ISSN:
1573-5117
Keywords:
alkali-soluble alginate
;
block structure
;
boiling water-soluble alginate
;
brown alga
;
Kjellmaniella crassifolia
;
M:G ratio
;
seaweed
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract Kjellmaniella crassifolia, the edible macro-brown alga in Japan contained nearly 27% of alginates of which nearly 7% was extractable from the fronds with boiling water for 6 h and the residual alginates in the frond were almost exhaustively extracted with a dilute alkali at 60 °C for 6 h. The alginates dissolved in all these extracts with both boiling water and dilute alkali were purified by fractionation with MgCl2 and alcohol. The content of MM blocks in the boiling water-soluble alginate sample increased remarkably during heating for 6 h while that of GG blocks from the same sample decreased. In contrast, MM blocks in the alkali-soluble alginate sample decreased during 6 h heating while GG blocks continued to increase. Since the amounts of MG blocks showed slight fluctation, the M:G ratio of alginates extracted with boiling water increased towards the end of extraction whereas the reverse is true for the alkali-soluble alginates.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00047855
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