위암의 Epidermal Growth Factor 및 Epidermal Growth Factor Receptor 표현에 관한 연구

조백환,정상우,조규혁 대한의학협회 1990 대한의학협회지 Vol.33 No.8

실험적 뇌경색에서 모세혈관 구축에 관한 전자현미경적 연구

조진호,이제혁,정상우 대한신경외과학회 1987 Journal of Korean neurosurgical society Vol.16 No.1

Experimental brain infarcts in rats were studied light and electron microscopically to investigate the factor (s) controlling contrast enhancement on CT scans of the infarcts. Brain infarction was induced by injection of fine autologous blood clots through the right internal carotid artery and the affectd brain was processed for examination I day, 2 days, and 1,2,4,6 and 8 weeks after the injection. The lesion of early, necro-degenerative stage (1 day to 1 week) showed structural disintegration of capillary endothelial cells with dissolution of tight junctions. The lesion of middle, regenerative stage (2 to 4 weeks) was characterized by proliferation of new capillaries. They had well-formed tight junctions and continuous basement membrane. The endothelial cells, however, had intraluminal villous projections and many pinocytotic vesicles, suggesting an increased permeability. The capillaries matured at late, reparative stage (8 weeks), appearing similar to those in normal brain tissue except that they were loosely surrounded by astrocytic foot processes. It was presumed that the increased permeability of new capillaries might play an important role for contrast enhancement observable clinically during the middle stage (2 to 4 weeks).

全南住民에 있어서 惡性腫瘍의 統計的 觀察 (第2報)

曺圭赫,柳柱容,尹康爀,鄭相愚,梁東旭,李珉撤,崔燦 全南大醫大 1983 전남의대학술지 Vol.20 No.4

全南住民에 있어서 腫瘍의 統計的 觀察(第1報) : First Report

曺圭赫,鄭相愚 全南大醫大 1976 전남의대학술지 Vol.13 No.2

상악 제1대구치 근심협측 치근의 근관계에 관한 연구

조동현,최호영,박상혁,최기운 大韓齒科保存學會 2003 Restorative Dentistry & Endodontics Vol.28 No.3

This study is to investigate the canal system in the mesiobuccal root of the maxillry first molar. 61 maxillary first molars were randomly selected. Serial transverse sections were made perpendicular to the long axis of the mesiobuccal root. Each section was placed in 3% sodium hypochlorite for 24 hours and rinsed in water and dried. The resected surface was stained with 2% methylene blue dye and examined with stereomicroscope. 1. Canal configuration analysis showed that 36.1% of the specimen classified as type Ⅰ, 16.4% as type Ⅱ, 37.7% as type Ⅲ and 9.8% as type Ⅳ. 2. Type Ⅱ canal was merged in one canal within 1 to 4mm of the apex. 40% of type Ⅱ cnal coverged at 2mm of the apex. 3. Type Ⅳ canal was divided into two canal within 2 to 4mm of the apex. 66.6% of type Ⅳ canal branched off at 2mm of the apex. 4. None of the sections had more than two main root canal. 5. 48.4% of the sections in 3mm with two canals contained an isthmusand more than 70% with two canals has isthmus at 4 to 5mm sections. 63.9% of the mesiobuccal root of maxillary first molar had two canaland 76.% of sections with two canals in 5MM had an isthmus. Because of this complexity the clinician should always search for extra canal carefullyand root canal system, including an isthmus, should be cleaned and shaped completelyand obturated three dimensionally for successful endodontic treatment.

상아질에 대한 저점도 복합레진의 자가접착에 관한 연구

조태희,최경규,박상혁,박상진 大韓齒科保存學會 2003 Restorative Dentistry & Endodontics Vol.28 No.3

The objectiveness of this study was to evaluate whether low-viscosity composite can bond effectively to dentin surface without bonding resin. The low-viscosity composites being 50wt% filler content were made by the inclusion of bonding resin of two self-etching systems(Clearfil SE Bond, Unifil Bond) varied with contents as 0, 10, 20, 30, 40, 50wt%. Exposed dentin surfaces of extracted 3rd molars are used. Dentin bond strengths were measured. The tests were carried out with a micro-shear device placed testing machine at a CHS of 1mm/min after a low-viscosity composite was filled into an iris cut from micro tygon tubind with internal diameter approximately 0.8mm and height of 1.0mm. 1. Flexural strength and modulus was increased with the addition of bonding resin. 2. Micro-shear bond strength to dentin was improved according to content of bonding resin irrespective of applying or not bonding resin in bonding procedure, and that of Clearfil SE Bond groups was higher than Unifil Bond. 3. There were no significant difference whether use of each bonding resin in bonding procedure for S-40, S-50, U-50(p>0.05). 4. In SEM examination, resin was well infiltrated into dentin after primed with self-etching primer only for S-50 and U-50 in spite of the formation of thinner hybrid layer. Low viscosity composite including some functional monomer may be used as dentin bonding resin without an intermediary bonding agent. It makes a simplified bonding procedure and foresees the possibility of self-adhesive restorative material.

