Buscar
Mostrando ítems 11-20 de 21
Paleomagnetic pole positions and geomagnetic secular variation from the Cretaceous Ponta Grossa dike swarm (Brazil)
(2015)
"A detailed paleomagnetic and rock magnetic investigation has been carried out on the Early Cretaceous Ponta Grossa dike swarm in southern Brazil. This formation seems an excellent target for paleomagnetic study. The dikes ...
Laboratory synthesis of goethite and ferrihydrite of controlled particle sizes
(2015)
"Iron oxyhydroxides, such as goethite and ferrihydrite, are highly abundant and ubiquitous minerals in geochemical environments. Because of their small particle sizes, their surface reactivity is high towards adsorption ...
Southward migration of magmatic activity in the Colima volcanic complex, Mexico: an ongoing process
(2015)
"The Colima Volcanic Complex trends in a nearly N-S direction in western Mexico, and one of its structures, Colima volcano, is the most historically active volcano in the country. Immediately to the N, there is another ...
Groundwater flow processes and mixing in active volcanic systems: the case of Guadalajara (Mexico)
(2015)
"Groundwater chemistry and isotopic data from 40 production wells in the Atemajac and Toluquilla valleys, located in and around the Guadalajara metropolitan area, were determined to develop a conceptual model of groundwater ...
Emisiones totales anuales de CO2 por incendios forestales en el periodo 1999-2010 en México y estimación de índice de riesgo
(2015-07)
"En las últimas décadas el fuego en los ecosistemas se ha convertido en una fuente emisora de grandes cantidades de contaminantes que impactan el sistema atmosférico. Estos impactos se reflejan en la mala calidad del aire ...
Air quality deterioration of urban areas caused by wildfires in a natural reservoir forest of Mexico
(Hindawi, 2015)
"Many regions of the world suffer loss of vegetation and reduced air quality due to wildfires. Studies on aerosol emissions by wildfires often discuss the negative effects of atmospheric contaminants from a regional or ...
Determinación de arsénico en cabello de poblaciones expuestas en Matehuala, San Luis Potosí, México
(2015-07)
"La problemática de contaminación en agua por disolución de arseniatos de calcio en Matehuala, San Luis Potosí, México, ha sido propuesta como la más alta en el mundo a pH cercanos al neutro. No obstante, antes de este ...
Water poverty index in subtropical zones: The case of Huasteca Potosina, MexicoÍndice de pobreza del agua en zonas subtropicales: el caso de la Huasteca Potosina, México
(2015-08)
"Tools are needed in order to evaluate an integrated water resource management, and to encourage the management and coordinated usage of water resources along with the environmental and socioeconomic factors. One of those ...
Caracterización de la materia orgánica disuelta en agua subterránea del Valle de Toluca mediante espectrofotometría de fluorescencia 3D
(2015-08)
"La materia orgánica en el agua está compuesta por miles de componentes: partículas macroscópicas, coloides o macromoléculas disueltas. Caracterizar la materia orgánica disuelta en el agua para abastecimiento humano es ...
Caracterización magnética de polvo urbano y plantas de la Zona Metropolitana del Valle de México
(2015)
"Investigaciones recientes han demostrado que los gases automotores contienen elementos potencialmente tóxicos, los cuales se acumulan sobre las superficies del suelo urbano (asfalto, cemento, empedrado, etc.) y se mezclan ...