检索结果-南通市图书馆

An overview of deep eutectic solvents:Alternative for organic elec.r.lytes,aqueous systems&ionic liquids for elec.r.chemical energy storage

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Energy chemistry 2023年第7期82卷 592-626,I0013页

作者： Akshay Sharma renuka Sharma ramesh c.Thakur Lakhveer Singh Department of chemistry Himachal Pradesh UniversitySummer HillShimla171005Himachal PradeshIndia Department of chemistry Sardar Patel UniversityMandi175001Himachal PradeshIndia

As the demand for sustainable energy sources continues to rise,the need for efficient and reliable energy storage systems becomes *** order to effectively store and distribute renewable energy,new and innovative solutions must be *** review examines the deep eutectic solvents(DESs)as a green,safe,and affordable solution for the elec.r.chemical energy storage and conversion field,offering tremendous opportunities and a promising *** are a class of environment-friendly solvents known for their low toxicity and unique properties,such as their good conductivity,high thermal stability,and *** review explores the fundamentals,preparations,and various interactions that often predominate in the formation of DESs,the properties of DESs,and how DESs are better than traditional solvents involving cost-ineffective and unsafe organic elec.r.lytes and ionic liquids as well as inefficient aqueous systems due to low energy density for elec.r.chemical energy storage ***,a particular focus is placed on the various elec.r.chemical applications of DESs,including their role in the elec.r.lytes in batteries/supercapacitors,elec.r.polishing and elec.r.deposition of metals,synthesis of elec.r.de materials,recycling of elec.r.des,and their potential for use in cO_(2)*** review concludes by exploring the challenges,research gaps,and future potential of DESs in elec.r.chemical applications,providing a comprehensive overview,and highlighting key considerations for their design and use.

关键词： Deep eutectic solvent Green solventHole theory Energy storage devices Aqueous elec.r.lyte

One pot synthesis of TiO_2:Eu^(3+) hierarchical structures as a highly specific luminescent sensing probe for the visualization of latent fingerprints

在线全文

学校读者我要写书评

暂无评论

Journal of rare Earths 2019年第2期37卷 134-144页

作者： K.r.Venkatesha Babu c.G.renuka r.B.Basavaraj G.P.Darshan H.Nagabhushana Department of Physics Jnana Bharathi Campus Bangalore University Department of Physics Govt.Science College Prof.c.N.r.rao centre for Advanced Materials Tumakuru University Department of Physics Acharya Institute of Graduate Studies

In the present work, TiO2:Eu^(3+) (1 mol%e11 mol%) nano powders(NPs) were prepared via a facile one-pot hydrothermal method by using Epigallocatechin Gallate(EGcG) as bio-surfactant. The optimized TiO2:Eu^(3+) (5 mol%) NPs can be used as fluorescent labeling agent for visualizing of latent fingerprints(LFPs) on various porous and non-porous surfaces. The obtained results exhibit well defined ridge details with high sensitivity, selectivity, and low background hindrance which show greater advantages as compared to conventional powders. We demonstrated the viability of high-performance sec.r.ty labels thorough excellent luminescence for practical anti-mimetic applications. Morphology of the prepared samples is highly dependent on pH, concentration of the bio-surfactant, temperature and time ***(PL) emission spec.r. exhibit intense red emission at ~ 615 nm due to elec.r.c dipole transition(~5 D_0/~7 F_2). Photometric(cIE and ccT) results clearly show the intense warm red emission of the optimized samples. Therefore, this work offers a superior and universal luminescent label, which can be applied to visualize miniature LFPs particulars for individualization and consequently display great prospective in forensic investigation.

关键词： Nano powder Photoluminescence Latent fingerprints Bio-surfactant rare earths

Luminescent characterization of rare earth Dy^(3+) ion doped TiO_2 prepared by simple chemical co-precipitation method

在线全文

学校读者我要写书评

暂无评论

Journal of rare Earths 2019年第1期37卷 24-31,M0003页

作者： Mohamed Zikriya Y.F.Nadaf P.Vijai Bharathy c.G.renuka Department of Physics Bangalore University Department of Physics and research center Maharani's Science College for Women Department of Physics CBM College

