Buscar
Mostrando ítems 1-10 de 647
An alternative methodology to determine 210Pb activity soil profiles
(Elsevier, 2019-11)
Unsupported 210Pb (Pbexc) is generated in air and is subsequently deposited on soil surface. The Pbexc can be used for sediment dating, soil erosion/sedimentation and air mass studies.In many cases, 210Pb activity determination ...
Mobility indices and doses from 210Po and 210Pb activity concentrations data in Brazilian spas groundwaters
(2017-06-01)
210Po and 210Pb activity concentrations in spas groundwaters occurring at São Paulo (SP) and Minas Gerais (MG) states, Brazil, have been reported in this paper with a dual purpose: to compare different indices for evaluating ...
Dissolved Po-210 and Pb-210 in Guarani aquifer groundwater, Brazil
(Pergamon-Elsevier B.V. Ltd, 2009-03-01)
The huge Guarani aquifer located in the South American continent is a very important resource for the region, and its drinking water quality has been investigated according to international standards, inclusive radiological ...
Dissolved Po-210 and Pb-210 in Guarani aquifer groundwater, Brazil
(Pergamon-Elsevier B.V. Ltd, 2009-03-01)
The huge Guarani aquifer located in the South American continent is a very important resource for the region, and its drinking water quality has been investigated according to international standards, inclusive radiological ...
Growth rates in modern speleothems from Santana Cave, Brazil, by the Pb-210-method
(Pergamon-Elsevier B.V. Ltd, 2012-02-01)
The Santana Cave is located at the Upper Ribeira Touristic State Park (PETAR-Parque Estadual Turistico do Alto Ribeira) in southern São Paulo State, Brazil. This paper describes Pb-210 activity concentration data in soda ...
Growth rates in modern speleothems from Santana Cave, Brazil, by the Pb-210-method
(Pergamon-Elsevier B.V. Ltd, 2012-02-01)
The Santana Cave is located at the Upper Ribeira Touristic State Park (PETAR-Parque Estadual Turistico do Alto Ribeira) in southern São Paulo State, Brazil. This paper describes Pb-210 activity concentration data in soda ...
Identifying sedimentation processes in the Coata River, Altiplano of the Puno department, Peru, by the 210Pb method
(2019-11-01)
The rivers, lakes and dam sediment analyses are able to predict the back conditions of these ecosystems and determine how the environment changed as a result of anthropogenic activities. In this way they can be used as ...
Behavior of PtPb/MgAl2O4 catalysts with different Pb contents and trimetallic PtPbIn catalysts in n-butane dehydrogenation
(Elsevier, 2013-08)
The behavior of PtPb/MgAl2O4 catalysts in butenes production through the n-butane dehydrogenation has shown that at low contents, the Pb acts as promoter, improving the conversion and selectivity, whereas at higher contents ...
Growth rates in modern speleothems from Santana Cave, Brazil, by the Pb-210-method
(Pergamon-Elsevier B.V. Ltd, 2014)
Sedimentation rates in Atibaia River basin, São Paulo State, Brazil, using Pb-210 as geochronometer
(Pergamon-Elsevier B.V. Ltd, 2011-01-01)
The constant initial concentration (CIC) of unsupported/excess Pb-210 model was successfully used to assess Pb-210 data of nine sediment cores from Atibaia River basin São Paulo State Brazil The Pb-210-based apparent ...