Physico-chemical properties and research of acids contained in oils of Uzbekistan Sh. Arslanov, S. Turabdjanov, Sh. Azimova, D. Azimov, N. Sultankhojaeva and E. Egamberdiev E3S Web Conf., 371 (2023) 01021 Published online: 28 February 2023 DOI: 10.1051/e3sconf/202337101021