| abstract |
The present invention is directed to rumen-bypass preparations fornruminants composed of a core preparation and a coating layer appliednthereonto, characterized in that the core preparation contains from 50nto 90% by weight, based on the core preparation, of a biologically-activensubstance, that the active substance has been dispersed in fromn10 to 50% by weight of a protective substance, and that the coatingnlayer applied onto the core preparation is made of from at least onenmaterial selected among linear and branched, saturated and unsaturatednaliphatic C 12-24 monocarboxylates, polymers insoluble in the neutralnregion but soluble in the acidic region, and zein. Use of protectivensubstances originating in natural substances and being harmless to thenecological system makes it possible to obtain rumen-bypass preparationsnwhich contain biologically-active substances at a high concentration andnare advantageous economically. |