Four experiments on Mg(NO 3) 2 produced an average Aw of 0.5229 with a standard deviation of 0.0057. This matches with the literature value of 0.5289. Given that water activity can differ considerably ...

Water availability (water activity (a w)) determines both the vitality and functionality of living systems. The majority of microbes cannot multiply below 0.900 a w (Brown, 1976; Manzoni et al ...

This level of freely available water, called “water activity (aw),” for bacteria is about 0.91, for molds it is 0.8 and for fungi (yeasts), it must be at least 0.6.

Respond to audience questions related to water activity, its applications, and the USP’s intent behind chapters <1112> and <922> Outline a foundation for how and why water activity is a versatile and ...