检索结果-南通市图书馆

Gas-phase electrocatalytic conversion of CO_2 to chemicals on sputtered Cu and Cu–C catalysts electrodes

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

journal of Energy Chemistry 2019年第4期28卷 46-53页

作者： N.Gutiérrez-Guerra J.A.González j.C.Serrano-Ruiz E.López-Fernández j.L.Valverde A.de Lucas-Consuegra Departamento de Ingeniería Química Facultad de Ciencias y Tecnologías Químicas Universidad de Castilla-La Mancha Instituto Regional de Investigación Científica Aplicada (IRICA) and Departamento de Física Aplicada Universidad de Castilla-La Mancha Departamento de Ingeniería Universidad Loyola Andalucía

A novel gas-phase electrocatalytic cell containing a low-temperature proton exchange membrane(PEM)was developed to electrochemically convert CO_2into organic compounds.Two different Cu-based cathode catalysts(Cu and Cu–C)were prepared by physical vapor deposition method(sputtering)and subsequently employed for the gas-phase electroreduction of CO_2at different temperatures(70–90°C).The prepared electrodes Cu and Cu–C were characterized by X-ray diffraction(XRD),X-ray photoemission spectroscopy(XPS)and scanning electron microscopy(SEM).As revealed,Cu is partially oxidized on the surface of the samples and the Cu and Cu–C cathodic catalysts were comprised of a porous,continuous,and homogeneous film with nanocrystalline Cu with a grain size of 16 and 8 nm,respectively.The influence of the applied current and temperature on the electro-catalytic activity and selectivity of these materials was investigated.Among the two investigated electrodes,the pure Cu catalyst film showed the highest CO_2specific electrocatalytic reduction rates and higher selectivity to methanol formation compared to the Cu–C electrode,which was attributed to the higher particle size of the former and lower Cu O/Cu ratio.The obtained results show potential interest for the possible use of electrical renewable energy for the transformation of CO_2into valuable products using low metal loading Cu based electrodes(0.5 mg Cu cm^(-2))prepared by sputtering.

关键词： C02 valorization Electro-reduction Cu catalyst PEM Selectivity Methanol production

Sustainable geotourism using digital technologies along a rural georoute in Monsagro(Salamanca,Spain)

在线全文

学校读者我要写书评

暂无评论

International journal of Digital Earth 2017年第2期10卷 121-138页

作者： A.M.Martínez-Graña L.Serrano J.A.González-Delgado C.j.Dabrio P.Legoinha Department of Geology Faculty of SciencesUniversity of SalamancaSalamancaSpain Department of Stratigraphy Faculty of GeologyComplutense UniversityMadridSpain GeoBioTec Departamento de Ciências da TerraFaculdade de Ciências e TecnologiaUniversidade Nova de LisboaCaparicaPortugal

Rural geotourism looks at the natural resources of the territory as a means of promoting a specialized,educational,sustainable tourism.This is an increasingly sought-after activity.This paper presents a rural georoute across a high mountain village,highlighting the remarkable value of the geological heritage of biological trace fossils and physical sedimentary structures exposed on street pavements and façades of houses.A series of tourist georesources were created and implemented:educational and interpretive panels,videos,QR codes,geoapps and games,all of which promote and disseminate the exceptional geological content and the history of the earth through the use of new technologies(smartphones,ipod,etc.).All this is intended as a means to make geotourism a natural tourism,favoring experiences,whilst explaining the natural environment and its temporal and spatial dimensions,offering opportunities for socio-economic development and job creation in rural areas with problems of depopulation.

