检索结果-南通市图书馆

Electrochemical properties of titanium-based hydrogen storage alloy prepared by solid phase sintering

在线全文

学校读者我要写书评

暂无评论

Electrochemical properties of titanium-based hydrogen storag...

Two stage column leaching of uranium from uraninite ore

第九届全国氢能学术会议

作者： M.yang,y ding,l.Q.Ma,X.U.Zhao,X.X.Qu,y.J.Gao Nanjing University of Technology,China

The structure and electrochemical properties of titanium-based hydrogen storage alloy prepared by solid phase sintering at 1123K are *** result of X-ray diffraction (XRD) shows that the sintered alloy mainly consists of TiNi phase,involving part of TiNi and TiNi *** discharge capacity which can be up to a maximum value of 205 mAh/g

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Two stage column leaching of uranium from uraninite ore

Controlled cationic ring-opening polymerization of l-lactide by organic ion pair: novel approach to isotactic-rich and crystalline polylactide

中国核学会2011年学术年会

作者： D.X.ding,y.l.liu,G.y.li,N.Hu,y.D.Wang (Key Discipline laboratory for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China,Hengyang of Hunan Prov.421001,P.R.China)

The leaching process of uraninite ore was divided into the acidification and bacterial leaching stages,and the two stage leaching experiments and the control were conducted with 3 columns,each being charged with 20 kg uraninite *** ore contained 0.113%uranium,1.859%iron and large amounts of silica and *** the acidification stage,high to low concentration sulfuric acid solutions were used to acidify the uranium ore in each column until the pH of the pregnant leach solution from each column was maintained at *** acidification lasted for 18 d and the uranium recoveries for the three columns reached about 70%.In the bacterial leaching stage,column 1,as the control,continued to be leached with sulfuric acid solution with pH = 2.0,column 2,with the bacterial solution based on the indirect leaching mechanism,and column 3,with the bacterial solution based on the direct leaching *** leaching in this stage was continued until the concentrations of the uranium in the pregnant leach solutions from the three columns amounted to less than 50 mg/*** stage lasted for 20 d and the final uranium recoveries for columns 1,2 and 3 reached 73.72%,78.97%and 75.79%,respectively.

关键词： Acidification Bacterial leaching Acidithiobacillus ferrooxidans Ferric ions Uraninite ore

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Science China Chemistry 2025年第1期 394-402页

作者： Zhiqiang ding Mingqian Wang Zijing Zhou Bin Wang yuesheng li Tianjin Key laboratory of Composite & Functional Materials School of Materials Science and Engineering Tianjin University

living/controlled cationic ring-opening polymerization （ROP） of l-lactide is a promising approach to isotactic-rich and crystalline poly（l-lactide）.In contrast with the unsubstituted lactones,l-lA can not be polymerized by organic lewis acids or carbenium ions,and the state of the art in this field is the cationic ROP of l-lA catalyzed by Br?nsted acid/alcohol system via activated monomer ***,we reported the first example of controlled cationic ROP of l-lA by using Meerweintype ion pair[Me3O]+[B（C6F5）4]-as the catalyst.[Me3O]+[B（C6F5）4]-promoted rapid l-lA cationic polymerization in the absence of alcohol,producing isotactic-rich and crystalline PllA without transesterification and epimerization side *** activated chain end mechanism,involving twice SN2 substitution and configuration-inversion （S→R→S） with the assistance of released Me2O,was proposed and further verified by density functional theory and control *** work expands the catalytic toolbox of isotactic-rich and crystalline polylactide *** represents a unique example of cationic-controlled polymerization of l-lA catalyzed by an organic ion pair.

