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Genetic Analysis of the Resistance to Aspergillus flavus Infection in Maize (Zea mays L.)

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Agricultural Sciences in China 2009年第6期8卷 761-765页

作者： deNG de-xiang jiang Si-xia WANG Yi-jun BIAN Yun-long CHEN jian-jian JIA Bo jiangsu Province Key Laboratory of Crop Genetics and Physiology~Key Laboratory of Plant Functional Genomics Ministry of Education Yangzhou University Yangzhou 225009 P.R. China Yangzhou Environment and Resources Technical College Yangzhou 225009 P.R. China

Maize （Zea mays L.）, one of main crops in the world, is easily susceptible to Aspergillusflavus （Link： fr） infection, resulting huge loses worldwide. Breeding for A. flavus resistance has been proved an efficient way to solve the problem of aflatoxin contamination. Genetic analysis of the sources of resistance to *** in maize is necessary for this purpose. The complete diallel crosses of 6 inbred lines with different resistance to *** infection were implemented. Inoculation categorical data of each cross were analyzed with the additive-dominant and additive-dominant-epitasis genetic models. Results indicated some crosses fitted the 2 major genes with additive-dominant-epitasis genetic model. Others fitted the major gene and polygene mixed model. Moreover, the additive, dominant, and epitasis effects varied in crosses. The *** resistance was controlled by both major gene and polygene.

关键词： maize Aspergillus flavus resistance genetic model

Recovery of copper and tin from stripping tin solution by electrodeposition

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Rare Metals 2014年第3期33卷 353-357页

作者： Bin Li de-An Pan Yu-Hui jiang jian-Jun Tian Shen-Gen Zhang Kun Zhang Institute for Advanced Materials and Technology School of Materials Science and Engineering University of Science and Technology Beijing Beijing Nonferrous Metals and Rare Earth Research Institute

In this paper, the method of recycling copper and tin by constant-current and constant-voltage electrolysis from the stripping tin solution of tinned copper wastes was studied. The experimental results show that the elements could be deposited on the cathode in turn by different deposition potentials, therefore, the copper and tin were separated by constant-voltage electrolysis but not constant-current electrolysis. In this study, the influence of anode materials was also investigated. Graphite anode is stable without impurities dissolved into the stripping tin solution, while 316 stainless steel anode is dissolved into Fe2？and Fe3？as anodic corrosion, which could decrease the deposition efficiency of tin. The copper and tin in the stripping tin solution are separated orderly by electrodeposition at different voltages using the graphite anode. The recovery rate of copper is up to 100 % at 2.00 V, while that of tin is 80 % at 3.00 V.

关键词： Electrodeposition Copper Tin Stripping tinsolution

Effect of Initial Concentration on Adsorption-desorption Characteristics and desorption Hysteresis of Hexachlorobenzene in Soils

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Pedosphere 2010年第1期20卷 104-110页

作者： GAO Hong-jian jiang Xin School of Resources and Environmental Science Anhui Agricultural University Hefei 230036 (China) State Key Lab of Soil and Sustainable Agriculture Institute of Soil Science Chinese Academy of Sciences Nanjing 210008 (China)

Adsorption and desorption are important processes that influence the transport, transformation, and bioavailability of hexachlorobenzene (HCB) in soils. To examine the adsorption-desorption characteristics of HCB, equilibrium batch experiments were carried out using two soils (red soil and paddy soil) with different initial HCB concentrations (0.25, 0.50, 0.75, 1.00, 1.50, 2.50, 3.50, and 5.00 mg L-1 ) by using 0.01 mol L-1 calcium chloride as the background solution. The successive desorption experiments (48, 96, 144, 192, and 240 h) were conducted after each adsorption equilibrium experiment. The results revealed that adsorption and desorption isotherms of HCB on two soils were nonlinear, which can be best described by the Freundlich equation with the square of the correlation coefficient (r 2 ) ranging from 0.97 to 0.99. desorption of HCB from the two soils exhibited hysteresis at all HCB concentrations because the Freundlich desorption coefficients were always higher than the Freundlich adsorption coefficients. The hysteretic effect was enhanced with increasing initial HCB concentration, and positive hysteresis was observed at different concentrations.

