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The plastid Envelope CHLOROpLAST mANGANESE TRANSpORTER1 Is Essential for manganese Homeostasis in Arabidopsis

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molecular plant 2018年第7期11卷 955-969页

作者： marion Eisenhut Natalie Hoecker Sidsel Birkelund Schmidt Rubek merina Basgaran Samantha Flachbart peter Jahns Tabea Eser Stefan Geimer Seren Husted Andreas p.m. Weber Dario Leister Anja schneider Biochemie der pflanzen Cluster of Excellence on Plant Science (CEPLAS) Heinrich-Heine-University Di3sseldorf 40225 Desseldorf Germany molekularbiologie der pflanzen (Botanik) Department Biologie I Ludwig-Maximilians-University Mernchen 82152 Martinsried Germany Department of plant and Environmental Sciences and Copenhagen plant Science Centre (CpSC) Faculty of Science University of Copenhagen 1871 Frederiksberg Denmark Zellbiologie/Elektronenmikroskopie NW I/B1 Universit&t Bayreuth 95447 Bayreuth Germany These authors contributed equally to this article.

The transition metal manganese （mn） is indispensable for photoautotrophic growth since photosystem II （pSII） employs an inorganic mn4CaOs cluster for water splitting. Here, we show that the Arabidopsis membrane protein CHLOROpLAST mANGANESE TRANSpORTER1 （CmT1） is involved in chloroplast mn homeostasis. CmT1 is the closest homolog of the previously characterized thylakoid mn transporter pHOTOSYNTHESIS-AFFECTED mUTANT71 （p.m.1）. In contrast to p.m.1, CmT1 resides at the chloro- plast envelope and is ubiquitously expressed. Nonetheless, like p.m.1, the expression of CmT1 can also alleviate the mn-sensitive phenotype of yeast mutant qomrl. The cmtl mutant is severely suppressed in growth, chloroplast ultrastructure, and pSII activity owing to a decrease in the amounts of pigments and thylakoid membrane proteins. The importance of CmT1 for chloroplast mn homeostasis is demonstratedby the significant reduction in chloroplast mn concentrations in cmtl-1, which exhibited reduced mn binding in pSII complexes. moreover, CmT1 expression is downregulated in mn-surplus conditions. The p.m.1 cmtl-ldouble mutant resembles the cmtl-f single mutant rather than pare71 in most respects. Taken together, our results suggest that CmT1 mediates mn2 uptake into the chloroplast stroma, and that CmT1 and p.m.1 function sequentially in mn delivery to pSII across the chloroplast envelope and the thylakoid membrane.

关键词： manganese transporter envelope chloroplast photosynthesis Arabidopsis

production of composites with high relative permittivity using the spouted bed technique

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particuology 2019年第1期17卷 184-189页

作者： E. Eichner p.-K. Fischer S. Heinrich GA schneider Institute of Solids process Engineering and particle Technology Denickestr1521073 HamburgGermany Institute of Advanced Ceramics Hamburg University of TechnologyDenickestr1521073 HamburgGermany

This contribution presents a new application of the spouted bed technique. The developed production process involves coating fine copper particles with a polymer in a spouted bed plant and then hot pressing the produced granules to form a compact consisting of a copper–polymer composite with a high filling degree. The fabricated composites possess high relative permittivity, which is advantageous for the production of effective capacitors. With increasing filling degree of copper, the relative permittivity of the composites increased, with a maximum relative permittivity of 214 obtained for the composite containing 78.1 vol% copper. Such a high filling degree can be achieved with conductive particles without obtaining a conductive composite by using the spouted bed technology in the production process. The high relative permittivity results from the high filling degree of particles isolated by a polymer coating.

关键词： Spouted bed High relative permittivity Fine particles Coating metal-polymer composite

Growth of the tropical pinus kesiya as influenced by climate and nutrient availability along an elevational gradient

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Journal of plant Ecology 2020年第1期13卷 97-106页

作者： Le Tuan Ho Raimund schneider Frank m.Thomas Department of Geobotany University of TrierFaculty of Regional and Environmental SciencesBehringstraße 2154296 TrierGermany Department of Forest Resources management Faculty of ForestryNong Lam University HCMCThu Duc DistrictHo Chi Minh CityVietnam Department of Soil Science University of TrierFaculty of Regional and Environmental SciencesBehringstraße 2154296 TrierGermany