关键词：

同方期刊数据库

Deciphering the role of mtH2O2 in hepatic ischemia-reperfusion injury mechanisms with low-background super-resolution fluorogenic probe

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2025年第01期 297-307页

作者： Bin Fang limin Wang Haoqin li Jiaxin Zhang yang ding Pan Pan li Bo Peng Hua Bai lin li Frontiers Science Center for Flexible Electronics Xi'an Institute of Flexible Electronics (IFE) and Xi'an Institute of Biomedical Materials &Engineering Northwestern Polytechnical University Institute of Flexible Electronics (IFE Future Technologies) Xiamen University

Hepatic ischemia-reperfusion injury（HIRI） is characterized by mitochondrial dysfunction and oxidative stress. Monitoring mitochondrial hydrogen peroxide（mtH2O2） levels in real-time through super-resolution imaging is crucial for elucidating its distribution in live cells and its mechanism of action during HIRI. However, low-background fluorogenic probes have been overlooked in the context of super-resolution imaging. In this study, we developed a low-background fluorogenic probe（MitoWG） with the potential for super-resolution morphology-correlated mitochondrial identification to track the fluctuates of mtH2O2in HIRI. Activation of the desirable fluorescence properties of the probe by mtH2O2was confirmed using structural illumination microscopy（SIM）, enabling high-quality mitochondrial imaging with exceptional specificity and *** in mtH2O2levels were successfully observed in both cellular and rat models of HIRI. Furthermore, we associated the decline in mitochondrial redox homeostasis with accelerated mtH2O2production during HIRI, which triggered mitophagy deficiency and led to cell death. In conclusion, Mito-WG possesses excellent photophysical and low-background properties for SIM imaging, making it a promising tool for mtH2O2tracking in HIRI research and clinical diagnosis.

关键词：

同方期刊数据库

Simulation of Incompressible Viscous Flows by local DFD-Immersed Boundary Method

在线全文

学校读者我要写书评

暂无评论

Advances in Applied Mathematics and Mechanics 2012年第3期4卷 311-324页

作者： y.l.Wu C.Shu H.ding Department of Mechanical Engineering National University of Singapore10 Kent Ridge CrescentSingapore 117576 Department of Modern Mechanics University of Science and Technology of ChinaHefeiAnhui 230026China

A local domain-free discretization-immersed boundary method(DFDIBM)is presented in this paper to solve incompressible Navier-Stokes equations in the primitive variable *** the conventional immersed boundary method(IBM),the local DFD-IBM solves the governing equations in the whole domain including exterior and interior of the immersed *** effect of immersed boundary to the surrounding fluids is through the evaluation of velocity at interior and exterior dependent *** be specific,the velocity at interior dependent points is computed by approximate forms of solution and the velocity at exterior dependent points is set to the wall *** compared to the conventional IBM,the present approach accurately implements the non-slip boundary *** a result,there is no flow penetration,which is often appeared in the conventional IBM *** present approach is validated by its application to simulate incompressible viscous flows around a circular *** obtained numerical results agree very well with the data in the literature.

关键词： local domain free discretization(local DFD) immersed boundary method(IBM) incompressible flow flow past a circular cylinder

Novel heating-and deformation-induced phase transitions and mechanical properties for multicomponent Zr_(50)M_(50),Zr_(50)(M,Ag)_(50)and Zr_(50)(M,Pd)_(50)(M=Fe,Co,Ni,Cu)amorphous alloys

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

Journal of Materials Science & Technology 2022年第9期104卷 109-118页

作者： J.ding A.Inoue F.l.Kong S.l.Zhu y.l.Pu E.Shalaan A.A.Al-Ghamdi A.l.Greer School of Materials Science and Engineering Tianjin UniversityTianjin 300072China International Institute of Green Materials Josai International UniversityTogane 283-8555Japan Institute of Massive Amorphous Alloy Science China University of Mining TechnologyXuzhou 221116China Department of Physics King Abdulaziz UniversityJeddah 22254Saudi Arabia MISiS National University of Science and TechnologyMoscow 119049Russia School of Materials Science and Engineering Lanzhou Jiaotong UniversityLanzhou 730070China Department of Materials Science and Metallurgy University of CambridgeCambridge CB30FSUK

