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  • Author or Editor: G. Somogyi x
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Abstract  

The passive transport processes in plants of22Na+,137Cs+,45Ca2+,65Zn2+,59Fe3+ and32PO 4 3− ions and the plant-protecting agent “Saphidon (14C)” were studied by a radioabsorption method. The parameters of the passive transport processes of212Pb2+, borate and tetraborate ions in plants were measured by quantitative microradiographic methods, using photoemulsion and solid state nuclear track detectors. Ion diffusion concentration profiles within the plants were determined at various diffusion times and temperatures. The equation of linear diffusion combined with convection was used to determine the diffusion coefficients characteristic of the transport processes.

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Abstract  

The possibility of quantitative boron determination via (n,α) reaction in silicon and B2O3+PVA samples has been studied. As alpha-sensitive track detector Makrofol-E polycarbonate foil and as neutron source lmg252Cf with a cadmium ratio of 8 were applied. It was shown that, if the lowest acceptable track density was 103 tracks cm−2 the method could be used to measure B concentrations down to 1 ppm.

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