Aims In contrast to temperate regions,the reasons for growth reductions of individual tree species along elevational gradients in tropical mountain ranges are poorly known,especially for tropical *** aimed at testing whether climatic or edaphic conditions are responsible for the reduced growth of pinus kesiya,a widely distributed pine species of southern and south-eastern Asia,at higher *** We analysed the stem diameter increment and the isotope discrimination against ^(13)C(△^(13)C)in tree rings of *** along an elevational gradient of~900 to~2000 m *** the mountain ranges of South-Central Vietnam,and related growth to△^(13)C and to climatic and edaphic *** findings We found no consistent correlation patterns between the basal area increment(BAI)of the trees and temperature or *** contrast,across the elevational gradient,we obtained significantly negative correlations of BAI with△^(13)C and with the C/N ratios and theδ^(15)N signature of the upper mineral *** was positively correlated with the concentrations of plant-available phosphorus(p_(a))and of“base”cations(calcium,magnesium,potassium)in the *** conclude that lower temperatures at higher elevations exert an indirect effect on tree growth by inducing higher C/N ratios and by reducing the rate of nitrogen(N)and p.m.neralization,which may be further hampered by lower concentrations of“base”cations(upon enhanced leaching by precipitation)and a negative feedback from low availability of mineralized N and p at higher *** results may be transferable to the uppermost growth limit of *** and to other montane regions of the species’occurrence.

关键词： dendroecology pine pointer year soil nutrient stable isotope

Thinking about worry:A systematic review and meta-analysis on the assessment of metacognitions in children and adolescents

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World Journal of psychiatry 2021年第9期11卷 635-658页

作者： Laura m Kocher Kai schneider Hanna Christiansen Department of psychology University of MarburgMarburg 35037Germany Department of Clinical Child and Adolescent psychology University of LandauLandau 76829Germany

BACKGROUND The metacognitive model of generalized anxiety disorder identifies three forms of metacognition:positive metacognitive beliefs about worry(pOS),negative metacognitive beliefs about worry(NEG),and *** this model was originally developed relying on adult samples,it has since been applied to children and youth in different studies,and results mostly support its validity for this *** the roles of pOS,meta-worry,and age-effects do not appear to be fully clarified for children and adolescents yet,an integration of studies on children and adolescents and the metacognitive model is both timely and *** To summarize the current research on relationships,age-effects,and measurements for pOS,NEG,and meta-worry in childhood and *** We carried out a literature search in the electronic databases psycINFO,pubmed,pSYNDEX,and ERIC in 2017 and updated in *** research in German or English language on metacognition was included with child and adolescent samples diagnosed with anxiety disorders or healthy controls if pOS,NEG,or meta-worry were *** were included for meta-analysis if they reported correlations between these metacognitions and anxiety or *** rating for eligibility was done for 20.89% of full-texts with 90.32% *** of bias was assessed with the appraisal tool for cross-sectional studies and consensus rating of appraisal tool for cross-sectional studies for 20.83% of included studies attaining agreement of intraclass correlation=***,correlations between metacognitions,anxiety and worry were calculated with Revman 5.4.1,assuming random-effects ***-regressions with mean age as the covariate were performed via the online tool metamar ***-ID:*** Overall,k=763 records and k=78 additional records were *** those,k=48 studies with 12839 participants were included and of those,k=24 studies were included for *** studie

关键词： metacognition Anxiety Child Adolescent measures meta-analysis

Insights into manganese transport: A matter of phosphorylation

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molecular plant 2022年第3期15卷 385-387页

作者： Anja schneider plant Science Faculty of BiologyLudwig-Maximilians-Universität MünchenMunichGermany

manganese(mn)is an essential element required for the growth of all known living *** plants acquire mn from the rhizosphere,and its translocation into,and distribution within,the plant involves a multitude of transporters(Alejandro et al.,2020).In the aerial part of the green plant,the most prominent reaction that depends on mn is the water-splitting reaction of photosystem II,which employs a tetra-mn cluster located in the thylakoid lumen of ***,no less important reactions take place in mitochondria,where a mn superoxide dismutase acts as a scavenger of reactive oxygen species,and in the Golgi apparatus,where mn-dependent glycosyltransferases are involved in cell wall biosynthesis.

