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A potential giant gallium deposit hosted in the tailing dam of the Fankou Zn-Pb deposit in northern guangdong Province, South China

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China geology 2024年第1期7卷 157-160页

作者： Peng-peng Yu Zhao-bin Hu Yi Zheng Lan-xuan guo Shi-yuan Ouyang gui-qiang Yuan Shang-zhou chen cheng-ming Wang Xi chen School of Earth Sciences and geological Engineering Sun Yat-sen UniversityGuangzhou 510275China guangdong Provincial Key Lab of geological Process and Mineral Resources Survey Sun Yat-sen UniversityGuangzhou 510275China Southern Marine Science and Engineering guangdong Laboratory(Zhuhai) Zhuhai 519000China Zhongjin Lingnan Nonfemet Co. LtdShenzhen 518000China

*** The Fankou giant zinc(Zn)-lead(Pb)deposit in guangdong Province is well-known for its huge reserves of over 10 Mt(million ton)Zn+Pb metals and high ore-grade with Zn+Pb exceeding 15%(guangdong Fankou Deposit Investigation group,1980;Zhu XY et al.,2017).After 60 years of exploration and exploitation,the deposit has accumulated millions of tons of *** interesting question is that what components are hosted in these tailings,and whether some key and critical metals such as gallium and germanium are extremely enriched and worth further comprehensive *** motivated us to conduct an integrated set of field investigation,sampling,major-trace element analyses and reserve assessments about the Fankou *** this contribution,we discover that the tailings contain a variety of metal elements such as zinc,lead and gallium with comprehensive utilization *** data can act as a scientific guidance for further exploration and utilization of the Fankou tailings,and aid to enhance the utilization efficiency of the key mineral resource in *** study also provide demonstration for future green mine construction in China.

关键词： deposit comprehensive guangdong

Experimental study on geosynthetic-reinforced sand fill over marine clay with or without deep cement mixed soil columns under different loadings

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Underground Space 2019年第4期4卷 340-347页

作者： Pei-chen Wu Jian-Hua Yin Wei-qiang Feng Wen-Bo chen Department of Civil and Environmental Engineering The Hong Kong Polytechnic UniversityHong KongChina

geosynthetics and deep cement mixed(DCM)soil columns have been widely used to improve soft soil grounds in many countries and *** paper presents an experimental study on a geosynthetic-reinforced sand fill over marine clay with or without DCM columns under different *** tests were conducted on the sand fill reinforced with fixed-end and free-end geosynthetics over marine clay under three-stage local loading to investigate the effects of the boundary conditions of geosynthetic reinforcement on reducing *** is observed that the fixed-end geosynthetic sheet is more effective in reducing settlements than the free-end condition under identical local *** test was conducted on the fixed-end geosynthetic-reinforced sand fill over the marine clay improved by DCM columns under single-stage uniform *** vertical stresses on the marine clay and on the DCM columns,as well as the tensile strains of the geosynthetic sheet in the overlying sand fill,were *** results revealed that the stress concentration ratio increases with an increase in consolidation settlements,and the maximum tensile strain of the geosynthetic sheet occurs near the edge rather than at the center of the top surface of the DCM columns.

关键词： Settlement geosynthetic Reinforcement Deep cement mixed soil columns

Neuronal architecture and functional mapping of the taste center of larval Helicoverpa armigera(Lepidoptera:Noctuidae)

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Insect Science 2022年第3期29卷 730-748页

作者： Long-Long Sun Xiao-Lan Liu Ya-Nan Wang Bente g.Berg gui-Ying Xie Wen-Bo chen Yang Liu gui-Rong Wang Xin-cheng Zhao Qing-Bo Tang Department of Entomology College of Plant ProtectionHenan Agricultural UniversityZhengzhou450002China Chemosensory laboratory Department of PsychologyNorwegian University of Science and TechnologyTrondheim7489Norway State Key Laboratory for Biology of Plant Disease and Insect Pests Institute of Plant ProtectionChinese Academy of Agricultural SciencesBeijing100193China

The sense of taste plays a crucial role in herbivorous insects by discriminating nutrients from complex plant metabolic *** peripheral coding of taste has been thoroughly studied in many insect species,but the central gustatory pathways are poorly *** the present study,we characterized single neurons in the gnathal ganglion of Helicoverpa armigera larvae using the intracellular recording/staining *** identified different types of neurons,including sensory neurons,interneurons,and motor *** morphologies of these neurons were largely diverse and their arborizations seemingly covered the whole gnathal *** representation of the single neurons responding to the relevant stimuli of sweet and bitter cues showed no distinct patterns in the gnathal *** postulate that taste signals may be processed in a manner consistent with the principle of population coding in the gnathal ganglion of *** larvae.

关键词： gnathal ganglion interneuron intracellular recording and staining motor neuron sensory neuron taste coding model

Construction of genetic Linkage Map Based on SSR Markers in Peanut(Arachis hypogaea L.)

