Whole Oat Flour Research Articles

Nutritious Instant Powder Production by Extrusion Processing Using Whole Oat and Broken Rice Flour

The effects of feed moisture content of 23% and 27%; die temperature of 120°C, 145°C, and 170°C; whole oat flour (WOF); and broken rice flour (BRF) at different ratios of 25:75, 50:50, and 75:25 were studied on functional and technological properties of the extrudates. Results showed that EI, hardness, porosity, and WAI were negatively affected by increasing WOF content, while this trend had a positive effect on WSI. Higher temperature resulted in higher WAI and WSI, but EI and hardness did not change with the amount of thermal treatment. Increasing the feed moisture content had a significant effect on elevating BD, hardness, and WAI and decreasing EI, porosity, and WSI. The FTIR spectrum demonstrated that the chemical groups of the textured samples from WOF and BRF did not change after extrusion. Simultaneous increase of WOF and the die temperature could noticeably change the morphology and crystallinity of the products. The optimized grain‐based instant powder in terms of functional properties such as good flowability and lower cohesiveness was determined at WOF 25:75 BRF blend, 170°C, and 27% moisture content. Our results demonstrate an innovative approach for the use of WOF in combination with BRF in the production of nutritious instant powder by extrusion.

Optimization of novel multigrain pasta and evaluation of physicochemical properties: using D-optimal mixture design.

D‐optimal mixture design looked to be a priceless tool for optimizing the influences of semolina flour (SF), defatted soy flour (DSF), whole quinoa flour (WQF), whole rye flour (WRF), whole oat flour (WOF), whole barley flour (WBF), and rice flour (RF) on the quality attributes of multigrain pasta (MP). Multigrain flours were considered as the independent variables evaluated with respect to three response variables containing hardness and the amount of protein and fiber. Quadratic, linear, and linear models were chosen to explain the hardness and the amount of protein and fiber of the MPs, respectively. In optimal formulation of MP, that is, SF (57.34%,), DSF (14%), WQF (11%), WRF (7.54%), WOF (5.61%), WBF (2.51%), and RF (2%), the content of fiber and protein enhanced more than 4.12 and 1.34 times compared with SP, respectively. Therefore, according to the European Union law, it can be claimed that this pasta is a source of fiber. As the amount of protein and fiber increased, the hardness and optimal cooking time decreased, while the cooking loss increased. After cooking, MP was murkier and less yellow in color. The 2, 2‐ diphenyl‐ 1‐ picrylhydrazyl (DPPH) inhibition activity of the MP was about 2.5 times higher than the SP. Analysis of the antioxidant properties of the samples after cooking showed that the DPPH inhibition activity of the SP and MP reduced. The results indicated that the overall acceptability of MP was higher than SP. Based on our findings, these multigrain flours are probable to be applied as nutritious complements in the pasta industry to improve the functional characteristics.

Production of Balady bread from wheat, barley and oat flour and its effect on blood glucose level of hyperglycemic rats

This research was carried out to evaluated the effect of wheat flour substitution by different levels from whole barley flour (WBF), whole oat flour (WOF) and mixture (WBF+WOF) of them on chemical, rheological and organoleptic characteristics of Balady bread as well as its effect on lowering blood glucose level of hyperglycemic rats. The results showed that blending of WBF or/and WOF to wheat flour increased protein, fat, ash and crude fiber content in produced bread. Also, minerals concentration was increased gradually by increasing replacement levels of WBF and WOF in all tested samples compared with control. Rheological parameters such as water absorption, arrival time, dough development, dough stability and weakening were increased significantly (P ≤ 0.05). In contrast, elasticity, extensibility, proportion number and energy were decreased in all samples compared with control. Organoleptic properties of roundness and separation of layers for all tested bread samples were not affected significantly, while, a significant (P ≤ 0.05) difference was observed in taste, odor and crust color when WBF and WOF levels were increased over 20%. Results also revealed that the hyperglycemic rats fed on bread containing 20% WBF, WOF and (WBF+WOF) for 28 days caused a significant (P ≤ 0.05) decrease in blood glucose level compared with hyperglycemic rat's control. Thus, it can be suggested that combination of WBF or/and WOF in bread up to 20% gave good quality characteristics without adversely affecting the consumer acceptability of the bread and leads to lower blood glucose level in hyperglycemic rats.

