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The yield, physical and chemical properties of agar gel from Gracilaria species (Gracilariales, Rhodophyta) of the Kenya coast
Oyieke, H. A. (1993). The yield, physical and chemical properties of agar gel from Gracilaria species (Gracilariales, Rhodophyta) of the Kenya coast. Hydrobiologia 260/261: 613-620. http://dx.doi.org/10.1007/BF00049079
In: Hydrobiologia. Springer: The Hague. ISSN 0018-8158; e-ISSN 1573-5117, meer
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Author keywords
    species, agar, quality, quantity

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  • Oyieke, H. A.

Abstract
    Six species of Gracilaria, G. corticata J. Agardh, G. crassa Harvey, G. millardetii J. Agardh, G. salicornia (J. Ag.) Dawson, G. verrucosa (Huds.) Papenfuss and Gracilaria sp, collected from different stations along the Kenya coast were studied. The yield of hot water native agar extract ranges from 8.1–30% of dry weight, with G. verrucosa and G. salicornia having the greatest and the least yield, respectively. The gel-strength of 1.5% agar solution was highest in G. verrucosa (220 g cm-2) and lowest in G. corticata (< 60 g cm - 2) whereas the highest gelling temperature was recorded for Gracilaria sp. (40.4 °C) and the lowest in G. verrucosa (28.9 °C). 3,6 anhydrogalactose content was the highest in G. verrucosa and the lowest in G. corticata while sulphate content was higher in the latter.

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