关键词： manganese apparatus splitting

Attritor-milling of poly(amide imide) suspensions

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particuology 2014年第6期12卷 92-96页

作者： m.F.H.Wolff S.Antonyuk S.Heinrich G.A.schneider Hamburg University of Technology Institute of Solids Process Engineering and Particle Technology Hamburg University of Technology Institute of Advanced Ceramics

The milling behavior of poly(amide imide),which serves as a prototypical hydrophilic high-performance polymer with a high glass transition temperature,was *** milling conditions(milling times up to 7h,stirrer tip speeds of 3.4-4.9 m/s,and mass concentrations of 5-20%) were tested,and particle sizes as low as d50,33μm were *** milling was performed at 11℃ in an *** scanning calorimetry and thermogravimetric analysis were performed before and after milling to investigate the effect of milling on the glass transition temperature and on the decomposition behavior of the *** suspension obtained after milling was observed to be stable without the addition of stabilizers or the adjustment of the pH value,and no negative effect of milling on the polymer properties was *** attritor technique proved to be an adequate and efficient milling tool for the production of micrometer-sized high-performance polymer suspensions.

关键词： Attritor polymer Grinding Suspension

AppROXImATING THE STATIONARY BELLmAN EQUATION BY HIERARCHICAL TENSOR pRODUCTS

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Journal of Computational mathematics 2024年第3期42卷 638-661页

作者： mathias Oster Leon Sallandt Reinhold schneider Technische Universität Berlin Strasse des 17.Juni 13510623 BerlinGermany

We treat infinite horizon optimal control problems by solving the associated stationary Bellman equation numerically to compute the value function and an optimal feedback *** dynamical systems under consideration are spatial discretizations of non linear parabolic partial differential equations(pDE),which means that the Bellman equation suffers from the curse of *** non linearity is handled by the policy Iteration algorithm,where the problem is reduced to a sequence of linear equations,which remain the computational bottleneck due to their high *** reformulate the linearized Bellman equations via the Koopman operator into an operator equation,that is solved using a minimal residual *** the Koopman operator we identify a preconditioner for operator equation,which deems essential in our numerical *** overcome computational infeasability we use low rank hierarchical tensor product approximation/tree-based tensor formats,in particular tensor trains(TT tensors)and multi-polynomials,together with high-dimensional quadrature,*** controlling a destabilized version of viscous Burgers and a diffusion equation with unstable reaction term numerical evidence is given.

关键词： Feedback control Dynamic programming Hamilton-Jacobi-Bellman Tensor product approximation Variational monte-Carlo

Efficacy of morning-only 4 liter sulfa free polyethylene glycol vs 2 liter polyethylene glycol with ascorbic acid for afternoon colonoscopy

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World Journal of Gastroenterology 2014年第30期20卷 10620-10627页

作者： John m Rivas Alejro perez marlow Hernez Alison schneider Ferno J Castro Digestive Disease Center Cleveland Clinic FloridaWestonFL 33331United States Department of Gastroenterology University of Medicine and Dentistry of New JerseyStratfordNJ 08084United States Department of Internal medicine Cleveland Clinic FloridaWestonFL 33331United States

AIm: To compare the bowel cleansing efficacy of same day ingestion of 4-L sulfa-free polyethylene glycol (4-L SF-pEG) vs 2-L polyethylene glycol solution with ascorbic acid (2-L pEG + Asc) in patients undergoing after... 详细信息

关键词： Bowel preparation Colonoscopy Screening colonoscopy Colon cancer screening

Tribological mechanisms of slurry abrasive wear

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Friction 2023年第6期11卷 1079-1093页

作者： Yulong LI paul SCHREIBER Johannes schneider Christian GREINER Institute for Applied material(IAm) Karlsruhe Institute of Technology(KIT)Karlsruhe76131Germany KIT IAm-Zm microTribology Center(μTC) Karlsruhe76131Germany

Abrasive wear mechanisms—including two-body and three-body abrasion—dominate the performance and lifespan of tribological systems in many engineering fields,even of those operating in lubricated *** steel(100Cr6)pins and discs in a flat-on-flat contact were utilized in experiments together with 5 and 13 μm Al_(2)O_(3)-based slurries as interfacial media to shed light on the acting *** results indicate that a speed-induced hydrodynamic effect occurred and significantly altered the systems'frictional behavior in tests that were performed using the 5 μm *** experiments revealed that a speed-dependent hydrodynamic effect can lead to a 14% increase in film thickness and a decrease in friction of around 2/3,accompanied by a transition from two-body abrasion to three-body abrasion and a change in wear mechanism from microcutting and microploughing to fatigue ***,no correlation could be found between the total amount of wear and the operating state of the system during the experiment;however,the wear distribution over pin and disc was observed to change *** paper studies the influence of the hydrodynamic effect on the tribological mechanism of lubricated abrasive wear and also highlights the importance to not only consider a tribological systems'global amount of wear.

关键词： abrasive wear two-body abrasion three-body abrasion hydrodynamic effect steel