Encapsulación de ácido fólico en matrices poliméricas diferentes
Date
2015-10-01
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Abstract
La harina de arroz, empleada asiduamente por la población celíaca, no es actualmente en nues-
tro país enriquecida con nutrientes como el hierro, el cinc y las vitaminas. Sin embargo, este
método se ha implantado en muchos países por iniciativa de la Organización Mundial de la Salud
(OMS).
Un proceso adecuado de microencapsulado permite proteger cada uno de estos nutrientes
de la oxidación, humedad y la exposición a la luz, y/o para enmascarar sus aromas o sabores
desagradables. Un estudio completo puede incluir también la evaluación del material de encap-
sulamiento que mejore la biodisponibilidad de estos micronutrientes en el organismo humano.
En este trabajo se muestra la caracterización de la harina de arroz usada como base y los re-
sultados obtenidos a partir del encapsulamiento de ácido fólico por dos métodos: secado por
atomización o spray y gelificación iónica y empleando dos polímeros de recubrimiento en cada
caso: goma arábiga y alginato de calcio, respectivamente.
The rice flour, often employed by celiac population, is not in our country yet fortified by nutrients (like iron, zinc or vitamins) addition. However, this method is applied in many other countries as an initiative taken by World Health Organization (WHO). A proper microencapsulation process allows protecting each one of the said nutrients from oxidation, moisture and light exposure damages and/or masking their unpleasant aromas and flavors. Also it involves the ability of an encapsulation medium to improve the bioavailability of micronutrients in human organisms. In this article chemical and physical characteristics of the rice flour base are shown. Also, the results of two folic acid encapsulation methods: spray or atomizer drying and ionic gelation are presented. Two different polymeric coatings were tested, gum Arabic and calcium alginate, respectively.
The rice flour, often employed by celiac population, is not in our country yet fortified by nutrients (like iron, zinc or vitamins) addition. However, this method is applied in many other countries as an initiative taken by World Health Organization (WHO). A proper microencapsulation process allows protecting each one of the said nutrients from oxidation, moisture and light exposure damages and/or masking their unpleasant aromas and flavors. Also it involves the ability of an encapsulation medium to improve the bioavailability of micronutrients in human organisms. In this article chemical and physical characteristics of the rice flour base are shown. Also, the results of two folic acid encapsulation methods: spray or atomizer drying and ionic gelation are presented. Two different polymeric coatings were tested, gum Arabic and calcium alginate, respectively.
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Keywords
microencapsulación, secado por atomización, gelificación iónica, microencapsulation, spray drying, ionic gelation
Citation
Proyecciones, Vol.13 No. 2
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