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Effect of water-driven changes in rice rhizosphere on Cd lability in three soils with different pH

Journal of Environmental Sciences 2020年第1期32卷 82-92页

作者： Jinjin Wang dongqin li Qin Lu Yulong Zhang Huijuan Xu Xueli Wang Yongtao li College of Natural Resources and Environment joint Institute for Environmental Research&Education South China Agricultural UniversityGuangzhou 510642China life Science and Technology School Lingnan Normal UniversityZhanjiang 524048China College of Agriculture Guangxi UniversityNanning 530004China

Pot experiments were conducted to evaluate the effect of water management,namely continuous flooding(CF),intermittent flooding(IF)and non-flooding(NF),on Cd phytoavailaility in three paddy soils that differed in p H and in Cd *** gradients in thin films(DGT)technique was employed to monitor soil labile Cd and Fe concentrations simultaneously at three growth stages(tillering,heading and mature stage)of *** Cd phytoavailability were generally in the order of NF>IF>CF,and higher rice Cd(over permitted level,0.2 mg/kg)were only found in neutral and acidic soils under NF *** measured soil labile Cd rather than total Cd was the most reliable predictor for Cd accumulation in *** enhanced the formation of root plaques,which related to oxidation of large quantities of available Fe on root surfaces due to the O2 secretion of rice *** Cd concentration in root plaques shared the same trend with ***,root plaques would inhibit Cd uptake by rice under CF conditions,while under IF and NF conditions,root plaques act as a temporarily store of Cd,and soil labile Cd is the key factor that controls the transfer of Cd from soil to *** results of principle component analysis revealed that water management had the greatest effect on soil Cd lability and rice Cd in acidic ***,it is important to consider the availability of Cd and soil p H when assessing current agricultural practices of contaminated soil in China.

关键词： Cadmium lability Rhizosphere Rice Water management Root plaque DGT technique

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Performance and bioparticle growth of anaerobic baffled reactor （ABR） fed with low-strength domestic sewage

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Frontiers of Environmental Science & Engineering 2015年第2期9卷 352-364页

作者： Jing FENG Yili WANG Xueyuan JI dongqin YUAN Hui li College of Environmental Science and Engineering Beijing Key Laboratory for Source Control Technology of Water Pollution Beijing Forestry University Beijing 100083 China

We investigated the performance of a 15.3 L capacity anaerobic baffled reactor （ABR） toward the treatment of low-strength domestic wastewater. The start- up period of the ABR was finished within approximately 130 days at a temperature below 25~C. The average CODcr in the effluent was 165 mg.L 1 and the corresponding CODcr removal efficiency of the ABR was 52.3%. During the third stage （from day 130 to day 233） of ABR operation, the average CODcr in the effluent reached 71 mg· L^-1, which meets the secondary discharge requirement of the Integrated Wastewater Discharge Standard （GB 18918-2002, China）. Moreover, partial microbial separa- tion was observed along the five ABR compartments through scanning electron microscopic images. The geometric mean diameter of bioparticles in the five compartments increased from 0.050 mm to 0.111, 0.107, 0.104, 0.110, and 0.103 mm during the start-up stage. After operation for 179days, the further increased to 0.376, corresponding diameters 0.225, 0.253, 0.239, and 0.288mm, respectively. The fractal dimensions of the bioparticles indicated that these particles have smoother surfaces and more compact structures during ABR operation. Morphological analysis of the bioparticle sections demonstrated that the bioparticles have a pore volume of 30%-55%. The highest porosity was observed for the bioparticles in the second ABR compartment, whereas the lowest fractal dimension ofbioparticle section was observed in the fifth compartment.

关键词： anaerobic baffled reactor low-strengthdomestic wastewater start-up bioparticles morphology

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Vision-based Dynamics Monitoring(VDM)for Diagnosing the Variations of Wind Turbine Tower Foundation Conditions

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Journal of Dynamics, Monitoring and Diagnostics 2024年第3期3卷 216-224页

作者： Yanling Cao Rongfeng Deng dongqin li Yang Guan Yubin lin Baoshan Huang School of Industrial Automation Beijing Institute of TechnologyZhuhaiGuangdongChina Centre for Efficiency and Performance Engineering University of HuddersfieldHuddersfieldUK School of Electrical Engineering Yanshan UniversityQingdaoHebeiChina

