检索结果-南通市图书馆

A rational preparation strategy of phase tuned moO_(3) nanostructures for high-performance all-solid asymmetric supercapacitor

引用

Journal of Energy Chemistry 2023年第12期87卷 192-206,I0006页

作者： m.Kundu D.mondal I.mondal A.Baral P.Halder S.Biswas B.K.Paul N.Bose R.Basu S.das Department of Physics Jadavpur UniversityKolkata 700032India Department of Physics Jogamaya Devi CollegeKolkata 700026India Rescon India Pvt.Ltd Kolkata 700034India School of Advanced materials Green Energy and Sensor Systems(SAMGESS)IIESTShibpurHowrah 711103India Bangabasi College Kolkata 700009India University of Engineering and management Kolkata 700160India

In this work,phase and morphology-tuned moO_(3) nanostructures are synthesized through a novel modified co-precipitation method,and their electrochemical properties are *** the first time,such a simple surfactant-assisted synthesis process aided by minor temperature variations is reported which results in phase transition of the nanoparticles from h-moO_(3) nano-rods to a-moO_(3) *** nanostructures thus developed are highly porous and crystalline with significantly large specific surface area as compared to previous *** theoretical bandgap energy of the optimized sample calculated using Perdew-Zunger local density approximation(LDA) is in good agreement with the experimental *** overall structural,morphological,and surface-behavioural analysis predicts the electrochemical superiority in 2D a-moO_(3).The cyclic voltammetry and galvano-potentiometry measurements of 2D a-moO_(3) in the potential window of-0.6 V to +0.2 V present the highest pseudosupercapacitive response with a maximum specific capacitance of 829 F g^(-1)at 2 A g^(-1)as compared to h-moO_(3) (452 F g^(-1)) and h@a-moO_(3) (783 F g^(-1)).Thus,the moO_(3) 2D nanostructures synthesized through our novel synthesis technique display excellent specific capacitance as compared to previous reported ***,a-moO_(3) exhibits a galvanostatic charging-discharging cyclic stability of about 91%after 2000 cycles,indicating that it can serve as an excellent electrode material for supercapacitors.A solid-state asymmetric supercapacitor device is successfully constructed using a-moO_(3) which can light up 4 red LEDs for 10 *** specific energy density of the device reaches a maximum value of 36.3 W h kg^(-1)at the power density of 50 W kg^(-1).

关键词： moO_(3)nanoparticles Asymmetric solid-state supercapacitor Electrochemical performance Low-temperature novel synthesis technique Density functional calculations

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

Immunological roulette: Luck or something more? Considering the connections between host and environment in TB

引用

Cellular & molecular Immunology 2018年第3期15卷 226-232页

作者： John E Pearl mrinal das Andrea m Cooper Department of Infection Immunity and Inflammation Leicester Tuberculosis Research Group(LTBRG)University of LeicesterUniversity RoadLeicesterLE17RHUK

Accurate prediction of which patient will progress from a sub-clinical mycobacterium tuberculosis infection to active tuberculosis represents an elusive,yet critical,clinical research *** the individual perspective,progression can be considered to be the product of a series of unfortunate events or even a run of bad ***,we identify the subtle physiological relationships that can influence the odds of progression to active TB and how this progression may reflect directed dysbiosis in a number of interrelated *** infected individuals who progress to disease have apparently good immune responses,but these responses are,at times,compromised by either local or systemic environmental *** disease promoting processes,such as tissue-damaging granulomata,usually manifest in the lung,but illness is *** apparent dichotomy between local and systemic reflects a clear need to define the factors that promote progression to active disease within the context of the body as a physiological *** discuss aspects of the host environment that can impact expression of immunity,including the microbiome,glucocorticoid-mediated regulation,catecholamines and interaction between the gut,liver and *** suggest the importance of integrating precision medicine into our analyses of experimental outcomes such that apparently conflicting results are not contentious,but rather reflect the impact of these subtle relationships with our environment and microbiota.

关键词： gut-liver-lung axis microbiome tuberculosis

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 regulation of mXene with water-in-LiCl electrolyte for high-voltage micro-supercapacitors

