Pharmacognostic and Physico chemical standardization of Cinchona officinalis Linn.f

 Cinchona officinalis Linn.f. is commonly known as Crown bark in English belongs to family Rubiaceae. Stem bark of C. officinalis have profound application in homeopathy. Aim of the present study is to standardizing C. Officinalis mother tinctures by taking from three different sources [Dr.D.P.Rastogi, CRI (H) Noida (A), two from market (B, C)] for pharmacognostic, physio chemical studies and comparative analysis for authentication of drug

Interlayer Oxidation Via Pores In Multilayer Metallic Films: Ag/pd/ti/(111) Si

Corrosion of the titanium layer in a multimetallization silicon solar cell contact was characterized using scanning electron microscopy, electron microprobe analysis and Auger electron spectroscopy. The corrosion product is titanium oxide. The oxidizing agent(s) obtain(s) access to the inner titanium layer through pores in the outer silver layer. Solar cells that had been subjected to accelerated aging tests (high temperature and high humidity) as well as untested cells were examined. More net oxygen was found in the tested cells. The titanium oxide is inhomogeneous because it is localized at pores and distributed exponentially in depth (into the titanium layer). © 1981.7814965Buck, III, Leidheisher, Jr., (1958) Nature (London), 181, p. 1681Stern, Wissenberg, The Influence of Noble Metal Alloy Additions on the Electrochemical and Corrosion Behavior of Titanium (1959) Journal of The Electrochemical Society, 106, p. 759Fischer, Gareth, (1968) Proc. 7th Photovoltaic Specialists' Conf., p. 214. , November, 1968, IEEE, New YorkEnglish, Turner, (1972) J. Electron. Mater., 1, p. 1Speight, Cooper, (1975) Thin Solid Films, 25, p. 531Sharp, (1979) J. Vac. Sci. Technol., 16, p. 204Becker, Pollack, (1970) Proc. 8th Photovoltaic Specialists' Conf., p. 40. , 1970, IEEE, New YorkSpeight, Bill, (1973) Thin Solid Films, 15, p. 32