http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
고분자에 결합된 금속-프탈로시아닌의 과산화수소수 분해반응에 대한 촉매활성
김공수,전용철,이영우,이상호,KimKong Soo 김공수,Yong Chul Chun,Young Woo Lee,Sang Ho Lee 대한화학회 1989 대한화학회지 Vol.33 No.6
Metal-4,4',4",4"'-tetraaminophthalocyanine [Mt-$PcNH_2$, Mt = Fe(III), Co(II), Ni(II), Cu(II)] 및 Mt-$PcNH_2$가 styrene-methacrylic acid 공중합체(STMA)에 고정화된 Mt-PcSTMA를 촉매로 사용한 불균일 수용액계에서 과산화수소의 분해반응에 대한 촉매활성에 대하여 실험하였다. 이 촉매들은 효소반응과 비슷한 촉매활성을 나타내었고, Fe(III)-$PcNH_2$이 공중합체에 결합되어 고정화된 Fe(III)-PcSTMA가 가장 촉매활성이 우수하였다. 분해반응율은 높은 pH 범위에서 증가하였으며, $CN^-,\;CNS^-,\;{C_2O_4}^{-2},\;I^-$ 등의 공존 음이온의 영향을 받았다. 또한, 반응속도론적인 고찰을 통하여 열역학적 특성값을 구한 결과로부터 촉매반응이 Michaelis-Menten형의 반응기구로 진행됨을 알 수 있었다. The decomposition reaction of hydrogen peroxide was carried out by using metal-4,4',4",4"'-tetraaminophthalocyanine [Mt-$PcNH_2$, Mt = Fe(III), Co(II)] supported on poly (styrene-co-methacrylic acid), in heterogeneous aqueous system. These catalysts showed a catalse-like activity and Fe(III)-$PcNH_2$ supported on the copolymer was particularly effective for the decomposition of hydrogen peroxide. It was found that the rate of decomposition increased smoothly in the higher pH region and catalytic reaction was interfered by adding $CN^-,\;CNS^-,\;{C_2O_4}^{-2},\;I^-$ ions. The kinetics of the catalytic reaction was also investigated and the reaction proceeds according to the Michaelis-Menten type mechanism.
류마토이드 관절염 환자에 대한 Recombinant Interferon Gamma 의 임상시험
권기운(Ki Woon Kwon),변정원(Jung Won Byun),이오영(Oh Young Lee),전용철(Yong Chul Chun),박병권(Byoung Kwon Park),김성윤(Seoug Yoon Kim) 대한내과학회 1989 대한내과학회지 Vol.37 No.2
N/A To evaluate antirheumatic efficacies and possibilities on treatment of rheumatoid arthritis with recombinant interferon-gamma, 44 patients with rheumatoid arthritis were treated with IFN-γ for 20 days and were analysed from the standpoint of Ritchie index, patient's assessment, laboratory findings and sideffect. The observed results are as follows: 1) 44 patients were enrolled, 40 patients could be evaluated. Of these, 22 were responders (55%) according to the criteria for treatment success. 2) In 35 patients, stabilized therapy was continued concomittant with the IFN-γ and were no significant differences with respect to the results of treatment. 3) In responders, Ritchie index decreased from 28 on the day of recruitment into the study to 15 on day 20. 4) The patients evaluation of morning pain and change in mobility showed more improvements in responders than non-responders. 5) Monitering of laboratory parameters revealed no therapeutically relevant changes. Side-effects occurred in 14 out of 40 patients. In 10 of these patients, transient fever was recorded.
백상현 ( Sang Hyun Baik ),함준수 ( Jun Soo Hahm ),전용철 ( Young Chul Jeoun ),이오영 ( O Young Lee ),이민호 ( Min Ho Lee ),기춘석 ( Chun Suk Ki ),박준용 ( Jun Yong Park ),은창수 ( Chang Soo Eun ),한동수 ( Dong Su Han ) 대한소화기학회 2002 대한소화기학회 춘계학술대회 Vol.2002 No.-
〈배경〉 현재까지 담석의 증가와 연관성을 가진 병적인 상태를 찾고자하는 연구가 진행되어 왔다. 대개의 류마치스 관절염환자는 NSAID를 복용하고 있는 자가 많고, 동물 실험을 NSAID가 담석 생성과 관련이 있음이 발표되기도 하였다. 본 연구에서는 류마치수 관절염환자에서의 담석의 빈도를 제시하고 matched control과의 여러 다른 기준척도등의 비교를 통해 이들간의 유의성을 비교하였다. 〈연구대상 및 방법〉 한양대 류마치스 병원에 입원하였던 선별검
HBsAg 음성 만성 간질환 환자에서 중합효소 연쇄반응법을 이용한 혈청내 B형 간염 바이러스 DNA 및 C형 간염 바이러스 RNA의 검출
전용철,정영화,민영일,양석균 대한소화기학회 1992 대한소화기학회지 Vol.24 No.5
It is well-known that unidentified viral infection or low-level of viremia can play a role in the patients with chronic liver disease of unknown origin. Still in Korea hepatitis B viral infection is the most common cause of chronic liver disease. And over 40% of HBsAg-negative patients with chronic liver disease were seropositive for anti-HCV. We studied sera from 16 patients negative for all HBV serological markers (Group A) and 35 positive for anti-HBc (Group B) to evaluate the roles of hepatitis B and C viral infections in HBsAg-negative patients with chronic hepatitis or liver cirrhosis. Nine patients (56%) in group A and 18 (51%) in group B were seropositive for anti-HCV. HBV-DNA was detected by double-polymerase chain reaction (PCR) technique using primers from pre-core/core region of HBV genome; HCV-RNA using primers from the 5-noncoding region of HCV genome. We could detect HBV-DNA in the sera from 2 patients (13%) in group A and 13 (37%) in group B. 11 (69%) and 18 patients (51%) in group A and B, respectively, had HCV-RNA in their sera. Furthermore, coexistence of HBV-DNA and HCV-RNA were found in 7 patients (14%) (1 in group A, 6 in group B). Among all of 51 HBsAg-negative patients with chronic liver disease 37 (73%) had at least one of the above two viral genomes. In conclusion, our data indicated that hepatitis C viral infection is the most common cause of chronic liver disease in HBsAg-negative Korean patients, and that hepatitis B virus may also be an important cause, especially in patients with anti-HBc in their sera.
