A5002256821- Glass properties and applications
- Chalcogenide Semiconductor Thin Films
- Solid-state spectroscopy and crystallography
- Quantum Dots Synthesis And Properties
- Transition Metal Oxide Nanomaterials
- Crystal Structures and Properties
- X-ray Diffraction in Crystallography
- Spectroscopy and Quantum Chemical Studies
- Crystallization and Solubility Studies
- Photorefractive and Nonlinear Optics
- Luminescence Properties of Advanced Materials
- Advanced Thermoelectric Materials and Devices
- Photochemistry and Electron Transfer Studies
- Garlic and Onion Studies
- Optical and Acousto-Optic Technologies
- Material Dynamics and Properties
- Genomics, phytochemicals, and oxidative stress
- Phase-change materials and chalcogenides
- 2D Materials and Applications
- Selenium in Biological Systems
- Organoselenium and organotellurium chemistry
- Pigment Synthesis and Properties
- Theoretical and Computational Physics
- Lanthanide and Transition Metal Complexes
- Protein Interaction Studies and Fluorescence Analysis
Vanderbilt University Medical Center
2023-2024
University of Calcutta
2017-2020
Indian Association for the Cultivation of Science
1996-2006
University of Kalyani
2004
BACKGROUND: Salt sensitivity of blood pressure (SSBP), characterized by acute changes in with dietary sodium intake, is an independent risk factor for cardiovascular disease and mortality people without hypertension. We previously found that elevated concentration activates antigen-presenting cells (APCs), resulting high pressure, but the mechanisms are unknown. Here, we hypothesized APC-specific JAK2 (Janus kinase 2) through STAT3 (signal transducer activator transcription 3) SMAD3 (small...
Abstract Endothelial cells (ECs) have essential roles in cardiac tissue repair after myocardial infarction (MI). To establish stage-specific and long-term effects of the ischemic injury on ECs, we analyzed their transcriptome at landmark time points MI mice. We found that early EC response Day 2 post-MI centered metabolic changes, acquisition proinflammatory phenotypes, initiation S phase cell cycle, activation stress-response pathways, followed by progression to mitosis (M/G2 phase)...
Nanowires and microfibers of silver have been synthesized by the interaction nitrate (AgNO 3 ) starch employing hydrothermal route in an autoclave at 170 °C for 24 h. Different mor- phological modifications, e.g., microrods spheres to microrods/wires nanoparticles through microwire bundles microfibers, are obtained varying reactant concentrations.
Abstract The anti‐cancer activity of garlic mainly arises due to the presence various organosulfur compounds including diallyl sulfide (DAS), disulfide (DADS) and trisulfide (DATS). Herewith, we report a number 4‐substituted benzyl analogs DADS their selenium counterparts for detailed structure‐activity relationship towards anti‐proliferative activities in human breast cancer cell lines. Disulfide having 4‐cyano group exhibited highest among all disulfides. In contrast, diselenides very good...
Silver selenide (Ag2Se) nanocrystals were synthesized solvothermally using a single source precursor silver selenite (Ag2SeO3) in the presence of dimethyl formamide (DMF) an autoclave. The effect time and temperature on crystalline morphological behavior products was investigated. interaction Ag2SeO3 with DMF resulted formation Ag2Se nanoparticles, whereas mixed solvent few aliphatic alcohols (1:1 (v/v), at 165 °C for 24 h) yielded novel microstructures. combination containing methanol−DMF...
Hydrogen peroxide (H 2 O ) mediated oxidative stress leading to hepatocyte apoptosis plays a pivotal role in the pathophysiology of several chronic liver diseases. This study demonstrates that S-allyl cysteine (SAC) renders cytoprotective effects on H induced damage and HepG2 cells. Cell viability assay showed SAC protected cells from cytotoxicity. Further, treatment dose dependently inhibited via decreasing Bax/Bcl-2 ratio, restoring mitochondrial membrane potential (∆<mml:math...
