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이경무,전재범,박동욱,이원진,Lee, Kyoung-Mu,Chun, Jae-Buhm,Park, Dong-Uk,Lee, Won-Jin 한국환경보건학회 2011 한국환경보건학회지 Vol.37 No.5
Healthy worker effect (HWE) refers to the consistent tendency for actively employed individuals to have a more favorable mortality experience than the population at large. Although HWE has been well known since the 1970s, only a few studies in occupational epidemiology have attempted to fully define and evaluate HWE. HWE can be separated into effects on the initial hiring into the workforce (healthy worker hire effect) and those on continuing employment (healthy worker survival effect). In this review, we summarize the methods for minimizingor adjusting for the healthy worker effect available in occupational epidemiology. It is noteworthy that healthy worker survival effect appears complicated, considering that employment status plays simultaneous roles as a counfounding variable and intermediate variable, whereas healthy worker hire effect may be adjusted by incorporating health status at baseline into the statistical model. In addition, two retrospective cohort studies for workers in the semiconductor industry and Vietnam veterans in Korea, respectively, were introduced, and their results were explained in terms of healthy worker effect.
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유색미 도입 유전자원의 생육 및 품질특성 변이 다변량 분석
박종현,이지윤,전재범,유오종,손은호,Park, Jong-Hyun,Lee, Ji-Yoon,Chun, Jae-Buhm,You, Oh-Jong,Son, Eun-Ho 한국작물학회 2018 한국작물학회지 Vol.63 No.3
The aim of this study was to evaluate the variation of growth and quality characteristics in colored rice from 178 accessions and to develop useful, basic rice breeding data by classifying these germplasm characteristics via principal component (PC) analysis. The coefficient of variation of the 178colored rice accessions were the highest for panicle length (PL) and protein contents, followed by length-width ratio (LWR), 1000-grain weight (TGW), culm length (CL), and amylose contents, whereas the lowest was for the number of panicles per hill (NP), which is a yield component. The results from the PC analysis exhibited eigenvalues and contributions respective to each PC as follows: PC1, 2.06 and 29.49%; PC2, 1.31 and 18.75%; PC3, 1.21 and 17.36%; PC4, 1.01 and 14.38%. The eigenvalues of four PCs were over 1.0, and their cumulative contributions were 79.98%, which completes the necessary condition for evaluation of the 178 colored rice accessions. Cluster analysis showed cluster I as the largest, which included 79 accessions, while clusters II, III, IV, V, VI, and VII comprised 46, 19, 13, 4, 8, and 9 accessions, respectively. Moreover, dark brown accessions were dispersed in clusters I and II, and many resources of purple seed coat color were found in clusters V, VI, and VII. Particularly, cluster V had resources of only black and purple seed coat colors. Resources of cluster VII were found to have a relatively small average CL, PL, and LWR; notably, cluster V had the smallest average TGW, and cluster IV the lowest NP but the highest TGW. Finally, considering the yield potential, growth characteristics, heading stage, and color during breeding of colored rice, we obtained the following conclusions: cluster VII is suitable for breeding of colored rice; cross breeding among clusters I, II, and VII has a high yield potential; and it is possible to produce a superior color by cross breeding plants from cluster V and VI.
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윤미라(Mi-Ra Yoon),이점식(Jeom-Sig Lee),곽지은(Jieun Kwak),이정희(Jeong-Heui Lee),전재범(Jae-Buhm Chun),양창인(Chang-Ihn Yang),조준현(Jun-Hyun Cho),김미정(Mi-Jung Kim),이춘기(Choon-Ki Lee),김보경(Bo-Kyeong Kim),김욱한(Wook-Han Kim) 한국육종학회 2015 한국육종학회지 Vol.47 No.3
This study was conducted to analyze the starch and pasting properties of fourteen glutinous rice varieties with different maturity, and we compared the textural characteristic difference in relation to stickiness of glutinous rice cake. The whiteness alues of grain appearance showed significantly differences in the order of early ˂ medium < mid-late maturing glutinous rice varieties. Early maturing glutinous rice varieties exhibited a little high tendency for crude protein content than that of other varieties. Mid-late glutinous rice varieties showed higher of short chain ratio of 6 to 12 in DP of amylopectin whereas, medium length chains of 13 to 24 were significantly low. According to Rapid Visco-Analyzer measurement glutinous rice flours and starches, peak time showed high negative correlation with short chains of 6 to 12 in DP. The hardness of mid-late maturing glutinous rice cake was distinctly lower than that of the other glutinous rice varieties. Furthermore, mid-late maturing glutinous rice varieties, Baegseolchal, Dongjinchal and Baekogchal tend to show lower and slower in hardness changes of rice cake during storage. The hardness changes of glutinous rice cake had positive correlation with the amylose content and peak time and negative correlation with short chains of 6 to 12 in DP of amylopectin, respectively.
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최광호 ( Kwang Ho Choi ),구태원 ( Tae Won Goo ),김성렬 ( Seong Ryul Kim ),김성완 ( Sung Wan Kim ),전재범 ( Jae Buhm Chun ),박승원 ( Seoung Won Park ),강석우 ( Seok Woo Kang ) 한국잠사학회 2013 한국잠사곤충학회지 Vol.51 No.2
This study was aimed for development of a useful genes that has a transcript expressional specificity in the early embryonic stage of the silkworm, Bombyx mori. We constructed and analyzed a full-length cDNA library from silkworm`s eggs which after a lapse of 2 ~ 6 hours post oviposit. A total 960 clones were randomly selected, and the 5` ends of the inserts were sequenced to generate 652 expressed sequence tags (EST). 334 unique ESTs were generated after the assembly of 652 ESTs. The annotation of 334 unique ESTs by BLAST search revealed that 156 (47%) of the sequences represented known genes, whereas 178 (53%) of the sequences has no matches in the database. Of the 156 known genes, the most abundant genes were heat shock protein hsp20.8 gene (12 times) and ubiqutin-like protein gene (11 times). The functional groups of these ESTs with matches in the database were constructed according to their putative molecular functions. Among thirteen functional categories, the largest groups were protein synthesis (9.6%) and cellular organization (8.1%). Further defined studies on molecular functions and biological roles of their promoters will give us well-fined information and its application.
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