http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Sung-Won Choi,Nam-Yun Her,Dong-Seob Kim,Sun-Jin Choi,Han-Seung Lee,Hak-Jong Choi,Ju-Hyun Yu 한국식품영양과학회 1997 Preventive Nutrition and Food Science Vol.2 No.2
CMCase produced by recombinant E. coli JM109(pCEH#4) containing CMCase gene from Cellulomonas sp. YE-5 was purified to 24.3 fold and 2.6% yield by ammonium sulfate precipitation, DEAE-cellulose column chromatography and gel filtration on Sephadex G-100. The optimum pH and temperature for CMCase activity were pH 7.0 and 50℃. The enzyme was stable between pH 5.0 and 10.0, and up to 60℃. The molecular weight of the enzyme was estimated to be approximately 40,000 daltons by SDS-PAGE. Analysis of the amino acid composition showed that the enzyme contained many glycines and acidic amino acids. The enzyme was an endo-type CMCase and the final enzyme reaction product from hydrolysis of CM-cellulose by the enzyme was cellobiose. K_M value determined with CM-cellulose was 1.28mM.
How useful are liver function tests in vitro in human hepatoma cell line (HepG2)?
Byung-Suk Jeon,Seong-Yun Hwang,So-Ryeon Hwang,Nam-Ju Kim,Hee Yi,Ji-Hyun Bang,Moon Her,Hyun-Ok Ku 한국실험동물학회 2021 한국실험동물학회 학술발표대회 논문집 Vol.2021 No.7
In preclinical hepatotoxicity testing cell based are frequently relevant. However, prediction of drug induced liver injury remains a major challenge. Here we addressed the usefulness of frequently relevant markers of hepatocellular injury in human hepatocarcinoma cell line (HepG2) in response to treatment with either acetaminophen, amiodarone, etoposide, orphenadrine and/or lovastatin. The change in the cellular injury (AST, ALT and LDH) were determined toxicity and above drug concentrations as to evaluate the utility of these markers in vitro systems. Initially, treatment of HepG2 with any of the drugs caused a statistically significant reduction in enzyme activities to suggest a switch from basic amino acid metabolism towards induced detoxification. However, treatment for prolonged periods of time caused cytolysis, as evidenced by the significant rise in extracellular LDH and the concomitant increase in ALT and AST activity. Notably, among the various endpoints studied, LDH was best to determined dose dependent cytotoxicity, while other markers of hepatocellular injury were variable. Taken collectively, LDH measurement proofed to be robust in predicting hepatocellular toxicity; therefore, it should be included in preclinical testing strategies for an improved prediction of hepatotoxicity.
ManBIF: a Program for Mining and Managing Biobank Impact Factor Data
Yu, Ki-Jin,Nam, Jung-Min,Her, Yun,Chu, Min-Seock,Seo, Hyung-Seok,Kim, Jun-Woo,Jeon, Jae-Pil,Park, Hye-Kyung,Park, Kie-Jung Korea Genome Organization 2011 Genomics & informatics Vol.9 No.1
Biobank Impact Factor (BIF), which is a very effective criterion to evaluate the activity of biobanks, can be estimated by the citation information of biobanks from scientific papers. We have developed a program, ManBIF, to investigate the citation information from PDF files in the literature. The program manages a dictionary for expressions to represent biobanks and their resources, mines the citation information by converting PDF files to text files and searching with a dictionary, and produces a statistical report file. It can be used as an important tool by biobanks.
Park, Sung-Won,Her, Nam-Yun,Kim, Dong-Seob,Park, Sun-Jin,Lee, Han-Seung,Park, Hak-Jong,Yu, Ju-Hyun The Korean Society of Food Science and Nutrition 1997 Preventive Nutrition and Food Science Vol.2 No.2
CMCase produced by recombinant E. coli JM109 (pCEH#4) containing CMCase gene from Cellulomonas sp. YE-5 was purified to 24.3 fold and 2.6% yield by ammoniumsulfate precipitation, DEAE-cellulose column chromatography and gel filtration on Sephadex G-100. The optimum pH and temperature for CMCase activity were pH 7.0 and 5$0^{\circ}C$. The enzyme was stable between pH 5.0 and 10.0, and up to 6$0^{\circ}C$. The molecular weight of he enzyme was estimated to be approximately 40,000 daltons by SDS-PAGE. Analysis of the amino acid composition showed that the enzyme contained many glycines and acidic amino acids. The enzyme was an endo-type CMCase and the final enzyme reaction product from hydrolysis of Cm-cellulose by the enzyme was cellobiose. {TEX}$K_{M}${/TEX} value determined with CM-cellulose was 1.28mM.
