Variation of Native Agar Gel Strength in Light Deprived Gracilaria chilensis Bird, McLachlan et Oliveira.

Autor:	Hemmingson, J. A., Furneaux, R. H.
Předmět:	GRACILARIA AGAR CELL culture DIALYSIS (Chemistry) ALKALI metal halides SEAWATER BACTERIA
Zdroj:	Botanica Marina; 2003, Vol. 46 Issue 3, p307-314, 8p
Abstrakt:	Wild-grown Gracilaria chilensis subjected to a post-harvest period of light-deprived culture prior to extraction gave native agar with greatly improved gel strength. Two quite different sets of post-harvest seawater nutrient and motion conditions gave the greatest improvements in gel strength. Gel strengths of dialysis/freezethaw purified native agars (711–912 g cm­2 for a 1.5% w/w gel) compared favourably with those of a commercial bacteriological agar (645 g cm­2 for a 1.5% w/w gel). Such a post-harvest light deprivation regime might be a practical, environmentally friendly alternative to the chemical processing (alkali treatment) currently necessary for the production of food grade agar from Gracilaria chilensis. [ABSTRACT FROM AUTHOR]
Databáze:	Complementary Index
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