检索结果-南通市图书馆

Low-temperature chlorination roasting technology for the simultaneous recovery of valuable metals from spent LiCoO_(2)cathode material

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

International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 80-91页

作者： Junjie shi Changle Hou Jingjing dong dong Chen Jianzhong Li Key Laboratory for Ecological Metallurgy of Multimetallic Mineral(Ministry of Education) Northeastern UniversityShenyang 110819China School of Metallurgy Northeastern UniversityShenyang 110819China

With the continuous increase in the disposal volume of spent lithium-ion batteries(LIBs),properly recycling spent LIBs has become essential for the advancement of the circular *** study presents a systematic analysis of the chlorination roasting kinetics and proposes a new two-step chlorination roasting process that integrates thermodynamics for the recycling of LIB cathode *** activation energy for the chloride reaction was 88.41 kJ/mol according to thermogravimetric analysis–derivative thermogravimetry data obtained by using model-free,model-fitting,and Z(α)function(αis conversion rate).Results indicated that the reaction was dominated by the first-order(F1)model when the conversion rate was less than or equal to 0.5 and shifted to the second-order(F2)model when the conversion rate exceeded *** conditions were determined by thoroughly investigating the effects of roasting temperature,roasting time,and the mass ratio of NH_(4)Cl to LiCoO_(2).Under the optimal conditions,namely 400℃,20 min,and NH_(4)Cl/LiCoO_(2)mass ratio of 3:1,the leaching efficiency of Li and Co reached 99.43% and 99.05%,*** of the roasted products revealed that valuable metals in LiCoO_(2)transformed into CoCl_(2) and ***,the reaction mechanism was elucidated,providing insights for the establishment of a novel low-temperature chlorination roasting technology based on a crystal structure *** technology can guide the development of LIB recycling processes with low energy consumption,low secondary pollution,high recovery efficiency,and high added value.

关键词： spent lithium-ion battery thermodynamics chlorination roasting kinetics circular economy

Effect of Hypoxia on Ca^(2+) Concentration in Broiler's Cardiac Muscle Cells

在线全文

学校读者我要写书评

暂无评论

Agricultural Sciences in China 2007年第9期6卷 1133-1137页

作者： dong shi-shan WANG Ying-chun MALi-qin LI Kai ZHANG Jian-jun OU De-yuan ZHAO Li-hong LIU Ju-xiang QIAO Jian College of Animal Science and Technology Agricultural University ofHebei Baoding 071001 P.R.China College of Veterinary Medicine China Agricultural University Beijing 100094 P.R.China College of Animal Science and Technology Hebei North University Zhangjiakou 075001 P.R.China

The purpose of this research was to study the effect of hypoxia on the Ca^2＋ concentration in broiler＇s cardiac muscle cells （CMCs）. The concentration of Ca^2＋ in the CMC was observed using a laser scanning confocal microscope （LSCM）. The results showed that hypoxia could significantly increase intracellular Ca^2＋（normal oxygen, 99.3 ＋_ 13.1; hypoxia, 129.4 ＋_ 24.3, P 〈 0.01） in CMCs. The Ca^2＋ antagonist （nifedipine, verapamil） could significantly restrain the Ca^2＋ influx across the cell membrane of CMC treated by hypoxia （CMC： hypoxia ＋ verapamil, 100.9± 28.2; hypoxia ＋ nifedipine, 107.6± 27.7; P 〈 0.01）. The results showed hypoxia could increase intracellular Ca^2＋ concentration of CMC, and the Ca^2＋ antagonist could restrain the Ca^2＋ influx across the cell membrane of CMC treated by hypoxia.

