检索结果-南通市图书馆

Integration of urchin-like MnCo_(2.O_(4)@C core–shell nanowire arrays within porous copper current collector for superior performance Li-ion battery anodes

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2024年第2期43卷 599-611页

作者： Xue-Ru zhang Qiong wu Yong zhang xi-Fei Li Ting xie Yu-Cheng wu Instrumental Analysis Center Hefei University of TechnologyHefei230009China Key Laboratory of Advanced Functional Materials and Devices of Anhui Province Hefei230009China school of Materials science and Engineering Hefei University of TechnologyHefei230009China Institute of Advanced Electrochemical Energy Xi’an University of TechnologyXi’an710048China

Spinel MnCo_(2.O_(4) is a promising energy storage candidate as anode materials in lithium-ion batteries owing to synergistic effects of two intrinsic solid-state redox ***,low conductivity,poor rate capacity and rapid capacity fading have seriously impaired its practical *** overcome the inferiorities,urchin-like MnCo_(2.O_(4)@C core–shell nanowire arrays have been fabricated directly within a porous copper current collector via a facile hydrothermal method followed by a chemical vapor deposition carbonization *** a typical nanowire,the core is composed of interconnected MnCo_(2.O_(4)nanoparticles and the shell shows as a thin amorphous carbon *** integrated MnCo_(2.O_(4)@C/Cu structure could act as working anodes without using additives or polymer *** MnCo_(2.O_(4)@C/Cu possesses slightly longer Li-ion insertion/desertion pathway than that of MnCo_(2.O_(4)/Cu,the carbon shell could effectively prevent the pulverization of MnCo_(2.O_(4) and lower down charge transfer resistance and actively participate in Li-ion *** rearrangement of carbon atoms during lithiation/delithiation cycling could inhibit the formation of passive solid electrolyte interphase *** a result,the MnCo_(2.O_(4)@C/Cu electrode presents superior rate capacity(600 mAh·g^(−1) at 1 A·g^(−1)) and better stability(797 mAh·g^(−1) after 2.0 cycles at 100 mA·g^(−1)).The excellent reversible Li ion storage capacity,cycling stability and rate capacity endow MnCo_(2.O_(4)@C/Cu great potential as stable and high output integrated anode materials in Li-ion batteries.

关键词： MnCo_(2.O_(4)@C Urchin-like nanowire arrays Core-shell Integrated anode materials Lithium-ion batteries

Spherical cationic polymer networks with porphyrin photosensitizer for sustainable and efficient photocatalysis

在线全文

学校读者我要写书评

暂无评论

Nano Research 2024年第5期17卷 3934-3941页

作者： Lingling zhang Liwei wu Junhui Bao Longhui Li Zejun Liu Feng Bai Jie Ju {2. Yao Key Laboratory for Special Functional Materials of Ministry of Education School of Materials Science and EngineeringHenan UniversityKaifeng 475004China Department of Chemistry City University of Hong KongKowloonHong Kong 999077China

The continuous and sustainable photo-activity on micro-or nano-carriers has always been a key stepping stone in the industrialization of photo-catalysis,photo-synthesis,and ***,we report a new series of positively charged hollow microspheres carrying porphyrin *** hollow spheres are formed through crosslinking of well-ordered porous thin laminates,initiated by co-assembly of regular monomers and those decorated with porphyrin *** the surface of an individual sphere,densely distributed positive sites attract anionic *** superficial porphyrin decomposes the accumulated reactants under 1 *** degradation and release of products,the photoactive sites are thereby *** demonstrate that polymer network(1:10)exhibited superior sustainable photocatalytic performance with complete degradation of methyl orange(MO)in 40 min with no observable performance deterioration after six *** established close loop of adsorption-reaction-release cycle makes possible many efficient and continuous photo-catalytic processes.

关键词： hydrogen bonding assembly porphyrin sustainable photo-activity anionic pollutant

Structural signature and contact force distributions in the simulated three-dimensional sphere packs subjected to uniaxial compression

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

science china(Physics,Mechanics & Astronomy) 2010年第5期53卷 892-904页

作者： LIU LianFeng1,2.zhang Lei1 & LIAO ShuFang1 1 Department of Mathematical sciences,{2.’an jiaotong-Liverpool University,Suzhou 2.512.,china 2.school of science,{2.’an jiaotong University,{2.’an 710049,china 1. Department of Mathematical sciences Xi’an Jiaotong-Liverpool University Suzhou 215123 China2. School of Science Xi’an Jiaotong University Xi’an 710049 China

