Results 81 to 90 of about 51,320 (267)

On a dicraeosaurid specimen from the Mulichinco Formation (Valanginian, Neuquén Basin) of Argentina and phylogenetic relationships of the South American dicraeosaurids (Sauropoda, Diplodocoidea) [PDF]

open access: diamond, 2022
Guillermo J. WINDHOLZ   +6 more
openalex   +1 more source

Forecasting volcanic ash dispersal and coeval resuspension during the April-May 2015 Calbuco eruption [PDF]

open access: yes, 2016
Atmospheric dispersion of volcanic ash from explosive eruptions or from subsequent fallout deposit resuspension causes a range of impacts and disruptions on human activities and ecosystems.
Baez, Walter Ariel   +9 more
core   +1 more source

U-Pb geochronology and paleogeography of the Valanginian–Hauterivian Neuquén Basin: Implications for Gondwana-scale source areas

open access: yesGeosphere, 2020
Sedimentary basins located at the margins of continents act as the final base level for continental-scale catchments that are sometimes located thousands of kilometers away from the basin, and this condition of exceptionally long sediment transfer ...
E. Schwarz   +5 more
semanticscholar   +1 more source

Outcomes and treatment patterns for stage I human epidermal growth factor receptor 2‐positive breast cancer in the Surveillance, Epidemiology, and End Results database, 2010–2019

open access: yesCancer, Volume 131, Issue 3, 1 February 2025.
Abstract Background The risk of recurrence in patients with small, lymph node‐negative, human epidermal growth factor receptor 2 (HER2)‐positive breast cancers untreated with adjuvant chemotherapy/HER2‐directed therapy is uncertain. To investigate this, the authors conducted a retrospective, population‐based study of chemotherapy use and breast cancer ...
Adrienne G. Waks   +9 more
wiley   +1 more source

Evaluación de la incorporación de un sistema automatizado de cultivo microbiológico en un hospital público de Neuquén [PDF]

open access: yesRevista Argentina de Salud Pública, 2015
En este artículo se presenta un informe rápido de evaluación de tecnología sanitaria sobre la incorporación de un sistema de cultivo microbiano automatizado para la realización de pruebas de identificación y sensibilidad antibiótica de gérmenes en el ...
Santiago, Hasdeu   +2 more
doaj  

European Arid Anomaly Explained With Southward Drift of Eurasia During the Late Jurassic Polar Shift

open access: yesGeochemistry, Geophysics, Geosystems, Volume 26, Issue 2, February 2025.
Abstract The sedimentary successions of several basins in Europe show evidence of widespread Late Jurassic aridification that is considered a long‐standing conundrum in paleoclimate modeling. The distinctive feature of this event is that it appears concentrated in a discrete time interval between the Kimmeridgian (Late Jurassic) and the Berriasian ...
Giovanni Muttoni   +2 more
wiley   +1 more source

Body size and evolutionary rate analyses reveal complex evolutionary history of Alvarezsauria

open access: yesCladistics, Volume 41, Issue 1, Page 135-155, February 2025.
Abstract Some of the smallest examples of dinosaurian body size are from alvarezsaurians, an enigmatic group of maniraptoran coelurosaurians with a peculiar combination of anatomical features unique among theropods. Despite the large number of alvarezsaurian species described worldwide and the increased understanding this has provided, the body‐size ...
Jorge Gustavo Meso   +8 more
wiley   +1 more source

High-precision U-Pb ages in the early Tithonian to early Berriasian and implications for the numerical age of the Jurassic-Cretaceous boundary [PDF]

open access: yes, 2019
The numerical age of the Jurassic-Cretaceous boundary has been controversial and difficult to determine. In this study, we present high-precision U-Pb geochronological data around the Jurassic-Cretaceous boundary in two distinct sections from different ...
Aguirre-Urreta, Maria Beatriz   +10 more
core   +1 more source

Towards a revision of the South American genus Praocis Eschscholtz (Coleoptera, Tenebrionidae), with estimation of the diversity of each subgenus [PDF]

open access: yes, 2014
A review of the subgenera of the South American genus Praocis Eschscholtz (Pimeliinae: Praociini) is presented. Praocis comprises 77 species and 8 subspecies arranged in nine subgenera distributed in arid lands from Central Peru and Bolivia to the ...
Flores, Gustavo Ernesto   +1 more
core   +4 more sources

Ammonites and stratigraphy of a Lower Bajocian (Middle Jurassic) section in Sierra Chacaico (Neuquén Basin, Argentina) [PDF]

open access: yes, 2012
A Lower Bajocian section from southern Neuquén Basin (Argentina), with 3 faunal horizons (sphaeroceroides, submicrostoma and giebeli horizons) in the Singularis and Giebeli zones, is described.
Dietze, Volker   +3 more
core   +2 more sources

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