Results 71 to 80 of about 469,071 (291)

Estudo da eficiência energética de fachadas fotovoltaicas em Portugal [PDF]

, 2013
A redução dos níveis de CO2 emitidos para a atmosfera, resultantes do consumo energético, vem constituindo ao longo dos últimos anos uma preocupação global.
Almeida, Manuela Guedes de, Bragança, L., Caram, Rosana, Sacht, Helenice M.   +3 more
core  

Role of Histidine‐Containing Peptoids in Accelerating the Kinetics of Calcite Growth

Advanced Functional Materials, EarlyView.
Amphiphilic histidine‐containing peptoids mimic carbonic anhydrase (CA) to accelerate calcite step growth. In the presence of Zn2+, they promote the deprotonation of HCO3−, the desolvation of Ca2+, and the reorganization of interfacial hydration layers, thereby reducing the activation barrier for calcite growth.
Mingyi Zhang, Ying Chen, Chenyang Shi, Progyateg Chakma, James J. De Yoreo, Chun‐Long Chen   +5 more
wiley   +1 more source

Tendências na literatura científica global sobre o biodiesel: uma análise cienciométrica

Bioscience Journal, 2014
O combustível fóssil dá sinais de esgotamento das suas reservas além de afetar o meio ambiente devido à poluição decorrente de sua queima. Surgiu assim um novo desafio: encontrar um combustível substituto que seja renovável e que seja menos poluente.
Rafael Batista Ferreira, Antônio Cruvinel Borges Neto, João Carlos Nabout, Flívia Fernandes de Jesus, Jordana Moura Caetano, Itamar Rosa Teixeira   +5 more
doaj  

Integrated genomic and fossil evidence illuminates life’s early evolution and eukaryote origins

Nature Ecology & Evolution, 2018
Establishing a unified timescale for the early evolution of Earth and life is challenging and mired in controversy because of the paucity of fossil evidence, the difficulty of interpreting it and dispute over the deepest branching relationships in the ...
Holly C. Betts, Mark N. Puttick, James W. Clark, T. Williams, P. Donoghue, D. Pisani   +5 more
semanticscholar   +1 more source

Chiral Nanohoops as an Efficient Spin Polarization System

Advanced Functional Materials, EarlyView.
Chiral conjugated nanohoops with a central dibenzopentalene unit exhibit 90% spin polarization at low voltage and high conductivity. These properties make them ideal components in molecular spintronics applications. Abstract A central challenge in molecular spintronics is to achieve a high spin polarization at low operating voltages and ambient ...
Anu Gupta, Philipp Seitz, Mathias Hermann, Birgit Esser, Ron Naaman   +4 more
wiley   +1 more source

Petro-masculinity: Fossil Fuels and Authoritarian Desire

Millennium: Journal of International Studies, 2018
As the planet warms, new authoritarian movements in the West are embracing a toxic combination of climate denial, racism and misogyny. Rather than consider these resentments separately, this article interrogates their relationship through the concept of ...
Cara Daggett
semanticscholar   +1 more source

Transition From Lattice Oxygen to Radical‐Mediated Oxidation in Ammonium‐Intercalated Birnessite Catalysts for Selective Valorization of Biomass to Produce Formic Acid

Advanced Functional Materials, EarlyView.
The catalytic valorization of biomass represents an essential approach for achieving sustainable chemical production, with formic acid (FA) being recognized as a valuable platform chemical for hydrogen storage and environmentally friendly synthetic applications.
Yiqi Geng, Wei Xiong, Wenhua Xue, Jian Ye, Puranjan Mishra, Rajenahally V. Jagadeesh, Jun Zhao   +6 more
wiley   +1 more source

Criação de um kit de fósseis do Paraná para inserção na Educação [PDF]

, 2017
Anais do 35º Seminário de Extensão Universitária da Região Sul - Área temática: EducaçãoNo âmbito do projeto de extensão Geodiversidade na Educação, em atividade na Universidade Estadual de Ponta Grossa (UEPG) desde 2011, vêm sendo concebidos materiais
Liccardo, Antonio, Lopes, Christopher Vinicius Santos, Mário Cézar   +1 more
core  

Upcycling of Disposable Face Masks into Water‐Resistant and Flame Retardant Foams

Advanced Functional Materials, EarlyView.
Disposable mask waste is upcycled into lightweight polypropylene‐based foams with tunable porosity and composite architectures reinforced by ear‐loop fibers. The sustainable solvent‐based process enables upcycling rates of 91% and solvent recovery of >90%.
Jingjing Pan, Erlantz Lizundia, Hao Jia, Lennart Bergström   +3 more
wiley   +1 more source

Agroenergia e as potencialidades do pinhão-manso (Jatropha curcas L.) para a produção de óleo para biodiesel na região Meio-Norte do Brasil. [PDF]

, 2011
Introdução; Desenvolvimento; Biodiesel: energia limpa para substituir o óleo diesel fóssil; Pinhão-manso; Espaçamento; Exigências hídricas do pinhão-manso; Biologia floral; Rendimento em óleo; Poda; Produtividade de sementes e óleo de pinhão-manso ...
ARAÚJO, E. C. E., SOUSA, H. U. de, VELOSO, M. E. da C.   +2 more
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