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Influence of lupin (Lupinus albus L.) yoghurt on mineral content and functional properties of tarhana
(Wageningen Academic Publishers, 2014) Ertas, N.; Bilgicli, N.; Ozcan, S.; Sari, S.
Tarhana is a fermented cereal-yoghurt-vegetable based product that contains high amounts of protein, mineral and vitamin. In this research, lupin yoghurt (LY) was produced from fermented lupin milk, and replaced with cow's milk yoghurt up to 100% (w/w) level in tarhana formulation. LY substitution increased protein content of final product from 13.12% up to 14.87%. The redness (a*), yellowness (b*) and hue values of tarhana samples changed significantly (P<0.05) with LY usage. Tarhana samples prepared with 100% LY had the lowest a* and b*, and the highest hue values. Tarhana containing high amounts of LY had rich copper, iron, manganese and zinc contents compared to control tarhana. Especially manganese content of the tarhana increased up to 177 times with LY substitution. While LY over 25% level improved the functional properties such as foaming capacity, water absorption capacity and emulsifying activity of tarhana samples, foaming stability was negatively affected by LY substitution. Colour, taste, consistency, sourness and overall acceptability scores decreased at high substitution levels of LY.