关键词： broiler chicken cardiac muscle cell,Ca^2+ hypoxia

在线全文

学校读者我要写书评

暂无评论

线性周期切换系统的渐近稳定性

辽宁工程技术大学学报（自然科学版） 2006年第1期25卷 158-160页

作者：孙文安董世山邹开其陈刚大连大学信息工程学院辽宁大连116622 大连大学辽宁省智能信息处理重点实验室辽宁大连116622 辽宁工程技术大学基础科学部辽宁阜新123000

为了研究一类线性周期切换系统的全局渐近稳定性问题,基于驻留时间的方法,当切换系统的各子系统均为稳定的情况下,给出了切换周期的最小下界;当切换系统中含有不稳定的子系统,建立了稳定子系统的驻留时间总和与不稳定子系统的驻留时间... 详细信息

为了研究一类线性周期切换系统的全局渐近稳定性问题,基于驻留时间的方法,当切换系统的各子系统均为稳定的情况下,给出了切换周期的最小下界;当切换系统中含有不稳定的子系统,建立了稳定子系统的驻留时间总和与不稳定子系统的驻留时间总和之间的关系;同时当各子系统的驻留时间均等时,得到了切换周期的设计条件。这些充分条件对于判断一类线性周期切换系统的渐近稳定性具有实用性。仿真结果表明所提出的切换方法是有效的。

关键词：周期切换系统渐近稳定性驻留时间切换律 Hurwitz稳定

Graphene Aerogel Composites with Self‑Organized Nanowires‑Packed Honeycomb Structure for Highly Efficient Electromagnetic Wave Absorption

在线全文

学校读者我要写书评

暂无评论

Nano-Micro Letters 2025年第2期17卷 533-547页

作者： Xiao You Huiying Ouyang Ruixiang Deng Qiuqi Zhang Zhenzhong Xing Xiaowu Chen Qingliang shan Jinshan Yang Shaoming dong State Key Laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050People’s Republic of China Key Laboratory of Inorganic Coating Materials CAS Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050People’s Republic of China Structural Ceramics and Composites Engineering Research Center Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050People’s Republic of China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049People’s Republic of China School of Physical Science and Technology ShanghaiTech UniversityShanghai 201210People’s Republic of China School of Materials Science and Engineering Zhejiang Sci-Tech UniversityHangzhou 310018People’s Republic of China University of Chinese Academy of Sciences Beijing 100039People’s Republic of China

With vigorous developments in nanotechnology,the elaborate regulation of microstructure shows attractive potential in the design of electromagnetic wave ***,a hierarchical porous structure and composite heterogeneous interface are constructed successfully to optimize the electromagnetic loss *** macro–micro-synergistic graphene aerogel formed by the ice template‑assisted 3D printing strategy is cut by silicon carbide nanowires(SiC_(nws))grown in situ,while boron nitride(BN)interfacial structure is introduced on graphene *** unique composite structure forces multiple scattering of incident EMWs,ensuring the combined effects of interfacial polarization,conduction networks,and magnetic-dielectric ***,the as-prepared composites present a minimum reflection loss value of−37.8 dB and a wide effective absorption bandwidth(EAB)of 9.2 GHz(from 8.8 to 18.0 GHz)at 2.5 ***,relying on the intrinsic high-temperature resistance of SiC_(nws) and BN,the EAB also remains above 5.0 GHz after annealing in air environment at 600℃ for 10 h.

关键词： Hierarchical porous structure Interface High-temperature resistance Graphene aerogel composites Electromagnetic wave absorption

Metal-organic frameworks with dinuclear metal centers for synergistically boosting CO2 photoreduction

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2025年第1期68卷 201-208页

作者： Hui-Feng Wang Wen-Jie shi Yu-Xin Yang Bao-Xia dong Tong-Bu Lu Di-Chang Zhong School of Chemistry and Chemical Engineering Yangzhou University Institute for New Energy Materials and Low Carbon Technologies School of Materials Science and Engineering Tianjin University of Technology

