Results 71 to 80 of about 50,831 (210)
The making of pure quartzose sand in continental interiors: Paraná River (Brazil and Argentina)
Sedimentology, Volume 73, Issue 3, Page 802-837, April 2026.ABSTRACT As part of a comprehensive project on sedimentary processes in South America, this study focuses on sediment generation in the intracratonic Paraná Basin and monitors the evolution of sand composition along the Paraná River from central Brazil to the Río de la Plata estuary in Argentina.
Eduardo Garzanti +5 more
wiley +1 more source
Reconciling observed and simulated stellar halo masses [PDF]
, 2018 We use cosmological hydrodynamical simulations of Milky-Way-mass galaxies from the FIRE project to evaluate various strategies for estimating the mass of a galaxy's stellar halo from deep, integrated-light images.
Chan, Tsang Keung +8 more
core +5 more sources
Meridiano 47, 2017 O presente artigo busca delinear os rumos do processo de integração das Américas, sob a ALCA, e seus possíveis impactos sob o NAFTA.
Cristina Soreanu Pecequilo
doaj
Microstratigraphy and Site Formation Processes at Quebrada Jaguay 280 (Peru)
Geoarchaeology, Volume 41, Issue 2, March/April 2026.ABSTRACT This study presents a microanalytical, geoarchaeological study of Quebrada Jaguay (QJ)‐280, a Terminal Pleistocene–Holocene coastal site in southern Peru. Combining micromorphology, µXRF and µFTIR, we develop a site formation model that also reassesses site use and forager behaviour.
Sarah A. Meinekat +6 more
wiley +1 more source
Relações Brasil e Estados Unidos no período Bush
Meridiano 47, 2017 The article deals with the political and economic relationship between Brazil and United States during the George W Bush mandate (2001-2008). It discusses the failed attempt to establish a hemispheric free trade agreement, due to the American ...
Virgílio Caixeta Arraes
doaj
Scientific Reports, 2022 Differential diagnosis of left ventricular hypertrophy (LVH) is often obscure on echocardiography and requires numerous additional tests. We aimed to develop a deep learning algorithm to aid in the differentiation of common etiologies of LVH (i.e ...
In-Chang Hwang +12 more
doaj +1 more source
Swimming modes affect dive durations in diving birds
Journal of Avian Biology, Volume 2026, Issue 2, March 2026.Dive duration and body mass are positively correlated across air‐breathing vertebrate species, but other factors affecting dive duration are inadequately studied. Here, we examined the effect of a previously overlooked factor, swimming mode, using phylogenetically informed statistics with data on the diving capabilities of 53 species of avian divers ...
Hiroya Matsushita, Yuuki Y. Watanabe
wiley +1 more source
Floral stem cell termination involves the direct regulation of AGAMOUS by PERIANTHIA [PDF]
, 2009 In Arabidopsis, the population of stem cells present in young flower buds is lost after the production of a fixed number of floral organs. The precisely timed repression of the stem cell identity gene WUSCHEL (WUS) by the floral homeotic protein AGAMOUS (
Das, Pradeep +6 more
core +2 more sources
Augusto Guzzo Revista Acadêmica, 2012 A adesao a Area de Livre Comercio das Americas - ALCA - tornou-se um dilema para o Brasil, uma verdadeira encruzilhada historica. A decisao que for tomada sera um daqueles eventos cruciais para o futuro da nacao. O que esta em jogo nao e apenas a nossa balanca comercial mas o proprio futuro da economia brasileira.
openaire +2 more sources
Advanced Science, Volume 13, Issue 9, 13 February 2026.Lithium–oxygen batteries face an energy‐power trade‐off due to sluggish O2 transport and pore clogging by Li2O2. Simulations show that reducing tortuosity via interconnected macropores enhances oxygen mobility. A freestanding graphene electrode having interconnected macropores with low tortuosity delivers >2500 mAh g−1, stable lean‐electrolyte cycling,
Arghya Dutta +7 more
wiley +1 more source