On the alkali-treatment of Onikusa (Gelidium japonicum) and Makusa (Gelidium amansii)

Abstract

The alkali-treatment of Onikusa (Gelidium japonicum) and Makusa (Gelidium amansii) and preparation of agar from these seaweeds were carried out under various conditions.
Yield and total SO₃ of agar and jelly strength and melting point of agar gel were measured. Furthermore, the agar components, agarose and agaropectin were separated by treatment with sodium iodide.