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mechanical Characterisation of Densified Hardwood with Regard to Structural Applications

Journal of Renewable materials 2020年第9期8卷 1091-1109页

作者： katharina müller Walter Sonderegger Oliver Kläusler michael Klippel Edwin Zea Escamilla Institute of Structural Engineering(IBK) Chair of Structural Engineering–Timber StructuresSwiss Federal Institute of Technology ZurichZurich8093Switzerland Swiss Wood Solutions AG 8600 DübendorfSwitzerlandPreviously at Institute for Building Materials(IfB)Chair of Wood Materials ScienceSwiss Federal Institute of Technology ZurichZurich8093Switzerland College of Civil Engineering Nanjing Forestry UniversityNanjing210037China Sustainable Building Center for Corporate Responsibility and SustainabilityUniversity of ZurichZurich8001Switzerland

The demand for high-performance,yet eco-friendly materials is increasing on all scales from small applications in the car industry,instrument or furniture manufacturing to greater dimensions like floorings,balcony furnishings and even *** offers a good choice on all of these scales and can be modified and improved in many different *** this study,two common European hardwood species,Beech(Fagus sylvatica L.)and Ash(Fraxinus excelsior L.)were densified in radial direction by thermo-mechanical treatment and the densified product was investigated in an extensive characterisation series to determine all relevant mechanical *** in the three main directions(longitudinal,tangential,radial)and tension perpendicular to the grain(tangential,radial)were tested and compared to reference specimens with native *** and modulus of elasticity were determined in all *** addition,a Life Cycle Assessment was carried out to evaluate the environmental impact associated to the densification *** experimental investigations showed that strength and stiffness of hardwood in the longitudinal and tangential directions improve significantly by radial densification,whereas some properties in the radial direction *** Life Cycle Assessment showed that artificial wood drying has higher impact than wood ***,the transport distance of the raw material highly influences the environmental impact of the final densified *** paper then also offers an overview of possible applications in structural timber *** hardwood is a viable option as local reinforcement,where high compressive or tensile strength is *** wood densification process offers an alternative to the use of carbon-intense steel components or hardwoods from tropical forests.

关键词： Hardwood densification high-performance construction materials thermo-mechanical treatment mechanical characterisation life cycle assessment timber structures

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Locus coeruleus-norepinephrine: basic functions and insights into Parkinson’s disease

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Neural Regeneration Research 2020年第6期15卷 1006-1013页

作者： Bilal Abdul Bari Varun Chokshi katharina Schmidt The Solomon H.Snyder Department of Neuroscience Brain Science InstituteKavli Neuroscience Discovery InstituteThe Johns Hopkins University School of MedicineBaltimoreMDUSA Department of Physiology The Johns Hopkins University School of MedicineBaltimoreMDUSA

The locus coeruleus is a pontine nucleus that produces much of the brain's *** its small size,the locus coeruleus is critical for a myriad of functions and is involved in many neurodegenerative and neuropsychiatric *** this review,we discuss the physiology and anatomy of the locus coeruleus system and focus on norepinephrine's role in synaptic *** highlight Parkinson's disease as a disorder with motor and neuropsychiatric symptoms that may be understood as aberrations in the normal functions of locus coeruleus.

关键词： catecholamines copper neurodegenerative diseases neuromodulation neuronal circuits neuropsychiatric symptoms noradrenaline synaptic plasticity

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Iron catalyzed michael addition: Chloroferrate ionic liquids as efficient catalysts under microwave conditions

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Science China Chemistry 2012年第8期55卷 1614-1619页

作者： VASILOIU maria GAERTNER Peter BICA katharina Institute of Applied Synthetic Chemistry Vienna University of Technology Vienna A-1060 Austria

The iron containing ionic liquid 1-butyl-3-methylimidazolium tetrachloroferrate （[C4mim]C1/FeCl3; Z = 0.5） proved to be an efficient catalyst for the solvent-free metal catalyzed michael addition of β-keto esters and enones. Due to the ionic structure of the catalyst, a significant acceleration of the reaction rate was observed under microwave conditions. Furthermore, recycling of the ionic liquid catalyst could be performed after simply distilling off the products.

