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Antiulcerogenic Activity of Scoparone on HCl/Ethanol-induced Gastritis in Rats
Won Sik Choi,Do Yoen Jang,Seok-Woo Nam,Byeoung Soo Park,이회선,Sung Eun Lee 한국응용생명화학회 2012 Applied Biological Chemistry (Appl Biol Chem) Vol.55 No.2
Protective effect of ethanol extract from Hericium erinaceus cultivated with Artemisia capillaries (HEAC) on gastric mucosal damage induced by 0.15M HCl in ethanol in rats was evaluated. HEAC showed higher potent protective effect on gastritis with effective dose 50 (ED50) value of 22.6mg/kg compared those of selbex and stillen at 46.5 and 44.2 mg/kg, respectively,the presently used medicines for treating gastritis. ichloromethane fraction showed a dose-dependent protective effect on gastritis with ED50 value of 18.1 mg/kg. The biologically active component of dichloromethane fraction derived from HEAC ethanolic extract was characterized by spectroscopic analysis as scoparone with protective rate of 93% and ED50 value of 4.2 mg/kg on gastritis. Taken together, administration of HEAC and scoparone provided protective effect on the gastric lesion induced by ethanol-HCl and may therefore be a promising drug for treatment of gastritis and gastric ulcer.
Superelasticity and Corrosion Behavior of 50Ti–(45-X)Ni–5Cu–XMo (at.%) Alloys
Nam, Tae-Hyun,Jung, Dae-Won,Kim, Jae-Hoon,Liu, Yinong,Kim, Ki-Won,Jeong, Sang-Sik Sage Publications 2006 Journal of intelligent material systems and struct Vol.17 No.12
<P>In this study superelasticity and corrosion characteristics of 50Ti–(45-X)Ni–5Cu–XMo alloys have been investigated by means of electrical resistivity measurements, X-ray diffraction, tensile tests, polarization tests, and optical microscopy. Substitution of Mo for Ni in a Ti–45Ni–5Cu alloy induces the B2–B19 transformation and the stability of the B19 martensite increases with an increase in Mo content. Superelastic recovery of 50Ti–(45-X)Ni– 5Cu–XMo alloys increases from 33 to 91% with an increase in Mo-content from 0 to 0.5%. The 50Ti–(45-X)Ni–5Cu–XMo alloys show small stress hysteresis below 100 MPa. The pitting potential of 50Ti–(45-X)Ni–5Cu–XMo alloys also increases with the increase in Mo content.</P>