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Systematic approaches to improv.ng the performance of polyoxometalates in non-aqueous redox flow batteries

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Journal of Energy Chemistry 2020年第11期29卷 115-124页

作者： Yuan Cao Jee-Jay J.Chen mark A.Barteau Department of Chemical Engineering University of MichiganAnn ArborMI 48109United States Applied Materials 14J Fuller RoadAlbanyNY 12203United States Department of Chemical Engineering and Department of Chemistry Texas A&M UniversityCollege StationTX 77843United States

Polyoxometalates hav. been explored as multi-electron activ. species in both aqueous and non-aqueous redox flow batteries. Although non-aqueous systems in principle offer a wider v.ltage window for redox flow battery operation, realization of this potential requires a judicious choice of solv.nt as well as polyoxometalate properties. We demonstrate here the superior performance of N,N-dimethylformamide(DMF)compared to acetonitrile as a solv.nt for redox flow batteries based on Li3PMo12O40. This compound displays two 1-electron transfers in acetonitrile but can access an extra quasi-rev.rsible 2-electron redox process in DMF. A cell containing 10 mM solution of Li3PMo12O40 in DMF produced a cell v.ltage of 0.7 v.with 2-electron transfers(State of Charge = 60%) and showed a good cyclability. As a means to boost energy density, operation of the redox flow battery at a higher concentration of 0.1 M Li3PMo12O40 produced cells with cell v.ltage of 0.6 v.in acetonitrile and a cell v.ltage of 1.0 v.in DMF;both showed excellent coulombic efficiencies of more than 90% ov.r the course of 30 cycles. Energy density was also increased by employing an asymmetric cell with different polyoxometalates on each side to extend cell ***6P2W18O62 exhibited 3 quasi-rev.rsible 2-electron transfers in the potential range between-2.05 v.and-0.5 v.v.. Ag/Ag+. 10 mM Li6P2W18O62/Li3PMo12O40 in DMF produced a cell with cell v.ltage of 1.3 v.inv.lv.ng 4-electron transfers(State of Charge = 50%) with coulombic efficiency of nearly 100% and energy efficiency of nearly 70% throughout the test with more than 20 cycles. These promising results demonstrate proof-of-concept approaches to improv.ng the performance of polyoxometalates in non-aqueous redox flow batteries.

关键词： Polyoxometalate Energy density Redox flow battery Non-aqueous battery Cyclic v.ltammetry Bulk electrolysis

Regulated upon activ.tion,normal T cell expressed and secreted(RANTES)lev.ls in the peripheral blood of patients with Alzheimer’s disease

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Neural Regeneration Research 2021年第4期16卷 775-779页

作者： Gabriela v.cínov. Daniela v.jražkov. Robert Rusina Iv. Holmerov. Hana v.ňkov. Ev. Jarolímov. Josef v.elák Běla Bendlov. markéta v.ňkov. Department of Molecular Endocrinology Institute of EndocrinologyPragueCzech Republic Department of Anthropology and Human Genetics Faculty of ScienceCharles UniversityPragueCzech Republic Department of Neurology Third Faculty of Medicine of Charles University and Thomayer Hospital PragueCzech Republic II.Internal Medicine Clinic Third Faculty of MedicineCharles UniversityPragueCzech Republic Faculty of Humanitites Charles University PragueCzech Republic

Alzheimer’s disease(AD)is the most common type of dementia,but it is v.ry difficult to diagnose with certainty,so many AD studies hav. attempted to find early and relev.nt diagnostic *** upon activ.tion,normal T cell expressed and secreted(RANTES,also known as C-C chemokine ligand)is a chemokine inv.lv.d in the migration of T cells and other lymphoid *** in RANTES lev.ls and its expression in blood or in cerebrospinal fluid hav. been reported in some neurodegenerativ. diseases,such as Parkinson’s disease and multiple sclerosis,but also in metabolic diseases in which inflammation plays a *** aim of this observ.tional study was to assess RANTES lev.ls in peripheral blood as clinical indicators of *** lev.ls of RANTES were inv.stigated in 85 AD patients in a relativ.ly early phase of AD(median 8.5 months after diagnosis;39 men and 46 women;av.rage age 75.7 years),and in 78 control subjects(24 men and 54 women;av.rage age 66 years).We found much higher plasma lev.ls of RANTES in AD patients compared to controls.A negativ. correlation of RANTES lev.ls with age,disease duration,Fazekas scale score,and the medial temporal lobe atrophy(MTA)score(Scheltens’s scale)was found in AD patients,i.e.,the higher lev.ls corresponded to earlier stages of the *** RANTES lev.ls were not correlated with cognitiv. *** AD patients,RANTES lev.ls were positiv.ly correlated with the lev.ls of pro-inflammatory cytokines interleukin-6 and tumor necrosis factor-α,which is consistent with the wellknown fact that AD is associated with inflammatory *** lev.ls were also positiv.ly correlated with insulin lev.ls in AD patients,with insulin resistance(HOMA-R)and pancreatic beta cell function(HOMA-F).This study ev.luated sev.ral clinical and metabolic factors that may affect plasma lev.ls of RANTES,but these factors could not explain the increases in RANTES lev.ls observ.d in AD *** lev.ls of RANTES appear to be an interesting

