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RISS 인기검색어
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- 저자 : 김재우(J.W.Kim) (검색결과 34 건)
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하이니켈 양극재 전용 세라믹 내화갑(Box Sagger) 제조 기술 개발
권정현(J. H. Kwon),윤지환(J. H. Yun),김재우(J. W. Kim) 한국생산제조학회 2025 한국생산제조학회 학술발표대회 논문집 Vol.2025 No.7
고온 소성용 양극재 세라믹 내화갑(Sagger)는 리튬과 금속산화물을 혼합 후 고온(800~1100℃)에서 열처리하는 과정 중 혼합한 재료를 담아서 고온에서 합성시킬 수 있는 필수 용기이며, 글로벌 전기차 보급이 폭발적으로 증가함으로 인해 핵심소재인 양극재 와 세라믹 내화갑 수요도 함께 증가하고 있다. 기존 내화갑은 범용으로 개발되어 현재까지 차세대 양극재 까지 사용되고 있어 차세대 양극재 개발에 따라 소성 조건이 기존 약 800℃에서 최대 1,100℃ 수준으로 상승하면서, 내화갑의 수명이 평균 30~40회 사용에서 약 20회로 절반 이하로 급감하는 문제점이 발생한다. 용기 교체 주기가 두 배 빨라지게 되어 양극재 생산원가 상승의 주요인이 되어 제조사에게 큰 부담이 되고 있으며, 기존 내화갑은 리튬 화합물에 대한 내침식성이 낮아, 양극재 전구체 내 존재하는 수산화리튬(LiOH) 등이 용기 재질을 부식시켜 세라믹 조각이 박리되어 양극재에 혼입되는 사례가 발생하였다. 세라믹 용기에서 중요하게 요구되는 특성은 양극물질에 포함되어 있는 리튬성분에 의한 침식 및 반응이 적어야 되며, 양극물질을 합성하는 과정에서 고온에서 파손이 없어야 한다. 따라서 본 연구에서는 내침식성 및 수명 특성이 향상된 세라믹 내화갑을 개발하고자 연구를 진행하였다.
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김재우(J . W . Kim),여정수(J . S . Yeo),최창본(C . B . Choi) 한국축산학회 1994 한국축산학회지 Vol.36 No.5
In this study, genetic patterns within a family of Korean Native Chickens(KNC) were analyzed. Genomic DNA was extracted from KNC, and digested with the restriction enzyme, Hae III. DNA fingerprinting was applied to the digested DNA using the single stranded bacteriophage M13 DNA as a probe. A parentage tests were carried out with parent offspring. All bands appeared in offsprings were always originated selectively from either parent. Different banding patterns in DNA fingerprints were observed between the parent offspring and unrelated offspring. The results indicate that DNA fingerprinting is a powerful tool for keeping and maintaining pure KNC.
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유전 및 육종 : 한우에서 제한효소와 Probe 종류에 따른 유전자지문의 Polymorphism 에 관한 연구
여정수(J . S . Yeo),이은준(E . J . Lee),김재우(J . W . Kim) 한국축산학회 1996 한국축산학회지 Vol.38 No.6
In study for identification the best combination of restriction enzymes(Hae III, Hind III, Hinf I, BamH I, EcoR I) and DNA probes [M13, YNZ22, Mo-I, α-globin, 33.15, (GT)n] for DNA fingerprinting of Korean Cattle (Hanwoo), it was found that M13 and YNZ22 probes made clear polymotphic bands, restriction enzyme Hae III with all kinds of probes dispersed widely from high to low molecular weight of DNA fragements, and Hinf I located only low molecular fragements except M13 probe combination. This research can be concluded restriction enzyme Hae III and Hinf I with M13 and YNZ22 probes will be the best combination of DNA fingerprinting for Korean Cattle.
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유전 및 육종 : DNA 분석을 통한 한우 , 연변황우 및 화우의 유전적 특성
신원집(W . J . Shin),신수길(X . J . Shen),정진우(Z . Y . Zheng),김재우(J . W . Kim),이지홍(J . H . Lee),여정수(J . S . Yeo) 한국축산학회 1999 한국축산학회지 Vol.41 No.4
This study was conducted to identify the genetic parameters and genetic relationships among 3 cattle breeds of Hanwoo (Korea), Yanbian yellow cattle (China), and Wagyu (Japan). DNA fingerprinting was prepared using M13 probe and Pst 1 enzyme. Genetic homogencities of Hanwoo and Yanbian yellow cattle were comparatively lower than that of Wagyu, suggesting genetic improvement by active breeding program for Wagyu compared to Hanwoo and Yanbian yellow cattle and possibility of improvement capacity for Hanwoo and Yanbian yellow cattle. Genetic similarities between breeds were not significantly different among them, suggesting that these 3 breeds have been raised independently without any inflow or outflow of gene source for a while.
