1 The role of PVP in the bioavailability of Ag from the PVP-stabilized Ag nanoparticle 1 suspension 2 3 Tea Romih a , Anita Jemec a, *, Monika Kos a , Samo B. Hočevar b , Slavko Kralj c , Darko 4 Makovec c , Damjana Drobne a 5 6 a Department of Biology, Biotechnical Faculty, University of Ljubljana, Večna pot 111, 1000 7 Ljubljana, Slovenia 8 b Analytical Chemistry Laboratory, National Institute of Chemistry, Hajdrihova 19, 1000 9 Ljubljana, Slovenia 10 c Department for the Synthesis of Materials, Jožef Stefan Institute, Jamova 39, 1000 11 Ljubljana, Slovenia 12 13 14 *Corresponding author: 15 Anita Jemec 16 University of Ljubljana 17 Biotechnical Faculty, Department of Biology 18 Večna pot 111 19 1000 Ljubljana 20 Slovenia 21 Phone: +386 1 320 33 75 22 Fax: +386 1 257 33 90 23 E-mail: anita.jemec@bf.uni-lj.si 24