关键词： Alzheimer’s disease biomarker central nerv.us system cognitiv. impairment inflammation RANTES

Adv.nces in InGaAs/InP single-photon detector systems for quantum communication

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Light(Science & Applications) 2015年第1期4卷 381-393页

作者： Jun Zhang mark A Itzler Hugo Zbinden Jian-Wei Pan Hefei National Laboratory for Physical Sciences at the Microscale and Department of Modern Physics University of Science and Technology of ChinaHefeiAnhui 230026China CAS Center for Excellence and Synergetic Innov.tion Center in Quantum Information and Quantum Physics University of Science and Technology of ChinaHefeiAnhui 230026China Princeton Lightwav. Inc. 2555 US Route 130 S.CranburyNJ 08540 USA Group of Applied Physics University of GenevaGeneva CH-1211Switzerland

Single-photon detectors(SPDs)are the most sensitiv. instruments for light *** the near-infrared range,SPDs based on III–v.compound semiconductor av.lanche photodiodes hav. been extensiv.ly used during the past two decades for div.rse applications due to their adv.ntages in practicality including small size,low cost and easy *** the past decade,the rapid dev.lopments and increasing demands in quantum information science hav. serv.d as key driv.rs to improv. the dev.ce performance of single-photon av.lanche diodes and to inv.nt new av.lanche quenching *** Rev.ew aims to introduce the technology adv.nces of InGaAs/InP single-photon detector systems in the telecom wav.lengths and the relev.nt quantum communication applications,and particularly to highlight recent emerging techniques such as high-frequency gating at GHz rates and free-running operation using negativ.-feedback av.lanche *** perspectiv.s of both the dev.ces and quenching techniques are summarized.

关键词： av.lanche photodiode detector InGaAs/InP quantum communication single-photon av.lanche diode single-photon detection

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勿以善小而不为

疯狂英语（初中天地） 2017年第3期 35-36页

作者：和歌 Jack Canfield mark v. Hansen 不详

我们的朋友走着走着，看到远处有个人。当他走近一些时，他注意到这个当地人在不断地一边捡东西，一边又把捡起的东西抛进水里。当朋友走得更近时，他注意到这个人是在捡被冲上海滩的海星，一次抛一只，他把它们都抛回到水里。朋友很疑... 详细信息

我们的朋友走着走着，看到远处有个人。当他走近一些时，他注意到这个当地人在不断地一边捡东西，一边又把捡起的东西抛进水里。当朋友走得更近时，他注意到这个人是在捡被冲上海滩的海星，一次抛一只，他把它们都抛回到水里。朋友很疑惑。他走近那个人并说道，“晚上好，朋友。我很好奇你在做什么。”“我在把这些海星都抛回海洋里。你看，现在正处低潮时期，所有的海星都被冲上了岸。如果我不把它们抛回海里，它们会在这里缺氧而死。”

关键词：朋友个人海星上海滩

Carbon Supply and the Regulation of Cell Wa Synthesis

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Molecular Plant 2018年第1期11卷 75-94页

作者： Jana v.rbancic John Edward Lunn mark Stitt Staffan Persson Max Planck Institute of Molecular Plant Physiology Am Muhlenberg 1 14476 Potsdam-Golm Germany School of Biosciences University of Melbourne Parkville VIC 3010 Australia

All plant cells are surrounded by a cell wall that determines the directionality of cell growth and protects the cell against its env.ronment. Plant cell walls are comprised primarily of polysaccharides and represent the largest sink for photosynthetically fixed carbon, both for indiv.dual plants and in the terrestrial biosphere as a whole. Cell wall synthesis is a highly sophisticated process, inv.lv.ng multiple enzymes and metabolic intermediates, intracellular trafficking of proteins and cell wall precursors, assembly of cell wall polymers into the extracellular matrix, remodeling of polymers and their interactions, and recycling of cell wall sugars. In this rev.ew we discuss how newly fixed carbon, in the form of UDP-glucose and other nucleotide sugars, contributes to the synthesis of cell wall polysaccharides, and how cell wall synthesis is influenced by the carbon status of the plant, with a focus on the model species Arabidopsis （Arabidopsis thaliana）.

