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공공임업투자(公共林業投資)에 대한 사회경제적(社會經濟的) 분석(分析)(I) - 사회적(社會的) 할인율(割引率)의 추정에 대하여 -
장철수,Chang, Cheol Su 한국산림과학회 1992 한국산림과학회지 Vol.81 No.3
공공임업투자분석(公共林業投資分析)에 있어서 사회적 비용-편익분석법을 사용할 경우 적정 할인율의 선택은 매우 중요하다. 본 연구에서는 공공경제학 부문에서 토론 되고 있는 사회적(社會的) 할인율(割引率)이 소개되며 그의 한가지 척도로서 사회적(社會的) 시간선호율(時間選好率)이 우리나라에 대하여 추정되어졌다. 사용된 모델은 소비에 대한 사회적(社會的) 한계효용탄력성(限界效用彈力性) 계수(係數)와 실질 소비성장율(消費成長率)등 두가지 변수에 기초를 두고 있다. 적용 결과 우리나라의 사회적(社會的) 시간선호율(時間選好率)은 6.2%이며 소비에 대한 사회적(社會的) 한계효용(限界效用) 탄력성계수(彈力性係數)는 -1.38로 나타났다. 이러한 결과들은 합리적인 자원배분정책을 수립하는데 유용한 기초자료로 이용 될 수 있을 것이다. When the social cost-benefit analysis is applied for analyzing the public forestry investment, the choice of discount rate to be used in analysis is critical. In this paper, the social discount rate discussed in the public economics was introduced and the social time preference rate as a measure of that was estimated for Korea. The component parameters of the model used are : the elasticity of social marginal utility of consumption and the growth rate of real consumption. The results for the social time preference rate and the elasticity of social marginal utility of consumption are 6.2% and -1.38, respectively, which are plausible and thus can be used as a useful basis in establishing rational resource allocation policies.
돼지 난소내 여포의 폐쇄과정중 과립세포의 결합능의 변화
장철수,이창주,윤용달,김문규,Chang, Choul-Soo,Lee, Chang-Joo,Yoon, Yong-DaI,Kim, Moon-Kyoo 대한생식의학회 1986 Clinical and Experimental Reproductive Medicine Vol.13 No.1
In order to study the mechanism of follicular atresia, follicles were classified into the normal groups and the atretic ones, according to the criteria with or without corpus luteum, size of follicles, vascularization, status of granulose cells and the hypertrophy of theca layers in the porcine ovary. To estimate the binding capacity of human chorionic gonadotropin (hCG) receptor on the granulosa cells during atresia, hCG were iodinated by the chloramine-T method and then purified through the column chromatography. The concentration" of hCG receptor in each group were measured by the hCG receptor binding assay. Binding capacity in large normal follicles were 1.16%, but atretic ones were 0.45%. But in medium and small follicles (below 6mm in diameter), the binding capacity in normal follicles were 0.09%, but atretic ones were 0.05%, which was lower than those of large follicles. The present ( ) that the concentrations of hCG receptors on granulosa cells is decreased when the follicles become atretic and be used as a sort of creteria for the identification of follicles atresia.
혈장 β-Thromboglobulin 측정법에 관한 연구
장철수 김천대학교 1985 김천대학교 논문집 Vol.6 No.-
We have studied the assay method of plasma -Thromboglobulin This method the results were summarized as followings. 1) Plasma seperating must do within in 4hours with collection sample. 2) Plasma seperating is higher than 3000G in centrifugation velocity. 3) The maintenance must 4C for plasma seperating temperature. 4) Plasma seperating centrifugation time is higher than 20mins. 5) Ag-Ab incubation time is higher than 60mins. 6) The coefficient of variation in intraassay and interassay were all less than 11%. The assay recovery mean 100.1%.