Activity of thorium-234 {234Th CAS 15065-10-8} per unit volume of the water body [particulate >unknown phase] PartTh234_>unknown Number of disintegrations of 234Th nucleii in the particulate material of any size suspended in unit volume of a water body per unit time 2017-04-19 11:49:10.0 SDN:P01::A234THPX SDN:P01::A234THPX SDN:P01::A234THPX 5 5 2017-04-19 11:49:10.0 accepted false