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문윤호(Youn-Ho Moon),구본철(Bon-Cheol Koo),최용환(Yoyng-Hwan Choi),안승현(Seung-Hyun Ahn),박선태(Surn-Teh Bark),차영록(Young-Lok Cha),안기홍(Gi-Hong An),김중곤(Jung Kon Kim),서세정(Sae-Jung Suh) 韓國雜草學會 2010 Weed&Turfgrass Science Vol.30 No.4
억새의 식물학적인 분류 및 형태, 선진국의 억새 육종, 재배 및 이용 현황 그리고 우리나라의 억새 연구성과 등을 고찰함으로서 향후 우리나라 에너지 자급율 제고를 위한 억새 연구방향을 제시하고자 국내외 연구결과를 요약하면 다음과 같다. 억새속 식물에는 17개종이 존재하는데 이 중 바이오 에너지용으로 중요한 종은 한국 등 동아시아가 원산인 참억새(M. sinensis)와 물억새(M. sacchariflorus) 그리고 이들 두 종의 종간 교잡종인 3배체 억새(M. x giganteous) 등이다. 여러 가지 에너지작물 중 억새는 연간 바이오매스 수량이 많고 저온, 염해, 습해 등 열악 환경 적응성과 질소이용효율이 우수하며 에너지 산출/투입 수지가 가장 높고 지상부 줄기와 땅속줄기에 다량의 탄소를 저장하기 때문에 탄수수지가 가장 높다. 유럽, 미국 및 캐나다 에서는 1930년대부터 일본으로부터 3배체 억새를 도입하여 연료용 펠릿 생산, 열병합발전, 양액재배 배지, 건축자재 및 강화 플라스틱 원료로 이용한다. 현재 재배되는 3배체 억새 단점보완을 위한 품종육성연구와 사탕수수와 억새교잡종인 "Miscane" 육성 연구가 진행되고 있다. 우리나라에서는 2007년 억새 유전자원 수집이 착수된 이후 2009년에 바이오매스 수량이 많은 "거대억새1호"와 억새를 증식효율을 높일 수 있는 "억새대량증식방법"을 개발하였다. 향후 우리나라 억새산업 발전을 위해서는 분자육종 등 새로운 육종기법을 활용하여 우리나라뿐만 아니라 해외에서도 재배할 수 있는 우량 신품종을 육성하는 한편 바이오매스의 전처리, 당화 및 발효 등 셀룰로오스계 에탄올 생산공정에 관한 연구도 강화해야 할 것이다. In order to suggest correct direction of researches on Miscanthus spp. which are promising bioenergy crop, authors had reviewed and summarized various literature about botanical taxonomy, morphology and present condition of breeding, cultivation and utilization of miscanthus. Among the genus of Miscanthus which are known 17 species, the most important species are M. sinensis and M. sacchariflorus which origin are East Asia including Korea, and M. x giganteus which is inter-specific hybrid of tetraploid M. sacchariflorus and diploid M. sinensis. Miscanthus is superior to other energy crops in resistance to poor environments including cold, saline and damp soil, nitrogen utilization efficiency, budget of input energy and carbon which are required for producing biomass and output which are stored in biomass. The major species for production of energy and industrial products including construction material in Europe, USA and Canada is M. x giganteus which was introduced from Japan in 1930s. In present, many breeding programs are conducted to supplement demerits of present varieties and to develop "Miscanes" which is hybrid of miscanthus and sugar cane. In Korea, the researches on breeding and cultivation of miscanthus were initiated in 2007 by collecting germplasms, and developed "Goedae-Uksae 1" which is high biomass yield and "mass propagation method of miscanthus" which can improve propagation efficiency in 2009. In order to develop "Korean miscanthus industry" in future, the superior varieties available not only domestic but also foreign market should be developed by new breeding method including molecular markers. Researches on production process of cellulosic bio-ethanol including pre-treatment and saccharification of miscanthus biomass also should be strengthen.
단수수 착즙액으로부터 에탄올 생산을 위한 반응표면분석법을 이용한 효모 발효조건 최적화
차영록(Cha, Young-Lok),박유리(Park, Yu-Ri),김중곤(Kim, Jung-Kon),최용환(Choi, Yong-Hwan),문윤호(Moon, Youn-Ho),박선태(Bark, Surn-Teh),안기홍(An, Gi-Hong),구본철(Koo, Bon-Cheol),박광근(Park, Kwang-Geun) 한국신재생에너지학회 2011 신재생에너지 Vol.7 No.4
Optimization of initial total sugar concentration of sweet sorghum juice, aeration time and aeration rate on ethanol production was performed by response surface methodology (RSM). The optimum conditions for ethanol production from concentrated sweet sorghum juice were determined as follows: initial total sugar concentration, 21.2 Brix; aeration time, 7.66h; aeration rate, 1.22 vvm. At the optimum conditions, the maximum ethanol yield was predicted to be 91.65% by model prediction. Similarly, 92.98% of ethanol yield was obtained by verification experiment using optimum conditions after 48 h of fermentation. This result was in agreement with the model prediction.
