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Molecular and biological characterization of melon-infecting squash leaf curl China virus in China

Journal of Integrative Agriculture 2020年第2期19卷 570-577页

作者： WU hui-jie li Meng HONG Ni PENG bin GU Qin-sheng Zhengzhou Fruit Research Institute Chinese Academy of Agricultural SciencesZhengzhou 450009P.R.China Huazhong Agricultural University Wuhan 430070P.R.China School of Food and Bioengineering Zhengzhou University of Light IndustryZhengzhou 450000P.R.China

It has been reported that squash leaf curl China virus(SLCCNV)infects some Cucurbitaceae crops except for melon(Cucumis melo L.).A new disease of melon exhibiting severe leaf curl and dwarfing was observed in Hainan Province of *** this study,the pathogen was identified as SLCCNV through biological and molecular *** isolate(SLCCNV-HN)possess a bipartite genome,DNA-A(HM566112.1)with the highest nucleotide identity(99%)to SLCCNV-Hn(MF062251.1)pumpkin and SLCCNV-Hn61(AM260205.1)squash isolates from China,whereas DNA-B(HM566113.1)with the highest nucleotide identity(99%)to SLCCNV-Hn(MF062252.1).Phylogenetic analyses based on the full-length SLCCNV-HN DNA-A and-B sequences indicated that SLCCNV-HN melon isolate is clustered with SLCCNV-Hn pumpkin,SLCCNV-Hn61 and SLCCNV-SY squash isolates from southern China,forming an independent *** clone of SLCCNV-HN was constructed and the melon plants were inoculated and the infection rate is 100%,the systemic symptoms in melon showed identical to those of melon plants infected in ***,melon plants transmission of this virus by Bemisia tabaci with a transmission rate of 95%(19/20)showed leaf curl and dwarf symptoms 15 days post transmission,thereby fulfilling Koch’s *** of genomic organization and phylogenetic trees indicated that SLCCNV-HN melon isolate belongs to the Begomovirus *** the best of our knowledge,this is the first characterization of meloninfecting SLCCNV through its genome,infectious clone and transmission.

关键词： melon squash leaf curl China virus(SLCCNV) genome infectious clone

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Enhanced magnetic properties of Ce_(17)Fe_(76.5)Co_1Zr_(0.5)B_6 alloys by magnetic field heat treatment

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Journal of Rare Earths 2023年第9期41卷 1360-1366,I0003页

作者： Yong Yang bin li Mengya Chen Zhongyuan Wu Ruiyi Zheng Xiaohua Tan hui Xu Institute of Materials Science School of Materials Science and EngineeringShanghai UniversityShanghai 200072China

In the present work,Ce_(17)Fe_(76.5)Co_1Zr_(0.5)B_6 ribbons were prepared by a direct melt spinning *** effects of chamber pressure and magnetic field annealing temperature on the magnetic properties and microstructures of the alloys were *** grain size and content of Ce_(2)Fe_(14)B phase can be changed by adjusting the chamber pressure,and the optimal magnetic performance is obtained at0.04 *** magnetic properties can be influenced under magnetic field heat *** the annealing temperature is lower than the Curie temperature,the refinement and a uniform distribution of the grains is *** irreversible magnetic susceptibility curve reveals that magnetic field heat treatment enhances the exchange coupling interaction between grains of the Ce_(2)Fe_(14)B *** the magnetic field annealing temperature is 438 K,the alloy displays the optimal magnetic *** with the as-spun sample,the values of intrinsic coercivity(H_(ci)),remanence(B_r) and maximum energy product((BH)max) increase by 3.4%,9.8% and 18.7%,*** work provides an effective approach by which to enhance the magnetic properties of Ce-Fe-B alloys.

关键词： Ce-Fe-B Magnetic properties Microstructure Magnetic field heat treatment Rare earths

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Synergistic extraction of zinc from ammoniacal solutions using a β-diketone mixed with trialkylphosphine oxide

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Rare Metals 2019年第3期38卷 270-276页

作者： Ru-Long Zhu Xin-bin li Chang Wei hui Huang Min-Ting li Cun-Xiong li Fu-li Tang Faculty of Metallurgy and Energy Engineering Kunming University of Science and Technology Yunnan Yuntong Zinc Co. Ltd

A simple comparative study of synergistic extraction of zinc from ammonium sulfate and ammonium chloride systems with mixtures of Mextral54-100 and tri-nalkylphosphine oxide(TRPO) dissolved in n-heptane was described. Various parameters affecting the extraction process were investigated. Experimental results show that extraction from ammonium sulfate is better than that from ammonium chloride under the same conditions owing to the additional complexation between zinc and chloride ions. Total ammonium concentration and pH have a significant effect on zinc extraction efficiency because of the formation of zinc ammine complexes. The synergistic effect is explained by the formation of adduct between zinc chelates and trialkylphosphine oxide. The thermodynamic data show that the extraction reaction is exothermic and stripping is endothermic. Infrared(IR) spectra of the zincloaded organic phases were also examined.

