检索结果-南通市图书馆

Depression mechanism of sulfite ions on sphalerite and Pb^(2+)activated sphalerite in the flotation separation of galena from sphalerite

在线全文

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 335-345页

作者： Feng zhang Chenyang zhang Linlin Wu Wei Sun Hongliang zhang Jianhua Chen Yong Pei Songjiang Li Engineering Research Center of Ministry of Education for Carbon Emission Reduction in Metal Resource Exploitation and Utilization Hunan International Joint Research Center for Efficient and Clean Utilization of Critical Metal Mineral ResourcesSchool of Minerals Processing and BioengineeringCentral South UniversityChangsha 410083China State Key Laboratory of Mineral Processing Beijing General Research Institute of Mining&MetallurgyBeijing 100160China Hunan Provincial Key Laboratory of Micro&Nano Materials Interfaces Science College of Chemistry and Chemical EngineeringCentral South UniversityChangsha 410083China School of Resources Environment and MaterialsGuangxi UniversityNanning 530004China Department of Chemistry Xiangtan UniversityXiangtan 411105China China Railway Resource Group Co.Ltd Beijing 102300China

The depression mechanism of sulfite ions on sphalerite and Pb^(2+)activated sphalerite in the flotation separation of galena from sphalerite still lacked in-depth ***,the depression mechanism of sulfite ions on sphalerite and Pb^(2+)activated sphalerite in the flotation separation of galena from sphalerite was further systematically investigated with experiments and density functional theory(DFT)*** X-ray photoelectric spectroscopy(XPS)results,DFT calculation results,and frontier molecular orbital analysis indicated that sulfite ions were difficult to be adsorbed on sphalerite surface,suggesting that sulfite ions achieved depression effects on sphalerite through other non-adsorption ***,the oxygen content in the surface of sphalerite treated with sulfite ions in creased,which enhanced the hydrophilicity of the sphalerite and further increased the difference in hydrophilicity between sphalerite and ***,sulfite ions were chelated with lead ions to form PbSO_(3)in *** hydrophilic PbSO_(3)was more easily adsorbed on sphalerite than *** interaction between sulfite ions and lead ions could effectively inhibit the activation of *** addition the UV spectrum showed that after adding sulfite ions,the peak of perxanthate in the sphalerite treated xanthate solution was significantly stronger than that in the galena with xanthate solution,indicating that xanthate interacted more readily with sulfite ions and oxygen mo lecules within the sphalerite system,leading to the formation of ***,sulfite ions hardly depressed the flotation of ga lena and could promote the flotation of galena to some *** study deepened the understanding of the depression mechanism o sulfite ions on sphalerite and Pb^(2+)activated sphalerite.

关键词： sphalerite galena sulfite ion density functional theory depression mechanism

H_(2)O_(2) actuated molybdenum oxide nanodots:Multi-enzyme-like activities,leverage of Fenton reaction,and dual-mode sensitive detection of alendronate sodium

在线全文

学校读者我要写书评

暂无评论

Nano Research 2023年第10期16卷 12106-12115页

作者： Siqi Wang Yao jin Wenhui Ai Xiufeng Wang Zhiqing zhang ting Zhou Guodong zhang Fang Wang Department of Chemistry College of Chemistry and Chemical EngineeringChina University of Petroleum(East China)Qingdao 266580China

Unexpected benefits to the catalytic performance of materials often originate from the presence of surface ***,novel Dpenicillamine modified molybdenum oxide nanodots,with abundant oxygen vacancy defects,were fabrication by a mild,simple,and cost-effective ***–visible(UV–Vis)absorption spectra analysis showed that the nanodots had peroxidaselike and catalase-like *** reactive oxygen species were probed by electronic paramagnetic resonance technique and spectroscopic methods,demonstrating that the nanodots also had oxidase-like ***,the peroxidase-like activity of nanodots was synergistically enhanced in the presence of ferrous ions or ferric ***,less than nanomolar levels of ferrous ions were required to display this phenomenon,meaning Fenton reagent acted as *** on this,a sensitive colorimetric and fluorescent dual-mode sensor for alendronate sodium was *** linear ranges for colorimetric and fluorescence analysis were 0.2–2.5 and 0.2–2.0μM,with detection limits of 31.21 and 71.84 nM,*** method has a simple large-scale material preparation process with higher sensitivity and shorter reaction time,which can inspire and enlighten the design of nanozyme sensors.

