Highly dispersed nickel nanoparticles on supports such as rice extracted SiO2 , and Activated carbon’s were prepared by impregnation and reductive deposition method by using hydrazine as reducing agent. The high light of this work is to compare the characteristics and activity of the catalysts prepared by both impregnation and reductive deposition method. All catalysts were characterized by various techniques such as BET, SEM, XRD, reduction behavior by using TPR technique. XRD results suggests that all the catalytic systems showing peaks corresponding to the supports as well as metal precursor. Ni/RHSiO2, catalyst prepared by reductive deposition method show excellent conversion of nitrobenzene to aniline. This is due to the presence of higher number of well dispersed surface Ni species than other catalysts as evidenced by SEM studies. TPR results reveal the formation of metallic Ni species in the reductive deposition method.

Here in this paper we report a new series of 1,3,4-thiadiazole based heterocyclic monoazo dyes which have been derived by the diazotization of N4-(5-benzyl-1,3,4-thiadiazol-2-yl)-1,3-thiazole-2,4-diamine with various phenyl pyrazolone as coupling components. The structure of the synthesized dyes was characterized by elemental analysis, IR, 1H NMR and UV spectroscopy with a view to determine their chemical structure. All the synthesized compounds were evaluated for their dyeing performance and fastness properties. The synthesized disperse dyes were found to possess very good dyeing properties.

Ground water is one of the most important natural resources for drinking water. To estimate quality of water in coastal region of Surat district, the study was made by us. Ground water samples were collected from different sampling stations of coastal villages of Olpad and Choryasi talukas of Surat district, Gujarat (India). The samples were collected from 20 different locations and analyzed for physico-chemical properties and different indices were calculated. Seasonal study was carried out for all these stations from May 2015 to April 2016. In this study, The results are compared with water quality standards laid down by ICMR and WHO. The results revealed that some of the samples were having high concentration of salts causing deterioration in quality of drinking water.

The plant Solanum xanthocarpum is widely distributed in the Himalayan (IHR) especially in kumaun Himalayan regions of India. It possess various potential due to its medicinal properties. Based on preliminary reports, there is a lot of interest in using the roots of this plant for treating various disorders in indigenous system of medicine such as antifertility, antipyretic, anticancer, anti-allergy, anti-inflammatory, antihistamine, hypoglycemic, antibacterial, antioxidant, anti-fungal properties. The purpose of work is to study medicinally active substances present in ethanol extract, Aqueous extract and Benzene extract obtained from roots powder of Solanum xanthocarpum. Preliminary Phytochemical screening of the extracts revealed the presence of Alkaloids, Carbohydrates, Phenolic compounds, tannins, Saponins, Steroids and Flavonoids.

A liquid chromatography–tandem mass spectrometry (LC/ESI/MS/MS) method was developed and validated for the determination of ten sulfonamide antibiotic residues in raw shrimp meat: sulfadimethoxine, sulfachloropyridizine, sulfamethoxypyridizine, sulfamethazine, sulfamethizole, sulfamerazine, sulfathiazole, sulfamethoxazole, sulfadiazine, sulfapyridine. The procedure involves the extraction of homogenized sample into acetonitrile and diluted with mobile phase. The analysis was carried out using ODS-EP 5 micron, 100×2.1mm column and mobile phase consists of 0.1% formic acid (A) and acetonitrile (B) in gradient mode at a flow rate of 0.5 mL/min. The final extracts were analyzed by the sensitive and selective LC/ESI/MS/MS operating in positiveion multiple reactions monitoring (MRM) mode.

Spectrophotometric study of oxidation of Palladium(II) chloride catalyzed L- Cysteine in aqueous acetic acid medium has been studied. Present research work focus on effect of various parameters on oxidation of L- Cysteine. Parameters varies during the study of reaction is concentration of L- Cysteine, Palladium(II) chloride and effect of salts on oxidation phenomenon. As a conclusion oxidation reaction was found as first order reaction with respect to L- Cysteine, Palladium(II) chloride and Perchloric acid.