TY JOUR TI ELECTROCHEMICAL MODELING DIFFUSION OF CATECHOLAMINES IN DIFFERENT COMPOSITION OF HYDROGEL MEDIA KW adrenaline KW dopamine KW poly (toluidine blue) KW guar gum KW polyacrylamide KW cyclic voltammetry JO Russian Journal of Biological Physics and Chemisrty AU Gil'fanov, R.M. AU Cherenkov, I.A. AU Sergeev, V.G. AU Ivanova, I.L. PY 2019 IS 4 PB Federal State Educational Institution of Higher Education Sevastopol State University