Investigation of gold content in the bio-oxidation processTulkin Nurmurodov, Nodira Saidova, Oybek Ashurov, Gulrukh Rakhimova, Omon Fuzaylov and Jakhongir NarzullaevE3S Web Conf., 417 (2023) 02011DOI: https://doi.org/10.1051/e3sconf/202341702011