Results 21 to 30 of about 3,386,714 (285)

Acute toxicity of arsenic and oxidative stress responses in the embryonic development of the common South American toad Rhinella arenarum [PDF]

, 2015
Arsenic (As), a natural element of ecological relevance, is found in natural water sources throughout Argentina in concentrations between 0.01mg/L and 15mg/L. The autochthonous toad Rhinella arenarum was selected to study the acute toxicity of As and the
Adams, Bagnyukova, Beers, Bongiovanni, Brix, Brodeur, Bundschuh, Chen, Del Conte, Ellman, Evelson, Farnfield, Ferrari, Ferrari, Ferrari, Guidi, Habig, Kensler, Kobayashi, Kono, Lascano, Lascano, Lowry, Lu, Miller, Montagna, Moriarty, Rahman, Rankin, Rizzo, Soria, Sotomayor, Suhendrayatna, Ventura-Lima, Ventura-Lima, Venturino, Venturino, White   +37 more
core   +1 more source

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

The 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, Ricardo Araújo, Bruce S. Rubidge, Michael O. Day, Kathleen N. Dollman, Julien Benoit   +5 more
wiley   +1 more source

Estudio palinológico de un perfil sedimentario del Holoceno medio-tardío, oeste del Iberá, Corrientes, Argentina

Revista Mexicana de Ciencias Geológicas, 2018
Con la denominación "Iberá", identificamos a uno de los humedales tropicales más importantes de la biósfera en términos de su extensión y de las especies que lo habitan, tanto animales como vegetales. El objetivo de este trabajo es a partir del análisis
Lionel Fernandez Pacella
doaj   +1 more source

Use of information and communication technologies as a motivational strategy in the blended learning classroom [PDF]

, 2019
Introducción. El actual desempeño académico y ante las exigencias del mundo profesional, es indispensable el fortalecimiento del saber Ser, entendiéndose como el sentirse competente y autónomo, a partir de un ambiente sustentador utilizando dentro de las
Cahuich Moo, Jorge, Estrada Carmona, Sinuhé, García Reyes, Liliana, Pacheco Quijano, Luz, Pérez Aranda, Gabriela, Tuz Sierra, Miguel A.   +5 more
core   +2 more sources

Preparing an Exsolvable Ru‐Substituted LaFeO3 Perovskite With High Surface Area From a Self‐Sacrificial Polymer Template: A Versatile Strategy for Enhanced Catalytic Performance

Chemistry – A European Journal, EarlyView.
High‐surface‐area LaFe0.9Ru0.1O3 is prepared by infiltration of porous Amberlite XAD16 polymer beads. Ru exsolution of this perovskite material leads to a supported catalyst with small Ru particles, exhibiting promising catalytic performance propane combustion.
Jaime Gallego, Yu Wang, Alexander Santamaría, Herbert Over, Bernd M. Smarsly   +4 more
wiley   +1 more source

Non‐stationary forest responses to hotter droughts: a temporal perspective considering the role of past legacies

Ecography, EarlyView.
Global change is altering forests worldwide, with multiple consequences for ecosystem functioning. Temporal changes in climate, and extreme, compounded weather events like hotter droughts are affecting the demography, composition and function of forests, leading to a highly uncertain future.
Xavier Serra‐Maluquer, Julen Astigarraga, César Morales-Molino, Paloma Ruiz-Benito   +3 more
wiley   +1 more source

Proyectos relacionados con diversidad, ecología, desplazamiento, virulencia y potencial biotecnológico de cepas de Listeria spp. aisladas en Costa Rica a partir de muestras alimentarias, clínicas y ambientales

Tecnología en Marcha, 2019
El género Listeria está compuesto por más de 15 especies, que pueden ser aisladas de diferentes ambientes, incluyendo vegetación, suelo, agua y animales. L. monocytogenes ha sido mundialmente estudiada como un modelo de patogénesis intracelular, lo cual
Kattia Núñez-Montero, Luis Barboza-Fallas, Rossy Guillén-Watson, Olga Rivas-Solano, Johnny Peraza-Moraga   +4 more
doaj   +1 more source

Ground‐ and Excited‐State Mixed Valency in a 4,4′‐Bipyridine‐Bridged Bimetallic Di‐Ruthenium Complex

European Journal of Inorganic Chemistry, EarlyView.
Photoinduced mixed‐valence interactions across a 4,4′‐bpy bridge were studied. MLCT excited states in the bimetallic complex are longer‐lived than in the monometallic reference, thanks to metal–metal electronic coupling and hole delocalization, but are still shorter than the nanosecond timescale relevant for diffusional reactivity.
Ivana Ramírez‐Wierzbicki, Frank W. Heinemann, Leonardo D. Slep, Alejandro Cadranel   +3 more
wiley   +1 more source

Ficha Técnica da Edição

Desenvolvimento e Meio Ambiente
Equipe Editorial e Técnica deste volume / Editorial and technical team for this volume:   Editores-chefes / Editors-in-chief: Manuela Dreyer Silva e Letícia da Costa e Silva Editores adjuntos / Associate editors: Angela Duarte Damasceno Ferreira,
Editores Desenvolvimento e Meio Ambiente
doaj   +1 more source

Responsabilidad civil extracontractual del Estado por el impacto ambiental derivado de la actividad minera

Nuevo Derecho, 2016
El ambiente es un derecho colectivo protegido constitucional y legalmente. Existen diversos agentes que deterioran el medio ambiente, entre ellos, el uso del mercurio en la minería informal, generando como consecuencia la contaminación de los recursos ...
Jaime Andrés Díaz Sánchez, Johnatan Díaz Sánchez, Diana Restrepo   +2 more
doaj   +1 more source