Characterization of polysaccharides extracted from spent coffee grounds by alkali pretreatment
Autor(a) principal: | |
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Data de Publicação: | 2015 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/1822/34941 |
Resumo: | 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. |
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Characterization of polysaccharides extracted from spent coffee grounds by alkali pretreatmentAntimicrobial activityAntioxidant capacityPolysaccharidesSpent coffee groundsStructural propertiesScience & TechnologySpent 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.The authors acknowledge the financial support of the Science and Technology Foundation of Portugal (grant SFRH/BD/80948/2011) and the Strategic Project PEst-OE/EQB/LA0023/2013. The authors also thank the Project "BioInd - Biotechnology and Bioengineering for improved Industrial and Agro-Food processes", REF. NORTE-07-0124-FEDER-000028 Co-funded by the Programa Operacional Regional do Norte (ON.2 - O Novo Norte), QREN, FEDER.ElsevierUniversidade do MinhoBallesteros, Lina F.Cerqueira, M. A.Teixeira, J. A.Mussatto, Solange I.2015-08-202015-08-20T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/1822/34941eng0144-86170144-861710.1016/j.carbpol.2015.03.04725965493http://www.journals.elsevier.com/carbohydrate-polymers/info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-07-21T12:26:28ZPortal AgregadorONG |
dc.title.none.fl_str_mv |
Characterization of polysaccharides extracted from spent coffee grounds by alkali pretreatment |
title |
Characterization of polysaccharides extracted from spent coffee grounds by alkali pretreatment |
spellingShingle |
Characterization of polysaccharides extracted from spent coffee grounds by alkali pretreatment Ballesteros, Lina F. Antimicrobial activity Antioxidant capacity Polysaccharides Spent coffee grounds Structural properties Science & Technology |
title_short |
Characterization of polysaccharides extracted from spent coffee grounds by alkali pretreatment |
title_full |
Characterization of polysaccharides extracted from spent coffee grounds by alkali pretreatment |
title_fullStr |
Characterization of polysaccharides extracted from spent coffee grounds by alkali pretreatment |
title_full_unstemmed |
Characterization of polysaccharides extracted from spent coffee grounds by alkali pretreatment |
title_sort |
Characterization of polysaccharides extracted from spent coffee grounds by alkali pretreatment |
author |
Ballesteros, Lina F. |
author_facet |
Ballesteros, Lina F. Cerqueira, M. A. Teixeira, J. A. Mussatto, Solange I. |
author_role |
author |
author2 |
Cerqueira, M. A. Teixeira, J. A. Mussatto, Solange I. |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
Universidade do Minho |
dc.contributor.author.fl_str_mv |
Ballesteros, Lina F. Cerqueira, M. A. Teixeira, J. A. Mussatto, Solange I. |
dc.subject.por.fl_str_mv |
Antimicrobial activity Antioxidant capacity Polysaccharides Spent coffee grounds Structural properties Science & Technology |
topic |
Antimicrobial activity Antioxidant capacity Polysaccharides Spent coffee grounds Structural properties Science & Technology |
description |
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. |
publishDate |
2015 |
dc.date.none.fl_str_mv |
2015-08-20 2015-08-20T00:00:00Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/1822/34941 |
url |
http://hdl.handle.net/1822/34941 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
0144-8617 0144-8617 10.1016/j.carbpol.2015.03.047 25965493 http://www.journals.elsevier.com/carbohydrate-polymers/ |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Elsevier |
publisher.none.fl_str_mv |
Elsevier |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
instname_str |
Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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1777303757975977984 |