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Arbuscular mycorrhizal fungal colonization of Glycyrrhiza glabra roots enhances plant biomass,phosphorus uptake and concentration of root secondary metabolites

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Journal of Arid Land 2014年第2期6卷 186-194页

作者： HongLing LIU Yong TAN Monika NELL Karin ZITTER-EGLSEER Chris WAWSCRAH Brigitte kopp ShaoMing WANG Johannes NOVAK Normal College Shihezi University Institute of Applied Botany University of Veterinary Medicine College of Pharmacy Shihezi University College of Life Sciences Shihezi University

Arbuscular mycorrhizal （AM） fungi penetrate the cortical cells of the roots of vascular plants, and are widely distributed in soil. The formation of these symbiotic bodies accelerates the absorption and utilization of min- eral elements, enhances plant resistance to stress, boosts the growth of plants, and increases the survival rate of transplanted seedlings. We studied the effects of various arbuscular mycorrhizae fungi on the growth and devel- opment of licorice （Glycyrrhiza glabra）. Several species of AM, such as Glomus mosseae, Glomus intraradices, and a mixture of fungi （G. mosseae, G intraradices, G. cladoideum, G microagregatum, G caledonium and G. etunica- tum） were used in our study. Licorice growth rates were determined by measuring the colonization rate of the plants by the fungi, plant dry biomass, phosphorus concentration and concentration of secondary metabolites. We estab- lished two cloned strains of licorice, clone 3 （C3） and clone 6 （C6） to exclude the effect of genotypic variations. Our results showed that the AM fungi could in fact increase the leaf and root biomass, as well as the phosphorus con- centration in each clone. Furthermore, AM fungi significantly increased the yield of certain secondary metabolites in clone 3. Our study clearly demonstrated that AM fungi play an important role in the enhancement of growth and development of licorice plants. There was also a significant improvement in the secondary metabolite content and yield of medicinal compounds from the roots.

关键词： licorice arbuscular mycorrhizal fungi phosphorus medical compounds

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Wide gap active brazing of ceramic-to-metal-joints for high temperature applications

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Frontiers of Mechanical Engineering 2014年第1期9卷 71-74页

作者： K. Bobzin Zhao, N. kopp S. Samadian Anavar Surface Engineering Institute RWTH Aachen University Germany

Applications like solid oxide fuel cells and sensors increasingly demand the possibility to braze ceramics to metals with a good resistance to high temperatures and oxidative atmospheres. Commonly used silver based active filler metals cannot fulfill these requirements, if application temperatures higher than 600℃ occur. Au and Pd based active fillers are too expensive for many fields of use. As one possible solution nickel based active fillers were developed. Due to the high brazing temperatures and the low ductility of nickel based filler metals, the modification of standard nickel based filler metals were necessary to meet the requirements of above mentioned applications. To reduce thermally induced stresses wide brazing gaps and the addition of A1203 and WC particles to the filler metal were applied. In this study, the microstructure of the brazed joints and the thermo-chemical reactions between filler metal, active elements and WC particles were analyzed to understand the mechanism of the so called wide gap active brazing process. With regard to the behavior in typical application oxidation and thermal cycle tests were conducted as well as tensile tests.

关键词： wide gap active brazing nickel filler metals,high temperature application WC A1203

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Linking the effect of localised pitting corrosion with mechanical integrity of a rare earth magnesium alloy for implant use

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Bioactive Materials 2023年第3期21卷 32-43页

作者： Kerstin van Gaalen Conall Quinn Felix Benn Peter E.McHugh Alexander kopp Ted J.Vaughan Biomechanics Research Centre(BioMEC) Biomedical EngineeringSchool of EngineeringNational University of Ireland GalwayGalwayIreland Meotec GmbH AachenGermany School of Mechanical and Aerospace Engineering Queen’s University BelfastBelfastUnited Kingdom

