TY JOUR TI STUDY OF SOME PHYSICOCHEMICAL PROPERTIES OF AMORPHOUS SILICON DIOXIDE OBTAINED FROM NEPHELINE AND THE POSSIBILITY OF ITS USE AS AN ENTEROSORBENT KW nepheline KW amorphous silica KW sorption KW intestinal sorbent JO Russian Journal of Biological Physics and Chemisrty AU Velyaev, Y.O. AU Kometiani, I.B. AU Bulatnikova, E.A. PY 2019 IS PB Federal State Educational Institution of Higher Education Sevastopol State University