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Vertically aligned one-dimensional ZnO/V2O5 core-shell hetero-nanostructure for photoelectrochemical water splitting

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journal of Energy Chemistry 2020年第10期29卷 262-274页

作者： Tian-Feng Hou Muhammad Ali johar Ramireddy Boppella Mostafa Afifi Hassan swati j.patil Sang-Wan Ryu Dong-Weon Lee MEMS and Nanotechnology Laboratory School of Mechanical EngineeringChonnam National UniversityGwangju 61186Republic of Korea Center for Next-generation Sensor Research and Development Chonnam National UniversityGwangju 61186Republic of Korea Department of Physics Chonnam National UniversityGwangju 61186Republic of Korea Nanomaterials Laboratory Inorganic and Physical Chemistry DivisionCSIR-Indian Institute of Chemical TechnologyHyderabad 500007TelanganaIndia

The vertically aligned one-dimensional(1 D)core-shell structure can maximize the exposure and use of the functionally active surface while maintaining the geometric effects caused by the underlying ***,we have fabricated 1 D vertically aligned ZnO/V2O5 core-shell hetero-nanostructure nanorod arrays(NRs)for photoelectrochemical(PEC)water ***/V2O5 NRs were prepared through the hydrothermal growing of ZnO NRs and then radio frequency(RF)magnetron sputtering deposition of V2O5 for 300,600 and 900 *** photocurrent density of ZnO/V2O5-based photoanodes was gradually increased with the sputtering time,reaching the maximum value of 1.21 m A/cm^2 at 1.23 V *** hydrogen electrode(RHE)for ZnO/V2O5-600,whereas for pure ZnO-based photoanode was 0.42 mA/cm^*** incident photon to electron conversion efficiency(IPCE)of ZnO/V2O5-600 evaluated to be 82.3%which was 2.3 times higher than that of ZnO(36.4%).The improved PEC performance of ZnO/V2O5-600 is because the core-shell structure with a moderate thickness of the V2O5 layer has the extremely high carrier density,largest electrochemically active surface area(ECSA),largest carrier density,lowest charge recombination rate,and the longest lifetime of e-h pairs due to the formation of the staggered gap *** study provides an effective way to design and fabrication of hetero-nanostructures for highefficiency photoelectrodes.

关键词： ZnO/V2O5 core-shell hetero-nanostructure Staggered heterojunction PEC water splitting

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High energy superstable hybrid capacitor with a self-regulated Zn/electrolyte interface and 3D graphene-like carbon cathode

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InfoMat 2022年第10期4卷 62-77页

作者： Nilesh R.Chodankar swati j.patil Sangjin Lee jaeho Lee Seung-Kyu Hwang Pragati A.Shinde Indrajit V.Bagal Smita V.Karekar Ganji Seeta Rama Raju Kugalur Shanmugam Ranjith Deepak P.Dubal Yun-Suk Huh Young-Kyu Han Department of Energy and Material Engineering Dongguk University-SeoulSeoulRepublic of Korea Department of Biological Engineering NanoBio High-Tech Materials Research CenterInha UniversityIncheonRepublic of Korea Department of Biological Sciences and Bioengineering Inha UniversityIncheonRepublic of Korea Research Institute of Sciences and Engineering University of SharjahSharjahUnited Arab Emirates Department of Physics Chonnam National UniversityGwangjuRepublic of Korea School of Chemistry and Physics Centre for Materials ScienceQueensland University of Technology(QUT)BrisbaneQueenslandAustralia