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Agricultural Sciences in China 2008年第8期7卷 915-921页

作者： HONg Yan-bin LIANg Xuan-qiang.chen Xiao-ping LIU Hai-yan ZHOU gui-yuan LI Shao-xiong WEN Shi-jie Crops Research Institute Guangdong Academy of Agricultural Sciences Guangzhou 510640 P.R.China

Molecular genetic maps of crop species can be used in a variety of ways in breeding and genomic research such as identification and mapping of genes and quantitative trait loci （QTLs） for morphological, physiological and economic traits of crop species. However, a comprehensive genetic linkage map for cultivated peanut has not yet been developed due to the extremely low frequency of DNA polymorphism in cultivated peanut. In this study, 142 recombinant inbred lines （RILs） derived from a cross between Yueyou 13 and Zhenzhuhei were used as mapping population in peanut （Arachis hypogaea L.）. A total 652 pairs of genomic-SSR primer and 392 pairs of EST-SSR primer were used to detect the polymorphisms between the two parents. 141 SSR primer pairs, 127 genomic-SSR and 14 EST-SSR ones, which can be used to detect polymorphisms between the two parents, were selected to analyze the RILs population. Thus, a linkage genetic map which consists of 131 SSR loci in 20 linkage groups, with a coverage of 679 cM and an average of 6.12 cM of inter-maker distance was constructed. The putative functions of 12 EST-SSR markers located on the map were analyzed. Eleven showed homology to gene sequences deposited in genBank. This is the first report of construction of a comprehensive genetic map with SSR markers in peanut （Arachis hypogaea L.）. The map presented here will provide a genetic framework for mapping the qualitative and quantitative trait in peanut.

关键词： peanut (Arachis hypogaea L.) SSR genetic linkage map

In situ formed three-dimensional (3D) lithium-boron(Li-B) alloy as a potential anode for next-generation lithium batteries

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Rare Metals 2021年第12期40卷 3494-3500页

作者： Hai-Feng Huang Yi-Na gui Fu Sun Zhi-Jian Liu Hui-Long Ning.chen Wu Li-Bao chen State Key Laboratory of Powder Metallurgy Central South UniversityChangsha 410083China Institute of Bioenergy and Bioprocess Technology Chinese Academy of SciencesQingdao 266101China

The practical application of the lithium anode in lithium metal batteries(LMBs) has been hindered by the uncontrollable growth of lithium dendrite and the high volumetric change during cycling. Herein, the in situ formed three-dimensional(3D) lithium-boron(Li-B) alloy is suggested as an excellent alternative to the Li metal, in which the 3D Li B skeleton can mitigate the growth of Li dendrites and volumetric change. In this study, the Li-B alloy anodes with different B contents were manufactured by high-temperature melting. It was found that the boron content had a significant effect on the electrochemical performance of the Li-B alloy. The Li-B alloy with the least B content(10 wt%, 10LiB) demonstrated the lowest overpotential of 0.0852 V after 300 h and the lowest interface resistance. However, the full cell with 15LiB as the anode displayed the best cycling performance of 115 m Ah·g^(-1) after 100 cycles with a columbic efficiency greater than 97%. The obtained results suggest that the in situ formed three-dimensional Li-B alloy anode can be an excellent alternative to the Li anode via tuning B contents for next-generation high energy density LMBs.

关键词： Li-B alloy 3D skeleton Solid electrolyte interface(SEI) Anode Lithium metal battery

Synthesis and Crystal Structure of 1-[(1-Phenyl-4-cyano)pyrazol-5-yliminomethyl]-2-nitroiminoimidazolidine

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Chinese Journal of Structural Chemistry 2000年第4期19卷 259-262页

作者： chen Wei qiang WEN Lin Hong JIN gui Yu ② (Institute of Elemento organic Chemistry, State Key Laboratory of Elemento organic Chemistry, Nankai University , Tianjin, 300071) 南开大学元素有机化学国家重点实验室天津 30 0 0 71

The title compound 1 [(1 Phenyl 4 cyano)pyrazol 5 yliminomethyl] 2 nitroiminoimidazolidine 2 (C 14H 14N 8O 2, M r =326.33) was obtained by the reaction of (1 Phenyl 4 cyano)pyrazol 5 yliminomethyl ethylether with 2 nitroiminoimidazoli dine in the presence of sodium hydride. The crystal is monoclinic, space group P2 1/n, with unit cell constants a =7.310(1), b =17.218(2), c =11.669(1) , β=92.552(2)°, Z=4, V=1467.2(3)  3, D c =1.477g/cm 3, F(000)=680, μ(MoKα) =0 107 mm -1, R=0.0506, wR= 0.1398 for 2593 observed reflections( I>2σ(I )). In this compound the nitroimino group is coplanar with the imidazolidine ring and pyrazole ring plane; shorter C-N bond lengths and longer exocyclo C=N bond length were observed, suggesting a formation of a fully delocalized system. The dihedral angles between the plane formed by the O(1), O(2), N(1), N(2), C(1), N(4), C(4), N(5), C(5), N(6), N(7), C(7), C(6) atoms and phenyl ring is 48.5°. The interatomic distance for N(4)-N(6) is 4.61 . The intermolecular hydrogen bonding N(3)-H…N(8) is observed.

