Description
Seaweed-derived polysaccharides enable a range of molecular gastronomy techniques such as gelation, spherification, emulsification, and freeze-drying.
Technical
Agar‑agar, carrageenan, and alginate are high‑molecular‑weight polysaccharides that form thermally or ionically cross‑linked gels. Heating agar to 40–80 °C dissolves the polymer, and cooling below 20 °C allows the chains to recrystallize into a rigid network. Carrageenan gels at 30–35 °C through helix formation, while alginate cross‑links with Ca²⁺ ions to form a 3‑dimensional gel matrix. These transitions are governed by temperature, time, concentration, and ionic strength.
Science
Primary Reaction
Gelation of seaweed polysaccharides via thermal or ionic cross‑linking
Sensory Profile
Aroma ()
sea-saltoceanicumamiearthybrinymineraliodine-like