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Listar por autor "Villa Alfageme, María"
Mostrando ítems 1-20 de 40
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Artículo
234Th-derived particle fluxes and seasonal variability: when is the ss assumption reliable? Insights from a novel Approach for carbon flux simulation
Ceballos Romero, Elena; Soto, Feliciano de; Le Moigne, Frederic; García-Tenorio García-Balmaseda, Rafael; Villa Alfageme, María (AGU Publications, 2018-12)Th measurements are widely used to estimate the downward carbon flux of particles via the oceanic Biological Pump. Carbon ...
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Artículo
A self-sufficient and general method for self-absorption correction in gamma-ray spectrometry using GEANT4
Hurtado Bermúdez, Santiago José; Villa Alfageme, María; Manjón Collado, Guillermo; García-Tenorio García-Balmaseda, Rafael (Elsevier, 2007)This paper presents a self-sufficient and general method for measurement of the activity of low-level gamma-emitters in ...
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Artículo
A sequential determination of Sr-90 and Po-210 in food samples
Hurtado Bermúdez, Santiago José; Más Balbuena, José Luis; Villa Alfageme, María (ELSEVIER SCI LTD, 2017)The latest EU Council Regulation 2016/52/Euratom updates the emergency limits on radionuclides in foods including 210Po ...
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Artículo
AMS measurements of 129I in seawater around Iceland and the Irminger Sea
Gómez Guzmán, José Manuel; Villa Alfageme, María; Le Moigne, Frederic; López Gutiérrez, José María; García León, Manuel (ScienceDirect, 2013-01)Large amounts of iodine-129 were, and still are, released into the environment from nuclear facilities, in particular from ...
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Artículo
Analysis of 236U and plutonium isotopes, 239,240Pu, on the 1 MV AMS system at the Centro Nacional de Aceleradores, as a potential tool in oceanography
Chamizo Calvo, Elena; López Lora, Mercedes; Villa Alfageme, María; Casacuberta, N.; López Gutiérrez, José María; Pham, Mai Khanh (ScienceDirect, 2015-10-15)The performance of the 1 MV AMS system at the CNA (Centro Nacional de Aceleradores, Seville, Spain) for 236U and 239,240Pu ...
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Artículo
Analysis of a major Aeolian dust input event and its impact on element fluxes and inventories at the DYFAMED site (Northwestern Mediterranean)
Más Balbuena, José Luis; Martín, Jacobo; Pham, Mai Khanh; Chamizo Calvo, Elena; Miquel, Juan-Carlos; Povinec, Pavel P.; Eriksson, Mats; Villa Alfageme, María (Elsevier, 2020-06)Continental dust can be suspended and transported by the wind, reaching seawater masses far away from its source. The ...
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Artículo
Arctic observations identify phytoplankton community composition as driver of carbon flux attenuation
Wiedmann, I.; Ceballos Romero, Elena; Villa Alfageme, María; Renner, A.H.H.; Dybwad, C.; Van der Jagt, H.; Svensen, C.; Assmy, P.; Wiktor, J.M.; Tatarek, A.; Różańska-Pluta, M.; Iversen, M.H. (Wiley, 2020)he attenuation coefficient bis one of the most common ways to describe how strong the carbonflux is attenuated throughout ...
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Artículo
Comparison of Solvent Extraction and Extraction Chromatography Resin Techniques for Uranium Isotopic Characterization in High-Level Radioactive Waste and Barrier Materials
Hurtado Bermúdez, Santiago José; Villa Alfageme, María; Más Balbuena, José Luis; Alba Carranza, María Dolores (Elsevier, 2018-07)The development of Deep Geological Repositories (DGP) to the storage of high-level radioactive waste (HLRW) is mainly ...
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Artículo
Competitive effect of the metallic canister and clay barrier on the sorption of Eu3+ under subcritical conditions
El Mrabet, Said; Castro Arroyo, Miguel Ángel; Hurtado Bermúdez, Santiago José; Orta Cuevas, María del Mar; Pazos, Mariana Carolina; Villa Alfageme, María (Elsevier, 2014)An in depth knowledge and understanding of high activity radionuclide (HLRW) immobilization processes on the materials ...
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Artículo
Contamination and restoration of an estuary affected by phosphogypsum releases
Villa Alfageme, María; Mosqueda, F.; Hurtado Bermúdez, Santiago José; Mantero Cabrera, Juan; Manjón Collado, Guillermo; Periáñez Rodríguez, Raúl; Vaca, F.; García-Tenorio García-Balmaseda, Rafael (Elsevier, 2009)The Huelva Estuary in Huelva, Spain, has been one of the most studied environmental compartments in the past years from ...
