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Design of advanced porous silver powder with high-sintering activity to improve silicon solar cells

Nano Research 2024年第4期17卷 3189-3197页

作者： Yongsheng Li Ziwei Chen Rui Zhou Wenguang Zhao Mu Li Jun Chen Zhongyuan Huang jian Liu Yuhang Li Maolin Yang minghan Yu Dong Zhou Yuan Lin feng Pan School of Advanced Materials Peking UniversityShenzhen Graduate SchoolShenzhen 518055China Institute of Advanced Science Facilities Shenzhen 518107China Institute of Zhejiang University-Quzhou Quzhou 324000China Key Laboratory of Photochemistry Institute of ChemistryChinese Academy of SciencesBeijing 100190China Institute of Materials Research(IMR) Tsinghua UniversityTsinghua Shenzhen International Graduate SchoolShenzhen 518055China School of Materials Science and Engineering Harbin Institute of Technology(Shenzhen)Shenzhen 518055China

Silver(Ag)paste is widely used in semiconductor metallization,especially in silicon solar *** powder is the material with the highest proportion in Ag *** morphology and structure of Ag powder are crucial which determine its characteristics,especially for the sintering *** this work,a simple method was developed to synthesize a type of microcrystalline spherical Ag particles(SP-A)with internal pores and the structural changes and sintering behavior were thoroughly studied by combining ultra-small-angle X-ray scattering(USAXS),small-angle X-ray scattering(SAXS),in-situ heating X-ray diffraction(XRD),focused ion beam(FIB),and thermal analysis *** to the unique internal pores,the grain size of SP-A is smaller,and the coefficient of thermal expansion(CTE)is higher than that of traditional solid Ag *** a result,the sintering activity of SP-A is excellent,which can form a denser sintered body and form silver nanoparticles at the Ag–Si interface to improve silver silicon *** silicon solar cell built with SP-A obtained a low series resistance(Rs)and a high photoelectric conversion efficiency(PCE)of 19.26%.These fill a gap in Ag particle structure research,which is significant for the development of high-performance electronic Ag particles and efficient semiconductor devices.

关键词： silver particles small angle X-ray scattering(SAXS) pore size distribution in-situ heating X-ray diffraction(XRD) sintering silicon solar cells

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Development of An Enzyme-Linked Immunosorbent Assay for Determination of the Furaltadone Etabolite,3-Amino-5-Morpholinomethyl-2-Oxazolidinone(AMOZ) in Animal Tissues

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Biomedical and Environmental Sciences 2012年第4期25卷 449-457页

作者： LUO Peng Jie jianG Wen Xiao BEIER Ross C. SHEN jian Zhong jianG Hai Yang MIAO Hong ZHAO Yun feng CHEN Xia WU Yong Ning ministry of Health Key Laboratory China National Center for Food Safety Risk AssessmentBeijing 100021China Department of Veterinary Pharmacology and Toxicology College of Veterinary MedicineChina Agricultural UniversityBeijing 100193China Southern Plains Agricultural Research Center Agricultural Research ServiceU.S.Department of AgricultureCollege StationTexas 77845-4988USA State Key Laboratory for Infectious Disease Prevention and Control National Institute for Communicable Disease Control and PreventionChinese Center for Disease Control and PreventionBeijing 102206China

Objective To determine 3-amino-5-morpholinomethyl-2-oxazolidinone （AMOZ） residues released from protein bound AMOZ in animal tissues. Methods Polyclonal and monoclonal antibodies were produced in this study. A rapid, sensitive, and specific competitive direct enzyme-linked immunosorbent assay （cdELISA） was developed. Results Rabbit polyclonal antibodies were used in the optimized cdELISA method, and exhibited negligible cross-reactivity with other compounds structurally related to AMOZ. The IC50 of the polycional antibody was 0.16 ng/mL The method limit of detection in four different types of animal and fish tissues was less than 0.06 μg/kg. Recoveries ranged from 80% to 220% for fortified samples with the coefficient of variation values less than 15%. The results of the cdELISA method were in good agreement with the results from an established liquid chromatography-tandem mass spectrometry confirmatory method used for AMOZ residues. Conclusion The cdELISA method developed in the present study is a convenient practical tool for screening large numbers of animal and fish tissue samples for the the detection of released protein bound AMOZ residues.

