| 摘要 |
A structural element (2), suitable for use in the manufacture of a release device for intraruminal administration of an active agent to a ruminant animal, is of a compacted material, which material comprises a mixture of powdered iron, graphite and optionally copper, the graphite being present in the mixture in an amount of from 2 to 7wt%, the copper in an amount of from 0 to 5wt% and the iron in an amount of from 88 to 98wt%, by weight of the total weight of iron, copper and graphite. A plurality of structural elements (2) may be assembled to provide a structural unit (4) of a release device. |
