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Vole preference of bilberry along gradients of simulated moose density and site productivity

Integrative Zoology 2011年第4期6卷 341-351页

作者： Simen PEDERSEN Harry P.ANDREASSEN inga-lill persson Riitta JULKUNEN-TIITTO Kjell DANELL Christina SKARPE Department of Forestry and Wildlife Management Hedmark University CollegeKoppangNorway Department of Biology Norwegian University of Science and TechnologyTrondheimNorway Department of Wildlife Fish and Environmental StudiesSwedish University of Agricultural SciencesUmeåSweden Department of Biology University of Eastern FinlandJoensuuFinland

Browsing by large herbivores might either increase or decrease preference for the plant by other herbivores,depending on the plant *** a cafeteria test,we studied the preference by root voles(Microtus oeconomus[Pallas,1776])for bilberry(Vaccinium myrtillus L.)previously subjected to 4 levels of simulated moose(Alces alces[Linnaeus,1758])*** different levels of moose density were simulated at population densities relevant for Fennoscandian conditions,in exclosures situated along a site productivity *** expected:(i)voles to prefer bilberry from high productivity sites over low productivity sites;(ii)voles to prefer browsed bilberry,if plants allocate resources to compensatory growth or to avoid browsed bilberry if plants allocate resources to defense;(iii)these effects to increase with increasing simulated moose density;and(iv)the concentration of plant chemicals and the plant morphology to explain vole ***,we predicted that voles would prefer:(i)plants with high nitrogen content;(ii)plants with low content of defensive substances;and(iii)tall plants with long *** preferred bilberry from the high productivity sites compared to the low productivity *** also found an interaction between site productivity and simulated moose density,where voles preferred unbrowsed plants at low productivity sites and intermediate levels of browsing at high productivity *** was no effect of plant chemistry or morphology on vole *** conclude that moose browsing impacts the food preference of *** the current high densities of moose in Fennoscandia,this could potentially influence vole food selection and population dynamics over large geographical areas.

关键词： browsing cervid herbivory induced defense Microtus

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Cutting Edge-an innovative psychosocial training program for healthcare professionals who provide appearance-altering procedures

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Plastic and Aesthetic Research 2023年第1期10卷 463-474页

作者： Martin persson Faculty of Health Science Kristianstad UniversityKristianstad 29188Sweden

Access to psychosocial care is considered a fundamental part of the care for conditions that result in a visible difference,such as cleft lip and *** the same time,there is a shortage of trained mental health professionals and structural resources,making it challenging to implement the psychosocial component of care for many healthcare providers ***,there is a need to find innovative ways to facilitate psychosocial *** article aims to describe the Cutting Edge Training program that was developed to increase the psychosocial understanding of healthcare professionals who provide care for patients undergoing appearancealtering *** program consists of five modules,with a particular emphasis on social determinants and the impact of living in an appearance-focused *** developed training program does increase knowledge and awareness of the negative impacts of appearance-related distress and how to improve patient care for those undergoing appearance-altering ***,it promotes a broader social dialogue about the need to encourage positive attitudes towards diversity in appearance,thus enhancing the future social integration of those who are affected by visible differences.

关键词： Psychosocial appearance-altering procedures visible differences body image education cleft lip and palate

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An Update on Xylan Synthesis

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Molecular Plant 2012年第4期5卷 769-771页

作者： Anett Doering Rahul Lathe Staffan persson Max-Planck-Institute for Molecular Plant Physiology Am Muehlenberg 1 14476 Potsdam Germany

Plant cell walls are complex structural frameworks that affect cell shape and differentiation, and that protect the plant cell against environmental conditions （Scheller and Ulvskov, 2010）. One of the major componen... 详细信息

关键词： POLYSACCHARIDES REVIEWS STRUCTURE XYLAN Fruits vegetables and nuts General aspects Plant cells xylan wall Cell Shape Xylans Fruit Polysaccharides Industrial processes

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The connection of cytoskeletal network with plasma membrane and the cell wall

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Journal of Integrative Plant Biology 2015年第4期57卷 330-340页

作者： Zengyu Liu Staffan persson Yi Zhang Max-Planck Institute for Molecular Plant Physiology ARC Centre of Excellence in Plant Cell Walls School of BotanyUniversity of Melbourne

The cell wall provides external support of the plant cells, while the cytoskeletons including the microtubules and the actin filaments constitute an internal framework. The cytoskeletons contribute to the cell wall biosynthesis by spatially and temporarily regulating the transportation and deposition of cell wall components. This tight control is achieved by the dynamic behavior of the cytoskeletons, but also through the tethering of these structures to the plasma membrane. This tethering may also extend beyond the plasma membrane and impact on the cell wall, possibly in the form of a feedback loop. In this review, we discuss the linking components between the cytoskeletons and the plasma membrane, and/or the cell wall. We also discuss the prospective roles of these components in cell wall biosyn- thesis and modifications, and aim to provide a platform for further studies in this field.

