Yashwantrao Chavan Institute of Science

Sātāra, India

Yashwantrao Chavan Institute of Science

Sātāra, India
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Waghmode R.B.,Yashwantrao Chavan Institute of Science | Torane A.P.,Yashwantrao Chavan Institute of Science
Journal of Materials Science: Materials in Electronics | Year: 2017

In present article, the chemical bath deposition method is used to prepare three dimensional NiCo2O4 thin films and used as an electrode material for supercapacitor application. The effect of reaction time on the supercapacitive performance is studied by varying the reaction time from 2 to 6 h. The 3D NiCo2O4 electrode delivers high specific capacitance of 540 F/g at scan rate of 5 mV/s with better cycling stability by retaining 93.5% initial capacitance after 1000 cycle. Additionally, the 3D NiCo2O4 electrode shows acceptable energy density of 56 Wh/kg at power density of 5.7 kW/kg. These excellent supercapacitive performance indicate the NiCo2O4 nanoflower like structure is a promising electrode material for future energy storage devices. © 2017 Springer Science+Business Media New York


Khogare B.T.,Raje Ramrao Mahavidyalaya | Khogare B.T.,Yashwantrao Chavan Institute of Science | Anuse M.A.,Shivaji University | Piste P.B.,Yashwantrao Chavan Institute of Science | Kokare B.N.,Raje Ramrao Mahavidyalaya
Desalination and Water Treatment | Year: 2015

A newly reported chelating agent, 4-heptylaminopyridine has been used for selective extraction and separation of palladium(II) from salicylate media at pH 0.5 is studied. The effect of different parameters such as pH, weak organic acid concentration, extractant concentration, equilibrium time, diluents, and stripping agent has been evaluated. Successful stripping of palladium(II) from the loaded organic phase is achieved with 6.0 M ammonia (2 × 10 mL) solution. The method affords separation of palladium(II) from binary and ternary mixtures and is applicable to the analysis of synthetic mixtures, alloys, catalysts, and water samples. The method is simple, selective, cost effective, and reproducible. © 2015 Balaban Desalination Publications. All rights reserved.


Khogare B.T.,Raje Ramrao Mahavidyalaya | Khogare B.T.,Yashwantrao Chavan Institute of Science | Kamble G.S.,Shivaji University | Kokare A.N.,Shivaji University | And 5 more authors.
Journal of Environmental Chemical Engineering | Year: 2016

In this paper, the solvent extraction of gold(III) from malonate media (0.04 mol L-1) has been studied by equilibrating aqueous phase having pH 2.5 with 10 mL of 0.07 mol L-1 4-heptylaminopyridine (4-HAP) as a novel anion exchanger diluted in xylene for 2 min. The extracted metal from organic phase was separated by stripping with 5.0 mol L-1 NH3 solution (2 × 10 mL). The effect of various parameters, such as pH, extractant concentration, weak acid concentration, equilibrium time, stripping agents, aqueous to organic volume ratio and diluents on the extraction of gold(III) was investigated. The extracted species has been evaluated from log D vs log C and species appears to be 1:2:1 (metal: acid: extractant). The selectivity of the method was checked by separating gold(III) from binary and ternary mixtures of associated metal ions as well as platinum group metals(PGMs). The separation of gold(III) from synthetic alloys and environmental samples was also carried out. © 2016 Elsevier Ltd. All rights reserved.


Khogare B.T.,Raje Ramrao Mahavidyalaya | Khogare B.T.,Yashwantrao Chavan Institute of Science | Anuse M.A.,Shivaji University | Piste P.B.,Yashwantrao Chavan Institute of Science | Kokare B.N.,Raje Ramrao Mahavidyalaya
Analytical Methods | Year: 2016

In this paper, the solvent extraction of platinum(iv) from ascorbate media (0.007 M) has been studied by equilibrating the aqueous phase (pH 1.5) with 10 mL of 0.06 M 4-heptylaminopyridine (4-HAP), as a novel anion exchanger, diluted in xylene for 2 min. The extracted metal was separated from the organic phase via stripping with water solution (2 × 10 mL). The effect of various parameters, such as pH, extractant concentration, weak acid concentration, equilibrium time, stripping agent, aqueous to organic volume ratio and diluent, on the extraction of platinum(iv) was investigated. The extracted species were evaluated via log D vs. log C and the species appeared to be in a ratio of 1 : 3 : 1 (metal : acid : extractant). The selectivity of the method was checked by separating platinum(iv) from binary and ternary mixtures of associated metal ions as well as platinum group metals (PGMs). The extraction separation of platinum(iv) from catalysts, anticancer injections, Pt-Rh thermocouple wires and water samples has been achieved. © The Royal Society of Chemistry 2016.