Pure and rare-earth ion (Dy^(3+)) doped TiO_2 nanomaterials were prepared through a chemical coprecipitation method. The chemical composition, micro structure and optical properties were characterized using X-ray diffraction (XrD), transmission elec.r.n microscopy (TEM), X-ray photoelec.r.n spec.r.scopy (XPS), UV-visible spec.r.scopy and photo luminescence (PL). XPS analysis reveals that Dy^(3+)ions are preferentially occupied in the TiO_2 crystallite lattices. Both the XrD and TEM analyses confirm that both the pure and Dy doped TiO_2 are in pure anatase phase and in nano size range, respectively. Also it is found that the maximum solubility limit for Dy^(3+) ions is found to be 0.4%in TiO_2 matrix, above which it occupies interstitials and/or crystallite surface of TiO_2 nanocrystals. From the UV-Vis spec.r.scopy studies it is found that Dy doping induces blue shift in TiO_2. From the PL analysis it is found that doping Dy^(3+) improves the luminescence behavior in comparison with the pure TiO_2 ***, doping very low concentrations of Dy^(3+) greatly alters the structural morphology and directly increases the luminescence behavior of TiO_2 suitable for advanced optoelec.r.nic applications.

关键词： rare earth ions TiO2 Dy^3+ion Microstructure Photoluminescence

Design of soft magnetic materials

在线全文

学校读者我要写书评

暂无评论

npj computational Materials 2022年第1期8卷 17-26页

作者： Ananya renuka Balakrishna richard D.James Aerospace and Mechanical Engineering University of Southern CaliforniaLos AngelesCA90089USA Aerospace and Engineering Mechanics University of MinnesotaMinneapolisMN55455USA

We present a strategy for the design of ferromagnetic materials with exceptionally low magnetic hysteresis,quantified by *** this strategy,we use a micromagnetic algorithm that we have developed in previous research and which has been validated by its success in solving the“Permalloy Problem”—the well-known difficulty of predicting the composition 78.5%Ni of the lowest coercivity in the Fe–Ni system—and by the insight it provides into the“coercivity Paradox”of ***,the design strategy predicts that cubic materials with large saturation magnetization ms and large magnetocrystalline anisotropy constant κ_(1) will have low coercivity on the order of that of Permalloy,as long as the magnetostriction constantsλ_(100),λ_(111)are tuned to special *** explicit prediction for a cubic material with low coercivity is the dimensionless number(c_(11)−c_(12))λ_(100)^(2)/(2_(κ_(1)))=81 for〈100〉easy *** results would seem to have broad potential application,especially to magnetic materials of interest in energy research.

关键词： magnetic cubic exceptional

SBA-16负载金属氧化物催化剂合成、表征及催化cO氧化反应活性（英文）

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

催化学报 2015年第8期36卷 1237-1241页

作者： N.K.renuka K.Anas c.U.Aniz 卡利卡特大学化学系印度南方化学公司研发部

将V2O5,ceO2和cuO分散到提取自稻米壳的SBA-16上,考察了其催化cO氧化反应活性,并采用X射线衍射、扫描电镜、透射电镜、程序升温还原和紫外漫反射光谱对所制催化剂进行了表征.结果表明,掺杂cuO的介孔氧化硅是一种有前景的催化剂,其cO转... 详细信息

将V2O5,ceO2和cuO分散到提取自稻米壳的SBA-16上,考察了其催化cO氧化反应活性,并采用X射线衍射、扫描电镜、透射电镜、程序升温还原和紫外漫反射光谱对所制催化剂进行了表征.结果表明,掺杂cuO的介孔氧化硅是一种有前景的催化剂,其cO转化率可达98%以上.

关键词：稻米壳灰介孔氧化硅 SBA-16 金属氧化物催化剂一氧化碳氧化

c.r.on Isotope Discrimination is not c.r.elated with Transpiration Efficiency in Three cool-Season Grain Legumes(Pulses)

在线全文

学校读者我要写书评

暂无评论

Journal of Integrative Plant Biology 2007年第10期49卷 1478-1483页

作者： Neil c.Turner Jairo A.Palta renuka Shrestha c.r.stiane Ludwig Kadambot H.M.Siddique David W.Turner centre for Legumes in Mediterranean Agriculture M080The University of Western Australia35 Stirling HighwayCrawleyWA 6009Australia centre for Legumes in Mediterranean Agriculture M080The University of Western Australia35 Stirling HighwayCrawleyWA 6009Australia CSIRO Plant IndustryPrivate Mail Bag No.5WembleyWA 6913Australia School of Plant Biology M084Institute of AgricultureThe University of Western Australia35 Stirling HighwayCrawleyWA 6009Australia cSIrO Plant Industry Private Mail Bag No.5WembleyWA 6913Australia centre for Legumes in Mediterranean Agriculture M080The University of Western Australia35 Stirling HighwayCrawleyWA 6009Australia School of Plant BiologyM084Institute of AgricultureThe University of Western Australia35 Stirling HighwayCrawleyWA 6009Australia