Rechargeable aqueous zinc ion hybrid capacitors(ZIHCs),as an up-and-comer aqueous electrochemical energy storage system,endure in their infancy because of the substandard reversibility of Zn anodes,structural deterioration of cathode materials,and narrow electrochemical stability ***,a scalable approach is described that addresses Zn-anode/electrolyte interface and cathode materials associated deficiencies and boosts the electrochemical properties of *** Zn-anode/electrolyte interface is self-regulated by alteration of the traditional Zn2+electrolyte with Na-based supporting salt without surrendering the cost,safety,and green features of the Zn-based system which further validates the excellent reversibility over 1100 h with suppressed hydrogen *** deficits of cathode materials were overcome by using a high-mass loaded,oxygen-rich,3D,multiscaled graphene-like carbon(3D MGC)*** to the multiscaled texture,high electronic conductivity,and oxygen-rich functional groups of 3D MGC,reversible redox capacitance was obtained with a traditional adsorption/desorption *** ZIHCs containing the modified electrolyte and an oxygen-rich 3D MGC cathode resulted in battery-like specific energy(203 Wh kg1 at 1.6 A g^(-1))and supercapacitor-type power capability(4.9 kW kg1 at 8 A g^(-1))with outstanding cycling durability(96.75%retention over 30000 cycles at 10 A g^(-1)).These findings pave the way toward the utilization of highly efficient ZIHCs for practical applications.

关键词： electrolyte additive graphene-like carbon interface multivalent ion capacitor zinc

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An effective digital audio watermarking using a deep convolutional neural network with a search location optimization algorithm for improvement in Robustness and Imperceptibility

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High-Confidence Computing 2023年第4期3卷 47-59页

作者： Abhijit j.patil Ramesh Shelke Computer Engineering Pacific Academy of Higher Education and Research UniversityUdaipur 313003India Electronics and Telecommunications University of MumbaiMumbai 400032India

Watermarking is the advanced technology utilized to secure digital data by integrating ownership or copyright *** of the traditional extracting processes in audio watermarking have some restrictions due to low reliability to various ***,a deep learning-based audio watermarking system is proposed in this research to overcome the restriction in the traditional *** implication of the research relies on enhancing the performance of the watermarking system using the Discrete Wavelet Transform(DWT)and the optimized deep learning *** selection of optimal embedding location is the research contribution that is carried out by the deep convolutional neural network(DCNN).The hyperparameter tuning is performed by the so-called search location optimization,which minimizes the errors in the *** experimental result reveals that the proposed digital audio watermarking system provides better robustness and performance in terms of Bit Error Rate(BER),Mean Square Error(MSE),and Signal-to-noise *** BER,MSE,and SNR of the proposed audio watermarking model without the noise are 0.082,0.099,and 45.363 respectively,which is found to be better performance than the existing watermarking models.

关键词： Search location optimization algorithm Deep convolutional neural network DWT Robustness Imperceptibility

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Laboratory investigation of compaction characteristics of fresh and degraded municipal solid waste

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Waste Disposal and Sustainable Energy 2020年第4期2卷 305-312页

作者： Mahesh Endait swati patil Department of Civil Engineering School of Engineering and TechnologySandip UniversityNashikIndia

com-pacted MSW increases the placement efficiency and thus reduces the space requirement for *** composition of MSW,degradation,and compactive efforts are the key factors that control the compaction characteristics of *** paper presents the laboratory investigation of compaction characteristics of fresh and aged MSW at a wide range of compactive *** MSW(S_(1)),Windrows sample(S_(2))of an age of 2 months,5-year-old MSW(S_(3)),10-year-old MSW(S_(4)),and 15-year-old MSW(S_(5))were collected from the working phase of the solid waste management site,Vilholi Nasik,(MH)*** was carried in 1000 mL capacity mold under four different energy levels,i.e.,552(E_(1)),1125(E_(2)),2682(E_(3)),and 5364(E4)kj/m^(3).The results showed that the maximum dry density(γ_(dmax))was observed less in the S_(1)sample at the standard compactive *** the age of the sample increase from fresh to 5 years,γ_(dmax)was more with lesser optimum moisture content(w_(opt))because of the completion of the biodegradation *** further change in compaction characteristics was observed once the biodegradation process was *** study shows that the particle size of MSW gets reduced as the age of the sample *** reduces the particle size of MSW is one of the contributing factors to increasingγ_(dmax).When compactive energy is changed from E_(1)to E4 theγ_(dmax)increased and w_(opt)decreased for all the samples.A normalized w_(opt)and compaction energy correlation is proposed in this *** correlation can get compaction characteristics of fresh and aged MSW at any compactive effort.