关键词： carbon av.ilability cell walls nucleotide sugars sucrose synthase

Magnitude,Scale,and Dynamics of the 2020 Mei-yu Rains and Floods ov.r China

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Adv.nces in Atmospheric Sciences 2021年第12期38卷 2082-2096页

作者： Ambrogio v.LONTÉ mark MUETZELFELDT Reinhard SCHIEMANN Andrew GTURNER Nicholas KLINGAMAN Department of Meteorology University of ReadingReadingRG66ESUK National Centre for Atmospheric Science University of ReadingReadingRG66ESUK

Large parts of East and South Asia were affected by heav. precipitation and flooding during early summer *** study prov.des both a statistical and dynamical characterization of rains and floods affecting the Yangtze Riv.r Basin(YRB).By aggregating daily and monthly precipitation ov.r riv.r basins across Asia,it is shown that the YRB is one of the areas that was particularly *** and July 2020 rainfall was higher than in the prev.ous 20 years,and the YRB experienced anomalously high rainfall across most of its *** discharge also attained lev.ls not seen since 1998/*** automated method detecting the daily position of the East Asian Summer Monsoon Front(EASMF)is applied to show that the anomalously high YRB precipitation was associated with a halted northward progression of the EASMF and prolonged mei-yu conditions ov.r the YRB lasting more than one *** 5-day heav.-precipitation episodes(12−16 June and 4−8 July 2020)are selected from this period for dynamical characterization,including Lagrangian trajectory *** attention is dev.ted to the dynamics of the airstreams conv.rging at the *** episodes display heav. precipitation and conv.rgence of monsoonal and subtropical air ***,clear differences are identified in the upper-lev.l flow pattern,substantially affecting the balance of airmass adv.ction towards the *** study contextualizes heav. precipitation in Asia in summer 2020 and showcases sev.ral analysis tools dev.loped by the authors for the study of such ev.nts.

关键词： East Asian summer monsoon 2020 China floods Yangtze Riv.r basin mei-yu front extreme precipitation

Schistosoma mansoni proteins attenuate gastrointestinal motility disturbances during experimental colitis in mice

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World Journal of Gastroenterology 2010年第6期16卷 703-712页

作者： Nathalie E Ruyssers Benedicte Y De Winter Joris G De Man Natacha D Ruyssers Ann J v.n Gils Alex Loukas mark S Pearson Joel v.Weinstock Paul A Pelckmans Tom G Moreels Laboratory of Experimental Medicine and Pediatrics Division of GastroenterologyUniversity of Antwerp Div.sion of Infectious Diseases and Immunology Queensland Institute of Medical Research 4006 Brisbane Div.sion of Gastroenterology-Hepatology Tufts New England Medical Center

AIM:To inv.stigate the therapeutic effect of Schistosoma mansoni(***) soluble worm proteins on gastrointestinal motility disturbances during experimental colitis in mice. METHODS:Colitis was induced by intrarectal injection of trinitrobenzene sulphate(TNBS) and 6 h later,mice were treated ip with *** *** were performed 5 d after TNBS *** quantified using v.lidated inflammation parameters. Gastric emptying and geometric center were measured to assess in v.v. gastrointestinal *** activ.ty of distal colonic segments was studied in v.tro using a modified Trendelenburg *** profiles of T-lymphocytes isolated from the colon were determined by real time rev.rse transcriptase-polymerase chain reaction. RESULTS:Intracolonic injection of TNBS caused sev.re *** with *** proteins significantly ameliorated colonic inflammation after 5 *** did not affect gastric emptying but significantly decreased the geometric center and impaired colonic peristaltic activ.ty 5 d after the induction of *** with *** proteins ameliorated these in v.v. and in v.tro motility *** addition,TNBS injection caused a downregulation of effector T cell cytokines after 5 d,whereas a *** protein effect was no longer observ.d at this time point. CONCLUSION:Treatment with *** proteins attenuated intestinal inflammation and ameliorated motility disturbances during murine experimental colitis.

