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음양곽 물추출물이 B16 Mouse Melanoma 세포의 멜라닌 생성에 미치는 영향
천현자(H J Chun),문연자(Y J Mun),김정훈(J H Kim),김일광(I K Kim),전병훈(B H Jeon),우원홍(W H Woo) 대한약학회 2000 약학회지 Vol.44 No.5
To investigate how the aqueous extracts of Epimedium koreanum Nakai (EK) affects pigmentation of skin, the aqueous extract of EK at various concentrations were incubated with 1 X 105 melanoma cells per well for 72h. The morphology and ntunber of cell line were not changed, but the aqueous extract of EK increased the tyrosinase activity and the content of melanin polymer in the cell line. These results indicate that the aqueous extract of EK promotes melanogenesis of B16 mouse melanoma cell line.
Photochemical Hydrogen Production from a Water-Methanol Mixture with Iron Oxide Suspensions
Kim, I.K.,Salmeron, M.,Hendewerk, M.,Somorjai, G.A. 圓光大學校 基礎自然科學硏究所 1986 基礎科學硏究誌 Vol.5 No.2
Photochemical hydrogen production has been detected from small particles of doped iron oxide suspended in a methanol-water(1:1) mixture. The systems studied consisted of a pure n-type semiconductor, Fe_(2-x)Nb_XO_3 (x=0.02); a pure p-type semiconductor, La_(1-X)Sr_XFeO_3 (x=0.25), and Mg-doped α-Fe_2O_3. The efficiency of the reaction increased substantially when the powders were loaded with Pt. Of the systems investigated Mg-doped α-Fe_2O_3 showed the highest efficiency. In the case of Mg-doped α-Fe_2O-3 the existence of spinel phase inclusions in the α-Fe_2O_3 corundum structure remarkably enhances the photocatalytic reactivity, which may be a result of a cathodic shift of the conduction band edge of the corundum structure and also an increase in the conductivity of the material material. Hydrogen production from these Mg-doped iron oxides is photocatalytic and occurs mainly as a result of bandgap irradiation, but also occurs with sub-bandgap illumination. There is a linearly increasing dependence of the H_2 production with increasing light intensity.