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Sung-Bin Park,Chung-Seok Seo,Dae-Seung Kang,Seon-Gil Kwon,Seong-Won Park 한국방사성폐기물학회 2005 방사성폐기물학회지 Vol.3 No.2
650의 LiCl-LiO 용융염계에서 10 g UO/batch 규모의 장치를 이용해서 우라늄산화물의 전해환원 특성에 대한 평가를 수행하였다. 일체형 음극은 고체전극, 우라늄산화물과 우라늄산화물을 담아주는 다공성 용기(멤브레인)로 구성된다. 멤브레인 재료로는 325-mesh 스테인레스강막과 다공성 마그네시아 도가니를 사용하였다. 일체형 음극의 재질에 따른 LiCl-3 wt LiO계와 UO-LiCl-3 wt LiO계의 순환 전압측정법 결과로부터 전해환원 반웅 메커니즘을 규명하였다. 일체형 음극의 재질에 따른 우라늄산화물의 직접 및 간접 전해환원에 대한 실험을 수행하였다. 그 결과, 325-mesh스테인레스강막을 사용하여 직접 및 간접 전해환원으로 금속전환을 수행하였을 때 낮은 전류효율로 인해 우라늄산화물을 금속우라늄으로 환원시키지 못했으며, 마그네시아 다공성 도가니를 사용하여 간접 전해환원으로 금속전환을 수행하였을 때는 높은 전류효율로 인해 우라늄산화물을 금속우라늄으로 환원시킬 수 있었다 The electrolytic reduction of uranium oxide in a LiCl-LiO molten salt system has been studied in a 10 g UO /batch-scale experimental apparatus with an integrated cathode assembly at 650. The integrated cathode assembly consists of an electric conductor, the uranium oxide to be reduced and the membrane for loading the uranium oxide. From the cyclic voltammograms for the LiCl-3 wt LiO system and the UO-LiCl-3 wt LiO system according to the materials of the membrane in the cathode assembly, the mechanisms of the predominant reduction reactions in the electrolytic reactor cell were to be understood; direct and indirect electrolytic reduction of uranium oxide. Direct and indirect electrolytic reductions have been performed with the integrated cathode assembly. Using the 325-mesh stainless steel screen the uranium oxide failed to be reduced to uranium metal by a direct and indirect electrolytic reduction because of a low current efficiency and with the porous magnesia membrane the uranium oxide was reduced successfully to uranium metal by an indirect electrolytic reduction because of a high current efficiency.
A 16-Year Single Center Experience of Resected 2029 Pancreatic Ductal Adenocarcinoma
Sang Hyun Shin,Song Cheol Kim,Dae Wook Hwang,Ki Byung Song,Jae Hoon Lee,Bong Jun Kwak,Seong-Ryong Kim,Jaewoo Kwon,Chung Hyeun Ma,Seunghyun Hwang,Kwang-Min Park,Young-Joo Lee 대한외과학회 2016 대한외과학회 학술대회 초록집 Vol.2016 No.11
( Dae Young Kim ),( Chang Il Kwon ),( Seong Gyu Hwang ),( Pil Won Park ),( Kyu Sung Rim ),( Sung Pyo Hong ),( Hye Yoon Kang ),( Dae Ho Ahn ),( Kyung Soo Kim ),( Jung Hwan Yoo ),( Jai Ho Yoon ),( Gye D 대한소화기학회 2007 SIDDS Vol.9 No.-
Background/Aims: The signal transducer and activator of the transcription (Stat)-family of proteins are cytoplasmic transcription factors that transmit signals from cytokines and growth-factor receptors to the nucleus. Stat proteins, especially Stat3 and Stat5, are constitutively activated in various solid tumors and hematological malignancies. However, the role of Stat3 signaling in gastric carcinoma has not yet been fully determined. This study was conducted to investigate the climical value of STAT3 and STAT5 expression in gastric carcinoma. Methods: Expression of STAT3 and STAT5 was extimated by 100 resected gastric cancer cases. We evaluated the relationships between expressions of STAT3 or STAT5 and various clinicopathological factors, including stage and, overall survival. Results: Compared with normal gastric epithelial cell line, elevated activities of STAT3 and STAT5 were found in human gastric cancer cell lines. The expressive intensity of phospho-Stat3 protein was significantly increased in patients with higher TNM stage. Furthermore, the expressive intensity of phospho-Stat3 was correlated with poor survival rate. However, there was no correlation between Stat5 and clinicopathological paramenters. Conclusions: These results suggest that STAT3 may play an important role in the tumorigenesis of gastric adenocarcinoma, and it`s expression in tissue is good indicator for poor prognosis of gastric cancer. STAT3 deserves further investigation for treatment of gastric cancer.