A slight uneven settlement of the foundation may cause the wind turbine to shake,tilt,or even collapse,so it is increasingly necessary to realize remote condition monitoring of the *** present,the wind turbine foundation monitoring system is *** current monitoring research of the tower foundation is mainly of contact measurements,using acceleration sensors and static-level sensors for monitoring multiple reference *** monitoring methods will face some disadvantages,such as the complexity of monitoring deployment,the cost of manpower,and the load effect on the tower *** solve above issues,this paper aims to investigate wind turbine tower foundation variation dynamic monitoring based on machine *** vision monitoring is a kind of noncontact measurement,which helps to realize comprehensive diagnosis of early foundation uneven settlement and loose *** FEA model is firstly investigated as the theoretical foundation to investigate the dynamics of the tower ***,the Gaussian-based vibration detection is adopted by tracking the tower edge ***,a tower structure with distributed foundation support is *** modal parameters obtained from the visual measurement are compared with those from the accelerometer,proving the vision method can effectively monitor the issues with tower foundation changes.

关键词： distributed foundation stiffness finite element analysis Gaussian fitting machine vision

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中国科技创新政策协同演变及其效果:2006—2018

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科研管理 2022年第3期43卷 1-8页

作者：李冬琴浙江理工大学经济管理学院浙江杭州310018

2006年以来伴随科技创新政策的密集推出,中国科技创新政策体系发生了影响深远的重大变化,但目前尚缺乏全面完整地针对2006年来科技创新政策的协同演变及其效果的定量研究。本文在借鉴前人政策测量方法的基础上,以2006—2018年中国科技... 详细信息

2006年以来伴随科技创新政策的密集推出,中国科技创新政策体系发生了影响深远的重大变化,但目前尚缺乏全面完整地针对2006年来科技创新政策的协同演变及其效果的定量研究。本文在借鉴前人政策测量方法的基础上,以2006—2018年中国科技创新政策为对象,对筛选出的科技创新政策进行量化分析,探索中国科技创新政策协同演变特征,并应用岭回归分析研究科技创新政策力度、协同度和可执行度与创新绩效的关系。研究发现:科技创新政策协同度自2006年始呈上升之势,总效力显著增强。科技创新政策对科技创新绩效产生正向显著影响。政策特征对科技创新绩效的影响存在差异性。越明确的政策方向指引越能促进应用型重大成果的产生,提高创新政策的协同有助于促进中国专利授权量的增长,而促进企业新产品销售收入增长则需相关创新政策在力度、协同度和可执行度三方面的结合。

关键词：科技创新政策政策演变政策协同政策效果

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创新驱动视野的供给促进与需求诱致

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改革 2016年第12期 46-54页

作者：李冬琴浙江理工大学经济管理学院浙江杭州310018

从需求角度分析我国市场供需矛盾问题形成的主要原因在于,消费者未意识到隐性需求,隐性需求未转化为显性需求,显性需求不足和供给与显性需求不一致,由此提出需求侧管理的主要内容包括隐性需求的发掘、隐性需求向显性需求的转化,显性需... 详细信息

从需求角度分析我国市场供需矛盾问题形成的主要原因在于,消费者未意识到隐性需求,隐性需求未转化为显性需求,显性需求不足和供给与显性需求不一致,由此提出需求侧管理的主要内容包括隐性需求的发掘、隐性需求向显性需求的转化,显性需求的激发和促进供给与需求的一致性,并提出我国政府实施需求侧管理应从如下方面着手:制定和实施符合民众需求的产品质量标准和严格的监督管理制度,让"中国制造"满足民众需求;鼓励需求侧与供给侧的合作研发,让需求贴近供给;建立领先市场,推动隐性需求的加速启动;催化式采购和消费者教育相结合,引导消费者需求转变;研究实施商业化前采购,以需求引领创新。

关键词：需求侧管理供给侧结构性改革创新驱动

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液质联用法测定蔬菜和水果中的烟酰胺单核苷酸

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实验技术与管理 2019年第9期36卷 57-59,72页

作者：李东芹华中农业大学作物遗传改良国家重点实验室

建立B-烟酰胺单核苷酸的液相色谱-串联质谱快速测定方法。采用Shim-packVP-ODS(150L×2.0 mm,5μm)色谱柱进行色谱分离,流动相为甲醇与0.1%乙酸水溶液,梯度洗脱12 min,流速为0.3 mL/min,在质谱正离子模式下用多反应离子监测模式进行定... 详细信息

