Micro-scale Method for Determining Foaming Properties of Protein
1997
A 5% protein suspension (4 mL) was whipped in a modified 50-mL centrifuge tube using a tissumizer equipped with a flat-bottom generator. Drainage time at 50% liquid weight and the weight of the foam formed/ unit volume were used for calculating foam stability and foam overrun, respectively. The foaming properties of a variety of milk proteins were determined using this method. This method distinguished differences in foaming properties among the proteins. Values for overrun confirmed published results. Compared with standard methods, this method required much less sample (about 1/20) and less measuring time (about 1/5 to 1/10).
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