Colour, pH stability and antioxidant activity of anthocyanin rutinosides isolated from tamarillo fruit (Solanum betaceum Cav.)

Hurtado, Nelson Y Morales, Alicia Y Gonzalez-Miret, María L. Y Escudero, M. Luisa Y Heredia, Francisco (2009) Colour, pH stability and antioxidant activity of anthocyanin rutinosides isolated from tamarillo fruit (Solanum betaceum Cav.). Food Chemistry, 117 (11). pp. 88-93. ISSN 0308-8146

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URL Oficial: http://www.sciencedirect.com/science/article/pii/S...

Resumen

Changes in colour and stability of anthocyanins have been evaluated over pH range 2.0–8.7. The study was made on crude extract (XAD-7 Amberlite-retained fraction) as well as on the following pure pigments isolated from tamarillo fruit (Solanum betaceum Cav.): delphinidin 3-O-(6″-O-α-rhamnopyranosyl-β-glucopyranosyl)-3′-O-β-glucopyranoside, delphinidin 3-O-(6″-O-α-rhamnopyranosyl)-β-glucopyranoside, cyanidin 3-O-(6″-O-α-rhamnopyranosyl)-β-glucopyranoside and pelargonidin 3-O-(6″-O-α-rhamnopyranosyl)-β-glucopyranoside. The relationships between the colour and the hydroxylation degree of the B ring and the pH have been studied for the first time on rutinosides. The peel extract showed much more colour stability than the jelly extract at all the pH values studied. The replacement of the 3′-OH with a glycosyl group increased the stability of the colour to pH changes, although this substitution yields a less colourful (higher L ∗ and lower View the MathML source) compound (Dp 3-rut-3′-glc), having both hypsochromic and hypochromic shifts relative to the non-glycosylated molecule (Dp 3-rut). Moreover, the influence of the hydroxylation degree of the B ring on the quality and stability of colour, as well as on the antioxidant activity, was determined.

Tipo de Elemento: Artículo
Palabras Clave: Anthocyanins; Solanum betaceum; Tamarillo fruit; Tree tomato; Colour; Stability; Antioxidant
Asunto: Q Ciencias > QD Chemistry
Division: Facultad de Ciencias Exactas y Naturales > Programa de Química > Productividad
Depósito de Usuario: PhD NELSON HUMBERTO HURTADO GUTIERREZ
Fecha Deposito: 30 Jan 2017 23:25
Ultima Modificación: 30 Jan 2017 23:25
URI: http://sired.udenar.edu.co/id/eprint/3608

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