Chopra

Shanthi E, Dutta V, Baneqee A and Chopra K L 1980 Electrical and optical properties of undoped and antimony-doped tin oxide films J. Appi. Rhys. 51 6243-51... 

Bockrath M, Cobden D H, McEuen P L, Chopra N G, Zettl A, Thess A and Smalley R E 1997 Single-electron transport in ropes of nanotubes Science 275 1922-5. 

Chopra, Proceedings of the S ociety of Photo-Optical Instrumentation Engineers (Smart Structures and Materials 1996—Smart Structures and Integrated Systems) Proceedings of the Conference, San Diego, Calif., Feb. 26—29, 1996) 2717, 20—26, (1996). 

A. K. Jaia and S.. Chopra ia X. Chou, ed.. Proceedings of an International Conference on Petroleum Refining and Petrochemical Processing, International Academic PubHshers, Beijing, China, 1991, pp. 368—374. 

A. D. Russell and 1. Chopra, DnderslandingMntibacterialMction and Resistance, Ellis Horwood, New York, 1990. 

On the broad subject of thin films generally, a well-regarded early text is by an Indian physicist, Chopra (1969), while a very broad, didactic treatment of thin films in all their aspects is by Ohring (1992). A recent survey of the effect of structure on properties of thin films relevant to microelectronics is by Machlin (1998). 

Chopra, K.L. (1969) Thin Film Phenomena (McGraw-Hill, New York). 

Slfinrnnianini , C14H13O4N. This alkaloid was first isolated from the leaves oi Skimmia japonica Thunb. by Honda, and later from S, laureola Hook by Chopra et It has also been recorded from Fagara spp. 

The crude drug, Adhatoda vasica, is used in India as a remedy for asthma. According to Chopra, vasicine produces broncho-dilation and might be used clinically as an expectorant. A detailed pharmacological examination of peganine in comparison with harmine has been made by Tutaev and Makarova. ... 

Ephedrine also oeeurs in the leaves of the yew tree [Taxus baccata) and in Sida rhombifolia Linn, whilst Stockman s cathine from Catha edulis Forsk has been shown by Wolfes to be d-nor- -ephedrine. Ghosh, Chopra and Dutt state that the bark of Moringa pterygosperma Gaertn. contains two alkaloids similar to ephedrine in pharmacological action. The more active of the two, moringinine, is amorphous the other is a liquid but jdelds a crystalline hydrochloride, C,H. HCl, m.p. 254-4°, + 1-8°, a picrate, m.p. 195°, and an aurichloride, m.p. 170-8°. 

The total alkaloidal eontent of Ephedra varies widely, being influeneed by the speeies eolleeted and the seasonal and environmental eonditions, as has been shown by Read and by Chopra and their eolleagues. For speeially eolleeted material yields as high as 2- 56 per cent., of which 1- 8 per cent, is ephedrine, have been recorded, but about 1 per cent, of total alkaloids is not usually exceeded in the commercial product. 

Inula royleana D.C. According to Chopra, Kohli and Handa, this plant contains about 3 per cent, of an alkaloid, royline, C2iH3gOgN, m.p. 120-1°, — 42-5° aurichloride, m.p. 142° (dec.). The base produces... 

Fig. 7.69 Thermochemical stability diagram for the 310 stainless-steel-S-O system at 750°C (from Gray and Starr after Natesan and Chopra ")...

Natason, K. and Chopra, O. K., First Int. Conf. on Materials for Coal Conversion and Utilisation, Gaithersburg, Maryland, II (1976)... 

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