Description
Pickling and curing preserve foods by lowering pH, reducing water activity, and adding salt or nitrite to inhibit microbial growth.
Technical
Acidified brines (acetic or lactic acid) drop the pH below 4.6, denaturing bacterial enzymes and preventing Clostridium botulinum germination. High salt concentrations create an osmotic gradient that extracts moisture, lowering water activity (a_w) below 0.90, while nitrite reacts to form nitric oxide, which binds myoglobin as nitrosylmyoglobin, stabilizing color and inhibiting spoilage organisms.
Science
Primary Reaction
Acidification and osmotic dehydration (with nitrosylation in cured meats)
Sensory Profile
Aroma ()
tangysoursaltyumamifermented
Origin & History
Civilization
Chinese
Era
Tang dynasty (7th–10th century)