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A new approach to analysis of relationships between (137)Cs activity concentrations in forest soil horizons

The measurements results of (137)Cs activity concentrations in forest soil profiles are discussed. In studies some simplifications were considered. First of them concerns disregarding of soil subtype in data analysis. However initially this parameter was considered in data analysis, it was finally i...

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Autor principal: Ziembik, Zbigniew
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer Netherlands 2013
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4514588/
https://www.ncbi.nlm.nih.gov/pubmed/26224950
http://dx.doi.org/10.1007/s10967-013-2828-9
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author Ziembik, Zbigniew
author_facet Ziembik, Zbigniew
author_sort Ziembik, Zbigniew
collection PubMed
description The measurements results of (137)Cs activity concentrations in forest soil profiles are discussed. In studies some simplifications were considered. First of them concerns disregarding of soil subtype in data analysis. However initially this parameter was considered in data analysis, it was finally ignored. The second assumption drops information about specific soil horizon. Description of (137)Cs accumulation is based on relationships between its relative activity concentrations in soil layers. The model formulation was based on the results of exploratory data analysis of the relative (137)Cs activity concentrations. In studies the methods designed for compositional data analysis were used. The results of analysis showed that the relationships between the relative activity concentrations of (137)Cs in soil layers, due to their nature, might be divided into two groups. The first of them concerns layers located close to soil surface. The relative activity concentrations of (137)Cs in these layers are proportional to each other, and distribution mechanism of cesium within them has the characteristics of the process leading to thermodynamic equilibrium. The second group is related to layers that are located deeper. The calculation results suggest lack of thermodynamic equilibrium between these layers and layers situated above. Utilization of a linear model for description of changes in relative activity concentrations of (137)Cs in deeper layers supposes that these changes occur much slower than in layers lying above.
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spelling pubmed-45145882015-07-27 A new approach to analysis of relationships between (137)Cs activity concentrations in forest soil horizons Ziembik, Zbigniew J Radioanal Nucl Chem Article The measurements results of (137)Cs activity concentrations in forest soil profiles are discussed. In studies some simplifications were considered. First of them concerns disregarding of soil subtype in data analysis. However initially this parameter was considered in data analysis, it was finally ignored. The second assumption drops information about specific soil horizon. Description of (137)Cs accumulation is based on relationships between its relative activity concentrations in soil layers. The model formulation was based on the results of exploratory data analysis of the relative (137)Cs activity concentrations. In studies the methods designed for compositional data analysis were used. The results of analysis showed that the relationships between the relative activity concentrations of (137)Cs in soil layers, due to their nature, might be divided into two groups. The first of them concerns layers located close to soil surface. The relative activity concentrations of (137)Cs in these layers are proportional to each other, and distribution mechanism of cesium within them has the characteristics of the process leading to thermodynamic equilibrium. The second group is related to layers that are located deeper. The calculation results suggest lack of thermodynamic equilibrium between these layers and layers situated above. Utilization of a linear model for description of changes in relative activity concentrations of (137)Cs in deeper layers supposes that these changes occur much slower than in layers lying above. Springer Netherlands 2013-11-14 2014 /pmc/articles/PMC4514588/ /pubmed/26224950 http://dx.doi.org/10.1007/s10967-013-2828-9 Text en © The Author(s) 2013 https://creativecommons.org/licenses/by/2.0/ Open AccessThis article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution, and reproduction in any medium, provided the original author(s) and the source are credited.
spellingShingle Article
Ziembik, Zbigniew
A new approach to analysis of relationships between (137)Cs activity concentrations in forest soil horizons
title A new approach to analysis of relationships between (137)Cs activity concentrations in forest soil horizons
title_full A new approach to analysis of relationships between (137)Cs activity concentrations in forest soil horizons
title_fullStr A new approach to analysis of relationships between (137)Cs activity concentrations in forest soil horizons
title_full_unstemmed A new approach to analysis of relationships between (137)Cs activity concentrations in forest soil horizons
title_short A new approach to analysis of relationships between (137)Cs activity concentrations in forest soil horizons
title_sort new approach to analysis of relationships between (137)cs activity concentrations in forest soil horizons
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4514588/
https://www.ncbi.nlm.nih.gov/pubmed/26224950
http://dx.doi.org/10.1007/s10967-013-2828-9
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