This study presents a computational framework that investigates the effect of localised surface-based corrosion on the mechanical performance of a magnesium-based alloy.A finite element-based phenomenological corrosion model was used to generate a wide range of corrosion profiles,with subsequent uniaxial tensile test simulations to predict the mechanical response to *** python-based detection framework PitScan provides detailed quantification of the spatial phenomenological features of corrosion,including a full geometric tracking of corroding *** this approach,this study is the first to quantitatively demonstrate that a surface-based non-uniform corrosion model can capture both the geometrical and mechanical features of a magne-sium alloy undergoing corrosion by comparing to experimental *** this verified corrosion modelling approach,a wide range of corrosion scenarios was evaluated and enabled quantitative relationships to be established between the mechanical integrity and key phenomenological corrosion *** particular,we demonstrated that the minimal cross-sectional area parameter was the strongest predictor of the remaining mechanical strength(R2=0.98),with this relationship being independent of the severity or spatial features of localised surface ***,our analysis demonstrated that parameters described in ASTM G46-94 showed weaker correlations to the mechanical integrity of corroding specimens,compared to parameters determined by *** study establishes new mechanistic insight into the performance of the magnesium-based materials undergoing corrosion.

关键词： Magnesium Localised corrosion Corrosion modelling Phenomenology FEM

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Cultured keratinocyte grafting on various biologic matrices

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第二军医大学学报 1998年第S1期19卷 5-12页

作者： Stark GB△ Horch RE Voigt M kopp J Saied S Jiao XY Guest professor of Second Military Medical University From the Department of Plastic and Hand Surgery and Tissue Engineering Lab. and valley TEC University of Freiburg Medical Center Freiburg Germany Department of Plastic Surgery Changhai Hospital Second Military Medical University Shanghai 200433

１ＩｎｔｒｏｄｕｃｔｉｏｎＣｕｌｔｕｒｅｄｋｅｒａｔｉｎｏｃｙｔｅｓａｓｒｅｌａｔｉｖｅｌｙｄｉｆｅｒｅｎｔｉ－ａｔｉｅｄｓｈｅｅｔｇｒａｆｔｓｈａｖｅｉｍｐｒｏｖｅｄｔｈｅｃａｒｅｆｏｒｂｕｒｎｓａｎｄｏｔｈｅｒｗ... 详细信息

１ＩｎｔｒｏｄｕｃｔｉｏｎＣｕｌｔｕｒｅｄｋｅｒａｔｉｎｏｃｙｔｅｓａｓｒｅｌａｔｉｖｅｌｙｄｉｆｅｒｅｎｔｉ－ａｔｉｅｄｓｈｅｅｔｇｒａｆｔｓｈａｖｅｉｍｐｒｏｖｅｄｔｈｅｃａｒｅｆｏｒｂｕｒｎｓａｎｄｏｔｈｅｒｗｏｕｎｄｓ．Ｆｏｒｔｈｅｌａｓｔｄ...

关键词： keratinocyte culture tissue engineering skin substitute burns biomaterials

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ZUR ?KONOMIE ?GYPTENS BIS ZUM ENDE DES NEUEN REICHES

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Journal of Ancient Civilizations 2017年第2期32卷 211-228页

作者： Heidi kopp-Junk Agyptologie Universitat Trier

Der Nil bildete mit seinen Nebenflüssen und Kan?len sowie einem weitverzweigten System von Landwegen ein zusammenh?ngendes Transportund Verkehrsnetz,das eine florierende Wirtschaft erm?*** dem Binnenhandel ist zudem seit frühester Zeit ein weitreichender Fernhandel ***?gyptische Gesellschaft warüberwiegend agrarisch gepr?gt,und seit der Frühzeit ist ein anwachsender Beamtenstand *** Durchführung von staatlichen Bauvorhaben wie Pyramiden oder Tempeln *** Arbeitseins?tzen wurde die Bev?lkerung seit dem Alten Reich zum Corvée-Dienst verpflichtet.

