Kolhapur, India
Kolhapur, India

Shivaji University , established in 1962, is in Kolhapur, Maharashtra, India. It is spread over a sprawling campus of 853 acres . The university is named after the great Chhatrapati Shivaji Maharaj, founder of the Maratha Empire. It was inaugurated on 18 November 1962 by Sarvepalli Radhakrishnan, the then president of India. Yashwantrao Chavan and Balasaheb Desai took the lead in establishing this university. Kolhapur, Sangli, and Satara come under its jurisdiction with 279 affiliated colleges and recognised institutes. One of the major objectives behind its foundation was to cater to the regional needs of South Maharashtra. Wikipedia.

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Jadhav S.,Shivaji University | Kumbhar A.,PDVP College TasgaonMS | Salunkhe R.,Shivaji University
Applied Organometallic Chemistry | Year: 2015

Palladium supported on silica-chitosan hybrid material was prepared and characterized using thermogravimetric and differential thermogravimetric analyses, scanning electron microscopy, and Fourier transform infrared, energy-dispersive X-ray and X-ray photoelectron spectroscopies. The prepared Pd-CS@SiO2 catalyst (1 mol%) was used for the Suzuki-Miyaura cross-coupling reaction of various aryl halides and arylboronic acids in 95% ethanol at 80 °C and the Mizoroki-Heck reaction in dimethylformamide at 110 °C using K2CO3 as a base. The developed catalyst is well suitable for the 3R approach (recoverable, robust, recyclable) for cross-coupling reactions without appreciable loss of its activity. Copyright © 2015 John Wiley & Sons, Ltd.

The stratified WO3/TiO2 thin films have been deposited onto glass and FTO coated glass substrates using simple chemical a spray pyrolysis method. The structural, morphological, compositional and photoelectrocatalytic properties of the stratified WO3/TiO2 thin films are studied. The photoelectrochemical (PEC) study shows that, both short circuit current (Isc) and open circuit voltage (Voc) are (Isc =1.192mA and Voc =0.925V) relatively high at 50ml spraying quantity of TiO2 solution on pre-deposited WO3. XRD analysis confirms that films are polycrystalline with monoclinic and tetragonal crystal structures for WO3 and TiO2 respectively. Specific surface area of 72.14m2 g-1 is measured by Brunauer-Emmett-Teller (BET) technique. Photoelectrocatalytic degradation of benzoic acid (BA) dye in aqueous solutions is studied. The end result shows that the degradation percentage of benzoic acid (BA) using stratified WO3/TiO2 photoelectrode has reached 66% under sunlight illumination after 320min. The amount of degradation is confirmed by COD analysis. © 2017 Elsevier Ltd and Techna Group S.r.l.

Shetty V.G.,Shivaji University
International Journal of Pharmacy and Pharmaceutical Sciences | Year: 2015

Objective: The present study made an attempt to produce commercially valuable citric acid by the fungal strain Aspergillus niger from molasses and corncob using submerged fermentation, as the best alternative to the sugar substrate. Methods: Three types of production media were prepared including control (sucrose) by following standard fermentation conditions. The acid production was indicated by the reduction of pH levels. The citric acid content and residual sugars of the final hydrolysate were estimated by the Marrier and Boulet method and Anthrone Sulphuric acid method respectively. Results: The control production medium gave yield of 4.6 milligrams per milliter (mg/ml) at pH 3.0 on 10thday. The medium containing molasses and other compositions gave the yield of 10.4 mg/ml, whereas corncob medium and other compositions gave the yield of 5.3 mg/ml at pH 2.5. The medium containing molasses and corncob separately with 5 percent (%) sucrose gave the highest yield of 12.6 mg/ml and 6.7 mg/ml at pH 3.0 respectively. Different factors affecting citric acid production by fermentation were also studied. Sucrose was found superior for maximum citric production at optimum incubation temperature at 30 degree Celsius (⁰C). The nitrogen supplements, ammonium sulphate and ammonium chloride at a concentration of 0.25% and 0.5% respectively gave the highest yield, whereas the methanol concentration of 2% was found optimum for obtaining maximum yield of citric acid. Conclusion: Molasses and corncob when replaced with sucrose in the fermentation medium produced significant amount of citric acid. The results imply the effective use of molasses and corncob as an alternative substrate for the production of commercially valuable, citric acid with a cost effective approach. © 2015, International Journal of Pharmacy and Pharmaceutical Sciences. All right reserved.

