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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

End-Permian conodont fauna from Dongpan section:Correlation between the deep-and shallow-water facies

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Science China Earth Sciences 2008年第11期51卷 1611-1622页

作者： GenMing luo (1) (2) XuLong lai (1) (2) Qinglai Feng (1) (3) HaiShui Jiang (1) (2) Paul Wignall (4) KeXin zhang (1) (3) YaDong Sun (2) Jun wu (1) (2) School of Earth and Environment University of Leeds LS2 9JT Leeds UK

This paper systematically investigated the conodonts from the uppermost Permian to the Lower Triassic at the Dongpan Section, Southern Guangxi, South China, and obtained abundant Late Permian conodonts from the syndepositional limestone lenses of beds 3 and 5-2 at this section. One genus and eight species of conodont P1 element including one new species, Neogondolella dongpanensis sp. nov., have been identified. The feature of conodont fauna indicates that conodonts collected from beds 3 and 5 at the Dongpan Section belong to the Neogondolella yini conodont zone, and correspond to bed 24 at the Meishan Section. Based on these conodont data, we suggest that the Neoalbaillella optima radiolarian zone at the Dongpan Section at least extended to the upper part of the N. yini conodont zone.

关键词： Dongpan Section end-Permian conodont fauna biostratigraphic correlation

Rice GTPase OsRacB:Potential Accessory Factor in Plant Salt-stress Signaling

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Acta Biochimica et Biophysica Sinica 2006年第6期38卷 393-402页

作者： Min luo~(1,2),Su-Hai GU~1,Shu-Hui ZHAO~1,Fang zhang~1,and Nai-Hu wu~(1*) ~1 Institute of Genetics and Developmental Biology,Chinese Academy of Sciences,Beijing 100080.China ~2 Deportment of Cell and Developmental Biology,Weill Medical College of Cornell University,New York.NY 10021.USA Institute of Genetics and Developmental Biology Chinese Academy of SciencesBeijing 100080 China Department of Cell and Developmental Biology Weill Medical College of Cornell UniversityNew York NY 10021 USA

As the sole ubiquitous signal small guanosine triphosphate-binding protein in plants,Rop geneplays an important role in plant growth and *** this study,we focus on the relationship betweenthe novel rice Rop gene OsRacB and plant salt *** show that OsRacB transcription is highlyaccumulated in roots after treatment with salinity,but only slightly accumulated in stems and leaves under thesame *** analysis showed that OsRacB promoter is induced by salinity and exogenoussalicylic acid,not abscisic *** elucidate its physiological function,we generated OsRacB sense andantisense transgenic tobacco and *** proper salinity treatment,sense transgenic plants grew muchbetter than the *** suggests that overexpression of OsRacB in tobacco and rice can improve plantsalt *** under the same treatment,no difference could be observed between OsRacB antisenseplants and the *** results indicated that OsRacB is only an accessory factor in plant salt tolerance.

关键词： OsRacB rice salt tolerance promoter transgenic analysis

Improvements on radiation-hardened performance of static induction transistor

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Science China(Information Sciences) 2010年第5期53卷 1089-1096页

作者： WANG yongShun 1 , luo XianLiang 1 , LI Hairong 2 , WANG ZiTing 1 , wu rong 1 , zhang CaiZhen 2 & LI SiYuan 2 1 School of Electronic and Information Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China 2 Institute of Microelectronics, School of Physical Science and Technology, Lanzhou University, Lanzhou 730000, China School of Electronic and Information Engineering Lanzhou Jiaotong University Lanzhou China Institute of Microelectronics School of Physical Science and Technology Lanzhou University Lanzhou China

The radiation-hardened performances of static induction transistor (SIT) have been studied in depth in this paper. The effects of radiation of electron beam on the I-V characteristics, carrier distribution and potential distribution in the channel of SIT have been represented. A large number of electron-hole pairs are generated in the depletion region of reversely biased gate-channel PN junction. The radiation-generated electrons drift towards the drain region at high positive potential, while generated holes flow into gate region biased to the lowest potential. With the accumulation of holes in gate region, the gate potential is boosted, resulting in a decrease in the height of potential barrier in channel, and an increase in drain current. I-V characteristics of SIT in the presence of radiation have been theoretically derived, and compared with experimental results. With the increase in thickness of epitaxial layer, the radiation-hardened capability of SIT is continuously improved until the optimum thickness of 26 μm is reached. The optimum matching relationship among geometric, material and technological parameters has been represented to acquire excellent radiation-hardened performances of SIT.

