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Shielding Thickness Calculations for Line Gamma-ray Sources in Regular Geometrical Array
이종철,Lee, Chong-Chul 대한방사선방어학회 1978 방사선방어학회지 Vol.3 No.1
감마선을 방출(放出)하는 방사성발기물(放射性發棄物)드럼 5292개($42{\times}42{\times}3$) 저장시설(貯藏施設)의 적정(適正) 콘크리트 차폐체(遮蔽體) 두께를 산출(算出)하였다. 발기물(發棄物)이 여러가지 종류(種類)의 방사성원소(放射性元素)로 구성(構成)되어 있다고 할때 평균(平均)한 감마선 에너지와 개개(個個) 감마선 에너지에 대하여 계산(計算)한 결과(結果)를 서로 비교(比較)하였다. 그 결과(結果) 적정차폐체(適正遮蔽體)의 두께는 50cm 정도(程度)로 판명(判明)되었다. 그런데 평균(平均) 감마선 에너지에 근거(根據)하여 계산(計算)한 선량치(線量値)는 개개(個個) 감마선 에너지에 대한 값보다 동일(同一)두께의 차폐체(遮蔽體)에 대해서 훨씬 적었다. A shielding calculation has been carried out for a storage vault of $5292(42{\times}42{\times}3)$ waste drums in which the mixed radioactive gamma-emitters are contained. The required ordinary concrete shielding thickness seems to be approximately 50cm. The results in terms of dose rate for polyenergy gammas appear to be considerably higher than those of the averaged energy gamma.
괄루근으로부터 추출한 다당류의 항당뇨활성 및 당뇨성 쥐의 글루타치온대사에 미치는 영향
정연봉(Yeoun Bong Chung),이종철(Chong Chul Lee) 대한약학회 1995 약학회지 Vol.39 No.5
This investigation was aimed at the study of the antidiabetic activity and effect on hepatic glutathione metabolism of polysaccharide from Trichosanthes kirilowii in hyperglycemic rats with alloxan (175mg/Kg, i.p.). As the results, the polysaccharide inhibited the increase of blood glucose, triglyceride level and lactate dehydrogenase activity, but cholesterol did not change. And it increased protein bound-SH, nonprotein bound-SH, glutathione level and inhibited the decrease of glutathione S-transferase.
임종권(Jung gweon Lee),김영상(Young Sang Kim),이종철(Chong Chul Lee) 한국정보과학회 1993 한국정보과학회 학술발표논문집 Vol.20 No.1
바둑에서 안정도는 사활 혹은 게임의 승패를 결정짓는 중요한 요소로서, 다음 수를 결정하기 위한 전략적 도구이다. 본 논문에서는 반면에 놓은 돌에 대한 연결 정도를 평가하여 새로운 안정도 수식을 유도함으로서 컴퓨터 바둑에서 유용하도록 하였다.
간장 ( 肝臟 ) 및 담도 ( 膽道 ) : 만성 간염 환자에 있어서의 Ursodeoxycholic Acid ( SGD - FR ) 의 임상 효과
함준수(Joon Soo Hahm),이동후(Dong Hoo Lee),기춘석(Choon Suhk Kee),박경남(Kyung Nam Park),양석철(Suck Chul Yang),김태환(Tae Hwan Kim),이종철(Chong Chul Lee) 대한소화기학회 1990 대한소화기학회지 Vol.22 No.4
N/A Randomized double blind trials have done to determine the effect of ursodeoxycholic acid (SGD-F) to the progress of the chronic hepatitis, 30 patients who had been admitted at the department of internal medicine, Hanyang University Hospital from October 1989 to March 1990 were selected to the study; UDCA was given to 15 patients and placebo was given to the other 15 patients. The results are as follows; 1) Clinical stage showed improvement (14 cases; 93.3%) and serum transaminase was decreased markedly after UDCA (SGD-F) treatment. 2) Serum transaminase (SGOT, SGPT) was more decreased in UDCA treatment group than in placebo treatmelnt group. 3) The UCDA (SGD-F) treatment group showed more clinical improvement than the placebo treatment group. In conclusion, the ursodeoxycholic acid (SGD-F) treatment may be effective for patients with chronic liver disease.
