TY JOUR TI COMPARATIVE ANALYSIS OF INFLUENCE OF pH ON THE LEVEL OF THE ACTIVITY OF DIGESTIVE ENZYMES OF RUSSIAN STURGEON, SIBERIAN STURGEON AND THEIR HYBRID BY MEANS OF NONMETRIC MULTIDIMENSIONAL SCALING KW sturgeons KW hybrids KW membrane digestion KW digestive enzymes KW pH KW multidimensional scaling JO Vestnik of Astrakhan State Technical University. Series: Fishing industry AU Bednyakov, D.. AU Martyanov, A.. PY 2013 IS 2013 PB Astrakhan State Technical University