Fortified blended food base: effect of co-fermentation time on composition, phytic acid content and reconstitution properties
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Date
2019-08-03
Authors
Shevade, Ashwini V.
O'Callaghan, Yvonne C.
O'Brien, Nora M.
O'Connor, Tom P.
Guinee, Timothy P.
Journal Title
Journal ISSN
Volume Title
Publisher
MDPI
Published Version
Abstract
Dehydrated blends of dairy-cereal combine the functional and nutritional properties of two major food groups. Fortified blended food base (FBFB) was prepared by blending fermented milk with parboiled wheat, co-fermenting the blend at 35 °C, shelf-drying and milling. Increasing co-fermentation time from 0 to 72 h resulted in powder with lower lactose, phytic acid and pH, and higher contents of lactic acid and galactose. Simultaneously, the pasting viscosity of the reconstituted base (16.7%, w/w, total solids) and its yield stress (σ0), consistency index (K) and viscosity on shearing decreased significantly. The changes in some characteristics (pH, phytic acid, η120) were essentially complete after 24 h co-fermentation while others (lactose, galactose and lactic acid, pasting viscosities, flowability) proceeded more gradually over 72 h. The reduction in phytic acid varied from 40 to 58% depending on the pH of the fermented milk prior to blending with the parboiled cereal. The reduction in phytic acid content of milk (fermented milk)-cereal blends with co-fermentation time is nutritionally desirable as it is conducive to an enhanced bioavailability of elements, such as Ca, Mg, Fe and Zn in milk-cereal blends, and is especially important where such blends serve as a base for fortified-blended foods supplied to food-insecure regions.
Description
Keywords
Fortified blended food base (FBFB) , Fermented milk , Parboiled wheat , Phytic acid
Citation
Shevade, A. V., O’Callaghan, Y. C., O’Brien, N. M., O’Connor, T. P. and Guinee, T. P. (2019) 'Fortified Blended Food Base: Effect of Co-Fermentation Time on Composition, Phytic Acid Content and Reconstitution Properties', Foods, 8(9), 388 (14pp.). DOI: 10.3390/foods8090388