서울지방에서 분리된 Corynebacterium diphtheriae 균주에 관한 연구

장우현,신용우 대한미생물학회 1973 大韓微生物學會誌 Vol.8 No.1

To understand the characteristics of 29 toxigenic strains of Corynebacterium diphtheriae isolated in Seoul area, type classification, biochemical properties and antibiotic susceptibility pattern to 9 kinds of antibiotics were investigated. The results obtained were summerized as follows; I . Among the 29 strains, gravis type was the overwhelming majority (24 strains), followed by intermedius type (3 strains) and mitis type (2 strains). II. Fermentation of glucose, maltose, lactose, trehalose and mannitol, nitrate reduction and urease were tested. All strains fermented glucose, but not sucrose, lactose, mannitol and trehalose. 9 strains fermented maltose and 20 strains did not. Nitrate was reduced by 28 strains but not by one strain. In urease test one strain showed positive, 28 strains negative. III. Antibiotic susceptibility test to penicillin G, chloramphenical, kanamycin, lincomycin, streptomycin, terramycin, erythromycin and gentamycin were carried out. The MIC of erythromycin (0. 025 ㎍/ml 26 strains ad 0. 05 ㎍/ml 3 strains) was the lowest, followed by ampicillin, lincomycin and penicillin G. Streptomycin showed the highest MIC.

1986년부터 1988년사이에 우리나라에서 발생한 신증후 출혈열의 혈청역학 조사

장우현(W.H. Chang),이범구(B.G. Lee),최성배(S.B. Choi),김익상(I.S. Kim),최명식(M.S. Choi),최인학(I.H. Choi),기선호(S.H. Kee),김석용(S.Y. Kim),이우곤(W.K. Lee),최강원(K.W. Choe),최두혁(D.H. Choi),이증훈(J.H. Lee),윤태영(T.Y. Yoon),김우열(W.Y. K 大韓微生物學會 1989 大韓微生物學會誌 Vol.24 No.5

ebXML 기반 메시지 서비스 적합성 평가 도구 설계

장우현(Woo-Hyun Jang),이원근(Won-Gun Lee),최한석(Han-Suk Choi) 한국정보과학회 2003 한국정보과학회 학술발표논문집 Vol.30 No.1A

국내 전자상거래의 표준으로 채택된 ebXML에 대한 관심이 집중되면서 앞으로 전자상거래 솔루션에 대한 제품 개발이 활발히 이루어질 것으로 보인다. 현재 제품 출시 초기 단계에서 제품의 시험 및 인증의뢰에 대한 대비책을 세우기 위해 ebXML 표준적합성 시험, 인증 모델의 개발이 절실하게 필요하다. 본 논문에서는 ebXML 적합성 평가를 위한 시스템을 설계하고, 메시지 서비스의 적합성 여부를 판단하기 위한 테스트 요구 사항을 추출하여 각 요구 사항 항목에 대한 테스트 케이스를 정의한다. 본 논문에서 설계한 적합성 테스트 도구를 이용하여 ebXML Messaging Service의 표준적합성 시험, 인증을 위한 평가 기준을 제공할 수 있으며, 국내/국외 기업체의 ebXML 솔루션 제품 개발에 도움을 줄 것으로 기대한다.

Concanavalin A가 細胞性免疫反應과 體液性免疫反應에 미치는 影響 : 마우스의 T依存性 體液免疫反應에 대한 Con A의 抑制作用 Suppression of a thymus Dependent Humoral Response by Con A in Mice

張友鉉,金翼詳,李明洙,崔明植 大韓免疫學會 1981 大韓免疫學會誌 Vol.3 No.1

Mice treated with Con A 1 or 2 days prior to primary immunization with SRBC exhibited a significai.F suppression of direct PFC response. This immunosuppressive effect could be reversed by using higher doses of antigen designad to by pass T-cell function. Normal syngeneic recipient mice transferred with Con A-activated spleen cells showed a suppression of primary direct PFC response on day 6. Recipients transferred with Con A-activated thymocytes showed no effect on direct PFC responses. It is suggested that Con A induced immunosuppression of thymus-dependent humoral immune response in mice is at least partly due to the activation of a subpopulation of thymus derived cells, of which tissue source is not thymus but spleen, and that the effect is short-lived and the suppressive effect of HIR is marked in late stage.

교원 노조 합법화가 웬 말인가?

