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THE NASCENT BAINITE IN SILICON STEEL

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Chinese Science Bulletin 1990年第13期35卷 1125-1128页

作者：刘庆锁龚方岳陈玉如殷福星刘文西 Department of material Science and analysis center Tianjin University Tianjin 300072 PRC

Bainite midrib was observed by LIU Wen-xi and his coworkers in 1981. They indicated that the midribs in steel were bainite shear nuclei with two dimensions. In 1986, Okamoto carried out a systematic study on bainite m... 详细信息

关键词： bainite midrib shear deformation ledge.

Cathodic phosphate coating containing nano zinc particles on magnesium alloy

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中国有色金属学会会刊：英文版 2008年第A1期18卷 365-368页

作者：牛丽媛 Zhejiang Industry and Trade Polytechnic Advanced Material Research and Development.Center

A technology for preparation of a cathodic phosphate coating mainly containing nano metallic zinc particles and phosphate compounds on magnesium alloy was *** influence of cathodic current density on the microstructure of the cathodic phosphate coating was *** results show that the crystals of the coating are finer and the microstructures of the outer surface of the coatings are zigzag at the cathodic density of 0.2-0.5 A/dm^*** content of nano metallic zinc particles in the coating decreases with the increase of the thickness of the coatings and tends to be zero when the coating thickness is 4.14μ*** cathodic phosphate coating was applied to be a transition coating for improving the adhesion between the paints and the magnesium alloys. The formation mechanism of the cathodic phosphate coating was investigated as well.

关键词：镁合金电脉材料微观组织分析

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

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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

MISCIBILITY, THERMAL STABILITY AND RETENTION OF PVP FOR CROSSLINKED PVA/PVP BLENDS

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Chinese Journal of Polymer Science 1994年第3期12卷 201-209页

作者：梁国眉张堃冯榕荫 Instrumentation analysis & research center Zhongshan University Guangzhou Guangdong 510275

The thermal behavior, miscibility, crystallite conformation and thermal stability ofcrosslinked(CL-) PVA/PVP blends were studied by DSC and TG methods, respectively. DSCresults showed that in the blend, the crystallinity,T_m and T_c of PVA were obviously lower thanthose of pure PVA; the crystal growth changed from three dimensional to two dimensional andonly a single T_g was detected. These facts demonstrated that this crystalline and amorphousblend have good miscibility. TG curves showed that providing the quantity of K_2S_2O_8 added ismore than 3 wt%,in the blends PVA will form a stable CL-network, whose thermal degradationtemperature was near to that of PVP. But crosslinking reaction will not take place for PVP. Theprocesses of thermal degradation of CL-blends are based on combining both the thermaldegradation of PVP and that of PVA crosslinked with corresponding quantity of K_2S_2O_8 CL-agent, respectively. The UV measurements showed that 75 wt% of PVP may be remained in CL-blend hydrogelscrosslinked by adding (3--5 wt% )K_2S_2O_8. This is mainly due to the stable CL-network formed and the good compatibility and properentanglement between the composites in the CL-blends.

关键词： Crosslinked PVA/PVP blends Miscibility Thermal stability Hydrogel network

Molecular structure of [(trien)Zn(im)Zn(trien)](ClO_4)_3 complex and ESR spectra of its single-crystal doped with [(trien)Cu(im)Zn(trien)l(ClO_4)_3 complex

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Science China Chemistry 1996年第2期39卷 123-134页

作者：毛宗万江丽娟韩世莹唐雯霞陈民勤A 刘捷 State Key Laboratory of Coordination Chemistry Institute of Coordination Chemistry and Centre of Material Analysis Nanjing University Nanjing 210093 ChinaState Key Laboratory of Coordination Chemistry Institute of Coordination Chemistry and Centre of Material Analysis Nanjing University Nanjing 210093 ChinaState Key Laboratory of Coordination Chemistry Institute of Coordination Chemistry and Centre of Material Analysis Nanjing University Nanjing 210093 ChinaState Key Laboratory of Coordination Chemistry Institute of Coordination Chemistry and Centre of Material Analysis Nanjing University Nanjing 210093 ChinaResearch Centre of Analysis and Measurement Fudan University Shanghai 200433 ChinaResearch Centre of Analysis and Measurement Fudan University Shanghai 200433 China