关键词： AMOZ Animal tissue ELISA Fish tissue Furaltadone

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Searches for Dark Matter via Mono-W Production in Inert Doublet Model at the LHC

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Communications in Theoretical Physics 2018年第5期69卷 617-624页

作者： Neng Wan Niu Li Bo Zhang Huan Yang min-Fu Zhao Mao Song Gang Li and jian-You Guo Center of Basic Experiment West Anhui University Lu＇an 237012 China School of Physics and Material Science Anhui University Hefei 230039 China

The Inert Doublet Model(IDM) is one of the many beyond Standard Model scenarios with an extended scalar sector, which provide a suitable dark matter particle candidate. Dark matter associated visible particle production at high energy colliders provides a unique way to determine the microscopic properties of the dark matter particle. In this paper, we investigate that the mono-W + missing transverse energy production at the Large Hadron Collider(LHC),where W boson decay to a lepton and a neutrino. We perform the analysis for the signal of mono-W production in the IDM and the Standard Model(SM) backgrounds, and the optimized criteria employing suitable cuts are chosen in kinematic variables to maximize signal significance. We also investigate the discovery potential in several benchmark scenarios at the 14 TeV LHC. When the light Z_2 odd scalar higgs of mass is about 65 GeV, charged Higgs is in the mass range from 120 GeV to 250 GeV, it provides the best possibility with a signal significance of about 3σ at an integrated luminosity of about 3000 fb^(-1).

关键词： large hadron collider IDM dark matter

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Quality Assessment of FY-4A Lightning Data in Inland China

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Journal of Tropical Meteorology 2020年第3期26卷 286-299页

作者： LIU Rui-xia LU Qi-feng CHEN min ZHANG Yong HUI Wen LI Xiao-qing Key Laboratory of Radiometric Calibration and Validation for Environmental Satellite National Satellite Meteorological CenterChina Meteorological AdministrationBeijing 100081 China Institute of Urban Meteorology China Meteorological AdministrationBeijing 100089 China Meteorological Observation Center China Meteorological AdministrationBeijing 100081 China

The Lightning Mapping Imager(LMI)equipped on the FY-4 A(feng Yun-4 A)geostationary satellite achieves lightning positioning through optical imaging and has the advantages of high temporal resolution,high stability,and continuous *** this study,FY-4 A LMI lightning event,group and flash data from April to August 2018 are selected,and their quality are assessed through qualitative and quantitative comparison with the ground-based Advanced Time of Arrival and Direction system(ADTD)lightning observation network data and the American International Space Station(ISS)lightning imaging sensor(LIS)*** results show that the spatial distributions of FY-4 A lightning are consistent with those of the ground-based ADTD and ISS *** temporal variation in FY-4 A lightning group frequency is consistent with that of ADTD stroke,which reflects that FY-4 A LMI can capture the lightning occurrence in inland *** statistics show that the consistency rate of FY-4 A LMI and ISS LIS events is relatively high but their consistency rate is lower in terms of lightning group and flash *** with the lightning observations by the ISS LIS and the ground-based ADTD,FY-4 A LMI reports fewer lightning events in the Tibetan *** application of Tibetan Plateau lightning data requires further processing and consideration.

关键词： FY-4A lightning data quality assessment inland China ADTD ISS LIS

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Lithium extraction from carbonate-rich Salt Lake brine using HBTA/TBP system

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Rare Metals 2024年第12期43卷 6717-6729页

作者： Lian-min Ji Dong Shi Xiao-Wu Peng Shao-Lei Xie Jin-feng Li Yu-Ze Zhang Li-Cheng Zhang Yong Niu Gang Chen Li-Juan Li Key Laboratory of Green and High-end Utilization of Salt Lake Resources Qinghai Institute of Salt LakesChinese Academy of Sciences Qinghai Engineering and Technology Research Center of Comprehensive Utilization of Salt Lake Resources Shanghai Institute of Organic Chemistry Chinese Academy of Sciences

