检索结果-南通市图书馆

Comparison of Perovskite Systems Based on AFeO_(3)(A=Ce,La,Y)in CO_(2) Hydrogenation to CO

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Transactions of Tianjin University 2024年第4期30卷 337-358页

作者： anna n.Matveyeva Shamil O.Omarov Laboratory of Materials and Processes for Hydrogen Energy Ioff e Institute194021 St.PetersburgRussia

CO_(2) is the most cost-eff ective and abundant carbon resource,while the reverse water-gas reaction(rWGS)is one of the most eff ective methods of CO_(2) *** work presents a comparative study of rWGS activity for perovskite systems based on AFeO_(3)(where A=Ce,La,Y).These systems were synthesized by solution combustion synthesis(SCS)with diff erent ratios of fuel(glycine)and oxidizer(φ),diff erent amounts of nH 4 nO_(3),and the addition of alumina or silica as *** techniques,including X-ray diff raction analysis,thermogravimetric analysis,Fourier transform infrared spectroscopy(FTIR),scanning electron microscopy,energy-dispersive X-ray spectroscopy,n 2-physisorption,H_(2) temper-ature-programmed reduction,temperature-programmed desorption of H_(2) and CO_(2),Raman spectroscopy,and in situ FTIR,were used to relate the physicochemical properties with the catalytic performance of the obtained *** specifi c perovskite-containing system(either bulk or supported)has its own optimalφand nH_(4) nO_(3) amount to achieve the highest yield and dispersion of the perovskite *** all synthesized systems,bulk SCS-derived La-Fe-O systems showed the highest resistance to reducing environments and the easiest hydrogen desorption,outperforming La-Fe-O produced by solgel combustion(SGC).CO_(2) conversion into CO at 600°C for bulk ferrite systems,depending on the A-cation type and preparation method,follows the order La(SGC)nces in properties between La-Fe-O obtained by the SCS and SGC methods can be attributed to diff erent ratios of oxygen and lanthanum vacancy contributions,hydroxyl coverage,morphology,and free iron oxide *** situ FTIR data revealed that CO_(2) hydrogenation occurs through formates generated under reaction conditions on the bulk system based on La-Fe-O,obtained by the SCS method.γ-Al_(2)O_(3) improves the dispersion of CeFeO_(3) and LaFeO_(3) phases,the specifi c surface area,and the quant

关键词： Perovskites LaFeO_(3) CeFeO_(3) YFeO_(3) Solution combustion synthesis CO_(2) hydrogenation Reverse water–gas reaction(rWGS)

Hard life for sons in the nest?Sex-dependent offspring mortality in Great Tits in urban and forest areas

在线全文

学校读者我要写书评

暂无评论

Avian Research 2024年第1期15卷 91-97页

作者： nora Agh Henriett anna Dalvári Krisztián Szabó Ivett Pipoly András Liker HUn-REn-PE Evolutionary Ecology Research Group University of PannoniaH-8200VeszpremPf.1158.Hungary Behavioral Ecology Research Group Center for Natural SciencesUniversity of PannoniaH-8200Pf.1158.VeszpremHungary Molecular Ecology Research Group Department of EcologyUniversity of Veterinary Medicine BudapestH-1400Pf.2.BudapestHungary Synlab Hungary Ltd. H-1211Weiss Manfr´ed Str.5-7BudapestHungary

Sex-biased mortality can occur in birds during development,for example due to sexual differences in energy requirement and/or environmental sensitivity,or the effects of sex hormones or sex differences in the expression of mutations linked to sex *** extent of sex-bias in mortality may also be related to environmental conditions that influence offspring development and *** areas often provide poorer conditions for nestling development resulting in higher offspring mortality compared to natural areas,which may accelerate sex differences in offspring mortality in *** test this hypothesis,we examined the sex ratio of dead offspring in Great Tits(Parus major),using 427 samples of unhatched eggs and dead nestlings collected in two urban and two forest sites between 2013 and *** ratio of males in the whole sample of dead offspring(56.9%)was significantly higher than expected by an 1:1 ratio,and the strongest sex biases were detected in urban areas(57.6%males)and in young nestlings(ng did not differ significantly among study sites and between offspring developmental stages.29.3%of unhatched eggs contained a visible embryo,and the proportion of embryo-containing unhatched eggs did not differ significantly between urban and forest study *** results suggest male-biased offspring mortality in Great Tits,and highlight the need of large datasets to detect subtle differences between habitats and developmental stages.