关键词： Digital geotourism geological heritage georoute sustentability geotourism tourist georesources

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

利用原子和光合成扭曲双层材料（英文）

Science Bulletin 2023年第6期68卷 557-558页

作者： Alejandro gonzález-Tudela Institute of Fundamental Physics IFF-CSIC

Sometimes, an apparently naive approach can have a large impact on physics. That was the case when Geim, Novoselov, and coworkers isolated graphene for the first time by exfoliating sheets from graphite using Scotch tape. The isolation of this wonder material led to a revolution in condensed-matter physics and eventually earned them the 2010 Nobel Prize in Physics. Fourteen years later,

关键词：

Contribution of the Open Access Modality to the Impact of Hybrid journals Controlling by Field and Time Effects

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

journal of Data and Information Science 2022年第2期7卷 57-83页

作者： Pablo Dorta-gonzález María Isabel Dorta-gonzález University of Las Palmas de Gran Canaria TiDES Research Institute35017 Las Palmas de Gran CanariaSpain University of La Laguna 38271 La LagunaSpain

Purpose:Researchers are more likely to read and cite papers to which they have access than those that they cannot obtain.Thus,the objective of this work is to analyze the contribution of the Open Access(OA)modality to the impact of hybrid journals.Design/methodology/approach:The“research articles”in the year 2017 from 200 hybrid journals in four subject areas,and the citations received by such articles in the period 2017-2020 in the Scopus database,were analyzed.The hybrid OA papers were compared with the paywalled ones.The journals were randomly selected from those with share of OA papers higher than some minimal value.More than 60 thousand research articles were analyzed in the sample,of which 24%under the OA modality.Findings:We obtain at journal level that cites per article in both hybrid modalities(OA and paywalled)strongly correlate.However,there is no correlation between the OA prevalence and cites per article.There is OA citation advantage in 80%of hybrid journals.Moreover,the OA citation advantage is consistent across fields and held in time.We obtain an OA citation advantage of 50%in average,and higher than 37%in half of the hybrid journals.Finally,the OA citation advantage is higher in Humanities than in Science and Social Science.Research limitations:Some of the citation advantage is likely due to more access allows more people to read and hence cite articles they otherwise would not.However,causation is difficult to establish and there are many possible bias.Several factors can affect the observed differences in citation rates.Funder mandates can be one of them.Funders are likely to have OA requirement,and well-funded studies are more likely to receive more citations than poorly funded studies.Another discussed factor is the selection bias postulate,which suggests that authors choose only their most impactful studies to be open access.Practical implications:For hybrid journals,the open access modality is positive,in the sense that it provides a greater number of potential readers.This in turn transla

关键词： Open access Open science Scholarly communication Hybrid journals Citation advantage

Disaster Risk Governance as Assemblage: The Chilean Framework of the 1985 San Antonio Earthquake

在线全文

学校读者我要写书评

暂无评论

International journal of Disaster Risk Science 2022年第6期13卷 878-889页

作者： Daniela P.gonzález Architecture and Urban Studies Pontifcal Catholic University of Chile7520245 SantiagoChile

The purpose of this article is to analyze disaster risk governance through assemblage theory, identifying how-during the altered political context of a military regime with a centralized disaster risk management as in the case of Chile in 1985-new actors emerge during the disaster response phase as a de/reterritorialization effect that is influenced by their agencies and relationships, disfiguring the edges of the assemblage. Based on this conceptualization, it is possible to investigate the interactions between the different actors, their power relations, and their reconfigurations in the governance exercise. For this purpose, we reviewed the response phase of the 1985 San Antonio earthquake that affected the central zone of Chile, where strategic functions, institutions, and forms of power are concentrated.To describe and visualize the actors during the response phase in the disaster risk governance framework, a map of actors was developed that identifies the existing relationships and their different weights. The central scale proved to be dominant and occupied a political space that was transfigured by its overrepresentation-enforced by allies such as the banking system and business associations-enhancing a neoliberal agenda. The leaps in scale from the central scale to the local scale cancel agency of the last, destabilizing its capacity to deal with the effects of the earthquake and isolating it from the decision-making processes. Consequently,delays in providing aid demonstrate that authoritarian governments do not provide better management in the disaster response phase.