China's salt lakes hold significant lithium reserves,yet the development of low-concentration lithium resources from the carbonate brines in Tibet is a pressing *** β-diketones extractants are capable of efficiently extracting lithium from alkaline solutions using an extraction method,but its optimized extraction prerequisite is an extreme alkaline solution with higher *** research introduces a process for the effective extraction and separation of lithium and sodium from the carbonate brine of Jieze Caka Salt Lake,utilizing trifluorinated β-biketone HB TA（4,4,4-trifluoro-1-phenyl-1,3-butanedione）-TBP（tributyl phosphate）/kerosene system.A threestage extraction yielded 98.06% of Li+and 1.69% of Na+from the initial brine with a lower pH of 8.961 and a separation factor(βLi/Na) of *** simplified process was then implemented using organic direct recycling without regeneration and scrubbing raffinate reflux for a total of 23 cycles,thereby demonstrating the exceptional effectiveness and stability of this *** resulting lithium-rich stripping solution,with the Li/Na mass ratio amplified by 747 times,underwent further magnesium removal and precipitation using sodium carbonate to yield a high-purity lithium carbonate product of 99.50%.This study offers a novel approach and technology for the efficient separation of lithium ion directly from a partialneutral carbonate salt lake with a high Na/Li ratio and low lithium concentration.

关键词： Carbonated salt lake Diketone extractant Lithium Solvent extraction Tibet brine

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STUDIES　ON　GLYCOSIDES　XVII─STEREOSELECTIVE　SYNTHESIS　OF　（2，6－DIMETIIOXY－4－ETHOXYCARBONYL）　PHENYL　6－O－ACETYL－2，3，4－O－BENZYL－β－D－GLUCOPYRANOSIDE

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Chinese Chemical Letters 1994年第12期5卷 1003-1004页

作者： jian min MAO jian ZHANG Hong ming CHEN Meng Shen CAI (School of Pharmaceutical Sciences, Beijing Medical University, Beijing 100083)

The key intermediate (7) to clemochinenoside-A (l), (2,6-dimethosyl-4-ethoxylcatonyl)phenyl 6-O-acety 1-2, 3,4-O-benzy 1-β-D-gluecopyranoside has been stereoselectively synthesised in high yield.

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Relationship between Waist Circumference and Elevation of Carotid Intima-media Thickness in Newly-diagnosed Diabetic Patients

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Biomedical and Environmental Sciences 2014年第5期27卷 335-342页

作者： ZHANG Lei SHEN Yun ZHOU jian PAN Jie min YU Hao Yong CHEN Hai Bing LI Qing LI ming BAO Yu Qian JIA Wei Ping Department of Endocrinology and Metabolism Sixth People’s Hospital Affiliated to Shanghai Jiao Tong University Shanghai Clinical Center for Diabetes Shanghai Diabetes Institute Shanghai Key Laboratory of Diabetes Mellitus

Objective Waist circumference, as a brief indicator of visceral obesity, is associated with multi-metabolic disorders and cardiovascular diseases. The present study was aimed to find out the relationship between waist circumference and carotid intima media thickness （C-IMT）, as well as the best waist circumference cutoff for identifying C-IMT elevation in Chinese male patients with newly-diagnosed diabetes. Methods Five hundred and seventy-eight patients from Department of Endocrinology and Metabolism in Shanghai Sixth People＇s Hospital affiliated to Shanghai Jiao Tong University were enrolled. Both physical examination （for measurement of waist circumference） and carotid ultrasonography （for measurement of C-IMT） were performed. Results After grouping according to the quartiles of C-IMT, the waist circumference increased across all its quartiles. The waist circumference in 3rd and 4th quartiles （90.7_＋9.8 cm and 90.8＋9.6 cm） was significant higher than in 1st and 2nd quartiles （P〈0.05）. When subjects were divided into 4 groups according to waist circumference, the C-IMT of subjects with waist circumference 90-95 cm was significant higher than that of subjects with waist circumference 85-90 cm and less than 85 cm respectively （P〈0.05）. Both spearman and partial correlation analysis showed that C-IMT was positively correlated with waist circumference （P〈0.01）. C-IMT was found significantly elevated with the increase of waist circumference. Multiple stepwise regression analysis showed that waist circumference was one of the independent risk factors of C-IMT. After an average of 2.23_＋0.85 years follow up, there was a significant elevation of C-IMT in the group with baseline waist circumference over 90 cm P〈0.05）, while no significant difference was detected in the group with baseline waist circumference less than 90 cm （P=0.27）. Logistic regression showed that baseline waist circumference over 90 cm was associated with a relative risk to C-IMT elevation of 1.132 （95%

