Hepatic Cirrhosis Occurring in a Young Woodchuck(Marmota monax) Due to Vertical Transmission of Woodchuck Hepatitis Virus(WHV)

Kyu-shik Jeong,정원일,Jae-yong Chung,Mi-young An,Chae-yong Jung,Gyoung-jae Lee,Jong-soo Kang,Byeong-cheol Kang,Young-heun Jee,Bruce H Williams,Young-oh Kwon,Da-hee Jeong 대한수의학회 2003 Journal of Veterinary Science Vol.4 No.2

Cirrhosis Occurring in a Young Woodchuck (Marmota monax) Due to Vertical Transmission of Woodchuck Hepatitis Virus (WHV)Da-hee Jeong, Won-il Jeong, Jae-yong Chung, Mi-young An, Chae-yong Jung, Gyoung-jae Lee1, Jong-soo Kang1, Byeong-cheol Kang2, Young-heun Jee3, Bruce H Williams4, Young-oh Kwon5 and Kyu-shik Jeong*College of Veterinary Medicine, Kyungpook National University, Daegu 702-701, Korea1Shinwon Scientific Co., LTD, Research Institute, Suwon, Korea2Clinical Research Institute, Seoul National University, Seoul 110-744, Korea3College of Veterinary Medicine, Jeju National University, Jeju 690-756, Korea

Polystyrene composites containing crosslinked polystyrene-multiwalled carbon nanotube balls

Kwon, Soon-Min,Kim, Hun-Sik,Kim, Don-Young,Yun, Young Soo,Jin, Hyoung-Joon Wiley Subscription Services, Inc., A Wiley Company 2008 Journal of applied polymer science Vol.110 No.6

<P>Crosslinked polystyrene-multiwalled carbon nanotube (PS-MWCNT) balls, which act as conductive microfillers, were prepared by the in situ suspension polymerization of styrene with MWCNTs and divinyl benzene (DVB) as a crosslinking agent. The diameters of the synthesized crosslinked PS-MWCNT balls ranged from 10 to 100 μm and their electrical conductivity was about 7.7 × 10<SUP>−3</SUP> S/cm. The morphology of the crosslinked PS-MWCNT balls was observed by scanning electron microscopy and transmission electron microscopy. The change in the chemical structure of the MWCNTs was confirmed by Raman spectroscopy and Fourier transform infrared spectroscopy. The mechanical and electrical properties of the PS/crosslinked PS-MWCNT ball composites were investigated. It was found that the tensile strength, ultimate strain, Young's modulus, and impact strength of the PS matrix were enhanced by the incorporation of the crosslinked PS-MWCNT balls. In addition, the mechanical properties of the PS/crosslinked PS-MWCNT ball composites were better than those of the PS/pristine MWCNT composites. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008</P>

Decoding the Modern Fantasy of `White People, Korean` : An Analysis of Images from `the King Young-jo & Jung-jo` to `the open port era`

Min, Soo hong,Kwon, Young Gull 한국색채학회 2006 한국색채학회 학술대회 Vol.2006 No.1

취학전 아동의 체력 실태와 평가

권영옥,김동권,민춘기,이용인,전종귀,진윤수,홍성표 忠南大學校體育科學硏究所 1995 體育科學硏究誌 Vol.13 No.1

The purpose of this study was analyze children's Physical Fitness and basic rate by observing the change in the heart rate of the 1230 children of five of six years of age. Following conclusions were obtained The muscular strength was relatively low according to places. And the muscular strength of boys was higher than that of girls. The flexibility of girls was higher than that of boys according to places and sexes. The muscular endurance, power, balance and agility of boys were higher than those of girls according to places and sexes. Thus the development of physical fitness was improved with their ages, the physical fitness for physique seemed rather low. So the programs of physical plays for children's physical fitness ought to be developed and physical play showed to be done at kindergarten school.