장우현 대한사립학교장회(구 대한사립중고등학교장회) 1998 私學 Vol.83 No.-

쯔쯔가무시병

張友鉉 대한의학협회 1994 대한의학협회지 Vol.37 No.12

재병행수입의 경제적 효과 분석: 자동차산업을 중심으로

장우현,Chang, Woo Hyun 한국개발연구원 2014 韓國 開發 硏究 Vol.36 No.4

국내시장에 높은 시장지배력을 지닌 사업자가 존재하여 일반적인 외국산 제품에 대한 수입 활성화나 병행수입 활성화를 통한 국내시장 경쟁도 제고에 한계가 있을 경우, 해당 사업자가 국내에서 생산하여 해외에 수출한 제품을 다시 수입해 오는 재병행수입의 촉진 또한 사회후생 증가에 기여할 수 있는 유효한 도구라고 볼 수 있다. 본 연구에서는 이와 같은 사실에 주목하여 자동차산업에서의 재병행수입의 경제적 효과를 살펴보았다. 보다 구체적으로는, 국내 자동차산업의 수요와 공급 시스템을 구조적으로 추정하여 국내에서 생산되어 미국시장에서 내수시장에서보다 현저히 저렴하게 판매되고 있는 차종들의 재수입 활성화를 가정한 반사실적 실험을 시행한 결과, 재병행수입의 활성화는 기업들의 이윤을 감소시키지만 그 이상의 소비자후생 증가와 함께 소폭의 추가 재정수입 증가를 가져와 전체적으로 사회의 경제적 후생 증가에 기여함을 확인하였다. 이는 재병행수입에 관련된 제약에 의한 정책비용이 발생하고 있는 것으로도 이해할 수 있으므로, 경쟁정책 당국은 물론 산업 및 무역 정책을 담당하는 정책당국이 이와 같은 비용을 간과하지 않도록 지속적인 관심을 가질 필요가 있을 것이다. This paper examines the possibility of 'parallel reimportation', the reimportation of goods originally produced in the country and exported to another country by profit-pursuing arbitrageurs. The chance of parallel reimportation implies unusually high level of market power of domestic enterprises, and promoting parallel reimportation can be an effective welfare-enhancing, competition-generating policy for the situation. Motivated by the finding, this paper proposes a methodology to measure the welfare effects of parallel reimportation. Specifically, this paper makes use of a structural empirical model to estimate the demand and supply system of Korean automobile market for performing a counterfactual experiment to measure the welfare effects of the parallel reimportation. The results indicates that parallel reimportation can enhance social welfare considerably by increasing consumer surplus and government tax revenue altogether, though it reduces the producer surplus.

영광원자력발전소 3,4호기 핵증기 공급계통(NSSS)의 종합건전성 감시계통의 신기술 소개

장우현(Woo Hyun Jang),최찬덕(Chan Duk Choi),김성호(Sung-Ho Kim),한상준(Sang Joon Han) 한국소음진동공학회 1992 한국소음진동공학회 학술대회논문집 Vol.1992 No.11

무선통신 표준화 기구 현황 및 PCS 표준화 동향 분석

장우현,구본희,Chang, W.H.,Koo, B.H. 한국전자통신연구원 1995 전자통신동향분석 Vol.10 No.2

무선통신의 이용급증은 전 세계적으로 시장원리에 의한 기술의 표준화와 각국의 시장보호를 위한 기술기준 제정에 대한 관심을 고조시키고 있다. 특히 세계적인 정보통신시장 개방과 연계되어 무선통신 표준의 역할이 국내외간의 원활한 통신소통 수단에서 세계 무선통신시장의 지배나 자국의 산업보호를 위한 보이지 않는 무역장벽 구축수단으로까지 변모하고 있는 것이 현실이다. 이러한 시점에서 각국의 표준화 활동기구들의 활동분야를 살펴보고 특히 최근 관심을 모으고 있는 개인휴대통신(PCS)의 제외국 표준화 현황분석을 통하여 향후 발전방향에 대하여 진단하고자 한다.