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유전 및 육종 : 한우의 일당 증체량에 연관된 DNA Marker 의 규명
김재우(J . W . Kim),여정수(J . S . Yeo),장태경(T . K . Jang),박노형(N . H . Park),이문연(M . Y . Lee) 한국축산학회 1999 한국축산학회지 Vol.41 No.4
DNA markers related to daily gain from 287 heads( 173 heads of bull and 114 heads of steer) of Hanwoo were found with distinct 3 kinds at 4.6, 3.6 and 2.8kb using DNA fingerprinting with M13/HaeIII and 2 kinds at 5.6 and 2.1kb with M13/Hinfl. It was evidently considered that 3 specific markers influenced to grow in Hanwoo, negative effect in 4.bkb and positive in o hers(3.6 and 2.8kbs) for daily gain and especially single effect at 3.bkb for bulls and combined effect of 4.6 arid 2.8 markers for steers were distinctive to daily gain with M13/HaeIII. Pedigreed pattern of specific markers with M13/HaeⅢ were observed with DNA bands at 2.8 and 3.bkb were dependent on sire. Under results of this research culling of 4.bkb marker and selection of 3.bkb marker in Hanwoo population can be expected to improve above 35㎏ at market body weight.
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초지 및 사료작물 : 한국재래돼지의 경제형질에 연관된 AFLP marker 의 분석
여정수(J . S . Yeo),김재우(J . W . Kim),장태경(T . K . Jang),박영애(Y . A . Park),이지홍(J . H . Lee) 한국축산학회 2000 한국축산학회지 Vol.42 No.3
DNA markers related to daily gain and backfat thickness of Korean Native Pig which were sustained as different characteristics from other breeds in DNA constitution were identified by AFLP (amplified fragment length polymorphism). Specific marker was found in lower group of daily gain showing greater influence in males and transmitted with dominant inheritance. DNA marker related to daily gain was tremsmatted to all of progenies from parent. In backfat thickness, marker related to thinner group was inherited only from sire to all progenies, not from dam. These DNA markers with different effects by sex will be useful tools to improve important economic traits in Korean Native Pig.
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유전 및 육종 : 재래대지 ( Korea Native Pigs ) 특이 genetic marker 와 육질 연관성 분석
김철욱(C . W . Kim),여정수(J . S . Yeo),조광근(K . K . Cho),진상근(S . K . Jin),오명곤(M . G .Oh),박준규(J . K . Park),권은정(E . J . Kwon),홍연희(Y . H . Hong),김지현(G . H . Kim),이보경(B . K . Lee),박다혜(D . H . Park),김재우(J . W . 한국축산학회 2001 한국축산학회지 Vol.43 No.6
This study was conducted to develop Korean native pig-specific DNA markers and analyze its relativity with meat quality using 30 of Korean native pigs and Landraces, respectively. To find species-specific DNA markers, we selected and tested a total of 60 microsatellite markers on the 4 and 7 chromosome using polymerase chain reaction (PCR). PCR amplification was carried out by microsatellite primer pairs labeled with fluorescent Fam, Hex and Ned. The fluorescent labeled PCR products were electrophoresed with Genetic Analyzer ABI 310 followed by the allelic and statistical analysis. According to the allelic frequency annalysis, of the 60 microsatellite markers 27 were preduced with a variety of genetic polymorphic alleles (p<0.05). Especially, alleles of SW1364, SW445, SW1369 and SWR773 microsatellite markers were identified to be species-specific markers between two breeds (p<0.01). To analyze the meat quality we determined the meat color, fat color, fat composition, cholesterol contents and hardness, and compared these characteristics with the alleles of 36 species-specific markers in all pigs. Of the 60 microsatellite markers 28 were found to be related with meat quality; 18 for meat and fat color, 7 for fatty acid, 4 for cholesterol contents and 10 for shear force and hardness. These selected markers will be useful in the genetic improvement of pigs for an excellent meat quality.
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유전 및 육종 : 한우의 근내지방도에 연관된 DNA Marker 의 규명
김재우(J . W . Kim),강태석(T . S . Kang),이지홍(J . H . Lee),이문연(M . Y . Lee),여정수(J . S . Yeo) 한국축산학회 2001 한국축산학회지 Vol.43 No.5
DNA markers related to marbling score were identified using DNA fingerprinting with M13 probe and restriction enzyme HaeⅢ from 336 heads(147 heads of bull and 189 heads of steer) of Hanwoo. It was found that distinct 2 kinds of specific markers at 9.4 and 3.6kb showing significant difference for marbling score. DNA Marker groups having either 9.4, 3.6 or 9.4/3.6kb showed higher frequency of meat quality grade 1 or 2 than the group having none-marker. Also, the group having 9.4kb showed 94.4% of grade 1, indicating that this marker is valuable for the improvement of meat quality and was able to separate completely the lowest beef grade no.3.
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