关键词： Cytoskeleton plant cell wall plasma membrane

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Iterative Subregion Correction Preconditioners with Adaptive Tolerance for Problems with Geometrically Localized Stiffness

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Communications on Applied Mathematics and Computation 2024年第2期6卷 811-836页

作者： Michael Franco Per-Olof persson Will Pazner Department of Mathematics University of CaliforniaBerkeleyBerkeleyCA 94720-3840USA Fariborz Maseeh Department of Mathematics and Statistics Portland State UniversityPortlandOR 97201USA

We present a class of preconditioners for the linear systems resulting from a finite element or discontinuous Galerkin discretizations of advection-dominated *** preconditioners are designed to treat the case of geometrically localized stiffness,where the convergence rates of iterative methods are degraded in a localized subregion of the *** convergence may be caused by a number of factors,including the mesh size,anisotropy,highly variable coefficients,and more challenging *** approach taken in this work is to correct well-known preconditioners such as the block Jacobi and the block incomplete LU(ILU)with an adaptive inner subregion *** goal of these preconditioners is to reduce the number of costly global iterations by accelerating the convergence in the stiff region by iterating on the less expensive reduced *** tolerance for the inner iteration is adaptively chosen to minimize subregion-local work while guaranteeing global convergence *** present analysis showing that the convergence of these preconditioners,even when combined with an adaptively selected tolerance,is independent of discretization parameters(e.g.,the mesh size and diffusion coefficient)in the *** demonstrate significant performance improvements over black-box preconditioners when applied to several model convection-diffusion ***,we present performance results of several variations of iterative subregion correction preconditioners applied to the Reynolds number 2.25×10^(6)fluid flow over the NACA 0012 airfoil,as well as massively separated flow at 30°angle of attack.

关键词： Subregion correction Nested Krylov Geometrically localized stiffness

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Molecular and genetic pathways for optimizing spikelet development and grain yield

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aBIOTECH 2020年第4期1卷 276-292页

作者： Zheng Yuan Staffan persson Dabing Zhang Joint International Research Laboratory of Metabolic and Developmental Sciences Shanghai Jiao Tong University-University of Adelaide Joint Centre for Agriculture and HealthState Key Laboratory of Hybrid RiceSchool of Life Sciences and BiotechnologyShanghai Jiao Tong UniversityShanghai 200240China School of Biosciences University of MelbourneMelbourneParkvilleVIC 3010Australia Department for Plant and Environmental Sciences University of Copenhagen1871 Frederiksberg CDenmark School of Agriculture Food and WineUniversity of AdelaideWaite CampusUrrbraeSA 5064Australia

The spikelet is a unique structure of inflorescence in grasses that generates one to many flowers depending on its determinate or indeterminate meristem *** growth patterns and number of spikelets,furthermore,define inflorescence architecture and ***,understanding the molecular mechanisms underlying spikelet development and evolution are attractive to both biologists and *** on the progress in rice and maize,along with increasing numbers of genetic mutants and genome sequences from other grass families,the regulatory networks underpinning spikelet development are becoming *** is particularly evident for domesticated traits in *** review focuses on recent progress on spikelet initiation,and spikelet and floret fertility,by comparing results from Arabidopsis with that of rice,sorghum,maize,barley,wheat,Brachypodium distachyon,and Setaria *** progress may benefit genetic engineering and molecular breeding to enhance grain yield.

