检索结果-南通市图书馆

Boosting hydrogen and chemicals production through ethanol electro-reforming on Pt-transition metal anodes

Journal of Energy Chemistry 2022年第7期31卷 394-406,I0011页

作者： Alberto Rodríguez-Gómez Fernando Dorado paula sánchez Ana Raquel de la Osa Chemical Engineering Department Faculty of Chemical Sciences and TechnologyUniversity of Castilla-La Mancha

The aim of this work is to boost the combined hydrogen and added-values compounds generation(acetaldehyde, acetic acid and ethyl acetate) through ethanol electrochemical reforming using bimetallic anodes. In particular, the influence of the secondary metal on the electrochemical performance as well as on the product distribution was studied. For that purpose, Pt X/C electrocatalysts(where X corresponds to Cu, Co, Ni and Ru) were synthesized by the modified polyol method and tested in both half-cell and proton exchange membrane(PEM) cell configurations. Characterization results showed that incorporation of Ni and Co into the Pt matrix enhances the morphological properties of the material, providing smaller crystallite sizes, higher active surface areas and hence, better dispersion when comparing to Ru and Cu-based electrocatalysts. Ethanol oxidation reaction(EOR) was evaluated by cyclic, linear voltammetry and chronopotentiometry assays. Pt Co/C and Pt Ni/C exhibited the highest electrocatalytic activity at high polarization levels, which translate into an improvement of more than 30%(up to 1050 m A cm^(-2)) in the hydrogen production and chemical yields. On the other hand, Pt Ru/C results more advantageous for a lower potential interval(spite sacrificing ethanol conversion. Pt Cu/C presented the lowest results in both electrochemical performance and product distribution. such differences in the electrochemical performance can be rationalized in terms of the synergistic effect between both metals(particle size distribution, grade of dispersion and hydrophilic behavior), which demonstrate that the incorporation of a different secondary metal plays an essential role in the EOR development.

关键词： Ethanol electrochemical reforming Bimetallic anodic electrocatalysts PEM cell High current performance Hydrogen Chemicals production

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Biomass gasification,catalytic technologies and energy integration for production of circular methanol:New horizons for industry decarbonisation

引用

Journal of Environmental sciences 2024年第6期140卷 306-318页

作者： Luis F.Bobadilla Lola Azancot Miriam González-Castañ Estela Ruíz-López Laura Pastor-Pérez Francisco J.Durán-Olivencia Runping Ye Katie Chong paula HBlanco-sánchez Zenthao Wu Tomás R.Reina JoséA.Odriozola Departamento de Química Inorgánica e Instituto de Ciencia de Materiales de sevilla Centro Mixto CSIC-Universidad de SevillaAvda.Américo Vespucio 49Sevilla 41092Spain Departamento de Ingeniería Universidad Loyola AndalucíaAvda.de Las Universidades s/nSevilla 41704Spain Key Laboratory of Jiangxi Province for Environment and Energy Catalysis School of Chemistry and Chemical EngineeringNanchang UniversityNanchang330031China Energy and Bioproducts Research Institute(EBRI) Aston UniversityBirminghamB47ETUnited Kingdom Department of Chemical and Process Engineering University of SurreyGuildfordGU27XHUnited Kingdom

The Intergovernmental Panel on Climate Change(IPCC)recognises the pivotal role of renewable energies in the future energy system and the achievement of the zero-emission *** implementation of renewables should provide major opportunities and enable a more secure and decentralised energy supply *** fuels provide long-term solutions for the transport sector,particularly for applications where fuels with high energy density are *** addition,it helps reducing the carbon footprint of these sectors in the *** on biomass characteristics feedstock is essential for scaling-up gasification from the laboratory to *** review deals with the transformation biogenic residues into a valuable bioenergy carrier like biomethanol as the liquid sunshine based on the combination of modified mature technologies such as gasification with other innovative solutions such as membranes and microchannel *** abatement is a critical process in product gas upgrading since tars compromise downstream processes and equipment,for this,membrane technology for upgrading syngas quality is discussed in this *** reactor technology with the design of state-of-the-art multifunctional catalysts provides a path to develop decentralised biomethanol synthesis from biogenic ***,the development of a process chain for the production of(i)methanol as an intermediate energy carrier,(ii)electricity and(iii)heat for decentralised applications based on biomass feedstock flexible gasification,gas upgrading and methanol synthesis is analysed.

