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粗石英砂层厚度及倾角对核废物处置库顶盖毛细屏障效应的影响

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环境污染与防治 2009年第4期31卷 11-13,27页

作者：霍丽娟杨改强杨国义何秋生李一菲赵世平钱天伟太原科技大学环境科学研究所山西太原030024

毛细屏障作为核废物处置库顶盖的工程屏障之一,已经在国内外得到了广泛应用。采用箱体实验方法,研究了非饱和稳定流条件下粗石英砂层厚度和倾角对毛细屏障效应的影响。结果表明,随着粗石英砂层厚度的增大,水分的相对绕流量增大,毛细屏... 详细信息

毛细屏障作为核废物处置库顶盖的工程屏障之一,已经在国内外得到了广泛应用。采用箱体实验方法,研究了非饱和稳定流条件下粗石英砂层厚度和倾角对毛细屏障效应的影响。结果表明,随着粗石英砂层厚度的增大,水分的相对绕流量增大,毛细屏障效应增强;随着粗石英砂层倾角的增大,其表面积水减少,水的横向流动能力增强,毛细屏障效应增强。

关键词：毛细屏障基质势绕流穿透

洞庭湖区典型稻田玉米水稻轮作下土壤—作物系统对施氮措施的响应

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中国农业科学 2024年第10期57卷 1979-1994页

作者：房康睿龙世平彭斯文陈山廖育林徐新朋赵士诚仇少君何萍周卫中国农业科学院农业资源与农业区划研究所/北方干旱半干旱耕地高效利用全国重点实验室/农业农村部植物营养与肥料重点实验室湖南省农业科学院

【目的】双季稻田水旱轮作后能够提高作物产能降低土壤有机质含量，但水旱轮作后化肥氮素配施不同有机物料对作物产量、氮素利用效率及有机质含量影响的报道较少。【方法】以玉米水稻轮作为研究对象，于2015—2021年在洞庭湖区紫潮泥和... 详细信息

【目的】双季稻田水旱轮作后能够提高作物产能降低土壤有机质含量，但水旱轮作后化肥氮素配施不同有机物料对作物产量、氮素利用效率及有机质含量影响的报道较少。【方法】以玉米水稻轮作为研究对象，于2015—2021年在洞庭湖区紫潮泥和红黄泥两种双季稻田上设置不施氮肥（CK）、单施化肥（NPK）、NPK+秸秆还田（NPKS）、NPK+有机肥（NPKM）、NPK+生物炭（NPKB）5种处理，探讨在两种土壤上不同施肥处理的作物产量、养分利用效率和土壤碳氮含量及平衡的变化。【结果】紫潮泥和红黄泥6年试验的平均玉米产量、水稻产量和年总产量分别为5.7、7.3和12.9 t·hm-2，三者在紫潮泥中的产量都略高于红黄泥，但差异都不显著。与NPK处理相比，NPKM处理使两种土壤的玉米和水稻平均产量分别显著（P<0.05）提高10.6%、4.20%。在所有处理中，NPKM处理玉米产量最高，为6.0 t·hm-2;NPKB处理水稻产量最高，为7.5 t·hm-2。NPKM和NPKB处理的6年平均年总产量分别显著（P<0.05）高于其他处理，但NPKM和NPKB处理间差异不显著。与其他处理相比，NPKM处理显著（P<0.05）提高了玉米水稻的化肥氮素回收率、农学效率和偏生产力，玉米季6年平均值分别为66.3%、39.5kg·kg-1、56.0 kg·kg-1，水稻季6年平均值分别为53.8%,21.9 kg·kg-1、68.6 kg·kg-1。NPKB处理较NPK、NPKS显著（P<0.05）提高了玉米水稻的化肥氮素农学效率和偏生产力，较NPK处理显著（P<0.05）提高了玉米化肥氮素回收率。两种土壤有机碳、全氮含量从第4年（2019年）开始显著下降。与试验开始前（2015年）相比，2021年紫潮泥和红黄泥施氮处理年平均有机碳含量分别下降了1.8、0.7 g·kg-1，全氮含量分别下降0.4、0.1 g·kg-1；两种土壤NPKM处理的土壤有机碳平均含量下降幅度最小、NPKB处理次之。NPKM处理的碳、氮投入量最高，平均土壤有机碳、全氮损失量最小，分别为0.48 t C·hm-2·a-1、94.7 kg N·hm-2·a-1。【结论】双季稻田水旱轮作后，化肥与有机肥、生物炭配施能提高作物产量和延缓土壤有机质下降，试验期间化肥配施有机肥处理玉米平均产量最高，化肥配施生物炭处理水稻平均产量最高。