Pai S.R.,Shivaji University | Nimbalkar M.S.,Sahyadri Group Enriching Nature | Pawar N.V.,Yashwantrao Chavan Institute of Science | Dixit G.B.,Shivaji University
Industrial Crops and Products | Year: 2011

Simple, cost effective, quick and sustainable technique was investigated for determining Betulinic acid (BA) from samples of Ancistrocladus heyneanus. The methods comprised of continuous shaking, Soxhlet, ultra sonication and microwave assisted extraction techniques. RP-HPLC technique was used to quantify BA from varied samples and confirmation of the samples was done using TLC, FT-IR and FT-Raman methods. The study also evaluated productivity of operational parameters such as solvent composition and extraction time for three distinctive parts of the plant (green leaves, brown leaves and stem). Brown leaves showed response to continuous shaking extraction and ultrasonic extraction techniques with 95% Aq. MeOH as a good extraction solvent. BA was detected and quantified in continuous shaking method with 15, 30 and 45. min of exposure time. Comparison of 6. min with 12. min of ultra sonication, showed longer sonication diminished extraction efficiencies. Concluding, brown leaves in 95% MeOH and ultrasonic extraction technique to be the fastest, easiest and best method for detection and screening of BA from A. heyneanus. © 2011 Elsevier B.V.


Patil V.S.,Lal Bahadur Shastri College | Patil S.V.,Yashwantrao Chavan Institute of Science | Deshmukh H.V.,Yashwantrao Chavan Institute of Science | Pathade G.R.,Fergusson College
Nature Environment and Pollution Technology | Year: 2013

Soil salinity is a major problem in Maharashtra. Attempt is made to isolate salt-tolerant, thermotolerant, nitrogen fixing, phosphate solubilising Azotobacter spp. from the saline soil of Khodashi village in Satara district. Eight Azotobacter spp. were isolated from the saline soils. They were confirmed based on morphological, cultural and biochemical characteristics. They were tested for saline and thermal tolerance. The phosphate solubilizing potential of the these Azotobacter isolates was qualitatively evaluated by the formation of halos (clear zones) around the colonies growing on solid medium containing tribasic calcium phosphate as a sole phosphorus source. The results showed that phosphate solubilising, salt tolerant and thermotolerant Azotobacter spp. could be a promising source for the development of saline-Alkali soil-based agriculture.


Naikawadi V.B.,University of Pune | Naikawadi V.B.,Chandmal Tarachand Bora College | Ahire M.L.,University of Pune | Ahire M.L.,Yashwantrao Chavan Institute of Science | And 2 more authors.
Applied Microbiology and Biotechnology | Year: 2015

Evolvulus alsinoides L. is used for preparation of ‘Shankhapushpi’, an important popular ayurvedic drug that contributes considerably to the improvement of memory power. The improvement is attributed to the presence of furanocoumarin scopoletin, a metabolite with a wide range of biological activities. This report describes, for the first time, an in vitro culture system for propagation and enhanced production of scopoletin. Different concentrations of auxins and cytokinins individually and in combination were used in Murashige and Skoog (MS) medium to induce shoot regeneration in cotyledonary nodal explants and callus formation in leaf explants. The best response was achieved in MS medium fortified with 5.0 μM 6-benzyladenine (BA) in which 96 % of cultures produced 7.6 ± 0.6 shoots per explant. Regenerated shoots were rooted on MS medium with 5.0 μM indole-3-acetic acid (IAA). Plantlets were successfully acclimatized and established in soil. MS medium fortified with 10 μM BA + 5.0 μM IAA showed maximum growth and accumulation of scopoletin in cell cultures. Cell cultures could be maintained over 24 months. The influences of auxins, cytokinins, organic acids, amino acids, and fungal-derived elicitors on production of scopoletin were studied. Presence of either l-arginine, sodium pyruvate, or yeast extract highly promoted scopoletin production as compared with control and achieved 75.02-, 72.13-, and 57.98-fold higher accumulation, respectively. The results presented herein have laid solid foundation for large-scale production of scopoletin and further investigation of its purification and utilization as a novel pharmaceutical drug. © 2015 Springer-Verlag Berlin Heidelberg