引用

National Science Review 2022年第7期9卷 97-105页

作者： Yuanyuan Zhu Shuanghao Zheng Pengfei Lu Jiaxin ma Pratteek das Feng Su Hui-ming Cheng Zhong-Shuai Wu State Key Laboratory of Catalysis Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian National Laboratory for Clean Energy Chinese Academy of Sciences University of Chinese Academy of Sciences Shenyang National Laboratory for materials Science Institute of Metal Research Chinese Academy of Sciences Faculty of materials Science and Engineering/Institute of Technology for Carbon Neutrality Shenzhen Institute of Advanced TechnologyChinese Academy of Sciences Shenzhen International Graduate School Tsinghua University

mXenes are one of the key materials for micro-super capacitors(mSCs),integrating miniaturized energy-storage components with ***,the energy densities of mSCs are greatly hampered by mXenes’ narrow working potential window(typically≤0.6 V) in aqueous ele ***,we report the fabrication of high-voltage mXene-mSCs through the efficient regulation of reaction kinetics in 2 D Ti3C2TxmXene microelectrodes using a water-in-LiCl(WIL,20 m LiCl) salt gel ***,the intrinsic energy-storage mechanism of mXene microelectrodes in WIL,which is totally different from traditional electrolytes(1 m LiCl),was revealed through in situ and ex situ *** validated that the suppression of mXene oxidation at high anodic potential occurred due to the high content of WIL regulating anion intercalation in mXene electrodes,which effectively broadened the voltage window of ***,the symmetric planar mXene-mSCs presented a record operating voltage of 1.6 V,resulting in an exceptionally high volumetric energy density of 31.7 mWh *** the ultra-high ionic conductivity(69.5 mS cm-1) and ultralow freezing point(-57℃) of the WIL gel electrolyte, our mSCs could be operated in a wide temperature range of-40 to 60℃,and worked for a long duration even at-40℃,demonstrative of its practicality in extreme environments.

关键词： mXene micro-supercapacitors water-in-LiCl aqueous high voltage wide temperature

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Interacting system NGC 7805/6(Arp 112)and its tidal dwarf galaxy candidate

引用

Research in Astronomy and Astrophysics 2021年第2期21卷 149-156页

作者： Zhen-Xing Fu chandreyee Sengupta Ramya Sethuram Bikram Pradhan mridweeka Singh Kuntal misra TomCScott Yin-Zhe ma Purple mountain Observatory(CAS) Nanjing 210034China School of Astronomy and Space Sciences University of Science and Technology of ChinaHefei 230026China Indian Institute of Astrophysics KoramangalaBangalore 560034India Aryabhatta Research Institute of Observational Sciences Manora PeakNainital 263001India Korea Astronomy and Space Science Institute 776 Daedeokdae-roYuseong-guDaejeon 34055Republic of Korea Institute of Astrophysics and Space Sciences(IA) Rua das Estrelas4150-762 PortoPortugal School of Chemistry and Physics University of KwaZulu-NatalWestville CampusPrivate Bag X54001Durban4000South Africa NAOC-UKZN Computational Astrophysics Centre(NUCAC) University of KwaZulu-NatalDurban4000South Africa

We present results from our Giant metrewave Radio Telescope(GmRT)HⅠ,Himalayan Chandra Telescope(HCT)Hα,1 m Sampurnanand Telescope(ST)and 1.3 m Devasthal Fast Optical Telescope(DFOT)deep optical observations of the NGC 7805/6(Arp 112)system to test KUG 2359+311’s tidal dwarf galaxy(TDG)candidacy and explore the properties of the interacting *** GmRT HⅠmap shows no HⅠdetection associated with KUG 2359+311,nor any HⅠtail or bridge-like structure connecting KUG 2359+311 to the NGC 7805/6 *** HCT Hαimage,on the other hand,displays strong detections in KUG 2359+311,with net SFR0.035±0.009 m_(⊙)yr^(-1).The Hαdata constrain the redshift of KUG 2359+311 to 0.00≤z≤0.043,compared to the redshift of NGC 7806 *** detected to date have all been HⅠrich,and displayed HⅠ,ionised gas and stellar tidal debris trails(bridges or tails)linking them to their parent ***,neither our HⅠdata nor our optical imaging,while three magnitudes deeper than SDSS,reveals a tidal trail connecting KUG 2359+311 to NGC 7805/*** of HⅠ,presence of an old stellar population,ongoing star formation and reasonably high SFR compared to normal dwarf galaxies suggest that KUG 2359+311 may not be an Arp 112 *** is most likely a case of a regular gas-rich dwarf galaxy undergoing a morphological transformation after having lost its entire gas content to an interaction with the Arp 112 *** and metallicity from future spectroscopic observations of KUG 2359+311 would help clarify the nature of this enigmatic structure.