关键词： Great Tit Urbanization nestling mortality Sex related differences

Structural changes in the obese brain

在线全文

学校读者我要写书评

暂无评论

neural Regeneration Research 2024年第12期19卷 2561-2562页

作者： anna R.R.Da Conceicao Marcelo n.n.Vieira Fernanda G.De Felice D’Or Institute for Research and Education Rio de JaneiroBrazil Institute of Medical Biochemistry Leopoldo De Meis Federal University of Rio de JaneiroRio de JaneiroBrazil Centre for neuroscience Studies Department of Biomedical and Molecular Sciences&Department of PsychiatryQueen’s UniversityKingstonONCanada

Obesity represents a major global health concern,with widespread growing prevalence and severe consequences for the quality of life and life expectancy of affected individuals and for the economic burden of healthcare systems(Prospective Studies Collaboration,2009).Obesity is a well-established risk factor for a variety of conditions including metabolic,vascula r,and heart diseases,and seve ral types of cancer(Prospective Studies Collaboration,2009).

关键词： diseases consequences prevalence

Determination of riding comfort on cycleways using a smartphone application

在线全文

学校读者我要写书评

暂无评论

Journal of Traffic and Transportation Engineering(English Edition) 2024年第4期11卷 747-760页

作者： anna niska Leif Sjögren Peter Andrén Christian Weber Tineke de Jong Aslak Fyhri Department of Infrastructure Maintenance Swedish National Road and Transport Research Institute(VTI)Linköping SE-58195Sweden Department of Safety and Behavior Institute of Transport EconomicsGaustadalleen 210349 OsloNorway

Well maintained cycleways will encourage more people to cycle,as the condition of cycleways is important for the safety,accessibility and riding comfort of *** that,only a few models used to describe the quality of service for cyclists take the surface condition into *** measuring methods are needed to enable reliable and effective assessment of surface conditions,and measurable performance criteria related to the needs of cyclists should be *** purpose of this study has been to test the reliability and validity of using accelerometers in smartphones to assess the riding comfort on cycleways.A smartphone application converting three-dimensional accelerometer measurements into a single indicator for cycleways has been used to assess road surfaces in two field studies,in Sweden and norway,*** studies assessed test sections of varying *** relate the measurements to subjective riding comfort assessments by cyclists,recruited cyclists collected quantitative data using the app,whilst also rating their perceived riding comfort by completing a *** were also related to standard road surface condition indicators,generated from a road surface tester equipped with 19 laser sensors:international roughness index(IRI),mega-and *** results show that it is possible to describe the unevenness of a cycleway using the technology present in smartphones.A software application can be used to collect and analyse data from the acceleration sensors in the phone,which can then be used to describe the riding comfort of *** is mainly the unevenness in the 50-1000 mm sizerange that create the greatest discomfort for cyclists,and intermittent vibrations are perceived as more uncomfortable than more evenly distributed ***,IRI is not a relevant measurement for describing the riding comfort of cyclists.

关键词： Cyclist Comfort Assessment Road surface measurement Smartphone application

Double-check in Lizard Age Estimation:Use of Phalanx Bone and Keratin Claw Sheath Lamellas

在线全文

学校读者我要写书评

暂无评论

Asian Herpetological Research 2024年第1期15卷 59-61页

作者： Eduard GALOYAn natalia SOPILKO anna KOVALYEVA anna CHAMKInA A.n.Severtsov Institute of Ecology and Evolution Moscow 119071Russia Lomonosov Moscow State University Leninskie Gori 1Moscow 119991Russia

Dear Editor,The problem of age estimation in amphibians and reptiles with annual fluctuations of growth pattern has been considered to be mostly solved since the skeletochronological method was introduced(Kleinenberg and Smirina,1969).This method is based on counting the number of lines of arrested growth(LAGs)—cyclical growth marks that are usually formed annually and characterized by different optical aspects within the tubular bones.

