etd AT Indian Institute of Science: Recent submissions
Now showing items 21-40 of 9468
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Growth and characterisation of Indium antimonide and its heterosturctures
In conclusion, InSboriented layers have been grown on InSb and GaAs by LPE. While stepcooling yielded good homoepitaxial layers, it was necessary to use the rampcooling technique to grow InSb on GaAs. The narrow rockingcurve ... -
Studies on selected semiorganic and organic nonlinear optical crystals
Good opticalquality LAP and dLAP crystals were grown from aqueous solutions by solvent evaporation and slow cooling. Problems associated with crystal growth, such as microbial growth in the solution, were systematically ... -
Electriacl and theramal studies on metal doped germanium telluride glasses
Cu-Ge-Te Glasses (i) Bulk, meltquenched CuGeTe glasses are found to exhibit a single glass transition and a singlestage crystallization upon heating. (ii) The composition dependence of the glasstransition temperature, ... -
Crystal growth and characterization of some nonlinear optical materials
Single crystals of LAP were grown from aqueous solution under different growth conditions. The undesirable growth of microorganisms was avoided by protecting the surface of the solution by placing a thick layer of nhexane ... -
White dwarf pulsators-a study with the whole earth telescope
We have presented in this thesis the first observational results on the location of the driving region and the processes involved in white dwarf pulsations. We selected one object from each of the three main instability ... -
Experimental investigations on the structure and transport properties of amorphous and nano-crystalline carbon nitride
In this chapter, we summarize our results and present concluding remarks on our investigations. Key findings on amorphous carbon nitride are followed by results on crystalline carbon nitride. Carbon and its allotropes ... -
Investigations on the radioactivity and the geological ages of indian rocks & minerals
Abstract Not Available -
Studies in sympathomimetics
After a historical account of the development of the knowledge of sympathomimetic drugs-from the discovery by Oliver and Schäfer of the blood pressure raising property of extracts of the adrenal gland, to the enunciation ... -
Biotransformation of terpenoids in rats : studies on the pulmonary mixed function oxidase systems
Metabolic fate of natural products in mammals has been of interest since the beginning of this century. Terpenoids, one of the largest groups of naturally occurring compounds, are components of many commonly used food ... -
Metabolism of L Phenylalanine and Tyrosine
Rhizoctonia solani employs two pathways, viz., phenylpyruvate pathway and cinnamate pathway, to degrade L-phenylalanine. The intermediates in the phenylpyruvate pathway are phenylacetate, o-hydroxyphenylacetate, and ... -
Synthetic investigation in streoids and terpenes
The thesis entitled “Synthetic Investigations in Steroids and Terpenes” consists of three chapters and a short appendix. Chapter I contains a brief review of the course of Dieckmann cyclisation of 2 alkyl and 2 alkoxycarbonyl ... -
studies in essential oils
The thesis consists of three parts. The first part deals with the synthesis of three alkyl azulenes. The second part deals with the analysis of the essential oil from the roots of Aristolochia indica. The third part deals ... -
Synthetic studies in todomatuic acids Juvabiones and analogues
By the hydrolysis of the oil derived from Abies sachalinensis Mast., Tuchihashi and Hanzawa (1940) isolated a sesquiterpene acid called todomatuic acid, and its structure, deduced by Momose (1941), was confirmed by Nakazaki ... -
Synthetic investigation on sterioids A & B
The thesis entitled “Synthetic Investigations on Steroids” consists of two sections, A and B. Section A, dealing with the Investigations on a new route to oestrone, is subdivided into two chapters. In Chapter 1, following ... -
Studies in synthetic drugs
The thesis consists of three parts, preceded by a general introduction to the malaria problem. Introduction In the introduction, the various aspects of the malaria problem have been dealt with, namely: the incidence of ... -
Studies on C -seco limonoids (tetranortriterpenes) from Azadirachta indica A. Juss: a) Isolation and characterization of new C -seco limonoids b) Functionalization of salannin and azadirachtin using Nocardia sp. c) Elucidation of pathways for biotransformation and structural specificity of the organism
a) Isolation and characterization of new C seco limonoids b) Functionalization of salannin and azadirachtin using Nocardia sp. c) Elucidation of pathways for biotransformation and structural specificity of the organism The ...