关键词： Synergistic extraction Zinc Ammonium sulfate Ammonium chloride Mextral54-100 Trialkylphosphine oxide

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Promotion effect of sulfur impurity in alumina support on propane dehydrogenation

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Journal of Energy Chemistry 2022年第7期31卷 332-339,I0009页

作者： Xin-Qian Gao Wen-Cui li bin Qiu Jian Sheng Fan Wu An-hui Lu State Key Laboratory of Fine Chemicals School of Chemical EngineeringDalian University of TechnologyDalian 116024LiaoningChina

Alumina materials are widely applied either as a catalyst or support in various industrial catalytic processes. Impurities in alumina that are unfriendly to catalytic performance are inevitably present during the production processes. Facing this problem, we here report that the use of sulfur-containing alumina as the support can generate active alumina-supported platinum catalyst, which exhibits superior propylene selectivity and anti-coking ability during propane dehydrogenation. It demonstrated that the sulfur impurity in alumina is not entirely detrimental. During the reduction process, the formation of gas-phase sulfur species increased the electrons and poisoned unsaturated sites of platinum particles. The sulfur impurity in alumina can be removed through a hydrogen reduction process, and the degree of desulfurization is correlated with the operating temperature. This study demonstrated that the rational use of impurity will contribute to the design of a catalyst with high reactivity for potential applications.

关键词： Alumina Impurity Sulfur Platinum Propane dehydrogenation

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Determination of atmospheric hydroxyl radical by HPLC coupled with electrochemical detection

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Journal of Environmental Sciences 2008年第1期20卷 28-32页

作者： liU bin WANG hui-xiang College of Environmental Sciences Peking University Beijing 100871 China

The hydroxyl radical （·OH） plays a central role in the oxidation and removal of many atmospheric compounds. Measurement of atmospheric ·OH is very difficult because of its high reactivity and low atmospheric abundance. In this article, a simple and highly sensitive method, high performance liquid chromatography coupled with coulometric detection （HPLC-CD）, was developed to determine ·OH indirectly by determining its reaction products with salicylic acid （SAL）, 2,3-dihydroxybenzoic acid （2,3-DHBA）, and 2,5-dihydroxybenzoic acid （2,5-DHBA）. Under the optimum conditions for its determination, 2,3-DHBA and 2,5-DHBA could be well separated and the detection limits for 2,3-DHBA were 3 ×10^-10 mol/L and for 2,5-DHBA were 1.5 ×10^-10 mol/L, which were lower than most previous reports. This method was also applied to measure atmospheric hydroxyl radical levels and demonstrated the feasibility in clean and polluted air.

关键词： electrochemical detection HPLC hydroxyl radical troposphere

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Design of trotting controller for the position-controlled quadruped robot

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High Technology Letters 2016年第3期22卷 321-333页

作者：张国腾 liu Jinchang Rong Xuewen li Yibin Chai hui li bin Zhang hui Zhang Shuaishuai School of Control Science and Engineering Shandong University High Technology Research Development Center Ministry of Science and Technology of the People's Republic of China

This work presents a controller designed for position-controlled quadrupedal dynamic locomotion,aiming at simple and robust trotting control. The controller takes the torso attitude angles and velocities into planning foot trajectories. Firstly design of the servo motor actuated quadruped robot is introduced and the kinematic equations are deduced. Then a scheme is presented for controlling the robot torso attitude based on the virtual leg model. Furthermore,it demonstrates the design of the controller which enables the robot to have a wide range of trotting gaits and omni-directional motions. Finally,results of robust trotting in various speeds,path tracking and push recovery in simulation are reported,and results of trotting on real quadruped robots will be studied.

关键词： quadruped robot position control torso attitude foot trajectory trotting locomotion

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Ilmenite Smelted by Oxygen-Enriched Top-Blown Smelting Reduction

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Journal of Iron and Steel Research International 2011年第2期18卷 7-13页

作者： li hui-bin WANG Hua QI Yi-long HU Jian-hang li You-ling Engineering Research Center of Metallurgical Energy Conservation and Emission Reduction of Ministry of Education Kunming University of Science and Technology Kunming 650093 Yunnan China Kunming Iron and Steel Co Ltd Anning 650302 Yunnan China

Total ilmenite from Yunnan, China, difficult to smelt in blast furnace, was smelted by oxygen-enriched top-blown smelting reduction ironmaking technology. Much more details on smelting were discussed. Specifically, the influence of reduction temperature, slag basicity and molar ratio of carbon to oxygen on the reduction quality level including iron recovery and titanium and sulfur contents in the pig iron produced in the experiment was investigated. Iron recovery rate could reach 95 % with titanium content below 0.05 % in pig iron produced, under the conditions of holding time of 30 min at 1 823 K, basicity of 1.1, carbon to oxygen molar ratio of 1.0 and oxygen enriched flow rate of 250 L/h. Oxidization potential of top-space of smelting reduction vessel and slag combination could create the driv ing force to partition phosphorous, titanium and silicon into the slag, which ensured low contents of the impurities involved above and carbon in pig iron. In addition, it avoided the generation of Ti（C,N） that could reduce interracial tension of slag, which induced the formation of foaming slag seriously. Furthermore, jam of chargings and bubble flooding would be triggered, resulting in deterioration of BF state, increase of iron loss and decline of desulfurization rate.

