Government Institute of Science

India

Government Institute of Science

India
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Lambat T.,Government Institute of Science | Deo S.,Government Institute of Science | Deshmukh T.,Government Institute of Science
Journal of Chemical and Pharmaceutical Research | Year: 2014

A Facile and efficient one pot, four component synthesis of polyhydroquinoline derivatives via the Hantzsch condensation reaction using sulphamic acid as heterogeneous catalyst by green approach is described herein. The present methodology offers several advantages such as Excellent yields, economy of cost and time, absence of side products and operational simplicity, ecofriendly, recyclability and reusability of the catalyst are some of the salient features of this reaction.


Thakare S.R.,Government Institute of Science | Ramteke S.M.,Government Institute of Science
Catalysis Communications | Year: 2017

Ag@MOF-5 was fabricated successfully and used as a photocatalyst for the disinfection of water containing E. coli bacteria as a representative biological material. The compound was characterized by using various techniques like SEM, TEM, FTIR, XRD, UV–Visible spectrophotometry and Raman analysis. Ag@MOF-5 showed a rapid inactivation of > 91% bacteria in only 70 min of time under visible light irradiation. Silver nanoparticles play dual role as light absorbers as well as to assist electron capture center and catalyse the reactive oxygen species production reactions. The results shows that Ag@MOF-5 has very good photo-catalytic disinfection activity on E. coli infected water. © 2017 Elsevier B.V.


Lavania M.,TLM Community Hospital | Jadhav R.S.,Government Institute of Science | Turankar R.P.,TLM Community Hospital | Chaitanya V.S.,TLM Community Hospital | And 2 more authors.
Clinical Microbiology and Infection | Year: 2013

Earlier studies indicate that genotyping of Mycobaterium leprae based on single-nucleotide polymorphisms (SNPs) is useful for analysis of the global spread of leprosy. In the present study, we investigated the diversity of M. leprae at eight SNP loci using 180 clinical isolates obtained from patients with leprosy residing mainly in Delhi and Purulia (West Bengal) regions. It was observed that the frequency of SNP type 1 and subtype D was most predominant in the Indian population. Further, the SNP type 2 subtype E was noted only from East Delhi region and SNP type 2 subtype G was noted only from the nearby areas of Hoogly district of West Bengal. These results indicate the occurrence of focal transmission of M. leprae infection and demonstrate that analysis by SNP typing has great potential to help researchers in understanding the transmission of M. leprae infection in the community. © 2013 European Society of Clinical Microbiology and Infectious Diseases.


Lihitkar S.R.,Rashtrasant Tukadoji Maharaj Nagpur University | Lihitkar R.S.,Government Institute of Science
Library Hi Tech News | Year: 2014

Purpose: The purpose of this paper is to know the institutions who are developing electronic theses and dissertations (ETDs) in India, and to compare the ETDs in India based on a predetermined parameter. Design/methodology/approach: The methodology used for this research paper was a descriptive method. The institutional web sites were browsed and searched to collect the data. A relevant literature review was also carried out to describe the current status and other relevant information. Findings: Institutional repositories are a concept gaining movement today. India is moving ahead in this direction and major education and research institutes have already created their own institutional repositories. In analysis and findings, a detailed report of the analysis of data collection and its subsequent interpretations are given. Practical implications: If anybody would like to develop ETDs they can this overview of all the previous developed ETDs in India. It will be helpful for planning, developing and implementing new ETDs. Originality/value: This type of research study has not made till now. It is very important to study current and different types of ETD projects in India and its status. The study of special subject repositories is important for the students, scholars and researchers as well as for the LIS professionals. © Emerald Group Publishing Limited.


Pethkar A.V.,Government Institute of Science | Bhagat A.P.,KTHM College
Materials Science Forum | Year: 2013

India is one of the largest producer and exporter of dyestuff among developing countries. Large amount of dyes is lost in industrial effluents during production and industrial use. Persistence of dyes in the environment, their non-biodegradability and toxicity necessitate urgent steps to develop environment-friendly approaches to remove them from wastewaters. The present work describes attempts to use iron-based catalytic nanoparticles (NPs) for removal and degradation of Acid Black 1, one of the notoriously toxic dyes. A rapid screening assay was developed in order to select NPs possessing reducing properties. Methylene blue (MB) dye (0.1mg/L, 250μl) was exposed to different preparations of NPs (7mg) for 30 minute in a 96-well microtiter plate and read at 630 nm using an ELISA reader. Iron sulphide nanoparticles (FeSNPs) stabilized by a plant biopolymer (BP) could remove >95% MB and were selected for further studies. The FeSNPs could remove Acid Black 1 efficiently (73.8%) with specific dye removal capacity of 19.7 mg/g NPs. FeSNPs were immobilized in alginate beads (average diameter 3.45 mm) and packed in polypropylene columns (22.5 cm long, 3 cm i.d.) having bed volume of 42 ml. Acid black 1 solution (20 mg/L) was passed through the columns at predetermined flow rates in up-flow mode using peristaltic pump. The mass transfer kinetics were favourable at a flow rate of 2.2 ml/min (mass transfer coefficient 9.38×10-5 L.mg-1.min-1), and 120 bed volumes of the solution could be treated with efficiency exceeding 90%. Analysis of column effluent by UV-visible and FTIR spectroscopy revealed that removal of dye from solution was due to reductive degradation. © (2013) Trans Tech Publications, Switzerland.


