Changwon National University

About: Changwon National University is a education organization based out in Changwon, South Korea. It is known for research contribution in the topics: Thin film & Microstructure. The organization has 2729 authors who have published 4985 publications receiving 66561 citations.

Nonheme FeIVO complexes that can oxidize the C-H bonds of cyclohexane at room temperature.

Abstract: Nonheme oxoiron(IV) complexes of two pentadentate ligands, N4Py (N,N-bis(2-pyridylmethyl)-bis(2-pyridyl)methylamine) and Bn-tpen (N-benzyl-N,N‘,N‘-tris(2-pyridylmethyl)-1,2-diaminoethane), have been generated and found to have spectroscopic properties similar to the closely related tetradentate TPA (tris(2-pyridylmethyl)amine) complex reported earlier. However, unlike the TPA complex, the pentadentate complexes have a considerable lifetime at room temperature. This greater thermal stability has allowed the hydroxylation of alkanes with C−H bonds as strong as 99.3 kcal/mol to be observed at room temperature. Furthermore, a large deuterium KIE value is found in the oxidation of ethylbenzene. These observations lend strong credence to postulated mechanisms of mononuclear nonheme iron enzymes that invoke the intermediacy of oxoiron(IV) species.

The Value of Outside Directors: Evidence from Corporate Governance Reform in Korea

Abstract: This paper examines the valuation impacts of outside independent directors in Korea, where a regulation requiring outside directors was instituted after the Asian financial crisis. In contrast to studies of U.S. firms, the effects of independent directors on firm performance are strongly positive. Foreigners also have positive impacts. The effects of indigenous institutions such as chaebol or family control are insignificant or negative. This implies that the effect of outsiders depends on board composition as well as the nature of market in which the firm operates.

Green tea as inhibitor of the intestinal absorption of lipids : potential mechanism for its lipid-lowering effect

Abstract: Animal and epidemiological studies suggest that green tea catechins may reduce the risk of cardiovascular diseases [e.g., coronary heart disease (CHD)]. The health benefit of green tea has been attributed to its antioxidant and anti-inflammatory properties; however, considerable evidence suggests that green tea and its catechins may reduce the risk of CHD by lowering the plasma levels of cholesterol and triglyceride. Although the mechanism underlying such effect of green tea is yet to be determined, it is evident from in vitro and in vivo studies that green tea or catechins inhibit the intestinal absorption of dietary lipids. Studies in vitro indicate that green tea catechins, particularly (-)-epigallocatechin gallate, interfere with the emulsification, digestion, and micellar solubilization of lipids, critical steps involved in the intestinal absorption of dietary fat, cholesterol, and other lipids. Based on the observations, it is likely that green tea or its catechins lower the absorption and tissue accumulation of other lipophilic organic compounds. The available information strongly suggests that green tea or its catechins may be used as safe and effective lipid-lowering therapeutic agents.