感染性 疾患의 臨床疫學的 硏究

張友鉉,朴熙明,金漢壽,李承薰 現代醫學社 1969 現代醫學 Vol.10 No.4

The advancement of modern medicine, particularly the application of effective chemotherapeutics and preventive measures, have brought significant changes on the ecological aspect of microbial diseases of man. It was thought worthwhile to study the recent trends and present status of microbial infections in this country. Thus, the relative incidences and their etiological relationships of bacterial species, the pattern of drug sensitivities among the strains, and also the cases diagnosed by the serological methods were studied for the patients of SNU Hospital from January 1963 to December 1967. The results might be summarized as follows; 1. Relationships between bacteria and diseases (1) The species and their relative incidences of bacteria, isolated from various abscess, were α-hemolytic streptococcus 26.6%, Staphyloccus aureus 22.6%, paracolon bacilli 9.9%, coliform bacilli 8.1%, Klebsiella pneumoniae 7.6%, E. coil 6.9%, β-hemolytic streptococcus 5.9%. Staphylococcus albus 3.8%. Proteus 3.8%. Alkaligenes fecalis 2.1%, Diplococcus pneumoniae 1.8% and Pseudomonas aeruginosa 1.6%. (2) The species and their relative incidences of bacteria, isolated from the pyelonephritis cases, were E. coli, 39.5%, coliform bacilli 13.5%, Pseudomonas aeruginosa 9.3%, Proteus 7.4%, Staphylococcus albus 4.6%, α-hemolytic streptococcus 4.6%, Staphylococcus aureus 2.8%, Klebsiella pnemoniae 2.8%, and Alkaligenes fecalis 2.8%. (3) The species and their relative incidences of bacteria, isolated from the osteomyelitis cases, were Staphylococcus aureus 46.5%, β-hemolytic streptococcus 12%, Staphyococcus albus 12%, coliform bacilli 6.9%, α-hemolytic streptococcus 6.9%, paracolon bacilli 5.2% and E. coli 3.5%. (4) The species and their relative incidences of bacteria, isolated from the surgical infections were Staphylococcus aureus 33%, E. coli 15.1%, coliform bacilli 11.6%, Pseudomonas aeruginosa 10.7%, paracolon bacilli 9.8%, Proteus 7.1%, α-hemolytic streptococcus 3.5%, Klebsiella pneumoniae 2.7%, and Alkaligenes fecalis 0.9%. (5) The species and their relative incidences of bacteria, isolated from the pneumonia cases, were Diplococcus pneumoniae 14.4%, Klebsiella pneumoniae 9.6%, Staphylococcus aureus 10.3%, β-hemolytic streptococcus 4.8%, paracolon bacilli 4.8%, E. coli 3.4%, coliform bacilli 3.4%, α-hemolytic streptococcus 34.6% and Staphylococcus albus 13.6%. (6) 44 strains of Salmonella group D were isolated. (7) 207 cases of Salmonella typhosa infections, 39 cases of Salmonella paratyphi A infer ctions and 20 cases of Salmonella paratyphi B infections were diagnosed by Widal. Reactions. (8) No significant change in the yearly pattern between the bacterial species isolated and clinical cases was noticed. 2. Drug-sensitivities of the bacterial strains. (1) Percentage of Staphylococcus aureus strains sensitive to streptomycin, chloramphenicol. Or terramycin appeared to have fluctuated by year. Percentages of the strains sensitive to penicillin, erythromycin albamycin, and kanamycin were 25%, 85%, 99% and 99% respectively, without significant change by year. (2) Perentage of E. coil strain's sensitive to streptomycin, erythromycin, chloramphenicol albamycin and kanamycin were 30%, 9% 70%, and 70% respectively, without significant change by year. Percentage of the strains sensitive to terramjcin decreased from 33.3% in 1963 to 11.6% in 1967 to kanamycin increased from 72% in 1963 to 82% in 1967. None of the strains was sensitive to penicillin. (3) Percentage of proteus strains sensitive to penicillin, terramycin, streptomycin and chloramphenicol were 5%, 3%, 36% and 39%, respectively, without significant change by year. Percentage of the strains sensitive to albamycin decreased from 72.5% in 1963 to 50% in 1967 and to kaiiainycin increased from 72% in 1963 to 82% in 1967. None of the strain was sensitive to erythromycin. (4) Percentage of Pseudomonas strains sensitive to penicillin, streptomycin chloramphenicol, terramycin, erythromycin, albamycin and kanamycin were wider 20% (5) Percentage of coliform bacilli strains sensitive to penicillin, streptomycin, chloramn henicol, terramycin, erythromycin and albamycin were 10%, 24%, 28%, 20% and 10% respectively, without significant change by year. Percentage of the strains sensitive to albamycin appeared to have fluctuated by year. The strains sensitive to kanamycin decreased from 80% in 1963 to 56% in 1967. (6) Pereeentage of paracolon bacilli sensitive to penicillin, streptomycin, chloramphenicol, terrahiycin, erythromycin, kanamycin and albamycin were 3%, 27%, 33%, 20%, 8%, 80% and 65% respectively, without significant change by year.