Kaufmann and his collaborators examined the stomach content of minipigs after feeding with 1.5
l (later 0.75
l) of raw, pasteurized, UHT and soured milk. Raw milk and pasteurized milk formed a very firm curd and showed the slowest gastric emptying rate. UHT milk and soured milk formed a soft curd and passed the stomach much more rapidly.
However, the slowest emptying rate did not mean a physiological process, as the curd contained the milk constituents derived from feeding 15 hours before observation.
The above - mentioned result was confirmed only in the experiment after feeding of 1.5
l of milk, and not in the experiment after feeding of 0.75
l of milk. Though the coordinator Kaufmann concluded as thus in the sixth paper of the series, the collaborators Meisel and Hagemeister reported the promoted emptying rate without change in its order in the feeding experiment with 0.75
l of milk in the second paper of the series in which, however, no numerical data giving security for their conclusion were given.
Attaching greater weight to the coordinator's conclusion, it will be concluded that a series of Kaufmann's experiments should not be cited as a proof of the superiority of raw milk to UHT milk with regard to the digestion in the stomach and or in the intestine within the range of the amount of usual daily intake.
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