Results 41 to 50 of about 287,633 (218)

The influence of rivers on seabird foraging ecology

open access: yesBiological Reviews, EarlyView.
ABSTRACT Rivers act as vital arteries to the world's oceans, delivering fresh water and nutrients that sustain marine ecosystems. Globally, river flow increasingly is being altered by climate change and anthropogenic pressures; yet the significance of rivers to predatory marine species, such as seabirds, and the extent to which river‐related changes ...
Julia B. Morais   +2 more
wiley   +1 more source

Executive Functions and Their Relation to Academic Performance in University Students

open access: yesPsicología Educativa: Revista de los Psicólogos de la Educación
Academic performance, dropout rates, and low graduation rates constitute an area of concern in Latin American universities that has been the topic of various studies.
Macarena V. del-Valle   +4 more
doaj   +1 more source

Denitrification-derived nitric oxide modulates biofilm formation in Azospirillum brasilense [PDF]

open access: yes, 2013
Azospirillum brasilense is a rhizobacterium that provides beneficial effects on plants when they colonize roots. The formation of complex bacterial communities known as biofilms begins with the interaction of planktonic cells with surfaces in response to
Arruebarrena Di Palma, Andrés   +7 more
core   +1 more source

Stochastic Modelling of Daily Precipitation in Semi‐Arid Regions Using Markov Chains and Parametric Distributions

open access: yesInternational Journal of Climatology, EarlyView.
This study applies stochastic rainfall models combining Markov Chains with gamma and mixed exponential distributions to a semi‐arid climate in Northeast Brazil. Model structures were evaluated using Bayesian Information Criterion (BIC), with maximum likelihood (MLM) for parameter estimation and cumulative distribution functions (CDFs) for validation ...
Gabriel Magno Cavalcante Calado   +5 more
wiley   +1 more source

XX Cumbre Iberoamericana

open access: yesAportes para la Integración Latinoamericana, 2010
Declaración de Mar del Plata. Mar del Plata, Provincia de Buenos Aires, 4 de diciembre de 2010. Declaración especial sobre la Defensa de la democracia y el orden constitucional en Iberoamérica.
Cumbre Iberoamericana
doaj  

DNA barcoding suggests hidden diversity within the genus Zenopsis (Zeiformes, Zeidae) [PDF]

open access: yesZoosystematics and Evolution
Currently, the genus Zenopsis, also known as silver John Dory, comprises at least five valid species with a wide range of distribution. However, recent studies have proposed the existence of a new Zenopsis species inhabiting the Indian Ocean, and a ...
Florencia Matusevich   +7 more
doaj   +3 more sources

REFLEXIÓN, FORMACIÓN INICIAL Y MODELO INTERCONECTADO DE CRECIMIENTO PROFESIONAL DOCENTE. UN ESTUDIO DE CASO

open access: yesRevista Binacional Brasil - Argentina, 2021
Diferentes investigaciones han advertido sobre el impacto, comparativamente bajo, que presenta la formación inicial en el ejercicio profesional respecto de otras instancias formativas propias del desarrollo profesional docente. En este
Guillermo Cutrera   +1 more
doaj   +1 more source

Registros recientes delgasterópodo exótico Rapana venosa (Valenciennes, 1846) a lo largode la línea costera Argentina: ¿Está progresandolainvasiónhaciaelsur? [PDF]

open access: yes, 2014
Se presentan los registros más recientes de R. venosa a lo largo de la línea costera de Argentina (2010-2013), incluyendo el hallazgo de un individuo en la albufera Mar Chiquita (200 km al sur del Río de la Plata).
Bruno, Luis Ignacio   +1 more
core  

Nanocomposites with shape memory behavior based on a segmented polyurethane and magnetic nanostructures [PDF]

open access: yes, 2018
Shape-memory composites based on a commercial segmented polyurethane and magnetite (Fe⁠3O⁠4) nanoparticles(NPs) were prepared by a simple suspension casting method.
Actis, Daniel Guillermo   +5 more
core   +1 more source

Two new records for the flora of Paraguay: Stemodia diplohyptoides and S. lobelioides (Plantaginaceae:Gratioleae)

open access: yesNordic Journal of Botany, EarlyView.
Stemodia diplohyptoides M.M.Sosa & Dematt. and S. lobelioides Lehm. (Gratioleae, Plantaginaceae) are reported for the first time in Paraguay, found in Alto Paraná and Presidente Hayes departments, respectively. These new records extend the known geographical range of both species, representing the northern records to date, S.
Y. Carlés Bechara   +4 more
wiley   +1 more source

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