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H. Matubara,K. Miharu,K. Kinoshita,K. Koyama,Yang Ye,K. Takahashi,I. Yoshimura,Y. Yamamoto,Y. Miura,Y. Kinoshita 한국생약학회 1998 Natural Product Sciences Vol.4 No.3
The analogues of lichen components showing anti-tyrosinase activities were synthesized. 4-Alkylresorcinol derivatives showed both the inhibitory activity and cytotoxicity in B-16 melanona cells at the doses of 10 mM to 1.2 mM. Resorcinol and 4-methylresorcinol showed the inhibitory effect with a low cytotoxicity at the doses of 2.5 mM and 600 μM among 4-alkylresorcinols, respectively. Some diphenylmethane derivatives (Type A, B, and C) had strong activities with a low cytotoxicity. While xanthene derivatives had no effect. Glucosides of 4,5-alkylresorcinol and the diphenylmethaney derivative (Type B) were prepared to decrease the cytotoxicity. As result, no effect were observed. Liposome of the diphenylmethane derivative (Type B) was prepared for the same purpose, and the later showed a remarkable effect at the dose at 1.5 μM with a low cytotoxicity.
남지우,김동욱,배미영,박강순,김정현,노상률,최영일,김희종,장동욱,최소명,권영준,Hikita, S.,Yu, C.,Yoshimura, Y.,Kichimi, H. 성균관대학교 기초과학연구소 1998 論文集 Vol.49 No.-
We investigated the properties of BELLE Time Of Flight(TOF) counter using the data taken in Jan 98 beam test at Pi2 beam line at KEK 12 GeV proton synchrotron. Charge distributions from readout PMT were analysed in comparison with dE/dx distributions predicted by GEANT full simulation. Experimental setup of the beam test is described, then procedures of data analysis, Monte Carlo simulation and analysis results are also described.