建立B-烟酰胺单核苷酸的液相色谱-串联质谱快速测定方法。采用Shim-packVP-ODS(150L×2.0 mm,5μm)色谱柱进行色谱分离,流动相为甲醇与0.1%乙酸水溶液,梯度洗脱12 min,流速为0.3 mL/min,在质谱正离子模式下用多反应离子监测模式进行定量测定。在0.1425-228μg/L的质量浓度范围内线性良好(r=0.9998),回收率为86.6%~108%,RSD为3.4%;重现性好,RSD为2.22%;方法的定量限0.1425μg/L(S/N为10),检出限为0.07μg/L(S/N为5)。该方法灵敏度高、选择性好,适用于蔬菜、水果营养价值分析及药用价值开发研究中B-烟酰胺单核苷酸的快速测定。

关键词：烟酰胺单核苷酸西兰花卷心菜牛油果液相色谱-串联质谱

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Dynamic metabolite QTL analyses provide novel biochemical insights into kernel development and nutritional quality improvement in common wheat

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Plant Communications 2024年第5期5卷 42-56页

作者： Bo Yin Jingqi Jia Xu Sun Xin Hu Min Ao Wei liu Zhitao Tian Hongbo liu dongqin li Wenfei Tian Yuanfeng Hao Xianchun Xia Nir Sade Yariv Brotman Alisdair RFernie Jie Chen Zhonghu He Wei Chen National Key Laboratory of Crop Genetic Improvement and National Center of Plant Gene Research(Wuhan) Huazhong Agricultural UniversityWuhan 430070China Hubei Hongshan Laboratory Wuhan 430070China National Wheat Improvement Center Institute of Crop SciencesChinese Academy of Agricultural SciencesBeijingChina School of Plant Sciences and Food Security The Institute for Cereal Crops ImprovementTel Aviv UniversityTel Aviv 69978Israel Max Planck Institute of Molecular Plant Physiology 14476 Potsdam-GolmGermany Yazhouwan National Laboratory Sanya 572025China

Despite recent advances in crop metabolomics,the genetic control and molecular basis of the wheat kernel metabolome at different developmental stages remain largely ***,we performed widely tar-geted metabolite profiling of kernels from three developmental stages(grain-filling kernels[FKs],mature kernels[MKs],and germinating kernels[GKs])using a population of 159 recombinant inbred *** de-tected 625 annotated metabolites and mapped 3173,3143,and 2644 metabolite quantitative trait loci(mQTLs)in FKs,MKs,and GKs,*** 52 mQTLs were mapped at all three stages,indicating the high stage specificity of the wheat kernel *** candidate genes were functionally vali-dated by in vitro enzymatic reactions and/or transgenic approaches in wheat,three of which mediated the tricin metabolic ***ﬂux efficiencies within the tricin pathway were evaluated,and su-perior candidate haplotypes were identified,comprehensively delineating the tricin metabolism pathway in ***,additional wheat metabolic pathways were re-constructed by updating them to incorporate the 177 candidate genes identified in this *** work provides new information on variations in the wheat kernel metabolome and important molecular resources for improvement of wheat nutritional quality.

关键词： mQTL wheat kernel development gene validation nutritional quality wheat

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自主创新政策带来的科研生产率动态变化分析

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中国科技论坛 2009年第7期 43-47页

作者：李冬琴浙江理工大学经济管理学院浙江杭州310018

本文旨在研究自主创新政策给我国科研生产率带来的影响,用Malmquist指数法测算了2000—2006年我国26个主要省份科研生产率的变动趋势,并把科研生产率的变动分解为技术进步和纯技术效率变动以及规模效率变动进行了分析。结果表明,自主创... 详细信息

本文旨在研究自主创新政策给我国科研生产率带来的影响,用Malmquist指数法测算了2000—2006年我国26个主要省份科研生产率的变动趋势,并把科研生产率的变动分解为技术进步和纯技术效率变动以及规模效率变动进行了分析。结果表明,自主创新政策推出后我国科研生产率短期内有所下降。

关键词：自主创新科技生产率 Malmquist指数

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Multi-omics analyses of 398 foxtail millet accessions reveal genomic regions associated with domestication,metabolite traits,and antiinflammatory effects

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Molecular Plant 2022年第8期15卷 1367-1383页

