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Utilizing the full capacity of carbon black as anode for Na-ion batteries via solvent co-intercalation

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Nano Research 2017年第12期10卷 4378-4387页

作者： Wei Xiao Qian sun Jian Liu Biwei Xiao Per-anders Glans Jun Li Ruying Li Jinghua Guo Wanli Yang Tsun-Kong sham Xueliang sun Department of Mechanical & Materials Engineering University of Western Ontario London Ontario N6ASB9 Canada Department of Chemistry University of Western Ontario London Ontario N6ASB7 Canada Advanced Light source Lawrence Berkeley National Laboratory Berkeley California 94720 USA

Carbonaceous materials have long been considered promising anode materials for Na-ion batteries. However, the electrochemical performance of conventional carbon anodes is generally poor because the sodium ion storage solely relies on the disordered region of the carbon materials in a carbonate-based electrolyte. The solvent co-intercalation mechanism for Na ions has been recently reported in natural graphite anodes for Na-ion batteries with ether-based electrolytes, but their capacities are still unsatisfactory. We show here for the first time that by combining regular Na ion storage in the disordered carbon layer and solvent co-intercalation mechanism in the graphitized layer of a commercial N330 carbon black as an anode material for Na-ion batteries in ether-based electrolyte, the reversible capacity could be fully realized and doubled in magnitude. This unique sodium intercalation process resulted in a significantly improved electrochemical performance for the N330 electrode with an initial reversible capacity of 234 mAh.g-1 at 50 mA.g-1 and a superior rate capability of 105 mAh.g-1 at 3,200 mA-g-1. When cycled at 3,200 mA.g-1 over 2,000 cycles, the electrode still exhibited a highly reversible capacity of 72 mAh.g-1 with a negligible capacity loss per cycle （0.0167%）. Additionally, surface-sensitive C K-edge X-ray absorption spectroscopy, with the assistance of electrochemical and physicochemical characterizations, helped in identifying the controlled formation and evolution of a thin and robust solid electrolyte interphase film. This film not only reduced the resistance for sodium ion diffusion, but also maintained the structural stability of the electrode for extended cycle reversibility. The superior electrochemical performance of N330 carbon black strongly demonstrated the potential of applying ether-based electrolytes for a wide range of carbon anodes apart from natural graphite.

关键词： carbon black anode sodium-ion batteries ether-based electrolyte co-intercalation

Constructive advice from two successful China hands

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China International Business 2010年第6期 54-55页

作者： Johan Bjorksten anders Hagglund

Johan Bjorksten and anders Hagglund each have over 20 years experience running successful busi-nesses in China. Bjorksten, CIB＇s regular PR columnist, is the founder of Eastwei Relations, a leading local PR consultan... 详细信息

关键词：中国顾问服务跨国公司创始人公关银行

The Ornithodolite as a tool to quantify animal space use and habitat selection: a case study with birds diving in tidal waters

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Integrative Zoology 2019年第1期14卷 4-16页

作者： Emma-Louise COLE James J WAGGITT anders HEDENsTROM Marco PIANO Mark D.HOLTON Luca BÖRGER Emily L.C.sHEPARD Department of Biosciences Swansea UniversitySwanseaUK school of Ocean sciences Bangor UniversityMenai BridgeUK Department of Biology Lund UniversityEcology BuildingSweden Centre for Applied Marine sciences Bangor UniversityMenai BridgeUK

Animal-attached technologies can be powerful means to quantify space use and behavior;however,there are also ethical implications associated with capturing and instrumenting ***,tagging approaches are not necessarily well-suited for examining the movements of multiple individuals within specific,local areas of ***,we assess a method of quantifying animal space use based on a modified theodolite with an inbuilt laser *** a database of>4200 tracks of migrating birds,we show that detection distance in-creases with bird body mass(range 5 g to>10 kg).The maximum distance recorded to a bird was 5500 m and measurement error was≤5 m for targets within this distance range:a level comparable to methods such as GPs *** go on to present a case study where this method was used to assess habitat selection in seabirds operating in dynamic coastal waters close to a tidal *** positional data with outputs from a hydrographic model revealed that great cormorants(Phalacrocorax carbo)appeared to be highly selective of current characteristics in space and time,exploiting areas where mean current speeds weres^(−1) and diving at times when turbulent energy levels were *** birds also oriented into tidal currents during *** together,this suggests that collision risks are low for cormorants at this site,as the 2 conditions avoided by cormorants(high mean current speeds and turbulence levels)are associated with operational tidal ***-all,we suggest that this modified theodolite system is well-suited to the quantification of movement in small areas associated with particular development strategies,including sustainable energy devices.