The c.r.on isotope discrimination （δ^13c） of leaves has been shown to be c.r.elated with the transpiration efficiency of leaves in a wide range of species. This has led to δ^13c being used in breeding programs to select for improved transpiration efficiency. The c.r.elation between δ^13c and transpiration efficiency was determined under well-watered conditions during the vegetative phase in six genotypes of lentil （Lens culinaris Medikus）, six genotypes of chickpea （cic.r.rietinum L.） and 10 cultivars of narrow-leafed lupin （Lupinus angustifolius L.）. Biomass （dry matter） accumulation and water use （transpiration） varied among the genotypes in all three species and transpiration efficiency was 40% to 75% higher in the most efficient compared with the least efficient genotypes. However, δ^13c and transpiration efficiency were not significantly c.r.elated in any of the species. This suggests that the δ^13c technique cannot be used in selection for transpiration efficiency in the three grain legumes （pulses） studied.

关键词： biomass accumulation breeding chickpea lupin cic.r.anetinum Lens culinans lentil Lupinus angustifofius water use.

Screening and molecular characterization of Serratia marcescens VITSD2： A strain producing optimum serratiopeptidase

在线全文

学校读者我要写书评

暂无评论

Frontiers in Biology 2013年第6期8卷 632-639页

作者： c. Subathra DEVI renuka ELIZABETH JOSEPH Harini SArAVANAN S. Jemimah NAINE V. Mohana SrINIVANSAN School of Biosciences and Technology VIT University VeIlore Tamil Nadu India

The c.r.ent work was attempted to isolate and characterize the serratiopeptidase producing Serratia sp. Among the 10 bacterial isolates 7 strains were identified as Serratia sp. Out of 7 strains one showed potent proteolytic activity and selected for further studies. Based on the morphological, biochemical and molecular characterization, the potent isolate （rH03） was identified as Serratia marcescens （GenBank accession number： Kc961637） and the strain was designated as Serratia marcescens VITSD2. The production of serratiopeptidase was c.r.ied out in trypticase soya broth and the enzyme was partially purified using ammonium sulfate precipitation and dialysis. The specific activity was determined by casein hydrolysis assay and was found to be 12.00, 21.33, and 25.40 units/rag for crude, precipitated and dialysed samples. The molecular weight of the protease was determined by SDS-PAGE and it was found to be 50 kDa. The antibacterial activity of the produced serratiopeptidase showed moderate activity against Pseudomonas aeruginosa MTcc No. 4676 （12 mm） and Escherichia coli MTcc No. 1588 （15 mm）.

关键词： Serratiopeptidase Serratia marcescens VITSD2 antibacterial activity

Sinonasal Undifferentiated c.r.inoma—A case report

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Otolaryngology and Head & Neck Surgery 2014年第6期3卷 382-386页

作者： c. Aparna I. V. renuka Department of Pathology Guntur Medical College Guntur India

Sinonasal tumors with neuroendocrine differentiation are uncommon. They arise from schneiderian epithelium. The authors reported a case in a fifty-six years old female patient who came with complaints of headache and epistaxis. Differential diagnosis and review of literature are presented in detail. This case is presented in view of its rarity.

关键词： Sinonasal Undifferentiated c.r.inoma Sinonasal Neuro Endocrine c.r.inoma Schneiderian Epithelium

Synthesis of c-8 alkyl xanthines by pentaamminecobalt(III) complex

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Advances in Biological chemistry 2013年第6期3卷 521-524页

作者： renuka Suravajhala Department of Science Systems and Models Roskilde University Roskilde Denmark

Alkyl xanthines underwent selective homolytic aromatic substitution at c-8 position with alkyl groups of pentaamminecobalt(III) complex. In this process of synthesis, we used monoalkyl hydrazines as the radical source in aqueous ammonia solution. Evidence supporting coordination of the alkyl hydrazine to pentaamminecobalt(III) complex by radical trapping was in good agreement with literature. The products were characterized using Gc-MS and 1H, 14N and 59co NMr spec.r.scopy.

关键词： Alkyl Hydrazine radical Alkylation caffeine Homolytic Aromatic Substitution Pentaamminecobalt(III)