检索结果-南通市图书馆

Structural,morphological,optical and antibacterial performances of rare earth(Sm)-doped ZnO nanorods

Journal of Rare Earths 2024年第11期42卷 2119-2127,I0005页

作者： A.Ravi J.Samuel S.Sahaya Jude Dhas S.Usharani Turibius Simon D.Senthil kumar S.K.Jasmin Vijitha A.Sivakumar raju suresh kumar C.S.Biju Department of Physics University College of EngineeringKancheepuram631552TamilnaduIndia Department of Physics and Research Centre Malankara Catholic CollegeMariagiri629153TamilnaduIndia Manonmaniam Sundaranar University Abishekapatti627012TirunelveliTamilnaduIndia Saveetha School of Engineering Saveetha Institute of Medical and Technical SciencesSaveetha UniversityChennaiTamil Nadu602105India Department of Chemistry S.I.V.E.T CollegeGowrivakkamChennai600073TamilnaduIndia Department of Biotechnology Vivekanandha College of Arts and Science for Woman(Autonomous)Elayampalam637205TiruchengodeNamakkalTamilnaduIndia Department of Physics Vel Tech Rangarajan Dr.Sagunthala R&D Institute of Science and TechnologyAvadiChennai600062India Department of Physics&Research Centre Muslim Arts CollegeThiruvithancode629174TamilnaduIndia Key Laboratory of High-temperature and High-pressure Study of the Earth's Interior Institute of GeochemistryChinese Academy of SciencesGuiyang550081China Department of Chemistry College of ScienceKing Saud UniversityP.O.Box 2455Riyadh11451Saudi Arabia Department of Physics St.Alphonsa College of Arts and ScienceSoosaipuramKarinkal629157Tamil NaduIndia

The significant rise of ultra-violet(UV) radiation and pathogenic infectious bacteria poses a serious threat to global *** researchers' interests are attracted by novel materials with strong UVblocking ability,antibacterial activity and low toxicity to other *** this case,a simple wet chemical method with different annealing temperatures(400,500,and 600℃) was employed to create highly effective rare earth(Sm)-doped ZnO ***(101) plane of wurtzite ZnO shifts towards a lower angle with increasing annealing temperature,according to the X-ray diffraction(XRD) study findings,which additionally establishes the consequence of lattice *** of doublet peaks of Sm 3d(Sm 3d_(5/2) and Sm 3d_(3/2)) in the X-ray photoelectron spectroscopy(XPS) spectrum clearly validates the substitution of Sm^(3+) ions in the 500℃-annealed *** 500℃-annealed nanorods exhibit combined performances of the wide band gap,improved UV absorbance,and vivid green luminescent emission(563 nm).Additio nally,the nanorods have favorable UV-blocking execution of 96% for UVA at 360 nm,92% for UVB at 320 nm,and 57% for UVC at 225 nm,which is greater than the majority of ZnO-related materials that have been reported up to this *** doping is also appropriate for improving bacterial inhibition against the two studied strains(Escherichia coli and Staphylococcus aureus),in addition to the intriguing features discussed ***,with maximum inhibition zone diameters of 20±0.72 and 18±0.57 mm,respectively,these nanorods exhibit high inhibitory action against *** and *** bacterial *** rare earth-doped material developed during the current experiment,which was annealed at 500℃,could potentially serve as an effective replacement for UV-blocking and antibacterial material,especially for biomedical applications.

关键词： Wet chemical method Rare earth doping Metal oxide UV-Shielding Bacterial inhibition

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Unsupported nanoporous palladium‐catalyzed chemoselective hydrogenation of quinolines:Heterolytic cleavage of H_2 molecule

引用

Chinese Journal of Catalysis 2018年第11期39卷 1746-1752页

作者： Ye Lu Yoshinori Yamamoto Abdulrahman I.Almansour Natarajan Arumugam raju suresh kumar Ming Bao State Key Laboratory of Fine Chemicals Dalian University of TechnologyDalian 116023LiaoningChina Department of Chemistry Graduate School of ScienceTohoku UniversitySendai 980‐8578Japan Research Organization of Science and Technology Ritsumeikan UniversityKusatsuShiga 525‐8577Japan Department of Chemistry College of SciencesKing Saud UniversityP.O.Box 2455Riyadh 11451Saudi Arabia

