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Step-by-Step Tutorial
PRACTICAL WALKTHROUGH · PARAMETERS · COMMON MISTAKES
Rapid freeze‑drying of herbs using liquid nitrogen preserves volatile aromas and crisp texture in minutes.
Origin: French molecular gastronomy and Japanese kaiseki (21st century) — France and Japan
See full technique reference →Liquid nitrogen immersion vitrifies herb tissues at −196 °C, preventing ice crystal growth and preserving phenolic antioxidants. Subsequent lyophilization under 0.1–0.5 mbar and −80 °C shelf temperature sublimates ice rapidly, reducing drying time to 2–4 h while maintaining microstructure.
Primary Reaction
Vitrification (glass transition) followed by sublimation of ice (solid → vapor) under vacuum
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