Dinuclear metal synergistic catalysis （DMSC） has been proved powerful in boosting CO2reduction,while this has not been achieved in heterogeneous catalysts with long-range order *** this study,we,by introduction of metal catalytic centers into an indium-based metal-organic framework （MOF）,obtained a series of isostructural In-MOFs,including three MOFs with mononuclear metal catalytic center （M-In）,three MOFs with dinuclear homometallic catalytic centers （MM-In）,and three MOFs with dinuclear heterometallic catalytic centers (MM’-In,M/M’=Co（II）,Ni（II）,Zn（II）).It was found that all these MOFs can serve as catalysts for photochemical CO2reduction to *** with M-In,the catalytic activities of MM-In were obviously enhanced,and that of MM’-In was further significantly *** example,the CO yield of Co Zn-In reaches a record value of 12,700μmol g-1h-1,which is 4.0,8.1,9.4,and 18.6-fold higher than that of Co Co-In,Zn Zn-In,Co-In,and Zn-In,***,the catalytic activities of Co Ni-In and Ni Zn-In also show different fold increase than those of corresponding dinuclear homometallic and mononuclear metallic *** results of control experiments and theoretical calculation reveal that the higher catalytic activities of MM-In over M-In can be ascribed to the DMSC effect,and the higher catalytic activity of MM’-In over MM-In can be ascribed to the strengthened DMSC *** work reveals the relationship between DMSC effect and bimetal centers in CO2reduction,which provides new insights into the DMSC and paves a new way to design highly active catalysts for photochemical CO2reduction.

关键词： metal-organic frameworks dinuclear metal centers synergistic catalysis CO2 reduction photocatalysis

Enhanced subacute ischemic stroke treatment via multistage drug delivery system design for combination therapy

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Science China Chemistry 2025年

作者： Xihan Xu Juan-Juan Li Jiamin Li Hui-Yan Zhang Yilin Qi Bing-Sen shi Tianqi Li shan-shan Su Weitao Zhao Chang Chen Zhongying Gong Huiyu Liu Ke-Rang Wang dong-Sheng Guo Xue Xue State Key Laboratory of Medicinal Chemical Biology College of Pharmacy Nankai University College of Chemistry State Key Laboratory of Elemento-Organic Chemistry Key Laboratory of Functional Polymer Materials (Ministry of Education) Frontiers Science Center for New Organic Matter Collaborative Innovation Center of Chemical Science and EngineeringNankai University College of Chemistry and Materials Science State Key Laboratory of New Pharmaceutical Preparations and Excipients Key Laboratory of Medicinal Chemistry and Molecular Diagnosis (Ministry of Education) Key Laboratory of Chemical Biology of Hebei Province Hebei Research Center of the Basic Discipline of Synthetic Chemistry Hebei University Department of Neurology Tianjin First Central Hospital School of Medicine Nankai University Beijing Advanced Innovation Center for Soft Matter Science and Engineering State Key Laboratory of Organic-Inorganic Composites Beijing Laboratory of Biomedical Materials Bionanomaterials & Translational Engineering Laboratory Beijing Key Laboratory of BioprocessBeijing University of Chemical Technology

The management of acute ischemic stroke remains challenging due to its abrupt onset and the narrow treatment window,resulting in high rates of disability and *** therapy for neuroprotection and neurorepair strategies provided new hopes for subacute stroke *** we designed a multistage nanodelivery system that matches the unique microenvironment of the subacute phase of stroke,which utilizes calixarene as a building block to effectively load the neuroprotective drug *** calixarene is designed with glycosidic linkages targeting the glucose transporter 1 (GLUT1)on the blood-brain barrier (BBB) and azo bonds that are responsive to hypoxic ***,the decomposed calixarene molecules themselves possess intrinsic bio-activation to modulate inflammatory responses,achieving a multistage therapeutic approach that transitions from targeting to release and finally to *** approach combines anti-inflammation and neuroprotection,providing a multi-level treatment *** system was validated in a rat model of permanent middle cerebral artery occlusion (pMCAO),demonstrating that intravenous administration of the nanodelivery system repairs brain damage and improves motor function 24 h post-pMCAO *** work offers a precise and integrative strategy for stroke patients missing the acute therapy window to improve functional recovery and enhance the effect of comprehensive treatment.