关键词： Biogenic residues Gasification Biomethanol Circular Economy Microreactors

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

在腐植酸存在的条件下动态模拟铜在贻贝类体内的富积

引用

腐植酸 2018年第1期 48-48页

作者： paula sánchez-Marín Eneko Aierbe J.Ignacio Lorenzo 袁晓娜(译) 不详中国腐植酸工业协会

依据金属生物利用度模型，腐植酸对铜的络合作用有望降低水生生物对铜的生物利用度，就如生物配体模型（BLM）。这个模型在海洋无脊椎动物胚胎或是微藻类等不进食生物中得到了证实。但对于像紫贻贝等滤食性生物体，在腐植酸存在的条件... 详细信息

依据金属生物利用度模型，腐植酸对铜的络合作用有望降低水生生物对铜的生物利用度，就如生物配体模型（BLM）。这个模型在海洋无脊椎动物胚胎或是微藻类等不进食生物中得到了证实。但对于像紫贻贝等滤食性生物体，在腐植酸存在的条件下铜的富积较高，表明摄取的铜-腐植酸复合物可被吸收。

关键词：腐植酸动态模拟生物利用度富积体内贝类铜体模型

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

3D City Models as a Visual support Tool for the Analysis of Buildings seismic Vulnerability: The Case of Lisbon

引用

International Journal of Disaster Risk science 2017年第3期8卷 308-325页

作者： paula Redweik paula Teves-Costa Inês Vilas-Boas Teresa santos Instituto Dom Luiz Faculdade de CiênciasUniversidade de Lisboa EsRI Portugal CICs.NOVA–Centro Interdisciplinar de Ciências sociais Faculdade de Ciências Sociais e HumanasUniversidade Nova de Lisboa

3D city models associate a database of a city to a rigorous geospatial representation that is close to the visible reality by combining appearance, geometry, and semantics. As such, these models may include tools that convey attribute analysis, not only at the statistical level but also in terms of visual appearance of the objects, thus allowing the generation of new knowledge about a phenomenon or its effects. Lisbon is a city with a moderate level of seismic risk, and has been hit in the past by strong earthquakes. several seismic vulnerability studies of buildings have been carried out in Lisbon. These studies generate different scenarios that consider the magnitude and source location of potential earthquakes. The results of these studies were presented as maps obtained from crossing information contained in 2D layers and presented in a GIs environment. In the present study a seismic vulnerability assessment of Lisbon's buildings held in 2D is extended to the third dimension, which refines the resolution and the set of parameters and explores the gains of spatial analysis in 3D representations. The numerous parameters that contribute to assess seismic vulnerability of buildings may be analyzed individually or simultaneously as well as in multiple seismic scenarios. Although covering all residential buildings in Lisbon, the application of the 3Dcity model is demonstrated with more detail in three pilot areas.

关键词： 3D-GIs 3D models Building vulnerability Lisbon seismic scenarios

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Aberrant Th2 inflammation drives dysfunction of alveolar macrophages and susceptibility to bacterial pneumonia

引用

Cellular & Molecular Immunology 2018年第5期15卷 480-492页

作者： Emily K Moser Natania s Field paula M Oliver Cell Pathology Division Children’s Hospital of PhiladelphiaPhiladelphiaPA 19104USA Cell and Molecular Biology Program Perelman School of MedicineUniversity of PennsylvaniaPhiladelphiaPA 19104USA Department of Pathology and Laboratory Medicine University of PennsylvaniaPhiladelphiaPA 19104USA