关键词： estimation method usual

The neglect of nonnative orthopterans as potential invaders:A call for awareness

在线全文

学校读者我要写书评

暂无评论

Insect Science 2024年第4期31卷 994-1000页

作者： anna K.Kulessa Paride Balzani Ismael Soto Antonín Kouba David Renault Ali Serhan Tarkan Phillip J.Haubrock Ruhr University Bochum Faculty of Biology and BiotechnologyBochumGermany Faculty of Biology University of Duisburg-EssenUniversitätsstraße 5EssenGermany Faculty of Fisheries and Protection of Waters South Bohemian Research Center of Aquaculture and Biodiversity of HydrocenosesUniversity of South Bohemia in CˇeskéBudeˇjoviceVodnˇanyCzech Republic University of Rennes CNRSECOBIO(EcosystèmesBiodiversitéEvolution)UMRRennesFrance Faculty of Fisheries Department of Basic SciencesMu˘gla SıtkıKoçman UniversityMu˘glaTurkey Department of Life and Environmental Sciences Bournemouth UniversityPooleDorsetUK Faculty of Biology and Environmental Protection Department of Ecology and Vertebrate ZoologyUniversity ofŁodzŁodzPoland Department of River Ecology and Conservation Senckenberg Research Institute and Natural History Museum FrankfurtGelnhausenGermany Center for Applied Mathematics and Bioinformatics Gulf University for Science and TechnologyMubarak Al-AbdullahKuwait

Despite the potential ecological and economic impacts of invasive species,there is a dearth of data on the presence,impacts,and management implications of potentially invasive Orthoptera *** lack of research and inconsistent data,including risk screenings and impact assessments,is especially evident in ***,assessing the status,distribution,and potential threats of nonnative Orthoptera in Europe remains challenging,impeding the development of effective management *** address this gap,we call for increased efforts to collect and curate data on non-native and possibly invasive Orthoptera in *** efforts will improve our understanding of this order’s invasion dynamics,facilitate the identification of priority areas for conservation,and support the development of effective management policies and preventive measures.

关键词： costs cricket damages grasshopper impact research

Unifying concepts in methanogenic,aerobic,and anammox sludge granulation

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Environmental Science and Ecotechnology 2024年第1期17卷 17-30页

作者： Simon Mills anna Christine Trego Marco Prevedello Jo De Vrieze Vincent O’Flaherty Piet n.L.Lens Gavin Collins Microbial Communities Laboratory School of Biological and Chemical SciencesNational University of Ireland GalwayUniversity RoadGalwayH91 TK33Ireland Microbial Ecology Laboratory School of Biological and Chemical Sciences University of GalwayUniversity RoadGalwayH91 TK33Ireland Center for Microbial Ecology and Technology(CMET) Ghent UniversityCoupure Links 653B-9000GentBelgium University of Galway University RoadGalwayH91 TK33Ireland

The retention of dense and well-functioning microbial biomass is crucial for effective pollutant removal in several biological wastewater treatment *** solids retention is often achieved through aggregation of microbial communities into dense,spherical aggregates known as granules,which were initially discovered in the *** granules have since been widely applied in upflow anaerobic digesters for waste-to-energy ***,granular biomass has been applied in aerobic wastewater treatment and anaerobic ammonium oxidation(anammox)*** mechanisms underpinning the formation of methanogenic,aerobic,and anammox granules are the subject of ongoing *** each granule type has been extensively studied in isolation,there has been a lack of comparative studies among these granulation *** is likely that there are some unifying concepts that are shared by all three sludge *** these unifying concepts could allow a unified theory of granulation to be ***,we review the granulation mechanisms of methanogenic,aerobic,and anammox granular sludge,highlighting several common concepts,such as the role of extracellular polymeric substances,cations,and operational parameters like upflow velocity and shear *** have then identified some unique features of each granule type,such as different internal structures,microbial compositions,and quorum sensing ***,we propose that future research should prioritize aspects of microbial ecology,such as community assembly or interspecies interactions in individual granules during their formation and growth.

