Results 11 to 20 of about 374,391 (286)
An enigmatic aquatic snake from the Cenomanian of Northern South America [PDF]
PeerJ, 2016 We report the first record of a snake from the Cretaceous of northern South America. The remains come from the La Luna Formation (La Aguada Member, Cenomanian of Venezuela) and consist of several vertebrae, which belong to the precloacal region of the ...
Adriana Albino +2 more
doaj +2 more sources
CT&F Ciencia, Tecnología & Futuro, 2022 Seven crude oil samples from Los Manueles field, Maracaibo Basin, Venezuela, were analyzed to evaluate oil mixtures associated with different oil charges into the reservoirs.
Liliana López +3 more
doaj +1 more source
Tales From Three 18th Century Eruptions to Understand Past and Present Behaviour of Etna
Frontiers in Earth Science, 2021 The structure of an active volcano is highly dependent on the interplay between the geodynamic context, the tectonic assessment as well as the magmatic processes in the plumbing system.
Rosa Anna Corsaro +3 more
doaj +1 more source
Boletín de Ciencias de la Tierra, 2015 Shale gas has become a major non-conventional energetical resource. La Luna Formation which is commonly considered as the main petroleum source rock, have also shown to be a major reservoir for shale gas resources.
Paula Andrea Pacheco Sintura +2 more
doaj +1 more source
Mineral Phosphate Solubilization in Burkholderia tropica Involves an Inducible PQQ-Glucose Dehydrogenase [PDF]
, 2016 Aims: The objective of this work was to provide knowledgement about the mechanism and regulation of the mineral phosphate solubilization in Burkholderia. tropica. To this end, the expression of the direct extracellular oxidative pathway in B. tropica was
Bernabeu, Pamela Romina +6 more
core +2 more sources
UV Photosensing Characteristics of Nanowire-Based GaN/AlN Superlattices [PDF]
, 2016 We have characterized the photodetection capabilities of single GaN nanowires incorporating 20 periods of AlN/GaN:Ge axial heterostructures enveloped in an AlN shell. Transmission electron microscopy confirms the absence of an additional GaN shell around
Arbiol, Jordi +8 more
core +6 more sources
Frontiers in Earth Science, 2023 The Middle Magdalena Valley Basin (MMVB) in Colombia has a long history of conventional hydrocarbon exploration and production, with a cumulative production of 2.75 billion barrels of oil as of December 2021.
Andrés Pastor-Chacón +14 more
doaj +1 more source
Ultrasound for improving the preservation of chicken meat [PDF]
, 2018 The objective of this study was to evaluate the effect of power ultrasound on the microbiota of chicken meat. Samples were treated under the following conditions of frequency and power: 20 kHz and 27.6 W/cm2; 40 kHz and 10.3 W/cm2; 850 kHz and 24.1 W/cm ...
Alarcon-Rojo, Alma D. +5 more
core +3 more sources
Energies, 2020 The organic geochemical features of 30 sampled oils from the northern Bolivar Coastal Complex (Lake Maracaibo Basin, NW Venezuela) were examined by combining carbon isotope, classical biomarker, and extended diamondoid analyses to clarify source facies ...
Marcos Escobar +7 more
doaj +1 more source
, 2016 Mineralogy and microstructure are key variables defining the physical properties of a rock. Mudstones show inherently heterogeneous matrix pore-size distributions.
C. Ríos +2 more
semanticscholar +1 more source