TY JOUR TI Rheological study of water solutions molecular mass fractions (PVP) of polyvinylpyrrolidone KW polyvinylpyrrolidone KW Huggins constant KW viscosity JO Russian Journal of Biological Physics and Chemisrty AU Masimov, E.A. AU Bagirova, S.R. AU Hasanova, K.T. PY 2021 IS 6 PB Federal State Educational Institution of Higher Education Sevastopol State University