Packing of spherical particles in a three-dimensional cylindrical container is simulated by using Discrete Element *** packed bed of spheres is also subjected to vertical compression which results in a dense *** of the packing during compaction are examined in detail in terms of the contact number,deviator fabric,and radial distribution ***,contact force distributions are measured at different locations in the pack,*** centre,the side wall,and the base(or bottom wall) of the *** simulations show that random close packing(RCP) tends to exist in the centre of the pack,while ordered packing structures exist near the container's *** uniaxial compression doesn't seem to alter the packing structure in the pack centre remarkably,but to reduce the structural anisotropy of the packing close to the container's *** simulated results have also helped to establish the correlations between packing structures and contact force ***,it is shown that small contact force distributions are sensitive to local packing *** simulated results are shown to be consistent with the recent experimental and simulation findings.

关键词： packing contact force distribution discrete element method particles boundary effect

Refractive index changes induced by sheet beams with various intensity distributions in LiNbO_(3):Fe crystal

在线全文

学校读者我要写书评

暂无评论

science china(Physics,Mechanics & Astronomy) 2005年第4期48卷 399-412页

作者： zhang Peng1, ZHAO Jianlin1, XU Honglai1, SUN Yidong2. YANG Dexing1 & WANG Meirong1 1. Institute of Optical Information {2. and Technology, school of {2., Northwestern Polytechnical University, xi’an 710072. china 2. school of {2., xi’an jiaotong University, xi’an 710049, china 1. Institute of Optical Information science and Technology School of Science Northwestern Polytechnical University 710072 Xi’an China 2. school of science Xi’an Jiaotong University 710049 Xi’an China

According to the Kukhtarev equations and a simplified model based on the photovoltaic charge carriers transport mechanism, the distributions of the index changes (DICs) in LiNbO3:Fe crystals induced by sheet beams with various intensity profiles are theoretically analyzed. The numerically simulated results coincide with the analytic expressions deduced from the simplified model. The DICs in a LiNbO3:Fe crystal induced by sheet beams with rectangular, Gaussian and square law profiles are measured by using the interferometric method. By employing the analytic expressions, the experimental data points are well fitted. By utilizing the angular spectrum theory and the ray equation, the uniformities of the intensity profiles of the writing beams along the propagation directions and the influences of the self-defocusing effect of the crystal are numerically simulated, respectively. The results show that the experimental results are reliable. The numerically simulated method and the analytic expressions can be both employed to predict the DICs induced by sheet beams with various light intensity profiles. Furthermore, utilizing writing beams with proper intensity profiles, any desired index distributions could be obtained.

关键词： LiNbO3:Fe crystal, light intensity profile, distribution of refractive index changes, sheet beam.

Engineering Shewanella-re duce d graphene oxide aerogel biohybrid to efficiently synthesize Au nanoparticles

在线全文

学校读者我要写书评

暂无评论

Journal of Materials science & Technology 2024年第1期168卷 50-61页

作者： Baocai zhang Shulin Shao Huan Yu Qijing Liu Sicheng Shi Qingyuan wu Zijie wu Yiyu Feng Yifei Wang xi Sun Deguang wu Feng Li Hao Song Frontier science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering(Ministry of Education) Tianjin UniversityTianjin 300072China Collaborative Innovation Center of Chemical science and Engineering(Tianjin) School of Chemical Engineering and TechnologyTianjin UniversityTianjin 300072China Beijing Advanced Innovation Center for Soft Matter science and Engineering Beijing University of Chemical TechnologyBeijing 100029China school of Materials science and Engineering Tianjin UniversityTianjin 300350China College of Biological Engineering Tianjin Agricultural UniversityTianjin 300384China Department of Brewing Engineering Moutai InstituteLuban AveRenhuai 564507China

Biosynthesizing Au nanoparticles(AuNPs)from gold-bearing scraps provides a sustainable method to meet the urgent demand for ***,it remains challenging to efficiently biosynthesize AuNPs of which the diameter is less than 10 nm from a trace amount of Au^(3+)concentration at the level of tens ***,we constructed an exoelectrogenic cell(eCell)-conductive reduced-graphene-oxide aero-gel(rGA)biohybrid by assembling Shewanella sp.S1(SS1)as living biocatalyst and rGA as conductive ad-sorbent,in which Au^(3+)at trace concentrations would be enriched by the adsorption of rGA and reduced to AuNPs through the extracellular electron transfer(EET)of *** regulate the size of the synthe-sized AuNPs to 10 nm,the strain SS1 was engineered to enhance its EET,resulting in strain RS2.pYYD-P tac-ribADEHC&pHG13-P_(bad)-omcC in SS1).Strain RS2.was further assembled with rGA to construct the RS2.rGA biohybrid,which could synthesize AuNPs with the size of 7.62.2.82.nm from 60 ppm Au^(3+)*** eCell-rGA biohybrid integrated Au^(3+)adsorption and reduction,which enabled AuNPs biosyn-thesis from a trace amount of Au^(3+).Thus,the required Au^(3+)ions concentration was reduced by one or two orders of magnitude compared with conventional methods of AuNPs *** work devel-oped an AuNPs size regulation technology via engineering eCell’s EET with synthetic biology methods,providing a feasible approach to synthesize AuNPs with controllable size from trace level of gold ions.