关键词： Der Nil bildete Beamtenstand Corvée-Dienst verpflichtet

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KGF-transfected cells can stimulate growth and proliferation of human cultured keratinocytes in vitro

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第二军医大学学报 1998年第S1期19卷 78-80页

作者： kopp J△ Jiao XY▲ Dai FP Kulmburg P△ Chen YL Stark GB△ Department of Plastic Surgery Changhai Hospital Second Military Medical University Shanghai200433 Department of Plastic and Hand Surgery University Medical CenterFreiburgGermany From Department of Burn Changhai Hospital Second Military Medical University Shanghai 200433

１ＩｎｔｒｏｄｕｃｔｉｏｎＥｐｉｄｅｒｍａｌｒｅｇｅｎｅｒａｔｉｏｎｉｓａｃｏｍｐｌｅｘｐｒｏｃｅｓｓｉｎｗｈｉｃｈｒｅｓｉｄｕａｌｅｐｉｔｈｅｌｉａｌｃｅｌｓｐｒｏｌｉｆｅｒａｔｅｔｏｒｅｇｅｎ－ｅｒａｔｅｔｈｅｉ... 详细信息

１ＩｎｔｒｏｄｕｃｔｉｏｎＥｐｉｄｅｒｍａｌｒｅｇｅｎｅｒａｔｉｏｎｉｓａｃｏｍｐｌｅｘｐｒｏｃｅｓｓｉｎｗｈｉｃｈｒｅｓｉｄｕａｌｅｐｉｔｈｅｌｉａｌｃｅｌｓｐｒｏｌｉｆｅｒａｔｅｔｏｒｅｇｅｎ－ｅｒａｔｅｔｈｅｉｎｔａｃｔｅｐｉｄｅｒｍｉｓ［１］...

关键词： keratinocyte growth factor gene transfection keratinocyte

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Automated ex-situ detection of pitting corrosion and its effect on the mechanical integrity of rare earth magnesium alloy-WE43

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Bioactive Materials 2022年第2期7卷 545-558页

作者： Kerstin van Gaalen Felix Gremse Felix Benn Peter E.McHugh Alexander kopp Ted J.Vaughan Biomechanics Research Centre(BioMEC) Biomedical EngineeringSchool of EngineeringCollege of Science and EngineeringNational University of Ireland GalwayGalwayIreland Meotec GmbH AachenGermany Institute for Experimental Molecular Imaging RWTH Aachen UniversityAachenGermany School of Mechanical and Aerospace Engineering Queen’s University BelfastBelfastUnited Kingdom

This study develops a three-dimensional automated detection framework(PitScan)that systematically evaluates the severity and phenomenology of pitting *** framework uses a python-based algorithm to analyse microcomputer-tomography scans(μCT)of cylindrical specimens undergoing *** approach systematically identifies several surface-based corrosion features,enabling full spatial characterisation of pitting parameters,including pit density,pit size,pit depth as well as pitting factor according to ASTM ***,it is used to evaluate pitting formation in tensile specimens of a Rare Earth Magnesium alloy undergoing corrosion,and relationships between key pitting parameters and mechanical performance are *** demonstrated that several of the parameters described in ASTM G46-94,including pit number,pit density and pitting factor,showed little correlation to mechanical ***,this study did identify that other parameters showed strong correlations with the ultimate tensile strength and these tended to be directly linked to the reduction of the cross-sectional area of the ***,our results indicate,that parameters directly linked to the loss of the cross-sectional area(*** material width),are parameters that are most suited to provide an indication of a specimen’s mechanical *** automated detection framework developed in this study has the potential to provide a basis to standardise measurements of pitting corrosion across a range of metals and future prediction of mechanical strength over degradation time.

