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B형 간염바이러스에 의한 간질환에서 혈청 2´, 5´-Oligoadenylate Synthetase의 활성도
조성원 ( Jo Seong Won ),이문성 ( Lee Mun Seong ),김진홍 ( Kim Jin Hong ),심찬섭 ( Sim Chan Seob ) 대한내과학회 1990 대한내과학회지 Vol.38 No.6
N/A The in vivo activation of the interferon system was biochemically evaluated in patients with HBsAgpositive liver disease by assaying the interferon-induced enzyme, 2`, 5`-oligoadenylate synthetase, in serum. Increased values were found in 100% of the patients with acute hepatitis, 36% from chronic active hepatitis, 66% from chronic active hepatitis with acute exacerbation, 16% from chronic persistent hepatitis and 44% from liver cirrhosis. A follow-up evaluation of 2`, 5`-oligoadenylate synthetase was done in four patients with chronic hepatitis and one patient with acute hepatitis. Serum 2`, 5`-oligoadenylate synthetase activities markedly increased during interferon treatment compared with the pretreatment values in two patients with chronic active hepatitis. Serum 2`, 5`-oligoadenylate synthetase activities increased in the acute period and then normalized in the convalescent period in one patient with acute hepatitis. In one patient with chronic persistent hepatitis, serum 2`, 5`-oligoadenylate synthetase activites were within normal range, but markedly increased during the acute exacerbation period. However, serum 2`, 5`-oligoadenylate synthetase activities were within normal range during the acute exacerbation period and convalescent period in one chronic active hepatitis patient with the subsequent HBeAg seroconversion. The results suggest that the in vivo interferon system is activated during acute exacerbation in chronic hepatitis B, and that measurment of 2`, 5`-oligoadenylate synthetase levels in serum may be useful in evaluating the in vivo state of the interferon system.
윤영복,조성원,하성규,Yun, Yeong-Bok,Jo, Seong-Won,Ha, Seong-Gyu 대한기계학회 2002 大韓機械學會論文集A Vol.26 No.1
Abstract The optimization is performed to reduce the mass of CNG pressure vessel reinforced with composite materials in the hoop direction. An axisymmetric shell element which takes into account the layered liner and hoop composite materials is thus developed and incorporated into a program Axicom. The accuracy of the program is then verified using the 4 noded element in ANSYS. Three different cases of optimization are then performed using the Axicom: (1) uniform hoop thickness, (2) varying hoop thickness, and (3) varying the ply angles and accordingly the thickness. Compared with a traditional method, cases (2) and (3) were found to be very effective in reducing the thickness and cost of the hoop composite materials by about 80% without sacrificing the safety factors.