关键词： Au nanoparticles Exoelectrogenic cell(e-Cell) Shewanella Synthesis biology Extracellular electron transfer Reduced graphene oxide aerogel

Novel strengthening methods for ultralightweight sandwich structures with periodic lattice cores

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

science china(Technological sciences) 2010年第3期53卷 875-877页

作者： LU TianJian 1 &zhang QianCheng 2.1 MOE Key Laboratory for Strength and Vibration,school of Aerospace,{2.’an jiaotong University,{2.’an 710049,china 2.State Key Laboratory for Mechanical Behavior of Materials,school of Material science and Engineering,{2.’an jiaotong University,{2.’an 710049,china 1. MOE Key Laboratory for Strength and Vibration School of Aerospace Xi’an Jiaotong University Xi’an 710049 China2. State Key Laboratory for Mechanical Behavior of Materials School of Material Science and Engineering Xi’an Jiaotong University Xi’an 710049 China

Recent development of ultralightweight lattice-cored sandwiches is reviewed,with focus placed on various novel fabrication methods introduced to strengthen these structures,covering not only research results published... 详细信息

关键词： cellular metals strengthening method fabrication sandwich panels

Rare variants in FANCJ induce premature ovarian insufficiency in humans and mice

在线全文

学校读者我要写书评

暂无评论

Journal of Genetics and Genomics 2024年第2期51卷 252-255页

作者： xi Yang Shuting Ren Jialin Yang Yuncheng Pan Zixue Zhou Qing Chen Yunzheng Fang Lingyue Shang Feng zhang xiaojin zhang Yanhua wu State Key Laboratory of Genetic Engineering at school of Life sciences Human Phenome InstituteObstetrics and Gynecology HospitalFudan UniversityShanghai 200438China Obstetrics and Gynecology Hospital Institute of Reproduction and DevelopmentState Key Laboratory of Genetic Engineering at School of Life SciencesFudan UniversityShanghai 200011China Human Phenome Institute Zhangjiang Fudan International Innovation CenterFudan UniversityShanghai 201203China Obstetrics and Gynecology Hospital Institute of Reproduction and DevelopmentFudan UniversityShanghai 200011China State Key Laboratory of Genetic Engineering at school of Life sciences Obstetrics and Gynecology HospitalFudan UniversityShanghai 200438China National Demonstration Center for Experimental Biology Education School of Life SciencesFudan UniversityShanghai 200433China

Premature ovarian insufficiency(POI)is a severe female reproductive disorder that affects 1%of women in general populations(European Society for Human Reproduction and Embryology[ESHRE]Guideline Group on POI et al.,2.16).An increasing prevalence up to 3.7%has been reported in a recent meta-analysis(Golezar et al.,2.19).POl can lead to infertility or subfertility,as well as a range of complex complications suffering multi-organ systems,seriously threatening women's health and reducing the life *** contrast,POl is a representative heterogeneous disease with multiple *** more than 70 causative POI genes have been identified,the etiology of more than half of the POI patients is still ambiguous(Jiao et al.,2.18).Unreported POI causative genes,therefore,remain to be identified.

关键词： insufficiency fertility

Regulation of specific abnormal calcium signals in the hippocampal CA1 and primary cortex M1 alleviates the progression of temporal lobe epilepsy

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

Neural Regeneration Research 2024年第2期19卷 425-433页

作者： Feng Chen xi Dong Zhenhuan Wang Tongrui wu Liangpeng Wei Yuanyuan Li Kai {2. Zengguang Ma Chao Tian Jing Li Jingyu Zhao Wei {2. Aili Liu Hui Shen Laboratory of Neurobiology School of Biomedical EngineeringTianjin Medical UniversityTianjinChina Institute for Translational Neuroscience the Second Affiliated Hospital of Nantong UniversityNantongJiangsu ProvinceChina Institute for Translational Brain Research Fudan UniversityShanghaiChina Department of Radiology the Affiliated Drum Tower Hospital of Nanjing University Medical SchoolNanjingJiangsu ProvinceChina Innovative Institute of Chinese Medicine and Pharmacy Shandong University of Traditional Chinese MedicineJinanChina Department of Anesthesiology Tianjin Medical University General HospitalTianjinChina Department of Orthopaedics Tianjin Medical University General HospitalTianjinChina Tianjin Eye Hospital Tianjin Eye InstituteTianjin Key Lab of Ophthalmology and Visual ScienceTianjinChina Laboratory of Neurobiology School of Basic Medical SciencesTianjin Medical UniversityTianjinChina