关键词： ionic liquids iron catalysis michael addition lewis acid microwave chemistry

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Divergent foraging behavior in a hybrid zone： Darwin＇s tree finches （Camarhynchus spp.） on Floreana Island

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Current Zoology 2015年第1期61卷 181-190页

作者： katharina J. PETERS Sonia KLEINDORFER School of Biological Sciences Flinders University GPO Box 2100 Adelaide 5001 Australia

Hybrid speciation is increasingly recognized as a mechanism for novel evolutionary trajectories. However, we know very little about the ecology of a contact zone that has arisen in sympatry. This study examines the foraging behavior and fitness of two species of Darwin＇s tree finches （Camarhynchus parvulus, C pauper） and hybrid offspring on Floreana Island. Previous study showed that the percentage of hybrids in the tree finch population increased from 19% in 2005 to 41% in 2010, and their body and beak size increased by -5% （parental phenotype did not change）. In 2005-2006, all three tree finch groups （two paren- tal species and hybrid birds） used the same foraging substrate, technique, and height. By 2010-2013, the small tree finch C. par- vulus had changed its foraging technique and the medium tree finch C. pauper had changed its foraging height. Both parental species had higher body condition when foraging at （divergent） mean foraging heights per species but hybrid birds did not. We discuss the implications of conserving forest to facilitate vertical niche expansion and the role of hybridization for genetic persis- tence [Current Zoology 61 （1）： 181-190, 2015].

关键词： Hybridization Speciation Adaptive radiation Conservation Scalesia Ecological niche

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Tea and depression

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Food Science and Human Wellness 2022年第3期11卷 476-482页

作者： Klaus W.Lange Yukiko Nakamura katharina m.Lange Hui Zhao Department of Experimental Psychology University of RegensburgRegensburg 93040Germany Tianjin Key Laboratory of Food and Biotechnology University of CommerceTianjin 300134China

The available evidence,which derives from studies investigating mechanistic effects of tea,research on animal models as well as epidemiological studies and intervention trials in humans,suggests that compounds contained in tea may have the potential to aid in the prevention of depression or in its treatment as an addition to established therapies.A wide range of potentially antidepressive biological activities of tea components have been ***,the mechanisms of tea phytochemicals possibly capable of decreasing the risk of depressive symptoms are complex,multifaceted and not well *** pharmacological effects on circumscribed neurobiological systems may be produced not by individual tea components but rather by the synergistic action of various compounds on multiple pathophysiological mechanisms involved in *** epidemiological studies have generally demonstrated beneficial effects of tea consumption on mood and depressive symptoms,cross-sectional studies are unable to prove a cause-effect *** positive effects on mood could be firmly established,tea drinking could support mental ***,the moderate antidepressive effects observed in healthy people are not necessarily indicative of possible clinical effects in major depressive *** controlled intervention studies are needed to establish a causal relationship between bioactive compounds in tea and depression.

关键词： Depression Tea L-theanine Prevention Treatment

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Discrete Vector Calculus and Helmholtz Hodge Decomposition for Classical Finite Difference Summation by Parts Operators

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Communications on Applied mathematics and Computation 2020年第4期2卷 581-611页

作者： Hendrik Ranocha katharina Ostaszewski Philip Heinisch Institute Computational mathematics TU BraunschweigUniversitatsplatz 238106 BrunswickGermany Extreme Computing Research Center(ECRC) Computer Electrical and Mathematical Science and Engineering Division(CEMSE)King Abdullah University of Science and Technology(KAUST)Thuwal 23955-6900Saudi Arabia Institut für Angewandte Numerische Wissenschaft e.V.(IANW) Bienroder Straae 338110 BrunswickGermany Institut für Geophysik und Extraterrestrische Physik TU BraunschweigMendelssohnstraBe 338106 BrunswickGermany

In this article,discrete variants of several results from vector calculus are studied for clas-sical finite difference summation by parts operators in two and three space *** is shown that existence theorems for scalar/vector potentials of irrotational/solenoidal vector fields cannot hold discretely because of grid oscillations,which are characterised *** results in a non-vanishing remainder associated with grid oscillations in the discrete Helmholtz Hodge ***,iterative numerical methods based on an interpretation of the Helmholtz Hodge decomposition via orthogonal projections are pro-posed and applied *** numerical experiments,the discrete remainder vanishes and the potentials converge with the same order of accuracy as usual in other first-order partial differential *** by the successful application of the Helmholtz Hodge decomposition in theoretical plasma physics,applications to the discrete analysis of magnetohydrodynamic(mHD) wave modes are presented and discussed.

关键词： Summation by parts Vector calculus Helmholtz Hodge decomposition mimetic properties Wave mode analysis

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Outcome after early mobilization following hip reconstruction in children with developmental hip dysplasia and luxation

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World Journal of Pediatrics 2018年第2期14卷 176-183页

作者： katharina Susanne Gather Eva von Stillfried Sebastien Hagmann Sebastian müller Thomas Dreher Center of Orthopaedic and Trauma Surgery/Spinal Cord Injury Center Heidelberg University HospitalSchlierbacher Landstr.200a69118 HeidelbergGermany