Impact of Whole Oat Flour on Dough Properties and Quality of Fresh and Stored Part‐Baked Bread

AbstractWhole oat flour (WOF) is known for high β‐glucan and antioxidant content. The main purpose of this study was to replace white wheat flour with WOF at different levels of 0, 10, 20 and 30% in production of bread using part‐baking technology. Dough properties (using farinograph) and physical characteristics of full‐baked breads stored for 1 h and 72 h at 20C were studied. Increases in water absorption, dough development time and dough softening, while a reduction in dough stability time with addition of WOF were obsereved. The specific volume of fresh breads containing WOF reduced further after storage. The crumb hardness, chewiness, elasticity and cohesiveness reduced and crust color became lighter with addition of WOF and storage time. The effects of bread storage were more obvious for samples containing WOF. The bread containing 10% WOF received the highest sensory scores and had similar sensory characteristics to the control.Practical ApplicationsCostumer demand for breads with health benefits and superior sensory properties is increasing rapidly. This study showed the effects of substitution white wheat flour with whole oat flour (WOF) which is well‐known for its health benefits owing to considerable amount of β‐glucan and antioxidants. The results of this study are applicable in bakery industry and specifically in production of bread using part‐baked technology and can be useful for the producers of functional and healthy products. Some of the effects of flour replacement with 0, 10, 20 and 30% WOF were undesirable and had negative effects on sensory attibutes of the full‐baked breads. The adverse effects of storage (72 h at ambient temparature) were more obvious for breads containing WOF. However, inclusion of 10% WOF resulted in a bread with similar sensory properties to the control and hence it can be used succesfully for production of a healthier part‐baked bread.

Effect of White Wheat Flour Substitution with Whole Oat Flour on Physical Properties of Part‐Baked Frozen Bread

AbstractThe objective of this study was to improve the shelf life and nutrition quality of bread by combination of part‐baked frozen technology and white wheat flour replacement with 0, 10, 20 and 30% (w/w) of whole oat flour (WOF). Part‐baked breads were produced at 200C for 7 min followed by freezing at −18C for 1, 7, 14, 21 and 28 days and re‐baking at 230C for 8.5 min. Increasing the level of WOF enhanced water absorption, dough development time and dough softening while reduced dough stability time. Peak viscosity, trough and final viscosities reduced while pasting temperature increased. Baking weight loss increased with frozen storage time but reduced with addition of WOF. Frozen storage time and flour replacement enhanced bread density and firmness. Inclusion of maximum 10% WOF resulted in bread with similar sensory properties to those of control with a minimum shelf life of 28 days at −18C.Practical ApplicationsOat grains are well known for their health benefits and have been used in bread and other foods to improve their nutritional value. Oat bread has been produced already by conventional methods, while there is little information to show the possibility of production of oat bread using part‐baked frozen breads technology. This technology has a growing market as it can enhance the quality and shelf life of the bread. The results of this research indicated that replacement of maximum 10% wheat flour with whole oat flour can result in satisfactory part‐baked bread with frozen shelf life of 28 days. This study can provide further information on application of whole oat flour as an excellent source of dietary fiber (mainly β‐glucan) and bioactive compounds with health benefits in bread production industry in order to respond to the increasing demand for a wider variety of healthy breads with longer shelf life.

Physical properties of sugar cookies containing chia–oat composites

Omega-3 fatty acids of chia seeds (Salvia hispanica L.) and soluble β-glucan of oat products are known for lowering blood cholesterol and preventing coronary heart disease. Nutrim, oat bran concentrate (OBC), and whole oat flour (WOF) were composited with finely ground chia, and used in cookies at 20% replacement of wheat flour for improved nutritional and physical quality. The objective was to evaluate physical properties of chia-oat composites, dough, and cookies. These composites had improved water-holding capacities compared to the starting materials. The geometrical properties and texture properties of the cookies were not greatly influenced by a 20% flour replacement using chia-OBC or chia-WOF composites. There was a decrease in the cookie diameter, and increases in the height of cookies and dough hardness using 20% Chia- Nutrim composite. These fine-particle chia-oat composites were prepared by a feasible procedure for improved nutritional value and physical properties of foods. The cookies containing chia-oat composites can be considered a health-promoting functional food.

OCENA LEPKOŚCI POZORNEJ WODNYCH ZAWIESIN CAŁOZIARNOWEJ MĄKI OWSIANEJ O ZRÓŻNICOWANEJ ZAWARTOŚCI BŁONNIKA POKARMOWEGO

OCENA LEPKOŚCI POZORNEJ WODNYCH ZAWIESIN CAŁOZIARNOWEJ MĄKI OWSIANEJ O ZRÓŻNICOWANEJ ZAWARTOŚCI BŁONNIKA POKARMOWEGO