TY JOUR TI REFRACTOMETRY IN THE STUDY OF SELECRIVITY OF VEGETABLE EXTRACTANTS KW vegetable oils KW oil blends KW oil extracts KW vegetable raw materials KW refractometry method JO Russian Journal of Biological Physics and Chemisrty AU Nechiporenko, A.P. AU Nechiporenko, U.Y. AU Plotnikova, L.V. AU Melnikova, M.I. AU Uspenskaya, M.V. PY 2018 IS 3 PB Federal State Educational Institution of Higher Education Sevastopol State University