关键词：玉米水稻轮作产量施肥措施土壤类型氮肥利用效率土壤碳氮

粘胶基碳纤维连续式电化学氧化表面处理(1)——碳纤维表面的物理化学性能

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玻璃钢／复合材料 2000年第1期 23-27页

作者：余木火赵世平滕翠青韩克清余奇平顾丽霞中国纺织大学材料科学与工程学院上海200051

本文报道了用连续式电化学氧化表面处理粘胶基碳纤维表面 ,并测定了处理后碳纤维的单丝强度、表面浸润性、表面活性官能团含量及表面形貌等表面物理化学性能。结果表明 :粘胶基碳纤维经电化学氧化表面处理可以有效地在表面产生活性官能... 详细信息

本文报道了用连续式电化学氧化表面处理粘胶基碳纤维表面 ,并测定了处理后碳纤维的单丝强度、表面浸润性、表面活性官能团含量及表面形貌等表面物理化学性能。结果表明 :粘胶基碳纤维经电化学氧化表面处理可以有效地在表面产生活性官能团和提高表面粗糙度 ,从而有效地提高表面润湿性 ,但经处理后单丝强度较易下降 ,因此需精确控制处理的条件。

关键词：粘胶基碳纤维电化学氧化处理碳纤维物理化学

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基于***和C#的下一代Internet网络设计

武汉化工学院学报 2004年第2期26卷 56-58页

作者：杨帆赵世平武汉化工学院电气信息学院湖北武汉430073 武汉化工学院计算机科学与工程学院湖北武汉430073

首先用 Frontpage和 Dreamweaver等网页制作工具为后勤服务总公司设计了一个网页 ,然后 ,用 C#语言在 Visual ***平台上为网络编辑了新闻发布和留言板等动态网页 .该网络具有了下一代 Inter-net网络的特点。

关键词：下一代Internet网络 C#语言 VisualStudioNET平台

Rice MtN3/saliva/SWEET gene family: Evolution,expression profiling, and sugar transport

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Journal of Integrative Plant Biology 2014年第6期56卷 559-570页

作者： Meng Yuan Junwei zhao Renyan Huang Xianghua Li Jinghua Xiao shiping Wang National Key Laboratory of Crop Genetic Improvement National Center of Plant Gene Research (Wuhan) Huazhong Agricultural University

The rice MtN3/saliva/SWEET gene family consists of 21 paralogs. However, their functions in physiological processes are largely unknown, although at least three of the 21 paralogs are used by pathogenic bacteria to infect rice. Here, we report the evolutionary features, transcriptional characteristics, and putative functions in sugar transport of this gene family. The wild rice accessions in this study included those with AA, BB, CC, BBCC, CCDD, EE, and GG genomes, which appeared approximately 0.58-14.6 million years ago. The structures, chromosomal locations, phylogenetic relationships, and homologous distribution among the accessions suggest that the number of rice MtN3/saliva/SWEET paralogs gradual y increased as the Oryza genus evolved, and one third of the paralogs may have originated recently. These paralogs are differentially expressed in vegetative and reproductive tissues, in the leaf senescence process, and in signaling dependent on gibberel ic acid, cytokinin, or 1-naphthalene acetic acid （an analog of auxin）, suggesting that they may be associated with multiple physiological processes. Four paralogs could transport galactose in yeast, which suggests that they may have a similar function in rice. These results will help to elucidate their roles and biochemical functions in rice development, adaptation to environment, host-pathogen interaction, and so forth.

关键词： Evolution MtN3/saliva domain Oryza sotivo transporter

Light-harvesting Polymer Based DNA Assay for SNP Identification of BRCA1 Mutations

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稀有金属材料与工程 2006年第A3期35卷 274-276页

作者： Jiang Li Xingfen Liu Hui Xu shiping Song Yun zhao Chunhai Fan School of Life Science Sichuan University Chengdu China Shanghai Institute of Applied Physics Chinese Academy of Sciences Shanghai China

We report an improved strategy for conjugated polymer-based optical DNA detection with stem-loop structured DNA *** high sensitivity of conjugated polymer-based biosensors arises from light harvesting by the conjugated polymer and the related amplified fluorescent signal transduction either through quenching or through Fǒrster energy transfer) In our previous publication,we demonstrated that the coupling of magnetic particles to conjugated polymers significantly improves the selectivity of this class of DNA *** we further improved the selectivity by introducing both stem-loop structured capture probe and competition *** demonstrated further that this improved magnetically assisted DNA sensor can conveniently identify even a single-nucleotide mismatch in the target sequence.

