TY JOUR TI ANALYSIS OF INDICATORS OF ENZYME HYDROLYSATES OF FEATHER-DOWN RAW MATERIALS OBTAINED WITH THE USE OF MULTI-ENZYME COMPOSITION KW Feather KW enzymatic hydrolysis KW biosafety KW physical and chemical properties KW feed supplement JO Foods and Raw Materials AU Astakhova, L.A. AU Asyakina, L.K. PY 2017 IS 5 PB Kemerovo State University