Physics (PHY): Recent submissions
Now showing items 641-660 of 672
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High Precision Optical Frequency Metrology
(2009-07-22)Precise measurements of both absolute frequencies and small frequency differences of atomic energy levels have played an important role in the development of physics. For example, high precision measurements of absolute ... -
Crystal Structure Of Abrus Precatorius Agglutinin-I (APA-I) : Insights Into The Reduced Toxicity Of APA-I In Relation To Abrin. Formation Of Ordered Nanotubes Through Self Assembly In The Crystal Structures Of Dipeptides Containing α. β-dehydrophenylalanine
(2009-07-22)Ribosome Inactivating Proteins (RIPs) are protein or glycoprotein toxins that bring about the arrest of protein synthesis by directly interacting with and inactivating the ribosomes. Such toxins are in general, of plant ... -
Contributions To Venominformatics : Sequence-Structure-Function Studies Of Toxins From Marine Cone Snails. Application Of Order-Statistics Filters For Detecting Membrane-Spanning Helices
(2009-07-21)Venomous animals have evolved a vast array of peptide toxins for prey capture and defense. Nature has evolved the venoms into a huge library of active molecules with high selectivity and affinity, which could be explored ... -
Theoretical Study Of Some Transport And Spectroscopic Phenomena In Two Materials Showing Large Magnetoresistance
(2009-07-09)In this thesis I present studies of some transport and spectroscopic properties for two di erent materials exhibiting large magnetoresistance. Both of these materials are oxides of transition metals, showing exotic magnetic ... -
Growth, Transport, Magnetic And Thermal Studies On Single Crystals Of Pr1-xPbxMnO3
(2009-06-17)Mixed valence manganites with the perovskite structure R1-xAxMnO3 (where R = La, Nd, Pr and A = Ba, Ca, Sr, Pb) have been a popular subject of contemporary research because of their interesting physical properties such as ... -
X-Ray Crystallographic Studies Of Designed Peptides And Protected Omega Amino Acids : Structure, Conformation, Aggregation And Aromatic Interactions
(2009-05-18)Peptides have assumed considerable importance in pharmaceutical industry and vaccine research. Understanding the structural features of these peptide molecules can be effective not only in mimicking natural proteins but ... -
Electrical And Magnetic Properties Of Polyvinylchloride - Amorphous Carbon / Iron Carbide Nanoparticle Comosites
(2009-05-18)The UV-Visible spectra of a-C composites and nano composites have provided a very useful information about the electronic states and band structure. The UV-Visible spectra of a-C as well as nanoparticle are qualitatively ... -
Quantum Algorithms Using Nuclear Magnetic Resonance Quantum Information Processor
(2009-05-12)The present work, briefly described below, consists of implementation of several quantum algorithms in an NMR Quantum Information Processor. Game theory gives us mathematical tools to analyze situations of conflict between ... -
Studies On Photoinduced Interdiffusion In Se/ As2S3 And Bi/As2S3 Nanolayered Films
(2009-04-30)Availability of amorphous semiconductors in the form of high quality multilayers provide potential applications in the field of micro- and optoelectronics. Although the misfit problems in amorphous multilayers (AML) are ... -
Quantum Information Processing By NMR : Relaxation Of Pseudo Pure States, Geometric Phases And Algorithms
(2009-04-13)This thesis focuses on two aspects of Quantum Information Processing (QIP) and contains experimental implementation by Nuclear Magnetic Resonance (NMR) spectroscopy. The two aspects are: (i) development of novel methodologies ... -
Studies Of Phosphorus-Functionalized Calix[4]arenes And Their Palladium Complexes
(2009-03-31)Calixarenes, particularly calix[4]arenes, continue to attract considerable attention in synthetic chemistry, notably as platforms for designing sophisticated molecular cages and claw-like ligands. Incorporation of phosphorus ... -
Theoretical Investigation Of Relativistic Effects In Heavy Atoms And Polar Molecules
(2009-03-20)Extensive theoretical studies on the ground and excited state properties of systems containing heavy atoms have shown that accurate prediction of transition energies and related properties requires the incorporation of ... -
Resistance Fluctuations And Instability In Metal Nanowires
(2009-03-13)The principal aim of this thesis is to study the electrical transport properties of metal nanowires. Specifically, we have focussed on investigating the resistance fluctuations of Ag and Cu nanowires of diameters ranging ... -
Theoretical Investigations Of Core-Level Spectroscopies In Strongly Correlated Systems
(2009-03-11)Ever since the discovery of exotic phenomena like high temperature (Tc) superconductivity in the cuprates and colossal magnetoresistance in the manganites, strongly correlated electron systems have become the center of ... -
X-ray Crystallographic Studies Of Designed Peptides, Self Assembling Pseudopeptides And Molecular Modeling
(2009-03-04)Structural studies of peptides has relevance for various applications, like, in de novo design of proteins, in designing better catalysts for organic synthesis, in structure based drug design, in the design and construction ... -
Nature Of Criticality, Structuring, And Phase Behavior Of Complex Fluids
(2009-03-04)This thesis is mainly concerned with some important properties of complex fluids, and how these properties are influenced by structures in the nano/mesoscopic scale. Short-range assembly of the constituent molecules results ... -
Thermal Fluctuation Spectroscopy And Its Application In The Study Of Biomolecules
(2009-03-03)The aim of this thesis is to study the energy fluctuations (leading to thermal fluctuations) during thermal and enzymatic denaturation of biological molecules and to study the variation in fluctuations between simple ... -
A Radio Study Of Gas Loss Processes In Nearby Galaxies
(2008-10-17)The work in this thesis involves detailed multi-frequency radio continuum (from 325 MHz to 15 GHz) and Hi spectroscopic studies of a few represent tative nearby galaxies which are experiencing gas-loss from their disks ... -
Soft Matter : Routes To Rheochaos, Anomalous Diffusion And Mesh Phases
(2008-10-06)Soft condensed matter (SCM) systems are ubiquitous in nature. SCM systems contain mesoscopic structures in the size range 10 nm to 1 am that are held together by weak entropic forces. These materials are therefore easily ... -
Growth And Characterization Of Technologically Important Nonlinear Optical Crystals: Cesium Lithium Borate And Potassium Di-Deuterium Phosphate
(2008-09-30)Present day advanced technologies heavily rely on one particular class of matter, i.e. the crystals. It is the periodic nature of the atoms and the properties arising due to the periodicity in crystals that is exploited ...