关键词： Granule Granulation Anaerobic digestion Anammox Aerobic granule

Green synthesis of biocompatible Gd^(3+)-doped ultrasmall carbon-based nanohybrids from coffee wastes

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Carbon Resources Conversion 2024年第2期7卷 64-73页

作者： Konstantin Paliienko anna Topchylo Sergei Alekseev Alain Géloën Yurii Milovanov Tetiana Lysenko Valeriy Skryshevsky Tatiana Borisova Vladimir Lysenko Department of neurochemistry Palladin Institute of BiochemistryNational Academy of Sciences of Ukraine9 Leontovicha strKyiv 01054Ukraine Corporation Science Park Taras Shevchenko University of Kyiv60 Volodymyrska Str.Kyiv 01033Ukraine Institute of High Technologies Taras Shevchenko National University of Kyiv64 Volodymyrska Str.01601 KyivUkraine Faculty of Chemistry Taras Shevchenko National University of Kyiv64 Volodymyrska Str.01601 KyivUkraine UMR Ecologie Microbienne Lyon(LEM) CNRS 5557INRAE 1418Claude Bernard University of LyonVetAgro SupResearch Team“Bacterial Opportunistic Pathogens and Environment”(BPOE)University of LyonF-69622 VilleurbanneFrance Light Matter Institute UMR-5306Claude Bernard University of Lyon/CNRSUniversitéde Lyon69622 Villeurbanne CedexFrance

A cheap method allowing fabrication of biocompatible,ultra-small(2-10 nm)and fluorescent(λ_(em)=425-500 nm)nanohybrids(nHs)from coffee wastes is *** gadolinium-doped nanohybrids(GDnHs)or gadolinium-free carbon dots(GFCDs)can be synthesized in a domestic microwave oven according to green synthesis *** sizes,chemical composition,impact on proton magnetic resonance relaxation time and optical properties of the GDnHs and GFCDs were studied in details and *** particular,doping of the nHs with Gd^(3+)ions,up to 1.87%w/w of gadolinium per particles’weight,will allow their application for magnetic resonance imaging(MRI).Furthermore,cell culture tests on human adenocarcinomic alveolar basal epithelial cells line(A549)have shown high biocompatibility of the GDnHs and in a wide concentration range 100-1000μg/ml.

关键词： Carbon dots from coffee waste Carbon dots for MRI Gadolinium-doped carbon dots Microwave-assisted synthesis

Solar hydrogen production from electrochemical ammonia splitting powered by a single perovskite solar cell

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2024年第5期92卷 292-295页

作者： anna MBeiler Wenhui Li Alisa Denisiuk Emilio Palomares Antoni Llobet Institute of Chemical Research of Catalonia(ICIQ).Barcelona Institute of Science and Technology(BIST) 43007 TarragonaSpain Catalan Institution for Research and Advanced Studies(ICREA) 08010 BarcelonaSpain Departament de Química Universitat Autònoma de BarcelonaCerdanyola del Vallès08193 BarcelonaSpain

For carbon-free electrochemical fuel formation,the electrochemical cell must be powered by renewable *** solar-powered H_(2) fuel from water typically requires multiple photovoltaic cells and/or junctions to drive the water splitting *** of the lower thermodynamic requirements to oxidize ammonia compared to water,solar cells with smaller open circuit voltages can provide the required potential for ammonia *** this work,a single perovskite solar cell with an open-circuit potential of 1.08 V is coupled to a 2-electrode electrochemical cell employing hybrid electroanodes functionalized with Ru-based molecular *** device is active for more than 30 min,producing n_(2) and H_(2) in a 1:2.9 ratio with 89%faradaic efficiency with no external applied *** work illustrates that hydrogen production from ammonia can be driven by conventional semiconductors.

关键词： Ammonia oxidation Redox catalysis Perovskites Solarfuels Transitionmetal complexes