关键词： Freundlich equation sorption coefficients sorption isotherms

Impact of oxygen supply on production of terpenoids by microorganisms: State of the art

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Chinese Journal of Chemical Engineering 2021年第2期34卷 46-53页

作者： Ting-Ting Liu Han Xiao jian-Hui Xiao jian-jiang Zhong State Key Laboratory of Microbial Metabolism Joint International Research Laboratory of Metabolic and Developmental SciencesLaboratory of Molecular Biochemical Engineering and Advanced Fermentation TechnologyDepartment of BioengineeringSchool of Life Sciences and BiotechnologyShanghai Jiao Tong UniversityShanghai 200240China Zunyi Municipal Key Laboratory of Medicinal Biotechnology Center for Translational MedicineAffiliated Hospital of Zunyi Medical UniversityZunyi 563003China

Terpenoids are a class of high value-added natural products with a variety of biological *** engineered microorganisms,such as those of Escherichia coli and Saccharomyces cerevisiae,have merits in producing plant or fungus-derived terpenoids,due to their mature genetic manipulation,simple nutrient demand and fast ***,as a key environmental factor,is particularly important to microbial metabolism and growth,and suitable oxygen supply is viewed as a prerequisite for realizing highly efficient production of terpenoids by engineered *** this article,the role of oxygen in regulating terpenoid bioproduction is overviewed from the viewpoints of cellular carbon metabolism,energy metabolism and terpenoid *** on adjusting oxygen availability to microorganisms,including genetic modification of cellular metabolism related with oxygen utilization,are summarized and discussed,to provide helpful information for further improvement of terpenoid biosynthesis by microbes.

关键词： Terpenoid Microorganisms Oxygen supply Chassis modification

A new insight into rapid oxidation of alloy 925 contaminated by oxide powder

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Rare Metals 2021年第7期40卷 1872-1880页

作者： He jiang jian-Xin Dong Mai-Cang Zhang jiang-Yang Li Materials Science and Engineering University of Science and Technology BeijingBeijing 100083China

Rapid oxidation takes place both in the laboratory and in industrial conditions when alloy 925 is contaminated by oxide powder,and the oxidation rate is much higher than ***,the rapid oxidation behavior and mechanism of alloy 925 were investigated by a series of comparison tests at 1160℃.It is found that the oxide powder produced during the oxidation process is mainly composed of NiCr_(2)O_(4)spinel,accompanied by NiO and NiMoO_(4).The oxide powder plays a triggering role in the rapid oxidation of alloy 925,as NiO has a strong affinity with O.A composition adjustment experiment of alloy 925 shows that rapid oxidation is the synergetic effect of Mo and Cu in the *** and Cu easily combine to form low melting point *** formation and volatilization of MoO_(3)oxide can destroy the completeness of the protective oxide *** MoO_(3)flux can dissolve protective Cr_(2)O_(3)and prevent the repair of the oxide layer and also promote the formation of nonprotective and easy-spall NiCr_(2)O_(4)*** synergetic effect of Cu and Mo in accelerating oxidation should be considered in any nickel-based alloy with a high content of Cu and Mo.

关键词： Rapid oxidation Synergetic effect Nickelbased superalloy

Identification and distribution of a single nucleotide polymorphism responsible for the catechin content in tea plants

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Horticulture Research 2020年第1期7卷 2395-2403页

作者： Chen-Kai jiang jian-Qiang Ma Yu-Fei Liu Jie-Dan Chen de-jiang Ni Liang Chen Key Laboratory of Tea Biology and Resources Utilization Ministry of Agriculture and Rural AffairsTea Research Institute of the Chinese Academy of Agricultural Sciences9 South Meiling RoadHangzhouZhejiang 310008China College of Horticulture and Forestry Science Huazhong Agricultural University1 Shizishan StreetHongshan DistrictWuhanHubei 430070China Tea Research Institute Yunnan Academy of Agricultural SciencesMenghaiYunnan 666201China

Catechins are the predominant products in tea plants and have essential functions for both plants and *** genes encoding the enzymes regulating catechin biosynthesis have been identified,and the identification of single nucleotide polymorphisms(SNPs)resulting in nonsynonymous mutations within these genes can be used to establish a functional link to catechin ***,the transcriptomes of two parents and four filial offspring were sequenced using next-generation sequencing technology and aligned to the reference genome to enable SNP ***,176 tea plant accessions were genotyped based on candidate SNPs using kompetitive allelespecific polymerase chain reaction(KASP).The catechin contents of these samples were characterized by highperformance liquid chromatography(HPLC),and analysis of variance(ANOVA)was subsequently performed to determine the relationship between genotypes and catechin *** a result of these efforts,a SNP within the chalcone synthase(CHS)gene was shown to be functionally associated with catechin ***,the geographical and interspecific distribution of this SNP was ***,these results will contribute to the early evaluation of tea plants and serve as a rapid tool for accelerating targeted efforts in tea breeding.

