... , a thickener for soups, in jellies, ice cream .Agar is a gelatinous substance derived from seaweed. Historically and in ... the genuses Gelidium and Gracilaria, or seaweed (Sphaerococcus euchema).Agar plays a special important role in industry. The concentration of ... 1%.It is the necessary raw material of food industry, chemical industry and medical research.Agar owns useful and specific characters ...