소득작물 전후작지 적응 극단기성 벼 ‘중모 1032’

손영보,이종희,조준현,이지윤,오성환,송유천,박동수,박노봉,김상열,여운상,남민희,권영업 忠北大學校 農業科學硏究所 2015 農業科學硏究 Vol.31 No.2

대학생들의 물리 개념 오인에 관한 연구

권재술,안수영 한국교원대학교 과학교육연구소 1991 청람과학교육연구논총 Vol.1 No.1

본 연구는 대학생들이 지니고 있는 전류에 관한 오인의 유형을 조사하고, 사실의 관찰 후에 나타난 유형의 변화를 알아보는데 그 목적이 있다. 연구의 방법으로는 학생들이 사실의 관찰 후에 그들의 개념을 어떻게 변화시키는가를 알기위하여 POE(예측, 관찰, 설명) 방법을 이용하였다. 전류에 관한 오인의 유형은 단일극 모형, 충돌모형, 소모성 모형, 분배모형, 순차적 흐름모형, 일정전류 모형으로 나눠볼 수 있다. 연구결과 이들 중 소모성 모형, 순차적 흐름모형, 일정전류 모형은 많은 학생들에게 나타났다. 관찰 전에 나타났던 대부분의 오인의 유형은 관찰 후에 과학자적 개념으로 또는 다른 모형으로 전환되었으나, 소모성을 알 수 있었다. 이처럼 많은 대학생들이 중ㆍ고등학생과 마찬가지로 전류에 관하여 유사한 오인의 유형을 지니고 있었으며, 특히 이러한 오인은 주어진 문제상황에 크게 영향받고 있었다. The study focused to find out the types of misconceptions on electric current and their changes by the observation of the facts falsifying their beliefs. The method used in this study was Prodiction-Observation-Explanation (POE) technique. This method was adopted to observe how students change their conceptions by observation of facts. The identified types, those were called student's model, were unipolar model, clashing model, consumption model, distribution model, battery as constant current source model, and sequential flow model. Among those, consumption model, sequential model, and battery as constant current source model were-frequently observed. Student's concetpions on electric current were changed according to their observation. Battery as constant current source model was appeared before observation. However, it was changed other models such as consumption. In contrary, consumption model, if it were appeared in prediction stage, did not changed very much after observing the phenomenon. In this study the consumption model seemed to be most persistent model. The study concluded that considerable percentage of college students also possess the similar misconceptions that appears in lower school level such as middle schools and high schools. The misconceptions were strongly influenced by problem context.

세기변조방사선치료의 선량분포 검증에 관한 연구

권수일,신동호,송재영,안진호 京機大學校 2006 論文集 Vol.50 No.-

Film dosimetry as a part of patient specific intensity modulated radiation therapy quality assurance (IMRT QA) has been accomplished to develop the new optimization method of film isocenter offset and to suggest the new quantitative criteria for film doimetry after optimization. Five patients with head and neck cancers were measured in IMRT dosimetry by film method. Optimization method with the local minimum was developed to adjust the film isocenter offset error, which is the biggest part of systemic errors. The mean ratios were 5.33% and 7.09% for 5mm and 1 mm resolution dose data optimization respectively.

수정진동자에 의한 Langmuir-Blodgett(LB) 누적막의 평가

권영수,장상목,김기완 경북대학교 센서기술연구소 1991 센서技術學術大會論文集 Vol.2 No.1

AT-cut quartz crystals and SAW devices were applied as immunosensors and chemical vapour sensors coated with PG, PI, PE, PS and lipid A were useful for determine of amylacetate, acetoin, menthone and other organic vapours, which showed different affinities for each lipid. We conducted that the key problems of our sensor system for practical application are life time and reproducibility from our results. The most important points are chemical instability of natural lipid materials and randomness of coating method. In this paper, we combined an artificial lipid with a piezoelectric crystal in order to improve stability of our sensor. LB technique was applied to produce uniform lipid layers on the crystals. Relationships between frequency change and number of LB layers are also discussed.

