Precurved Endosonic K-file에 의한 근관확대율 및 만곡도 변화에 대한 연구

양규호,허혜경,오원만 大韓齒科保存學會 1995 Restorative Dentistry & Endodontics Vol.20 No.1

단백질성 감염 임자로서 프리온

양선문,이원길 대한임상미샐물학회 2000 Annals of clinical microbiology Vol.3 No.2

토끼 태자에 형성시킨 구순열상의 치유과정에서 세포외기질 분포에 관한 연구

양원식,백승학 대한치과교정학회 1998 대한치과교정학회지 Vol.28 No.1

태아와 성체의 상처치유과정에서 다른 점으로는 태아 상처가 염증반응과 반흔조직의 생성이 없이 신속히 치유됨을 들수 있다. 태자상처의 비반흔성 치유와 세포외기질의 역할을 연관지어 해석하려는 노력이 진행중에 있으나, 각 실험 동물종간의 차이 및 세포외기질 구성요소의 다양성 등 많은 변수가 아직 미결의 과제로 남아 있다. 본 연구의 목적은 토끼 태자의 상처 치유과정에서 반흔조직의 형성과 관련이 있는 세포외 기질의 주요성분인 교원질 Ⅰ,Ⅲ,Ⅳ,Ⅴ형, fibronectin, laminin의 시기적 출현 및 분포양상을 조사하기 위한 것이다. 뉴질랜드산 흰 토끼를 임신 3기의 중반인 24일 째에 자궁절개술을 시행하고 태자에 인위적으로 구순열상을 만든 후, 봉합한 군(봉합군)과 봉합하지 않은 군(비봉합군), 정상대조군(sham operation group)으로 나누고 이들을 각각 수술 후 1,2,3,5,7일째에 희생시켜 상처치유에 대한 육안관찰 소견과 H&F염색소견 및 교원질Ⅰ,Ⅲ,Ⅳ,Ⅴ형, fibronectin, laminin의 면역조직화학적 염색 소견을 관찰하여 다음과 같은 결론을 얻었다. 1. 봉합군과 비봉합군에서 전기간동안 염증반응은 없었다. 2. 비봉합군의 재상피화가 봉합군에 비해 다소 느렸다. 3. 교원질 Ⅰ,Ⅲ,Ⅴ형은 봉합군과 비봉합군에서 2일군까지는 발견되지 않았고 3일군 이후 존재하였으나 염색정도가 인접정상조직이나 정상대조군에 비하여 증가하지 않았다. 4. 상피 기저막에서 교원질 Ⅳ형의 염색소견은 봉합군과 비봉합군에서 3일군이 다소 증가하였으나 그후 감소하여 인접정상조직이나 정상조직이나 정상대조군과 차이가 없었고, laminin의 염색소견은 봉합군과 비봉합군에서 5일군이후 발견되었고 염색정도의 증감없이 7일군까지 유지되었고 인접정상조직이나 정상대조군과 차이가 없었다. 5. 혈관내피세포 기저막에서 laminin과 교원질 Ⅳ형의 염색소견은 인접정상조직이나 정상대조군에 비해서 증가하지 않았다. 6. Fibronectin은 봉합군과 비봉합군에서 fibrin clot과 창상 기저부 및 창상연을 따라 3일군까지 염색소견이 증가하였다가 그후 감소하여 인접정상조직이나 정상대조군과 차이가 없었다. Adult wound healing is accompanied with inflammation and eventual scar formation, whereas fetal wounds heal rapidly by mesenchymal prpliferation without significant inflammatory cell participation and with minimal or no scar formation. The cellular mechanisms underlying these differing forms of wound healing are unknown but the extracellular matrix, through its effects on cell function, may play a key role. Therefore the purpose of this study is to investigate the spatial and temporal deposition of several component of extracellular matrix, which are known to be involved with scar formation, in the artificially created cleft lip wound healing of fetuses. The author had undergone hysterotomy and created cleft lip-like defects on fetuses of New Zealand White Rabbit in mid-third trimester(24 days). Fetuses were divided into the repaired group, the unrepaired group and the sham-operated control group. At 1,2,3,5,7 days after procedure, fetuses were obtained by Caeserean section. After documenting the viability of fetuses, they were photographed to compare size and facial morphology and sectioned for histological examination by H&E stain and spatial and temporal deposition of collagen typeⅠ,Ⅲ,Ⅳ,Ⅴand fibronectin, laminin by immunohistochemical method. The findings are summarized as follows 1. There were lack of inflammation in the repaired and the unrepaired group during experimental periods. 2. The reepithelialization of the unrepaired group was slower than that of the repaired group. 3. Collagen Ⅰ,Ⅲ,Ⅴ were found from post-op. third day. There were no difference of distribution in the control, the repaired and the unrepaired group. Collagen typesⅠ,Ⅲ,Ⅴ were present in all groups with restoration of the normal collagen pattern in the fetus. This implies that lack of scarring in fetal wounds is due to the difference of collagen organization pattern within wound and not simply lack of collagen formation. 4. Collagen Ⅳ was slightly increased at post-op. third day and decreased after post-op. fifth day. Eventually there were no difference in control, the repaired and the unrepaired group. Laminin was found at post-op. fifth day and maintained staining density until post-op. seventh day. There were no differences in the control, the repaired and the unrepaired group. According to staining of laminin and collagen typeⅣ in epithelial basement membrane, formation of epithelial basement membrane was not completed until reepithelialization was finished. 5. According to staining of laminin and collagen typeⅣ, there were no increase of neovascularity in the repaired and the unrepaired group. 6. Fibronectin was increased until post-op. third day at fibrin clot, wound base and margin and decreased after post-op. fifth day. Eventually, there were no differences in the control, the repaired and the unrepaired group. So it implies fibronectin plays a role as provisional matrix for fetal wound healing.