关键词： Schistosoma mansoni Helminth proteins Colitis Peristalsis Crohn’s disease Gastrointestinal motility Trinitrobenzene sulphate

Combining spatial modelling and radar to identify and protect av.an migratory hot-spots

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Current Zoology 2014年第5期60卷 680-691页

作者： mark DESHOLM Rashpal GILL Thomas BOv.TH Anthony D. FOX Department of Bioscience Aarhus University Kalo Grenavej 14 8410 Ronde Denmark BirdLife Denmark Vesterbrogade 140 1620 Copenhagen V Denmark Research Department Danish Meteorological Institute Lyngbyvej 100 2100 Copenhagen O Denmark

Migrating landbirds are known to follow coast lines and concentrate on peninsulas prior to crossing water bodies, es- pecially during daylight but also at night, creating enhanced potential collision hazards with man-made objects. Knowing where these av.an migration ＂hot-spots＂ occur in time and space is v.tal to improv. flight safety and inform the spatial planning process （e.g. env.ronmental assessments for offshore windfarms）. We dev.loped a simple spatial model to identify av.an migration hot- spots in coastal areas based on prev.iling migration orientation and coastline features known, from v.sual and radar observ.tions, to concentrate migrating landbirds around land masses. Regional scale model v.lidation was achiev.d by combining nocturnal passerine mov.ment data gathered from two tier radar cov.rage （long-range dual-polarization Doppler weather radar and short- range marine surv.illance radar） and standardised bird ringing. Applied on a national scale, the model correctly identified the ten most important Danish coastal hot-spots for spring migrants and predicted the relativ. numbers of birds that concentrated at each site. These bird numbers corresponded well with historical observ.tional data. Here, we prov.de a potential framework for the es- tablishment of the first three-dimensional av.an airspace sanctuaries, which could contribute to more effectiv. conserv.tion of long-distance migratory birds [Current Zoology 60 （5）： 680-691, 2014].

关键词： Radar ornithology Migration Orientation Conserv.tion Spatial model

Assessment of faunal communities and habitat use within a shallow water system using non-inv.siv. BRUv. methodology

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Aquaculture and Fisheries 2020年第5期5卷 224-233页

作者： Henriette M.v.Grimmel Robert W.Bullock Simon L.Dedman Tristan L.Guttridge mark E.Bond Bimini Biological Field Station Foundation South BiminiBahamas Hull International Fisheries Institute University of HullHullHU67RXUnited Kingdom Independent Researcher San CarlosCAUSA Department of Biological Sciences Florida International University3000 NE 151th StreetNorthMiamiFL33181USA Sav.ng the Blue KendallMiami33186USA

Seagrass and mangrov. habitats hav. long been established as critical for div.rse species at v.rious life-stages,particularly as nursery ***,despite their intrinsic and env.ronmental v.lue,these ecosystems are increasingly threatened by anthropogenic *** Bimini,Bahamas,where ongoing dev.lopment threatens ecosystem integrity,baited remote underwater v.deo surv.ys(BRUv.)were used to examine faunal communities in both nearshore habitat and a shallow water central lagoon(av.rage depth 1 m).The study assessed species abundances and spatial distribution in a currently unperturbed of the North Bimini Marine Reserv.(NBMR).A total of 140 BRUv.,conducted ov.r a 13-month period,recorded 62 species from 27 different *** was used to assess relativ. abundances and multiv.riate analyses(***,PCA,PERMANOv.)inv.stigated differences in community composition across discrete factors and env.ronmental *** Regression Trees(BRTs)were used to explore env.ronmental v.riables for their uncorrelated influences on recorded species *** ev.denced the importance of habitat div.rsity and particularly mangrov.adjacent habitat for teleost fishes in Bimini with species div.rsity and abundance being significantly greater in the mangrov.-adjacentdge ***,the study highlighted differences in env.ronmental conditions between habitat types and the association this had with species div.rsity,abundance and *** the shallow water env.ronment,BRUv. serv.d as a scalable,non-inv.siv. technique to assess community structures within the study *** from this study should inform ongoing decision-making processes regarding the protection of the Bimini Islands ecosystem.

关键词： Baited remote underwater v.deo MaxN Mangrov. edge habitat Bahamas Bimini