Radioactivity Concentration Ratio Research Articles

Transport of radioactivity in rain and air across the trade wind inversion at Hawaii

Radiochemical analyses of aerosols and precipitation collected along the slopes of Mauna Loa volcano in Hawaii show that the concentration of radioactivity in aerosols generally increases with height across the trade wind inversion. The time variations of the vertical distribution of radioactivity concentration and moisture mixing ratio were inversely correlated; intrusions of dry air having higher concentrations of radioactivity accompanied vertical oscillations in the upper boundary of the moist surface layer. The concentration of Sr90 in rain along the slopes generally decreased with altitude above the cloud base. This decrease is attributed to the continuous depletion of condensation nuclei through rainout while remaining droplets in the air parcels continue to grow as they move upslope.

DISTRIBUTION IN THE RAT OF PARTIALLY DENATURED IODINATED SERUM ALBUMIN.

The distribution of heated radioiodinated human serum albumin (IHSA) was investigated in the rat.Increase in duration of heat treatment at 70 °C resulted in increased liver uptake. The fraction of the injected dose remaining in the blood decreased with increase in duration of heat treatment.Similarly, increase in temperature of heating from 65 °C to 75 °C resulted in increased liver uptake. The fraction of the injected dose remaining in the blood decreased with increase in temperature of heating.The liver:blood radioactivity concentration ratios provide an index of the degree of heat denaturation of iodinated human serum albumin preparations.