Acoustic synthesis of feed proteins under conditions of a complex ultrasonic field Andrei Kochetov, Valentin Minakov, Elena Fisunova, Tatyana Lavrenova and Luybov Filonenko E3S Web Conf., 273 (2021) 13004 Published online: 22 June 2021 DOI: 10.1051/e3sconf/202127313004