성인경(In Kyung Sung),강인구(In Ku Kang),심승철(Seung Chul Shim),김종필(Jong Pil Kim),이기창(Kee Chang Lee),손정일(Chong Il Sohn),정철헌(Chul Hun Jung),박동일(Dong Il Park),이종철(Jong Chul Rhee) 대한내과학회 1994 대한내과학회지 Vol.46 No.3
N/A Objectives: It has been proposed that patients with non-ulcer dyspepsia can be classified into symptom subgroups. Subgroups were as follows; those with symptoms suggestive of peptic ulceration (ulcerlike dyspepsia), those with gastric stasis (dysmotilitylike dyspepsia), those with gastroesophageal reflux (refluxlike dyspepsia), and the remainder (unspecified dyspepsia). Methods: The study population consisted of 306 patients with non-ulcer dyspepsia admitted to or attending to Hanyang University Hospital from the beginning of Feb. 1990 to the end of August 1992. We evaluated the gastrointestinal symptoms and measured gastric emptying time for 150min using radionuclide scintiscan of an 99mTc-labeled chicken liver. Results: 1) A total of 306 patients with diagnosed to non-ulcer dyspepsia, 54% had dysmotilitylike dyspepsia, 16% had ulcerlike dyspepsia, 2% had refluxlike dyspepsia and 10% had unspecified dyspepsia. 2) A total of 148 non-ulcer dyspepsia patients with normal gastric emptying time, 48% had dysmotilitylike dyspepsia, 19% had ulcerlike dyspepsia, 2% had refluxlike dyspepsia and 10% had unspecified dyspepsia. 3) A total of 158 non-ulcer dyspepsia patients with delayed gastric emptying time, 61% had dysmotilitylike dyspepsia, 14% had ulcerlike dyspepsia, 2% had refluxlike dyspepsia and 9% had unspecified dyspepsia. 4) Dysmotilitylike dyspepia was more commonly present in patients with delayed gastric emptying time than in patients with normal gastric emptying time(p<0.05) 5) There was a slight female predominance (1:1.3 male-female ratio) in non-ulcer dyspepsia patients with normal gastric emptying and peak incidence was 40 to 49 years of age (40%). 6) There was a female predominance (1:1.9 male-female ratio) in non-ulcer dyspepsia patients with delayed gastric emptying and peak incidence was 40 to 49 years of age(42%). 7) A total of non-ulcer dyspepsia patients, 35% had irritable bowel symptoms and the frequency of accompanied irritable bowel symptoms was statistically significant difference between the patients with normal gastric emptying time (46%) and the patients with delayed gastric emptying time (26%)(p<0.01). Conclusion: Among the non-ulcer dyspepsia patients in Korean, dysmotilitylike dyspepsia was most common subgroup and the refluxlike dyspepsia was very rare and 35% had irritable bowel syptoms.