An efficient and highly chemoselective heterogeneous catalyst system for quinoline hydrogenation was developed using unsupported nanoporous palladium(PdNPore).The PdNPore‐catalyzed chemoselective hydrogenation of quinoline proceeded smoothly under mild reaction conditions(low H2 pressure and temperature)to yield 1,2,3,4‐tetrahydroquinolines(py‐THQs)in satisfactory to excellent *** synthetically useful functional groups,such as halogen,hydroxyl,formyl,ethoxycarbonyl,and aminocarbonyl groups,remained intact during the quinoline *** palladium was leached from PdNPore during the hydrogenation ***,the catalyst was easily recovered and reused without any loss of catalytic *** results of kinetic,deuterium‐hydrogen exchange,and deuterium‐labeling experiments indicated that the present hydrogenation involves heterolytic H2 splitting on the surface of the catalyst.

关键词： Nanoporous materials Palladium Quinoline Chemoselective hydrogenation Heterogeneous catalyst

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Carboxylative Suzuki coupling reactions of benzyl chlorides with allyl pinacolborate catalyzed by palladium nanoparticles

引用

Chinese Journal of Catalysis 2018年第7期39卷 1258-1262页

作者： Jian Sun Jiasheng Wang Xiujuan Feng Yoshinori Yamamoto Abdulrahman I.Almansour Natarajan Arumugam raju suresh kumar Ming Bao State Key Laboratory of Fine Chemicals Dalian University of TechnologyDalian 116023LiaoningChina School of Petroleum and Chemical Engineering Dalian University of TechnologyPanjin 124221Liaoning China Department of Chemistry Graduate School of Science Tohoku UniversitySendai 980-8578Japan Research Organization of Science and Technology Ritsumeikan UniversityKusatsuShiga 525-8577Japan Department of Chemistry College of Sciences King Saud UniversityP.O.Box 2455Riyadh 11451Saudi Arobia

Palladium-catalyzed carboxylative Suzuki coupling reactions of benzyl chlorides with allyl pinacol-borate were successfully conducted in the absence of any extra ligand to produce β,γ-unsaturated esters in satisfactory to good yields. The carboxylative Suzuki coupling reaction proceeded smooth-ly under mild conditions in the presence of palladium nanoparticles generated in situ through the formation of a π-benzylpalladium chloride intermediate.

关键词： Palladium nanoparticles Carboxylative Suzuki coupling Carbon dioxide Benzyl chlorides Allyl pinacolborate

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Kinetic simulation of an electronegative plasma with a cut-off distribution and modified Bohm criterion

引用

Plasma Science and Technology 2020年第4期22卷 33-39页

作者： suresh BASNET raju KHANAL Central Department of Physics Tribhuvan UniversityKirtipurKathmandu 44613Nepal

A kinetic simulation model has been employed to study the properties of an electronegative magnetized plasma sheath assuming the cut-off distribution of electrons and negative *** fundamental kinetic Bohm condition for the electronegative magnetized plasma has paramount importance for the formation of a stationary plasma sheath near the material *** presence of an oblique magnetic field in an electronegative plasma affects the ion distribution at the plasma injection side and at the *** temperature profile of negative charged particles has a non-uniform distribution,which determines the energy flow towards the wall.

关键词： Bohm condition kinetic simulation plasma–wall interaction electronegative plasma

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Assessment of Cross-coupling Effects in PV String-integrated-converters with P&O MPPT Algorithm Under Various Partial Shading Patterns

引用

CSEE Journal of Power and Energy Systems 2022年第4期8卷 1013-1028页

作者： Suneel raju Pendem suresh Mikkili the Electrical and Electronics Engineering Department National Institute of Technology GoaPonda 403401India

