Effects of cellulose fiber with different fiber length on rheological properties of wheat dough and quality of baked rolls

Powdered cellulose is often used in cereal processing industry. The effects of partial replacement (0.5%, 1%, 2% and 5%) of wheat flour by cellulose fiber with different fiber length (80, 120 and 220 µm) on rheological properties of wheat dough and qualitative parameters of baked rolls were studied. Sensory evaluation of baked products was also performed. Mixing and pasting properties of dough were determined by Mixolab. Generally, cellulose-enriched dough was characterized with higher water absorption, dough stability and parameters C2 and C3. Moreover, it was found that parameters C4 and C5 increased with increasing cellulose fiber length. From the results, it was also concluded that the physical parameters of baked rolls containing cellulose were reduced. It was also observed that the incorporation of cellulose fiber with shorter fiber length concluded in lower rolls volume compared to cellulose fiber with long fiber length. Texture analyses showed that the firmness of rolls containing cellulose at the substitution level 5% was significantly higher than those of the control, whereas the springiness of wheat rolls was not significantly affected. It was also recorded that the firmness and cohesiveness of baked rolls were higher after the addition of cellulose fiber with shorter fiber length. Sensory evaluation indicated that baked rolls with cellulose addition up to 1% were comparable with control rolls. Results also showed that higher levels of cellulose significantly decreased crust, taste, color and porosity of rolls.

Effect of incorporating potato dietary fibre to wheat dough on the quality of baked rolls

The effect of incorporation of commercial potato dietary fibre at different levels (1, 3, 5 and 10 %) on wheat flour dough rheology, qualitative and sensory properties of baked rolls was evaluated. Potato dietary fibre exhibits good hydration properties (water holding, water retention and swelling capacity). Its addition into wheat dough increased water absorption, prolonged dough stability and dough development time. Also, it was found that the potato fibre incorporation to wheat rolls negatively affects both volume and specific volume, and cambering of baked rolls. Sensory evaluation showed that rolls with the addition of potato dietary fibre at levels 1 and 3 % had high overall acceptability.

Effect of lentil and bean flours on rheological and baking properties of wheat dough

The potential of legume flours (lentil and bean) in bakery applications was investigated. The study indicated that legume flours were characterised by high protein (27.30–27.35 mass %) and total dietary fibre (14.91–21.52 mass %), relatively high water holding capacity (4.71–5.42 g g−1), and good emulsifying properties (emulsifying capacity: 32.73–46.96 cm3 per 100 cm3 and emulsion stability: 60.52–90.90 cm3 per 100 cm3). Fine wheat flour was partially substituted with 10 mass %, 20 mass %, and 30 mass % levels of lentil and bean flours in order to study their farinographic characteristics and baking behaviour. The addition of legume flours increased water absorption capacity (from 58.50 mass % to 74.90 mass %) and dough development time (from 3.50 min to 5.50 min), whereas dough stability was reduced (from 6.67 min to 2.30 min). The presence of legume flours in dough negatively affected the physical parameters of baked rolls and resulted in the reduction in volume, specific volume, and cambering. Sensory evaluation showed that the most acceptable baked rolls were obtained when the wheat-legume blend flour containing 10 mass % of legume flour was applied. Higher levels of legume flours in the products adversely affected the shape, crust colour, crumb elasticity, and hardness of the final products.