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김정도(J.D. Kim),정균식(K.S.Jung),이지웅(J.W.Lee),송영환(Y.H.Song),정찬호(C.H.Jeong),최재성(J.S. Choi) 한국마린엔지니어링학회 2010 한국마린엔지니어링학회 학술대회 논문집 Vol.2010 No.4
Marine auxiliary diesel engine of the ship that is being docked in the harbor so much time and main engine of naval vessel that is being posted for the guard are being operated in low load operation. In low load condition during long terms, it has been found the deterioration of performance and expected the shortened time between overhaul because of the reverse flow through the intake port and valves. In this paper, in marine diesel engine for generator, it was investigated the phenomena of reverse flow in gas passage regarding by the comparison of the pressures measured at intake port, exhaust port and cylinder simultaneously. And also it was examined the deteriorations by the comparison for the rate of heat release. Finally the possible improvement methods for this problem are proposed.
돈분 - 남은음식물 혼합 Extrusion 사료의 급여가 브로일러의 사양성적 , 체조성 및 섭식행동에 미치는 영향
김창혁,송영환,채병조,이영철 한국동물자원과학회 2001 한국축산학회지 Vol.43 No.1
This study was conducted to investigate the feeding effects of extruded swine manure-food waste(ESF) mixture on growth performance, body composition and feeding behaviour in broiler chicks. The ESF mixture was composed of 40% swine manure, 40% food waste and 20% corn. Crude protein content in diets was 21% for starter and 18% for finisher, but energy content was same(3,100 ㎉/㎏). Feeding trial was done for 6 weeks with 5 treatment groups; control, 10% ESF, 20% ESF, 30% ESF and 40% ESF. There was no significant difference(P$gt;0.05) in body weight gain among treatments, but feed conversion ratio was poor(P$lt;0.05) when the ESF was added 30% or 40% in diets as compared to control and ESF 10% group. Abdominal fat pad was significantly higher(P$lt;0.05) in control than in ESF groups. The contents of crude protein and crude fat in carcass were not significantly difference(P$gt;0.05) among treatments. Liver, crop and gizzard weights were significantly(P$lt;0.05) increased as ESF level increased, but the other organ were not influenced by dietary regimens. Feeding behaviour was greater in day times than in the night and was peaked at before and after draw feeds. Cumulative feeding behaviour was increased with fed higher ESF ratios. In summery, it is concluded that the ESF could he added up to 40% in broiler diets in trials of growth performance.
Yeast Transformation and Construction of Yeast Genomic Library for the Cloning of Adei Gene
강현삼,서연수,송영환 한국유전학회 1983 Genes & Genomics Vol.5 No.3
Total yeast DNA from Y321 strain was partially digested with the restriction endounclease, SAU3A and these were ligated into BamHI site of YRp7, which carries the yeast TRP1 gene as a selection marker. Enrichment for ampicillin-resistant, tetracycline sensitive E.coli transformants yielded a library prepared from this library and was used to transform yeast spheroplasts from SHY3. The desired clone was selected for TRP1+ and ADE1+. Selection for both markers was successful. Approximately 1.5×10^6 TRP1+ transformants yielded 19 TRP1+ and ADE1+ clones. In addition, 83 URA3+ and ADE1+ clones were selected from the library in which the vector YEp24 was used as a cloning vehicle with URA3 a selection marker. A restriction map of the plasmid containing ADE1 gene was constructed for the furture experiment.