억새 바이오매스 전처리에서 압출 처리가 액상 암모니아 침지 처리에 미치는 영향
박선태(Bark, Surn-Teh),구본철(Koo, Bon-Cheol),최용환(Choi, Yong-Hwan),문윤호(Moon, Youn-Ho),안승현(Ahn, Seung-Hyun),차영록(Cha, Young-Lok),김중곤(Kim, Jung-Kon),안기홍(An, Gi-Hong),서세정(Suh, Sae-Jung),박돈희(Park, Don-Hee) 한국신재생에너지학회 2010 신재생에너지 Vol.6 No.4
Pretreatment of cellulosic biomass is necessary before enzymatic saccharification and fermentation. Extrusion is a well established process in food industries and it can be used as a physicochemical treatment method for cellulosic biomass. Aqueous ammonia soaking treatment at mild temperatures ranging from 60 to 80?C for longer reaction times has been used to preserve most of the cellulose and hemicellulose in the biomass. The objective of this study was to evaluate the effect of extrusion treatment on aqueous ammonia soaking method. Extrusion was performed with miscanthus sample conditioned to 2mm of particle size and 20% of moisture content at 200?C of barrel temperature and 175rpm of screw speed. And then aqueous ammonia soaking was performed with 15%(w/w) ammonia solution at 60?C for 1, 2, 4, 8, 12 hours on the extruded and raw miscanthus samples respectively. In the combined extrusion-soaking treatment, most compositions removal occurred within 1~2 hours and on a basis of 1 hour soaking treatment values, cellulose was recovered about 85% and other compositions, including hemicellulose, are removed about 50% from extruded miscanthus sample. The combined extrusion-soaking treated and soaking only treated samples were subjected to enzymatic hydrolysis using cellulase and {beta}-glucosidase. The enzymatic digestibility value of combined extrusion-2 hours soaking treated sample was comparable to 12 hours soaking only treated sample. It means that extrusion treatment can shorten the conventional long reaction time of aqueous ammonia soaking. The findings suggest that the combination of extrusion and soaking is a promising pretreatment method to solve both problems for no lignin removal of extrusion and long reaction time of aqueous ammonia soaking.
박희명 ( Hi Myung Park ),윤영길 ( Young Gil Yun ),박갑석 ( Kab Suk Park ),최용환 ( Youn Hwan Choi ) 대한내과학회 1973 대한내과학회지 Vol.16 No.3
A clinical observation was made on 92 cases of myocardial infarction seen at the Kyungpook University Hospital from January 1958 to December 1969, and pertinent data were reviewed. The morbidity was much higher in male than in female, the ratio being appro
박선태(Bark, Surn-Teh),구본철(Koo, Bon-Cheol),최용환(Choi, Yong-Hwan),문윤호(Moon, Youn-Ho),차영록(Cha, Young-Lok),김중곤(Kim, Jung Kon),안기홍(An, Gi Hong),박광근(Park, Kwang-Geun),박돈희(Park, Don-Hee) 한국신재생에너지학회 2011 한국신재생에너지학회 학술대회논문집 Vol.2011 No.11