오프라인 기반 가상공동체 구성원의 심리적 유형과 온라인 의사소통 매체에 대한 사회 연결망 분석

조남재,박기호,박상혁 한국정보사회진흥원 2006 정보화정책 Vol.13 No.4

오프라인 기반 가상공동체 활동을 위한 온라인 매체는 구성원간 사회적 관계형성을 위한 보완적 역할을 하고 있다. 온라인 의사소통 도구 중 전자우편과 메신저의 경우 개인간 뿐만 아니라 기업 내외적 활동에 있어서도 그 활용도가 중가하고 있다. 구성원간 사회적 관계형성과정은 심리적 성향 및 선호 커뮤니케이션 매체선택에 의해 영향을 받을 수 있음에도 불구하고 이에 대한 연구는 충분히 이루어지지 않았다. 따라서 심리적 성향과 온라인 매체 상에서의 네트워크 수준간의 관계에 대한 연구가 필요하다. 본 연구는 개인의 심리적 유형과 온라인 비동기 매체인 전자우편과 동기 매체인 메신저를 사용하는 구성원간의 사회연결망 관계를 연구하였다. 실증분석결과 내향사고형의 경우 메신저 상에서의 사회연결망 수준이 가장 높은 것으로 나타났으며, 전자우편의 경우는 외향사고형의 경우가 가장 높은 것으로 나타났다. 연구의 결과는 온라인상에서의 개인의 의사소통 방식에 대해 보다 이해의 폭을 넓힐 수 있으며, 심리적 성향에 따른 온라인 사회연계성 정도를 파악함으로써 온라인 마케팅활동과 관련한 시사점을 제공할 수 있을 것이다.

레진시멘트의 접착 내구성에 관한 연구

조민우,박상혁,김종률,최경규 대한치과보존학회 2007 Restorative Dentistry & Endodontics Vol.32 No.4

토양 내 수속성 유기물에 대한 천연계면화성제의 작용

윤상혁,조대철 순천향대학교 산업기술연구소 2002 순천향 산업기술연구소논문집 Vol.7 No.2

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정신과 문제로 병사용 진단서를 발급받은 환자들의 임상적 특징

장혁진,김학렬,박상학,김상훈,조용래,표경식 조선대학교 2001 The Medical Journal of Chosun University Vol.26 No.2

Background and Objectives : Most Korean young men should take a military physical examination. This study attempted to search the social, economical and psychological features of Korean youths who have psychiatric problems in taking the military physical examination. So this study was intended to help decide whether the youths enter the military service or not. Materials and Methods : This study analyzed diagnostic features that were grouped by 7 categories (antisocial and borderline personality disorder group, the other personality disorders group, psychosis group, organic mental disorder group, neurosis group, pervasive developmental disorders group, the other groups). The study was conducted from 1994 to May 1999 at Chosun University hospital with about 143 patients who were issued the psychiatric certificate for military affairs. Results : According to the results of the psychiatric examination, the antisocial and borderline personality disorder group had increased more year by year than the other groups. Classified by the residential distribution, the residents of agricultural areas belonged to the psychosis group more than others. Classified by the job distribution, the antisocial and borderline personality disorder group had more gangsters than the other groups. Also the pervasive developmental disorders group included those Who were without an occupation. Classified by visiting companion, those who were included in the antisocial and borderline personality disorder group and pervasive developmental disorders group used to come alone as compared with the other groups. In the case of those who have experienced psychiatric treatment in the past and who have been treated psychiatrically after being given the psychiatric certificate, the psychosis group comprised more than 50% statistically. In the case of the existence of a tattoo and self-injured scars, the antisocial and borderline personality disorder group has more than the others statistically. According to psychological examination, by measure of validity scale of MMPI, the antisocial and borderline personality disorder group appeared as the inverted V shape that L, K value was low and F value was high. And the antisocial and borderline personality disorder group measured by the Pd, Pa measure. Pd, Pa measure value got higher points than the organic mental disorder group statistically. Conclusion : The number of the antisocial and borderline personality disorder patients’ visits increased at the psychiatric hospital year by year and there were many gangsters or persons without regular occupation in that kind of patients’group. And there were many visitors who came by themselves to the hospital. Also they tended to have a tattoo or self-injured scars. And most of patients didn’t do commuting psychiatric care after receiving the psychiatric certificate. In the aspect of the psychological examination, they were likely to exaggerate their symptoms or disguise having psychiatric trouble intentionally.