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Bacterial Alpha-Amylase Enzymes Used in Desizing, Assay Of
standard by American Association of Textile Chemists and Colorists,
Description
1. Purpose and Scope
1.1 This test method is intended for the assay of bacterial amylases employed commercially for textile desizing. It is not applicable to products which contain beta-amylase in addition to alpha-amylase.
2. Principle
2.1 Dextrogenic amylase activity is measured in terms of digestion time required to produce a color change denoting a definite stage of dextrinization of the starch substrate. The amylase content of the sample, expressed in Bacterial Amylase Units (BAU), is readily calculated from the dextrinizing time.
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