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鄭炅樹 여수대학교 2002 論文集 Vol.17 No.-
This paper empirically investigates the effect of capital structure on investment decision. According to the agency theory on capital structure, the relation between leverage and investment decision is negative because firms use less debt in order to reduce the agency cost derived from under investment. But in the signalling model on capital structure the relation of those indicates positive that the increase of leverage implies the increase of future profitability in firms The analysis is conducted with listed companies of securities exchange throughout the years 1993 to 2000. In the regression model of investment equation, investment is capital expenditure divided by total assets and leverage is defined as the ratio of total debts to the book value of total assets. Control variables include Tobin's Q ratio, firm size, equity ownership, cash flow, dividend, firm's size, tangible assets, sales growth. Ordinary least squares regression results suggest that capital structure affects negative significantly on investment decision in high and low growth firms. This means that the agency theory on capital structure is applied to listed companies in Korea. On the other hand, investment is also negatively correlated with leverage in capital structure model. The evidence shows that capital structure affects investment, and vice versa.
흰꽃무당버섯 등 한국 야생버섯에서 추출한 단백다당체 분획의 lymphoblast 생성 자극 효과
정경수,석지은 충남대학교 약학대학 의약품개발연구소 2008 藥學論文集 Vol.23 No.-
As an investigation to develop novel antitumor immunotherapeutic agents, four protein-poly-saccharide fractions from Korean wild mushrooms were subjected to a flow cytometric analysis for their in vitro lymphoblastogenic activities on the BALB/c mouse splenic lymphocytes. Of these, the protein-poly-saccharide fractions of Russula alboareolata, Russula compacta and Laccaria amethystea not only showed lymphoblastogenic activity, but also increased the viability of the lymphocytes, while that of Russula nitrata exerted marked cytocidal activity.