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허남양,장훈석 용인대학교 국제스포츠과학연구원 체육과학연구소 2008 體育科學硏究論叢 Vol.18 No.1
The purpose of this study was to analysis of the result, Seeks the physical elements which influence to non-distance. The research which sees gives and the man a junior golf players and 7 people professional golf players after criminal record and analyzes the physical VIP whom the which is periodic in the object to execute training, measures to non-distance in method of training reaches most plentifully is first, the pliability, criticism formation, agility and muscular endurance all increase, all appeared with the fact that is the difference which considers statistically. Second, non-distance and pliability (r=.458), criticism formation (r=.119) and agility (r=.717) the interrelation does not consider statistically not to be, only the muscular endurance VIP non-distance and appeared with the fact that is the interrelation (r=.872) which is static (+) considers statistically (p=.011). Three, in the physical VIP appeared with the fact that only the resultant muscular endurance VIP who executes the phased (stepwise) regression analysis affects in non-distance.
Removal of Perchlorate Using Reverse Osmosis and Nanofiltration Membranes
Jong Hun Han,Choong Sik Kong,Ji Yong Heo,Yeo Min Yoon,Hee Bum Lee,Nam Guk Her 대한환경공학회 2012 Environmental Engineering Research Vol.17 No.4
Rejection characteristics of perchlorate (ClO₄ -) were examined for commercially available reverse osmosis (RO) and nanofiltration (NF) membranes. A bench-scale dead-end stirred-cell filtration system was employed to determine the toxic ion rejection and the membrane flux. Model water solutions were used to prepare ClO₄- solutions (approximately, 1,000 ug/L) in the presence of background salts (NaCl, Na₂SO₄, and CaCl₂) at various pH values (3.5, 7, and 9.5) and solution ionic strengths (0.001, 0.01, and 0.01 M NaCl) in the presence of natural organic matter (NOM). Rejection by the membranes increased with increasing solution pH owing to increasingly negative membrane charge. In addition, the rejection of the target ion by the membranes increased with increasing solution ionic strength. The rejection of ClO₄- was consistently higher for the RO membrane than for the NF membrane and ClO₄ - rejection followed the order CaCl₂ < NaCl < Na₂SO₄ at conditions of constant pH and ionic strength for both the RO and NF membranes. The possible influence of NOM on ClO₄- rejection by the membranes was also explored
Jung-Hun Moon,Sang-Kyu Lee,Kyung-Hee Kim,Moon-Seok Kang,Hwa-Young Heo,Young-Up Kwon,Jung-Hyun Nam,Yong Weon Seo,Byung-Moo Lee 韓國作物學會 2003 Korean journal of crop science Vol.48 No.1
Immature and mature embryos of 18 Korean wheat genotypes were cultured in vitro to develop an efficient method of callus formation and plant regeneration, and to compare the responses of both embryo cultures. Immature and mature embryos were placed on a solid agar medium containing the MS salts and vitamins, 30g/l maltose, 2 mg/l 2,4-dichlorophenoxyacetic acid (2,4-D), and amino acids. The developed calli were maintained on regeneration medium containing MS salts and B5 vitamins, 20 g/l sucrose, and the combination of two plant growth regulators, 6-benzylaminopurine (BAP) and indole-3-acetic acid (IAA). Immature embryos in most genotypes showed high efficiency of callus induction except three genotypes; Eunpamil, Chunggemil, and Namhaemil, and significant differences among the genotypes. Plant regeneration of calli induced from immature embryos showed high efficiency in Geurumil (56.5%), Tapdongmil (50.5%), Gobunmil (45.5%), and Urimil(42.2%). The analysis of variance showed significant differences for regeneration frequency among the genotypes. Mature embryos showed low callus induction frequency compared with that in immature embryos, and significant differences among the genotypes. Plant regeneration of calli induced from mature embryos showed high efficiency in Keumkangmil (33.33%), Tapdongmil(28.13%), and Geurumil (27.78%). The analysis of variance showed significant differences for plant regeneration frequency among the genotypes.
고위도 지역에서 내한성 차나무 육성을 위한 국내외 수집종의 생육 및 특성분석
허남기(Nam-Kee Heo),이광재(Kwang-Jae Lee),김희연(Hee-yeon Kim),임상현(Sang-hyen Leem),함헌주(Heon-Joo Ham),김경희(Kyeng-Hee Kim),이철훈(Cheol-Hun Lee),한상섭(Sang-seob Han) 한국차학회 2010 한국차학회지 Vol.16 No.2
This study investigated the genetic characteristics of tea tree lines collected both in Korea and abroad via a functional analysis of growing features such as cold hardiness. The purpose of this study was to determine the conditions required for the stable cultivation of tea trees in Goseong at high altitudes and under climatic conditions less favorable than those in southern regions. In accordance with the analysis, 8 lines including GS 1 showed stronger cold hardiness than Yabukida, the standard variety, and the harvest period was faster by 1 to 4 days compared to Yabukida. The number of leaves per stock was 102 to 155 in 6 lines. In accordance with the analysis on indoor freezing (EC), 16 lines had high resistance to freezing with LT50 (winter killing temperature) from -10.15 to -12.42oC. The total catechin content was 4.79 to 7.16%, similar to or lower than that of Yabukida. However, GS 8 and GS 15 had higher GCg and ECg values, respectively. The GS 7 and GS 18 lines had lower caffeine content, whereas the tannin content was lower in the G21 line. RAPD classified the varieties into 3 groups based on 75% similarity. It was found that 3 lines, GS 15, GS 19 and GS 21, were genetically very similar. It was estimated that 5 lines, GS 15, 16, 19, 21 and GS 22, which were selected according to strong cold hardiness, can be grown as promising lines at high altitudes.
연료전지용 밸브의 연속통전 시험 및 평가 방안에 관한 연구
윤소남(So-Nam Yun),김동건(Dong-Gun Kim),정황훈(Hwang-Hun Jeong),허덕열(Duk-Yeal Heo) 한국자동차공학회 2011 한국자동차공학회 부문종합 학술대회 Vol.2011 No.5
The solenoid valve is the control device for the work fluid that is driven by the internal electromagnet. And this electromagnet is worked by the current in the coil that will generate the magnetic field. This coil can change the resistance value when it is heated by the continuously applied current because it has a long length relatively. The attraction force in the solenoid valve is propotional to current in the coil and the changing of the resistance value in the coil affects to the reliability of the total system that used the solenoid valve. The work fluid in the fuel cell is explosible gas. Thus, the component that used in the fuel cell is needed a high reliability for the wrong operation protection. For this reliability of components, the continuously applied electric test is need even if that components already have the durability test and the environmental one. This study deals with the continuously applied electric test on the substitution preventing valve. Firstly, the continuously applied electric test is defined from the korean standard of general purpose solenoid valve for the substitution preventing valve. And then, the substitution preventing valve is taken the basic characteristic test when the continuously applied electric test was finished. Finally, the reliability of the substitution preventing valve is verified from the test results in the fuel cell.