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장우익 ( Jang U Ig ),안강현 ( An Gang Hyeon ),이종인 ( Lee Jong In ),김현수 ( Kim Hyeon Su ),김효열 ( Kim Hyo Yeol ),김수경 ( Kim Su Gyeong ),이동기 ( Lee Dong Gi ),배선우 ( Bae Seon U ),심영학 ( Sim Yeong Hag ),강명서 ( Kang Myeo 대한내과학회 1993 대한내과학회지 Vol.44 No.4
Background: Detection of tumor markers could offer an accessible method for screening risk groups in order to achieve an early diagnosis of cansers, to contribute to and adequate staging, and to help evaluate effects of therapy. CA 125 is an antigenic determinant defined by murine monoclonal antibody OC 125, and synthesized by coelomic epithelial derivatives such as Mullerian epithelium and mesothelial tissues. CA 125 is regarded as useful tumor marker for non-musinous epithelial ovarian tumors. So we investigated whether CA 125 is reliable tumor marker for gastrointestinal malignancies and especially for detection of intraperitoneal carcinomatosis unrecognized by conventional imaging studies. And we compared CA 125 with other conventional tumor markers in the serodiagnosis of gastrointestinal malignancies. Methods: Serum CA 72-4, CA 19-9, CA 125 and CEA were determined radioimmunologically with monoclonal antibodies. A cut-off value of 4 U/ml, 37 U/ml, 35 U/ml and 5 mg/ml were used respectively. Results: The results are summarized as follows. 1) CA 125 had high specificity (93%) for benign gastrointestinal disease but was not useful to differetiate malignant ascites and benign ascites. 2) In gastric carcinoma, the sensitivity of CA 125 (36%) was not so different to that of CA 72-4(36%). 3) In pancreatobiliary carcinoma, the sensitivity of CA 125(55%) was inferior than that of CA 19-9 (85%), but combined use of these two tumor markers increases sensitivitu(95%) for the diagnosis. 4) The sensitivities of CA 125 for 23 early gastric cancer was 9%. 5) The sensitivities of CA 125 for the intraperitoneal carcinomatosis that was not recognized by conventional imaging studies was 36%. Conclustion: Our data indicates that CA 125 is not better in the serodiagnosis of gastrointestinal malignancies than other conventional tumor markers, and CA 125 has a little predictive value in the diagnosis of intraperitoneal carcinomatosis unrecognized by the conventional imaging studies. Serum CA 125 elevation in benign or malignant diseases closely correlated with the presence of ascites.
온도 및 전류밀도 변화에 따른 Pd도금막 특성변화 연구
배인경,최광진,김주희,김영대,심상준,우경자,조영상,Bae, In-Gyeong,Choe, Gwang-Jin,Kim, Ju-Hui,Kim, Yeong-Dae,Sim, Sang-Jun,U, Gyeong-Ja,Jo, Yeong-Sang 한국재료학회 1999 한국재료학회지 Vol.9 No.8
균일하고 치밀한 미세구조를 갖는 Pd박막이$ PdCl_2$를 사용하는 전기도금방법으로 제조되었다. 본 연구에서는 도금온도와 전류밀도가 주요 공정변수로서 고려되었고 이에 따른 음극효율 및 제조된 Pd도금막의 결정성, 형상 및 경도 등의 특성이 측정되었고, 이들간의 상호관계성이 검토되었다. 연구결과에 따르면, $PdCl_2$를 사용하는 본 Pd전기도금 시스템에서는 5$0^{\circ}C$와 5mA/$\textrm{cm}^2$의 조건이 도금막의 형상으로 볼 때, 최적의 도금조건이라고 간주된다. 최적 조건에서 제조된 Pd도금막의 경도는 약 600kg/$\textrm{mm}^2$이었다. 변수 및 특성간의 관계성 검토 결과, Pd막의 경도는 미세구조에 의해 큰 영향을 받지만, 결정의 배향성과의 연관성은 작은 것으로 해석된다. Palladium thin films of uniform and highly dense microstructure were prepared by the eletroplating method using novel PdCl$_2$-based plating bath. Principal variables taken into account in this study were the plating temperature and the current density. Electroplated Pd films were characterized for Crystalline orientation, morphology and hardness. The optimal temperature and current density were found be $50^{\circ}C$ and 5mA/$\textrm{cm}^2$, repectively. The measured hardness value for the Pd films when prepared under the optimal condition was as high as 600kg/$\textrm{mm}^2$. A correlation study between variables and properties seems to indicate that the hardness was significantly affected by the microstructure, but not by crystallite orientation.