Gelation: Hydrocolloid Families and Applications
I
Origin
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II
Description
Gelation is the transformation of a liquid into a gel through the formation of a three-dimensional network of polymer chains. Every gel in the kitchen — aspic, panna cotta, jelly, agar-set dashi — is a different polymer type creating a different network structure at a different temperature, producing a different mouthfeel and a different melting behaviour. Understanding the distinct properties of each gelling agent transforms texture from a happy accident into a precision decision.
III
The Thread
—Agar has been used in East Asian desserts (yokan in Japan, grass jelly in Southeast Asia) for centuries
—Carrageenan's predecessor (Irish moss) was used in traditional Irish desserts (blancmange)
—The convergence of different algae-derived gelling agents across cultures reflects the universal availability of marine algae and the universal culinary discovery that dried algae can set liquids
IV
Flavour Context
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Pillars V — VII
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