关键词： Assemblage Chile Disaster response phase Disaster risk governance San Antonio earthquake

Hydrochar and synthetic natural gas co-production for a full circular economy implementation via hydrothermal carbonization and methanation:An economic approach

在线全文

学校读者我要写书评

暂无评论

journal of Environmental Sciences 2024年第6期140卷 69-78页

作者： judith gonzález-Arias Guillermo Torres-Sempere Miriam gonzález-Castaño Francisco MBaena-Moreno Tomás RReina Inorganic Chemistry Department and Materials Sciences Institute University of Seville-CSICSevilleSpain Materials Sciences Institute(ICMSE) CSIC-University of SevilleSevilleSpain Department of Chemistry and Chemical Engineering Chalmers University of TechnologyGothenburgSE 41296Sweden

Herein we study the economic performance of hydrochar and synthetic natural gas coproduction from olive tree pruning.The process entails a combination of hydrothermal carbonization and methanation.In a previous work,we evidenced that standalone hydrochar production via HTC results unprofitable.Hence,we propose a step forward on the process design by implementing a methanation,adding value to the gas effluent in an attempt to boost the overall process techno-economic aspects.Three different plant capacities were analyzed(312.5,625 and 1250 kg/hr).The baseline scenarios showed that,under the current circumstances,our circular economy strategy in unprofitable.An analysis of the revenues shows that hydrochar selling price have a high impact on NPV and subsidies for renewable coal production could help to boost the profitability of the process.On the contrary,the analysis for natural gas prices reveals that prices 8 times higher than the current ones in Spain must be achieved to reach profitability.This seems unlikely even under the presence of a strong subsidy scheme.The costs analysis suggests that a remarkable electricity cost reduction or electricity consumption of the HTC stage could be a potential strategy to reach profitability scenarios.Furthermore,significant reduction of green hydrogen production costs is deemed instrumental to improve the economic performance of the process.These results show the formidable techno-economic challenge that our society faces in the path towards circular economy societies.

关键词： Hydrothermal carbonization CO_(2)waste valorization Methanation Profitability analysis

Tracking the change in Spanish greenhouse gas emissions through an LMDI decomposition model:A global and sectoral approach

在线全文

学校读者我要写书评

暂无评论

journal of Environmental Sciences 2024年第5期139卷 114-122页

作者： Paula Fernández gonzález María josé Presno Manuel Landajo Department of Applied Economics University of OviedoAuda del Cristos/n 33011 OviedoSpain

The reduction of GHG emissions to reverse the greenhouse effect is one of the main challenges in this century.In this paper we pursue two objectives.First,we analyze the evolution of GHG emissions in Spain in 2008–2018,at both the global and sectoral levels,with the variation in emissions decomposed into a set of determining factors.Second,we propose several actions specifically oriented to more tightly controlling the level of emissions.Our results showed a remarkable reduction(18.44%)in GHG emissions,mainly due to the intensity effect,but also to the production-per-capita effect.We detected somewhat different patterns among the various sectors analyzed.While the intensity effect was the most influential one in the agricultural,transport,and others sectors,the production-per-capita effect was predominant in the case of industry.The carbonization effect was revealed as crucial in the commerce sector.The above findings highlight the importance of the energy efficiency measures taken in recent years in the Spanish economy,also pointing to the need to deepen those strategies and to propose new measures that entail greater efficiency in emissions.Additional efforts in areas like innovation,R&D,diffusion of more eco-friendly technologies,and a greater use of greener energies all prove to be essential reduction actions to fight the greenhouse effect.

关键词： LMDI Decomposition Spain GHG emissions

Effects of fire history on animal communities:a systematic review

在线全文

学校读者我要写书评

暂无评论

Ecological Processes 2022年第1期11卷 248-258页

作者： Tania Marisol gonzález juan David gonzález‑Trujillo Alberto Muñoz Dolors Armenteras Laboratorio de Ecología del Paisaje y Modelación de Ecosistemas ECOL‑MOD Departamento de BiologíaFacultad de CienciasUniversidad Nacional de ColombiaEdificio 421111321 BogotáColombia Departamento de Biología Facultad de CienciasUniversidad Nacional de ColombiaEdificio 421111321 BogotáColombia Departamento de Didáctica de Ciencias Experimentales Sociales y MatemáticasFacultad de EducaciónUniversidad Complutense de Madrid28040 MadridSpain CREAF 08193 Cerdanyola del VallèsCataloniaSpain

