Antioxidant capacity of (+)-catechin visible-light photoirradiated in the presence of vitamin B2

Objectives: Catechins are important components of human diet and have received special attention due to their antioxidant capacity. The purpose of this paper was to study the antioxidant action of (+)-catechin (CTQ) in the presence of vitamin B2 (riboflavin) as light-absorbing agent. Furthermore, tw...

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Detalles Bibliográficos
Autores: Barúa, María Gloria, Escalada, Juan Pablo, Bregliani, Mabel Margarita, Pajares, Adriana Mabel, Criado, Susana Noemi
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2016
País:Argentina
Institución:Consejo Nacional de Investigaciones Científicas y Técnicas
Repositorio:CONICET Digital (CONICET)
Idioma:inglés
OAI Identifier:oai:ri.conicet.gov.ar:11336/53298
Acceso en línea:http://hdl.handle.net/11336/53298
Access Level:acceso abierto
Palabra clave:ANTIOXIDANTS
CATECHINS
PHOTODEGRADATION
REACTIVE OXYGEN SPECIES
RIBOFLAVIN
VITAMIN B2
https://purl.org/becyt/ford/1.4
https://purl.org/becyt/ford/1
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network_acronym_str AR
network_name_str Argentina
repository_id_str
spelling Antioxidant capacity of (+)-catechin visible-light photoirradiated in the presence of vitamin B2Barúa, María GloriaEscalada, Juan PabloBregliani, Mabel MargaritaPajares, Adriana MabelCriado, Susana NoemiANTIOXIDANTSCATECHINSPHOTODEGRADATIONREACTIVE OXYGEN SPECIESRIBOFLAVINVITAMIN B2https://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1Objectives: Catechins are important components of human diet and have received special attention due to their antioxidant capacity. The purpose of this paper was to study the antioxidant action of (+)-catechin (CTQ) in the presence of vitamin B2 (riboflavin) as light-absorbing agent. Furthermore, two model compounds, catechol (CTC) and resorcinol (RSC), were selected in order to elucidate the reactive target of the CTQ molecule. The influence of pH-medium was investigated. Methods: Stationary photolysis, polarographic detection of dissolved oxygen, reactive oxygen species (ROS)-scavengers, time-resolved near-IR phosphorescence detection, stationary, and time-resolved fluorescence and laser flash photolysis techniques were employed. Results: CTQ interacts with riboflavin under visible-light photoirradiation as well as with different ROS which are generated in this mechanism. Radical-scavenging activity increases with increasing of pH-medium. Discussion: pH-effect of the medium on radical-scavenging activity comes from the increased electron-donating ability of CTQ upon deprotonation. These results are very interesting due to the fact that the pH of the food products displays important variations. The O2(1Δg) -scavenging ability of CTQ, would be equal to the additive contribution of each reactive center, CTC, and RSC, present at the molecule of CTQ. However, CTQ would have a moderate ability to removal of O2(1Δg) -species at pH 7.Fil: Barúa, María Gloria. Universidad Nacional de la Patagonia Austral. Unidad Académica Río Gallegos; ArgentinaFil: Escalada, Juan Pablo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de la Patagonia Austral. Unidad Académica Río Gallegos; ArgentinaFil: Bregliani, Mabel Margarita. Universidad Nacional de la Patagonia Austral. Unidad Académica Río Gallegos; ArgentinaFil: Pajares, Adriana Mabel. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de la Patagonia Austral. Unidad Académica Río Gallegos; ArgentinaFil: Criado, Susana Noemi. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Río Cuarto. Facultad de Ciencias Exactas Fisicoquímicas y Naturales. Departamento de Química; ArgentinaManey Publishing2016-11info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/53298Barúa, María Gloria; Escalada, Juan Pablo; Bregliani, Mabel Margarita; Pajares, Adriana Mabel; Criado, Susana Noemi; Antioxidant capacity of (+)-catechin visible-light photoirradiated in the presence of vitamin B2; Maney Publishing; Redox Report; 22; 6; 11-2016; 282-2891351-0002CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1080/13510002.2016.1240287info:eu-repo/semantics/altIdentifier/url/https://www.tandfonline.com/doi/full/10.1080/13510002.2016.1240287info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2024-05-08T14:18:18Zoai:ri.conicet.gov.ar:11336/53298instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982024-05-08 14:18:18.88CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Antioxidant capacity of (+)-catechin visible-light photoirradiated in the presence of vitamin B2
