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Complementarity among species in horizontal versus vertical rooting space

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Journal of Plant Ecology 2008年第1期1卷 33-41页

作者： stefanie von Felten Bernhard Schmid Institute of Environmental Sciences University of Zurich8057 ZurichSwitzerland Institute of Plant Sciences ETH Zurich8092 ZurichSwitzerland

Aims Many experiments have shown a positive effect of species richness on productivity in grassland plant ***,it is poorly understood how environmental conditions affect this *** aimed to test whether deep soil and limiting nutrient conditions increase the complementarity effect(CE)of species richness due to enhanced potential for resource *** We grew monocultures and mixtures of four common grassland species in pots on shallow and deep soil,factorially combined with two nutrient *** volume was kept constant to avoid confounding soil depth and *** an additive partitioning method,we separated biodiversity effects on plant productivity into components due to species complementarity and *** findings Net biodiversity and complementarity effects were consistently higher in shallow pots,which was unexpected,and at the low nutrient *** two results suggest that although belowground partitioning of resources was important,especially under low nutrient conditions,it was not due to differences in rooting *** conclude that in our experiment(i)horizontal root segregation might have been more important than the partitioning of rooting depths and(ii)that the positive effects of deep soil found in other studies were due to the combination of deeper soil with larger soil volume.

关键词： biodiversity effects nutrient limitation resource partitioning root competition soil depth

A Spectral Analysis of 155 Seyfert 1 Type AGN

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天文研究与技术 2003年第S1期 42-45页

作者： stefanie Komossa Max Planck Institut für extraterrestrische Physik Giessenbachstr. D 85748 Garching Germany

We present the results of optical spectral analysis of a sample of 155 bright X ray selected ROSAT Seyfert 1 type AGN. We measured emission line properties by performing multi component fits to the emission line profiles, covering the effect of blended iron emission. We also obtained continuum parameters, including 250eV X ray luminosities derived from the ROSAT database. The measured properties are gathered for correlation analysis. Strong correlations between Hβ redshift, flux ratios of Fe Ⅱ to Hβ broad component and to Hβ narrow component are found. The observed trends are most likely driven by the Eddington ratio.

关键词： A Spectral Analysis of 155 Seyfert 1 Type AGN BSC FWHM RASS

Nogo-A and its functions beyond axonal inhibition: the controversial role of Nogo-A in Parkinson's disease

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Neural Regeneration Research 2015年第8期10卷 1223-1224页

作者： stefanie Seiler Hans R.Widmer Department of Neurosurgery Neurocenter and Regenerative Neuroscience Cluster University Hospital Bern Switzerland University of Bern Graduate School for Cellular and Biomedical Sciences University of Bern

Nogo-A belongs to the reticulon family（RTN4）and is generally assumed to be one of the most potent myelin associated neurite outgrowth inhibitors in the central nervous system（CNS）.Together with other inhibitors su... 详细信息

关键词： Nogo axonal myelin belongs glycoprotein potent controversial assumed Together amyotrophic

Diversifying Resistance Mechanisms in Cereal Crops Using Microphenomics

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Plant Phenomics 2023年第1期5卷 1-5页

作者： Peter M.Dracatos stefanie Lück Dimitar K.Douchkov Department of Animal Plant and Soil SciencesAgriBioLa Trobe UniversityBundooraVIC 3086Australia Leibniz Institute of Plant Genetics and Crop Plant Research(IPK)Gatersleben Corrensstrasse 306466 Seeland OT GaterslebenGermany

hole-grain cereals,including wheat,barley,oat,rye,corn,rice,millet,and triticale,are a rich source of calories,essential vitamins,minerals,and phytochemicals that both nourish and protect humans and animals from diseases such as heart attack and cancer[1].However,susceptibility to foliar diseases caused by necrotrophic or biotrophic fungal pathogens continues to reduce yield potential or lead to total crop failure and famine in developing nations[2].Historically,foliar diseases of cereals have been controlled using either fungicide treatment[3]or plant breeding[4].