A signifcant challenge in the progress and development of Building-Integrated-Photovoltaic(B-I-PV)systems is concerned with the extraction of maximum power from PV *** PV system archtecture is an essential feature to extract the maximum *** conventional PV-centralinverter architecture consists of various connections among the PV modules,which are sensitive to shading effects and pro-duces mismatching power loss under partial shading conditions(PSCs),Hence,photovoltaic-distributed-maximum power point tracking(PV-D-MPPT)architecture has been proposed to extract the maximum ***-1 D-MPPT architecture,the output terminals of DC-DC converters are connected either in series or parallel *** main limitation of the series configuration in open-loop MPPT control is the crosscoupling *** of cross-coupling effects,the maximum-power-point(M-P-P)operation of shaded PV modules is lost under *** lost in M-P-P operation of shaded PV module also affects the unshaded modules M-P-P *** crosscoupling ffeets,the DC-DC converters are consuming the power instead of delivering to the *** the research activity,there are hardly any papers presenting a clear,comprehensive and mathematical analysis on the existence of cross-couplings in PV string-integrated-converters(S-1-Cs).This article presents a mathematical analysis and also explains the conditions for the existent of cross-coupling *** experimental results also validate with the mathematically analysed *** article also discusses the modeling of the two-diode model of PV module,design of boost type S-1C,and the Perturb and Observe(P&O)MPPT algorithm implementation.

关键词： Cross-coupling ffects mismatching power loss partial shading conditions(PSCs) PV-central-inverter architecture PV-D-MPPT architecture S-I-Cs series configuration

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Kinetic-theory-based investigation of electronegative plasma–wall transition with two populations of electrons

引用

Plasma Science and Technology 2021年第3期23卷 11-21页

作者： suresh BASNET Atit DEUJA raju KHANAL Central Department of Physics Tribhuvan UniversityKirtipurKathmandu 44613Nepal

Kinetic theory has been employed to investigate the magnetized plasma-sheath structure and its characteristics in the presence of more than one species of negatively charged particles:hot electrons,cold electrons,and negative *** cold electrons and negative ions are considered to obey a Maxwellian distribution,whereas the hot electrons follow a truncated Maxwellian *** Bohm sheath condition has been extended for the case of more than one species of negatively charged particles,in which the concentration of hot electrons has a crucial role in achieving the Bohm *** thermal motion of hot electrons is much higher compared to cold electrons and negative ions,such that the variation of hot electron concentrations and the temperature ratio of hot to cold electrons play a key role in the determination of the plasma-sheath parameters:particle densities,electrostatic potential,the flow of positive ions towards the wall,and sheath *** have estimated the deviation of the resultant drift velocity of positive ions on the plane perpendicular to the wall from the parallel component at the presheath–sheath *** is found that the deviation between the two velocity components increases with an increase in the obliqueness of the magnetic ***,the results obtained from the kinetic trajectory simulation model are compared with the results obtained using a fluid model;the results are qualitatively similar,although the potential varies by less than 4%in terms of the magnitude at the wall.

关键词： Bohm velocity fluid theory plasma sheath electronegative plasmas

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Studies on composite solid propellant with tri-modal ammonium perchlorate containing an ultrafine fraction

引用

Defence Technology（防务技术） 2017年第4期13卷 239-245页

作者： K.V. suresh Babu P. Kanaka raju C.R. Thomas A. Syed Hamed K.N. Ninan Solid Propellant Space Booster Plant Satish Dhawan Space Centre Sriharikota 524124 India Rocket Propellant Plant Vikram Sarabhai Space Centre Thiruvananthapuram 695 022 India Department of Chemistry Indian Institute of Space Science and Technology Thiruvananthapuram 695 547 India

Composite solid propellant is prepared using tri-modal Ammonium perchlorate(AP)containing coarse,fine and ultrafine fractions of AP with average particle size(APS)340,40 and 5 mm respectively,in various compositions and their rheological,mechanical and burn rate characteristics are *** optimum combination of AP coarse to fine to ultrafine weight fraction was obtained by testing of series of propellant samples by varying the AP fractions at fixed solid *** concentration of aluminium was maintained constant throughout the experiments for ballistics *** propellant formulation prepared using AP with coarse to fine to ultrafine ratio of 67:24:9 has lowest viscosity for the propellant paste and highest tensile strength due to dense packing as supported by the literature.A minimum modulus value was also observed at 9 wt.%of ultrafine AP concentration indicates the maximum solids packing density at this ratio of AP *** burn rate is evaluated at different pressures to obtain pressure *** of ultrafine fraction of AP in propellant increased burn rate without adversely affecting the pressure *** solid loading propellants are prepared by increased AP concentration from 67 to 71 wt.%using AP with coarse to fine to ultrafine ratio of67:24:*** solid content up to 89 wt.%was achieved and hence increased solid motor *** unloading viscosity showed a trend with increased AP content and the propellant couldn't able to cast beyond 71 wt.%of *** properties were also studied and from the experiments noticed that%elongation decreased with increased AP content from 67 to 71 wt.%,whereas tensile strength and modulus *** rate increased with increased AP content and observed that pressure exponent also increased and it is high for the propellant containing with 71 wt.%of AP due to increased oxidiser to fuel *** composite solid propellant is prepared by using burn rate modifie

