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대황감초음자(大黃甘草飮子)와 그 구성약물군(構成藥物群)이 Alloxan 유도 당뇨(糖尿) 백서(白鼠)의 혈청 조성 및 항산화 효과에 미치는 영향
고원도,곽동걸,신화석,최오철,박선동,Go Won-Do,Gwak Dong-Gul,Shin Hwa-Seog,Choi Oi-Chul,Park Sun-Dong 대한한의학방제학회 2002 大韓韓醫學方劑學會誌 Vol.10 No.2
The purpose of this study was to reseach the effect of Daehwanggamchoeumja(大黃甘草飮子) and its component groups on diabetes, free radicals, and antioxidants system in Alloxan-induced diabetic rats. The experimental group was divided into three groups: Daehwanggamchoeumja(DG), and its components groups, Gamdutang (Gamcho&Daedu; DG-I) and Daehwanggamchotang(DG-2). The results were obtained as follows: 1. In the study of effect on diabetic metabolic dysfunction(Glucose, Triglyceride, Total Cholesterol, HDL Cholesterol, Total Protein, Albumin, Creatine, BUN), only DG has a significant effect. 2. In the study on free radical scavenging effect in vitro(the suppressing effect on peroxidation of linoleic acid on concentration, the scavenging effect of DPPH radical, inhibitory effect of superoxide in xanthine-xanthine oxidase system, inhibitory effect on lipid peroxidation reaction by hydroxy radical in $H_2O_2Fe^{2-}$system, and the effect on Nitrate reductase activity), DG and DG-2 have more effect than DG-l relatively. 3. In the study on antioxidants system in vivo(The level of serum LPO, The level of hepatic LPO, Catalase, GSH, GST), only DG has a significant effect. These results suggest that Daehwanggamchoeumja(大黃甘草飮子) has an effect on diabetes, peroxidative damage by free radical, so it seems to be useful to prevent and treat diabetes. The mechanisms of these are supposed to be involved in antioxidant and three drugs' cooperative synergy effect.
高元島,朴賢俊,尹炳局,鄭成伊,朴宣東 대한본초학회 1999 大韓本草學會誌 Vol.14 No.2
The purpose of this study is to observe the effects of Hwanglyuntang on serum reactions of CCI₄ treated rats. In this study the experimental rats were divided five groups(Normal, Control, Sample A, Sample B and Sample C). Under the same condition Normal group was fed basal diet and water, the Control group was injected with carbon tetrachloride(CCI₄, 0.5㎖/㎏) and fed a basal diet for 2 weeks, the Sample A group was injected with carbon tetrachloride(CCI₄, 0.5㎖/㎏) and fed the Hwanglyuntang extract(10㎖/㎏) for 2 weeks, the Sample B group was fed the Hwanglyuntang extract(10㎖/㎏) for 2 weeks and injected with carbon tetrachloride(CCI₄, 0.5㎖/㎏), the Sample C group was fed on the Hwanglyuntang extract(10㎖/㎏) for 2 weeks. The change in GOT, GPT, γ-GPT, ALP, LDH activity and Bilirubin level in blood serum were preasured. The obtained results are summarized as follows : It was found that GOT, GPT, γ-GPT, ALP LDH activity and Bilirubin levels in the blood serum of the sample groups, as compared with control group, sample group was significantly decreased.
On a Lotka-Volterra type simple food-chain model
고원률,류기문 충청수학회 2007 충청수학회지 Vol.20 No.3
In this paper, we study a Lotka-Volterra type simplefood chain model. We investigate the positive coexistence of thesteady states to the model and give some results for the extinctionof species under certain assumptions which can be interpreted asDomino eect and Biological control. The methods of a decouplingoperator and the xed point index theory on a positive cone areused as well as the comparison argument. Numerical evidences forour results also are provided.
고원식,김대일 한국인구학회 2019 한국인구학 Vol.42 No.2
본 연구는 가구 내 공동 소비재(public goods)를 통해 발생하는 규모의 경제에 대해 간단한모형을 제시하고, 이를 기초로 미혼 청년층의 1인 독립 가구로의 탈출 확률(exit hazard)을 분석한다. 실증 분석 결과에 의하면, 취업과 소득과 같은 개인 변수 뿐 아니라 가구 소득 및 가구원 수 등 청년층이 속한 가구의 특성들도 공동 소비재로 인한 규모의 경제 하에서의 최적화(optimization)에 부합되는 방향으로 탈출 확률에 영향을 미치는 것으로 나타났다. 특히 청년층의 1인 가구로의 탈출 확률은 가구원 수에 따라 처음에는 하락하는 양상을 보이는데, 이러한 결과는 최근 핵가족화, 저출산 등으로 인한 가구 소규모화 추세가 청년층의 1인 가구 형성을 더가속화시킬 수 있음을 시사한다. This paper offers a simple model of scale economy in household consumption at the presence of collectively consumed public goods, and analyzes the choice to form a 1-person household among the single youths. The model predicts that the incentive to form a 1-person household decreases initially with the household size as the benefits from scale economy is greater in a larger household. The empirical results indicate that the exit hazard to 1-person household tends to decrease with household income and size, which is broadly consistent with the model’s implications. The negative effect of household size implies that the trend toward 1-person household among the youths is likely to accelerate, or at least continue, given the trend of falling fertility and smaller family size.