| 摘要 |
A process for treating a protein to protect it against bacterial degradation in the alimentary tract of animals, comprises reacting the protein and a tanning agent in a moist medium at below 70 DEG C. until substantially no soluble nitrogen remains and drying the product at a temperature not greater than 80 DEG C. The tanning agent may be natural or synthetic, e.g. aldehydes, quinones, polyphosphates, sulphited cellulose, fatty materials, mineral salts or tannins obtained from chestnut, oak, myrobalan, valonia, quebracho, mimosa, eucalyptus and mangrove. In Example (4), milk casein is reacted with chestnut tannin; in Example (5) blood meal with chestnut tannin; in Example (15) blood meal with myrobalan tannin; and in Example (16) gelatin with mimosa tannin.ALSO:An animal feed comprises a nitrogenous animal foodstuff which has been protected against bacterial deamination by a process comprising reacting the nitrogenous foodstuff and a tanning agent in a moist medium at below 70 DEG C. until substantially no soluble nitrogen remains and drying the product at a temperature not greater than 80 DEG C. the nitrogenous foodstuff may be a protein (e.g. casein and gelatin), a proteinaceous material (many examples listed) or a compound from which animals can synthesise proteins (e.g. urea or glycine). The tanning agent may be natural or synthetic, e.g. aldehydes, quinones, polyphosphates, sulphited cellulose, fatty materials, mineral salts or tannins obtained from chestnut, oak, myrobalan, valonia, quebracho, mimosa, eucalyptus and mangrove. The foodstuff and tanning agent may be mixed dry and then water is added or the foodstuff and tanning agent may be formed into aqueous solutions which are subsequently mixed. |