关键词： Yield improvement Inflorescence Spikelet Fertility Breeding

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Solvation Effects on the Dielectric Constant of 1 M LiPF6 in Ethylene Carbonate:Ethyl Methyl Carbonate 3:7

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Energy & Environmental Materials 2024年第1期7卷 253-256页

作者： Julian Self Nathan T.Hahn Kristin A.persson Department of Chemical Engineering Polytechnique MontrealMontrealQC H3T 1J4Canada Department of Materials Science and Engineering University of CaliforniaBerkeleyCA 94720USA Energy Technologies Area Lawrence Berkeley National LaboratoryBerkeleyCA 94720USA Material Physical and Chemical Sciences CenterSandia National LaboratoriesAlbuquerqueNM 87185USA

We report the dielectric constant of 1 M LiPF_(6)in EC:EMC 3∶7 w/w(ethylene carbonate/ethyl methyl carbonate)in addition to neat EC:EMC 3∶7 w/*** three Debye relaxations,the static permittivity value,or dielectric constant,is extrapolated to 18.5,which is compared to 18.7 for the neat solvent *** EC solvent is found to strongly coordinate with the Li^(+)cations of the salt,which results in a loss of dielectric contribution to the ***,the small amplitude and large uncertainty in relaxation frequency for EMC cloud definitive identification of the Li^(+)solvation ***,the loss of the free EC permittivity contribution due to Li^(+)solvation is almost completely balanced by the positive contribution of the associated LiPF_(6)salt,demonstrating that a significant quantity of dipolar ion pairs exists in 1 M LiPF_(6)in EC:EMC 3∶7.

关键词： batteries dielectric relaxation spectroscopy electrolytes

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A high-throughput framework for determining adsorption energies on solid surfaces

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npj Computational Materials 2017年第1期3卷 357-360页

作者： Joseph H.Montoya Kristin A.persson Lawrence Berkeley National Laboratory 1 Cyclotron RoadBerkeleyCA 94720USA Department of Materials Science and Engineering University of CaliforniaBerkeleyCA 94720USA

In this work,we present a high-throughput workflow for calculation of adsorption energies on solid surfaces using density functional *** open-source computational tools from the Materials Project infrastructure,we automate the procedure of constructing symmetrically distinct adsorbate configurations for arbitrary *** algorithms are further used to construct and run workflows in a standard,automated way such that user intervention in the simulation procedure is *** validate our approach,we compare results from our workflow to previous experimental and theoretical benchmarks from the CE27 database of chemisorption energies on solid *** benchmarks also illustrate how the task of performing and managing over 200 individual density functional theory calculations may be reduced to a single submission procedure and subsequent *** enabling more efficient high-throughput computations of adsorption energies,these tools will accelerate theory-guided discovery of advanced materials for applications in catalysis and surface science.

关键词： theory. adsorption determining

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A New Model Inspired by the Pompeii Worm to Reverse Overheating in Nanosatellites

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Space(Science & Technology) 2023年第1期3卷 133-140页

作者： Ayşe MeriçYazıcı Erik persson Department of Philosophy Lund UniversityLundSweden

Nanosatellites are exposed to extreme temperatures on the spacecraft surface,which can reach up to±100℃.In this paper,we suggest a novel solution to this challenge by the use of *** imitation of the behavior of living creatures in nature is an attempt to understand and synthesize a natural object or phenomenon in an abstract or concrete *** inspiration from living things in nature can come through the materials,processes,or designs we see around us,and there is no engineering effort *** nature,the best example of temperature reversal is the Pompeii *** Pompeii worm realizes the conversion of the excess heat it is exposed to into cooling inside a multilayered *** this work,inspired by the strategy of the Pompeii worm in reversing overheating,we present a new model for the overheating problem in nanosatellites.

关键词： form heating extreme

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Salt with a sweet tooth:galactan synthesis impacts salt tolerance in Arabidopsis

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Molecular Plant 2021年第3期14卷 361-363页

作者： Liu Wang Edwin R.Lampugnani Staffan persson School of Biosciences University of MelbourneParkvilleMelbourne 3010Australia Department for Plant and Environmental Sciences University of Copenhagen1871 Frederiksberg CDenmark Copenhagen Plant Science Center University of Copenhagen1871 Frederiksberg CDenmark Joint International Research Laboratory of Metabolic&Developmental Sciences State Key Laboratory of Hybrid RiceSchool of Life Sciences and BiotechnologyShanghai Jiao Tong UniversityShanghaiChina

Abiotic stresses result in the loss of millions of dollars'worth of agricultural crops each year(Munns and Tester,2008).The accumulation of sodium chloride in soils is a prominent abiotic stress and poses significant challenges to farmers(Munns et al.,2020).Moreover,soil salinity is predicted to worsen with the rise in global temperatures and depletion of groundwater resources.

关键词： synthesis dollar crops

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