The crystal structure of the title complex was measured, in which the two zinc atoms with coordination polyhedron of distorted tetragonal pyramid (TP) are bridged by an imidazolate in the apical position of the TP forming a dimer. The isomorphous [(trien)Cu(im)Zn(trien)](ClO4)3·H2O complex was doped in the title complex and the recorded single-crystal ESR spectra by fitting gave two sets of the principal values of g and A tensors, which were assigned to the physically distinct sites of the two magnetically equivalent molecules in the unit cell. Lattice distortion at the Cu(II) ion sites and the bonding parameters of Cu(II) ions are further calculated, and the bonding nature of Cu(II) ions is discussed.

关键词： Cu Zn-SOD model single-crystal ESR g tensor A tensor bonding parameters.

Synthesis and Characterization of Highly Efficient Photoluminescence Gd doping Hexagonal CePO4 (One-dimensional Nanowires)

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Chinese Journal of Structural Chemistry 2020年第8期39卷 1515-1521,1361页

作者： ZHANG Xin-Qi Instrumentation analysis and research center Fuzhou UniversityFuzhou 350108China

Rare earth phosphates have been used extensively in luminescent *** Ce1-xGdxPO4 with crystal field manipulation was successfully synthesized using a hydrothermal *** photoluminescence emission intensity of hexagonal CePO4 was obviously enhanced by the crystal structure manipulation with gadolinium ions *** to pure CePO4,the intensity photoluminescence was enhanced about 15 folds with x=*** effect of gadolinium doping was systematically investigated by X-ray diffraction,transmission electron microscopy,X-ray photoelectron spectroscopy and photoluminescence *** field asymmetry can be effectively tuned by different amount of Gd^3+codoping,and the crystal field asymmetry is conductive to electron population of high energy level of Ce^3+*** material has potential applications in optics,electronics fields,and so ***,the method can be extended to another kind of high performance photoluminescence materials preparation.

关键词： rare earth hydrothermal photoluminescence gadolinium dopant crystal field

Systematical identification of regulatory GPCRs by single-cell trajectory inference reveals the role of ADGRD1 and GPR39 in adipogenesis

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Science China Life Sciences 2025年

作者： Chuan Ye Xuemei Wang Jun Lin Chenyang Wu Yuhua Gao Chenghao Guo Yunxi Liao Ziyan Rao Shaodong Huang Weixuan Chen Ying Huang Jinpeng Sun Dongyu Zhao Changtao Jiang center of Basic Medical research Institute of Medical Innovation and ResearchPeking University Third Hospital Department of Physiology and Pathophysiology School of Basic Medical SciencesPeking University Department of Biomedical Informatics School of Basic Medical SciencesPeking University State Key Laboratory of Vascular Homeostasis and Remodeling Peking University center for Obesity and Metabolic Disease research School of Basic Medical SciencesPeking University State Key Laboratory of Female Fertility Promotion Center for Reproductive MedicineDepartment of Obstetrics and GynecologyPeking University Third Hospital National Clinical research center for Obstetrics and Gynecology Peking University Third Hospital Department of Endocrinology and Metabolism Peking University Third Hospital Key Laboratory Experimental Teratology of the Ministry of Education Department of Biochemistry and Molecular BiologySchool of Basic Medical SciencesCheeloo College of MedicineShandong University Department of Immunology School of Basic Medical SciencesPeking University