关键词： breeding cereal corn

Method of cells-based multiscale modeling of elastic properties of filament wound C/C-SiC including free Si and matrix porosity

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Journal of Materials Science & Technology 2019年第12期35卷 2906-2918页

作者： Evan J.Pineda Marek Fassin stefanie Reese Jaan-Willem Simon NASA Glenn Research Center 21000 Brookpark RoadMS 49/7ClevelandOH 44135United States Institute for Applied Mechanics RWTH Aachen UniversityMies-van-der-Rohe-Str.152074 AachenGermany

Three different multiscale models, based on the method of cells(generalized and high fidelity) micromechanics models were developed and used to predict the elastic properties of C/C-SiC composites. In particular, the following multiscale modeling strategies were employed: Concurrent modeling of all phases using the generalized method of cells, synergistic(two-way coupling in space) multiscale modeling with the generalized method of cells, and hierarchical(one-way coupling in space) multiscale modeling with the high fidelity generalized method of cells. The three models are validated against data from a hierarchical multiscale finite element model in the literature for a repeating unit cell of C/***, the multiscale models are used in conjunction with classical lamination theory to predict the stiffness of C/C-SiC plates manufactured via a wet filament winding and liquid silicon infiltration process recently developed by the German Aerospace Institute. Finally, un-reacted Si(or free Si) and porosity in the C matrix are included in the multiscale model, and the effect of these new phases on the stiffness and local stresses are considered.

关键词： Multiscale modeling C/C-SiC Ceramic matrix composites

The early development of face processing——What makes faces special?

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Neuroscience Bulletin 2012年第6期28卷 765-788页

作者： stefanie Hoehl stefanie Peykarjou Department of Psychology University of HeidelbergHauptstr47-51 Heidelberg 69117Germany

In the present article we review behavioral and neurophysiological studies on face processing in adults and in early development. From the existing empirical and theoretical literature we derive three aspects that distinguish face processing from the processing of other visual object categories. Each of these aspects is discussed from a developmental perspective. First, faces are recognized and represented at the individual level rather than at the basic level. Second, humans typically acquire extensive expertise in individuating faces from early on in development. And third, more than other objects, faces are processed holistically. There is a quantitative difference in the amount of visual experience for faces and other object categories in that the amount of expertise typically acquired for faces is greater than that for other object categories. In addition, we discuss possible qualitative differences in experience for faces and objects. For instance, there is evidence for a sensitive period in infancy for building up a holistic face representation and for perceptual narrowing for faces of one＇s own species and race. We conclude our literature review with questions for future research, for instance, regarding the exact relationship between behavioral and neuronal markers of face processing across development.

关键词： face processing development infants visual expertise holistic processing event-related potential

A biomimetic basementmembrane consisted of hybrid aligned nanofibers andmicrofibers with immobilized collagen IV and laminin for rapid endothelialization

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Bio-Design and Manufacturing 2021年第2期4卷 171-189页

作者： Chenglong Yu Guoping Guan stefanie Glas Lu Wang Zhutong Li Lih-Sheng Turng Key Laboratory of Textile Industry for Biomedical Textile Materials and Technology College of TextilesDonghua University2999 North Renmin RoadSongjiang DistrictShanghai 201620China Engineering Research Center of Technical Textiles of Ministry of Education College of TextilesDonghua UniversityShanghai 201620China Wisconsin Institute for Discovery University of Wisconsin-Madison330 North Orchard StreetMadisonWI 53715USA Department of Mechanical Engineering University of Wisconsin-Madison1513 University AveMadisonWI 53706USA

Rapid formation of a continuous endothelial cell(EC)monolayer with healthy endothelium function on the luminal surface of vascular implants is imperative to improve the longtime patency of small-diameter vascular *** the present study,we combined the contact guidance effects of aligned nanofibers,which enhance EC adhesion and proliferation because of its similar fiber scale with native vascular basement membranes,and aligned microfibers,which could induce EC elongation effectively and allow ECs *** was followed by successive immobilization of collagen IV and laminin to fabricate a biomimetic basement membrane(BBM)with structural and compositional *** hemolysis assay and platelet adhesion results showed that the BBM exhibited excellent ***,the adhered human umbilical vein endothelial cells(HUVECs)onto theBBMaligned along the orientation of the microfibers with an elongated morphology,and the data demonstrated that the BBM showed favorable effects on EC attachment,proliferation,and *** oriented EC monolayer formed on the BBM exhibited improved antithrombotic capability as indicated by higher production of nitric oxide and prostacyclin(PGI2).Furthermore,fluorescence images indicated that HUVECs could infiltrate into the BBM,implying theBBM’s ability to enhance transmural ***,theBBMpossessed the properties to regulate ECbehaviors and allow transmural ingrowth,demonstrating the potential to be applied as the luminal surface of small-diameter vascular implants for rapid endothelialization.

