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Root Exudation of Organic Acids of.herbaceous Pioneer Plants and Their Growth in Sterile and Non-Sterile Nutrient-Poor,Sandy Soils from Post-Mining Sites

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Pedosphere 2019年第1期29卷 34-44页

作者： Katja BOLDT-BURISCh Bernd Uwe SChNEIDER M.Anne NAETh Reinhard f.hTTL Chair of Soil Protection and Recultivation Brandenburg University of Technology helmholtz Centre Potsdam-German Research Centre for Geosciences Department of Renewable Resources University of Alberta

Nutrient-poor, sandy soils form the prevailing substrate at post-mining sites of the Lusatian region(Brandenburg, Germany) and present a challenge for vegetation development. We studied the organic acid quantity and composition of three commonly occurring pioneer plant species, the legumes Lotus corniculatus L. and Trifolium arvense L. and the grass Calamagrostis epigeios(L.) Roth, to determine if plant growth and exudation differed with(non-sterilized soil) and without(sterilized soil) an indigenous soil microbial community. We investigated whether organic acids were found in the rhizosphere and surrounding soil and whether this influenced nutrient mobilization. This study consists of linked field investigations and a greenhouse experiment. Plants were grown in the greenhouse in either sterilized or non-sterilized sandy soil from a reclamation site in the Lusatian mining landscape(Welzow Su¨d, East Germany). After seven months, the plant biomass, root morphology, organic acids, and water-soluble nutrients and root colonization with arbuscular mycorrhizal fungi(AMf) and dark septate endophytes(DSE) were analyzed. Roots of all three plants in the field and greenhouse experiments were highly colonized with AMf. Calamagrostis epigeios and T. arvense had a significantly higher colonization frequency with DSE than L. corniculatus. The quantity and composition of organic acids strongly differed among plant species, with the highest number of organic acids found for L. corniculatus and lowest for C. epigeios. The quantity of organic acids was greatly reduced in all plants under sterilized soil conditions. however, the composition of organic acids and plant growth in sterilized soil were reduced for both legumes, but not for C. epigeios, which had a higher biomass under sterilized conditions. Changes in nutrient concentrations in the field rhizosphere soil relative to those in the control were measurable after seven months. While the spectrum of organic acids and the growth

关键词： Calamagrostis epigeios indigenous soil microbial community Lotus corniculatus microbial colonization mining landscape nutrient mobilization root symbiotic partner Trifolium arvense

Basic fibroblast Growth factor and fibroblast Growth factor Receptor-1 in human Meningiomas

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Journal of.huazhong University of Science and Technology(Medical Sciences) 2005年第1期25卷 75-77页

作者：易伟陈坚 filimon h. golwa 薛德麟 Department of Neurosurgery Tongji Hospital Tongji Medical College Huazhong University of Science and Technology Wuhan 430030 China

The expression of basic fibroblast growth factor (bfGf) and fibroblast growth factor receptor-1 (fGfR-1) in human meningiomas and the relationships between their expression and the tumors' histological features and angiogenesis were investigated by means of immunohistochemical technique. The expression of bfGf and fGfR-1 was detected by antibody of bfGf or fGfR-1. The tumors' angiogenesis was evaluated by microvascular density (MVD) and, which was observed by use of CD34-antibody immunohistochemically. The results showed that there were varied degrees of the expression of bfGf and fGfR-1 proteins in meningiomas. The expression was correlated with the tumors' histological characters and angiogenesis. It was concluded that bfGf and fGfR-1 might play important roles in meningiomas' angiogenesis and proliferation. The expression positive rate of bfGf and fGfR-1 may provide an indication of evaluating the histological and malignant degree of the tumor.

