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

Langmuir-Blodgett막 MIM소자의 전도 특성

권영수,유승엽 東亞大學校 附設 情報通信硏究所 1997 情報通信硏究所論文誌 Vol.5 No.1

Langmuir-Blodgett (LB) method have been used by many researcher because of its facility to control the thickness of film as molecular order and orientation of molecular. We fabricated MIM device using maleate copolymer LB films(2C??MA-VA-VE₂) and electrical conduction mechanism in ultra-thin LB film were investigated. In our experimental results, the maleate copolymer LB film have the property of insulator like organic ultra-thin film. Its dielectric constant were about 4.0∼6.0 by I-V measurement and frequency-capacitance measurement. Schottky current was appeared as electrical conduction current and Schottky barrier was about 0.9[eV]

여학생 동복 하의 착용시의 생리반응과 주관적 착용감

권수애,오미경,강미영,송혜원,박진채,권리현 충북대학교 교육 ·생활연구소 생활과학연구센터 2002 생활과학연구논총 Vol.5 No.-

In this study, physiological responses and subjective sensations were investigated depending on various high school girls' lower cloth uniform in winter. Four healthy young women were selected, and they wore same underwear and jacket. The types of lower cloth were tight skirt+stocking, flared skirt+stocking, tight skirt+legings+socks, flared skirt+legings+socks, and slacks+socks. The results were as follows: 1) The effect of the type of lower cloth in winter on the skin temperature, humidity inside clothing and subjective sensations were significant. 2) It is desirable for high school girls to wear slacks in winter, Since physiological responses and subjective sensations of slacks are superior to those of skirts. 3) It is desirable for high school girls to wear flared skirt, legings, socks in winter, Since insulation and subjective sensations of flared skirts are superior to those of tight skirts.

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.

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.

分散 데이타베이스의 效率的인 質疑語의 처리

權寧淡,金重秀,金正洪 嶺南大學校附設 基礎科學硏究所 1988 基礎科學硏究 Vol.8 No.-

The efficient query processing is of im,portance ina distributed database management system. For a class of simple queries, it is possible to design optimization algorithm that will derive optimal distribution strategies. In this paper, a query <Extentended Simple Query> that is extension of simple query is defined. It is not necessary to reduce data transmission cost and to fully eliminate relations in a result site. Efficient algorithm for ESQ that considers semijonin operation sequences is presented.

미디어교육을 위한 웹기반 학습환경 프로토타입 개발

권성호,신영수 한국교육정보미디어학회 2003 교육정보미디어연구 Vol.9 No.3

본 연구는 웹에서 미디어교육을 실시하기 위하여 미디어교육을 위한 웹기반 학습환경의 프로토타입을 개발하는 것이다. 웹 기반 미디어교육의 설계를 위하여 구성주의 인식론을 바탕으로 문제 해결 과정을 중시하는 탐구기반학습을 교수-학습의 원리로 하여 미디어교육을 위한 웹기반 학습환경의 프로토타입을 개발하였다. 문헌연구를 통하여 개발의 이론적 근거를 살피고, 설계 원리와 전략, 구성요소를 도출하여 프로토타입을 개발하였다. 개발한 프로토타입은 미디어 제작과 분석이 탐구를 기반으로 유기적으로 연결되어 미디어 개념을 이해하도록 하였다. 제작에 대한 직접적 경험과 성찰, 전문가 모델링을 이용한 성찰로 지속적인 사고를 하는 탐구순환과, 협력활동과 개별지식구성이 이어지면서 지식 구축을 할 수 있도록 하였다. 또한 웹에서의 다양한 자원들을 이용하면서 활동을 위한 비지시적 안내를 통해 학습자들이 주체적으로 미디어를 사용하고 다양한 시각을 접하면서 비판적이고 창의적인 사고를 할 수 있도록 하였다. 이 프로토타입은 앞으로 웹기반 미디어교육 프로그램의 개발과 활용에 기반이 될 것으로 기대된다. The purpose of this study is to develop a prototype of Web-Based Learning Environment(WBLE) for media education. The necessity of media education is increasing in the knowledge-information society where learners' abilities to use media is strongly demanded. Media education is to develop media literacy, which means that learners can evaluate information obtained from media in a critical mind and communicate and express their ideas in creative ways. In the media environment changing with the development of information technologies, media education must be designed in consideration of the internet space so that learners can actively participate in learning. Changes in media environment and people's expectation for educational effects result in high demands for Web-based media education. Considering its characteristics, media education needs to be approached from the position of constructivism. Seeing from the position, it is necessary to design learning environment that provides learners with learning materials and tools so that they can study by themselves what they want to learn. The Web has potential by nature for realizing learning environment fit for constructivism. Accordingly, this study attempted to develop a prototype of WBLE for media education, taking inquiry-based learning on the basis of constructive epistemology as the learning principle in designing WBLE for media education. The design principles of WBLE on the basis of inquiry-based learning promote learning activities, which are inquiries and reflections on direct experiences, and support collaborative learning and individual knowledge construction. Finally, learners are guided in resource utilization and learning activities, and given directions of learning. This study developed WBLE prototype for media education that determines and reflects design strategies in consistency with the design principles of WBLE according to the characteristics of media education and inquiry-based learning. The developed prototype of learning environment includes 'media room' containing elements related to learning activities, 'collaborative room' for collaborative learning, and 'my room' related to individual knowledge construction. Learners' asynchronous communication, learning materials and results, and resources and links in 'resource room' , which are managed in DB, provide diverse types of information to learners, and suggest the direction of learning through underlying guidance in 'information' and learning activities. In the developed learning environment, learners set topics for inquiry, collaborative to produce media expressing the topics, and manage learning process and schedule by themselves. They continue to reflect through expert modeling while acquiring information about how to produce media from 'media producing process' in 'media room' and analyzing existing media products in 'media inquiry' , and on the other hand, they engage in cyclic inquiry through practicing producing and exchanging influence and develop media literacy. This study proposed WBLE for media education, but it must be improved and complemented through continuous research in the future. First, there should be a plan to induce and motivate learners' active participation. Second, the operation, management and assessment of learning must be taken into account in the developed learning environment. Third, experimental research must be carried out by refining the prototype into an actual system

금융시장활성화를 위한 현안과 대책

권영준,박상수 경희대학교 사회과학대학 2000 社會 科學 論叢 Vol.18 No.-