제한효소 DNA 분석법에 의한 국내분리 렙토스피라균의 동정

장우현, 김석용, 서정선 忠北大學校 遺傳工學硏究所 1988 遺傳工學硏究 Vol.2 No.1

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5㎜ 단일 부분 절개를 통한 이중 안검 성형술 : Single 5 mm-Partial Incision Method

유현석,금인섭,민경원 大韓成形外科學會 2002 Archives of Plastic Surgery Vol.29 No.6

구성주의 프로그램에서의 수교육 활동에 관한 연구

강숙현,이석순 광주보건대학 1989 論文集 Vol.14 No.-

The purpose of this study was to search the philosophical, theoretical back-grounds and practices in the Number Activities of the Constructivist Early Childhood Education Program. In order to achieve this purpose, following questions of study was given. 1. What are the philosophical, theoretical backgrounds in the Constructivist Program ? 2. What are the contents and unfolding methods i n the Constructivist Program ? 3. How emphasize the motives for number activities ? 4. How are the child's grouping in the number activities 5. How compose the social environment in the Consructivist Program ? 6. What are the teacher's role and teaching strategies To summarize, the philosophical, theoretical backgrounds ; contents ; unfolding methods ; motivation ; grouping of children ; and the teacher's role and teaching strategies of Constructivist Early Childhood Program, present study referring the books, dissertations. program brochures and seminar informations about the Constructivism. The conclusions of this study are as follows ; 1. In the philosophical, theoretical backgrounds, Constructructivist progam is based on Piaget's cognitive-developmental theory. It was developed by Constance Kamii and Rheta DeVries in 1967. 2 The aims of the Number Activities of Constructivist are 'DEVELOPMENT" and "INTELLECTUAL AUTONOMY".. Constructivist includes activities through the everyday life and group games. Therefore the Constructivist program need not special materials. But situations within everyday life and are emphasized so as to develop to construct number's structure and relationships. 3. The Number Activities of Constructivist Early Childhood Education Program emphasize children's interest and motivation. Children's interest become the motives for spontaneous activities . 4. Children are grouped by themselves because Constructivist program emphasize children's interest and spontaneous participation. 5. In Constructivist program, the social environment are emphasized inter-action. Active interaction involves the conflict and the cooperation. 6. Constructivist teachter observes and takes part in play activities, and stimulus children's intellectual thinking. And the teacher arranges the educational environments, mainly use indirect method, i.e. children's everyday life and group games in practical teaching-learning situation.

면역억제제를 사용치 않은 동소성 간이식 실험견의 조직병리소견

조원현,최순옥,김인호,임태진,김성수,박준희,김우석,김현철,최규택,김진모,권건영 大韓移植學會 1994 Korean Journal of Transplantation Vol.8 No.1

벼의 혹명나방의 성 유인 물질의 합성과 생물활성시험

강석구,박정민,이정운,고현관 成均館大學校 科學技術硏究所 1983 論文集 Vol.34 No.2

벼의 혹명나방의 성 유인 물질인 (Z)-13-옥타데센-1-올 아세테이트를 새로운 방법으로 합성하였다. 즉, 1-헥신의 리튬 음이온을 보호된 12-브로모-1-도데칸을 THP 에테르와 반응시켜, 13-옥타데신-1-올 THP에테르를 만든후 Lindlar 촉매에 의한 수소화 반응을 시켜 (Z)-13-옥타데센-1-올 THP에테르를 얻는다. 산촉매하에서 보호기를 제거한 후 피리딘 용매하에서 무수아세트산을 반응시켜 최종 생성물인 (Z)-13-옥타데센-1-올 아세테이트를 좋은 수율로 얻었다. 농촌진흥청의 곤충과와 공동으로 상기에서 합성된 성 유인 물질을 이용하여 혹명 나방의 숫컷에 대한 성 유인 효과를 실험해본 결과 성 유인 작용이 있는 것으로 나타났다. A new method is described for the synthesis of (Z)-13-octadecen-1-ol acetate(1), the sex pheromone of the Rice Leaf Folder moth. Lithium acetylide of 1-hexyne was alkylated with 12-bromo-1-dodecanol THP ether. 13-Octadecyn-1-ol THP ether was stereoselectively reduced over Lindlar catalyst(Pd/BaSO_4) to give (Z)-13-octadecen-1-ol THP ether. (Z)-13-octadecen-1-ol THP ether was deprotected and acetylated with acetic anhydride and pyridine to afford the final product, (Z)-13-octadecen-1-ol acetate. Biological activity test of the synthetic compound, (Z)-13-octadecen-1-ol acetate was tested in the field using polyethylene capsules as containers. The numbers of moths trapped with pheromone vials were counted.

