Description
Tribochemical process releasing bound volatiles through shear-force induced cell rupture.
Technical
Mechanical disruption of plant cell walls (particularly in galangal rhizomes and candlenuts) facilitates enzymatic reactions between released polyphenol oxidases and phenolic substrates. Stone-on-stone friction generates localized heat (40-50°C) that partially denatures protease inhibitors in shallots.
Culinary Significance
Creates deeper flavor integration than blade-chopping by preserving volatile oil droplets in a starch-stabilized emulsion from bruised aromatics.
Science
Primary Reaction
Tribochemical reaction
Parameters
Temperature
30°C optimal
26°C to 34°C range
Time
12 minutes
5 minutes – 25 minutes
Equipment
Granite mortar (minimum 15kg)Teak pestle (45-50cm length)Banana leaf lining (pH 6.5-7.0)