Please use this identifier to cite or link to this item: http://hdl.handle.net/1822/34941

TitleCharacterization of polysaccharides extracted from spent coffee grounds by alkali pretreatment
Author(s)Ballesteros, Lina F.
Cerqueira, M. A.
Teixeira, J. A.
Mussatto, Solange I.
KeywordsAntimicrobial activity
Antioxidant capacity
Polysaccharides
Spent coffee grounds
Structural properties
Issue date20-Aug-2015
PublisherElsevier
JournalCarbohydrate Polymers
Abstract(s)Spent coffee grounds (SCG), obtained during the processing of coffee powder with hot water to make soluble coffee, are the main coffee industry residues and retain approx. seventy percent of the polysaccharides present in the roasted coffee beans. The purpose of this study was to extract polysaccharides from SCG by using an alkali pretreatment with sodium hydroxide at 25 °C, and determine the chemical composition, as well as the antioxidant and antimicrobial properties of the extracted polysaccharides. Galactose (60.27% mol) was the dominant sugar in the recovered polysaccharides, followed by arabinose (19.93% mol), glucose (15.37% mol) and mannose (4.43% mol). SCG polysaccharides were thermostable, and presented a typical carbohydrate pattern. Additionally, they showed good antioxidant activity through different methods and presented high antimicrobial percent inhibition against Phoma violacea and Cladosporium cladosporioides (41.27% and 54.60%, respectively). These findings allow identifying possible applications for these polysaccharides in the food industry.
TypeArticle
URIhttp://hdl.handle.net/1822/34941
DOI10.1016/j.carbpol.2015.03.047
ISSN0144-8617
e-ISSN0144-8617
Publisher versionhttp://www.journals.elsevier.com/carbohydrate-polymers/
Peer-Reviewedyes
AccessOpen access
Appears in Collections:CEB - Publicações em Revistas/Séries Internacionais / Publications in International Journals/Series

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