| neutron activation study of the elementary composition of edible sea urchins (paracentrotus lividus lamarck) in marine creek area polluted by city sewages of marseille (france). | neutron activation study of elementary composition (ag, as, au, ba, br, ce, co, cr, cs, fe, k, la, na, rb, sb, sc, se, sm, sr, th, u and zn) was performed on edible sea urchins (paracentrotus lividus lamarck) from marine creek area polluted by city sewages from marseille (france) after a purifying plant was brought into operation. concentration levels were higher in soft organic parts (alimentary canals and gonads) for all the elements except for sr which showed a strong affinity for calcareous ... | 1995 | 7549790 |