关键词： galaxies dwarf-galaxies interactions-galaxies spiral-galaxies star formation-galaxies peculiar-radio lines galaxies

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

Electrochemically functionalized graphene as an anti-corrosion reinforcement in Cu matrix composite thin films

引用

International Journal of minerals,metallurgy and materials 2021年第9期28卷 1525-1533页

作者： Akhya kumar Behera Amlan das Sanjeev das Archana mallik Electrometallurgy and Corrosion Laboratory(Research) Department of Metallurgical and Materials EngineeringNational Institute of TechnologyRourkela 769008OdishaIndia Advanced metal Casting Laboratory Department of Metallurgical and Materials EngineeringNational Institute of TechnologyRaipur 492010ChhatisgarhIndia

Cu-graphene(Gr)composite thin films were prepared by electrodeposition route using in-house synthesized Gr *** Gr sheets were synthesized by the electrochemical exfoliation route using 1 m HClO4 acid as *** Gr sheets were confirmed by X-ray diffraction(XRD),Fourier transform infrared spectroscopy(FTIR),field-emission scanning electron microscopy(FESEm),and transmission electron microscopy(TEm).The(002)plane of Gr sheets was observed at 2θof 25.66°.The(002)plane confirmed the crystal structure of car-bon *** stretching vibration of C=C bond at a wavelength of 1577 cm^(−1) and other functional groups of carboxyl and epoxide groups were observed from *** confirmed the transparent structure of Gr *** prepared Gr sheets were used as reinforcement at con-centrations of 0.1 and 0.3 g/L with a copper matrix to synthesize the Cu-Gr *** prepared composite thin films were characterized by XRD,SEm,and energy-dispersion spectrometry(EDS)for morphological and analytical *** presence of Gr sheets in Cu-Gr com-posite was confirmed by EDS *** prepared Cu-Gr nanocomposite thin film showed higher corrosion resistance compared with pure copper thin films in 3.5wt%NaCl,as confirmed by Tafel *** impedance spectroscopy complimented the above results and showed that 0.3 g/L composite film achieved the highest film resistance.

关键词： graphene nanocomposite electrodeposition copper

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

Transcriptome changes in seeds during coleorhiza hair formation in rice

引用

The Crop Journal 2022年第3期10卷 692-703页

作者： Tao Song ANmRubaiyath Bin Rahman Debatosh das Neng-Hui Ye Feng Yang Fu-Yuan Zhu mo-Xian Chen Jian-Hua Zhang Co-Innovation Center for Sustainable Forestry in Southern China College of Biology and the EnvironmentNanjing Forestry UniversityNanjing 210037JiangsuChina Shenzhen Research Institute The Chinese University of Hong Kon6Shenzhen 518057Guangdon6China Southern Regional Collaborative Innovation Center for Grain and Oil Crops in China College of AgricultureHunan Agricultural UniversityChangsha 410128HunanChina Department of Biology Hong Kong Baptist UniversityKowloon 999077Hong Kon6China CAS Key Laboratory of Quantitative Engineering Biology Shenzhen Institute of Synthetic BiologyShenzhen Institutes of Advanced TechnologyChinese Academy of SciencesShenzhen 518055Guangdon6China School of Life Sciences and State Key Laboratory of Agrobiotechnology The Chinese University of Hong Kon6Shatin 999077Hong Kon6China

Coleorhiza hairs are hairlike structures in seeds of the grass family(Poaceae).The molecular mechanisms underlying its formation are largely unknown,study on this topic will expand our understanding of the effects of water status on germination during rice(Oryza sativa L.)direct *** of Nipponbare were treated under two water conditions:in one,half of the seed surface was immersed in water and the other half was embryo side in air(EIA),and in the other,the whole seed was covered by water(CBW).Coleorhiza hairs formed only in EIA *** was used to identify the gene regulation during coleorhiza hair formation in EIA(***)embryos and *** displayed more transcriptome modulation even though smaller in size than the *** expressed genes(DEGs)were enriched in both primary and secondary metabolism and showed changes in abscisic acid,auxin,jasmonic acid,and salicylic acid *** enrichment data were positively correlated with gene expression changes in the affected metabolic functional *** presence of shorter coleorhiza hairs in an Os RHL1(Os06 g0184000,a coleorhiza hair formation regulation candidate gene)knockout mutant suggested that root hair-associated DEGs share molecular regulators that control the formation of coleorhiza hairs.

关键词： Embryo Endosperm Transcriptomics metabolomics Hormone Coleorhiza hair

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

Electron-phonon coupling and spin fluctuations in the Ising superconductor NbSe_(2)

引用

npj Computational materials 2023年第1期9卷 1686-1694页

作者： S.das H.Paudyal E.R.margine D.F.Agterberg I.I.mazin Department of Physics and Astronomy George Mason UniversityFairfaxVA 22030USA Quantum Science and Engineering Center George Mason UniversityFairfaxVA 22030USA Department of Physics Applied Physicsand AstronomyBinghamton University-SUNYBinghamtonNY 13902USA Department of Physics University of WisconsinMilwaukeeWI 53201USA

Ising superconductivity,observed in NbSe2 and similar materials,has generated tremendous ***,attention was called to the possible role that spin fluctuations(SF)play in this phenomenon,in addition to the dominant electron–phonon coupling(EPC);the possibility of a predominantly triplet state was discussed and led to a conjecture of viable singlet–triplet Leggett ***,these hypotheses have not been put to a quantitative *** this paper,we report first principle calculations of the EPC and also estimate coupling with SF,including full momentum *** find that:(1)EPC is strongly anisotropic,largely coming from the K-K0 scattering,and therefore excludes triplet symmetry even as an excited state;(2)superconductivity is substantially weakened by SF,but anisotropy remains as above;and,(3)we do find the possibility of a Leggett mode,not in a singlet–triplet but in an s_(++)–s_(±)channel.

