Rhizospheric mobilization and plant uptake of radiocesium from weathered micas: II. Influence of mineral alterability.

Acute K depletion in the rhizosphere can lead to increased root uptake of radiocesium. Two processes can govern this increase: the very low uptake of potassium and the weathering of Cs-fixing clay minerals. Their respective importance is, however, unknown.

Rhizospheric mobilization and plant uptake of radiocesium from weathered micas: I. Influence of potassium depletion.

Potassium depletion in the soil solution around plant roots promotes the root uptake of radiocesium. However, it can also induce the transformation of mica through the release of interlayer K. In bulk soil, the formation of frayed edge sites (FES) with a high selectivity for Cs adsorption is usually related with mica weathering.

Radiocaesium soil-to-wood transfer in commercial willow short rotation coppice on contaminated farm land.

The feasibility of willow short rotation coppice (SRC) for energy production as a revaluation tool for severely radiocaesium-contaminated land was studied. The effects of crop age, clone and soil type on the radiocaesium levels in the wood were assessed following sampling in 14 existing willow SRC fields, planted on radiocaesium-contaminated land in Sweden following Chernobyl deposition. There was only one plot where willow stands of different maturity (R6S2 and R5S4: R, root age and S, shoot age) and clone (Rapp and L78183 both of age category R5S4) were sampled and no significant differences were found.

Short rotation coppice for revaluation of contaminated land.

When dealing with large-scale environmental contamination, as following the Chernobyl accident, changed land use such that the products of the land are radiologically acceptable and sustain an economic return from the land is a potentially sustainable remediation option. In this paper, willow short rotation coppice (SRC) is evaluated on radiological, technical and economic grounds for W. European and Belarus site conditions.

A note on 'aging-pharmacodynamics' with application to the analysis of the age-dynamics of adipocyte response to epinephrine and insulin.

This note aims at clearing some semantic problems in the literature concerning the analysis of the effect of age on dose-response curves as well as standardize the way such data should be presented. In particular it is shown how to assess the age-dynamics (i.e.