A few points of scientific importance regarding the XRD data interpretation of the recently reported novel ZnAg3SbO4 are raised in this comment. The formation of AgCl (along with some impurities originating from Zn and/or Sb) rather than ZnAg3SbO4 is proved after comparison of the reported XRD pattern in the original paper and the simulated XRD pattern of AgCl in this comment. This journal is © the Partner Organisations 2014.

Bhalekar S.B.,Shivaji University
Pramana - Journal of Physics | Year: 2013

In this paper we analyse stability of nonlinear fractional order delay differential equations of the form Dα y(t) = a f (y(t - τ) - by(t), where Dα is a Caputo fractional derivative of order 0 < α 1. We describe stability regions using critical curves. To explain the proposed c Indian Academy of Sciences theory, we discuss fractional order logistic equation with delay. © Indian Academy of Sciences.

Shinde S.S.,Shivaji University | Rajpure K.Y.,Shivaji University
Journal of Alloys and Compounds | Year: 2012

We report study on the fabrication and characterization of an ultraviolet (UV) photodetectors based on N-doped ZnO films. The N-doped ZnO films with 10 at% N doping are spray deposited on to alumina substrates. The photoconductive UV detector based on N-doped ZnO thin films, having a metal-semiconductor-metal (MSM) configuration are fabricated using Al as a contact metal. The dependence of I-V characteristic under dark and illumination, spectral and transient photoresponse of the detector are investigated. The linear current-voltage (I-V) characteristics under forward bias exhibit ohmic metal-semiconductor contact. The UV photoconductive effect is observed showing fast response with switching on/off UV light illumination. The neutralization of photogenerated holes by negatively charged oxygen ion plays a key role in the photoconductive characteristics of N-doped ZnO polycrystalline films. © 2012 Elsevier B.V. All rights reserved.

Inamdar S.I.,Shivaji University | Rajpure K.Y.,Shivaji University
Journal of Alloys and Compounds | Year: 2014

Zinc oxide (ZnO) based metal-semiconductor-metal (MSM) ultraviolet photodetectors at different substrate temperatures were fabricated on glass substrates by economical chemical spray pyrolysis technique and its UV photoresponsivity was measured at room temperature. The samples were characterized with respect to their structural, morphological, and optical properties using various methods such as X-ray diffraction (XRD), scanning electron microscopy (SEM), UV-Vis spectroscopy, transmittance, reflectance etc. The synthesized ZnO thin films were c-axis oriented with hexagonal crystal structure as confirmed from XRD. All deposited films were specular and show high transmittance (∼85%) in visible region with steep fall off at 375 nm. The photoconductive MSM UV photodetector showed relatively high photocurrent (1.3 mA) and fast switching. ZnO thin films exhibited relatively high photoresponsivity (788 A/W) with cut of wavelength ∼375 nm signifying their application as UV detector. © 2014 Elsevier B.V. All rights reserved.