关键词： nanozyme molybdenum oxide Fenton reaction alendronate sodium multi-enzyme-like activities

Inner fission barriers of uranium isotopes in the deformed relativistic Hartree-Bogoliubov theory in continuum

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

Chinese Physics C 2024年第10期48卷 214-221页

作者： Wei zhang jin-Ke Huang ting-ting Sun jing Peng Shuang-Quan zhang School of Physics Zhengzhou UniversityZhengzhou 450001China Department of Physics Beijing Normal UniversityBeijing 100875China State Key Laboratory of Nuclear Physics and Technology School of PhysicsPeking UniversityBeijing 100871China

The inner fission barriers of the even-even uranium isotopes from the proton to the neutron drip line are examined using the deformed relativistic Hartree-Bogoliubov theory in continuum.A periodic-like evolution for the ground state shapes is shown with respect to the neutron number,i.e.,spherical shapes at shell closures 126,184,258,and prolate dominated shapes between *** to the shape evolution,the inner fission barriers also exhibit a periodic-like behavior:peaks at the shell closures and valleys in the *** triaxial effect on the inner fission barrier is evaluated using triaxial relativistic mean field calculations combined with a simple BCS method for *** the triaxial correction is included,the inner barrier heights show good consistency with available empirical ***,the evolution from the proton to the neutron drip line aligns with results from the multi-dimensionally constrained relativistic mean field theory.A flat valley in the fission barrier height is predicted around the neutron-rich nucleus U which may play a role of fission recycling in astrophysical r-process nucleosynthesis.

关键词： inner fission barrier potential energy curve triaxiality deformed relativistic Hartree-Bogoliubov theory in continuum

ImSpiRE: image feature-aided spatial resolution enhancement method

在线全文

学校读者我要写书评

暂无评论

Science China Life Sciences 2025年第1期 272-283页

作者： Yuwei Hua Yizhi zhang Zhenming Guo Shan Bian Yong zhang State Key Laboratory of Cardiovascular Diseases and Medical Innovation Center Institute for Regenerative MedicineDepartment of NeurosurgeryShanghai East HospitalShanghai Key Laboratory of Signaling and Disease ResearchFrontier Science Center for Stem Cell ResearchSchool of Life Sciences and TechnologyTongji University

The resolution of most spatially resolved transcriptomic technologies usually cannot attain the single-cell level, limiting their applications in biological discoveries. Here, we introduce ImSpiRE, an image feature-aided spatial resolution enhancement method for in situ capturing spatial transcriptome. Taking the information stored in histological images, ImSpiRE solves an optimal transport problem to redistribute the expression profiles of spots to construct new transcriptional profiles with enhanced resolution, together with extending the gene expression profiles into unmeasured regions. Applications to multiple datasets confirm that ImSpiRE can enhance spatial resolution to the subspot level while contributing to the discovery of tissue domains, signaling communication patterns, and spatiotemporal characterization.

关键词：

同方期刊数据库

Structural design of organic battery electrode materials:from DFT to artificial intelligence

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2023年第10期42卷 3269-3303页

作者： ting-ting Wu Gao-Le Dai jin-Jia Xu Fang Cao Xiao-Hong zhang Yu Zhao Yu-Min Qian Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices Soochow UniversitySuzhou215123China College of Materials Chemistry and Chemical EngineeringHangzhou Normal UniversityHangzhou311121China Department of Chemistry and Biochemistry University of Missouri–St.LouisSt.LouisMO63121USA Department of Health Technology Technical University of DenmarkKgs.Lyngby2800Denmark Key Lab of Advanced Optoelectronic Quantum Architecture and Measurement Beijing Key Lab of Nanophotonics and Ultrafine Optoelectronic Systemsand School of PhysicsBeijing Institute of TechnologyBeijing100081China

