What You Need to Know
Oxalic acid (C2H2O4) chelates calcium ions and disrupts electrostatic interactions in myofibrillar proteins, particularly actin-myosin crossbridges. The pH-dependent process (optimal 2.8-3.2) causes partial unfolding of tertiary structures.
Creates 'cooked' texture in raw seafood while preserving delicate flavors lost during heating.
Key Parameters
Temperature
8°C
4°C - 12°C
Time
8-12 hours
4 hours - 18 hours
Equipment
ceramic or glass containerpH strips (range 1-4)refrigeration
Steps
- 1.
Gravlax Remix (Sweden): Replaces traditional lacto-fermentation for faster, brighter results
- 2.
Sashimi Konservering (Norway): Pre-dressing technique for oily fish like mackerel
The Science
Primary Reaction
acid-induced protein denaturation