Description
Agar forms heat-reversible gels through hydrogen bonding of agarose helices, enabling plant-based textures.
Technical
Agarose polymers form double helices upon cooling below 40°C, creating a 3D network stabilized by hydrogen bonds and hydrophobic interactions, with gel strength dependent on molecular weight and sulfate content.
Culinary Significance
Provides vegan alternatives to gelatin with higher melting points (85°C vs 35°C) and thermo-reversible properties ideal for plated desserts.
Science
Primary Reaction
Helix formation and gel network assembly
Parameters
Temperature
85°C optimal
35°C to 95°C range
Time
15 minutes setting
2 minutes – 24 hours
Equipment
Precision scale (0.01g)Immersion blenderSilicone molds