关键词： static induction transistor radiation-resistant potential barrier electron beam radiationgenerated carriers

Cloning,Structural Organization and Chromosomal Mapping of Rat Costimulatory Molecule 4-1BBL

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Acta Biochimica et Biophysica Sinica 2005年第10期37卷 694-701页

作者： Qiu-Ming DONG~1 Li-Jie MA~2 Guang-Bo zhang~1 Ya-Fang wu~3 Jia-Yao SHEN~1 Ying CHEN~1 yong-Jing CHEN~1 Xiang-Ke PU~1 Sai-Yu HANG~1 Xue-Guang zhang~(1*) 1 Biotechnology Institute,Soochow University,Suzhou 215007,China 2 Genetics Institute,Fudan University,Shanghai 200433,China 3 First Affiliated Hospital of Soochow University,Suzhou 215006,China Biotechnology Institute Soochow UniversitySuzhou 215007 China Genetics Institute Fudan UniversityShanghai 200433 China First Affiliated Hospital of Soochow UniversitySuzhou 215006 China

4-1BBL (TNFSF9) is a member of the tumor necrosis factor (TNF) ligand superfamily,whichis expressed on some activated antigen presenting cells and B *** isolated a rat cDNA clone encodingthe rat homologue of the human 4-1BBL (GenBank accession ***259541).The deduced rat 4-IBBLprotein,consisting of 308 amino acids with a molecular weight of 33,469 Da,was a typical type Ⅱtransmembrane glycoprotein,the same as human and routine 4-IBBL.“SDAA” in the cytoplasmic domain ofrat 4-1BBL was deduced to act as the phosphorylation site for casein kinase Ⅰ(“SXXS” motif),which ispresent in the cytoplasmic domains of human and murine 4-1BBL,and all other TNF ligand family membersknown to utilize reverse *** two introns of 4-1BBL were also cloned (GenBank accession ***332409).Rat 4-IBBL is much more homologous with murine 4-1BBL than with human 4-1BBL,in bothnucleotide and amino acid *** 4-1BBL was expressed in all tested tissues:brain,lung,colon,liver,thymus,testicle,kidney,adrenal,stomach,spleen and *** chromosomal location of rat 4-1BBL wasfirst identified by bioinformatics,then by fluorescence in situ hybridization at 9q11(GenBank accessionUni Gene ***.46783).Rat,murine and human 4-1BBL genes are evolved from a common *** and characterization of the rat counterpart of human 4-1BBL will facilitate studies of the biologicalfunction of this molecule.

关键词： TNF superfamily rat 4-1BBL cloning mapping

A Remote Sensing-based Analysis on the Impact of Wenchuan Earthquake on the Core Value of World Nature Heritage Sichuan Giant Panda Sanctuary

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Journal of Mountain Science 2011年第3期8卷 458-465页

作者： YU Hu ZHAO yongtao MA Yuewei SUN Yulian zhang Hu YANG Shihong luo yong Institute of Mountain Hazards and Environment ChineseAcademy of Sciences No. 9. Section 4. South Renmin Road China Graduate University of Chinese Academy of Sciences Beijing 100049 China Sichuan World Heritage Administrative Office

In this study,we used remotely sensed data,GIS modeling,and statistical methods to evaluate the damage caused by the Wenchuan Earthquake (May 12,2008) to the giant panda (Ailuropoda melanoleuca) habitat in the World Nature Heritage Sichuan Giant Panda Sanctuary (WHSGPS) in China.A landscape ecological analysis found increases of landscape heterogeneity,complexity,and fragmentation in the giant panda habitat after the earthquake.A terrain analysis found that slope and elevation are directly associated with the distribution of the damaged *** slope and elevation increase,the size of the damaged area keeps increase until to a peak,and then starts to *** total area of the damaged vegetation in our study area is 114.26 km 2,accounting for 3.78% of the study area;30.46% of that 114.26 km 2 is located in the Core Zone of *** are 18.57km 2 of the damaged vegetation located in the identified suitable giant panda habitat,accounting for 1.75% of the total area of suitable giant panda habitats in the study *** on these findings,we conclude that the Wenchuan Earthquake does not have significant impact on the WHSGPS as a whole.

关键词： World Nature Heritage Giant Panda Sanetuaries Suitable giant panda habitat Model Wenehuan Earthquake Landscape pattern GIS RS

Waveform design and high-resolution imaging of cognitive radar based on compressive sensing

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Science China(Information Sciences) 2012年第11期55卷 2590-2603页

作者： luo Ying1,zhang Qun1,HONG Wen2 & wu Yirong2 1Telecommunication Engineering Institute,Air Force Engineering University,Xi'an 710077,China 2Institute of Electronics,Chinese Academy of Sciences,Beijing 100190,China Telecommunication Engineering Institute Air Force Engineering University Xi’an China Institute of Electronics Chinese Academy of Sciences Beijing China