다양한 형태의 Pilot Scale 초음파 시스템 개발 및 나프탈렌 분해효율 검증
박종성(Jong Sung Park),이하윤(Ha Yun Lee),한종훈(Jong Hun Han),허남국(Nam Guk Her) 大韓環境工學會 2011 대한환경공학회지 Vol.33 No.4
초음파 기술은 공동현상(cavitation)에 의한 산화분해 및 열분해 과정을 이용해 오염물질을 저감시키는 활발한 연구가 진행되고 있으나 대부분 저용량·소규모(Lab scale) 실험에 그치고 있다. 본 연구에서는 대용량·연속식 처리가 가능한 Pilot Scale의 초음파 시스템을 개발하고, 분해 대상물질로 나프탈렌을 선정하여 개발된 시스템의 처리효율을 비교·검증하였다. 전반사가 유도된 최적의 다주파 조사 조건으로 V-120° 형태가 일반형에 비해 약 1.4~2.2배 우수한 효율을 나타내었다. V-120° 초음파 조사 형태, 연속식 처리가 가능하기 위한 유입·유출수 설치, 보조제 첨가부 및 외곽 냉각 순환시스템을 적용하여 총 3가지 형태의 pilot scale(20~40 L) 반응조를 제작하였다. 세 반응조의 나프탈렌 처리 결과는 모두 EPA의 나프탈렌 음용수 권고기준을 만족하였으며, 특히, 전반사 조건이 유도된 PS1과 PS2 type이 약 97% 이상의 우수한 분해효율을 보였다. 연속식(CSTR형) 처리 방식에서도 2.5~10 mg/L의 나프탈렌을 시간당 10~20 L를 처리한 결과 약 84~96%의 우수한 분해효율을 나타내었다. 인공·현장 지하수 조건에서의 초음파 적용시 초음파 효율의 큰 차이를 보이지 않아 개발된 본 시스템의 현장 적용 가능성을 확인하였다. Recently, researches that a variety of contaminants in water are removed by sonolysis technology with oxidation and pyrolysis process from cavitation were conducted. However, there are few studies for sonochemical treatment by a pilot-scale ultrasound system. This research focused on developing pilot-scale ultrasound systems, which could be an continuously effective treatment for a large volumes of contaminants, and demonstrating the feasibility of utilizing these systems to remove naphthalene from groundwater. V-120 type reactor was found to be 1.4~2.2 times higher effective than the normal type. A total of three different pilot scale`s systems consisted of installing effluent and irrigation water in order to be a continuos system, including supplemental additives, and applying a V-120 type reactor and a external cooling cycle system. Naphthalene levels treated by three systems were lower than a recommended guideline of naphthalene for drinking water in EPA. Especially, the naphthalene removal efficiencies of PS1 and PS2 systems were over 97%. The pilot-scale continuous ultrasound clean-up system delivered over 84~95% naphthalene removal efficiency for treatment of 10~20 liter of groundwater. In addition, the ultrasound system could be successfully applied to the conditions of artificial and genuine groundwater contaminated with naphthalene.
BLDC 모터 제어를 위한 PWM 분석과 전류리플 최소화
오태석(Tae-Seok Oh),신윤수(Yun-Su Shin),허남억(Nam-Euk Her),김일환(Il-Hwan Kim) 대한전기학회 2008 정보 및 제어 심포지엄 논문집 Vol.2008 No.1
사다리꼴 역기전역을 갖는 BLOC 전동기 제어는 구형파 전류를 인가함으로서 DC 모터와 같은 제어를 할 수 있어 많은 용용 분야에 사용되고 있다. 구형파 전류를 인가하기 위하여 연구된 PWM 방식을 분석해 보면 몇 가지 문제점을 가지고 있다. 기존의 연구내용으로는 유니폴라 PWM방법, 바이폴라 PWM 방법, 하이브리드 PWM 방법이 있으나 PWM을 정확히 분석해보면 원하는 전압을 인가할 수 없는 부분이 있음을 알 수 있다. 특히 방향을 바꾸는 시점이나 속도를 급격히 줄이는 부분에서는 원하는 전압이 인가되지 않음을 알 수 있다. 본 논문에서는 이러한 문제점을 분석하고 정확한 전압이 인가될 수 있는 방업을 제안한다.