The ubiquitin ligase,Itch,is required to prevent autoinflammatory disease in mice and ***-deficient mice develop lethal pulmonary inflammation characterized by the production of Th2 cytokines(for example,interleukin-4(IL-4));however,the contribution of Itch to immune defense against respiratory pathogens has not been *** found that Itch-deficient mice were highly susceptible to intranasal infection with the respiratory pathogen Klebsiella *** Itch-deficient mice exhibited increased immune cell infiltration,cytokine levels and bacterial burden in the respiratory tract compared with control ***,numbers of resident alveolar macrophages were reduced in the lungs from Itch-deficient mice both before and after *** levels of Th2 cytokines in the respiratory tract correlated with deceased alveolar macrophages,and genetic ablation of IL-4 restored alveolar macrophages and host defense to *** in Itch-deficient mice,suggesting that loss of alveolar macrophages occurred as a consequence of Th2 *** transfer of Itch−/−CD4+T cells into Rag−/−mice was sufficient to drive reduction in numbers of Itch-replete alveolar ***,we found that stat6 signaling downstream of the IL-4 receptor directly reduced fitness of alveolar macrophages when these cells were exposed to the Itch−/−inflamed respiratory *** data suggest that Th2 inflammation directly impairs alveolar macrophage fitness in Itch−/−mice,and elucidate a previously unappreciated link between Th2 cells,alveolar macrophages and susceptibility to bacterial infection.

关键词： alveolar macrophage bacterial pneumonia Itch Th2 cell

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

serological surveillance for sARs-CoV-2 antibodies among students,faculty and staff within a large university system during the pandemic

引用

World Journal of Virology 2025年第1期14卷 99-107页

作者： Marcos G Pinheiro Gabriela G O Alves Maria Eduarda R Conde sofia L Costa Regina C s sant’Anna Isa M F Antunes Mônica C Carneiro Fabio s Ronzei Julia C scaffo Felipe R Pinheiro Lialyz s Andre Helvecio C Povoa Valéria T Baltar Fabíola Giordani Eduarda s Hemerly Gisele C Alexandre Karla C de paula Márcio Watanabe Antonio Claudio L da Nóbrega Jackeline Christiane P Lobato Fabio Aguiar-Alves Laboratory of Molecular Epidemiology and Biotechnology Rodolpho Albino University LaboratoryFluminense Federal UniversityNiterói 24241000Rio de JaneiroBrazil Estácio de sáUniversity Nova Friburgo 28611135Rio de JaneiroBrazil Pathology Program Medicine schoolFluminense Federal UniversityNiterói 24070090Rio de JaneiroBrazil Department of Pharmaceutical sciences Lloyd L.Gregory School of PharmacyPalm Beach Atlantic UniversityWest Palm BeachFL 33401United States Health Institute of Nova Friburgo Fluminense Federal UniversityNova Friburgo 28613001Rio de JaneiroBrazil Department of Epidemiology and Biostatistics Institute of Collective Health(ISC)Fluminense Federal UniversityNiterói 24033900Rio de JaneiroBrazil Institute of Physical Education Fluminense Federal UniversityNiterói 24020005Rio de JaneiroBrazil Department of statistics Fluminense Federal UniversityNiterói 24210200Rio de JaneiroBrazil Department of Physiology and Pharmacology Fluminense Federal UniversityNiterói 24210130Rio de JaneiroBrazil

BACKGROUND At the end of December 2019,the world faced severe acute respiratory syndrome-coronavirus 2(sARs-CoV-2),which led to the outbreak of coronavirus disease 2019(COVID-19),associated with respiratory *** virus has shown significant challenges,especially for senior citizens,patients with other underlying illnesses,or those with a sedentary *** tests conducted early on have helped identify how the virus is transmitted and how to curb its *** study hypothesis was that the rapid serological test for sARs-CoV-2 antibodies could indicate the immunoreactive profile during the COVID-19 pandemic in a university *** To conduct active surveillance for serological expression of anti-sARs-CoV-2 antibodies in individuals within a university setting during the COVID-19 *** This sectional study by convenience sampling was conducted in a large university in Niteroi-RJ,Brazil,from March 2021 to July *** study population consisted of students,faculty,and administrative staff employed by the university.A total of 3433 faculty members,60703 students,and 3812 administrative staff were invited to *** were gathered through rapid serological tests to detect immunoglobulin(Ig)M and IgG against ***χ²or Fisher's exact test was used to conduct statistical analysis.A 0.20 significance level was adopted for variable selection in a multiple logistic regression model to evaluate *** A total of 1648 individuals were enrolled in the *** proportion of COVID-19 positivity was 164/1648(9.8%).The adjusted logistic model indicate a positive association between the expression of IgM or IgG and age[odds ratio(OR)=1.16,95%CI:1.02-1.31](Ps who had been in contact with a COVID-19-positive case(OR=3.49,95%CI:2.34-5.37)(Pse who had received the COVID-19 vaccine(OR=2.33,95%CI:1.61-3.35)(Psocial isolation(OR=0.59,95%CI:0.41-0.84)(Psho