关键词： GPs habitat use movement ecology seabird tidal turbine

First principles modelling of spin-polarised electron transport——Virtual Nanolab and Atomistix ToolKit ’s application in materials science

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First principles modelling of spin-polarised electron transp...

spatial Transferability of Vegetation Types in Distribution Models Based on sample surveys from an Alpine Region

中国化学会第二十五届学术年会

作者： anders Blom Atomistix A/s Juliane Maries vej 30 Copenhagen O Denmark Dr.

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Journal of Geographic Information system 2018年第1期10卷 111-141页

作者： Linda Aune-Lundberg anders Bryn Division of survey and statistics Norwegian Institute of Bioeconomy Research Troms&#248 Norway Division of survey and statistics Norwegian Institute of Bioeconomy Research &#197 s Norway Natural History Museum University of Oslo Oslo Norway

Vegetation mapping using field surveys is expensive. Distribution modelling, based on sample surveys, might overcome this challenge. We tested if models trained from sample surveys could be used to predict the distribution of vegetation types in neighbourhood areas, and how reliable the spatial transferability was. We also tested whether we should use ecological dissimilarity or spatial distance to foresee modelling performance. Maximum entropy models were run for three vegetation types based on a vegetation map within a mountain range. Environmental variables were selected backwards, model complexity was kept low. The models are based on points from a small part of each study site, transferred into the entire sites, and then tested for performance. Environmental distance was tested using principle component analysis. All models had high uncorrected AUC values. The ability to predict presences correctly was low. The ability to predict absences correctly was high. The ability to transfer the distribution model depended on environmental distance, not spatial distance.

关键词： Area Frame survey Ecological Distance GIs Independent Evaluation Data Maximum Entropy Modelling Vegetation Mapping

A cis-Regulatory sequence Acts as a Repressor in the Arabidopsis thaliana sporophyte but as an Activator in Pollen

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Molecular Plant 2017年第5期10卷 775-778页

作者： Robert D. Hoffmann Lene I. Olsen Jeppe O. Husum Jesper s. Nicolet Jens F.B. Thøfner anders P. Wätjen Chukwuebuka V. Ezike Michael Palmgren Department of Plant and Environmental sciences University of Copenhagen Thorvaldsensvej 40 1871 Frederiksberg C Denmark Department of Plant and Environmental sciences Center for Membrane Pumps in Cells and Disease - PUMPKIN Danish National Research Foundation University of Copenhagen 1871 Frederiksberg C Denmark

Dear Editor, Flowering plants undergo a life cycle in which the diploid sporo- phyte constitutes the predominant generation, and the haploid male and female gametophytes are reduced to only a few but highly specialized cells （McCormick, 1993）. To achieve expression restricted to certain cell types, genes are not only actively expressed in these cells, they might also be repressed elsewhere. Here, we report that deleting an 88-base-pair （bp） promoter sequence of the pollen-specific gene ACA7 redirects its expression to the sporophyte.

关键词： Flowering plants life cycle diploid sporophyte constitutes

Availability of elements for heterogeneous catalysis: Predicting the industrial viability of novel catalysts

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Chinese Journal of Catalysis 2018年第1期39卷 16-26页

作者： anders B. Laursen Jens sehested Ib Chorkendorff Peter C. K. Vesborg Department of Physics Technical University of DenmarkFysikvej bygn.307DK‐2800 Kgs.LyngbyDenmark Haldor Topsoe A/s Haldor Topsoe Alle 1DK乚2800 Kgs.LyngbyDenmark

Growing concern regarding the sustainability of the chemical industry has driven the developmentof more efficient catalytic ***‐generation estimates of catalyst viability are based oncrustal abundance,which has severe ***,we propose a second‐generation approachto predicting the viability of novel catalysts prior to industrial implementation to benefit the globalchemical *** this prediction,we found that a correlation exists between catalyst consumptionand the annual production or price of the catalyst element for11representative industrialcatalytic *** on this correlation,we have introduced two new descriptors for catalystviability,namely,catalyst consumption to availability ratio per annum(CCA)and consumed catalystcost to product value ratio per annum(CCP).Based on evaluations of CCA and CCP for selected industrial reactions,we have grouped catalysts from the case studies according to viability,allowing the identification of general limits of viability based on CCA and *** the CCA and CCP and their comparing with the general limits of viability provides researchers with a novel framework for evaluating whether the cost or physical availability of a new catalyst could be *** have extended this analysis to calculate the predicted limits of economically viable production and product cost for new catalysts.?2018,Dalian Institute of Chemical Physics,Chinese Academy of *** by Elsevier *** rights reserved.

