Abstract:Summary -In an attempt to obtain ISN-labelling milk proteins for digestive studies in humans, labelled ammonium sulphate [eSNH4)2S04] was incorporated in the diet of dairy cattle. Cows were fed a total mixed ration including 300 g (NH4)2S0 4' In trial l, three cows received a single dose of 50, 150 or 300 g (lSNH4)zSO 4 in substitution for an equal dose of non-labelled product. In trial 2, three cows received 300 g (ISNH4)2S0 4 the first day plus 150 g 24 h and 150 g 48 h after the initial supply. Feed intake,… Show more
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