关键词： distribution content mining

Simulation of anchor chain based on lumped mass method

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Theoretical & Applied Mechanics Letters 2023年第4期13卷 311-319页

作者： Xiaobin jiang jian Gan Shiyang Teng Merchant Marine College Shanghai Maritime UniversityShanghai 201306China

In order to develop a anchoring operation simulation system and improve safety during anchoring operations,a relatively accurate mathematical model of anchoring operations needs to be *** this paper,the stress condition of anchor chain under environmental and subsea geological conditions is further studied and the stress condition of anchor chain is analyzed based on the previous *** this paper,a quasi-static model based on catenary method is used as the basis of dynamic analysis,and the dynamic model of anchor chain is established based on the concentrated mass method,which fully considers the influence of anchor chain weight,hydrodynamic force,ocean current and interaction with the *** fourth-order Runge Kutta method was used to solve the model numerically,and a calculation procedure was *** accuracy of the model was verified by comparing the calculated results with the experimental results,indicating that the constructed anchor chain dynamics model has a high accuracy.

关键词： Lump mass method Anchor chain Dynamic analysis

Global patterns of taxonomic and phylogenetic diversity of flowering plants: Biodiversity hotspots and coldspots

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Plant Diversity 2023年第3期45卷 265-271页

作者： Hong Qian jian Zhang Meichen jiang Research and Collections Center Illinois State Museum1011 East Ash StreetSpringfieldIL 62703USA Center for Global Change and Complex Ecosystems Zhejiang Tiantong Forest Ecosystem National Observation and Research StationSchool of Ecological and Environmental SciencesEast China Normal UniversityShanghai 200241China Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092China

Species diversity of angiosperms(flowering plants) varies greatly among *** patterns of variation in species diversity are shaped by the interplay of ecological and evolutionary ***,using a comprehensive data set for regional angiosperm floras across the world,we show geographic patterns of taxonomic(species) diversity,phylogenetic diversity,phylogenetic dispersion,and phylogenetic deviation(i.e.,phylogenetic diversity after accounting for taxonomic diversity) across the *** diversity is strongly and positively correlated with taxonomic diversity;as a result,geographic patterns of taxonomic and phylogenetic diversity across the world are highly *** with high taxonomic and phylogenetic diversity are located in tropical regions whereas areas with low taxonomic and phylogenetic diversity are located in temperate regions,particularly in Eurasia and North America,and in northern ***,phylogenetic dispersion is,in general,higher in tropical regions and lower in temperate ***,the geographic pattern of phylogenetic deviation differs substantially from those of taxonomic and phylogenetic diversity and phylogenetic *** a result,hotspots and coldspots of angiosperm diversity identified based on taxonomic and phylogenetic diversity and phylogenetic dispersion are incongruent with those identified based on phylogenetic *** of these metrics may be considered when selecting areas to be protected for their biodiversity.

关键词： Angiosperm Biodiversity hotspot Phylogenetic diversity Phylogenetic structure Species richness

Stability and oscillations in a slow-fast flexible joint system with transformation delay

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Acta Mechanica Sinica 2014年第5期30卷 727-738页

作者： Shan-Ying jiang jian Xu Yao Yan School of Aerospace Engineering and Applied Mechanics Tongji University

Flexible joints are usually used to transfer velocities in robot systems and may lead to delays in motion transformation due to joint flexibility. In this paper, a linkrotor structure connected by a flexible joint or shaft is firstly modeled to be a slow-fast delayed system when moment of inertia of the lightweight link is far less than that of the heavy rotor. To analyze the stability and oscillations of the slowfast system, the geometric singular perturbation method is extended, with both slow and fast manifolds expressed analytically. The stability of the slow manifold is investigated and critical boundaries are obtained to divide the stable and the unstable regions. To study effects of the transformation delay on the stability and oscillations of the link, two quantitatively different driving forces derived from the negative feedback of the link are considered. The results show that one of these two typical driving forces may drive the link to exhibit a stable state and the other kind of driving force may induce a relaxation oscillation for a very small delay. However, the link loses stability and undergoes regular periodic and bursting oscillation when the transformation delay is large. Basically, a very small delay does not affect the stability of the slow manifold but a large delay affects substantially.

关键词： Flexible joint - Slow-fast system - Transforma- tion delay Geometric singular perturbation