Chemical characterization of the mucilage from fruits of Opuntia ficus indica

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Chemical characterization of the mucilage from fruits of Opuntia ficus indica

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Chemical characterization of the mucilage from fruits of Opuntia ficus indica

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Título: Chemical characterization of the mucilage from fruits of Opuntia ficus indica
Autor: Matsuhiro, Betty; Lillo, Luis E.; Sáenz Hernández, Carmen Luisa; Urzúa, Carlos C.; Zárate, Oriette
Resumen: Extraction of peeled fruits of Opuntia ficus indica afforded with 3.8% yield a mucilage, which contained 23.4% of galacturonic acid. Total hydrolysis of a mucilage and gas-liquid chromatographic analysis of the derived alditol acetates indicated the presence of arabinose, rhamnose, xylose and galactose in the molar ratio 1.0: 1.7:2.5:4. 1. Gel permeation chromatography on Sepharose CL-4B showed the polysaccharide to be composed of at least five fractions. Treatment with cetrimide allowed the separation of an insoluble fraction (44.3% yield), which contained 28.0% of uronic acid. This fraction contained xylose, rhamnose and galactose in the molar ratio 1.0:2.5:2.8. The fraction soluble in cetrimide (15.6% yield) contained 16.0% uronic acid, and arabinose and galactose in the molar ratio of 1:2.2. It is composed of two main subfractions as shown by gel permeation chromatography. These results indicate that the mucilage from fruits O. ficus indica is a complex mixture of polysaccharides, less than 50% corresponding to a pectin-like polysaccharide.
URI: http://www.captura.uchile.cl/handle/2250/5881
Fecha: 2006-02-03
Cita del item: CARBOHYDRATE POLYMERS Volume: 63 Issue: 2 Pages: 263-267 Published: FEB 3 2006


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