Multicomponent alloys of Zr_(50)M_(50),Zr_(50)(M,Ag)_(50)and Zr_(50)(M,Pd)_(50)(M=Fe,Co,Ni,Cu)can be melt-spun to obtain amorphous *** maximum thickness for fully amorphous ribbons varies with composition in the range 34-53μ*** contrast,fully amorphous ribbons are not obtainable for binary Zr_(50)Ni_(50)or ternary Zr_(50)(Ni,Cu)_(50)***-induced crystallization occurs through:two stages of amorphous[am]→[~(am')+B2]→[B2+B33]for Zr_(50)M_(50);and[am]→[am'+B2]→[B2+AgZr]for Zr_(50)(M,Ag)_(50);and a single stage of[am]→[B2]for Zr_(50)(M,Pd)_(50),while no B2 phase is formed for the binary and ternary Zr_(50)Q_(50)(Q=Ni or/and Cu)***-spun amorphous ribbons have good bending ***,Zr_(50)M_(50)ribbons in tension show 0.22-0.28%plastic elongation and work-hardening(the yield stress is~820 MPa,the fracture stress is~1200 MPa).When cold-rolled at room temperature to 30%reduction in thickness,Zr_(50)M_(50)ribbons show 10%increase in hardness,while retaining good bending ***-rolling induces precipitation of spheroidal B2 and irregular B33 particles,while deformation in tension induces B2,B33 and also plate-like monoclinic *** B2 and B33 particles form by polymorphic transformation,and include a high density of internal *** novel deformationinduced precipitation has not been recognized for any Zr_(50)Q_(50)binary or ternary *** new multicomponent systems are encouraging for future progress as structural amorphous alloys.

关键词： Multicomponent Microstructure Mechanical properties Phase transition Amorphous alloy

MICROSTRUCTURE AND PROPERTIES OF CuCr25 AllOyS WITH DIFFERENT Ni CONTENT

在线全文

学校读者我要写书评

暂无评论

Acta Metallurgica Sinica(English letters) 2003年第2期16卷 151-154页

作者： C.y.Zhang y.P.Wang Z.M.yang B.J.ding y.l.li SheyangNationallaboratoryforMaterialsScience InstituteofMetalResearchTheChineseAcademyofSciencesShenyang110016China SchoolofMaterialsScienceandEngineering Xi‘anJiaotongUniversityXi’an710049China liaoningElectronTubeCorporation Shenyang110023China

CuCr25 alloys containing different Ni content were prepared by vacuum induction melting (VIM). The micro structure and properties were tested. The results show that with the increase of Ni content in CuCr25 alloys, the Cr phase changed from developed dendrite into nodular grains and was drastically refined; the electrical conductivity significantly decrease, but still reach the level of conventional CuCr50 when the Ni content is below 0.5%. The Ni content had little influence on their breakdown strength. The first breakdown sites transferred to the boundary of Cu and Cr phase for CuCr25Ni compared to the Cr phase for CuCr25 without Ni.

关键词： CuCr25 contact material vacuum induction melting

Electrochemical studies of Meldola blue-modified bilayer lipid membranes

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 1997年第3期42卷 203-207页

作者： ding, l Wang, EK CHINESE ACAD SCI CHANGCHUN INST APPL CHEMELECTROANALYT CHEM LABCHANGCHUN 130022PEOPLES R CHINA

BIlAyER lipid membranes (BlM) have been extensively regarded as a basic structure that forms the matrix of biological membranes. The properties of BlM may be altered by incorporation and modification and can be employed to study many membrane processes. Especially biosensors and bi-molecular electronic devices made by BlM have a wide application. Many kinds of organic dyes are known as biological stains and often used in biology, physiology, pharmacology and medicine. In general, coloring and staining processes involve adsorp-

关键词： Meldola blue bilayer lipid membranes (BlM) electrochemistry.

Recognition Interactions of Metal-complexing Imprinted Polymer

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical letters 2005年第6期16卷 797-800页

作者： liu, y ding, GS De Wang, J Chinese Acad Sci Dalian Inst Chem Phys Dalian 116012 Peoples R China

Molecularly imprinted polymer, exhibiting considerable enantioselectivity for l-mandelic acid, was prepared using metal coordination-chelation interaction. By evaluating the recognition characteristics in the chromatographic mode, the recognition interactions were proposed: specific and nonspecific metal coordination-chelation interaction and hydrophobic interaction were responsible for substrate binding on metal-complexing imprinted polymer; while the selective recognition only came from specific metal coordination-chelation interaction and specific hydrophobic interaction.

关键词： Molecularly imprinted polymer metal coordination-chelation interaction recognition interaction enantioseparation.