关键词： Biomimetic basement membranes Aligned electrospun fibers Surface modification Endothelialization Anti-thrombogenicity Transmural ingrowth

The Impact of Leaders' Roles on CSR-with the Evolution of Organizational Culture as the Intermediary

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The Impact of Leaders' Roles on CSR-with the Evolution of Or...

作者： stefanie Zitzmann 上海财经大学

学位级别：硕士

中国的组织行为已经大大转向了对环境问题的关注,因此中国的每个企业都在努力为企业社会责任尽自己的一份力量。因此,本研究基于领导者在影响企业社会责任相关组织活动中的作用。组织文化的作用在这方面至关重要,因为任何组织的文化都... 详细信息

中国的组织行为已经大大转向了对环境问题的关注,因此中国的每个企业都在努力为企业社会责任尽自己的一份力量。因此,本研究基于领导者在影响企业社会责任相关组织活动中的作用。组织文化的作用在这方面至关重要,因为任何组织的文化都会影响其与CSR相关的运营和业务行为。因此,本研究旨在通过调节组织文化来分析领导者的角色及其对企业社会责任的影响。该研究结合了基于数据收集调查技术的定量研究。向中国机构的350名员工发放了调查问卷,其中318份经过数据筛选后收到,随后可以通过SPSS和AMOS进行分析。结构方程模型已用于假设检验,表明领导力沟通与企业社会责任之间存在重要关联。然而,领导激励和领导团队管理对企业社会责任的影响一直不显着。结果表明,LC、LTM和LM之间的组织文化对CSR的中介作用是显着的。本研究通过扩展领导力和企业社会责任理论,并为中国企业了解不同领导角色对企业社会责任的有益影响提供实践见解,具有更大的理论和实践意义。本研究还揭示了组织文化的重要性及其对中国企业CSR活动的相关影响。

关键词：企业社会责任领导团队管理领导激励领导沟通组织文化

Long-term effects of environmentally relevant concentrations of silver nanoparticles on microbial biomass, enzyme activity,and functional genes involved in the nitrogen cycle of loamy soil

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Journal of Environmental Sciences 2018年第7期30卷 12-22页

作者： Anna-Lena Grün Susanne Straskraba stefanie Schulz Michael Schloter Christoph Emmerling Faculty of Regional and Environmental Sciences Department of Soil Science University of Trier J.W.Goethe University Institute of Molecular Biosciences Research for Comparative Microbiome Analysis Helmholtz Zentrum München Chair for Soil Science Technische Universit?t München

The increasing production and use of engineered silver nanoparticles（AgNP） in industry and private households are leading to increased concentrations of AgNP in the environment. An ecological risk assessment of AgNP is needed, but it requires understanding the long term effects of environmentally relevant concentrations of AgNP on the soil microbiome. Hence, the aim of this study was to reveal the long-term effects of AgNP on soil microorganisms. The study was conducted as a laboratory incubation experiment over a period of one year using a loamy soil and AgNP concentrations ranging from 0.01 to 1 mg AgNP/kg soil. The short term effects of AgNP were, in general, ***, after one year of exposure to 0.01 mg AgNP/kg, there were significant negative effects on soil microbial biomass（quantified by extractable DNA; p = 0.000） and bacterial ammonia oxidizers（quantified by amo A gene copy numbers; p = 0.009）. Furthermore, the tested AgNP concentrations significantly decreased the soil microbial biomass, the leucine aminopeptidase activity（quantified by substrate turnover; p = 0.014）, and the abundance of nitrogen fixing microorganisms（quantified by nif H gene copy numbers; p = 0.001）. The results of the positive control with Ag NO3 revealed predominantly stronger effects due to Ag＋ion release. Thus, the increasing toxicity of AgNP during the test period may reflect the long-term release of Ag^＋ions. Nevertheless, even very low concentrations of AgNP caused disadvantages for the microbial soil community, especially for nitrogen cycling, and our results confirmed the risks of releasing AgNP into the environment.

关键词： Silver nanoparticles Soil Microbiome amoA nifH Leucine aminopeptidase activity AgPure