The effect of the “Biological inactivator of toxic gases” on the formation of ammonia and homeostasis indicators in the cold method of calf rearingP.N. Shcherbakov, K.V. Stepanova, T.N. Shnyakina, T.B. Shcherbakova and P.V. BurkovE3S Web Conf., 282 (2021) 03013DOI: https://doi.org/10.1051/e3sconf/202128203013