关键词： coupling phonon superconductivity

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

Circulation characteristics of horseshoe vortex in scour region around circular piers

引用

Water Science and Engineering 2013年第1期6卷 59-77页

作者： Subhasish das Rajib das Asis mAZUmDAR School of Water Resources Engineering Jadavpur University

This paper presents an experimental investigation of the circulation of the horseshoe vortex system within the equilibrium scour hole at a circular pier, with the data measured by an acoustic Doppler velocimeter （ADV）. Velocity vector plots and vorticity contours of the flow field on the upstream plane of symmetry （y = 0 cm） and on the planes ：e3 cm away from the plane of symmetry Cv = ~3 cm） are presented. The vorticity and circulation of the horseshoe vortices were determined using the forward difference technique and Stokes theorem, respectively. The results show that the magnitudes of circulations are similar on the planes y = 3 cm and y = -3 cm, which are less than those on the plane y = 0 cm. The circulation decreases with the increase of flow shallowness, and increases with the densimetric Froude number. It also increases with the pier Reynolds number at a constant densimetric Froude number, or at a constant flow shallowness. The relative vortex strength （dimensionless circulation） decreases with the increase of the pier Reynolds number. Some empirical equations are proposed based on the results. The predicted circulation values with these equations match the measured data, which indicates that these equations can be used to estimate the circulation in future studies.

关键词： experimental investigation," open channel turbulent flow," scour," horseshoe vortex,"circulation," circular pier forward difference technique," Stokes theorem

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

Diversity and structural composition of species in dipterocarp forests:a study from Fasiakhali Wildlife Sanctuary, Bangladesh

引用

Journal of Forestry Research 2018年第5期29卷 1241-1249页

作者： S.C.das m.S.Alam m.A.Hossain Institute of Forestry and Environmental Sciences University of Chittagong

Fasiakhali Wildlife Sanctuary is a protected area composed of tropical remnant rainforest that harbor substantial number of large,old Garjan（Dipterocarpus spp.）*** present study assessed composition,structure and diversity of the species in this protected area.A total of 32 trees species were recorded with DBH ≥ 11 cm belonging to 24 genera and 19 *** forest is low in plant diversity as represented by Shannon–Wiener diversity and Simpson Dominance *** turbinatus was the most dominant species with maximum relative density,frequency,dominance,and importance value *** firmum and Tectona grandis followed in terms of *** structural composition indicated higher number of individuals in the medium growth classes（41 to 〈 511 cm DBH and 16–20 m height ranges）,whereas *** was the only species that dominated most of the growth *** stem density in lower growth classes indicated meager recruitment of regeneration which may be due to lower annual precipitation,increased grazing and *** study will help to understand the patterns of tree species composition and diversity in the remnant dipterocarp forests of *** will also contribute to identifying threatened plants to undertake *** based conservation and sustainable management of the Fasiakhali Wildlife Sanctuary.

关键词： Species diversity Structural composition Protected area Importance value index Cluster analysis

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

Effect of size on momentum distribution of electrons around vacancies in NiO nanoparticles

引用

Chinese Physics B 2015年第4期24卷 296-299页

作者： Anjan das Atis Chandra mandal P.m.G.Nambissan Department of Physics A.P.C.Roy Government College Department of Physics University of Burdwan Applied Nuclear Physics Division Saha Institute of Nuclear Physics

Very small nickel oxide nanoparticles were prepared by a sol-gel procedure using nickel nitrate hexahydrate and ammonium hydroxide as precursors. The particles are in the range of 5 nm-11 rim. The x-ray diffraction （XRD） crystallography and high resolution transmission electron microscopy （HRTEm） were employed to characterize the samples. They were found to be polycrystalline in nature and fcc （NaCl-type） in structure, with the lattice parameter varying with annealing temperature. HRTEm pictures show that the as-prepared samples are hexagonal in shape. Positron annihilation spectroscopy was used to investigate the Doppler-broadened spectra of the samples. The S and W parameters revealed that the chemical surroundings and momentum distribution of the vacancy clusters vary with crystallite size.

关键词： nanoparticles semiconductor defect cluster positron annihilation sol-gel

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

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：