In vitro method for thoroughly evaluating protein biomass amount in babies' formula milk powder
An infant formula and biological quality technology, applied in the field of protein biological quality evaluation, can solve the problems such as the inability to calculate the digestion of each amino acid, the lack of comparison of the recommended amounts, the failure to reflect the changes in gastric acidity and the speed of gastrointestinal peristalsis.
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[0027] The following examples describe the present invention in more detail:
[0028] 1. Evaluation of Sample Processing
[0029] Taking commercially available infant formula milk powder as the processing object, the protein content in the milk powder was measured and prepared into a 12% liquid sample; 100 ml of the sample was taken and preheated and kept at 37°C for use.
[0030] 2. Preparation and use of gastric juice
[0031] The gastric juice is composed of 0.8mg / ml pepsin, 1.2mg / ml rennet, and 0.088mol / LH + composition. Use the method described in Table 3
[0032] table 3
[0033]
[0034] After the gastric juice was treated for 1 hour, the pH was adjusted to neutral with 1M sodium hydroxide solution, and the above process was completed by peristaltic stirring with a peristaltic pump.
[0035] 3. Preparation and use of intestinal juice enzymes
[0036] 0.8g trypsin, 1.2g rennet and then add 5g bile salt. Intestinal juice enzymes were added to the gastric juice-t...
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