关键词： Compaction Municipal solid waste Degradation Compaction efforts

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A novel herbal combination ameliorates ovarian dysfunction and regulates altered biochemical parameters in rats with letrozole-induced polycystic ovary syndrome

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Asian pacific journal of Reproduction 2023年第1期12卷 23-34页

作者： Sunita Shailajan Sasikumar Menon swati Singh Yugandhara patil Herbal Research Lab(Department of Botany) Ramnarain Ruia Autonomous CollegeMatungaMumbai-400019India Therapeutic Drug Monitoring Laboratory Sion(East)Mumbai-400022India

Objective:To investigate the potential activity of novel herbal combination and novel herbal formulation(syrup)in female Sprague Dawley rats with letrozole-induced polycystic ovary syndrome(PCOS).Methods:Forty-two rats were randomly divided into seven groups with six rats in each *** 1 received 0.5%carboxy methylcellulose orally for 37 days and served as the normal control *** 2 was orally administered with letrozole of 1 mg/kg for 21 days and served as the PCOS induction group without *** 3 to 7 were administered with letrozole of 1 mg/kg for 21 days orally to induce PCOS,and then respectively received clomiphene citrate at 1 mg/kg,100 and 200 mg/kg of novel herbal combination,200 mg/kg of novel herbal formulation(syrup),and 400 mg/kg of marketed formulation of Pushyanuga churna,once daily for 15 *** of the novel herbal combination and its syrup formulation were evaluated on the hormonal profile,the levels of antioxidants,the lipid profile and on the ovarian morphology,using letrozole-induced PCOS model in ***:Letrozole caused alterations in hormonal levels and lipid levels similar to PCOS and ovarian histology showed presence of ovarian cysts confirming the induction of PCOS in *** treatment with the novel herbal combination and its syrup formulation in PCOS-induced rats,the altered hormonal and lipid profiles showed significant recovery to normal *** histology confirmed the restoration of folliculogenesis in the PCOS-induced *** treatment with the syrup formulation of novel herbal combination was found to be more effective than novel herbal combination and showed better recovery in various parameters *** results of the study,however,suggested that treatment with novel herbal combination and its syrup formulation provided minimal protection against oxidative stress caused due to the induction of ***:The integrated approach for management of PCOS is to counterbalance the limita

关键词： Polycystic ovarian syndrome Polyherbal combination Letrozole Pushyanuga churna Clomiphene citrate Histopathology Biochemical Herbal

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A multiwavelength view of the ISM in the merger remnant galaxy Fornax A

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Research in Astronomy and Astrophysics 2013年第8期13卷 885-898页

作者： swati Pralhadrao Deshmukh Bhagorao Tukaram Tate Nilkanth Dattatray Vagshette Sheo Kumar Pandey Madhav Khushalrao patil Department of Physics Institute of Science Department of Physics Balbhim Arts Science and Commerce College School of Physical Sciences Swami Ramanand Teerth Marathwada University School of Studies in Physics & Astrophysics Pandit Ravishankar Shukla University

We present multi-wavelength imagery of the merger remnant galaxy NGC 1316 with an objective to study the dust content and its association with the other phases of the interstellar medium. Color-index maps as well as extinction maps derived for this galaxy reveal an intricate and complex dust morphology in NGC 1316, i.e. there is a prominent lane in the inner part, while at about 6-7 kpc it apparently takes the form of an arc-like pattern extending along the northeast direction. In addition to this, several other dust clumps and knots are also evident in this galaxy. The dust emission mapped using Spitzer data at 8 μm indicates even more complex morphological structures of the dust in NGC 1316. The extinction curve derived over the optical to near-IR bands closely follows the standard Galactic curve, suggesting similar properties of the dust grains. The dust content of NGC 1316, estimated from optical extinction, is ,- 2.13 × 10^5 M⊙. This is a lower limit compared to that estimated using the IRAS flux densities of ,-5.17× 10^6 M⊙ and the flux densities at 24, 70 and 160 p.m from MIPS ,-3.2× 10^7 M⊙. High resolution Chandra observations of this merger remnant system have provided an unprecedented view of the complex nature exhibited by the distribution of hot gas in NGC 1316, which closely matches the morphology of ionized gas and to some extent also the dust. X-ray color-color plots for the resolved sources within the optical D25 extent of NGC 1316 have enabled us to separate them into different classes.