关键词： serological surveillance sARs-CoV-2 antibodies COVID-19 serological rapid test Risk factors for COVID-19

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

soil organic carbon storage in forest restoration models and environmental conditions

引用

Journal of Forestry Research 2022年第4期33卷 1123-1134页

作者： Ranieri Ribeiro paula Miguel Calmon Maria Leonor Lopes-Assad Eduardo de sáMendonça Departamento de Agronomia Programa de Pós-Graduação em Produção VegetalUniversidade Federal do Espírito SantoAlto UniversitárioGuararemaAlegreEspírito Santo CEP 29500-000Brazil World Resources Institute SalvadorBahia CEP 40290-040Brazil Departamento de Recursos Naturais e Proteção Ambiental Universidade Federal de São CarlosArarasSão Paulo CEP 13600-970Brazil

The scale of forest and landscape restoration is expected to increase during the UN Decade on Ecosystem Restoration and its contribution to the provision of critical ecosystem services to *** models of forest restoration may improve ecosystem services,including soil organic carbon(sOC)storage.A review was carried out to access:(1)the variability of sOC storage between worldwide forest restoration models and,(2)the effects of climate,soil class,soil texture,and vegetation type on sOC *** reviewed 119 primary studies with information on sOC and soil texture for different forest restoration *** restoration models were grouped into four categories:natural regeneration,monocultures,agroforestry,and mixed *** data was extracted from these four restoration models,other land uses(cropland,bare land,grassland,and natural forest),climate regimes,and soil *** sOC storage in the forest restoration models and other land uses at a global scale ranged between 0.1 to 514 Mg ha^(-1).The overall mean value for sOC storage was higher for natural regeneration(112 Mg ha^(-1)),followed by agroforestry(74 Mg ha^(-1)),mixed forest(73 Mg ha^(-1)),and monocultures(68 Mg ha^(-1)).However,the average sOC storage was similar among the four restoration models in the moist warm climate *** sOC storage mean value in the moist cool zone was 23%higher than the dry cool zone(81 and 62 Mg ha^(-1),respectively),and 50%higher for the moist warm zone when compared to the dry warm climatic zone(74 and 38 Mg ha^(-1),respectively).The sOC storage of the restoration models was positively related to soil depth(0.59;pstand age(0.17;ps of sOC storage were 26,66,and 139 Mg ha^(-1) at zero-10,zero-30,and zero-100 cm depths,*** addition,sandy soils showed smaller mean values of sOC storage than medium to clay soils,especially in deeper soil ***,sOC storage was positively re

关键词： Forest restoration Land uses soil type soil texture Climate

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

E2F transcription factors and their complementary roles during DNA damage responses

引用

Molecular Plant 2023年第9期16卷 1373-1375页

作者： paula Casati Centro de Estudios Fotosinteticos y Bioquimicos(CEFOBl) Universidad Nacional de RosarioSuipacha 5312000 RosarioArgentina

E2F transcription factors(TF)comprise a family of proteins that regulate the expression of genes required for s-phase progression,among *** genome encodes six E2F TFs(E2FA–F),which are classified as typical(E2FA–C)and atypical(E2FD–F)depending on their ability to interact with two DP interaction proteins(DPa and DPb)(sablowski and Gutierrez,2022).While E2FA–C need to heterodimerize with either DPa or DPb to function,E2FD–F act independently of DP ***,the retinoblastoma-related1(RBR1)protein also binds and inhibits the typical E2F/DP TF complexes when bound to the promoter of genes,repressing their expression in the absence of a signal to enter a new cell *** general,E2FA and E2FB are considered transcriptional activators,while E2FC is generally considered a repressor of cell proliferation(sablowski and Gutierrez,2022).In addition,it is well documented that E2FB at least,and probably E2FA,can also stimulate the G2/M transition.