말초동맥질환에 있어서 혈장 호모시스테인 농도의 의미

최동현,이상목,고석환,홍성화,오수명,윤충,박호철 대한혈관외과학회 2004 Vascular Specialist International Vol.20 No.1

L-라이신 발효에 있어서 당밀전처리의 영향

신현철,김성준,성진석,전영중,이재흥 한국미생물생명공학회 ( 구 한국산업미생물학회 ) 1996 한국미생물·생명공학회지 Vol.24 No.3

Can molasses, the most widely used carbon source for the industrial fermentation of L-lysine, usually contains a high concentration of calcium ions which tend to cause scaling problem in the recovery process. To remove the calcium ions, cane molasses was pretreated with sulfuric acid by adjusting the pH to 2.5~3.5. When the pretreated solution was directly heat-sterilized and used in the fermentation, a significant reduction in L-lysine production was observed. In this paper, we proved that sucrose is a superior substrate for L-lysine fermentation of that of glucose or fructose and that the above-mentioned decrease of L-lysine production was caused by the hydrolysis of sucrose in the molasses when the molasses was heat-sterilized at a low pH. The problem was overcome by adjusting the pH of molasses to neutral before sterilization.

Co-60 감마선의 조사선량 측정

하석호,김현문 대한방사선 방어학회 1991 방사선방어학회지 Vol.16 No.2

감마선 조사선량의 국가표준을 확립하기 위하여 Co-60 감마선에 대한 조사선량을 절대측정을 수행하였고 그 값이 갖는 오차한계를 분석 평가하였다. 측정기로는 고순도 흑연으로 제작된 원통형 이온전리함을 사용하였고 이온화 전류 측정은 vibrating reed 증폭기를 사용한 전하모드법에 의해 수행되었으며 관련 물리상수 및 각종 관련 보정인자를 평가하여 이온화 전류 측정값으로부터 조사선량률을 결정하였다. Measurement of Co-60 gamma rays has been made for establishment of exposure standard and analyze it's overall uncertainties. Exposure rate determined by the charge mode method using vibrating reed amplifier with cylinderical type cavity chamber. The values of a variety of physical constants and the correction factors are evaluated. The resulting exposure rate is 690.81 R/h at the distance of 1 m from the source and the related uncertainties is ±0.8%.

충남 금산 지역주민에서 B형간염 표면항체(HBsAb) 발현빈도에 관한 연구

신현성,서희숙,이민웅 대한임상병리사협회 1993 대한임상병리사회지 Vol.25 No.1

기계연마에 기인한 Pd(100)의 표면 지형에 대한 AFM 분석

박현주,정경한,추명석,진원배 동아대학교 기초과학연구소 2001 基礎科學硏究論文集 Vol.18 No.1

기계 연마에 기인하는 Pd(100) 표면의 지형 및 연마과정 중에 행해지는 표면 세척방법에 따라 표면 거칠기에 미치는 영향을 AFM으로 조사하였다. 연마 입자의 크기별로 순차적으로 3, 1, 0.1, 0.04 ㎛의 입자로 연마를 수행하였다. 연마의 매 단계마다 시료 표면에 남아있는 연마제를 제거하기 위하여 시료 표면을 단순히 흐르는 물로 세척하는 경우와, 흐르는 물에서 솜으로 세척하는 경우의 표면 거칠기를 비교한 결과, 제곱평균 제곱근에 의한 표면 거칠기는 5×5 ㎛2의 주사영역에서 평균적으로 각각 1.61, 1.08, 0.82 nm 정도의 차이로, 후자의 경우가 훨씬 효과적임을 보여주었다. 이러한 사실로부터 단순히 흐르는 물에 의한 세척으로는 연마의 전 단계에서 사용된 연마 입자들이 표면상에서 완전히 제거되지 않고 다음 단계의 연마 결과에 영향을 미친다는 것을 알 수 있었다. 또한 연마과정 중 bulk로부터 빠져 나온 것으로 보이는 알갱이들이 연마입자에 의해서 발생하는 스크래치의 가장자리를 따라 흡착되어 있는 것이 관측되었다. The effect of surface cleaning performed at every step of mechanical polishing process on surface roughness was investigated with AFM surface topography. Diamond suspensions with grain sizes of 3, 1, 0.1 ㎛ and colloidal silica of 0.04 ㎛ for final polishing were used as abrasive in turn. When the specimen was cleaned with only flowing water at each polishing step, some part of particles remained on the specimen after cleaning. These remaining particles gave rise to relatively pronounced scratches on the surface during the subsequent polishing step, In the other hand, in the case cleaned with a soft wool in flowing water, it was showed that the remaining particles were removed almost all. The lower degree of rms-surface roughness in the latter case compared to that of the former case was obtained, as the differences of rms-surface roughness between both cases were on an average 1.6 nm,1.1 nm, and 0.8nm, respectively, for an area of 5×5 ㎛2 after polishing with 1, 0.1, and 0.04㎛ grain size. In addition, it was found that particles are deposited at the edges of the scratches, which are probably Pd particles removed by the mechanical polishing.