关键词： Heterogeneous catalysis Industrial catalysis sustainability Element availability Catalyst Catalyst design Element abundance scalability

Metabolic programming determines the lineage-differentiation fate of murine bone marrow stromal progenitor cells

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Bone Research 2019年第4期7卷 410-423页

作者： Michaela Tencerova Elizabeth Rendina-Ruedy Ditte Neess Nils Faergeman Florence Figeac Dalia Ali Morten Danielsen anders Haakonsson Clifford J.Rosen Moustapha Kassem Department of Molecular Endocrinology University of Southern Denmark and Odense University Hospital5000 OdenseDenmark Center for Molecular Medicine Maine Medical Center Research InstituteScarboroughME 04074USA Villum Center for Analytical Biosciences Department of Biochemistry and Molecular BiologyUniversity of Southern Denmark5230 OdenseDenmark MsOmics 2950 CopenhagenDenmark Department of Cellular and Molecular Medicine Novo Nordisk Foundation Center for Stem Cell Biology(DanStem)University of Copenhagen2200 CopenhagenDenmark

Enhanced bone marrow adipogenesis and impaired osteoblastogenesis have been observed in obesity,suggesting that the metabolic microenvironment regulates bone marrow adipocyte and osteoblast progenitor differentiation *** determine the molecular mechanisms,we studied two immortalized murine cell lines of adipocyte or osteoblast progenitors(BMsCs^adipo and BMsC^sosteo,respectively)under basal and adipogenic culture *** baseline,BMsCs^adipo,and BMsCs^osteo exhibit a distinct metabolic program evidenced by the presence of specific global gene expression,cellular bioenergetics,and metabolomic signatures that are dependent on insulin signaling and glycolysis in BMsCs^osteo versus oxidative phosphorylation in BMsCs^*** test the flexibility of the metabolic program,we treated BMsCsadipo with parathyroid hormone,s961(an inhibitor of insulin signaling)and oligomycin(an inhibitor of oxidative phosphorylation).The treatment induced significant changes in cellular bioenergetics that were associated with decreased adipocytic ***,12 weeks of a high-fat diet in mice led to the expansion of adipocyte progenitors,enhanced adipocyte differentiation and insulin signaling in cultured *** data demonstrate that BMsC progenitors possess a distinct metabolic program and are poised to respond to exogenous metabolic cues that regulate their differentiation fate.

关键词： progenitor impaired programming

Poly-I:C Decreases Dendritic Cell Viability Independent of PKR Activation

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Journal of Immune Based Therapies, Vaccines and Antimicrobials 2012年第1期1卷 1-6页

作者： Hjalte List Larsen anders Elm Pedersen University of Copenhagen

Vaccination with tumor-antigen pulsed, monocyte-derived dendritic cells (DCs) has emerged as a promising strategy in cancer immunotherapy. The standard DC maturation cocktail consists of a combination of tumor necrosis factor-α (TNF-α)/interleukin (IL)-1β/IL-6 and prostaglandin E2 (PGE2) for generation of standard DCs (sDCs). In order to improve IL-12p70 production and cytotoxic T-lymphocyte (CTL) induction, a novel cocktail composed of TNF-α/IL-1β/ interferon (IFN)-α/IFN-γ and polyinosinic:polycytidylic acid (Poly-I:C) has been introduced to generate so-called α-Type-1 polarized DCs (αDC1s). We and others have previously performed a comprehensive comparison of sDCs and αDC1s. Here we demonstrate that the viability of αDC1s is lowered compared to sDCs and that DC apoptosis is mediated by Poly-I:C. We speculated that activation of protein kinase R (PKR) could mediate the observed apoptosis, but despite significantly higher PKR expression in αDC1s compared to sDCs and induction of active threonine (Thr)446 autophosphorylation of PKR in αDC1s, Poly-I:C did not influence total PKR expression or autophosporylation, indicating PKR-independent Poly-I:C-induced DC apoptosis.

关键词： Cancer Immunotherapy Dendritic Cells Poly-I:C PKR