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Libro
Descifrando los océanos: el secreto está en la física
Villa Alfageme, María (Editorial Universidad de Sevilla, 2023)Este libro explora, de una forma amena, cómo la física puede ayudarnos a entender los océanos y proteger nuestro planeta. ...
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Artículo
Determination of trace element concentrations and stable lead, uranium and thorium isotope ratios by quadrupole-ICP-MS in NORM and NORM-polluted sample leachates
Más Balbuena, José Luis; Villa Alfageme, María; Hurtado Bermúdez, Santiago José; García-Tenorio García-Balmaseda, Rafael (Elsevier Science BV, 2012)This works focus on the monitoring of the potential pollution in scenarios that involves NORM related industrial activities ...
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Artículo
Effect of clays and metal containers in retaining Sm3+ and ZrO2+ and the process of reversibility
El Mrabet, Said; Castro Arroyo, Miguel Ángel; Hurtado Bermúdez, Santiago José; Orta Cuevas, María del Mar; Pazos, M. Carolina; Villa Alfageme, María; Alba, María D. (Walter de Gruyter, 2014)Knowledge and understanding about radionuclides retention processes on the materials composing the engineered barrier (clay ...
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Ponencia
Geochronology of recent sediments from the Cariaco Trench (Venezuela) by Alpha Spectrometry of 210Pb (210Po)
Arriojas, Argenis; Barros, Haydn; Palacios, Daniel; Hurtado Bermúdez, Santiago José; Villa Alfageme, María; Pérez, Kriss; Alfonso, Juan Andrés; Sajó-Bohus, László (American Institute of Physics, 2010)210Pb concentration in marine sediments of the Cariaco Trench (North‐East of Venezuela) was measured through the analysis ...
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Artículo
Geographical, seasonal, and depth variation in sinking particle speeds in the North Atlantic
Villa Alfageme, María; Soto, Feliciano de; Ceballos Romero, Elena; Giering, Sarah; Le Moigne, Frederic; Henson, Stephanie; Mas, Jose Luis; Sanders, Richard (AGU Publications, 2016-08)Particle sinking velocity is considered to bea controlling factor for carbon transport to the deep sea and thus carbon ...
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Ponencia
Measurement of 210Pb and its application to evaluate contamination in an area affected by NORM releases
Mosqueda Peña, Fernando; Villa Alfageme, María; Hurtado Bermúdez, Santiago José; Absi, Abdeslam; Manjón Collado, Guillermo; Vaca Galán, Federico; García-Tenorio García-Balmaseda, Rafael (American Institute of Physics, 2008-08-07)Liquid scintillation counting (LSC) is an easy and straightforward technique, and combined with its low limit of detection, ...
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Artículo
Modeling of 226Ra behavior in a Spanish estuary affected by the phosphate industry
Periáñez Rodríguez, Raúl; Absi, Abdeslam; Villa Alfageme, María; Moreno González, Helena Patricia; Manjón Collado, Guillermo (Springer, 2007)The Odiel and Tinto rivers, southwest Spain, form a fully mixed estuary. An industrial area that includes a complex dedicated ...
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Artículo
Natural and artificial radionuclides in a marine core. First results of 236U in North Atlantic Ocean sediments
Villa Alfageme, María; Chamizo Calvo, Elena; Santos Arévalo, Francisco Javier; López Gutiérrez, José María; Gómez Martínez, Isabel; Hurtado Bermúdez, Santiago José (ScienceDirect, 2018-06)There are very few data available of 236U in marine sediment cores. In this study we present the results from the first ...
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Ponencia
Observations and modeling of slow-sinkingparticles in the twilight zone
Villa Alfageme, María; Soto, F. de; Le Moigne, Frederic; Giering, Sarah; Sanders, Richard; García-Tenorio García-Balmaseda, Rafael (2013-08)The biological carbon pump (BCP) transfers carbon from the surface ocean into the oceans’interior,mainly in the form of ...
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Artículo
On the proportion of ballast versus non-ballast associated carbon export in the surface ocean
Le Moigne, Frédéric A. C.; Sanders, Richard J.; Villa Alfageme, María; Martin, Adrian P.; Pabortsava, Katsiaryna; Planquette, Hélène; Morris, Paul J.; Thomalla, Sandy J. (Wiley, 2012-08)The role of biominerals in driving carbon export from the surface ocean is unclear. We compiled surface particulate organic ...