Background most orthopedic surgeons prefer spica cast immobilization in children for 4 to 12 weeks after surgical hip reconstruction in children with developmental hip *** challenging treatment may be associated with *** are lacking that focus on early mobilization without casting for postoperative care after hip *** Twenty-seven children(3.4±2.0 years),including 33 hips with developmental hip dysplasia(DDH)and dislocation of the hip(Tonnis grade 1 to 4),who underwent hip reconstruction(Dega acetabuloplasty,varisation-derotation osteotomy and facultative open reduction)were retrospectively included in this *** the patients were placed in an individual foam shell with 30 degrees of hip abduction,hip extension,and neutral *** mobilization physiotherapy was performed within the first few days after the surgery under epidural *** weight bearing was allowed after 3-4 *** children received a clinical examination and radiographic evaluation before and after surgical *** follow-up period was 12.3±2.9 *** On average,the postoperative acetabular index decreased significantly from 36.9 to 21.7 degrees and the center-edge angle increased from 9.9 to 28.6 *** hips had reached Tonnis grade 1 at the time of the last *** complications such as dislocation of the bone wedge,avascular necrosis of the acetabulum or femur,lack of non-union,or nerve injury,were *** In this cohort study,hip reconstruction was successful according to clinical and radiographic outcome param-eters after early mobilization without cast *** mobilization may be used as an alternative treatment option after hip reconstruction in DDH.

关键词： Dega acetabuloplasty Developmental hip dysplasia Early mobilization Spica cast Varisation-derotation osteotomy

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Effect of faade systems on the performance of cooling ceilings: In situ measurements

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Frontiers of Architectural Research 2015年第1期4卷 68-78页

作者： katharina Eder Thomas Bednar Department for Building Physics and Building Acoustic Vienna University of TechnologyAdolf-Blamauer-Gasse 1-31030ViennaAustria

This article presents an innovative faade system designed to increase the thermal comfort inside an office room and to enhance the cooling capacity of the suspended cooling ceiling.A series of measurements is conducted in an existing office building with different faade systems(i.e., a combination of glazing and shading). An innovative faade system is developed based on this intensive set of measurements. The new system enhances the thermal comfort and cooling capacity of the suspended cooling ceiling. The main usage of the new system is the refurbishment and improvement of existing faade systems.

关键词： Office building Innovative fa?ade systems Cooled ceiling Increase in the cooling capacity of cooled ceiling Interaction of building envelope and cooled ceiling Effect on comfort

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Does ash dieback affect the reproductive ecology of Fraxinus excelsior L.?

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林业研究（英文版） 2024年第2期 58页

作者： Anna-katharina Eisen Lisa Buchner Barbara Fussi Susanne Jochner-Oette

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Twenty-first century climate change and submerged aquatic vegetation in a temperate estuary:the case of Chesapeake Bay

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Ecosystem Health and Sustainability 2017年第7期3卷 14-34页

作者： Thomas m.Arnold Richard C.Zimmerman katharina A.m.Engelhardt J.Court Stevenson Departments of Biology and Environmental Studies Dickinson CollegeCarlislePAUSA Department of Ocean Earth and Atmospheric SciencesOld Dominion UniversityNorfolkVAUSA Appalachian Laboratory University of Maryland Center for Environmental ScienceFrostburgMDUSA Horn Point Laboratory University of Maryland Center for Environmental ScienceCambridgeMDUSA

Introduction:The Chesapeake Bay was once renowned for expansive meadows of submerged aquatic vegetation(SAV).However,only 10%of the original meadows *** restoration effortswill be complicated by accelerating climate change,including physiological stressors such as a predicted mean temperature increase of 2-6℃and a 50-160%increase in CO_(2)***:As the Chesapeake Bay begins to exhibit characteristics of a subtropical estuary,summer heat waves will become more frequent and *** alone would eventually eliminate eelgrass(Zostera marina)from the *** will favor native heat-tolerant species such as widgeon grass(Ruppia maritima)while facilitating colonization by non-native seagrasses(e.g.,Halodule spp.).Intensifying human activity will also fuel coastal zone acidification and the resulting high CO_(2)/low pH conditions may benefit SAV via a“CO_(2)fertilization effect.”Discussion:Acidification is known to offset the effects of thermal stress and may have similar effects in estuaries,assuming water clarity is sufficient to support CO_(2)-stimulated photosynthesis and plants are not overgrown by ***,coastal zone acidification is variable,driven mostly by local biological processes that may or may not always counterbalance the effects of regional *** precarious equipoise between two forces-thermal stress and acidification-will be critically important because it may ultimately determine the fate of cool-water plants such as Zostera marina in the Chesapeake ***:The combined impacts of warming,coastal zone acidification,water clarity,and overgrowth of competing algae will determine the fate of SAV communities in rapidly changing temperate estuaries.

关键词： Submerged aquatic vegetation climate temperature coastal acidification Chesapeake Bay

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