关键词： galaxies individual (NGC 1316) - galaxies: ISM - X-rays: ISM - (ISM:) dust - extinction - galaxies: elliptical and lenticular, cD

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Fabrication of Functional Silica-Myoglobin Core-Shell Nanoparticles

Fabrication of Functional Silica-Myoglobin Core-Shell Nanopa...

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The 3rd International Conference of Bionic Engineering(ICBE’10)

作者： Avinash j.patil Alex Brogan Stephen Mann Department of Chemistry and Biology College of ScienceNational University of Defense Technology Centre for Organized Matter Chemistry School of Chemistry University of Bristol

Proteins and enzymes display excellent recognizing, binding and catalytic properties that can be exploited to produce functional nanomaterials for biosensing and biocatalytic applications. However, fragile nature of the biomolecules seriously hampers their application potential in biotechnology. As a result, various methods such as sol-gel chemistry, intercalation or molecular wrapping using organoclay oligomers or via microemulsion methods have been used to produce bioinorganic nanocomposites with functionally intact biomolecules. Herein, we show a simple method for the encapsulation of single heme protein using inorganic host matrix. In general, aqueous mixture of tri block-co-polymer such as PEO-PPO-PEO and myoglobin produced polymer-protein nanoconjugates where protein molecules were specifically associated with the hydrophilic-PEO functionality of the block-co-polymer. Subsequently, dispersion of lyophilized powders of protein-polymer composite in cyclohexane produced reverse-micelles contained intact protein molecules. Injection of stichiometric amounts of TMOS precursor to above solution produced discrete core-shell nanoparticles containing met-myoglobin. Various physico-chemical characterization techniques such as Transmission electron microscopy （TEM）, Energy disperse X-ray（EDX）, Fourier-transform infrared spectroscopy spectra （FTIR）, and UV-vis spectroscopy were used to characterize bio-inorganic nanoconjugates. TEM analysis of samples taken directly from the reverse-micelle solution showed the presence of discrete spheroidal electron-dense nanoparticles with mean diameter of 4.5 nm and was in good agreement with the molecular size of the native myoglobin （4.5 x 2.5 x 3.5 nm）, which suggested that individual protein molecule was wrapped with a ultrathin sheath of silica. EDX analysis of bio-inorganic nanoconjugates indicated the presence of elements Fe, S from myoglobin and Si from inorganic matrix. FTIR spectroscopy showed vibration modes at 460 cm-1 （Si-

关键词： encapsulation core-shell particle myoglobin silica

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Comparative cytotoxicity of nanoparticles and ions to Escherichia coli in binary mixtures

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journal of Environmental Sciences 2017年第5期29卷 11-19页

作者： swati Srivastaua Arun Kumar Department of Civil Engineering Indian Institute of Technology Delhi New Delhi 110016 India

