Results 21 to 30 of about 140,327 (238)

Mecanismos de rotura no extremo norte da arriba fóssil da Costa de Caparica

open access: yesGeotecnia, 2005
A evolução morfológica do trecho setentrional da arriba fóssil da Costa de Caparica, compre endido entre S. Pedro da Trafaria e a via rápida IC 20, tem-se vindo a notar nas últimas décadas, sendo devida, em grande medida, à crescente interferência das ...
Pedro Lamas, J.A. Rodrigues Carvalho
doaj   +1 more source

Hydrogen‐Assisted Fracture of Iron‐Based Fe–Ni–Al Alloys

open access: yesAdvanced Engineering Materials, EarlyView.
Principal relations and fracture mechanisms of single‐phase and precipitate‐strengthened Fe–Ni–Al alloys subjected to prior electrochemical hydrogen charging are identified. The mechanisms of hydrogen effect on strength and microhardness are discussed, including hydrogen‐induced increase in microhardness and the role of hydrogen in fracture behavior ...
Nataliya Yadzhak   +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]

open access: yes, 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.   +2 more
core  

Ideal Molecular Sieving with a Dense MOF for Helium Upgrading with Highly Diffusion Selective Mixed Matrix Membranes

open access: yesAdvanced Functional Materials, EarlyView.
The separation of Helium gas from natural gas is challenging but highly important. MIL‐116(Ga), a “non‐porous” metal–organic framework is used as a molecular sieve to separate He from CH4. Druse‐like MIL‐116(Ga) particles are integrated into polysulfone mixed matrix membranes.
Ayisha Komal   +10 more
wiley   +1 more source

FOSSIL RECORDS

open access: yesBothalia: African Biodiversity & Conservation, 1965
No abstract ...
R. A. Dyer
doaj   +1 more source

Rupicapra rupicapra (Mammalia) in the late pleistocene of Portugal [PDF]

open access: yes, 1989
A presença do género Rupicapra é demonstrada pela primeira vez em Portugal, com base em restos, dentários e do esqueleto, provenientes do Plistocénico superior (Solutrense) da gruta das Salemas.
Antunes, M. Telles, Cardoso, João Luís
core   +1 more source

Dual‐Mode Film Based on Highly Scattering Nanofibers and Upcycled Chips‐Bags for Year‐Round Thermal Management

open access: yesAdvanced Functional Materials, EarlyView.
Intelligent radiative cooling devices, adaptable to various weather conditions, have the potential for year‐round energy savings. This study introduces a sustainable dual‐mode film made from polycaprolactone nanofibers and upcycled chip bags for effective thermal management.
Qimeng Song   +4 more
wiley   +1 more source

Energy trends and the water-energy binomium for Brazil

open access: yesAnais da Academia Brasileira de Ciências, 2015
According to the demands of energy saving and carbon emission reduction, the water vs. energy nexus has become a major concern worldwide. Brazil occupies a singular position in the global energy system.
Gisele O. Da Rocha   +2 more
doaj   +1 more source

The oldest fossil mushroom. [PDF]

open access: yesPLoS ONE, 2017
A new fossil mushroom is described and illustrated from the Lower Cretaceous Crato Formation of northeast Brazil. Gondwanagaricites magnificus gen. et sp. nov.
Sam W Heads   +7 more
doaj   +1 more source

Indicações de aspecto tecnológico sobre o bioetanol de matéria-prima amilácea. [PDF]

open access: yes, 2011
A matriz energética mundial ainda é fortemente inclinada para as fontes de carbono fóssil, com participação total de 80%, sendo 36% de petróleo, 23% de carvão mineral e 21% de gás natural.
DISPATO, I.   +2 more
core   +1 more source

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