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AATCC 103-2009
- Bacterial Alpha-Amylase Enzymes Used in Desizing, Assay Of
- standard by American Association of Textile Chemists and Colorists,
- Publisher: AATCC
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1. Purpose and Scope1.1 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. Principle2.1 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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