Determination of Rheological and Chemical Properties of Hemp, Rosehip Seed and Safflower Flours

Abstract

The use of alternative flour in the production of cereal products such as bread can improve the functional and nutritional properties of bread. However, the addition of substitute flour to wheat flour may have some technological, sensory, and rheological disadvantages. To eliminate these problems, the alternative flours should be used in different proportions. The aim of this study is to evaluate the remaining proportions of hemp, safflower and rosehip seeds, which are raw materials of edible and cosmetic oil industry, after oil extraction and to determine their chemical properties (protein, fat, ash) and to investigate the effect on rheological dough properties with Mixolab when used as a substitute for wheat flour. Accordingly, safflower, hemp and rosehip seed flour were added to wheat flour in five different amounts (5, 7.5, 10, 15 and 20%), focusing on displacement. The addition of flour increased protein, fat, ash, phenolic content, and antioxidant capacity. It was found that the addition of 10% safflower and hemp seed flour and 7.5% rosehip seed flour had a positive effect on rheological properties. For all three flour additions, dough development time, stability, and percent protein softening values increased, while water holding capacity decreased. Flours added at 15% or more began to negatively affect rheological properties. This study shows that 3 different flours, which can be added up to 10%, improve the rheological properties, chemically enrich them and improve their functional properties.