This curve shows how growth of microorganisms, production of toxins, and physicochemical reactions are affected by water activity. Dried foodstuffs are most stable at a water activity of about 0.2.

• 该曲线说明了水分活度对影响微生物的生长、毒素的产生和物理化学反应的影响。水分活度0.；2左右的干燥食品最稳定。