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Differential fate of metabolism of a disperse dye by microorganisms Galactomyces geotrichum and Brevibacillus laterosporus and their consortium GG-BL

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Journal of Environmental Sciences 2012年第7期24卷 1295-1304页

作者： Tatoba R.Waghmode Mayur B.Kurade Anuradha N.Kagalkar Sanjay P.Govindwar Department of Biochemistry Shivaji University Department of Biotechnology Shivaji University

The present work aims to evaluate Brown 3 REL degrading potential of developed microbial consortium GG-BL using two microbial cultures, Galactomyces geotrichum MTCC 1360 （GG） and BrevibaciUus laterosporus MTCC 2298 （BL）. Microbial consortium GG-BL showed 100% decolorization of a dye Brown 3 REL, while individually G. geotrichum MTCC 1360 and B. laterosporus MTCC 2298 showed 26% and 86% decolorization under aerobic condition （shaking） respectively. Measurements of biochemical oxygen demand （BOD）（76%） and chemical oxygen demand （COD）（68%） were done after decolorization by consortium GG-BL. No induction in activities of oxidoreductive enzymes found in G. geotrichum while B. laterosporus showed induction of veratryl alcohol oxidase, Nicotineamide adenine dinucleotide-dichlorophenol indophenol （NADH-DCIP） reductase and riboflavin reductase indicating their role in dye metabolism. Consortium GG-BL showed induction in the activities of laccase, veratryl alcohol oxidase, tyrosinase, NADH-DCIP reductase and riboflavin reductase. Two different sets of induced enzymes from G. geotrichum and B. laterosporus work together in consortium GG-BL resulting in faster degradation of dye. The degradation of Brown 3 REL was analyzed using high performance thin layer chromatography （HPTLC）, high performance liquid chromatography （HPLC）, Fourier transform infrared spectroscopy （FT-IR） and gas chromatography mass spectroscopy （GC-MS）. Phytotoxicity study revealed that metabolites formed after degradation was significantly less toxic in nature.

关键词： consortium GG-BL decolorization Brown 3 REL biochemical oxygen demand laccase biodegradation

Photocatalytic activity of Eu^(3+)-doped ZnO nanorods synthesized via microwave assisted technique

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Journal of Rare Earths 2014年第4期32卷 306-313页

作者： P.V.Korake A.N.Kadam K.M.Garadkar Nanomaterials Research Laboratory Department of Chemistry Shivaji University

The doped ZnO nanorods as a photocatalyst with different Eu contents were prepared by microwave assisted method and they were characterized by means of X-ray diffraction （XRD）, energy-dispersive X-ray spectroscopy （EDS）, UV-Vis spectroscopy, surface area Brunauer-Emmett-Teller （BET）, X-ray photoelectron spectroscopy （XPS）, scanning electron microscopy （SEM） and transmission electron microscopy （TEM）. The average crystallite size and band gap energy of Eu-doped ZnO were varied with the Eu content. The XRD pattern of Eu-doped ZnO indicated hexagonal crystal structure with an average crystallite size of 25 nm. The pres-ence of europium with trivalent state and its doping successfully into the crystal lattice of ZnO matrix were confirmed by XPS tech-nique. The photocatalytic activity of Eu-doped ZnO nanorods was evaluated for methyl orange degradation. The photocatalytic experi-ments showed^91%degradation of methyl orange over 0.2 mol.%Eu doped ZnO sample within 3 h under UV light （365 nm）.

关键词： zinc oxide rare earths europium nanorods microwave dye degradation

Physical properties of hematite α-Fe_2O_3 thin films:application to photoelectrochemical solar cells

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Journal of Semiconductors 2011年第1期32卷 9-16页

作者： S.S.Shinde R.A.Bansode C.H.Bhosale K.Y.Rajpure Electrochemical Materials Laboratory Department of Physics Shivaji University

The physical properties and photoelectrochemical characterization of aluminium doped hematite α-Fe2O3, synthesized by spray pyrolysis, have been investigated in regard to solar energy conversion. Stable Al-doped iron （Ⅲ） oxide thin films synthesized by a spray pyrolysis technique reveals an oxygen deficiency, and the oxide exhibits n-type conductivity confirmed by anodic photocurrent generation. The preparative parameters have been optimized to obtain good quality thin films which are uniform and well adherent to the substrate. The deposited iron oxide thin films show the single hematite phase with polycrystalline rhombohedral crystal structure with crystallite size 20-40 nm. Optical analysis enabled to point out the increase in direct band-gap energy from 2.2 to 2.25 eV with doping concentration which is attributed to a blue shift. The dielectric constant and dielectric loss are studied as a function of frequency. To understand the conduction mechanism in the films, AC conductivity is measured. The conduction occurs by small polaron hopping through mixed valences Fe2＋/3＋ with an electron mobility 300 K of 1.08 cma/（V.s）. The oe-Fe203 exhibits long term chemical stability in neutral solution and has been characterized photoelectrochemically to assess its activity as a photoanode for various electrolytes using white light to obtain I- V characteristics. The Al-doped hematite exhibited a higher photocurrent response when compared with undoped films achieving a power conversion efficiency of 2.37% at 10 at% Al：Fe2O3 thin films along with fill factor 0.38 in NaOH electrolyte. The flat band potential Vfb （-0.87 VscE） is determined by extrapolating the linear part to C-2 = 0 and the slope of the Mott-Schottky plot.

