5bio5: Rare earth elements (Ce, Nd, U, Hf, Cs, Au) in biodetritus. First paper to report concentrations of a number of rare earth elements (Ce, Nd, U, Hf, Cs , Au) in biological detritus in an aquatic system. Scientific article: S.A.Ostroumov, G.M.Kolesov. The role of biodetritus in accumulation of high-tech elements in aquatic ecosystems. Gold, uranium.