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Kulal S.R.,Metal Oxide Research Laboratory | Khetre S.S.,Metal Oxide Research Laboratory | Jagdale P.N.,Metal Oxide Research Laboratory | Gurame V.M.,Shri Shivaji Mahavidyalaya | And 4 more authors.
Materials Letters | Year: 2012

Dysprosium doped Co-Zn ferrites were synthesized by sol-gel auto combustion method. These synthesized compounds were characterized by using XRD, SEM, FTIR, EDS, TGA-DTA and TEM. TGA weight loss in the region of 100-200°C and this loss is due to autocatalytic oxidation reduction reactions of nitrates with glycine. The composition Co 0.5Zn 0.5Fe 2-xDy xO 4 (x=0.075) shows fibrous reticulated mesh like morphology. The average grain size increases with increasing the Dy content in the Co-Zn ferrite. The XRD study of Dy doped Co-Zn ferrite shows in Cubic spinel phase. Particle size obtained from TEM analysis was found to be 30-40 nm. The FTIR spectra showed the characteristic of two strong absorption bands at 560 cm -1 corresponds to intrinsic stretching vibrations of the metal at the tetrahedral site and lowest band is observed at 455 cm -1 corresponds to octahedral site. © 2012 Elsevier B.V. All rights reserved.

Ghodake U.R.,Shri Shivaji Mahavidyalaya | Chaudhari N.D.,Pratishthan Mahavidyalaya | Kambale R.C.,University of Pune | Patil J.Y.,University of Solapur | Suryavanshi S.S.,University of Solapur
Journal of Magnetism and Magnetic Materials | Year: 2016

In this work, Mn substituted Mg-Zn spinel ferrites having general formula Zno.4Mg0.6-xMnxFe2O4 (0≤x≤0.30) have been synthesized by oxalate precursor chemical method and investigated their structural, magnetic and electric properties. X-ray diffraction (XRD) is used to study the crystal structure of synthesized materials. XRD study reveals the formation of polycrystalline cubic spinel lattice structure without any impurity phase having crystallite size in the range from 39.97 nm to 45.62 nm. Scanning electron micrographs revealed, increase in grain size (D) with increase in Mn2+ content up to x=0.10; then it decreases for x>0.10. Energy dispersive x-ray analysis (EDAX) confirms the presence of Mg2+, Mn2+, Fe3+, Zn2+ and O2- ions as per the stoichiometry. The magnetic moment (nB), with Mn2+ substitution is found to increase initially up to x=0.10 and then it deceases with further Mn2+ substitution. The observed variation in the magnetic moment (nB) is explained by considering the variation of saturation magnetization, anisotropy constant, density values and exchange interaction. The d.c. electrical resistivity decreased with increase in temperature in accordance with semiconducting behavior. Furthermore, the conductivity was found to obey the Arrhenius relation with a change in slope at critical temperature (i.e. the Curie temperature). The increase in d.c. resistivity is attributed to the hindering of Verwey mechanism between Fe2+⇔Fe3+ ions and Mn2+⇔Mn3+. The dielectric constant (ε′) measurement revealed the dielectric dispersion behavior in accordance with the Maxwell-Wagner model and Koops phenomenological theory, which is responsible for conduction and polarization. The dielectric characteristics (ε′, ε″ and tan δ) exhibit dispersion due to Maxwell-Wagner type interfacial polarization. The values of dielectric constant (ε′) and a.c. resistivity (ρac) exhibit highest magnitude at x=0.10 and decreases further with Mn2+ substitution. © 2016 Elsevier B.V. All rights reserved.

Bismarck Brown Y was selected as model textile dye. The fungal strain Alternaria brassicae TSF -07 isolated from textile wastewater sludge was screened for decolourization of Bismarck Brown Y. Optimization was carried out with respect to carbon source, nitrogen source, pH, inoculums size, incubation period and temperature. It was found that the optimum inoculum size, pH and temperature were 2.5%, 5.0 and 350C respectively. Fructose at 1.0 % and yeast extract at the concentration of 0.1 % was found to give maximum decolourization. Further, it was found that the culture has brought about almost 96.03% decolourization of a recalcitrant dye, Bismarck Brown Y (100 mgL-1) at shaking condition within 3 days. This isolate also showed the degradation as evidenced from the reduction in the term of COD mg/L to the extent of 68.09 % within three days. The biodegradation was monitored by UV-Vis and FTIR spectroscopy. This study revealed the enormous biodegradation abilities of indigenous microbial flora.