Temporal lobe epilepsy is a multifactorial neurological dysfunction syndrome that is refractory,resistant to antiepileptic drugs,and has a high recurrence *** pathogenesis of temporal lobe epilepsy is complex and is not fully *** calcium dynamics have been implicated in temporal lobe ***,the effect of fluctuating calcium activity in CA1 pyramidal neurons on temporal lobe epilepsy is unknown,and no longitudinal studies have investigated calcium activity in pyramidal neurons in the hippocampal CA1 and primary motor cortex M1 of freely moving *** this study,we used a multichannel fiber photometry system to continuously record calcium signals in CA1 and M1 during the temporal lobe epilepsy *** found that calcium signals varied according to the grade of temporal lobe epilepsy *** particular,cortical spreading depression,which has recently been frequently used to represent the continuously and substantially increased calcium signals,was found to correspond to complex and severe behavioral characteristics of temporal lobe epilepsy ranging from gradeⅡto gradeⅤ.However,vigorous calcium oscillations and highly synchronized calcium signals in CA1 and M1 were strongly related to convulsive motor *** inhibition of pyramidal neurons in CA1 significantly attenuated the amplitudes of the calcium signals corresponding to gradeⅠ*** addition,the latency of cortical spreading depression was prolonged,and the above-mentioned abnormal calcium signals in CA1 and M1 were also significantly ***,it was possible to rescue the altered intracellular calcium *** simultaneous analysis of calcium signals and epileptic behaviors,we found that the progression of temporal lobe epilepsy was alleviated when specific calcium signals were reduced,and that the end-point behaviors of temporal lobe epilepsy were *** results indicate that the calcium dynamic between CA1 and M1 may reflect sp

关键词： Ca^(2.) calcium signals chemogenetic methods hippocampus primary motor cortex pyramidal neurons temporal lobe epilepsy

Large eddy simulation of flow in a street canyon with tree planting under various atmospheric instability conditions

在线全文

学校读者我要写书评

暂无评论

science china(Technological sciences) 2010年第7期53卷 1928-1937页

作者： GU ZhaoLin1, zhang YunWei2.& LEI KangBin3 1 {2. of Human Settlements and Civil Engineering, xi’an jiaotong University, xi’an 710049, china 1 {2. of Energy and Power Engineering, xi’an jiaotong University, xi’an 710049, china 3 RIKEN Institute, Wako, Saitama, 351-0198, Japan 1. school of Human Settlements and Civil Engineering Xi’an Jiaotong University Xi’an 710049 China2. School of Energy and Power Engineering Xi’an Jiaotong University Xi’an 710049 China3. RIKEN Institute Wako Saitama 351-0198 Japan

In this work, a large eddy simulation (LES) model, which includes momentum and heat source (or sink) inside the tree planting layer, is proposed for the simulation of flow in a street canyon with tree planting. Vegetation canopy layer simulation shows that this model can be used to simulate the velocity distribution and temperature variation inside the canopy layer. Effects of atmospheric instability on flow and pollutant distribution in a street canyon with tree planting of an aspect ratio of 0.5 are studied. Results show that compared with the canyon with no tree planting (or the exposed street canyon), the canyon with tree planting shows a reduced wind circulation and pollutant exchange rate (PER) at the top layer of the street canyon, which induces the increase in the pollutant concentrations near road surface, leeward wall and windward wall. When street canyon atmosphere is under a strongly unstable condition, wind velocity decreases while pollutant concentration is increased in the areas near the street canyon top, road surface, leeward and windward walls, compared with the wind velocity in the street canyon with the neutral stratification. When street canyon atmosphere is under a weakly unstable condition, wind velocity weakens near the street canyon top and windward wall, but strengthens near the road surface and leeward wall, and pollutant concentration is decreased near the leeward and windward walls and is increased between the two rows of trees. When the street canyon atmosphere is under an unstable condition, PER is lower than that under the neutral stratification.

关键词： street canyon flow tree planting atmospheric instability large eddy simulation pollutant concentration distribution