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The promoting effect of cesium on structure and morphology of silver catalysts Anais da ABC (AABC)
Carvalho,Marta C. N. A.; Perez,Carlos A.; Simão,Renata A.; Passos,Fabio B.; Schmal,Martin.
Silver supported catalysts on alpha-alumina were prepared and characterized by Brunauer-Emmet-Teller equations, scanning electronic microscopy, X-ray diffraction and atomic force microscopy techniques. Results show that these are powerful techniques for the determination of texture, morphology and surface properties. It has been shown that the addition of Cs in the Ag/Al2O3 catalyst increased the dispersion of silver with the formation of small silver particles over a thin silver film already formed over the alumina support. It is important to stress that atomic force microscopy measurements are significant to observe the film and the dispersion of Ag and, on the contrary, X-ray photoelectronic spectroscopy did not, however, it allows to the conclusion...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Silver; Cesium; Catalyst; AFM; XPS.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652004000100003
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Etude du comportement des éléments traces en milieu estuarien : approche expérimentale et modélisation : Application à l'étude de la spéciation de Cd, Co et Cs dans les estuaires majeurs français (Seine, Loire, Gironde, Rhône) ArchiMer
Dange, Catherine.
Most of trace elements have a non conservative behavior in estuarine environments. It is the case of cadmium, cobalt and caesium for which the fate in estuarine and coastal zones is largely controlled by their distribution between water and suspended particles, which generally have high residence times or can be definitely deposited in these areas. Metallic contaminants and radionuclides can be present under various species : dissolved (mineral and organic complexes), colloidal and particulate forms (adsorbed, precipitated) or integrated by various mechanisms in the organisms. Such distributions are the result of processes (physical, chemical, biological) which are controlled by many factors (ionic strengh, pH, Eh, major cations concentration, nature and...
Tipo: Text Palavras-chave: Modeling; French estuaries; Caesium; Cobalt; Cadmium; Radionuclides; Trace metals; Speciation; Modélisation; Estuaires français; Cesium; Cobalt; Cadmium; Radionucléides; Métal trace; Speciation.
Ano: 2002 URL: http://archimer.ifremer.fr/doc/2002/these-183.pdf
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Early-Stage Bioassay for Monitoring Radioactive Contamination in Living Livestock OAK
YAMAGUCHI, Toshiro; SAWANO, Kaita; KISHIMOTO, Miori; FURUHAMA, Kazuhisa; YAMADA, Kazutaka; 山田, 一孝.
Soil samples from the ground surface and feces and blood from a mixed-breed male pig were collected on April 10, 2011 at a farm within 20 km of the Fukushima Daiichi nuclear power plant. The radioactivity of each sample was measured using a Ge semiconductor detector. Despite the fact that the pig had been fed non-contaminated imported feed, 131I, 134Cs and 137Cs were detected in the feces, and 134Cs and 137Cs were detected in the blood clots. Because it is considerably difficult to measure radioactive contamination in the edible muscle of living livestock, bioassays are an option for the screening of radioactive contamination in living livestock to ensure food safety.
Palavras-chave: Bioassay; Cesium; Fukushima; Iodine; Radioactive contamination.
Ano: 2012 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/3893
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An Autoradiogram of Skeletal Muscle from a Pig Raised on a Farm within 20 km of the Fukushima Daiichi Nuclear Power Plant OAK
YAMAGUCHI, Toshiro; SAWANO, Kaita; FURUHAMA, Kazuhisa; MORI, Chizuo; YAMADA, Kazutaka; 山田, 一孝.
We utilized autoradiography to visualize radioactive contamination in the skeletal muscles of a pig raised within 20 km of the Fukushima Daiichi nuclear power plant following the nuclear accident. The autoradiogram of control muscle showed relatively homogenous exposure. In contrast, the autoradiogram of affected muscle showed a heterogeneous and sporadically dense imaging pattern. Photo luminescence densities of the affected and control muscles were 3.89 ± 0.67 and 2.13 ± 0.43 PSL/mm2, respectively. This difference indicated that radioactive cesium was distributed in the skeletal muscle of the affected pig.
Palavras-chave: Autoradiography; Cesium; Potassium; Radioactive contamination.
Ano: 2013 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/3900
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