作者： Xukai li Jianhua Gao Jingyi Song Kai Guo Siyu Hou Xingchun Wang Qiang He Yanyan Zhang Yakun Zhang Yulu Yang Jiaoyan Tang Hailang Wang Staffan Persson Mingquan Huang lishuai Xu linlin Zhong dongqin li Yongming liu Hua Wu Xianmin Diao Peng Chen Xiaowen Wang Yuanhuai Han Shanxi Key Laboratory of Minor Crop Germplasm Innovation and Molecular Breeding College of Life SciencesShanxi Agricultural UniversityTaiguChina Key Laboratory of Brewing Molecular Engineering of China light Industry Beijing Technology and Business UniversityBeijingChina Department of Neurology University of MichiganAnn ArborMIUSA Shanxi Key Laboratory of Minor Crop Germplasm Innovation and Molecular Breeding College of AgricultureShanxi Agricultural UniversityTaiguChina Institute of Crop Sciences Chinese Academy of Agricultural SciencesBeijingChina Colllege of Plant Science and Technology Huazhong Agricultural UniversityWuhanChina Copenhagen Plant Science Centre Department of Plant&Environmental SciencesUniversity of CopenhagenFrederiksberg CDenmark Joint International Research Laboratory of Metabolic and Developmental Sciences School of Life Sciences and BiotechnologyShanghai Jiao Tong UniversityMinhangShanghai 200240China College of Resources and Environment Shanxi Agricultural UniversityTaiguChina College of Horticulture and Forestry Sciences Huazhong Agricultural UniversityWuhanChina National Key Laboratory of Crop Genetic Improvement Huazhong Agricultural UniversityWuhanChina Grandomics Biosciences Company limited BeijingChina College of Food Science and Engineering Shanxi Agricultural UniversityTaiguChina

Foxtail millet(Setaria italica),which was domesticatedfromthewild speciesgreenfoxtail(Setaria viridis),isa richsource of phytonutrientsfor *** evaluate how breeding changed themetabolome offoxtail millet grains,we generated and analyzed the datasets encompassing the genomes,transcriptomes,metabolomes,and anti-inflammatory indices from 398 foxtail millet *** identified hundreds of common variants that influence numerous secondary *** observed tremendous differences in natural variations of the metabolites and their underlying genetic architectures between distinct sub-groups of foxtail ***,we found that the selection of the gene alleles associated with yellow grains led to altered profiles of metabolites such as carotenoids and endogenous *** CRiSPR-mediated genome editing wevalidated the function of PHYTOENE SYNTHASE1(PSY1)gene in affecting milletgrain colorand ***,our in vitro cell inflammation assays showed that 83 metabolites in millet grains have anti-inflammatory *** together,ourmulti-omics study illustrates how the breeding history of foxtail millet has shaped its metabolite *** datasets we generated in this study also provide important resources for further understanding how millet grain quality is affected by different metabolites,laying the foundations for future millet genetic research and metabolome-assisted improvement.

关键词： foxtail millet multi-omics,genetic association metabolome transcriptome anti-inflammatory effects

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低温氯化炉内颗粒停留时间分布研究

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钢铁钒钛 2017年第3期38卷 30-33页

作者：李冬勤攀钢集团研究院有限公司四川攀枝花617000

利用攀钢含钛高炉渣低温氯化炉冷态模型,采用电导率法对脉冲示踪粒子进行试验研究,分别考察了内部挡板、物料流量、表观气速等操作参数对低温氯化炉中颗粒停留时间分布(RTD)的影响。结果表明,挡板纵向切割流化床相对空间,消除短路,有利... 详细信息

利用攀钢含钛高炉渣低温氯化炉冷态模型,采用电导率法对脉冲示踪粒子进行试验研究,分别考察了内部挡板、物料流量、表观气速等操作参数对低温氯化炉中颗粒停留时间分布(RTD)的影响。结果表明,挡板纵向切割流化床相对空间,消除短路,有利于颗粒与流化气的充分混合,双挡板条件下,碳化渣颗粒在流化床内RTD更为集中(方差σ2t由0.67明显降低至0.5);加料速率由1.9 g/s减小至1.1 g/s,物料平均停留时间延长一倍,碳化渣反应时间增加。表观气速增大至0.15 m/s时,虽然在一定程度上弱化了碳化渣停留时间分布的集中性,但返混强化了颗粒与气体的接触和反应,保证了流化状态,有利于提高碳化渣氯化效率。

关键词：含钛高炉渣碳化渣氯化流化床停留时间脉冲法

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