# Coccolithophore-associated organic biopolymers for fractionating particle-reactive radionuclides (234Th, 233Pa, 210Pb, 210Po, and 7Be) # PI: Peter H. Santschi # Version 2018-05-15 # Notes: "n.d." denotes lower than detection limit # ot available # NA NAEPS = Non-attached exopol Non-attached exopolymeric substances # AEPS = Attached exopolymeric substances ========================= Biopolymer_Fraction Th234_Activity Pa233_Activity Pb210_Activity Po210_Activity Be7_Activity Protein_Amount TCHO_Amount URA_Amount Protein_C_TCHO_C URA_pcnt_TCHO ------------------------- NAEPS 50 45 30 6 6 23.7 25.7 38.2 0.9 100 AEPS 2 2 n.d. 37 0.6 34.4 5.8 1.3 5.9 22 Coccoliths shell n.d. n.d. 67 n.d. 88 - - - - - Shell associated biopolymer n.d. 1 3 1 5 n.d. 1.3 0.2 0 13 SDS-extractable 20 14 n.d. 17 n.d. 54.7 12.6 3 4.3 24 Fe-Mn associated metabolites 28 38 n.d. 39 0.3 6.2 1 0.3 6.2 28