What You Need to Know
Canning destroys Clostridium botulinum spores by applying 121 °C pressure for low‑acid foods or 71 °C for high‑acid foods, relying on thermal denaturation of proteins. Pickling creates an environment with pH ≤ 4.6 using 5–7 % acetic acid and 10 % NaCl, inhibiting bacterial enzymes and promoting lactic fermentation. Curing combines 2–3 % salt with 0.05–0.1 % nitrates/nitrites, which form nitrosylmyoglobin and suppress Clostridium spp., while also drawing moisture out via osmotic pressure.
Steps
- 1.
Kimchi (Korea): Lacto-fermentation creates signature tanginess while preserving vegetable crunch
- 2.
Parma Ham (Italy): Air-drying concentrates umami flavors through controlled enzymatic breakdown
- 3.
Sauerkraut (Germany): Salt-driven fermentation transforms cabbage into tart, probiotic-rich staple
The Science
Primary Reaction
thermal inactivation of spores, acidification, osmotic dehydration, nitrite‑mediated nitrosylation