As already described the mechanolysis is an useful method for improvement of functional properties of protein preparation caused by changes of structures, splitting of covalent bindings and by combining of mechanolytical and chemical modification [1–3].
In connection with an aimed decomposition of antinutritive compounds of rapeseeds (first of all of glucosinolates) the mechanolysis is not used as far as we know.
For a decrease or destruction respectively of toxic compounds of rapeseeds numerous treatments (processes) have been described inclusing the treatment of seeds or meals with heavy metals [4, 5]. The disadvantage of this „metal treatment” methods is the relatively high amount of needed heavy metals (about 1% or more). In the case of Cu++ this concentration could cause toxic effects in animals after feeding.
By now we have found, that a mechanolytical treatment of rapeseed meal in presence of a comparatively small content of heavy metal ions is a way to reduce the content of VOT and progoitrin of these preparations. Further more the mechanolysis leads to inactivation of myrosinase.