Fire is a natural agent with a paramount role in ecosystem functioning and biodiversity maintenance.Still,it can also act as a negative force against many ecosystems.Despite some knowledge of the interactions of fire and vegetation,there is no clear understanding of how different components of fire regimes(i.e.,severity,history,or frequency)influence known patterns of animal communities.Therefore,we performed a systematic review on the global responses of arthropods,birds,mammals,reptiles,and amphibians to different fire regimes.Specifically,we focused on assessing how fire severity,history,and frequency modulate the effect of fire on the richness and abundance of faunal communities.We conducted a systematic review of 566 papers retrieved from the Scopus database.We also scrutinized all the documents included in the meta‑analysis of Pastro et al.(Pastro et al.Glob Ecol Biogeogr 23:1146–1156,2014).Our selection criteria excluded studies without data on species richness or abundance.We also excluded studies without adequate controls and those without information about the fire regime of the study zone.After careful examination,we used data from 162 studies to perform a quantitative meta‑analysis.From the 162 studies meeting our selection criteria,nearly 60%of the studies are from North America,25%from Australia,11%from Europe,and 4%from the tropics.According to the ecological role of fire,90%of the studies were carried out in fire‑dependent ecosystems(i.e.,conifer forests,natural savannas,pastures).Finally,40%of the studies analyzed birds,22%mammals,and 20%arthropods.The meta‑analysis of the available evidence indicates that fire history is an important modulator of animal richness and abundance.Whether negative or positive,animal responses depended on the time since the last fire event.Considering that short‑term studies may not capture such a long‑term effect on fauna,this translates to more challenges at implementing fire management strategies.Whether or not we can anticipate the impact of the fire will then dep

关键词： Amphibians Arthropods Birds Fire regime components Mammals Reptiles

New insights into Wnt signaling alterations in amyotrophic lateral sclerosis: a potential therapeutic target?

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

Neural Regeneration Research 2020年第9期15卷 1580-1589页

作者： Carlos gonzález-Fernández Pau gonzález Francisco javier Rodríguez Laboratory of Molecular Neurology Hospital Nacional de Parapléjicos (HNP)

Amyotrophic lateral sclerosis is a fatal neurodegenerative disorder characterized by upper and lower motor neuron degeneration, which leads to progressive paralysis of skeletal muscles and, ultimately, respiratory failure between 2–5 years after symptom onset. Unfortunately, currently accepted treatments for amyotrophic lateral sclerosis are extremely scarce and only provide modest benefit. As a consequence, a great effort is being done by the scientific community in order to achieve a better understanding of the different molecular and cellular processes that influence the progression and/or outcome of this neuropathological condition and, therefore, unravel new potential targets for therapeutic intervention. Interestingly, a growing number of experimental evidences have recently shown that, besides its well-known physiological roles in the developing and adult central nervous system, the Wnt family of proteins is involved in different neuropathologica conditions, including amyotrophic lateral sclerosis. These proteins are able to modulate, at least, three different signaling pathways, usually known as canonical(β-catenin dependent) and non-canonical(β-catenin independent) signaling pathways. In the present review, we aim to provide a general overview of the current knowledge that supports the relationship between the Wnt family of proteins and its associated signaling pathways and amyotrophic lateral sclerosis pathology, as well as their possible mechanisms of action. Altogether, the currently available knowledge suggests that Wnt signaling modulation might be a promising therapeutic approach to ameliorate the histopathological and functional deficits associated to amyotrophic lateral sclerosis, and thus improve the progression and outcome of this neuropathology.

关键词： ALS astrocytes Frizzled human microglia motor neuron neurodegeneration neuroinflammation spinal cord Wnt