Description
Mechanical shear forces rupture plant cell walls, releasing essential oils and creating colloidal suspensions of spice particles in expressed liquids.
Technical
Trituration fractures lignified spice structures while shear forces from the pestle's grinding action emulsify hydrophobic compounds (like curcuminoids and capsaicin) with hydrophilic components (plant juices, water). The process generates heat (≈5-8°C increase) which volatilizes thiols and terpenes.
Culinary Significance
Produces more vibrant, layered flavors than powdered spices by preserving volatile aromatics that would be lost in industrial grinding. The paste's texture helps it cling to proteins during cooking.
Science
Primary Reaction
Mechanical cell lysis
Parameters
Temperature
28°C optimal
18°C to 45°C range
Time
12 minutes
5 minutes – 25 minutes
Equipment