Cyclodextrin Glucanotransferase와 Cyclodextrinase를 생산하는 Bacillus 속 세균의 분리와 그 효소들의 특성

권현주,남수완,김광현,곽영규,김병우 동의대학교 기초과학연구소 1997 基礎科學硏究論文集 Vol.7 No.1

A bacterium producing Cyclodextrin Glucanotransferase (CGTase) and Cyclodextrinase (CDase) was isolated from soil, and named as Bacillus stearothermophilus KJ16 . The growth of the isolated strain occurred in two steps, and syntheses of CGTase and CDase were dependent on the growth cycle of the cell. CGTase was constitutively synthesized during the 1st growing phase. while CDase was synthesized inducibly during the 2nd growing phase. When the medium pH was controlled at 7.0, the maximun enzyme activities of CGTase and CDase were increased by 12-fold (1300 mU/ml) and 2-fold (225 mU/ml), respectively, compared with the pH-uncontrolled batch culture. The CGTase of the isolate converted soluble starch to CDs with the ratio of α-CD:β-CD:γ-CD=42:46:12 at 55℃. The optimal pH and temperature of CGTase were 6.0 and 60℃,respectively and the optimal pH and temperature of CDase were 6.0 and 55℃. The molecular weights of the purified CGTase and CDase were estimated to be 65,000 and 68,000 dalton, respectively, Among serveral substrates, γ-CD was most rapidly hydrolyzed by the purified CDase.

Cyclodextrin Glucanotransferase와 Cyclodextrinase를 생산하는 Bacillus 속 세균의 분리와 그 효소들의 특성

권현주,남수완,김광현,곽영규,김병우 한국미생물생명공학회 ( 구 한국산업미생물학회 ) 1996 한국미생물·생명공학회지 Vol.24 No.3

토양으로부터 CGTase와 CDase를 함께 분비·생산하는 내열성 세균을 분리하였으며, 동정결과 Bacillus stearothermophilus로 판명되어 KJ16으로 명명하였다. Bacillus stearothermophilus KJ16 균주는 회분배양할 경우 2단계 성장을 하며 일차증식기에 CGTase를 생산하고 이차증식기에 CDase를 생산하는 양상을 보였다. 배치 pH를 7.0으로 조절하면서 배양할 경우, CGTase는 균의 증식에 따라 증가하고 CDase는 CGTase보다 뒤에 생산되었다. 그 생산양은 pH 비조절 배양에 비해 CGTase는 최대 12배(1300 mU/ml)까지, CDase는 2배(225 mU/ml)정도 증가되었다. 분리균주가 생산하는 CGTase는 분자량이 65,000 dalton으로 pH 6.0, 60℃에서 최적활성을 보이며 HPLC 분석을 통해 α-, β-, γ-CD를 42: 46: 12의 비율로 생산하는 α/β 혼합형 CGTase였다. 또한 CDase는 분자량이 68,000 dalton으로 pH 6.0, 55℃에서 최적활성을 보이며 최적기질은 γ-CD였다. A bacterium named as Bacillus stearothermophilus KJ16. The growth of the isolated strain occurred in two steps, and syntheses of CGTase and CDase were dependent on the growth cycle of the cell. CGTase was constitutively synthesized during the 1st growing phase, while CDase was synthesized inducibly during the 2nd growing phase. When the medium pH was controlled at 7.0, the maximun enzyme activities of CGTase and CDase were increased by 12-fold(1300 mU/ml) and 2-fold (225 mU/ml), respectively, compared with the pH-uncontrolled batch culture. The CGTase of the isolate converted soluble starch to CDs with the ratio of α-CD: β-CD: γ-CD=42:46:12 at 55℃. The optimal pH and temperature of CGTase were 6.0 and 60℃, respectively and the optimal pH and temperature of CDase were 6.0 and 55℃. The molecular weights of the purified CGTase and CDase were estimated to be 65,000 and 68,000 dalton, respectively. Among serveral substrates, γ-CD was most rapidly hydrolyzed by the purified CDase.