The thermodynamical properties of the main phases of metallic polonium are examined using density functional theory. The exceptional nature of the solid-solid phase transition of alpha to beta Po is underlined: it induces a lowering in symmetry, from cubic to rhombohedral, with increasing temperature. This is explained as the result of a delicate balance between bonding and entropic effects. Ov...

The aim of this study was to test a possible use of Urtica dioica (common nettle) plant as a biomonitor of polonium (210)Po and lead (210)Pb contamination near phosphogypsum stacks by determining concentrations of these radionuclides in samples collected from the area of phosphogypsum stockpile in Wiślinka (northern Poland). The (210)Po and (210)Pb contents in roots depended on their concentrat...

1922 Isolation and Characterization of a Cytosol Protein 1990 (64/7.2) Present in Large Amounts in Rapidly Grow ing Hepatomas. Katari S. Raju, Ann Cartwright, Friedrich W. Hirsch, Benjamin C. Wu, Katrina N. Nail, Harold P. Morris, and Harris Busch. Interactions between Polonium-210 «-Radiation, Benzo(a)pyrene, and 0.9% NaCI Solution Instilla tions in the Induction of Experimental Lung Cancer. ...

210Po, a naturally occurring radioisotope that is ubiquitous in seawater, is especially enriched in proteinaceous tissues of marine organisms and may therefore be useful as a tracer of organic carbon flux in marine systems. Due in part to its biomagnification in marine food chains, 210Po provides the largest radiation dose to any organism under natural conditions. To better understand the exten...