| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve the problems that the complexity of conditions for separating and purifying fucoidan allows the production of only a limited amount of fucoidan, that production equipment needs to be made of an anticorrosive material which is expensive and difficultly workable, that when a strong acid is used as an extracting solvent, the produced fucoidan needs to be finally neutralized with a strong base, which causes an increase in the number of production steps and an increase in an impurity content, and that the efficiency of extraction of fucose from fucoidan is extremely low, and a like problem. <P>SOLUTION: The method for extracting fucoidan comprises lyophilizing wakame sprouts washed with seawater or saline water, extracting the lyophilized sprouts with hot water or an acid for an extraction time in the range of 0.5 to 72 h, and adjusting hot water used to extract the ground sprout to a pH in the range of 2 to 3 to extract colorless, odorless high-purity fucoidan. Alternatively, the method is one in which a fucoidan-like polysaccharide composite obtained by extracting a sprout powder prepared by freeze-drying wakame sprouts washed with running water and grounding the freeze-dried sprouts contains fucose and which comprises the step of lyophilizing washed sprouts and the step of grinding the lyophilized sprouts. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