Redox-active organic materials are emerging as the new playground for the design of new exciting battery materials for rechargeable batteries because of the merits including structural diversity and tunable electrochemical properties that are not easily accessible for the inorganic *** importantly,the sustainability developed by using naturally abundant chemical elements(C,H,N,O and S) makes them as an ideal alternative material for Li-ion batteries(LIBs).However,the identification and screening of proper organic materials is still challenging in the past *** by the artificial intelligence,this review will give a summary of the theoretical design aspects of redox-active organic materials from densityfunctional theory(DFT) to machine learning(ML) methods in the past two decades,with a particular emphasis on the calculation method to predict the chemical/electrochemical stability and *** review will also analyze and discuss the challenges and perspectives for the development of organic battery materials.

关键词： Organic battery Density-functional theory(DFT) High-throughput computation Machine learning(ML)

Targeting Epac2 and GluA3-containing AMPARs:a novel therapeutic strategy for Alzheimer's disease

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第11期20卷 3223-3224页

作者： Tong zhang Martina Schmidt Department of Molecular Pharmacology Groningen Research Institute of PharmacyUniversity of GroningenGroningenThe Netherlands School of Pharmacy Tianjin Medical UniversityTianjinChina

Alzheimer's disease(AD)is a neurodegenerative disease that manifests progressive decline in memory and *** the early stage of AD,memory retrieval is impaired preceding memory acquisition and consolidation(Roy et al.,2016).Prior to the onset of symptoms,pathological amyloid-β(Aβ)plagues and tau protein tangles accumulate in extracellular and intracellular spaces,respectively,leading to *** these hallmark pathologies,Aβ is proposed to be the primary etiology by triggering a cascade of pathogenic events,including neuroinflammation,oxidative stress,tau hyperphosphorylation,synaptic/neuronal dysfunction,and neuronal death(zhang et al.,2023b).

关键词： Alzheimer impaired Aβ

S-acylation of YKT61 modulates its unconventional participation in the formation of SNARE complexes in Arabidopsis

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10期51卷 1079-1088页

作者： ting Ma Jun-Ru Tan jin-Yu Lu Sha Li Yan zhang College of Life Sciences Shandong Agricultural UniversityTaianShandong 271018China Frontiers Science Center for Cell Responses College of Life SciencesNankai UniversityTianjin 300071China

Hetero-tetrameric soluble N-ethylmaleimide-sensitive factor attachment protein receptors(SNAREs)complexes are critical for vesicle-target membrane fusion within the endomembrane system of eukaryotic *** assembly involves four different SNARE motifs,Qa,Qb,Qc,and R,providedby three orfour SNARE ***6 is an atypical R-SNARE that lacks a transmembrane domain and is involved in multiple vesicle-target membrane *** YKT6 is evolutionarily conserved and essential,its function and regulation in different phyla seem *** YKT61,the yeast and metazoan YKT6 homologue,is essential for gametophytic development,plays a critical role in sporophytic cells,and me-diates multiple vesicle-target membrane ***,its molecular regulation is *** report here that YKT61 is *** its S-acylation by a C195S mutation dissociates YKT61 from endomembrane structures and causes its functional *** interacting with various SNARE pro-teins,YKT61functions not as a canonical R-SNAREbut coordinates with otherR-SNAREs to participate in theformationof ***-specific molecular regulation of YKT6 may be evolvedto allow more efficient SNARE assembly in different eukaryotic cells.

关键词： Longin domain S-acylation Vesicle trafficking R-SNARE Arabidopsis thaliana

Poly(methyl methacrylate)-induced Microstructure and Hydrolysis Behavior Changes of Poly(L-lactic acid)/Carbon Nanotubes Composites

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

Chinese Journal of Polymer Science 2020年第2期38卷 195-204,I0008页

作者： Xu Yu Xin-Zheng jin ting Huang Nan zhang Xiao-Yu Li Yong Wang School of Materials Science&Engineering Key Laboratory of Advanced Technologies of Materials(Ministry of Education)Southwest Jiaotong UniversityChengdu 610031China College of Polymer Science and Engineering Sichuan UniversityChengdu 610065China

