Morphological and biochemical parameters of cow blood when using chitosan preparations V.S. Gorelik, M.B. Rebezov, N.L. Lopaeva, E.S. Smirnova and S.K. Sultanova E3S Web Conf., 254 (2021) 08025 Published online: 05 May 2021 DOI: 10.1051/e3sconf/202125408025