Tetraaza Macrocyclic complexes of transition metals of Ni (II), Cu(II), Cr(III), Fe(III), Mn(II) were synthesized in methanolic media by template method. The complexes were characterized by elemental analysis, UVVis, Infrared spectroscopy. In vitro antibacterial activity of macrocyclic complexes against five bacteria i.e. Streptococcus mutans, Escherichia coli, Staphylococcus aureus, Streptococ...

The EPR and UV-VIS spectroscopy was used to determine the pH effect on bovine liver catalase. The measurements were made in the pH range from 2 to 10. The positions, shapes and relative intensities of the UVVIS peaks were observed. Spin labelling technique was used to monitor the molecular dynamics of catalase. Treatment with acid or alkaline solutions causes spectral changes which may be due t...

The objectives of this study were to characterize a synthesis brom-isoflavanone (notated IF) with possible pharmacological activities, water insoluble and to examine the potential of beta-cyclodextrin to improve this property and obtain inclusion compounds that were analysed by different techniques: UV-Vis, IR, 1HNMR spectroscopy, thermal analysis. The presence of β-cyclodextrin rises the conte...

[1] We have successfully characterized the Clementine HIRES multispectral sensor entirely from inflight measurements. Relative calibration is obtained through dark subtraction (additive) and sensor spatial nonuniformity (multiplicative) on a pixel-by-pixel basis. Relative residuals from frame-to-frame are typically less than 1%. Absolute coefficients are obtained through comparisons with calibr...

Vacuum evaporated films of GexSe80-xPb20 have been characterized by using optical spectroscopy (especially transmission and absorption spectra). The chalcogenide glass of GexSe80-xPb20 has been prepared by melt quenching technique. Thin films of GexSe80-xPb20 are deposited by vacuum thermal evaporation technique on highly clean glass substrates and their optical properties such as refractive in...

Bio-chemical reduction method was employed to synthesise the silver nanoparticles (Ag NPs) by aging the mixture of the aqueous extract of the Trachyspermum Ammi (TA, Ajwain) seeds and AgNO3 solution at different time interval. Reaction time of AgNO3 and TA could accelerate the reduction rate of Ag and affect AgNPs size and concentration of NPs. X-ray diffraction (XRD) studies confirms the forma...

Introduction: Lunar basalts exhibit obvious variations in ultraviolet-visible (UVVIS) color and these variations have been attributed to Ti content [1], the major compositional variable in mare basalts. Charette [2] first showed that Ti content in lunar samples is correlated with telescopic measurements of UVVIS ratio in mature (agglutinate rich) basaltic regolith, whereby samples with high TiO...

The metallic nanoparticles have great attention of Chemists, Physists, Biologists and Engineers who wish to use them for development of new generation nanodevices. In this present study silver nanoparticles were synthesized from aqueous silver nitrate (1mM) through a simple and ecofriendly route using leaf broth of Ocimum sanctum as reductant and stabilizer. The aqueous silver ions when exposed...

In this paper we have reported the biosynthesis of silver nanoparticles using Penicillium sp. was isolated from the soil sample collected from Pallavakam beach of Chennai, Tamil Nadu India. When the fungal biomass was challenged with 1mM Silver nitrate (AgNO3) results in the change of solution color in to dark brown shows the formation of Silver nanoparticles(SNP).These Silver nanoparticles wer...