关键词： Magnesium Corrosion Degradation Micro-computer-tomography Pit detection Automatization Mechanical integrity

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***,vision-based navigation and the PG master’s degree programme at HfT Stuttgart

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Geo-Spatial Information Science 2023年第2期26卷 156-159页

作者： michael Hahn Faculty of Geomatics Computer Science and MathematicsStuttgart University of Applied SciencesStuttgartGermany

The two topics of the article seem to have absolutely nothing to do with each other and,as can be expected in a contribution in honor and memory of *** Ackermann,they are linked in his ***-based Navigation was the focus of the doctoral thesis written by the author,the 29th and last PhD thesis supervised by *** International Master’s Program Photogrammetry and Geoinformatics,which the author established with colleagues at Stuttgart University of Applied Sciences(HfT Stuttgart)in 1999,was a consequence of ***’s benevolent promotion of international knowledge transfer in *** topics are reflected in this article;they provide further splashes of color in ***’s oeuvre.

关键词： Vision-based navigation visual odometry photogrammetry and geoinformatics international master’s degree program

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Opportunistic maintenance for multi-component systems considering structural dependence and economic dependence

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Journal of Systems Engineering and Electronics 2015年第3期26卷 493-501页

作者： Junbao Geng michael Azarian michael Pecht College of Power Engineering Naval University of Engineering Center for Advanced Life Cycle Engineering University of Maryland

Although opportunistic maintenance strategies are widely used for multi-component systems, all opportunistic mainte- nance strategies only consider economic dependence and do not take structural dependence into account. An opportunistic main- tenance strategy is presented for a multi-component system that considers both structural dependence and economic dependence. The cost relation and time relation among components based on structural dependence are developed. The maintenance strategy for each component of a multi-component system involves one of five maintenance actions, namely, no-maintenance, a minimal maintenance action, an imperfect maintenance action, a perfect maintenance action, and a replacement action. The maintenance action is determined by the virtual age of the component, the life expectancy of the component, and the age threshold values. Monte Carlo simulation is designed to obtain the optimal oppor- tunistic maintenance strategy of the system over its lifetime. The simulation result reveals that the minimum maintenance cost with a strategy that considers structural dependence is less than that with a strategy that does not consider structural dependence. The availability with a strategy that considers structural dependence is greater than that with a strategy that does not consider structural dependence under the same conditions.

关键词： opportunistic maintenance multi-component system,structural dependence Monte Carlo simulation maintenance cost.

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From“stars”to nano:Porous poly(ethylene glycol)hydrogel films and nanosheets as a versatile platform for sensing and nanofabrication

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Nano Research 2024年第11期17卷 10069-10082页

作者： michael Zharnikov Angewandte Physikalische Chemie Universität Heidelberg Im Neuenheimer Feld 253 D-69120 Heidelberg Germany

The use of bioinert materials is crucially important for medicine and *** most popular systems in this context are oligo-and poly(ethylene glycols)(OEGs and PEGs),applied generally in different forms as bulk materials,thin films,and functional molecular ***,I review the fabrication,properties,and applications of porous hydrogel PEG films(PHFs)and nanosheets(PHNs)formed by thermally activated crosslinking of amino-and epoxy-terminated,star-branched PEG oligomers with variable molecular *** systems possess various useful characteristics,including tunable thickness and porosity,hydrogel properties,bioinertness,robustness,and extreme *** can serve as the basis for composite materials,advanced nanofabrication,and lithography,bioinert supports for high-resolution transmission electron microscopy,susceptible elements in micro-electromechanical systems,and basic building blocks of temperature,humidity,chemical,and biological *** examples of the respective applications are *** though these examples span a broad field-from nanoengineering to biosensing,the applications of the PHFs and PHNs are certainly not limited to these cases but can be specifically adapted and extended to other fields,such as tissue engineering and drug delivery,relying on versatility and tunability of these systems.

关键词： poly(ethylene glycol) hydrogel films bioinertness nanosheets sensors composite materials

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