Sowani H.M.,Walchand Center for Biotechnology | Thorat P.,Shri Shivaji Mahavidyalaya
OnLine Journal of Biological Sciences | Year: 2012

Problem statement: In the present study, Staphylococcus aureus a causative agent of food poisoning is selected as a test organism to study the antimicrobial effect of bacteriocin. S. aureus produces number of exotoxins and enterotoxins which enters the body via contaminated food causing illness. Approach: In this case the use of antibiotics is one of the ways of treatment, but in addition to this if we advise such patients to consume the carrot kanji then it will cause better effect because carrot kanji is the naturally fermented food beverage consisting of microflora mainly the Lactobacilli. Results: The Lactobacilli have ability to produce antimicrobial compounds called bacteriocin. Isolation of bacteriocin was carried out from the naturally fermented carrot kanji. The bacteriocin produced by Lactobacilli was dialysed and used for the further studies. The well diffusion method is used to study the antimicrobial activity, effect of temperature, pH, enzymes on bacteriocin. From the diameter of zone of inhibition the activity of bacteriocin was determined. The sensitivity of bacteriocin at different pH range showed that at neutral pH the diameter of inhibition zone was greater than that at alkaline as well as acidic pH. Upto 100°C the bacteriocin activity was 80% but as temperature range increased upto 121°C it reduced sharply to 28%. Conclusion/Recommendations: In addition to this the effect of alpha amylase, trypsin, catalase enzyme on bacteriocin activity was also studied which shows positive results with alpha amylase, reduced activity with trypsin and catalase remained unaffected. © 2012 Science Publications.

PubMed | Shri Shivaji Mahavidyalaya and Shivaji University
Type: Journal Article | Journal: Bioorganic & medicinal chemistry letters | Year: 2016

Objective of the present work was to evaluate the anti-inflammatory, ulcerogenicity and cyclooxygenase activity of indenopyrimidine derivatives. Anti-inflammatory activity of the tested compounds is investigated by carrageenan-induced rat paw edema assay. Compounds A1, A6, A7 and A12 exhibit the comparable anti-inflammatory activity (79.33-81.33%) to the standard drug diclofenac sodium (85.33%), while A6, A7, A9, A12 and A14 show better ulcer index than the reference standard diclofenac sodium. To rationalize the anti-inflammatory activity, docking experiments are performed to study the ability of these compounds to bind into the active site of COX-2 enzyme.

Mohite R.M.,University of Solapur | Kothawale R.R.,Shri Shivaji Mahavidyalaya
Indian Journal of Chemistry - Section A Inorganic, Physical, Theoretical and Analytical Chemistry | Year: 2015

Al-doped zinc oxide thin films have been prepared by chemical bath deposition using aqueous zinc nitrate solution and characterized by X-ray diffraction, scanning electron microscope, energy dispersive spectroscopy and d.c. resistivity measurements. I-V measurements have been made in dark and under UV-light illumination. High conductivity and transparency of these thin films make them suitable for transparent conductive oxide and window layer applications in solar cells. This material also has potential use in optoelectronic devices such as photo-detectors, photonic crystals, ultraviolet light sensors and light emitting diodes. © 2015 Indian Journal of Chemistry.

Shertate R.S.,Shri Shivaji Mahavidyalaya | Thorat P.,Shri Shivaji Mahavidyalaya
OnLine Journal of Biological Sciences | Year: 2012

Problem statement: The textile industries use different types of dyes in their processing units which are liberated in natural marine water bodies. This release of dyes in turn affect the marine flora and fauna very adversely. Approach: The release of textile dyes into the environment is a matter of concern due to the toxicity, mutagenicity, carcinogenicity and xenobiotic nature. Hence, considerable attention has been given in determining the ability of marine microorganism in decolorization and degradation of textile dyes. Results: The present study deals with the decolorization of Mordant Orange-1 was carried out using the acclimatized Marinobacter algicola MO-17 isolated from natural marine environment. The acclimatized strain was capable of decolorizing 800 μg mL -1 of the dye at high salt concentration (12%) in 24 h. The percent decolorization of the dye was moderated by spectroscopy at 385 nm (λmax). Conclusion/Recommendations: The spectrophotometric analysis showed 78.78% decolorization in Nutrient Broth and 76.78% decolorization in Half Strength Nutrient Broth. The percent Chemical Oxygen Demand (COD) reduction of the dye by the strain was 90%. From the study performed, we conclude that, this acclimatized strain can prove better option for bioremediation of textile dyes in wastes containing high salts and in marine environment. © 2012 Science Publications.

