Date fruit melanin is primarily based on (−)-epicatechin proanthocyanidin oligomers

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Autor(es): dc.contributorUnited Arab Emirates University-
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.contributorNew York University Abu Dhabi-
Autor(es): dc.contributorQassim University-
Autor(es): dc.contributorMarlowe Innovation Centre-
Autor(es): dc.creatorAlam, Muneeba Zubair-
Autor(es): dc.creatorOkonkwo, Clinton Emeka-
Autor(es): dc.creatorCachaneski-Lope, João P.-
Autor(es): dc.creatorGraeff, Carlos F. O.-
Autor(es): dc.creatorBatagin-Neto, Augusto-
Autor(es): dc.creatorTariq, Saeed-
Autor(es): dc.creatorVarghese, Sabu-
Autor(es): dc.creatorO’Connor, Matthew J.-
Autor(es): dc.creatorAlbadri, Abuzar E.-
Autor(es): dc.creatorWebber, J. Beau W.-
Autor(es): dc.creatorTarique, Mohammed-
Autor(es): dc.creatorAyyash, Mutamed-
Autor(es): dc.creatorKamal-Eldin, Afaf-
Data de aceite: dc.date.accessioned2025-08-21T18:40:12Z-
Data de disponibilização: dc.date.available2025-08-21T18:40:12Z-
Data de envio: dc.date.issued2025-04-29-
Data de envio: dc.date.issued2024-11-30-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1038/s41598-024-55467-x-
Fonte completa do material: dc.identifierhttps://hdl.handle.net/11449/301464-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/301464-
Descrição: dc.descriptionPlant-based melanin seems to be abundant, but it did not receive scientific attention despite its importance in plant biology and medicinal applications, e.g. photoprotection, radical scavenging, antimicrobial properties, etc. Date fruit melanin (DM) has complex, graphene-like, polymeric structure that needs characterization to understand its molecular properties and potential applications. This study provides the first investigation of the possible molecular composition of DM. High performance size-exclusion chromatography (HPSEC) suggested that DM contains oligomeric structures (569–3236 Da) and transmission electron microscopy (TEM) showed agglomeration of these structures in granules of low total porosity (10–1000 Å). Nuclear magnetic resonance (NMR) spectroscopy provided evidence for the presence of oligomeric proanthocyanidins and electron paramagnetic resonance (EPR) spectroscopy revealed a g-factor in the range 2.0034–2.005. Density functional theory (DFT) calculations suggested that the EPR signals can be associated with oligomeric proanthocyanidin structures having 4 and above molecular units of (−)-epicatechin. The discovery of edible melanin in date fruits and its characterization are expected to open a new area of research on its significance to nutritional and sensory characteristics of plant-based foods.-
Descrição: dc.descriptionCollege of Graduate Studies, United Arab Emirates University-
Descrição: dc.descriptionCollege of Humanities and Social Sciences, United Arab Emirates University-
Descrição: dc.descriptionCollege of Medicine and Health Sciences, United Arab Emirates University-
Descrição: dc.descriptionNational Water Center, United Arab Emirates University-
Descrição: dc.descriptionUnited Arab Emirates University-
Descrição: dc.descriptionZayed Bin Sultan Center for Health Sciences, United Arab Emirates University-
Descrição: dc.descriptionDepartment of Food Science College of Agriculture and Veterinary Medicine United Arab Emirates University-
Descrição: dc.descriptionPostgraduate Program in Materials Science and Technology (POSMAT) São Paulo State University (UNESP), SP-
Descrição: dc.descriptionDepartment of Physics School of Sciences São Paulo State University (UNESP), SP-
Descrição: dc.descriptionInstitute of Sciences and Engineering São Paulo State University (UNESP), SP-
Descrição: dc.descriptionDepartment of Anatomy College of Medicine and Health Sciences United Arab Emirates University-
Descrição: dc.descriptionCore Technology Platforms New York University Abu Dhabi-
Descrição: dc.descriptionDepartment of Chemistry College of Science Qassim University-
Descrição: dc.descriptionLab-Tools Ltd. Marlowe Innovation Centre, Marlowe Way-
Descrição: dc.descriptionNational Water and Energy Center (NWEC) United Arab Emirates University-
Descrição: dc.descriptionPostgraduate Program in Materials Science and Technology (POSMAT) São Paulo State University (UNESP), SP-
Descrição: dc.descriptionDepartment of Physics School of Sciences São Paulo State University (UNESP), SP-
Descrição: dc.descriptionInstitute of Sciences and Engineering São Paulo State University (UNESP), SP-
Descrição: dc.descriptionCollege of Graduate Studies, United Arab Emirates University: 12R158-
Descrição: dc.descriptionCollege of Humanities and Social Sciences, United Arab Emirates University: 12R158-
Descrição: dc.descriptionCollege of Medicine and Health Sciences, United Arab Emirates University: 12R158-
Descrição: dc.descriptionNational Water Center, United Arab Emirates University: 12R158-
Descrição: dc.descriptionUnited Arab Emirates University: 12R158-
Descrição: dc.descriptionZayed Bin Sultan Center for Health Sciences, United Arab Emirates University: 12R158-
Idioma: dc.languageen-
Relação: dc.relationScientific Reports-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subject(−)-Epicatechin-
Palavras-chave: dc.subjectDate fruit-
Palavras-chave: dc.subjectMelanin-
Palavras-chave: dc.subjectPhoenix dactyliferaL-
Palavras-chave: dc.subjectProanthocyanidins-
Título: dc.titleDate fruit melanin is primarily based on (−)-epicatechin proanthocyanidin oligomers-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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