关键词： meningiomas basic fibroblast growth factor fibroblast growth factor receptor-1 microvascular density immunohistochemistry

Photocurrent improvement of an ultra-thin silicon solar cell using the localized surface plasmonic effect of clustering nanoparticles

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Chinese Physics B 2020年第6期29卷 532-537页

作者： f Sobhani h heidarzadeh h Bahador Department of Electrical and Computer Engineering University of Mohaghegh ArdabiliArdabilIran

The cluster-shaped plasmonic nanostructures are used to manage the incident light inside an ultra-thin silicon solar *** we simulate spherical,conical,pyramidal,and cylindrical nanoparticles in a form of a cluster at the rear side of a thin silicon cell,using the finite difference time domain(fDTD)*** calculating the optical absorption and hence the photocurrent,it is shown that the clustering of nanoparticles significantly improves *** photocurrent enhancement is the result of the plasmonic effects of clustering the *** comparison,first a cell with a single nanoparticle at the rear side is *** four smaller nanoparticles are put around it to make a *** photocurrents of 20.478 mA/cm2,23.186 mA/cm2,21.427 mA/cm2,and 21.243 mA/cm2 are obtained for the cells using clustering conical,spherical,pyramidal,cylindrical NPs at the backside,*** values are 13.987 mA/cm2,16.901 mA/cm2,16.507 mA/cm2,17.926 mA/cm2 for the cell with one conical,spherical,pyramidal,cylindrical NPs at the backside,***,clustering can significantly improve the ***,the distribution of the electric field and the generation rate for the proposed structures are calculated.

关键词： clustering nanoparticles plasmonic solar cell localized surface plasmon resonance photocurrent finite difference time domain(fDTD)method light management

Charge susceptibilities of armchair graphene nanoribbon in the presence of magnetic field

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Chinese Physics B 2016年第9期25卷 511-517页

作者： h Rezania f Azizi Department of Physics Razi University

We present the behaviors of both dynamical and static charge susceptibilities of undoped armchair graphene nanoribbon using the Green＇s function approach in the context of tight binding model ***,the effects of magnetic field on the the plasmon modes of armchair graphene nanoribbon are investigated via calculating the correlation function of charge density *** results show that the increase of magnetic field makes the high-frequency plasmon mode for both metallic and insulating cases *** also show that low-frequency plasmon mode for metallic nanoribbon appears due to increase of magnetic ***,the number of collective excitation modes increases with ribbon width at zero magnetic ***,the temperature dependence of the static charge structure factor of armchair graphene nanoribbon is *** effects of both magnetic field and ribbon width on the static charge structure factor are discussed in detail.

关键词： armchair graphene nanoribbon Green's function

Nematode sperm maturation triggered by protease involves sperm-secreted serine protease inhibitor(Serpin)

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Nematode sperm maturation triggered by protease involves spe...

Risk factors of Elderly Depression and Quality of Life in Rural Community in Taiwan

中国遗传学会第二届“模式生物与人类健康”研讨会

作者：赵艳梅 f.hühmer Steven W.L'hernault 中国科学院生物物理研究所 Thermo fisher Scientific San JoseCA 94539 Department of Biology Emory UniversityAtlantaGA 30322

Spermiogenesis is a series of poorly understood morphological,physiological and biochemical processes that occur during the transition of immotile spermatids into motile, fertilization-competent ***,we identified a Serpin(serine protease inhibitor) family protein(AsRP-1) that is secreted from spenrmatids during nematode Ascaris suum

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Risk Factors of Elderly Depression and Quality of Life in Ru...

Elastic, thermodynamic, electronic, and optical properties of recently discovered superconducting transition metal boride NbRuB:An ab-initio investigation

The 8th Asia/Oceania Regional Congress of Gerontology and Geriatrics

作者： f.h-C0 Chou K-Y Tsai J-h Shau P-Y Chiu National Yang-Ming University Kaohsuing Kai-Suan Psychiatric hospital Kaohsuing Kai-Suan Psychiatric hospital Yu-Li hospita Jianan Mental hospital Taiwan

＜正＞Aims:This study is to explore the prevalence,risk factors and quality of life of the elderly with major depressive episode（MDE）in Taiwan rural *** MDE and other relative factors were investigated whether these...