서보권(Bo Gwon Seo),정연봉(Yeoun Bong Chung),김용규(Yong Kyu Kim),신옥진(Ok Jin Shin),이종철(Chong Chul Lee) 대한약학회 1993 약학회지 Vol.37 No.3
It is well known that lipidperoxide, formed in vivo, induced the denaturation of enzyme and destruction of cell membrane to acute injury of tissue. Aralia elata have physiological activates, the improvement of lipid metabolism, antidiabetic activity etc., which was thought to have the relationship to lipid peroxidation. The anti-lipidperoxidative effect of Aralia elata have not yet established. In this study, we examined the anti-lipidperoxidative effects of Aralia elata (Butanol fraction) on CCl4 induced lipidperoxidation in rats, and elucidated the anti-lipidperoxidative mechanism. In rat liver homogenate intoxicated with CC14 (0.5ml/100g), BuOH fraction of Aralia elata (80mg/Kg/day) exhibited 85.41% anti-lipidperoxidative effect but in serum 69.63% inhibitory effects, respectively. In mitochondrial and microsomal fraction showed inhibition of 55.85% and 69.30%, respectively. In order to elucidate the mechanism of anti-lipidperoxidation effects of Aralia elata, enzymatic (NADPH dependent) and non-enzymatic (Ascorbic acid catalyzed) reaction, in vitro, were performed. In enzymatic reation, Aralia elata exhibited 59.43% anti-lipidperoxidation effects, but in non-enzymatic reaction exhibited 43.27% inhibition. Therefore, it is noteworthy that antioxidative power of them may mainly results from the inhibition by enzymatic reaction.
임증권(Jung Gweon Lim),김경아(Kyung A Kim),김진환(Jin Hwan Kim),박현수(Hyun Su Park),이두한(Du Han Lee),이종철(Chong Chul Lee) 한국정보과학회 1993 한국정보과학회 학술발표논문집 Vol.20 No.2
특별한 반면의 모양에 대해 적절한 다음 수가 정해지는 경우가 있는데, 이러한 경우에 대한 패턴들이 미리 저장되어 있으면, 이 들을 이용해 다음 수 선택의 판단 기준을 만들 수 있다. 본 논문에서는 이러한 패턴을 효율적으로 사용하기 위해 덩어리의 크기, 비 등형 수와 최대빈자리 수, 실제 빈자리 수, 인접 상대 덩어리 갯수를 이용해 패턴을 계층적으로 분류 저장하여 실시간 처리를 요하는 바 득에서 효율적으로 이용할 수 있도록 저장기법을 제안 하였다.
이종철,남성윤,정연봉 慶星大學校 1995 論文集 Vol.16 No.2
In this research, we examined the effect of Prunus mume and Loranthi ramulus on the active oxygen in CCI₄induced rats. In rat liver homogenate intoxicated with CCI₄(0.5ml/100g),BuOH fraction of Prunus mume and Loranthi ramulus showed a remarkable inhibition of the lipid peroxidation. And Prunus mume reduced the superoxide productivity by CCI₄about 30%, but the inhibition by Loranthi ramulus was small in contrast with Prunus mume. In the group of Prunus mume treatment, the contents of protein bound-SH, and glutathion and the activity of glutathion S-transferase was recovered to the normal level but the effect of the Loranthi ramulus was small in contrast with Prunus mume.
일엽초(Lepisorus thunbergianus)의 부탕올 추출물이 생체 지질 과산화에 미치는 영향
정연봉,안문규,이종철 慶星大學校 1993 論文集 Vol.14 No.4
In this study, we examined the anti-lipid peroxidative effects of lepisorus thunbergianus on CCl₄ induced lipid peroxidation in rats, and elucidated the anti-lipid peroxidative mechanism. In rat liver homogenate intoxicated with CCl₄(0.5ml/100g), BuOH fraction of Lepisorus thunbergianus (100mg/Kg/day) exhibited 84.90% anti-lipid peroxidative effect but in serum 79.63% inhibitory effects, respectively. In mitochondrial and microsomal fraction showed inhibition of 55.32% and 61.05%, respectively. In order to elucidate the mechanism of anti-lipid peroxidation effects of Lepisorus thunbergianus, enzymatic(NADPH dependent) and non-enzymatic(Ascorbic acid catalyzed) reaction, in vitro, were performed. In enzymatic reaction, Lepisorus thunbergianus exhibited 60.64% anti-lipid peroxidation effects, but in non-enzymatic reaction exhibited 47.92% inhibition. Therefore, it is noteworthy that antioxidative power of them may mainly results from the inhibition by enzymatic reaction.