1Institute of Human and Social Sciences, Kanazawa University, Kanazawa, Ishikawa 920-1192, 2Faculty of Education, Kanazawa University, Kanazawa, Ishikawa 920-1192, 3World Ecology Co., Ltd., Wajima, Ishikawa 928-0036, Japan
The amounts of fucoidans and alginic acid, and the composition of the fucoidans were examined for three kinds of brown algae, Chorda asiatica, Ecklonia stolonifera, and Sargassum horneri, which are eaten as food in the Noto peninsula of Ishikawa Prefecture. The results showed low contents of uronic acid and sulfuric acid for each. An investigation of the influence of temperature on the extraction in a solution revealed a large amount of viscous exudate for C. asiatica, although those for E. stolonifera and S. horneri were small, and the effect of the extraction temperature was also small. The amount of glutamic acid in these samples was also small. As a result of examining the functional activity of these samples, a high correlation was apparent in the DPPH radical scavenging activity and total phenol content of these samples, although the correlation of the SOD activity and the ACE inhibitory activity with the total phenol content of each sample was low. These findings indicate that a component other than phenols participated in the function of these samples.