关键词： photoelectrochemical hematite spray photoanode

Machine learning techniques for prediction of capacitance and remaining useful life of supercapacitors: A comprehensive review

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Journal of Energy Chemistry 2023年第2期77卷 438-451,I0011页

作者： Vaishali Sawant Rashmi Deshmukh Chetan Awati Department of Technology Shivaji UniversityKolhapurMaharashtraIndia

Supercapacitors are appealing energy storage devices for their promising features like high power density,outstanding cycling stability,and a quick charge–discharge *** exceptional life cycle and ultimate power capability of supercapacitors are needed in the transportation and renewable energy generation ***,predicting the capacitance and lifecycle of supercapacitors is significant for selecting the suitable material and planning replacement intervals for *** addition,system failures can be better addressed by accurately forecasting the lifecycle of ***,the use of machine learning for performance prediction of energy storage materials has drawn increasing attention from researchers globally because of its superiority in prediction accuracy,time efficiency,and *** article presents a detailed review of the progress and advancement of ML techniques for the prediction of capacitance and remaining useful life(RUL)of *** review starts with an introduction to supercapacitor materials and ML applications in energy storage devices,followed by workflow for ML model building for supercapacitor ***,the summary of machine learning applications for the prediction of capacitance and RUL of different supercapacitor materials including EDLCs(carbon based materials),pesudocapacitive(oxides and composites)and hybrid materials is ***,the general perspective for future directions is also presented.

关键词： Supercapacitors Energy storage materials Artificial neural network Machine learning Capacitance prediction Remaining useful life

Structural and optoelectronic properties of sprayed Sb:SnO_2 thin films:Effects of substrate temperature and nozzle-to-substrate distance

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Journal of Semiconductors 2011年第10期32卷 1-9页

作者： A.R.Babar S.S.Shinde A.V.Moholkar C.H.Bhosale K.Y.Rajpure Electrochemical Materials Laboratory Department of PhysicsShivaji University

The influence of substrate temperature and nozzle-to-substrate distance（NSD） on the structural,morphological, optical and electrical properties of Sb：SnO_2 thin films prepared by chemical spray pyrolysis has been *** structural,morphological,optical and electrical properties were characterized by using XRD,SEM, UV-visible spectrophotometry and Hall effect measurement *** was seen that the films are polycrystalline, having a tetragonal crystal structure with strong orientation along the（200） *** pyramidal crystallites formed due to coalescence were observed from SEM *** values of highest conductivity,optical transmittance and figure of merit of about 1449（Ω·cm）^（-1）,70%and 5.2×10^（-3）□/Ω,respectively,were observed for a typical film deposited using optimal conditions（substrate temperature = 500℃and NSD = 30 cm）.

关键词： substrate temperature NSD structural optoelectronic properties

Physical properties of spray deposited CdTe thin films:PEC performance

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Journal of Semiconductors 2011年第3期32卷 10-16页

作者： V.M.Nikale S.S.Shinde C.H.Bhosale K.Y.Rajpure Electrochemical Materials Laboratory Department of PhysicsShivaji University

p-CdTe thin films were prepared by spray pyrolysis under different ambient conditions and characterized using photoelectrochemical（PEC）,X-ray diffraction（XRD）,scanning electron microscopy,energy-dispersive analysis by X-ray（EDAX）,and optical transmission *** different preparative parameters viz solution pH, solution quantity,substrate temperature and solution concentration have been optimized by the PEC technique in order to get good-quality photosensitive *** analysis shows the polycrystalline nature of the film,having cubic structure with strong（111） *** reveal that grains are uniformly distributed over the surface of the substrate indicating the well-defined growth of polycrystalline CdTe thin *** EDAX study for the sample deposited at optimized preparative parameters shows the nearly stoichiometric Cd：Te *** absorption shows the presence of direct transition with band gap energy of 1.5 *** films exhibit the highest photocurrent of 2.3 mA,a photovoltage of 462 mV,a 0.48 fill factor and 3.4%efficiency for the optimized preparative parameters.

关键词： CdTe PEC temperature concentration structure morphology composition optical

Grid Integration of Electric Vehicles for Economic Benefits:A Review

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Journal of Modern Power Systems and Clean Energy 2021年第1期9卷 13-26页

作者： Harshavardhan Patil Vaiju Nago Kalkhambkar Rajarambapu Institute of Technology(affiliated to shivaji university Kolhapur)

Emissions from the internal combustion engine(ICE) vehicles are one of the primary cause of air pollution and climate change. In recent years, electric vehicles(EVs) are becoming a more sensible alternative to these ICE vehicles. With the recent breakthroughs in battery technology and large-scale production, EVs are becoming cheaper. In the near future,mass deployment of EVs will put severe stress on the existing electrical power system(EPS). Optimal scheduling of EVs can reduce the stress on the existing network while accommodating large-scale integration of EVs. The integration of these EVs can provide several economic benefits to different players in the energy market. In this paper, recent works related to the integration of EV with EPS are classified based on their relevance to different players in the electricity market. This classification refers to four players: generation company(GENCO), distribution system operator(DSO), EV aggregator, and end user. Further classification is done based on scheduling or charging strategies used for the grid integration of EVs. This paper provides a comprehensive review of technical challenges in the grid integration of EVs along with their solution based on optimal scheduling and controlled charging strategies.