쌀을 주식으로 하는 우리나라의 여건상 연간 추정치로 싸라기 약 12만톤, 미강 약 49만톤, 왕겨 약 79만톤의 벼 도정 부산물이 발생하고 있다. 본 연구에서는 벼 도정 부산물 중 비식량 자원인 왕겨를 대상으로 고효율 효소 당화를 위한 바이오매스 전처리 방법을 탐색하였다. 왕겨 원시료의 초기 조성은 셀룰로스 34.5%, 헤미셀룰로스 20.5%, 리그닌 25.3%, 회분 14.6%로 나타났는데, 억새 등 초본계 바이오매스와 비교하여 특이하게 높은 성분은 회분으로 이는 벼에 대한 규산질 비료의 시용에서 기인한 것이다. 바이오매스 전처리에 많이 사용되는 암모니아, 희황산 용매와 규산염에 침식성을 가지는 가성소다 용매를 이용하여 각 용매별 단독 및 알칼리-산 복합 처리 하였을 때 효소 가수분해 효율, 고상시료 성분변화 등을 상호 비교하였다. 예비실험을 통하여 암모니아 처리조건은 15%(w/w) 150?C 20분, 가성소다 처리조건은 1.5%(w/w) 150?C 20분, 희황산 처리조건은 1.0%(w/w) 150?C 10분으로 설정하였다. 암모니아 단독, 희황산 단독, 암모니아-희황산 복합 처리 시료의 효소 가수분해 효율은 각각 37.8%, 39.1%, 42.8%로 약 40%선에서 큰 차이가 없었다. 반면 가성소다 단독, 가성소다-희황산 복합 처리시료의 효소 가수분해 효율은 각각 62.7%, 82.8%로 나타나 앞선 3가지 처리방법 대비 50%, 100%에 가까운 효소 가수분해 효율 향상을 보였다. 이 때 전처리 고상시료의 성분 변화를 살펴보면 회분 함량에서 큰 차이를 보였는데 암모니아 단독, 가성소다 단독, 희황산 단독, 암모니아-희황산 복합, 가성소다-희황산 복합 처리에서 각각 47.8%, 77.1%, 43.5%, 55.8%, 94.7%의 회분 성분 기각률(rejection rate)을 나타냈다. 이는 왕겨 효소 가수분해 효율의 최대 저해요인이 회분임을 추정할 수 있다. 왕겨 전처리 알칼리 용매는 암모니아보다 가성소다가 더 효과적이었고 희황산 복합 처리시 그 효과가 크게 상승하였다. 따라서 규산염(회분) 함량이 높은 바이오매스는 고온 고압 조건에서 가성소다 용액으로 처리한 후 그 고상분을 희황산 용액으로 복합 처리하는 시스템이 효소 당화 증진에 매우 유리함을 확인하였다.
경내경정맥 간내문맥간정맥 단락술에 의한 식도정맥류 출혈의 치료 효과
탁원영(Won Young Tak),이양일(Yang Il Lee),최성곤(Seng Gon Choi),권중구(Joong Gu Kwen),이창형(Chang Hyung Lee),윤영미(Young Mee Youn),안병철(Byeong Cheol Ahn),곽규식(Kyu Sik Kwak),최용환(Yong Hwan Choi),정준모(Joon Mo Chung),김용주(Yo 대한내과학회 1994 대한내과학회지 Vol.46 No.1
Objectives: This study was performed to examine the effectiveness and prognostic factors of the transjugular intrahepatic portosystemic stent shunt (TIFSS) for the treatment of variceal bleeding secondary to portal hypertension. Methods: Between October 1991 and February 1993, TIPSS was performed in 21cirrhotic patients with variceal hemorrhage in Kyungpook National University Hospital. We reviewed the medical records and compare the portal pressure, portohepatic pressure gradient (PHG) and the endoscopic findings before and after TIPSS. Mean (+SD) follow up period was 7.0±3.9 months. Results: The mean portal pressure prior to TIPSS was 29.2mmHg and dropped to 19.9mmHg(p<0.001), and mean PHG from 21.9mmHg to 11.9mmHg(p<0.001) after shunt establishment. Variceal decompression after TIPSS was identified by early (within 10days) follow up endoscopy in 14 of 16cases, and late (3months after) in 4 of 5cases. Hepatic encephalopathy was recorded in 9patients. However, only 4patients developed recurrent encephalopathy. Recurrent hepatic encephalopathy cases showed significant decrease of mean PHG (14.5mmHg) than transient (7.4mmHg) and without (9.6mmHg) encephalopathy cases (p<0 05). Child-Pugh class C was important factor in the development of recurrent hepatic encephalopathy. Five patients died during the follow up period, 1 month mortality rate was 4.8%, And overall 6month survival rate was 80%, but only 50% in case of Child-Pugh class C. Conclusion: These results suggest that TIPSS is an effective method of portal decompression for the treatment of variceal bleeding and the most important prognostic factors are preprocedual hepatic reserve and decrease of PHG.
1970 년 대구 지방에 유행한 Cholera 환자의 임상적 및 회복기 배균 상태에 관한 관찰
이상계 ( Sang Kay Lee ),김만재 ( Man Jae Kim ),최용환 ( Youn Hwan Choi ),문종웅 ( Chong Woong Moon ) 대한내과학회 1973 대한내과학회지 Vol.16 No.10
A clinical observation was made on 16 cases of male and 45 cases of female on whom cholera was suspected clinically during the epidemic of 1970 in Daegu area. The morbidity was higher among those whose living standard was low and were living outskirts of t