The ion solvent interaction of BaCl₂ and BaBr₂ in methanol + water and ethanol + water at 10, 20 and 30% (w/w) within the temperature range of 30° - 40° C have been inferred from conductance data. The dissociation constant K , DG°_t and DG°_t (el) have been computed and the ion solvent interactions have been studied.

Some new 2'[1aminomethyl{Nalkyl phthalyl benzimidazolo}]5'(2''/4''/3''/5''phenyl substituted)1',3',4'thiadiazoles have been synthesized from the Mannich base of Nalkyl phthalyl benzimidazoles (1). The Mannich base was converted to thiosemicarbazide (2) by reacting with carbon disulphide and subsequently hydrazinolysing it with hydrazine hydrate. The substituted thiosemicarbazides were then cyclized in presence of appropriate aromatic carboxylic acids under anhydrous conditions yielding the benzimidazole substituted thiadiazole derivatives (3). Chemical structures were elucidated by the spectral technique of IR, ¹HNMR and Mass. The compounds when screened for their insecticidal activity against Tribolium castaneum increased the percentage mortility of the insects.

Schiff base 2-{[(2-aminophenyl)imino] methyl} phenol was synthesized from O-phynelendiamine and salicyldehyde. Metal Complexes of Cr(VI) and Fe(III) were synthesized from Schiff base and metformin. The synthesized transition metal complexes were characterized by elemental analyses, conductance and magnetic susceptibility measurements, as well as spectroscopic (IR, electronic) and thermal studies. IR spectral studies revealed the existence of the ligands in the amine form in the solid state. The magnetic and electronic spectral studies suggest an octahedral geometry for all the complexes. The metformin acts as a bidentate ligand and Schiff base of O-phynelendiamine and salicyldehyde acts as a tridentate ligand. Antimicrobial screening of the Schiff base, ligand and transition metal complexes were determined against the bacteria Escherichia coli and Bacillus megaterium.

Analysis of Physico-chemical parameters and study of the growth of Plankton was conducted in Sarangpani lake Bhopal. It was observed that in Rainy and winter season Volvacales and chlorococalas flourished abundantly while in summer and winter growth of cyanophycaea and Bacillariophyceae were found in large quantity. Rainy season is favourable for the growth of euglenophyceae. Correlation study also conducted to correlate different Physico-chemical parameters with the presence of different species of Phytoplanktons.

The induced oxidation of Ce (III) is carried out in presence of As (III) using KMnO₄. The induction factor, that is the ratio of oxidation equivalent consumed by the equivalent of acceptor and the inductor, is determined under varied experimental conditions. The inductor factor (1.55) indicates the involvement of Mn (V) as reactive intermediate. The probable mechanism based on induction factor is suggested. It was concluded that As (III) titration with KMnO₄ gets influenced by the presence of trace amount of CeCl₃. The effect of added salt on induction has been studied.

The present study was carried out to assess the effect of oil extracted from Bulma Cotton (Bombacopsis glabra) seed on the growth and activities of some enzymes in some tissues of rats. Three weeks old male white albino rats (Rattus norvegicus) were divided into two groups and fed with two different diets for four weeks. The difference in the diets was 5% soyabean oil (control) or 5% Bulma cotton seed oil. The average increase in weight of the test rats was not significant (P<0.05) when compared with the average increase in weight of the control rats. The activities of the enzymes: acid and alkaline phosphatases, alanine and aspartate transaminases in the organs (liver, kidney, brain) of the test rats were not significantly different compared with the control. The results strongly suggest the B. glabra seed oil supports the growth of rats and it appears that the structural integrity of the cell was preserved in the tissues studied.

Many factories have been put up in Mandideep & Govindpura. These areas were chosen to study and assess the impact of heavy metals like Iron, Chromium, Manganese, Cobalt, Zinc and Cadmium in causing chemical pollution. Samples were collected from August 2008 to January 2010. Atomic absorption spectrophotometric analysis of non-filterable residue of surfacial sediments for the heavy metals were made. The fractionation analysis of the sediments for metals in four important phases, like the adsorbed and/or ion exchangeable, oxide coating, organic solids and crystalline phases were carried out. Total metal's concentration was also determined.

The aim of the present study is to evaluate various biological activities like antimicrobial, in vitro bovine serum denaturation activity, antioxidant activity for novel substituted fluoro nitro benzothiazolo thioureas. The role of benzothiazole as antitumor agents is well established. The introduction of nitro and fluoro substitution is known to enhance biological activity. Herein, we propose synthesis of some novel compounds for evaluation of various activities.

Crude oil and its different fractions constitute a class of soil pollutants. Under certain conditions, living microorganisms can alter and / or metabolize various classes of compounds present in it, a set of processes collectively called oil biodegradation. This degradation is a process of oxidation which is limited by availability of nutrients and several other factors. In the present experiment, extent of degradation of hydrocarbons of a diesel oil sample was determined in a 90 days experiment gravimetrically by applying it on a soil sample with no past history of oil pollution. Hydrogen Peroxide was applied in one sample. The recovered oils were subjected to GC analysis under identical condition using same column. 25 common peaks have been identified indicating their persistency under the two different conditions.