关键词： Ammonium perchlorate Composite propellant Burn rate Copper chromite Iron oxide

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Spectral Analysis and Crystal Structure of Spiro[2.2”] Acenaphthene-1”-One-Spiro[3.3’]-5’-(2,3-Dichlorophenyl Methylidene)-1’-Methylpiperidin-4’-One-4- (2,3-Dichlorophenyl) Octahydroindolizine

引用

Crystal Structure Theory and Applications 2012年第3期1卷 74-78页

作者： Rakkappan Vishnu Priya Janakiraman suresh Sathiyamoorthi Sivakumar raju Ranjith kumar Department of Organic Chemistry School of Chemistry Madurai Kamaraj University Madurai India Department of Physics The Madura College (Autonomous) Madurai India

The crystal structure of spiro[2.2”]acenaphthene-1”-onespiro[3.3’]-5’-(2,3-dichlorophenylmethylidene)-1’-methylpipe-ridin-4’-one-4-(2,3-dichorophenyl) octahydroindolizine was elucidated by single crystal X ray diffraction. The title compound C37H30Cl4N2O2, crystallizes in the orthorhombic system, space group P212121 with a = 8.4610(4) , b = 16.0926(6) , c= 23.8997(11) and Z = 4. The central piperidine ring adopts twisted conformation, the piperidine of octahydroindolizine ring is in chair conformation and the pyrrole ring is in slightly twisted envelope conformation. Details of the synthesis, NMR, crystal structure determination and intra- and inter- molecular interactions of the compound are given.

关键词： Single Crystal Structure Conformation Hydrogen Bond NMR Spectra

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Occurrence of <i>Alternaria alternata</i>causing Alternaria blight in pigeonpea in India

引用

Advances in Bioscience and Biotechnology 2013年第6期4卷 702-705页

作者： Mamta Sharma raju Ghosh suresh Pande International Crops Research Institute for the Semi-Arid Tropics (ICRISAT) Patancheru India

Blight symptoms on pigeonpea were observed in alarming proportion since 2009 onwards in Andhra Pradesh state of India. Alternaria blight infected pigeonpea plants were collected from Andhra Pradesh state of India to isolate and characterize the pathogen. The isolate proved pathogenic on pigeonpea cultivar ICPL 87119. Genetic characteristics were analyzed based on the sequence of the rDNA-internal transcribed spacer (ITS) region. The phylogenetic tree based on rDNA-ITS analysis showed that the Alternaria alternata causing Alternaria blight in pigeonpea is very distinct from the other Alternaria isolate reported from different host. This is the first report of molecular identification of Alternaria alternata causing Alternaria blight in pigeonpea.

关键词： Climate Change Internal Transcribed Spacer (ITS) PCR Pigeonpea Phylogenetic Tree

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Benign neck masses showing restricted diffusion: Is there a histological basis for discordant behavior?

引用

World Journal of Radiology 2016年第2期8卷 174-182页

作者： Abanti Das Ashu S Bhalla raju Sharma Atin kumar Meher Sharma Shivanand Gamanagatti Alok Thakar suresh Sharma Department of Radiodiagnosis All India Institute of Medical Sciences Department of Pathology All India Institute of Medical Sciences Department of Otolaryn- gorhinology All India Institute of Medical Sciences

Diffusion weighted imaging(DWI) evolved as a complementary tool to morphologic imaging by offering additional functional information about lesions. Although the technique utilizes movement of water molecules to characterize biological tissues in terms of their cellularity, there are other factors related to the histological constitution of lesions which can have a significant bearing on DWI. Benign lesions with atypical histology including presence of lymphoid stroma, inherently increased cellularity or abundant extracellular collagen can impede movement of water molecules similar to malignant tissues and thereby, show restricted diffusion. Knowledge of these atypical entities while interpreting DWI in clinical practice can avoid potential misdiagnosis. This review aims to present an imaging spectrum of such benign neck masses which, owing to their distinct histology, can show discordant behavior on DWI.

关键词： Diffusion weighted imaging Benign neck masses Restricted diffusion

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：