Assertion: amylase's activity | /r/CapableOf | remain at the end of the 19th day
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text: The results indicate that when a dilute water solution of bacterial amylase (0.05%) (no sodium chloride added) is stored at room temperature, the amylase activity progressively decreases until no activity remains at the end of the 19th day, while a thermally treated enzyme solution, which contains 3% (0.5M) sodium chloride, exhibits no major change in the bacterial alpha-amylase activity during a 31 day storage period.