Jagtap U.B.,Shivaji University | Bapat V.A.,Shivaji University
Journal of Ethnopharmacology | Year: 2010

The genus Artocarpus (Moraceae) comprises about 50 species of evergreen and deciduous trees. Economically, the genus is of appreciable importance as a source of edible fruit, yield fairly good timber and is widely used in folk medicines. The aim of the present review is to present comprehensive information of the chemical constituents, biological and pharmacological research on Artocarpus which will be presented and critically evaluated. The close connection between traditional and modern sources for ethnopharmacological uses of Artocarpus species, especially for treatment against inflammation, malarial fever, diarrhoea, diabetes and tapeworm infection. Artocarpus species are rich in phenolic compounds including flavonoids, stilbenoids, arylbenzofurons and Jacalin, a lectin. The extracts and metabolites of Artocarpus particularly those from leaves, bark, stem and fruit possess several useful bioactive compounds and recently additional data are available on exploitation of these compounds in the various biological activities including antibacterial, antitubercular, antiviral, antifungal, antiplatelet, antiarthritic, tyrosinase inhibitory and cytotoxicity. Several pharmacological studies of the natural products from Artocarpus have conclusively established their mode of action in treatment of various diseases and other health benefits. Jacalin, a lectin present in seeds of this plant has a wide range of activities. Strong interdisciplinary programmes that incorporate conventional and new technologies will be critical for the future development of Artocarpus as a promising source of medicinal products. In the present review, attempts on the important findings have been made on identification; synthesis and bioactivity of metabolites present in Artocarpus which have been highlighted along with the current trends in research on Artocarpus. © 2010 Elsevier Ireland Ltd.

Jagtap U.B.,Shivaji University | Bapat V.A.,Shivaji University
Industrial Crops and Products | Year: 2013

A novel approach for the green synthesis of silver nanoparticles (AgNPs) from aqueous solution of silver nitrate (AgNO3) by using Artocarpus heterophyllus Lam. seed powder extract (ASPE), as a reducing agent has been reported in the present work. The seed contains Jacalin, a lectin which is a single major protein representing more than 50% of the proteins from the jackfruit crude seed extract having several biological activities. The reaction of ASPE and AgNO3 was carried out in an autoclave at 15psi, 121°C for 5min and the biosynthesis of the AgNPs in solution was monitored by measuring the UV-vis spectroscopy. The morphology and crystalline phase of the NPs were determined using transmission electron microscopy (TEM), selected area electron diffraction (SAED), scanning electron microscopy (SEM) with X-ray energy dispersive spectrophotometer (EDAX) and Fourier transform infrared spectroscopy (FTIR). The AgNPs synthesized were generally found to be irregular in shapes with an average size 10.78nm. The FTIR spectra indicated the role of amino acids, amides group I in the synthetic process. The AgNPs thus obtained showed highly potent antibacterial activity toward Gram-positive (Bacillus cereus, Bacillus subtilis and Staphyloccocus aureus) and Gram-negative (Pseudomonas aeruginosa) microorganisms. The results confirmed that the ASPE is a very good eco friendly and nontoxic source for the synthesis of AgNPs as compared to the conventional chemical/physical methods. Therefore, A. heterophyllus seed provides future opportunities in nanomedicine by tagging nanoparticles with jacalin. © 2013 Elsevier B.V.

Tagetes patula is an annual flowering plant belonging to family Asteraceae. The present study deals with in vitro decolorization and remediation of a textile dye Reactive Blue 160 by T. patula. There was considerable (∼90%) decolorization of the dye within 4. d of incubation, as confirmed by UV-vis, HPLC and FTIR analysis. The enzymes responsible for the remediation were lignin peroxidase, tyrosinase, laccase and NADH-DCIP reductase which were found in root tissues of the plantlets. GC-MS analysis of the products revealed formation of six metabolites such as sodium benzenesulfonate, 6-chloro 1,3,5-triazine-2,4-diamine, disodium benzene-1,4-disulfonate, sodium 3-amino-4-hydroxybenzenesulfonate, 1-phenylmethanediamine and sodium 4-amino-3-carboxybenzenesulfonate after phytoremediation of Reactive Blue 160. Based on the FTIR and GC-MS results, the possible pathway for the biodegradation of Reactive Blue 160 has been traced. The non-toxic nature of the degraded products was confirmed by performing cytogenotoxicity tests on root tip cells of growing Allium cepa. © 2013 Elsevier Ltd.

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