关键词： Electric vehicle(EV)scheduling economic benefit vehicle-to-grid(V2G) aggregator EV grid integration distribution system operator(DSO) cost minimization

Differently synthesized gold nanoparticles respond differently to functionalization with L-amino acids

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Particuology 2020年第5期18卷 97-104页

作者： Darshana V.Havaldar Reshma V.Patil Disha N.Moholkar Priyanka S.Magdum Akash P.Vadrale Kiran D.Pawar School of Nanoscience and Biotechnology Shivaji UniversityKolhapurMaharashtraIndia

The potential utility of gold nanoparticles(AuNPs)synthesized via different methods for biomedical applications vary greatly due to inherent differences in their surface *** the present study,we investigated the functionalization of AuNPs synthesized by chemical reduction,plant extract,and bacteria-mediated methods with 22 L-amino *** produced by bacteria-mediated(B_AuNPs)and plant-mediated(P_AuNPs)methods showed good potential,as they were able to be functionalized with six(histidine,lysine,methionine,phenylalanine,tryptophan,and tyrosine)and four(cystine,tryptophan,tyrosine,and valine)amino acids,*** contrast,AuNPs produced by chemical reduction(C_AuNPs)were not found to be suitable for *** functionalization conditions were found to be amino acid concentration of 20-25 mM and neutral pH(7)for P_AuNPs,whereas B_AuNPs tolerated more variable *** electrophoretic mobility of P_AuNPs after functionalization indicated that these nanoparticles were less sensitive than B_AuNPs to the deviations from optimal conditions.A significant change in mobility was observed when B_AuNPs were functionalized with either methionine or ***,the results of this study suggest that the suitability of the three differently synthesized AuNPs with amino acids is in the following order:B_AuNPs>P_AuNPs>C_AuNPs.

关键词： Gold nanoparticles Biogenic synthesis Amino acids Functionalization Electrophoretic mobility

Evaluation of L-dopa,proximate composition with in vitro anti-inflammatory and antioxidant activity of Mucuna macrocarpa beans:A future drug for Parkinson treatment

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Asian Pacific Journal of Tropical Biomedicine 2017年第12期7卷 1097-1106页

作者： Chetan Aware Ravishankar Patil Swaroopsingh Gaikwad Shrirang Yadav Vishwas Bapat Jyoti Jadhav Department of Biotechnology Shivaji UniversityVidyanagarKolhapurMaharashtraIndia Department of Biochemistry Shivaji UniversityVidyanagarKolhapurMaharashtraIndia Department of Botany Shivaji UniversityVidyanagarKolhapurMaharashtraIndia

Objective: To investigate L-3, 4-dihydroxyphenylalanine(L-dopa, anti-Parkinson drug),anti-inflammatory activity, proximate nutritional composition and antioxidant potential of Mucuna macrocarpa(M. macrocarpa) ***: L-dopa content was determined and quantified by high performance thin layer chromatography and reversed phase high-performance liquid chromatography(RPHPLC) methods. Anti-inflammatory activity was performed by in vitro protein denaturation inhibition and human red blood cell membrane stabilisation activity. Proximate composition and elemental analysis were also investigated. The antioxidant potential(2,2-diphenyl-1-picrylhydrazyl, N-N-dimethyl-phenylenediamine and ferric-reducing antioxidant power) of M. macrocarpa beans were evaluated by using different extraction solvents. The RP-HPLC analysis also quantified significant phenolics such as gallic acid, tannic acid, p-hydroxybenzoic acid and p-coumaric ***: RP-HPLC quantification revealed that M. macrocarpa beans contain a high level of L-dopa [(115.41 ± 0.985) mg/g] which was the highest among the Mucuna species from Indian sub-continent. Water extract of seed powder showed strong antiinflammatory and antioxidant potential. Proximate composition of M. macrocarpa beans revealed numerous nutritional and anti-nutritional components. RP-HPLC analysis of major phenolics such as tannic acid(43.795 mg/g), gallic acid(0.864 mg/g), p-coumaric acid(0.364 mg/g) and p-hydroxybenzoic acid(0.036 mg/g) quantified successfully from M. macrocarpa beans ***: This study suggests that M. macrocarpa is a potential source of L-dopa with promising anti-inflammatory, antioxidant and nutritional benefits.

关键词： Anti-inflammatory Antioxidants L-dopa Mucuna macrocarpa Oxidative stress Parkinson’s disease