Comparison of composition and antioxidant capacity of some cereals and pseudocereals |
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| Authors: | Shela Gorinstein Antonin Lojek Milan Číž Elke Pawelzik Efren Delgado‐Licon Oscar J. Medina Marlén Moreno Ines Arnao Salas Ivan Goshev |
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| Affiliation: | 1. Department of Medicinal Chemistry and Natural Products, School of Pharmacy, The Hebrew University‐Hadassah Medical School, P.O.B.12065, Jerusalem 91120, Israel;2. Institute of Biophysics, Academy of Sciences of the Czech Republic, Brno, Czech Republic;3. Institute of Agricultural Chemistry, Georg‐August‐University Goettingen, Goettingen,Germany;4. Technological Institute of Durango, Department of Chemistry and Biochemistry, Durango, Mexico;5. Department of Food Chemistry, Universidad Pedagógica y Tecnológica de Colombia, Tunja, Colombia;6. Centro de Investigacion de Bioquimica y Nutricion, Facultad de Medicina, Universidad Nacional Mayor de San Marcos, Lima, Peru;7. Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, Sofia, Bulgaria |
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| Abstract: | Polyphenols, phenolic acids, fibres and antioxidant capacity were determined in water, acetone and methanol extracts of buckwheat, rice, soybean, quinoa and 3 amaranth cultivars. Their antioxidant activities were comparatively assessed by total radical‐trapping antioxidative potential (TRAP), ferric ion‐reducing antioxidant power (FRAP), cupric‐reducing antioxidant capacity (CUPRAC) and nitric oxide (NO?) assays, which comprised of contributions from polyphenols and phenolic acids (especially from the most abundant ferulic acid). The correlation coefficients between polyphenols and antioxidant activities of cereal and pseudocereal methanol extracts with FRAP, NO?, CUPRAC and TRAP were 0.99, 0.97, 0.96 and 0.77, respectively. The weakest correlation was with dietary fibres, an average one exhibited with tannins and marked correlation was shown with the phenolics. All the applied methods have shown that pseudocereals have higher antioxidant activity than some cereals (rice and buckwheat) and can be successfully replaced by cereals in case of allergy. |
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| Keywords: | Antioxidant potentials cereals polyphenols pseudocereals |
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