Description
Rapid cryogenic freezing of protein solutions with liquid nitrogen creates fine, free‑flowing powders.
Technical
Liquid nitrogen (~‑196 °C) vitrifies the aqueous protein matrix within 30–60 s, suppressing ice‑crystal nucleation and preserving native tertiary structure. The extreme cooling rate (~10⁵ °C·s⁻¹) limits protein aggregation, maintaining solubility and emulsifying functionality. Resulting particles are typically <10 µm, yielding a low‑moisture, free‑flowing powder suitable for downstream spray‑drying or freeze‑drying.
Science
Primary Reaction
Physical vitrification (glass transition) of an aqueous protein solution
Sensory Profile
Aroma ()
Wine Analogy
Like cryo-maceration in winemaking but for texture modification
Coffee Analogy
Similar to nitrogen-flash freezing of coffee aromatics