Antioxidative effect of isubgol in model and in lipid system

• Published in: Journal of food processing and preservation Vol. 18; no. 6; pp. 439 - 452
• Main Authors: Mehta, R.L. (Kansas State University, Manhattan, KS.), Zayas, J.F, Yang, S.S
• Format: Journal Article
• Language: English
• Published: Oxford, UK Blackwell Publishing Ltd 01.12.1994; Blackwell Publishing
• Subjects: ACEITE DE SOJA; ACIDE LINOLEIQUE; ACIDO LINOLEICO; ANTIOXIDANTES; ANTIOXYDANT; Biological and medical sciences; Food additives; Food industries; Fundamental and applied biological sciences. Psychology; General aspects; HUILE DE SOJA; MODELE; MODELOS; PLANTAGO; Food preservation; Lipids; Models; Oxidation; Antioxygen; Medicinal plant
• ISSN: 0145-8892; 1745-4549
• DOI: 10.1111/j.1745-4549.1994.tb00266.x

Eight separate solvent systems were used to determine which was most effective and rapid for extraction of antioxidants from seeds of isubgol (Plantago ovata); methanolic extracts showed the highest antioxidative power. Effectiveness was tested in a model system of linoleic acid and in a lipid system of soybean oil stored at 32C and 60C and heated at 180C. The methanolic extracts of isubgol tested in emulsified linoleic acid showed no marked decrease in oxidation compared to the control, as measured by coupled oxidation with beta-carotene, conjugated dienes (CD) values, and TBA-test. The extracts in soybean oil did not produce significantly lower peroxide values, lower CD, or higher 18:2/16:0 ratios than the control during storage and heating tests. Thus, isubgol is not a potential source of natural antioxidant