Sonar M.A.,Government Institute of Science | Gaikwad S.G.,Government Institute of Science
Journal of the Geological Society of India | Year: 2013

Paper describes six species of neocheilostomine bryozoans occurring in the Middle Eocene-Early Miocene rocks of Western Kachchh, Gujarat, India. Taxa belong to the families Quadricellariidae Gordon, 1984, Vinculariidae Busk, 1852 and Poricellariidae, Harmer, 1926. Of these three species are new. These are Vincularia feddeni nov sp. Poricellaria waioriensis nov sp. and Poricellaria sakurkari nov sp. Two species, Nellia tenella (Lamarck, 1816) and Vincularia kutchensis (Tewari & Srivastava, 1967) already known from this region, are further reported here. Poricellaria complicata (Reuss, 1869)? is reported for the first time and indicates oldest record from India so far. Phylogenetic analysis using PAST programme indicates that Poricellariids and Vinculariids have not evolved from the same ancestor Nellia tenella (Lamarck, 1816) © 2013 Geological Society of India.


Sonar M.A.,Government Institute of Science | Gaikwad S.G.,Government Institute of Science
Journal of Earth System Science | Year: 2013

Five species of Steginoporella from the Palaeogene rocks of the Western Kachchh, Gujarat are described in this paper. Out of five steginoporellids, S. mathuri n.sp., S. murachbanensis n.sp. and S. chiplonkari n.sp. are new to science; S. bhujensis is already reported from this region; and Steginoporella sp. indet is reported for the first time in these rocks. All these species show Indo-Pacific affinities. The occurrence of Steginoporella from Middle Eocene to Early Miocene indicates that two stages of radiation had taken place in Kachchh. Phylogenetic analysis using PAST programme indicates that S. mathuri is very distinct from other species of Steginoporella; while S. murachbanensis and S. bhujensis form the same clade. © Indian Academy of Sciences.


Gawande S.,Science College | Thakare S.R.,Government Institute of Science
ChemCatChem | Year: 2012

Herein we report on the synthesis of a ternary polymer composite of graphene, carbon nitride, and poly(3-hexylthiophene) (G-g-C 3N 4-P 3HT) by a solvothermal method. The prepared polymer composite catalysts are characterized by TEM, XRD, FTIR spectroscopy, and photoluminescence techniques for their morphology, structure and photocatalytic efficiency. Graphene-loaded polymer composites of carbon nitride (g-C 3N 4) and poly(3-hexylthiophene) act as efficient photocatalysts for waste water treatment. Methylene blue is used as the model pollutant and the rate of its photocatalytic degradation with G-g-C 3N 4-P 3HT is three times higher than that achieved with a g-C 3N 4-P 3HT composite. © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.


Arjunwadkar P.R.,Government Institute of Science | Patil R.R.,Government Institute of Science
Journal of Alloys and Compounds | Year: 2014

Al3+ substituted lithium ferrites having general formula Li 0.5Fe2.5-xAlxO 4 with x = 0, 0.5, 1.0, 1.5 and 2.0 were successfully synthesized by the chemical method. The starting materials used for this method are the metal nitrates and Urea (NH2CONH2) as fuel. This method involving exothermic reaction is popularly known as combustion method. X-ray diffraction and infra red spectroscopy is used to confirm the formation of the compounds. The room temperature electrical conductivity of these compounds is found relatively low which is attributed to the low loss of lithium during preparation. As expected the conductivity and Curie temperature (Tc) of these compounds is found to decrease with Al3+ substitutions. The μβ determined from hysteresis loop studies matches fairly with that of the calculated from presumed magnetic structure based on cation distribution and using the Neel's model. © 2014 Elsevier B.V. All rights reserved.


Dudhe C.M.,Government Institute of Science | Khambadkar S.J.,Government Institute of Science
Journal of Alloys and Compounds | Year: 2015

Abstract Various crystal habits and associated domain structures in PbTiO3 nanocrystals synthesized by a modified sol-gel method have been studied. Structural and morphological characterizations of synthesized nanoparticles have been done by X-ray diffraction (XRD) and transmission electron microscopy (TEM). It was found from the -z coordinates of O1 and O2 that the Ti-O6 octahedra were distorted slightly, favorable for the ferroelectric nature. TEM images show butterfly like, plate like, irregular sphere like and oval-shaped habits of the nanocrystals. 90°and 180°domain structures in these crystal habits were explored from their morphologies and appearance in the field of views. The mutual association between the crystal habit and the direction spontaneous polarization Ps due to domain structures was explored. Domain wall energies of 90°and 180°domains were also estimated from the kinetic process of domain nucleation. © 2015 Elsevier B.V.

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