关键词：

Alteration mechanism and classification and mechanical properties of altered granite

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Earth Science 2025年

作者： dong Jinyu shi shang LIU Handong REN Minghao LI Jianyong North China University of Water Resources and Electric Power College of Geosciences and Engineering， North China University of Water Resources and Electric Power

Altered rock， often encountered in major engineering projects， can seriously affect the stability of rocks and slopes surrounding deeply buried tunnels. This study addressed the alteration mechanism， alteration degree classification， and mechanical parameters of altered rock in engineering project areas using field testing， thin slice identification， X-ray diffraction， and major element testing. Results showed that the altered rock types in the areas of the Pingjiang Pumped Storage Power Station (Hunan Province) and a diversion tunnel in northern Xinjiang include biotite granodiorite， biotite monzogranite， and cataclastic granite， and that the main alteration mechanisms are chloritization of biotite and clayization of feldspar minerals. The altered rocks were classified as slightly， moderately， or strongly altered according to their apparent characteristics， rebound value， longitudinal wave velocity， metamorphic mineral content， and porosity. The bulk density， elastic modulus， cohesion， and internal friction angle (Poisson’s ratio) of the altered rocks decreased (increased) with increase in the degree of alteration. Numerical simulations showed that in altered rock slope areas， the zone of strong rock alteration and the moderate–strong alteration contact zone exhibit locally large deformations that represent certain hazard to engineering projects. These results provide valuable guidance and support for major projects in altered rock areas.

关键词：

AQDS Enhances Degradation of BDE-47 by Promoting Shewanella oneidensis MR-1-mediated Fenton Reaction with Fe(III)-containing Minerals

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Earth Science 2025年

作者： Yongguang Jiang Siqi Zhu Zhou Jiang Yiran dong Liang shi School of Environmental Studies， China University of Geosciences State Key Laboratory of Biogeology and Environmental Geology， China University of Geosciences Hubei Key Laboratory of Yangtze Catchment Environmental Aquatic Science， China University of Geosciences State Environmental Protection Key Laboratory of Source Apportionment and Control of Aquatic Pollution， Ministry of Ecology and Environment， China University of Geosciences(Wuhan)

Electron shuttles are widespread in the environments and play important role in microbe-mineral interaction. This study investigated the effects of a model electron shuttle (i.e.， anthraquinone-2， 6-disulfonate， AQDS) on Shewanella oneidensis MR-1-mediated Fenton reaction and subsequent degradation of 2， 2′， 4， 4′-tetrabrominated diphenyl ether (BDE-47). Three Fe(III)-containing minerals， namely， ferrihydrite， goethite and nontronite， were used as electron acceptors and Fe(II) sources. With each mineral， additions of 0.01 – 1 mM AQDS in the reactions significantly enhanced Fe(III) reduction by S. oneidensis MR-1 and increased the amounts of Fe(II) produced in anoxic phase. As a result， the amounts of cumulative ·OH formed in oxic phase were increased by 10% – 287%. Regression analysis revealed that ·OH cumulation has significant linear correlation with sorbed Fe(II) but not aqueous and structural Fe(II). This finding may be ascribed to the higher reactivity of sorbed Fe(II) in oxygenation than the latter two types of Fe(II). With more ·OH， the degradation efficiency of BDE-47 was elevated by 31% – 173%. Collectively， AQDS enhances ·OH formation and BDE-47 degradation by promoting production of Fe(II)， particularly sorbed Fe(II) in S. oneidensis MR-1-mediated Fenton reaction with Fe(III)-containing minerals.

关键词：

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

深基坑支护工程冠梁内力现场试验研究

建筑科学 2006年第4期22卷 43-46页

作者：王建军石东山黄强中国建筑科学研究院北京100013 河南省郑州水利学校郑州450008

通过在支护桩的冠梁内埋设钢筋应力计,对某深基坑冠梁内力进行现场测试,据此分析了冠梁受力特性及冠梁内力和弯矩随基坑开挖进程的变化规律。研究表明,冠梁是一个受弯构件,内力和弯矩值随基坑开挖进程不断变化,冠梁外侧两端受拉力作用,... 详细信息

通过在支护桩的冠梁内埋设钢筋应力计,对某深基坑冠梁内力进行现场测试,据此分析了冠梁受力特性及冠梁内力和弯矩随基坑开挖进程的变化规律。研究表明,冠梁是一个受弯构件,内力和弯矩值随基坑开挖进程不断变化,冠梁外侧两端受拉力作用,中间部位受压力作用;内侧两端受压力作用,中间受拉力作用。

关键词：深基坑冠梁现场试验内力弯矩