The objective of this study was to understand toxicity of mixture of nanoparticles （NPs）（ZnO and TiO2） and their ions to Escherichia coll. Results indicated the decrease in percentage growth of E. coli with the increase in concentration of NPs both in single and mixture setups. Even a small concentration of I mg/L was observed to be significantly toxic to E. coli in binary mixture setup （exposure concentration： 1 mg/L ZnO and 1 mg/L TiO2; 21.15% decrease in plate count concentration with respect to control）. Exposure ofE. coli to mixture of NPs at 1000 mg/L （i.e., 1000 mg/L ZnO and 1000 mg/L TiO2） resulted in 99.63% decrease in plate count concentration with respect to control. Toxic effects of ions to E. coli were found to be lesser than their corresponding NPs. The percentage growth reduction was found to be 36% for binary mixture of zinc and titanium ions at the highest concentration （i.e., 803.0 mg/L Zn and 593.3 mg/L Ti where ion concentrations are equal to the Zn ions present in 1000 mg/L ZnO NP solution and Ti＋4 ions present in 1000 mg/L TiO2 NP solution）. Nature of mixture toxicity of the two NPs to E. coli was found to be antagonistic. The alkaline phosphatase （Alp） assay indicated that the maximum damage was observed when E. coli was exposed to 1000 mg/L of mixture of NPs. This study tries to fill the knowledge gap on information of toxicity of mixture of NPs to bacteria which has not been reported earlier.

关键词： E. coli Zinc oxide nanoparticles Titanium dioxide nanoparticles Mixture toxicity Alkaline phosphatase assay

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Evaluation of Various Factors Affecting Bioconversion of L-Tyrosine to L-DOPA by Yeast Yarrowia lipolytica-NCIM 3450 Using Response Surface Methodology

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Natural Products and Bioprospecting 2014年第3期4卷 141-147页

作者： swati T.Gurme Shripad N.Surwase Sushama A.patil jyoti P.jadhav Department of Biotechnology Shivaji UniversityVidyanagarKolhapur 416004India Department of Microbiology Shivaji UniversityKolhapur 416004India

3,4-Dihydroxy L-phenylalanine(L-DOPA)is considered a potent drug for the treatment of Parkinson *** and nutritional parameters where optimized by using Yarrowia lipolytica-NCIM 3450 to accomplished the highest production of *** of critical components were completed by using a Plackett–Burman design,while further optimization was carried out using the Box–Behnken *** optimized factor levels predicted by the model were pH 6.1,1.659 g L^(-1)yeast extract,1.491 g L^(-1)L-tyrosine and 0.0290 g L^(-1)*** predicted yield of L-DOPA with these levels was 1.319 g L^(-1),while actual yield obtained was 1.273 g L^(-1).The statistical analysis revealed that model is significant with F value 19.55 and R2 value *** process resulted in a 3.594-fold increase in the yield of LDOPA.L-DOPA was confirmed by HPTLC and HPLC ***,Yarrowia lipolytica-NCIM 3450 has potential to be a new source for the production of L-DOPA.

关键词： L-DOPA L-tyrosine RSM Yarrowia lipolytica

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Leaf Traits and Antioxidant Defense for Drought Tolerance During Early Growth Stage in Some Popular Traditional Rice Landraces from Koraput, India

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Rice science 2017年第4期24卷 207-217页

作者： swati Sakambari MISHRA Debabrata PANDA Department of Biodiversity and Conservation of Natural Resources Central University of Orissa Koraput 764021 Odisha India

Three popular traditional rice landraces, namely Kalajeera, Machakanta and Haladichudi, from Koraput, India were used to analyse the leaf traits and antioxidant defence for drought tolerance. When rice plants were exposed to different levels of drought stress by varying concentrations of polyethylene glycol （PEG） 6000, seed germination and growth parameters were significantly declined in all the rice landraces compared to the control. Drought stress also altered the leaf phenotypic traits based on chlorophyll fluorescence parameters and chlorophyll index, with more significant differences in susceptible variety IR64 than in traditional landraces. Furthermore, activities of antioxidative enzymes and proline and protein contents overtly increased under drought stress. The traditional rice landraces showed higher relative ratios for different parameters compared to the susceptible variety IR64. Taken together, the traditional landraces had superior leaf physiological efficiency compared to the susceptible and tolerant check varieties under drought stress.

关键词： antioxidant enzyme drought stress landrace phenotype rice leaf trait polyethylene glycol

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