Caracterización de semillas de linaza (Linum usitatissimum L.) cultivadas en Venezuela
In recent years, the consumption of flaxseed (Linum usitatissimum L.) has been promoted as a functional food for its health benefits, mainly attributable to its content of omega-3 fatty acids, lignans and dietary fiber. This study evaluated the microbiological quality, chemical composition and antio...
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Published in | Archivos latinoamericanos de nutrición Vol. 62; no. 2; pp. 192 - 200 |
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Main Authors | , |
Format | Journal Article |
Language | Portuguese Spanish |
Published |
Caracas
José Féliz Chávez Pérez
01.06.2012
Sociedad Latinoamericana de Nutrición |
Subjects | |
Online Access | Get full text |
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Summary: | In recent years, the consumption of flaxseed (Linum usitatissimum L.) has been promoted as a functional food for its health benefits, mainly attributable to its content of omega-3 fatty acids, lignans and dietary fiber. This study evaluated the microbiological quality, chemical composition and antioxidant properties of flaxseed grown in Venezuela and compared them to the values of a Canadian variety widely sold in the country. Total coliforms, molds and yeasts, S. aureus and sporulated of the genera Bacillus (aerobic) and Clostridium (anaerobic), moisture, fat, protein, total dietary fiber, soluble and insoluble, mucilage, minerals, fatty acid profile, equivalent HCN content, aw, color, polyphenols and antioxidant properties, like antiradical efficiency (AE), concentration of antioxidant needed to decrease the initial concentration by 50 % (EC50) and the time required to reach the EC50 (TEC50) were evaluated. Significant differences in seed composition were determined, where its high content of fat, protein, alfalinolenic acid and dietary fiber stand out. Differences were observed in the mucilage content, but not in soluble, insoluble and total fiber content. Equivalent HCN concentration in both seeds is in the order of 40 mg/100 g, which poses no health risks, considering their consumption patterns. Venezuelan flaxseed contains higher content of polyphenols than the Canadian does, but the antioxidant capacity of the latter is higher; both have an EA rated as average and a slow reaction time (TEC50> 30 min). En los últimos años se ha promovido el consumo de linaza (Linum usitatissimum L.) como alimento funcional por sus beneficios a la salud, atribuibles principalmente a su contenido de ácidos grasos omega-3, lignanos, y fibra dietaria. En este estudio se evaluó la calidad microbiológica, composición química y las propiedades antioxidantes de la semilla de linaza cultivada en Venezuela y se comparó con una variedad canadiense de amplia venta en el país. Se determinaron coliformes totales, mohos y levaduras, S. aureus, y esporulados de los géneros Bacillus (aerobios) y Clostridium (anaerobios), humedad, grasas, proteínas, fibra dietética total, soluble e insoluble, mucílago, minerales, perfil de ácidos grasos, contenido de HCN equivalente, aw, color, polifenoles y propiedades antioxidantes como Eficiencia Antirradical (EA), concentración de antioxidante necesario para disminuir la concentración inicial en 50 % (EC50) y el tiempo necesario para alcanzar la EC50 (TEC50). Se determinaron diferencias significativas en la composición de las semillas, resaltando su elevado contenido de grasa, proteínas, ácido alfa-linolénico y fibra dietaria. Se observaron diferencias en el contenido de mucílago, pero no en el de fibra soluble, insoluble y total. La concentración de HCN equivalente en ambas semillas es del orden de 40 mg/100 g, lo cual no representa riesgos a la salud, si se consideran sus formas de consumo. La linaza venezolana contiene mayor contenido de polifenoles que la canadiense, pero la capacidad antioxidante de esta última es mayor; ambas tienen una EA calificada como media (TEC50>30 min). |
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ISSN: | 0004-0622 2309-5806 |