What does water activity mean?
Definitions for water activity
wa·ter ac·tiv·i·ty
This dictionary definitions page includes all the possible meanings, example usage and translations of the word water activity.
Wikipedia
Water activity
Water activity or aw is the partial vapor pressure of water in a substance divided by the standard state partial vapor pressure of water. In the field of food science, the standard state is most often defined as the partial vapor pressure of pure water at the same temperature. Using this particular definition, pure distilled water has a water activity of exactly one. As temperature increases, aw typically increases, except in some products with crystalline salt or sugar. Higher aw substances tend to support more microorganisms. Bacteria usually require at least 0.91, and fungi at least 0.7. See also fermentation. Water migrates from areas of high aw to areas of low aw. For example, if honey (aw ≈ 0.6) is exposed to humid air (aw ≈ 0.7), the honey absorbs water from the air. If salami (aw ≈ 0.87) is exposed to dry air (aw ≈ 0.5), the salami dries out, which could preserve it or spoil it.
Numerology
Chaldean Numerology
The numerical value of water activity in Chaldean Numerology is: 3
Pythagorean Numerology
The numerical value of water activity in Pythagorean Numerology is: 5
Translations for water activity
From our Multilingual Translation Dictionary
- जल गतिविधिHindi
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"water activity." Definitions.net. STANDS4 LLC, 2024. Web. 24 Apr. 2024. <https://www.definitions.net/definition/water+activity>.
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