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Chinese Physics B 2017年第10期26卷 339-347页

作者： f Parvin S h Naqib Department of Physics University of Rajshahi

The elastic, thermodynamic, electronic, and optical properties of recently discovered and potentially technologically important transition metal boride NbRuB, are investigated using the density functional formalism. Both generalized gradient approximation （GGA） and local density approximation （LDA） are used for optimizing the geometry and for estimating various elastic moduli and constants. The optical properties of NbRuB are studied for the first time with different photon polarizations. The frequency （energy） dependence of various optical constants complement quite well the essential features of the electronic band structure calculations. Debye temperature of NbRuB is estimated from the thermodynamical study. All these theoretical estimates are compared with published results, where available, and discussed in detail. Both electronic band structure and optical conductivity reveal robust metallic characteristics. The NbRuB possesses significant elastic anisotropy. Electronic features, on the other hand, are almost isotropic in nature. The effects of electronic band structure and Debye temperature on the emergence of superconductivity are also analyzed.

关键词： hard materials ternary borides DfT calculations electronic band structure optical properties superconductivity

Electrical Properties of Li-doped P-type ZnO Ceramics

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Journal of Materials Science & Technology 2009年第3期25卷 314-318页

作者： A.h. Salama f.f. hammad Physical Chemistry Department National Research Center Inorganic Chemistry Department National Research Center

Li-doped p-type ZnO ceramics were prepared by conventional methods according to the chemical formula Zn1-xLixO2 where x=0.5, 1.0, 1.5 and 2.0 mole fraction, respectively. The crystal structures of the prepared samples were studied by X-ray diffraction analysis. The dielectric properties （including dielectric constant ε′ and dielectric loss ε″） and dc-electrical conductivity [σ（Ω^-***^-1）] were investigated. The dielectric constant ε′ was sharply decreased at the low frequency range and independent on frequency at high frequency range. Otherwise, the dielectric loss ε″ varied with frequency and showed absorption peak located from 200 hz to 4 khz and moved to higher frequency as the concentration of Li＋ doped increased. It was found that dcelectrical conductivity logσ varied from -9 to -5 and the energy gap width were calculated by using Arrhenius equation. The p-type conductivity of Li-doped ZnO may be attributed to the formation of a Lizn-Lii donor complex, which is limited by reducing the amount of Lii.

关键词： P-type ZnO ceramics Dielectric constant Dielectric loss dc-conductivity

青光眼患者血清抗视网膜抗原的抗体轮廓质谱分析

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中华眼科杂志 2009年第7期45卷 625-630页

作者：严良 Joachim S. C Pfeiffer N Grus f.h Erb C 上海市宝山中心医院眼科 201900 Experimental Ophthalmology Department of Ophthalmology Johannes Gutenberg University Mainz Germany Department of Ophthalmology Schlosspark Klinik Berlin Germany

目的比较原发性开角型青光眼（POAG）患者与正常对照（CTRL）者间的抗体轮廓差异。方法病例对照研究。将44例POAG患者与48例CTRL者的血清分别加入到含有预洗Dyna珠-G蛋白的反应管中，以捕获人免疫球蛋白G（IgG）抗体，形成的IgG—G蛋白... 详细信息

目的比较原发性开角型青光眼（POAG）患者与正常对照（CTRL）者间的抗体轮廓差异。方法病例对照研究。将44例POAG患者与48例CTRL者的血清分别加入到含有预洗Dyna珠-G蛋白的反应管中，以捕获人免疫球蛋白G（IgG）抗体，形成的IgG—G蛋白复合体用来捕获目标抗原（匀质化牛视网膜组织）。经洗提后获得的抗原蛋白通过“表面增强激光解吸附-电离-飞行时间-质谱”仪进行检测。采用Proteomic software project统计学软件，对两组质谱数据连同受检者年龄和性别等参数，自动进行t检验和初步多变量判别分析；随后采用Statistica version8．0统计学软件，进行包括抗原蛋白质谱数据、蛋白质芯片类型和激光解吸附-电离能量等的多变量判别分析。结果CTRL组的平均质谱强度为4244．427±4721．115，POAG组为4049．864±4083．819，两组间差异有统计学意义（f=1．340，P〈0．01）；在POAG患者中，出现了部分高调节免疫反应，但主要表现为低调节免疫反应。结论在POAG患者与CTRL者之间存在明显的抗体轮廓差异，在POAG组中出现的低调节免疫反应表明部分患者可能与“异常免疫”有关。

关键词：青光眼开角型自身免疫自身抗体光谱法质量基质辅助激光解吸电离