전용철,박상욱,유종선,김구니,장기영 한국고무학회 1996 엘라스토머 및 콤포지트 Vol.31 No.2
The polyurethane was synthesized by the reaction of polycaprolactone diol(Mw 2000), 4,4'-diphenylmethane diisocyanate and 1,4-butanediol as the chain extender. Also, the modified polyurethane polymers based on liquid polybutadiene as a part of soft segment and dimethylolpropionic acid as a chain extender, giving polyurethane with various polarity, were synthesized. The thermal, mechanical, adhesion properties and water contact angles of the polyurethanes were examined. From the. result of the water contact angle, the polarity of the acid modified PU containing 6% acid content was unchanged but mechanical and adhesion properties were improved. The water contact angles on polybutadiene modified PU films were increased with increasing polybutadiene content. The mechanical properties of the polybutadiene modified PU were higher than that of acid modified PU. However, the mechanical properties were reduced as polybutadiene content increased. The result is presumably due to phase separation between hard segment and soft segment. The peel strength of the polyurethane introduced with 5wt% polybutadiene was improved about 150% than that of unmodified PU. The same as the mechanical properties, the more polybutadiene was introduced, the lower peel strength was obtained.
전용철,한동수,이민호,박근태,장세진,최호순,이오영,함준수,기춘석,손주현,박경남,윤병철 대한소화기학회 1998 대한소화기학회지 Vol.31 No.3
Background/Aims: Colonic mucosal lesions akin to mucosal changes in portal hypertensive gastropathy have been observed occasionlly in patients with portal hypertension. However the exact prevalence of these lesions, their relationship to the severity of the liver disease and their associations with gastric mucosal changes is still unclear. The present study assesses the prevalence of rectal varices and colonopathy and factors associated with them in liver cirrhosis. Methods: Thirty one cirrhotic patients and 40 controls underwent endoscopic examinations of upper and lower gastrointestinal tract. Results: Colonic mucosal changes were observed in 16 patients (51.6%) while 0 in control group. They included increased vascularity (12/16, 75.0%), spider like lesion (4/16, 25.0%), nonspecific colitis lesion (1/16, 6.3%). Rectal varices were observed in 2 patients (12.5%) but they were not observed in the controls. Pathologic finding in patients with increased vacularity showed dilatation and increase of vessels (5 of 6 patients), but there was no abnormal finding in patients with spider like lesion (0 of 3 patients). The colonic mucosal changes were not associated with the Child's grade of cirrhosis, the grade of esophageal varices, the presence of gastric varices, the history of bleeding or the patient's experience of ligation therapy. However, cirrhotic patients with portal hypertensive gastropathy had higher prevalence (70.6%) of colonic mucosal change than the patients without it (28.6%, p$lt;0.05). Conclusions: Colonic mucosal changes occur frequently in patients with portal hypertensive gastropathy. However, the prevalence of rectal varices is lower in these patients.
신창록,심종걸,전용철,권기운,이영열,김인순,정태준,최일영 대한내과학회 1990 대한내과학회지 Vol.38 No.5
An analysis of 50 patients with metastatic carcinoma from unknown primary site, seen at Hanyang University Hospital from january 1985 to December 1987, was performed. 50 patients constituted 2.4% of the total carcinoma patients registered at Hanyang University Hospital. The mean age of the patients was 55.1 years. Histopathologic diagnosis revealed adenocarcinoma in 68% and squamous cell carcinoma in 20% of the cases. The common sites of metastases were the lymphnodes, pleura, peritoneum and bones. The overall median survival time was 4.5 months. The primary sites were identified in only four patients(8%) during the follow-up periods. There was no difference in survival time between treated and untreated adenocarcinoma patients, but in squamous cell carcinoma patients group survival for treated versus untreated was 12.8 months versus 1.7 months.