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류성열 ( Sung Yul Ryoo ),구철도 ( Chul Mo Koo ) 한국지식경영학회 2012 지식경영연구 Vol.13 No.4
Although the role of information systems (IS) on environmental sustainability much attention, the coordination between green practices and environmental management information systems (EMIS) in a firm remains unexplored area in environmental management and IS disciplines. This study elaborated the antecedents of the coordination between green practices and EMIS and then examines the links among them. Also, this study investigated the links from the coordination between green practices and EMIS to firm`s environmental performance. The results showed that both attitudes of managers who are responsible for a firm`s green practices and their support had direct effects on the coordination between green practices and EMIS. Also, consistent with environmental management literature, the study provides a better understanding of the relationship between the coordination between green practices and EMIS and environmental performance.
원발성 간암에 있어서 종양표지자로서 이상 Prothrrombin ( PIVKA - 2 ) 측정의 유용성
이숭(Soong Lee),윤경환(Kyung Whan Yoon),구철(Chul Koo),최성규(Sung Kyu Choi),유종선(Jong Sun Rew),윤종만(Jong Mann Yoon) 대한내과학회 1990 대한내과학회지 Vol.39 No.1
N/A Abnormal prothrombin, known as PIVKA-II (protein induced by vitamin K absence or antagonist-II) or DCP (des-γ-carboxyprothrombin), is released from the liver into the blood of patients with vitamin K deficiency or vitamin K antagonist users (wafarin sodium), or patients with various liver diseases, especially hepatocellular carcinoma. Recently. abnormal prothrombin has been reported to be as good a marker of hepatocellular carcinoma as alpha-fetoprotein (AFP), and its production may be due to the reduction of vitamin K-dependent carboxylase activity. In order to assess the usefulness of abnormal prothrombin and the correlation between abnormal prothrombin and AFP in hepatocellular carcinoma, we measured the plasma abnormal prothrombin using enzyme immunoassay in 60 patients with liver diseases and in 15 healthy controls. The results were as follows: 1) The mean value of plasma abnormal prothrombin in the normal controls was 0,06±0.02 AU/ml. 2) The mean value of plasma abnormal prothrombin in patients with hepatocellular carcinoma was 5.82±4.78 AU/ml, and there were significant differences between hepatocellular carcinoma and liver cirrhosis, chronic hepatitis and other non-tumorous liver diseases. The positivity of abnormal prothrombin in hepatocellular carcinoma was 70.6% 3) The sensitivity and specificity of plasma abnormal prothrombin as a marker of hepatocellular carcinoma with a diagnostic cut-off value of 0.13 AU/ml were 70.6% and 90.7%, and they were 58.8%, and 97.7% with a cut-off value of 3.0 AU/ml, respectively. The sensitivity and specificity of AFP with a diagnostic cut-off value of 20 ng/ml werC 64.7% and 76.6% and they were 35.3% and 95.3% with a cut-off value of 400 ng/ml, respectively 4) 1 here was no significant correlation between the plasma abnormal prothrombin and serum AFP in patients with hepatocellular carcinoma (r=0.45 p>0. 05). 5) There was no significant correlation between the tumor size and plasma abnormal prothrombin (r=0.04, p>0.05) or the serum AFV level (r=0.01, p>0.05). These results suggest that plasma abnormal prothrombin could be employed as a useful tumor marker together with AFP in patients with hepatocellular carcinoma.
유종선(Jong Sun Rew),최성규(Sung Kyu Choi),윤경환(Kyung Hwan Yoon),김형원(Hyung Won Kim),김미정(Mi Jung Kim),구철(Chul Koo),김세종(Se Jong Kim),윤종만(Jong Mann Yoon),이민철(Min Cheol Lee) 대한소화기학회 1990 대한소화기학회지 Vol.22 No.4
Tumors of neurogenic origin are rare and constitute.about 496 of all tumors found i the stamach. Neurilemoma (schwannoma, neuroma) and neurofibroma are the most prevalent. Gastrointestinal symptoms of neurogenic tumors result from obstruction or bleeding. A 57-year-old female presented with epigastric pain for 9 months. UGI series and ahdominal CT showed a submucosal tumor at gastric fundus. Endoscopic exam revealed submucosal tumor with central ulceyation and bridging folds. Microscopic exam of endoscopic biopsy suggested neurilemoma. Local tumor excision was performed. The nerve origin of this tumor was confirmed by positive staining of histchemical study with S-100 protein and by demonstrating Schwann cells with long cytoplasmic processes. on electron microscopic study. The finaI histologic diagnosis was neurilemoma. So we reprot a case with a review of relevant literatures.
광중합성 수지를 이용한 파절된 도재 소부 전장 금관의 수복에 관한 치험례
정재헌,김정희,구철인 朝鮮大學校 口腔生物學硏究所 1987 口腔生物學硏究 Vol.11 No.-
Last several decades, many studies have been reported on prosthodontics using porcelain which is esthetic materials. This porcelain has been used in denture porcelain teeth, porcelain laminate veneer, porcelain fused to metal crown and porcelain jacket crown. The porcelain fused to metal crown is most porpular among these porcelain used prosthetics. The porcelain of porcelain fused to metal crown may be fractured due to lack of adhesion between porcelain and metal, disharmony of thermal contraction, abnormal occlusion, careless treatment of wrong design, etc. Therefore, there have been many porgress in restoration of fractured porcelain fused to metal crown. There are several metho in restoration of fractured porcelain fused to metal crown. 1. The porcelain fused to metal overcasting method. 2. The porcelain fused to metal pin retained casting method. 3. The method using composite resin. 4. The method using acrylic resin. Among these many restorative methods, methods using light activated composite resin is comparatively easy to restore in patient mouth and can obtain esthetically good result.