Shertate R.S.,Shri Shivaji Mahavidyalaya | Thorat P.,Shri Shivaji Mahavidyalaya
American Journal of Environmental Sciences | Year: 2014

Presence of huge amount of salts in the wastewater of textile dyeing industry is one of the major limiting factors in the development of an effective biotreatment system for the removal of dyes from textile effluents. Large number of textile industries are located on the coastal areas due to ease of transport to the various places in world and help in building nations economy, but on the contrary the effluents released from these industries are proving a great problem for the marine life. Therefore, industrial effluents containing dyes must be treated before their safe discharge into the environment. There are various physiochemical methods are conventionally used. These methods are effective but quite expensive leading to the production of solid sludge. Bacterial spp. capable of thriving under high salt conditions could be employed for the treatment of saline dye-contaminated textile wastewaters. Most of the Scientists used chemical coagulation, Flocculation and Precipitation techniques for the removal of dye colors from waste waters. But this method is not cost beneficial as it generates huge amount of Sludge and to dispose the sludge is major problem. The physical methods are also not cost effective. So only biological treatment using acclimatized microorganisms could remove 99-100% dye colour from wastewater. Hence now a day most of the workers concentrated on biotransformation of textile azo dyes by adapted organisms. The use of co substrates also slightly increased the decolorization of dye solution. Some scientists showed that the products of dye degradation are not toxic to biological system. Products formed can be determined by Gas Chromatography and Mass Spectroscopy (GC-MS) technique, Fourier Transform Infra Red (FTIR) etc. © 2014 Shertate and Thorat.

Kamble A.P.,Shriman Bhausaheb Zadhabuke Mahavidyalaya | Thorat P.,Shri Shivaji Mahavidyalaya | Kulkarni S.W.,Shriman Bhausaheb Zadhabuke Mahavidyalaya
OnLine Journal of Biological Sciences | Year: 2012

Problem statement: Soil Pollution is major problem because different types of pesticides are used to control plant pest. The residual component of pesticide diffuses into the soil. It is necessary to check whether actinomycetes degrade these components and control the soil pollution. Approach: In Ayurved system of medicine the rhizome portion of Curcuma longa L. was used as an anti-inflammatory and antiseptic. Antimicrobial substances released from these plants diffuse into the surrounding soil area of the plant. Actinomycete which grow in these area were resistant to these substances. Hence considerable attention had been given in studying the effect of inhibitory substances on actinomycetes especially Microbiospora isolated from soil under cultivation of Curcuma longa L. Results: The present study deals with effect of inhibitory substances like dettol, phenol, sodium azide, lysol and crystal violet. The results were recorded on the basis of presence or absence of growth. All five isolates of Microbiospora were found sensitive against dettol. One strain of Microbiospora was found resistant to phenol. Conclusion/Recommendations: From the study performed we conclude that Microbiospora which is resistant to phenol and other inhibitory substances can be used to degrade the residual components of pesticide which are released into the soil. It may have better option to prevent soil pollution. © 2012 Science Publications.

Shertate R.S.,Shri Shivaji Mahavidyalaya | Thorat P.R.,Shri Shivaji Mahavidyalaya
International Journal of Pharma and Bio Sciences | Year: 2013

A marine bacterium capable of degrading the textile azo dye Direct Red 5B was isolated from natural environments on nutrient medium containing the high salinity and the dye. It was identified as Marinobacter sp. DR-7 (Accession No. HF558993) on the basis of biochemicals and phylogenetic analysis based on 16s rRNA gene sequence. The decolorization of the azo dye Direct Red 5B in nutrient broth and half strength nutrient broth having 8.0% salt concentration was up to 94.00% and 92.00% respectively in 24 hours. The degradation products formed were analyzed by GC-MS technique and it was found that culture degraded Direct Red 5B to the products having molecular weights 98, 99, 100, 149, 150, 149, 150, 149, 150, 223, 149, 150, 57, 113, 149, 167 and 279.The isolate reduced the COD of the dye up to 70%.

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