Abstract
The focus of this study was to examine the brewing performance quality attributes of wort and beer produced entirely from such combinations at various quantities. The physiochemical characteristics of the different gluten-free beer with and without the addition of ginger in comparison to barley-based beers was also examined. In this study, three different types of gluten-free cereals (oat, rice and corn) were used in the production of pale beer. Freshly grated ginger was added to some of the produced beer samples prior to maturation. This was compared to the beer samples produced using barley malt and also with an addition of ginger. For this, the total phenolic content, flavonoid content, color intensity, bitter acid content, and selected mineral content have been evaluated. The final product presented the bitter acid content of oat + rice beer with the highest amount among all the individual beer samples analyzed; In the Flavonoid content, the control sample beer was higher than all the other individual beer samples and the TPC showed a similar pattern. Concerning the mineral level present, potassium and phosphorus was seen to possess the highest concentration respectively in the beer samples. In addition, the oat beer has the highest amount in sodium, calcium and sulphur respectively while magnesium was highest in control + ginger beer. The chemometric approach shows that the gluten free beer produced with and without ginger displayed several traits from the control samples. The cereal blends show some promising attributes as an adjunct for beer brewing.
Highlights
Beer is a fermented and commonly consumed alcoholic beverage existing for a long period of time globally
This was evident in the low concentration from samples 3 (30 mg GAE/100ml) to 8 (20.7 mg GAE/100ml) which were mixed with corn and rice flakes when compared with the control sample beer
The addition of ginger had different effects on different beer samples, but these effects were not significant compared to the effect of the raw materials
Summary
Beer is a fermented and commonly consumed alcoholic beverage existing for a long period of time globally. Phenolic compounds in beer originate from either cereal or hops and play critical roles in the color, flavor stability, colloidal stability and other properties of beer They are generally considered as one of very important antioxidant sources in beer (Vanderhaegen et al, 2006). Oat (Avena sativa L.) has been an alternative gluten-free raw material in the food industry since it contains nearly no gluten making it suitable for gluten free food production (Arendt and Zannini, 2013) It has been of interest for individuals suffering from celiac disease. Rice (Oryza sativa L.) has been existing for a long time as a common source of gluten free grain It is considered as a non-expensive source of nutrient having more than three-quarter its percentage to be starch and its proteins are friendly to coeliac disease patients.
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