title: Effect of domestic processing on the polyphenol content and bioaccessibility in finger millet (Eleusine coracana) and pearl millet (Pennisetum glaucum).
abstract: Finger millet (Eleusine coracana) and pearl millet (Pennisetum glaucum) were evaluated for polyphenolic content and their bioaccessibility. Total polyphenols of native finger millet was 10.2mg/g which reduced by 50% after sprouting or pressure-cooking, while 12-19% reduction was seen after open-pan boiling. Total flavonoids of the grain reduced drastically on sprouting, pressure-cooking or open-pan boiling. Concentration of phenolic acids generally increased during sprouting and roasting of finger millet. Pressure cooking, open-pan boiling and microwave-heating reduced the bioaccessible polyphenols by 30-35%, while the same was increased by 67% by sprouting. Significant reduction of total polyphenols was observed in pressure-cooked, open-pan boiled and microwave-heated pearl millet. Concentration of sinapic and salicylic acids were highest phenolic acids of pearl millet. Total polyphenols reduced during sprouting and pressure-cooking. There was a 20% increase in the bioaccessible polyphenols after sprouting of pearl millet. Thus, sprouting and roasting provided more bioaccessible phenolics from these two common millets studied.
authors.affiliation: Department of Biochemistry and Nutrition, CSIR - Central Food Technological Research Institute, Mysore 570 020, India.
authors.forename: Gavirangappa
authors.initials: G
authors.lastname: Hithamani
authors.affiliation: Department of Biochemistry and Nutrition, CSIR - Central Food Technological Research Institute, Mysore 570 020, India. Electronic address: ksri.cftri@gmail.com.
authors.forename: Krishnapura
authors.initials: K
authors.lastname: Srinivasan
mesh_terms: D001682:Biological Availability; D002851:Chromatography, High Pressure Liquid; D003296:Cooking; D002523:Edible Grain / Q000737:chemistry; D031748:Eleusine / Q000737:chemistry*; D005419:Flavonoids / Q000032:analysis; D031782:Pennisetum / Q000737:chemistry*; D059808:Polyphenols / Q000032:analysis*; D013634:Tannins / Q000032:analysis
chemical_list: D005419:Flavonoids; D059808:Polyphenols; D013634:Tannins
keywords: Bioaccessibility; Domestic processing; Finger millet; Pearl millet; Polyphenols