A5016103191- X-ray Spectroscopy and Fluorescence Analysis
- Nuclear Physics and Applications
- Air Quality and Health Impacts
- Atmospheric chemistry and aerosols
- Electron and X-Ray Spectroscopy Techniques
- Air Quality Monitoring and Forecasting
- Radiation Shielding Materials Analysis
- Radioactivity and Radon Measurements
- Ion-surface interactions and analysis
- Atmospheric aerosols and clouds
- Heavy metals in environment
- Archaeology and ancient environmental studies
- Cultural Heritage Materials Analysis
- Advanced X-ray and CT Imaging
- Climate Change and Health Impacts
- Legume Nitrogen Fixing Symbiosis
- Atmospheric Ozone and Climate
- Heavy Metals in Plants
- Plant nutrient uptake and metabolism
- Atomic and Molecular Physics
- Energy and Environment Impacts
- Mercury impact and mitigation studies
- Mass Spectrometry Techniques and Applications
- Indoor Air Quality and Microbial Exposure
- Microbial Fuel Cells and Bioremediation
Universidad Nacional Autónoma de México
2016-2025
Colegio de Postgraduados
2020
BP (United Kingdom)
2015
Instituto Nacional de Investigaciones Nucleares
2012-2013
University of California, Davis
1991-2009
Centre Hospitalier Universitaire Henri-Mondor
2007
Instituto Nacional de Cancerología
2003
Instituto de Biotecnología de León
2001
Exposure to urban airborne particulate matter (PM) is associated with adverse health effects. We previously reported that the cytotoxic and proinflammatory effects of Mexico City PM10 (less than or equal 10 micro m mean aerodynamic diameter) are determined by transition metals endotoxins these particles. However, PM2.5 2.5 could be more important as a human risk because this smaller PM has potential reach distal lung after inhalation. In study, we compared those using murine monocytic...
Abstract. Atmospheric aerosol particles that can nucleate ice are referred to as ice-nucleating (INPs). Recent studies have confirmed emitted by the oceans act INPs. This very relevant information be included in climate and weather models predict formation of clouds, given most them do not consider a source Very few sample INPs been carried out tropical latitudes, there is need evaluate their availability understand potential role marine may play hydrological cycle regions. study presents...
The performance of a new X-ray spectrometer is presented. device was designed originally to be employed in environmental sciences, and allows the use different types primary radiation sources, such as radioactive source (241Am) or tubes with anodes metals (Rh W). Among advantages this are possibility exchanging detectors improve efficiency at energy ranges [such Si (Li), Si-PIN, hyperpure Ge, CdTe detectors], attach it wavelength dispersive system, its vacuum atmospheric pressure....
Abstract. On a global scale, African dust is known to be one of the major sources mineral particles, as these particles can efficiently transported different parts planet. Several studies have suggested that Yucatán Peninsula could influenced by such especially in July, associated with strengthening Caribbean low-level jet. Although potential significantly impact local air quality, shown elsewhere (especially respect particulate matter, PM), arrival and Mexican territory has not been...
In growing Mexican cities, there are few studies on air pollution, especially the topic of characterization for chemical composition Particulate Matter (PM). This work presents an X-ray Fluorescence (XRF) analysis and Total Carbon PM2.5 in a two-year monitoring campaign from 20 May 2017 to 30 July 2018, collecting 96 daily samples northeast area San Luis Potosi city reconstruct gravimetric mass perform source apportionment study using Positive Matrix Factorization model (PMF). Concentration...
Abstract. Most precipitation from deep clouds over the continents and in intertropical convergence zone is strongly influenced by presence of ice crystals whose formation requires nucleating particles (INPs). Although there are a large number INP sources, abilities aerosol originating oceans, deserts, wildfires poorly described at tropical latitudes. To fill this gap knowledge, National Autonomous University Mexico micro-orifice uniform deposit impactor droplet freezing technique...
Abstract More than 7 thousand wildfires were recorded over Mexico in 2019, affecting almost 640 hectares. Most of these fires occurred during the spring season generating dense smoke plumes, impacting urban areas central part Mexican plateau. From May 10 to 17, biomass burning (BB) plumes affected City (MC) and diffused across basin, producing PM 2.5 levels ~ 2 times higher nation's air quality standards. Average concentrations increased sharply from 29.4 ± 7.2 µg m −3 65.1 13.6 when...