关键词： smelting reduction ilmenite iron recovery desulfurization

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The　synthetical　elastic　characteristic　parameters　of　earth　tide　and　its　abnormal　precursor　evolution

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Acta Seismologica Sinica(English Edition) 1998年第4期11卷 449-454页

作者： Yan-bin Zhang (1) Jun Jiang (1) Xu-Dong li (1) hui li (1) 1. Institute of Seismology China Seismological Bureau 430071 Wuhan China

ＴｈｅｓｙｎｔｈｅｔｉｃａｌｅｌａｓｔｉｃｃｈａｒａｃｔｅｒｉｓｔｉｃｐａｒａｍｅｔｅｒｓｏｆｅａｒｔｈｔｉｄｅａｎｄｉｔｓａｂｎｏｒｍａｌｐｒｅｃｕｒｓｏｒｅｖｏｌｕｔｉｏｎＹＡＮ－ＢＩＮＺＨＡＮＧ（张雁滨）ＪＵＮ... 详细信息

ＴｈｅｓｙｎｔｈｅｔｉｃａｌｅｌａｓｔｉｃｃｈａｒａｃｔｅｒｉｓｔｉｃｐａｒａｍｅｔｅｒｓｏｆｅａｒｔｈｔｉｄｅａｎｄｉｔｓａｂｎｏｒｍａｌｐｒｅｃｕｒｓｏｒｅｖｏｌｕｔｉｏｎＹＡＮ－ＢＩＮＺＨＡＮＧ（张雁滨）ＪＵＮＪＩＡＮＧ（蒋骏）ＸＵ－ＤＯＮＧＬ...

关键词： tide observation physical synthesis Love number anomalous evolution

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Comparative study of neuropeptide signaling systems in Hemiptera

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Insect Science 2023年第3期30卷 705-724页

作者： Han Gao Yanxiao li hui Zhang Suisui Wang Fan Feng Jing Tang bin li Jiangsu Key Laboratory for Biodiversity and Biotechnology College of Life SciencesNanjing Normal UniversityNanjingChina

Numerous physiological processes in insects are tightly regulated by neuropeptides and their *** they form an ancient signaling system,there is still a great deal of variety in neuropeptides and their receptors among different species within the same *** and their receptors have been documented in many hemipteran insects,but the differences among them have been poorly *** grapevines worldwide are plagued by the bug Daktulosphaira vitifoliae(Hemiptera:Sternorrhyncha).Here,33 neuropeptide precursors and 48 putative neuropeptide G protein-coupled receptor(GPCR)genes were identified in *** expression profiles at the probe and feeding stages reflected potential regulatory roles in probe *** comparison,we found that the Releasing Hormone-Related Peptides(GnRHs)system of Sternorrhyncha was differentiated from those of the other 2 suborders in *** secondary losses of the adipokinetic hormone/corazoninrelated peptide receptor(ACP)and corazonin(CRZ)occurred during the evolution of ***,we discovered that the neuropeptide signaling systems of Sternorrhyncha were very different from those of Heteroptera and Auchenorrhyncha,which was consistent with Sternorrhyncha's phylogenetic position at the base of the *** research provides more knowledge on neuropeptide systems and sets the groundwork for the creation of novel *** management strategies that specifically target these signaling pathways.

关键词： D.vitifoliae GPCR Hemiptera neuropeptide

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Experimental study on shear behavior of prestressed reactive powder concrete I-girders

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Frontiers of Structural and Civil Engineering 2019年第3期13卷 618-627页

作者： hui ZHENG Zhi FANG bin CHEN College of Civil Engineering Hunan University of TechnologyZhuzhou 412007China College of Civil Engineering Hunan UniversityChangsha 410082China

As a new generation of concrete,RPC(Reactive Powder Concrete)has attracted great research attention for its ultra-high strength and high *** the present paper,experimental results from tests on eight prestressed RPC I-section girders failing in shear are reported *** beams with RPC of 120 MPa in compression were designed to assess the ability to carry shear stress in thin webbed prestressed beams with *** test variables were the level of prestressing,shear span-depth ratio(a/d)and stirrup *** deformation,shear capacity and crack pattern were experimentally investigated in *** regard to the shear resistance of the test beams,the predictions from three standards(AFGC,JSCE and SIA)on the design of UHPC structures were compared with the experimental result suggesting that the experimental strength is almost always higher than ***,as a new concrete,was different from normal concrete and fiber reinforced *** study should be needed to develop an analytical method and computation model for shear strength of RPC beams.

关键词： prestressed concrete RPC(Reactive Powder Concrete) concrete beams shear strength experimental study

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