Poly(L-lactic acid)(PLLA)-based composites exhibit wide applications in many ***,most of hydrophilic fillers usually accelerate the hydrolytic degradation of PLLA,which is unfavorable for the prolonging of the service life of the *** this work,a small quantity of poly(methyl methacrylate)(PMMA)(2 wt%-10 wt%)was incorporated into the PLLA/carbon nanotubes(CNTs)*** effects of PMMA content on the dispersion of CNTs as well as the microstructure and hydrolytic degradation behaviors of the composites were systematically *** results showed that PMMA promoted the dispersion of CNTs in the *** PLLA was obtained in all the *** enhanced hydrolytic degradation resistance was achieved by incorporating PMMA,especially at relatively high PMMA *** 10 wt%PMMA led to a dramatic decrease in the hydrolytic degradation rate from 0.19%/h of the PLLA/CNT composite sample to 0.059%/h of the PLLA/PMMA-10/CNT composite *** microstructure evolution of the composites was also detected,and the results showed that no crystallization occurred in the PLLA *** results based on the interfacial tension calculation showed that the enhanced hydrolytic degradation resistance of the PLLA matrix was mainly attributed to the relatively strong interfacial affinity between PMMA and CNTs,which prevented the occurrence of hydrolytic degradation at the interface between PLLA and *** work provides an alternative method for tailoring the hydrolytic degradation ability of the PLLA-based composites.

关键词： Poly(L-lactic acid)composites Poly(methyl methacrylate) Microstructure Hydrolytic degradation

Effects of logging on the trade-off between seed and sprout regeneration of dominant woody species in secondary forests of the Natural Forest Protection Project of China

在线全文

学校读者我要写书评

暂无评论

Ecological Processes 2022年第1期11卷 171-188页

作者： Rong Li Qiaoling Yan jin Xie jing Wang ting zhang Jiaojun Zhu Qingyuan Forest CERN National Observation and Research StationShenyang 110016Liaoning ProvinceChina CAS Key Laboratory of Forest Ecology and Management Institute of Applied EcologyChinese Academy of SciencesShenyang 110016China University of Chinese Academy of Sciences Beijing 100049China Key Laboratory of Agricultural Water Resources Hebei Key Laboratory of Soil EcologyCenter for Agricultural Resources ResearchInstitute of Genetic and Developmental BiologyChinese Academy of SciencesShijiazhuang 050021China

Background:Promoting natural regeneration(including seed and sprout regeneration)of dominant woody species is essential for restoring secondary ***,such restoration processes have been decelerated by the enclosure under Natural Forest Protection Project of China(NFPP).It remains unclear how to implement appropriate management measures(e.g.,whether to apply logging and the suitable intensity)to facilitate natural regeneration according to the responses of two regeneration modes to management *** monitored the early stages of seed regeneration(seed rain,soil seed bank,and 1–3-year-old seedlings)and sprout regeneration(stump sprout rate,stump survival rate,probability of sprouting,and number of sprouts per stump)over the first 3 years(2017–2019)after logging under three intensity regimes(control[0%],25%,and 50%logging intensity)in secondary ***:The seed rain density decreased markedly,seedling density increased insignificantly after logging,and logging promoted seedling survival at an increasing conversion rate of 3-year-old seedlings(37.5%under 0%,100%under 25%,and 80.95%under 50%logging)compared to those of the *** proportion of 3-year-old seedlings increased with logging intensity and was the highest(16.2%)at 50%logging *** density was not affected by logging intensity,however,under 25%and 50%logging,it decreased by 27%and 6%in 2018,and by 37%and 33%in 2019,*** density was 41.65-and 15.31-fold higher than that of sprouts in the 50%and 25%logging treatments,*** on the relative contributions of the two regeneration modes after logging,three groups of natural regeneration patterns were classified for dominant woody species in temperate secondary forests,i.e.,seed regeneration preference(Betula dahurica,Carpinus cordata and Fraxinus mandshurica),sprout regeneration preference(Acer mono and Acer pseudosieboldianum)and no preference(Quercus mongolica,Fraxinus rhynchophylla,and Juglans ma

关键词： Secondary forest Seed regeneration Sprout regeneration Seedling recruitment Light availability