关键词： damage E2F complementary

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

The relationship between morphology and flight in Drosophila:a study of two pairs of sibling species from a natural population

引用

Insect science 2024年第3期31卷 885-900页

作者： Nicolás Flaibani Victoría Estefania Ortiz Juan JoséFanara Valeria paula Carreira Laboratorio de Evolucion Departamento de EcologiaGenética y Evolucion(DEGE)Facultad de Ciencias Exactas y Naturales(FCEN)Universidad de Buenos Aires(UBA)Instituto de GenéticaEcologia y Evolucion de Buenos Aires(IEGEBA)Consejo Nacional de Investigaciones Cientificasy Tecnicas(CONICET)-UBABuenos AiresArgentina

Insect flight is a complex trait involved in different behaviors,from the search for sexual partners,food,or breeding *** studies have postulated the adaptive advantages of certain morphological traits in relation to increased flight capacity,such as low values of wing loading or high values of wing:thorax ratio and wing-aspect ***,few studies have evaluated the relationship between variables related to flight and morphological traits in *** work aimed to study morphological traits in males and females of two pairs of sibling species:Drosophila buzzati Patterson and Wheeler-Drosophila koeferae Fontdevila and Wasserman,and Drosophila melanogaster Meigen-Drosophila simulans sturtevant,and to analyze its relationship with *** detected the highest proportion of flight time in *** and *** compared to *** and ***,*** results also revealed sexual dimorphism,with males exhibiting a higher proportion of flight time than ***,we did not find a general pattern to explain the relationship between morphology and the proportion of flight time because associations varied depending upon the analyses(considering all groups together or each sex-species combination separately).Moreover,these associations explained a low percentage of variation,suggesting that other nonmorphological components related to flight,such as physiological variables,should be taken into *** work allowed us to show the variability and complexity of an aspect of flight,suggesting that the adaptive role of the morphological traits studied might have been overestimated.

关键词： morphological traits time in flight wing loading wing:thorax ratio wingaspect ratio wing second moment of area

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

species selection in hardwoods research: variations in baseline physiological responses of select temperate hardwood tree species

引用

Journal of Forestry Research 2013年第2期24卷 285-292页

作者： shaneka s. Lawson paula M. Pijut Charles H. Michler UsDA Forest service Northern Research Station Hardwood Tree Improvement and Regeneration Center (HTIRC) Purdue University Department of Forestry and Natural Resources UsDA Forest service Northern Research Station Hardwood Tree Improvement and Regeneration Center (HTIRC)

Drought periods are becoming more extreme worldwide and the ability of plants to contribute towards atmospheric flux is being compromised. Properly functioning stomata provide an exit for water that has been absorbed by the roots, funneled into various cell parts, and eventually released into the atmosphere via transpiration. By observing the effects that weather conditions such as climate change may have on stomatal density, distribution, and functioning, it may be possible to elucidate a portion of the mechanisms trees use to survive longer periods of water stress. This study analyzed stomatal density （sD）, stomatal conductance （gs ）, CO2 assimilation （A）, instantaneous water-use efficiency （WUEi ）, and transpiration （E） rates in six native tree species in the Midwestern UsA and showed that trees within the same ecotype followed similar trends, but that trees within the same family did not when exposed to identical greenhouse conditions. Naturally drought tolerant tree species demonstrated lower g s and higher WUEi , while intolerant species had higher sD. This study showed negative or no correlation between sD and g s , A, E, and WUEi and positive correlations between E and A and gs and E.

关键词： drought water stress stomatal density hardwood trees

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：