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정경태,박병수,최호순,고정희,박강서,조병석,이현상,최덕례 대한소화기내시경학회 1994 Clinical Endoscopy Vol.14 No.3
Endoscopic infection sclerotherapy(EIS) has been shown to be the most effective simple method for control of bleeding and eradication of varices. This method has been accepted widely as a standard treatment of bleeding esophageal varices. However, EIS may be associated with undesirable local and systemic complications. Endoscopic variceal ligation(EVL) was first described in 1986 by Stiegmann et al, which consists of mechanical ligation and thrombosis of varices using elastic $quot;0$quot;-ring. EVL has been shown to control active bleeding and to eradicate varices when sessions are repeated. The purpose of this study was to compare with change of esophageal variceal form, with respect to safety, efficacy and complications of EVL in the each sessions. We performed EVL in 43 patients who had recently bled from esophageal varices. Total 679 variceal ligations were performed during 174 separyte EVL sessians. Eighteen(94.7%) of those actively bleeding(19 patients) at initial treatment had bleeding controlled at initial session. During the study period two patients died after 1st and 3rd session, one who died from aggravation of concomitant hepatoma with rebleeding, the other died from early massive rebleeding after 3rd session. Rebleeding, before eradicates varices, occured in 7 patients(16.3%) two patients had bled from varices with aggravation of concomitant hepatoma, other 2 patients had bled from early varices ligation, other 3 patients had bled from re-varices formation in fundus of the stomach. Varices were eradicated or reduced to F₁ in 36 patients(87.8%) of the 41 follow up patients. Each patient received mean 15.8 ligations and 4.1 sessions during the 1st to 6th sessions. Eradication rate of varices(F_0) has increased from the 3rd to the 4th session periods. Improvement rate of varices(F₁) has increased from the 1st to the 3rd session periods. During the 5th or the 6h EVL sessions, eradication and improvement rate of esaphageal varices has been shown to decreased. During or after EVL, there were no major complications, except mild chest discomfort in 6 patients, early bleeding in 2 gatients, mild dysphagia in one patient of 43 patients. According to this study, EVL appears to control active variceal bleeding and eradicate varices with repeat treatments. It is a safe and effective treatment for esophageal varices bleeding. We recommended EVL as an alternative to EIS over the 5th sessions.
정경태 강원대학교 부설 창강제지 기술연구소 1999 제지기술 Vol.- No.13
Alkenyl succinic anhydride(ASA) size 에멀젼 제조에 영향을 미치는 전분의 특성과 이전분이 사이징 효과에 어떤 영향을 미치는 지를 논의하고자 한다. ASA 사이징에 사용되는 전분의 특성으로는 양이온 치환도와 분자량, 그리고 원료 전분(감자, 옥수수, 찰옥수수) 및 종이내 전분 첨가량을 들 수 있다. ASA 에멀젼 품질과 안정성 그리고 종이의 사이즈도는 전분의 양이온 치환도와 첨가량에 따라 많은 영향을 받으며 따라서 높은 치환도의 전분을 많이 첨가하는 것이 유리하다. 한편 전분의 분자량은 ASA 에멀젼 품질에 영향을 미치지 않으며 ASA 사이징시 감자 전분 보다 일반 옥수수 전분이나 찰옥수수 전분이 더 효과적이다.
On the algebra and Einstein's connection in 2-dimensional *g-UFT
정경태,김성극 연세대학교 대학원 1980 延世論叢 Vol.16 No.2
Many types of solutions of Einstein's equation hove been obtained so far. They are, however, too complicated for the first class, probably due to the complexity of the 4-dimensional generalized Riemann space X4. The main purpose of the present paper is to study the algebraic and differential geometric peoperties of 2-dimensional *gλν-unified field theory in X2, reducing the dimension to 2. In particular, the solution of Einstein's equation will be obtained in a simple tensorial form using a particular recurrence relation.
On the 2-dimensional Considerations of Eigenvectors of k_(ij) in X₂
鄭慶泰,曺仲鉉 연세대학교 대학원 1977 延世論叢 Vol.14 No.2
본 논문의 목적은, 첫째로, (Mhλμ+kλμ)eμ= 0 에 의하여 정의된 eigenvalue M과 대응되는 eigenvector eυ의 특성을 X2에서 연구하고, 둘째로, nonholonomic frame을 X2에 도입하여 hλμ 와 kλμ eυ의 함수관계로 표시하는 데 있다.
정경태,Tae Ho Lee,Gyong Suk Kan 한국생물공학회 2003 Biotechnology and Bioprocess Engineering Vol.8 No.3
BiP, immunoglobulin binding protein, is an ER homologue of Hsp70. However, unlike other Hsp70 proteins, regulatory protein(s) for BiP has not been identified. Here, we demonstrated the presence of potential regulatory proteins for BiP using a pull-down assay. Since BiP can bind any unfolded protein, only the ATPase domain of BiP was used for the pull-down assay in order to minimize nonspecific binding. The ATPase domain was cloned to produce recombinant protein, which was then conjugated to CNBr-activated agarose. The structural conformation and ATP hydrolysis activity of the recombinant AT-Pase domain were similar to those of the native protein. Eight proteins from metabolically labeled mouse plasmacytoma cells specifically bound to the recombinant ATPase protein. The binding of these proteins was inhibited by excess amounts of free ATPase protein, and was dependent on the presence of ATP. These proteins were eluted by ADP. Of these proteins, Grp170 and BiP where identified, while the others were not identified as known ER proteins, from Western blot analyses. The presence of the ATPase-binding proteins for BiP was first demonstrated in this study, and our data suggest similar regulatory machinery for BiP may exist in the ER, as found in prokaryotes and other cellular compartments.
Vector product의 V_n에서의 n차원적 확장에 관하여
정경태,황인호,소금숙 연세대학교 자연과학연구소 1982 學術論文集 Vol.9 No.-
일반화된 Vector produce의 새로운 개념을 n차원 Riemann공간 V_n에 도입하고, 이 개념과 관련된 몇 가지 기본적 성질을 얻는 것이 본 논문의 목적이다. 또한, 본 논문에서는 매우 유용한 몇 가지 n차원 관계식을 유도하는데, 이 관계식은 3차원 Euclid공간에서 성립하는 관계식의 일반화된 것이다. In the present paper a new concept of vector product of n-1 vectors in a Riemannian space V_n, which is a generalization of vector product of two vectors in a 3-dimensional Euclidean space E_3, will be introduced using the concept of n-dimensional indicators. The purpose of the present paper is to obtain some elementary properties of this concept and to derive several useful generalized relation in V_n.
정경태 강원대학교 부설 창강제지 기술연구소 1996 제지기술 Vol.- No.5
인쇄용 도공지의 제조 기술은 초지공정, 도공재료, 도공 조성공정, 도말공정, 건조공정, 마감공정, 계장기술, 품질평가 방법 등에 관한 많은 기술로부터 이루어진다. 이번은 도말공정과 일부 원재료에 한정해 최근의 기술 도향을 기재했다.