title Antioxidant capacity of (+)-catechin visible-light photoirradiated in the presence of vitamin B2
spellingShingle Antioxidant capacity of (+)-catechin visible-light photoirradiated in the presence of vitamin B2
Barúa, María Gloria
ANTIOXIDANTS
CATECHINS
PHOTODEGRADATION
REACTIVE OXYGEN SPECIES
RIBOFLAVIN
VITAMIN B2
https://purl.org/becyt/ford/1.4
https://purl.org/becyt/ford/1
title_short Antioxidant capacity of (+)-catechin visible-light photoirradiated in the presence of vitamin B2
title_full Antioxidant capacity of (+)-catechin visible-light photoirradiated in the presence of vitamin B2
title_fullStr Antioxidant capacity of (+)-catechin visible-light photoirradiated in the presence of vitamin B2
title_full_unstemmed Antioxidant capacity of (+)-catechin visible-light photoirradiated in the presence of vitamin B2
title_sort Antioxidant capacity of (+)-catechin visible-light photoirradiated in the presence of vitamin B2
dc.creator.none.fl_str_mv Barúa, María Gloria
Escalada, Juan Pablo
Bregliani, Mabel Margarita
Pajares, Adriana Mabel
Criado, Susana Noemi
author Barúa, María Gloria
author_facet Barúa, María Gloria
Escalada, Juan Pablo
Bregliani, Mabel Margarita
Pajares, Adriana Mabel
Criado, Susana Noemi
author_role author
author2 Escalada, Juan Pablo
Bregliani, Mabel Margarita
Pajares, Adriana Mabel
Criado, Susana Noemi
author2_role author
author
author
author
dc.subject.none.fl_str_mv ANTIOXIDANTS
CATECHINS
PHOTODEGRADATION
REACTIVE OXYGEN SPECIES
RIBOFLAVIN
VITAMIN B2
https://purl.org/becyt/ford/1.4
https://purl.org/becyt/ford/1
topic ANTIOXIDANTS
CATECHINS
PHOTODEGRADATION
REACTIVE OXYGEN SPECIES
RIBOFLAVIN
VITAMIN B2
https://purl.org/becyt/ford/1.4
https://purl.org/becyt/ford/1
description Objectives: Catechins are important components of human diet and have received special attention due to their antioxidant capacity. The purpose of this paper was to study the antioxidant action of (+)-catechin (CTQ) in the presence of vitamin B2 (riboflavin) as light-absorbing agent. Furthermore, two model compounds, catechol (CTC) and resorcinol (RSC), were selected in order to elucidate the reactive target of the CTQ molecule. The influence of pH-medium was investigated. Methods: Stationary photolysis, polarographic detection of dissolved oxygen, reactive oxygen species (ROS)-scavengers, time-resolved near-IR phosphorescence detection, stationary, and time-resolved fluorescence and laser flash photolysis techniques were employed. Results: CTQ interacts with riboflavin under visible-light photoirradiation as well as with different ROS which are generated in this mechanism. Radical-scavenging activity increases with increasing of pH-medium. Discussion: pH-effect of the medium on radical-scavenging activity comes from the increased electron-donating ability of CTQ upon deprotonation. These results are very interesting due to the fact that the pH of the food products displays important variations. The O2(1Δg) -scavenging ability of CTQ, would be equal to the additive contribution of each reactive center, CTC, and RSC, present at the molecule of CTQ. However, CTQ would have a moderate ability to removal of O2(1Δg) -species at pH 7.
publishDate 2016
dc.date.none.fl_str_mv 2016-11
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/53298
Barúa, María Gloria; Escalada, Juan Pablo; Bregliani, Mabel Margarita; Pajares, Adriana Mabel; Criado, Susana Noemi; Antioxidant capacity of (+)-catechin visible-light photoirradiated in the presence of vitamin B2; Maney Publishing; Redox Report; 22; 6; 11-2016; 282-289
1351-0002
CONICET Digital
CONICET
url http://hdl.handle.net/11336/53298
identifier_str_mv Barúa, María Gloria; Escalada, Juan Pablo; Bregliani, Mabel Margarita; Pajares, Adriana Mabel; Criado, Susana Noemi; Antioxidant capacity of (+)-catechin visible-light photoirradiated in the presence of vitamin B2; Maney Publishing; Redox Report; 22; 6; 11-2016; 282-289
1351-0002
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1080/13510002.2016.1240287
info:eu-repo/semantics/altIdentifier/url/https://www.tandfonline.com/doi/full/10.1080/13510002.2016.1240287
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Maney Publishing
publisher.none.fl_str_mv Maney Publishing
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 15,812429

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