Читать книгу Polysaccharides - Группа авторов - Страница 102

Freezing–thawing method was the oldest traditional method for agar production globally until 1939. In 1939 an American company named, American Agar & Co. (San Diego, USA) began manufacturing it in chilling containers like ice blocks. After World War-II, Japan started to use same technique and built new plant. Other countries like Portugal, Spain and Morocco followed the same. The extracted seaweed, which traditionally contained 1–1.2% of agar, was concentrated by thawing and straining and making it 10–12%, which was tenfold increase. All the oligomers, organic and inorganic salts and other seaweed proteins like phycoerytrins (a protein that gives red color to Rhodophyceae family) washes away with eluted water.