The lung cancer risk of chronic exposure to radioactive radon (Rn) and its decay products through inhalation is well-known.
Within this series of relatively short-lived decay products, gaseous Rn (t1/2 = 55.6 sec) presents a potential challenge to modeling expected increases in total radioactivity resulting from radioactive ingrowth processes.
Ruggedness number (Rn) is the product of basin relief (H) and drainage density (Dd).
The ruggedness number (Rn) is the product of the basin relief and the 'Di' (Strahler 1958) and combines slope steepness with its length and has implications on the structural complexity and erosion potential of the landforms (Vijith and Satheesh 2006).
The RN pattern describing the entire transformation between a reactant pair (Fig. 1) then consists of an RN pattern for the substrate (RNs) and one for the product (RNp).
Partitioning the dose to red bone marrow between the principal emitters suggests that 5% of childhood leukaemia may be linked to Rn, Rn and their short-lived alpha-emitting decay products, and 9% to longer-lived emitters, especially Po.
The overexpression of MPO and the presence of ROS/RNS products indicates that ROS/RNS production by inflammatory cells and fibroblasts within the arthrofibrotic tissue is excessive, due either to increased MPO or to the decreased cellular antioxidant expression of SOD1 and MGST3 or a combination of both.
Taq Man primers and probe for LPL (assay ID: Rn 00561482_ml) and cyclophilin (assay ID: Rn 00690933_ml) were assay-on-demand (AoD) gene expression products selected (Applied Biosystems, Foster City CA, USA).
Nested PCR was also conducted to derive a specific product using P91-PyDes6-RN and P96-PyDes6-RN primers.
Among the decay products of uranium, the most important is Rn, which is responsible for a large part of the radioactivity in the atmosphere.
In these cases, the modeled concentration of Ra decay products will need to include an assessment of Rn emanation and decay to accurately portray the total concentration in liquid drilling wastes and the impact of increased Rn and decay products to surroundings.