关键词： Waist circumference Carotid intima media thickness Metabolic syndrome

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Heat treatment on phase evolution of Bi-2223 precursor powder prepared by spray pyrolysis method

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Chinese Physics B 2019年第4期28卷 332-336页

作者： Li-Jun Cui Ping-Xiang Zhang Jin-Shan Li Guo Yan Yong feng Xiang-Hong Liu jian-feng Li Xi-feng Pan Fan Yang Sheng-Nan Zhang Xiao-Bo Ma Guo-Qing Liu State Key Laboratory of Solidification Processing Northwestern Polytechnical University National Engineering Laboratory for Superconducting Materials (NELSM) Western Superconducting Technologies (WST) Co.Ltd. Superconducting Materials Center Northwest Institute for Nonferrous Metal Research

The phase evolution of Bi-2223 precursor powder prepared by spray pyrolysis method is studied with different heat treatment parameters. The results show that the reaction temperature and phase composition of precursor powder depend on heat treatment atmosphere. Phase assemblage of(Bi,Pb)-2212, AEC, CuO, and small Bi-2201 can be obtained by heat-treated in N2-0.1%O_2 atmosphere. For precursor powder, there is sufficient reaction process at 770℃, and the dimension of Bi-2212 phase increases rapidly with the increase of heat treatment temperature and time. The dimension of AEC phase also increases by extending heat treatment time. As a balance among phase assemblage, dimension of particle and adequate reaction, a reasonable precursor powder can be obtained by heat-treated at 770℃ for 12 h–16 h in N2-0.1%O_2 atmosphere. Critical current of 37-filament Bi-2223 tape is about 120 A, which confirms that these heat treatment parameters are reasonable.

关键词： Bi-2223 phase evolution heat treatment spray pyrolysis

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The evolution and functional divergence of 10 Apolipoprotein D-like genes in Nilaparvata lugens

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Insect Science 2024年第1期31卷 91-105页

作者： Jia-Bao Lu Peng-Peng Ren Qiao Li Fang He Zhong-Tian Xu Sai-Nan Wang jian-Ping Chen Jun-min Li Chuan-Xi Zhang Citrus Research Institute Southwest University/Chinese Academy of Agricultural SciencesNational Engineering Research Center for CitrusChongqingChina Technology Center of Wuhan Customs District HubeiChina Institute of Insect Science Zhejiang UniversityHangzhouChina

Apolipoprotein D(ApoD),a member of the lipocalin superfamily of proteins,is involved in lipid transport and stress *** only a single copy of the ApoD gene is found in humans and some other vertebrates,there are typically several ApoD-like genes in *** date,there have been relatively few studies that have examined the evolution and functional differentiation of ApoD-like genes in insects,particularly hemi-metabolous *** this study,we identified 10 ApoD-like genes(NlApoD1−10)with distinct spatiotemporal expression patterns in Nilaparvata lugens(BPH),which is an important pest of ***1−10 were found to be distributed on 3 chromosomes in a tandem array of NlApoD1/2,NlApoD3−5,and NlApoD7/8,and show sequence and gene structural divergence in the coding regions,indicating that multiple gene duplication events occurred during *** analysis revealed that NlApoD1−10 can be clustered into 5 clades,with NlApoD3−5 and NlApoD7/8 potentially evolving exclusively in the Delphacidae *** screening using an RNA interference approach revealed that only NlApoD2 was essential for BPH development and survival,whereas NlApoD4/5 are highly expressed in testes,and might play roles in ***,stress response analysis revealed that NlApoD3−5/9,NlApoD3−5,and NlApoD9 were up-regulated after treatment with lipopolysaccharide,H2O2,and ultraviolet-C,respectively,indicating their potential roles in stress resistance.

关键词： Apolipoprotein D BPH evolution functional divergence gene duplication NIApoD

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基于创新链的模具产业集群技术创新平台

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中国软科学 2009年第5期 179-183页

作者：屠建飞冯志敏宁波大学工学院浙江宁波315211 宁波大学海运学院浙江宁波315211

通过对模具产业集群技术创新的分析,提出了一种基于集群内企业协作的技术创新链,分析了技术创新链的结构、模型和特点,构建了以技术创新链为基础的模具产业集群技术创新公共平台,并给出了模具城技术创新平台的实例分析。

关键词：产业集群模具企业技术创新创新链

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