Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 418037
Title Extraction of antioxidant pigments from dye sorghum leaf sheaths
Author(s) Kayode, A.P.P.; Bara, C.A.; Dalode-Vieira, G.; Linnemann, A.R.; Nout, M.J.R.
Source Food Science and Technology = Lebensmittel-Wissenschaft und Technologie 46 (2012)1. - ISSN 0023-6438 - p. 49 - 55.
Department(s) Product Design and Quality Management Group
Food Microbiology
Publication type Refereed Article in a scientific journal
Publication year 2012
Keyword(s) phenolic-compounds - anthocyanins - 3-deoxyanthocyanidins - vegetables - varieties - capacity - assay - acid - food - red
Abstract Extraction of antioxidant biocolorant pigments from leaf sheaths of dye sorghum was optimized. Effects of temperature and ethanol concentration of the extraction solvent on the concentrations of the 3-deoxyanthocyanidins, total phenolics and total anthocyanins, and the colour parameters of the biocolorant extract were evaluated using the response surface methodology. Extraction parameters affected the extraction rate of the biocolorant pigments and the colour characteristics of the extract. Maximum pigment yields were obtained at 50 °C and an ethanol concentration of the solvent of 51 mL 100 mL-1. Addition of HCl (1 mL 100 mL-1) to the solvent significantly improved the extractability of the biocolorant pigments. The crude extract from the leaf sheaths showed high antioxidant capacity with a total antioxidant capacity of 1026 mg of Trolox equivalent (TE) g-1 of DM. --------------------------------------------------------------------------------
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