Adipogenesis is the healthy expansion of white adipose tissue (WAT),serving as a compensatory response to maintain metabolic homeostasis in the presence of excess energy in the ***,the identification of novel regulatory molecules in adipogenesis,specifically membrane receptors such as G protein-coupled receptors (GPCRs),holds significant clinical *** receptors can serve as viable targets for pharmaceuticals,offering potential for restoring metabolic homeostasis in individuals with *** utilized trajectory inference methods to analyze three distinct single-nucleus sequencing (sNuc-seq) datasets of adipose tissue and systematically identified GPCRs with the potential to regulate *** verification in primary adipose progenitor cells (APCs) of mice,we discovered that ADGRD1 promoted the differentiation of APCs,while GPR39 inhibits this *** the obese mouse model induced by a high-fat diet(HFD),both gain-of-function and loss-of-function studies validated that ADGRD1 promoted adipogenesis,thereby improving metabolic homeostasis,while GPR39 inhibited adipogenesis,leading to metabolic ***,through the analysis of 2,400 ChIP-seq data and 1,204 bulk RNA-seq data,we found that the transcription factors (TFs) MEF2D and TCF12 regulated the expression of ADGRD1and GPR39,*** study revealed the regulatory role of GPCRs in adipogenesis,providing novel targets for clinical intervention of metabolic dysfunction in obese patients.

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Synthesis of surface sulfated BiWO with enhanced photocatalytic performance

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Journal of Environmental Sciences 2012年第12期24卷 2180-2190页

作者： Yongming Ju Jianming Hong Xiuyu Zhang Zhencheng Xu Dongyang Wei Yanhong Sang Xiaohang Fang Jiande Fang Zhenxing Wang South China Institute of Environmental Science Ministry of Environmental ProtectionGuangzhou 510655China center of material analysis Nanjing UniversityNanjing 210093China

Sulfated BiWO （SBiWO） was synthesized by an impregnation method to enhance the visible-light-driven photoactivities of BiWO （BiWO）. The characterization results verified that sulfate anion mainly anchored on the catalyst surface greatly extended the visible- light-responsive range without destroying the crystal lattice. Moreover, the SBiWO-based photoactivities were evaluated with the removal of Malachite Green （MG） under UV-Vis irradiation emitted from two microwave-powered electrodeless discharge lamps （MPEDL_2） and under visible light （L 〉 420 nm）. The results demonstrated that the kinetic constant was increased 2.25 times, varying from 0.1478 （BiWO） to 0.3328 rain-1 （SBiWO- 1 ）. Similar results were also obtained for the visible light-driven reaction. Furthermore, radical scavengers such as t-butanol restricted the visible-light induced degradation of MG over BiWO and SBiWO-1. This indicated that the sulfating process increased the generation of reactive oxygen species, which was further verified by molecular probe with salicylic acid. Thus, more blue-shifting at k = 618 nm was observed over SBiWO. On the basis of the above results, the photocatalytic mechanism over the sulfated catalyst was also discussed.

关键词： sulfated BiWO photocatalytic Malachite Green visible light microwave

Movement analysis in the diagnosis and management of Parkinson’s disease

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Neural Regeneration research 2025年第2期20卷 485-486页

作者： Johannes Burtscher Nicolas Bourdillon Jules MJanssen Daalen Aurélien Patoz Julien FBally Martin Kopp Davide Malatesta Bastiaan RBloem Institute of Sport Sciences University of LausanneLausanneSwitzerland Radboud University Medical center Department of NeurologyDonders Institute for BrainCognition and BehaviorCenter of Expertise for Parkinson and Movement DisordersNijmegenThe Netherlands Radboud University Medical center Department of Medical BioSciencesNijmegenThe Netherlands research and Development Department Volodalen Swiss Sport LabAigleSwitzerland Service of Neurology Department of Clinical NeurosciencesLausanne University Hospital(CHUV)and University of Lausanne(UNIL)LausanneSwitzerland Department of Sport Science University of InnsbruckInnsbruckAustria

Challenges in the diagnosis and treatment of Parkinson’s disease:Parkinson’s disease(PD)is an increasingly prevalent neurodegenerative disease,at first sight primarily characterized by motor symptoms,although non-motor symptoms also constitute a major part of the overall ***,this disease cannot be diagnosed reliably until a large part of the vulnerable dopaminergic neurons has been irretrievably lost,and the disease progresses *** biological criteria for PD have been proposed recently and might eventually improve early diagnosis,but they require further validation,and their use will initially be restricted to a research environment(Darweesh et al.,2024).

关键词： diagnosis Clinical eventually