Unusual Color Change of Vinylpyranoanthocyanin-Phenolic Pigments

• Tipo: Artigo em Revista Científica Internacional
• Data: 2010

Autores

Alexandre R F Carvalho (Autor) Outra; Joana Oliveira (Autor) FCUP; Victor de Freitas (Autor) FCUP; Nuno Mateus (Autor) FCUP; Andre Melo (Autor) FCUP

Revista

Título: Journal of Agricultural and Food Chemistry

Vol. 58

Páginas: 4292-4297

ISSN: 0021-8561

Editora: American Chemical Society

Indexação

ISI Web of Knowledge - 12 Citações

Scopus - 15 Citações

Classificação Científica

FOS: Ciências agrárias > Outras ciências agrárias

Outras Informações

ID Authenticus: P-003-7GR

DOI: 10.1021/jf904246g

Abstract (EN): Anthocyanins are responsible for an interesting variety of colors in flowers, red fruits, and plant-derived foodstuffs. Experimental evidence is presented supporting an unusual color change from red to blue during storage. It has been investigated as a function of temperature at constant pH (pH <2). The color properties of the vinylpyranoanthocyanin pigments, usually designated portisins, have been studied in this work using both experimental and theoretical techniques. The visible spectra obtained from the two approaches were in good agreement. This behavior was explained by a reversible physical chemical change due to electronic and vibrational properties.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 6