TY JOUR TI STIMULATING AND TOXIC EFFECTS OF COPPER AND COBALT NANOPOWDERS ON RICE SEEDLINGS KW JO Bulletin of Nizhnevartovsk State University AU Obidina, I.V. AU Churilov, G.I. AU Polischuk, S.D. AU Tarara, A.Y. AU Gomozova, S.S. AU Rybin, N.B. AU Ampleeva, L.E. PY 2020 IS PB Nizhnevartovsk State University