Abstract

MEDINA, Carlos et al. Evaluation of two starch extraction methods from cotyledons of mango. Bioagro [online]. 2010, vol.22, n.1, pp.67-74. ISSN 1316-3361.

The mango (Mangifera indica L.) fruit is widespread in Venezuela and it may be considered an unconventional alternative source for starch production. The objective of this research was to evaluate two starch extraction methods from cotyledons of mango (Mangifera indica L. type Hilacha). Cotyledons were ground to flour, and submitted to immersion in either (I) distillated water, or (II) aqueous solution of NaOH 0.25 N, for starch extraction. Chemical composition (moisture, starch, total sugars, fat, ash, tannins, crude fiber, amylose, and amylopectin), functional properties (water absorption index, and solubility indexI), color (Hunter) and viscoamylographic profile of the products were determined. Significant difference (P≤0.05) in the chemical composition were found, except for total sugars, amylose and amylopectin content (P>0.05). The major yield in starch obtained was found in the water treatment, although the product showed lower purity. The viscoamylographic profile showed that gelatinization temperature was 78.5 ºC in both products. The low resistance according to the amylose values suggests that the obtained starch had low gelatinization power.

Keywords : Gelatinization; viscoamylographic profile; polysaccharides.