etd AT Indian Institute of Science: Recent submissions
Now showing items 401-420 of 9468
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Biosynthesis of indole alkaloids in the higher plant catharanthus roseus : is cytochrome b5 system involved in the cytochrome p-450 mediated geraniol hydrixylation
Biosynthesis of Indole Alkaloids in the Higher Plant Catharanthus roseus: Is Cytochrome b System Involved in the Cytochrome P 450–Mediated Geraniol Hydroxylation ” Indole alkaloids belong to a large family of structurally ... -
Stereochemical investigations in chiral etyhl esters
The thesis entitled “Stereochemical Investigations in Chiral Ethyl Esters” attempts to interpret differences in the magnitudes of anisochrony of the O methylene protons of ethyl ester groups located in various chiral ... -
Investigation towards the total synthesis of b-secosteroids
The thesis entitled “Investigations Towards the Total Synthesis of B Secosteroids” consists of two parts. Part I describes: the synthesis of a few mono and dimethoxy 5/8 seco 5/7 bisnor steroids (Chapter I), and a study ... -
studies in terpenoids and lachnanthocarpones
The thesis entitled “Synthetic Studies in Terpenoids and Lachnanthocarpones” is divided into two parts and consists of five chapters. Chapters 1–3 constitute Part I, and Chapters 4–5 are included in Part II. Chapter 1 The ... -
studies in terpenoids and vilsmeir formylation on some
The thesis entitled “Synthetic Studies in Terpenoids and Vilsmeier Formylation on Some Hydronaphthalene Systems” consists of five chapters dealing with: a review, for the first time, of the chemistry of vetivalene type ... -
Studies in natural products,Pt.1 & 2
Part I: Investigations on the Essential Oil of Ageratum conyzoides After briefly surveying the earlier work carried out on the essential oil of Ageratum conyzoides, the present investigation on this oil has been described. ... -
Topics in organic stereochemistry : studies in optical resolutions
The thesis entitled “Topics in Organic Stereochemistry: Studies in Optical Resolutions” describes, in four chapters, investigations aimed at: (i) developing methodologies for the resolution of racemic alcohols both kinetically ... -
Part-1: Studies in Sesquiterpenses. Part- Organic reractions with Polyphosphoric Acid
Abstract not available -
Catalytic Organic Transformations with nanostructured metals, alloys and metal Oxides, mesoporous MCM-41 supported metal oxide and Organic-inorganic hybrid materials
Chapter 1 Chapter 1 presents a general introduction to porous materials and, in particular, mesoporous materials. The mechanism of formation of MCM 41 involves supramolecular self assembly of surfactants (e.g., CTAB). ... -
Low-pressure mocvd of oxide dielectrics : a study of their growth, microstructure, and properties
Abstract not available -
Polysaccharide-based investigations into the surface chemistry of some sulphide and hydrophobic minerals and processing of a complex sulphide ore
The gradual depletion of high grade ores and the fine dissemination of values, together with the complex mineralogy of lean grade samples, has made it imperative to develop innovative technologies for their processing. The ... -
Kinetics of size reduction and associated wear of grinding media
Ball milling is an important step in mineral processing to liberate the locked minerals from ore. During milling, the media undergo extensive wear due to abrasion and impact. Corrosion acts synergistically to increase the ... -
Analytical And Experimental Studies On Effect Of Bends In Engine Manifolds On The Gas Exchange Phenomena
Factors which influence the gas?exchange processes are numerous and inter?related in a complex manner. In the analytical formulations proposed by earlier investigators to examine gas?exchange phenomena, the inlet and exhaust ... -
Transonic flow in a rotating turbine cascade of large pitch to chord ratio.
A rotating turbine cascade was designed to simulate the nearly two dimensional flow past a flat plate turbine cascade of large pitch to chord ratio. The turbine was tested in the transonic flow range for flow incidence ... -
Analysis of heat transfer in the forehearth in glass melting.
This work is a computational study of the interaction between conductive, convective, and radiative modes of heat?transfer phenomena in molten glass as it flows through the forehearth unit in a glass tank furnace. Since ... -
Investigation of a mixed flow immpeller.
Investigations have been conducted on a mixed?flow impeller to provide basic information for use in the design of high?specific?speed pumps. Such pumps are widely used for cooling?water duties in thermal power stations in ... -
Experimental and numerical investigation of localized necking in aluminium alloy tubes during hydroforming
Metal forming is an important technological operation in manufacturing, particularly in the automotive industry. Several components are shaped by sheet?metal forming, tube hydroforming, and bending processes. With advancements ... -
Mechanics and Mechanisams in Fretting Damage for Stainless Steel and Chromium Carbide Coatings
Fretting is of serious concern in many industrial components, especially in the nuclear industry, for the safe and reliable operation of various components and systems. Although considerable efforts have been made to ... -
Casing boundary layers in a multistage axial compressor
The casing boundary layers strongly influence the performance of axial?flow compressors. Computational theories exist for calculating casing?wall boundary?layer growth, and although they are relatively successful in helping ...