关键词： conjugated polymers DNA detection BRCA1 SNF identification

Study on traveling magnetic field casting of sheet components

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China Foundry 2010年第3期7卷 259-264页

作者： Su Yanqing Xu Yanjin zhao Lei Zhang Tiejun Wu shiping Guo Jingjie School of Materials Science and Engineering Harbin Institute of Technology Harbin 150001 China

The distribution of a magnetic field over an inductor used for sheet castings has been investigated *** an increase in height from the surface, the magnetic field density decreases according to the exponential *** the transverse direction, the magnetic field density is approximately uniform except near the *** magnetic field density is direct proportional to the number of turns multiplied by the current in ***-magnetic material in the upper mould can enhance the magnetic field *** the electromagnetic force, the mould-filling process of sheet casings has been studied by physical simulation *** difference in filling capability between gravity casting and travelling magnetic field casting has been *** electromagnetic force can enhance the filling process, but it also brings a *** an increase in the magnetic field density, the surface quality of the aluminum alloy sheet castings becomes *** reason is discussed.

关键词： traveling magnetic field casting magnetic field density mould filling process sheet castings

Green-emissive carbon quantum dots with high fluorescence quantum yield:Preparation and cell imaging

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Frontiers of Materials Science 2021年第2期15卷 253-265页

作者： Yingying WEI Lin CHEN Shaoban zhao Xuguang LIU Yongzhen YANG Jinglei DU Qiang LI shiping YU The Institute of New Carbon Materials Taiyuan University of TechnologyJinzhong 030600China Key Laboratory of Interface Science and Engineering in Advanced Materials(Ministry of Education) Taiyuan University of TechnologyTaiyuan 030024China Interventional Treatment Department Second Hospital of Shanxi Medical UniversityTaiyuan 030001China

High fluorescence quantum yield(QY),excellent fluorescence stability,and low toxicity are essential for a good cellular imaging fluorescent ***-emissive carbon quantum dots(CQDs)with many advantages,such as unique fluorescence properties,anti-photobleaching,low toxicity,fine biocompatibility and high penetration depth in tissues,have been considered as a potential candidate in cell imaging fluorescent ***,N,S-codoped green-emissive CQDs(QY=64.03%)were synthesized by the one-step hydrothermal method,with m-phenylenediamine as the carbon and nitrogen source,and L-cysteine as the nitrogen and sulfur dopant,under the optimum condition of 200℃ reaction for 2 *** luminescence was found to originate from the surface *** light of the satisfactory photobleaching resistance and the low cytotoxicity,CQDs were used as a cell imaging probe for HeLa cell *** results clearly indicate that cells can be labeled with CQDs,which can not only enter the cytoplasm,but also enter the nucleus through the nuclear pore,showing their broad application prospect in the field of cell imaging.

关键词： fluorescence quantum yield green emission carbon quantum dot N,S-codoping cell imaging

Enhanced efficiency and stability of perovskite solar cells by 2D perovskite vapor-assisted interface optimization

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Journal of Energy Chemistry 2020年第6期29卷 103-109,I0005页

作者： Minghui Chen Pengwei Li Chao Liang Hao Gu Weishuang Tong shiping Cheng Weili Li Ganqing zhao Guosheng Shao School of Chemistry and Environment Engineering Pingdingshan UniversityPingdingshan 467000HenanChina State Centre for International Cooperation on Designer Low-Carbon and Environmental Material(SCICDLCEM) School of Materials Science and EngineeringZhengzhou UniversityZhengzhou 450001HenanChina

Organic–inorganic perovskites solar cells(PSCs)have attracted great attention due to their rapid progress in power conversion efficiency(PCE).However,there is still an enormous challenge to achieve both high efficiency and stability devices as the decomposition of perovskite materials under humid and light ***,we demonstrate that high efficiency and stability of PSCs can be obtained by the reaction of three-dimensional(3D)perovskite with 1,4-butanediamine iodide(BEAI2)*** incorporation of BEAI2 intensively promotes the crystallization of perovskite film with large grain size(~500 nm).Further characterization reveals that the post-treatment perovskite film delivered low interface trap density with long carrier lifetime(>200 ns),long carrier diffusion length(>600 nm)and large carrier mobility(>1.5 cm^2 V-1S-1).Solar cells employing such post-treatment films demonstrated 19.58%PCE without ***,the post-treatment devices can retain over 90%original efficiencies stored under ambient atmospheric conditions and exhibit better stability under 85℃and continuous illumination as a two-dimensional(2D)perovskite thin layer is formed on the surface/or at the grain boundaries of 3D *** study offers an effective way to obtain PSCs with high efficiency and stability.

关键词： Perovskite solar cells 2D/3D perovskite Post-treatment Carrier diffusion length Mobility