Also, this stabilizing effect is intensified when complexes are in the solid precipitated form before redissolve, given the lower kinetic constants of inactivation obtained: 1.7e鈭? 卤 2e鈭? and 2.6e鈭? 卤 2e鈭? for polyacrylic acid 240,000 and 100,000, respectively.
In a subsequent step, a strain of A. oryzae was used as enzymatic source. In order to stimulate alpha-amylase production and secretion by the microorganism, we used a minimum culture medium with wheat processing residues as substrate. This has economic and environmental benefits, because of the recycling of agricultural wastes. This culture showed a maximum productivity at the fourth day of incubation.
When the technique of concentration and purification of alpha-amylase was implemented from this culture we obtained purification factors around two and recoveries around 70%. These results demonstrate that this methodology is suitable for the concentration and purification of alpha-amylase from A. oryzae. Besides, it is inexpensive since it uses agricultural materials without commercial value.