Nimbalkar M.S.,Shivaji University | Nimbalkar M.S.,Sahyadri Group for Enriching Nature | Pai S.R.,Regional Medical Research Center | Pai S.R.,Sahyadri Group for Enriching Nature | And 4 more authors.
Food Chemistry | Year: 2012

Reliable and reproducible techniques for identification and quantification of amino acids usually require derivatization. However, techniques such as LC-MS/MS may perhaps sideline the derivatization with significant accuracy. Understanding the interaction between free amino acids and several physiological processes apparently requires that the pool be studied in the seed itself. Data on free amino acid content of grain amaranth is very inadequate. The present analysis revealed a higher concentration of essential amino acids especially Threonine and Tryptophan than non essential amino acids. The study constitutes first report of use of LC-MS/MS method for analysing the free amino acid composition of amaranth grain. © 2012 Elsevier Ltd. All rights reserved.


Waghmode R.B.,Yashwantrao Chavan Institute of Science | Torane A.P.,Yashwantrao Chavan Institute of Science
Journal of Materials Science: Materials in Electronics | Year: 2016

Three-dimensional NiCo2O4 nanoflowers have been directly grown on a stainless steel substrate surface, using a facile chemical bath deposition (CBD) technique. The deposited thin films were characterized for their structural, morphological and electrochemical properties by using XRD, SEM, cyclic voltammetry and charge discharge methods. The 3D NiCo2O4 nanoflowers were used as working electrode to measure the supercapacitor performance. The 3D NiCo2O4 nanoflowers exhibit high specific capacitance of 543 Fg−1 at current density 1 Ag−1. The capacitance loss was 9.4 % after 1000 cycles at a current density of 3 Ag−1. This shows a good cycle stability and high rate capability of 3D NiCo2O4 nanoflowers. From this investigation it can be concluded that the low cost and environmental friendly CBD technique could be used to deposit efficient 3D NiCo2O4 nanoflowers for supercapacitor application. © 2016, Springer Science+Business Media New York.


PubMed | Yashwantrao Chavan Institute of Science and Birla Institute of Technology and Science
Type: Journal Article | Journal: SpringerPlus | Year: 2016

Mangroves are salt-tolerant forest ecosystems of tropical and subtropical intertidal regions. They are among most productive, diverse, biologically important ecosystem and inclined toward threatened system. Identification of mangrove species is of critical importance in conserving and utilizing biodiversity, which apparently hindered by a lack of taxonomic expertise. In recent years, DNA barcoding using plastid markers rbcL and matK has been suggested as an effective method to enrich traditional taxonomic expertise for rapid species identification and biodiversity inventories. In the present study, we performed assessment of available 14 mangrove species of Goa, west coast India based on core DNA barcode markers, rbcL and matK. PCR amplification success rate, intra- and inter-specific genetic distance variation and the correct identification percentage were taken into account to assess candidate barcode regions. PCR and sequence success rate were high in rbcL (97.7%) and matK (95.5%) region. The two candidate chloroplast barcoding regions (rbcL, matK) yielded barcode gaps. Our results clearly demonstrated that matK locus assigned highest correct identification rates (72.09%) based on TaxonDNA Best Match criteria. The concatenated rbcL+matK loci were able to adequately discriminate all mangrove genera and species to some extent except those in Rhizophora, Sonneratia and Avicennia. Our study provides the first endorsement of the species resolution among mangroves using plastid genes with few exceptions. Our future work will be focused on evaluation of other barcode markers to delineate complete resolution of mangrove species and identification of putative hybrids.

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