Results 51 to 60 of about 120,177 (175)

Are regional stages necessary? [PDF]

open access: yes, 2005
The bipartition of the Carboniferous System adopted by the International Commission of Stratigraphy for the world stratigraphic chart is impractical in Gondwana.
Gonzalez, Carlos Roberto
core  

Drainage basin morphometry of the Encadenadas del Oeste lakes, Argentina [PDF]

open access: yes, 2016
The Las Encadenadas basin can be defined as an endorheic fluviolacustrine system. The aim of this study is to identify hydrographic sectors and subbasins within the Encadenada’s drainage basin and analyze the former’s morphometric properties including ...
Geraldi, Alejandra Mabel   +2 more
core   +1 more source

Evolutionary radiation of large‐bodied gorgonopsians from the lower Abrahamskraal formation of South Africa

open access: yesThe Anatomical Record, EarlyView.
Abstract The middle Permian represents a critical interval in therapsid evolution, when gorgonopsians emerged as some of the first specialized apex predators within terrestrial ecosystems. Despite their significance, the early diversification of Gorgonopsia in Gondwana remains poorly understood due to scarcity and fragmentary material.
Zanildo Macungo   +5 more
wiley   +1 more source

Environmental and climatic proxies for the Cañadón Asfalto and Neuquén basins (Patagonia, Argentina): review of middle to upper jurassic continental and near coastal sequences [PDF]

open access: yes, 2015
In this review, we include several proxies (sedimentology, palynology, invertebrates) from the Cañadón Asfalto and Neuquén basins, to infer the environments and regional climatic context during the Middle to Late Jurassic of Patagonia.
Cabaleri, Nora Graciela   +6 more
core   +1 more source

Evidence From Microscopy and U–Pb Geochronology as a Clue to the Influence of the Cretaceous Magmatism in the Diagenesis of Pre‐Salt Carbonate Reservoirs in the Santos Basin (Brazil)

open access: yesGeological Journal, EarlyView.
Carbonates from Santos Basin revealed U–Pb ages correlated with basalt ages (A), suggesting that they were formed during magmatic events. These events placed hot CO2 in the reservoir, which, when mixed with carbonate‐rich cold water (B), led to thermal convection, enabling the formation of the U contained in the carbonates.
Marco António Ruivo de Castro e Brito   +8 more
wiley   +1 more source

Geología de Bahía Culebra, Guanacaste, Costa Rica

open access: yesRevista de Biología Tropical, 2012
La geología de Bahía Culebra, Guanacaste, Costa Rica, está compuesta por rocas volcánicas de corteza oceánica; sedimentos marinos depositados en el talud, la plataforma continental y zonas someras cerca de la costa; secuencias de rocas piroclásticas ...
Pablo Herrera Zúñiga, Ana Enid Vargas
doaj   +2 more sources

Darwin y el relleno de los valles andinos de Mendoza

open access: yesRevista del Museo de La Plata, 2016
En 1835, aprovechando una escala en Valparaíso (Chile) del Beagle, Charles Darwin cruzó los Andes hacia Mendoza, travesía durante la cual realizó un gran número de observaciones geológicas.
José Francisco Mescua
doaj   +1 more source

Optimization of the diffraction efficiency in photorefractive crystals [PDF]

open access: yes, 2017
The aim of this work is to study and to optimize the diffraction efficiency in sillenite BTO crystals. A theoretical analysis, where the effects of coupling beams are significant,is carried on. In addition, non-mobile transmission gratings are considered.
Arias Hernández, Néstor Alonso   +3 more
core   +2 more sources

Biofertilization of canola seeds with Peribacillus simplex and Paenibacillus polymyxa bacteria increases tocopherol content

open access: yesJSFA reports, EarlyView.
Abstract Background Biofertilization with plant growth‐promoting bacteria (PGPB) is a reliable strategy to reduce the amounts of chemical fertilizers applied to crops. Nevertheless, the effects of biofertilizers on plant chemical constituents that influence food quality and human health should be evaluated.
Pilar Martínez‐Hidalgo   +5 more
wiley   +1 more source

Nutritional characterization of Cusco green tea and its synergistic effect with omega‐3 on metabolic and cognitive dysfunctions in obese rats

open access: yesJournal of the Science of Food and Agriculture, EarlyView.
Abstract BACKGROUND Obesity and its metabolic complications, such as insulin resistance and cognitive decline, remain a global health challenge. Green tea (Camelia sinensis) and ω‐3 polyunsaturated fatty acids (PUFAs) are recognized for their antioxidant, anti‐inflammatory, and neuroprotective properties.
Paola Finetti‐Casanova   +5 more
wiley   +1 more source

Home - About - Disclaimer - Privacy