초록 ▼

A water soluble glass article suitable for treating a diet deficiency in a ruminant animal. Animals are treated by lodging in the reticulo rumen an article containing (a) P2O5 (b) R2O where R is chosen from Na, K and Li (c) at least one other glass forming or modifying material, usually CaO, MgO or

A water soluble glass article suitable for treating a diet deficiency in a ruminant animal. Animals are treated by lodging in the reticulo rumen an article containing (a) P2O5 (b) R2O where R is chosen from Na, K and Li (c) at least one other glass forming or modifying material, usually CaO, MgO or Al2O3 (d) at least one deficiency-rectifying element selected from Cu, Se, Co, Zn, I, Mn and Mg. In the composition the sum of P2O5 and R2O is not less than 56 mol %, and not more than 76 mol % if CuO and/or ZnO are present or not more than 92 mol % if CuO and/or ZnO are absent and one or more of CoO, SeO and I is present. If CuO and/or ZnO is present then the amount of each of P2O5 and R2O (preferably present in substantially equimolar amounts) does not exceed 45 mol %. The composition is such that when the article is present in the reticulo rumen the article has a release rate of not more than 25 mg per square centimeter of article surface area per day, so making possible articles which can be administered to the animal to release the required element or elements over periods up to one year or more.

대표청구항 ▼

A water soluble glass article in a form suitable for administration to a ruminant animal, the article containing: (a) P2O5 (b) R2O where R is chosen from Na, K and Li (c) at least one other glass modifying or forming material (d) at least one deficiency-rectifying element combined in the glass, said

A water soluble glass article in a form suitable for administration to a ruminant animal, the article containing: (a) P2O5 (b) R2O where R is chosen from Na, K and Li (c) at least one other glass modifying or forming material (d) at least one deficiency-rectifying element combined in the glass, said element being selected from Cu, Se, Co, Zn, I, Mn and Mg in which: when CuO is present in the glass the content of each of P2O5 and R2O does not exceed 45 mol%; when at least one of CuO and ZnO is present in the glass the sum of the quantities of P2O5 and R2O is in the range of 56-76 mol%; when CuO and ZnO are absent and at least one of MgO, CoO, SeO and I is present in the glass the sum of the quantities of P2O5 and R2O is in the range of 56-92 mol%; and the composition being such that when the glass article is present in the reticulo rumen of the animal the article has a release rate of not more than 25 mg per square centimeter of article surface area per day. A method of forming a water-soluble glass article according to claim 1 comprising mixing as batch ingredients (i) a compound selected from sodium metaphosphate and sodium hexametaphosphate (ii) at least one other glass forming or modifying material (ii) at least one material incorporating a deficiency-rectifying element selected from Cu, Se, Co, Zn, I, Mn and Mg, heating the materials to a glass forming temperature and forming the glass composition into an article of the required physical form.