Abstract The ultrasonic velocity and attenuation in four different samples of the (V2O5)x−(GeO2)1−x glass system (x = 0.5321,0.5816,0.6635 0.7132) have been measured at temperatures between 77 300 K using pulse echo technique 8 MHz. elastic moduli Debye calculated from data for each composition. variations with temperature explained by a model assuming an asymmetric double-well potential having distributions both barrier height asymmetry parameter.
Abstract Tumor necrosis factor‐α (TNF‐α)‐induced keratinocyte inflammation plays a key role in the pathogenesis of multiple inflammatory skin diseases. Here we investigated anti‐inflammatory effect S‐allyl cysteine (SAC) on TNF‐α‐induced HaCaT cells and mechanism behind its potential. SAC was found to inhibit TNF‐α‐stimulated cytokine expression. Further, activation p38, JNK NF‐κB pathways. Interestingly, differentially regulate ERK MAP kinase cells. transient treatment resulted sustained...
The antioxidant capacity inherent to polyphenol-capped gold nanoparticles contributed the inhibition of human serum albumin fibrillation.
The velocity and attenuation of longitudinal transverse ultrasonic waves in (PbO)x–(V2O5)y–(P2O5)1−x−y glass systems different compositions have been measured at temperatures between 80 300 K using the pulse echo overlap technique 10 MHz. For each sample data used to find elastic moduli Debye temperature temperatures. results indicate that for sample, velocities decrease slowly steadily with increasing temperature. dependence has explained terms a thermally activated relaxation process. On...
The results of investigation on the acoustic velocity and attenuation by ultrasonic technique in temperature range from 80 to 300 K lead-vanadate glasses with different compositions have been presented. variation these properties has explained most successfully. dependence can be interpreted terms a thermally activated relaxation process while is combined effect relaxation, anharmonicity, frozen-in fluctuations causing microscopic inhomogeneity elasticity glasses.
Abstract Mixing of 3d and excited orbitals such as 4p, 4d, 4f an ion via crystal field the effect this mixing on orbital moment spin‐orbit coupling coefficient have been discussed for case iron‐group complexes tetrahedral coordination. It has shown that admixture to effectively reduces S—O with respect values corresponding pure orbitals. These reductions estimated different ions coordination within framework theory. The reduction is found be larger than moment. inferred in some due metal may...
The effect of excited configurations 3d54p, 3d54d, and 3d54f on the crystal field levels Γ3 Γ5 tetrahedral octahedral Fe2+ ion via interaction has been discussed. shift due to configuration estimated in two cases within framework model carrying out perturbation calculation up second order using Slater functions for radial integrals. Such shows that case ZnS, net spectra is close by an appreciable amount about 1000 cm−1 major part contribution comes from 3d54p. In also (Fe2+ MgO), arising...
Abstract The tetrahedral crystal field acting on the F‐state ion Ni 2+ in ZnO mixes odd parity states of excited 3d 7 4p and 4f configurations with even 8 configuration this mixing has some contribution to intensity electric dipole transition between levels. such interaction oscillator strength for transitions from lowest level T 1 higher ones is estimated within framework theory using powerful Racah method Richardson function radial integrals. results indicate that quite significant; it...
We study the ultrasonic properties of five different samples Na2O-Li2O-TeO2 glass system within temperature range 140–420 K (for longitudinal polarization) and 140–300 transverse polarization). The variation velocity all shows negative gradient with has been explained by existing theories. No well defined broad peak observed in attenuation a mixed alkali type starts growing at ≈350 K. Composition dependence elastic density maximum or minimum critical concentration Na2O. Optical transmission...
The effect of configuration interaction on the crystal-field splitting tetrahedral ${\mathrm{Cr}}^{2+}$ ion via crystal field and residual that occurs in formalism central-field approximation have been discussed within framework theory using Richardson functions for radial integrals. A simplified method which can replace laborious adopted earlier calculation alone has indicated. In addition to well-known mechanism another involving combined action aforesaid it is found latter no way less...