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Provedor de dados:  ArchiMer
País:  France
Título:  Decrease in dynamic viscosity and average molecular weight of alginate from Laminaria digitata during alkaline extraction
Autores:  Vauchel, Peggy
Arhaliass, Abdellah
Legrand, Jack
Kaas, Raymond
Baron, Regis
Data:  2008-04
Ano:  2008
Palavras-chave:  Laminaria digitata
Intrinsic viscosity
Average molecular weight
Alkaline extraction
Resumo:  Alginates are natural polysaccharides that are extracted from brown seaweeds and widely used for their rheological properties. The central step in the extraction protocol used in the alginate industry is the alkaline extraction, which requires several hours. In this study, a significant decrease in alginate dynamic viscosity was observed after 2 h of alkaline treatment. Intrinsic viscosity and average molecular weight of alginates from alkaline extractions 1-4 h in duration were determined, indicating depolymerization of alginates: average molecular weight decreased significantly during the extraction, falling by a factor of 5 between 1 and 4 h of extraction. These results suggested that reducing extraction time could enable preserving the rheological properties of the extracted alginates.
Tipo:  Text
Idioma:  Inglês

Editor:  Blackwell science
Formato:  application/pdf
Fonte:  Journal of Phycology (0022-3646) (Blackwell science), 2008-04 , Vol. 44 , N. 2 , P. 515-517
Direitos:  2008 Blackwell Publishing, Inc. Phycological Society of America.

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