关键词： crystal structure neonicotinoid insectide 1 [(1 Phenyl 4 cyano)pyrazol 5 yl iminomethyl] 2 nitroiminoimidazolidine synthesis

High performance of HNaV_(6)O_(16)·4H2_(O) nanobelts for aqueous zinc-ion batteries with in-situ phase transformation by Zn(CF_(3)SO_(3))_(2) electrolyte

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Rare Metals 2022年第2期41卷 448-456页

作者： Chao guan Fang Hu Xin Yu Hai-Lian chen gui-Hong Song Kai Zhu School of Materials Science and Engineering Shenyang University of TechnologyShenyang 110870China 202 Plant Shandong Xinhua Pharmaceutical CO.LTD.Zibo 255005China Key Laboratory of Superlight Materials and Surface Technology of Ministry of Education College of Materials Science and Chemical EngineeringHarbin Engineering UniversityHarbin 150010China

Zn(CF_(3)SO_(3))_(2)as an electrolyte has been widely used to improve the electrochemical performance for ZIBs due to that the bulky CF_(3)SO_(3)-can reduce the solvation effect of Zn^(2+)and promote the ionic ***,we found that Zn(CF_(3)SO_(3))_(2)electrolyte can induce different electrochemical mechanisms from ZnSO_(4)*** to the ZnSO^(4)electrolyte,the HNaV_(6)O_(16)·4H2_(O)electrode with Zn(CF_(3)SO_(3))_(2)electrolyte exhibits a high capacity of 444 mAh·g^(-1)at 500 mA·g^(-1)with a capacity retention of 92.3%after 80 ***,at a high rate of 5 Ag-1,the HNaV_(6)O_(16)·4H_(2)O electrode delivers an initial discharge capacity of 328 mAh·g^(-1)with a capacity retention of 93.7%after 1000 *** from the mechanism with ZnSO4 electrolyte,the excellent cycle stability of HNaV_(6)O_(16)·4H_(2)Oelectrode can be attributed to the in-situ phase transformation to ZnxV_(2)O_(5)·nH_(2)O based on the co-intercalation of Zn^(2+)/H^(+).

关键词： HNaV_(6)O_(16)·4H2_(O) Zinc-ion batteries Zn(CF_(3)SO_(3))_(2) ZnSO_(4) Electrolyte

Chloromethylation and Quaternization of Poly(aryl ether ketone sulfone)s with Clustered Electron-rich Phenyl groups for Anion Exchange Membranes

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Chinese Journal of Polymer Science 2020年第3期38卷 278-287,I0007页

作者： Lei Xiong Yuan-Fang Hu Zi-gui Zheng Zai-Lai Xie Dong-Yang.chen College of Materials Science and Engineering Fuzhou UniversityFuzhou 350116China College of Chemistry Fuzhou UniversityFuzhou 350176China

Ion segregation is critically important for achieving high ion conductivity for anion exchange membranes(AEMs).Herein,a new bisphenol monomer bearing ten electron-rich phenyl groups was designed and polymerized with various amounts of electron-deficient 4,4′-dihydroxydiphenylsulfone and 4,4′-difluorobenzophenone to yield dense and selective reaction sites for chloromethylation and *** the most challenging step,chloromethylation was optimized by tuning the reaction temperature,reaction time,and reactant *** exchange capacity,water uptake,anion conductivity,mechanical stability,and alkaline stability of the resulting AEMs were characterized in *** is found that chloromethylation reaction needed to be carried out at low equivalent of chloromethylation agents to avoid undesirable *** QA-PAEKS-20 sample with an IEC of 1.19 mmol·g^-1 exhibited a Cl^–conductivity of 11.2 mS·cm^-1 and a water uptake of 30.2%at80°C,which are promising for AEM applications.

关键词： Anion exchange membrane Chloromethylation Poly(aryl ether) Ion-segregation Anion conductivity

CLASSIFICATION OF BIFURCATIONS FOR NONLINEAR DYNAMICAL PROBLEMS WITH CONSTRAINTS

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Applied Mathematics and Mechanics(English Edition) 2002年第5期23卷 535-541页

作者： WU Zhi-qiang(吴志强) chen Yu-shu(陈予恕) Department of Mechanics Tianjin University Tianjin 300072 P R China Department of Mechanics Tianjin University Tianjin 300072 P R China

Bifurcation of periodic solutions widely existed in nonlinear dynamical systems is a kind oftonstrained one in intrinsic quality because its amplitude is always non-negative Classification of the bifurcations with the type of constraint was discussed. All its six types of transition sets are derived, in which three types are newly found and a method is proposed for analyzing the constrained bifurcation.

关键词： constraint bifurcation singularity nonlinear dynamical problem