Results 41 to 50 of about 2,339 (217)

Epidemiology of malaria in the Amazon basin of Ecuador [PDF]

Revista Panamericana de Salud Pública, 2000
Malaria is reemerging in most endemic countries of South America. In Ecuador, malaria is endemic on the Pacific coast, in the inter-Andean valleys, and in the Amazon River basin. In the Lower-Napo region of northeastern Ecuador, malaria was considered eliminated in the 1970s, but the disease has reemerged in recent years.
M, San Sebastián, R, Játiva, I, Goicolea   +2 more
openaire   +2 more sources

Metal‐Ion Regulated Light‐Free Z→E Isomerization of Azobenzene Glycomacrocycle

Chemistry – A European Journal, EarlyView.
Metal ion‐catalyzed Z→E isomerization of photoswitchable azobenzene glycomacrocycle: A new azobenzene‐based glycomacrocycle is capable of forming a 1:1 complex with divalent metal ions in both E‐ and Z‐isomers. The complexes undergo light‐free Z→E isomerization in a timescale spanning from seconds to weeks.
Yang Zhou, Jinbiao Jiao, Mathieu Lordez, Jean‐Yves Salpin, Juan Xie   +4 more
wiley   +1 more source

The role of the Amazon Basin moisture in the atmospheric branch of the hydrological cycle: a Lagrangian analysis [PDF]

Hydrology and Earth System Sciences, 2014
We used a Lagrangian model (FLEXPART) together with the 1979–2012 ERA-Interim reanalysis data to investigate the role of the moisture in the Amazon Basin in the regional hydrological budget over the course of the year.
A. Drumond, J. Marengo, T. Ambrizzi, R. Nieto, L. Moreira, L. Gimeno   +5 more
doaj   +1 more source

Geodiversity in the Amazon drainage basin

Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
The Amazon is the largest drainage basin on Earth and contains a wide variety of abiotic landscape features. In spite of this, the geodiversity in this basin has not yet been objectively evaluated. We address this knowledge gap by combining a meta-analysis of an existing global geodiversity map and its components with a systematic literature review, to
Cécile M. E. Alsbach, Arie C. Seijmonsbergen, Carina Hoorn   +2 more
openaire   +2 more sources

Sources of carbonaceous aerosol in the Amazon Basin [PDF]

Atmospheric Chemistry and Physics, 2010
Abstract. The quantification of sources of carbonaceous aerosol is important to understand their atmospheric concentrations and regulating processes and to study possible effects on climate and air quality, in addition to develop mitigation strategies. In the framework of the European Aerosol Cloud Climate Interaction (EUCAARI) project fine (Dp < 2.
S. Gilardoni, E. Vignati, E. Marmer, F. Cavalli, C. Belis, V. Gianelle, A. Loureiro, P. Artaxo   +7 more
openaire   +3 more sources

Somatosensory Disturbance and Long‐Term Exposure to Methylmercury: A Comprehensive Review

Journal of Applied Toxicology, EarlyView.
ABSTRACT Chronic exposure to methylmercury remains a significant public health concern, particularly in populations with high fish consumption. Somatosensory disturbances are among the most frequently reported neurological manifestations, even at exposure levels below internationally established safety thresholds. This review aims to synthesize current
Leonardo Breno do Nascimento de Aviz, Carolina Fonte de Aviz, Fabiana Costa Cardoso, Laura dos Santos Barros, Raphaely Cristiny Sanches Progênio, Mariângela Moreno Domingues, José Maria Farah Costa Júnior, Saul Rassy Carneiro, Carlos Araújo da Costa, Maria da Conceição Nascimento Pinheiro   +9 more
wiley   +1 more source

Chemodiversity of Dissolved Organic Matter in the Amazon Basin [PDF]

Biogeosciences, 2016
Abstract. Regions in the Amazon Basin have been associated with specific biogeochemical processes, but a detailed chemical classification of the abundant and ubiquitous dissolved organic matter (DOM), beyond specific indicator compounds and bulk measurements, has not yet been established.
Michael Gonsior, Juliana Valle, Philippe Schmitt-Kopplin, Norbert Hertkorn, David Bastviken, Jenna Luek, Mourad Harir, Wanderley Bastos, Alex Enrich-Prast   +8 more
openaire   +6 more sources

Eye Darkening Under Dehydration Stress in the Neotropical Frog Boana punctata (Schneider, 1799)

Journal of Experimental Zoology Part A: Ecological and Integrative Physiology, EarlyView.
Dehydration induces a strong and partially reversible increase in iris pigmentation in the Neotropical frog Boana punctata. The tight relationship between iris darkening and hydration state identifies ocular pigmentation as a simple, non‐invasive physiological biomarker with broad potential for assessing hydric stress in amphibian populations ...
Ricardo Reques, Eduardo F. Schaefer, Eduardo A. Sanabria, Leonardo D. Aguiar, Lorena B. Quiroga, Miguel Tejedo   +5 more
wiley   +1 more source

Bias Correction of ERA5 Temperature Across Five Topoclimatic Clusters: A Comparative Evaluation of Four Methods

International Journal of Climatology, EarlyView.
ERA5 near‐surface temperature over South America exhibits systematic cold biases in daily maximum temperature and warm biases in daily minimum temperature. To address the continent's strong climatic and topographic heterogeneity, South America was partitioned into five topoclimatic clusters, and four bias‐correction approaches were evaluated. The Multi‐
José Roberto Rozante, Gabriela Rozante
wiley   +1 more source

Increased Amazon Basin wet-season precipitation and river discharge since the early 1990s driven by tropical Pacific variability

Environmental Research Letters, 2021
The Amazon Basin, the largest watershed on Earth, experienced a significant increase in wet-season precipitation and high-season river discharge from the early 1990s to early 2010s.
Andrew R Friedman, Massimo A Bollasina, Guillaume Gastineau, Myriam Khodri   +3 more
doaj   +1 more source