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Water activityaw.
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Water activityMeasures the amount of available (free) water in foods. Water activity ranges from 0 to 1.00, which is pure water. Water activity is one of the single most important concepts in food safety today. Lim [..]
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Water activityWater Activity: A measure of the amount of moisture bacteria need to grow; often written as Aw; was has a Aw of 1.0, and any food with an Aw of 0.85 or greater is considered potentially hazardous.
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Water activity(aW) - A relative measure of the amount of water that is not bound to salt, sugar, proteins, carbohydrates, and other food constituents and thus is available for microorganisms to use. Pure water, in which all water molecules are available, has a water activity of 1.0. Salts, sugars, and complex molecules such as proteins and carbohydrates compete [..]
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