We introduce the compressive sensing(CS) theory for waveform design of cognitive radar,and then propose an algorithm for the high-resolution radar signal waveform and its corresponding imaging method based on the sparse orthogonal frequency division multiplexing-linear frequency modulation(OFDM-LFM) *** first present the principle of spectrum synthesis and high-resolution imaging based on OFDM-LFM ***,we propose the spectrum-sparse waveform design criterion and the reconstruction algorithm for a highresolution range profile(HRRP) based on *** on this,we analyze in detail the relationship between the scattering characteristics of the target and the parameters of the designed signal,and we construct the feedback of the target characteristics on the ***,the "cognitive" function of radar can be achieved by adaptively adjusting the waveform with the target *** are given to validate the effectiveness of the proposed algorithm.

关键词： cognitive radar waveform design compressive sensing radar imaging

Development and Production of X120 Strip With Excellent Toughness in Shougang Steel

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Journal of Iron and Steel Research International 2011年第S1期18卷 908-914页

作者： zhang yong-qing 1,LI Ming 2,LI yong-dong 1,JIN Wei 2,ZHU Guo-sen 1,LI Yan-feng 3,TIAN Peng 3,WANG Quan-li 1,wu Xin-lang 2,WANG Xue-qiang 2 (1.Shougang Research Institute of Techonolgy,Beijing,China 2.Qian’an Iron and Steel Company of Shougang Group,Hebei Province,China 3.North China Petroleum Steel Pipe Co.,Ltd) Shougang Res Inst Techonolgy Beijing Peoples R China Qianan Iron & Steel Co Shougang Grp Qianan Hebei Province Peoples R China N China Petr Steel Pipe Co Ltd Shouguang City Shandong Peoples R China

In this paper,the product designs,mechanical properties and microstructure of ultra-high strength linepipe steel in grade X120 strip with a thickness of 16mm have been shown and analyzed *** tensile test results with different directions,including transverse,longitudinal and 30° to the rolling direction,showed that the yield strength and ultimate tensile strength reach and exceed 900MPa and 1000MPa respectively,which are far higher than requirements of X120,such as 827MPa and *** the other hand,as shown from the test results of Charpy impact tests at different temperatures from 20 ℃ to-60 ℃,the absorbed energies and fracture shear area at-60℃ are about 200J and 100% respectively,which is very exciting and *** order to clarify the strengthening mechanism and effect of X120 strip further,microstructure has been observed through *** of the metallography revealedthat the microstructure was composed of lower bainitewith a size of 1um and fine M/A *** X120 strip was formed into 1420 mm diameter spiral welded pipe in Huabei pipe *** results showed that ultra-high strength and high toughness linepipe could be achieved through reasonable alloy composition design and optimized rolling processes.

关键词： linepipe steel ultra-high strength excellent toughness ultra-fined bainite X120

Hydrogen-bonded organic framework-ionic liquid composite quasisolid electrolyte for high-performance lithium battery

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Nano Research 2025年第1期18卷 332-340页

作者： Junmei zhang Yatao wu Chenye Wang yong Liu zhirong Yang Shiyue Zhou Wenpeng Li Wenjia wu Jingtao Wang School of Chemical Engineering Zhengzhou UniversityZhengzhou 450001China

Ionic liquids(ILs)hold great promise as highperformance electrolyte material due to their unique advantages including nonvolatility,high thermal stability and high ionic ***,the IL-based electrolytes always suffer from serious ion aggregation and high viscosity at low temperatures,leading to significantly decline in ionic ***,hydrogen-bonded organic framework-ionic liquid composite quasi-solid electrolyte(high temperature treatment(HT)-HOF-IL CQSE)was prepared through confining the IL electrolytes(ILEs)into the pore of HOF lamellar *** weak hydrogen bonding interactions within HOF nanosheets,together with the generated interactions between ILE and HOF,enable uniform and continuous distribution of ILE in HOF lamellar *** effectively inhibits the ion migration of ILE,which meanwhile serves as Li+transfer sites,affording high ionic conductivity of 5.7×10^(-5)S·cm-1 at-60 ℃,with high lithium-ion transference number of 0.69,whereas ILEs usually lose ionic conduction ability at such low *** assembled Li symmetrical cell can stably cycle at 0.2 mA·cm^(-2)and^(-2)0 ℃ for more than 1500 *** LiFePO_(4)|HT-HOF-IL CQSE|Li cell shows excellent cycling performance at 0.5 C at a wide temperature range of^(-2)0 to 60 ℃.This work may pave a new avenue for the development of high-performance IL-based composite electrolytes.

关键词： ionic liquid hydrogen-bonded organic framework low-temperature ionic conductivity lithium-ion transference number quasi-solid electrolyte