水素化된 非晶質 게르마늄의 特性調査(Ⅰ)

梁承勳,李原鎭,朴奉斗 慶北大學校 1985 論文集 Vol.39 No.-

Reactive thermal evaporation(RTE) was developed as a new method to deposit hydrogenated amorphous germanium films. RTE was carried out by the evaporation of high purity polycrystalline germanium in an atmosphere of hydrogen plasma produced by high voltage AC discharge of molecular hydrogen. Electrical conductivity and its annealing behavior, electron probe micro-analyzer and scanning electron microscopy were used to characterize the samples. Optimal conditions of sample preparation (from electronic point of view) were determined to be substrate temperature of 200℃ and hydrogen pressure of 1 Torr. Crucible type was proved to have an influence on the sample properties. The sample prepared at the optimum conditions shows the activated type conduction above room temperature.

수소화된 비정질 규소에서 바이어스에 의한 실리사이드 형성

梁承勳,金鐵河,李原鎭 慶北大學校 1990 論文集 Vol.49 No.-

We show that biased annealing of a-Si:H contacted with metal gives rise to silicide growth and the creation of metastable states that can be to some extent removed by unbiased annealing. This paper gives the first report of a direct correlation of Ⅰ-Ⅴ characteristics to silicide growth in a-Si: H. Variations of Ⅰ-Ⅴ characteristics with annealing biases are analysed by the two series-connected diodes model.

국내산 및 제초제 내성 콩(HS2906)의 일반성분, 무기질 및 지방산 조성

양윤형,이정희,김형진,윤원기,김환묵,김미리 동아시아식생활학회 2005 동아시아식생활학회지 Vol.15 No.1

Proximate analysis, mineral and fatty acid composition of three conventional domestic soybean cultivars and two imported ones including glyphosate-tolerant HS2906 were evaluated by AOAC method, ICP-AES and gas chromatography. There were several differences in the proximate analysis among three conventional domestic soybean cultivars ; higher crude fat in the cultivar Hwanggumkong, higher crude protein in Pungsankong, and higher carbohydrate and crude ash in Duyukong. The ranges of contents of proximate components of domestic cultivars were similar to the data previously reported. There were no significant differences in proximate analysis between conventional soybean WS82 and glyphosate-tolerant HS2906 ; 23.55~23.90% of crudefat, 34.22~35.55% of crude protein, 6.25~6.45% of crude ash, and 25.35~26.47% of carbohydrate. The mineral and fatty acid compositions of HS2906 were similar to those of conventional soybeans previously reported.

청신경종의 크기에 따른 어지러움의 양상 및 전정기능 검사의 특징

정원호,홍성화,조양선,김성민,장병찬,최재연,이승진 대한이비인후과학회 2000 대한이비인후과학회지 두경부외과학 Vol.43 No.1

Chomsky 언어학 이론의 배경

양우진 제주대학교 1971 논문집 Vol.3 No.-

The few modern studies of the history of linguistics have typically taken the position that "tout ce qui est anterieur au XIXe siecle, n etant pas encore de la linguistique, peut etre expedie en quelques lignes. in recent years, there has been a noticeable reawakening of interest in questions that were, in fact, studied in a serious and fruitful way during the seventeenth, eighteenth, and early nineteenth centuries, though rarely since. Furthermore, this return to classical concerns has led to a rediscovery of much that was well understood in this period-what I will call the period of Cartesian linguistics, for reasons that will be sketched below. Linguistics and cognitive psychology are now turning their attention to approaches to the study of language structure and mental processes which in part originated and in part were revitalized in the "century of genius" and which were fruitfully developed until well into the nineteeth century. It is important to bear in mind that the survey that has been presented here is a very fragmentary and therefore in some ways a mis-leading one. Certain major figures-Kant, for exaimple have not been mentioned or have been inadequately discussed, and a certain distortion is introduced by the organization of this survey, as a projection backwards of certain ideas of contemporary interest rather than as a systematic presentation of the framework within which these ideas arose and found their place.

만성 부비동염에서 섬모운동과 전산화 단층촬영에서의 상악동 점막비후의 상관관계

민양기,전상준,이재서,이철회,이강수,윤자복,이원진,박광석 대한이비인후과학회 1999 대한이비인후과학회지 두경부외과학 Vol.42 No.7

Our Town의 원형적 차원

梁原玉 順天大學校 1989 論文集 人文社會科學篇 Vol.8 No.-

Thornton Wilder`s Our Town is a work which has archetypal patterns, symbolic forms within routine events of human beings. This paper aims to study the archetypal dimentions in view of the values of the smallest events and order daily life. To reveal a social and psychological mechanism, Wilder has attempted to forge powerful dramatic metaphors out of setting which stands both as a threat to fragile identity and the defining boundary of the world in which his characters must move. Each act in Our Town is called `the daily life`, `love and marriage`, and `death`. They all occur in the village, Grover`s Corners, Wilder has set against the largest dimentions of time and place as a microcosm, beyond a `Now and Here`. Though George and Emily are not a hero and a heroine in myths, their pattern of life is same as the archetypal patterns of myths; growing up, the initiation ritual, the quest and death. The cycle has a power which makes of eternity a nothing and of nothingness an eternity. The vision Wilder offers of the human condition in Our. Town is essentially tragic. It is a picture of the priceless value of even the most common and routine events in life and of the tragic waste of life through failure to realize the value of every moment. It suggests both a conscious mythicism, a sense of life as ritual, and an attempt to insist on a spiritual continuity. Its central theme is the location of individual experience against the background of passing time, of universals. There are echoes here of New Humanism. In this sense Our Town is a kind of religious festival, celebrating life in developing the archetypal dimentions.