통계적으로 유의한 차이가 없었다. 회귀분석과 경험을 토대로 만든 체감온도를 예측할 수 있는 손쉬운 Kwon의 열감지지수 (KTPI)도 제시하였다. 대부분의 사람들이 쉽게 예측할 수 있도록 측정 또는 사용가능한 몇 개의 환경변수로부터 쉽게 몸의 예상 내부온도와 외부온도를 계산할 수 있게 단순화하였다.