Effect of Apple, Chestnut, and Acorn Flours on the Technological and Sensory Properties of Wheat Bread

This study investigates the exploitation of buckwheat sourdough for the production of wheat bread. The fermentation induced extensive hydrolysis of buck- wheat main storage proteins, but did not influence the total protein, starch and polyphenols content of buckwheat. Buckwheat sourdough was incorporated at 10 and 20 % (w/w) in wheat dough, and control doughs were produced with the addition of a chemically acidified (CA) buckwheat batter. The addition of buckwheat sourdough greatly affected the rheological properties of the dough, by inducing a strengthening of the gluten network and decrease in elasticity. The acidification of wheat dough also stimulated the baker's yeast activity during proofing, resulting in higher release of CO2 in shorter times (volume of CO2 released (ml), control dough, 1,671.5; dough with 10 % sourdough, 2,600; dough with 10 % chemically acidified dough, 2,715.5). The properties of wheat bread were enhanced by the addition of 10 % buckwheat sour- dough, which led to higher specific volume (control, 3.41 ml/g; bread with 10 % sourdough, 4.03 ml/g) and softer crumb (crumb hardness, control, 5.28 N; bread with 10 % sourdough, 3.93 N). On the other hand, the higher acidification level did not influence the bread volume, but slightly hardened the crumb (crumb hardness, bread with 20 % sourdough, 7.41 N; bread with 20 % chemically acidified dough, 6.48 N). The fermentation positively influenced the nutritional properties of buckwheat flour and wheat bread, in terms of polyphenols (control bread, 8.84 mg GAE/100 g; bread with 10 and 20 % sourdough, 17.83 and 18.20 mg GAE/100 g, respectively) and phytic acid contents. Incorporation of buckwheat sourdough also led to an extension in the shelf life of wheat bread, which became more evident for the higher addition level. Overall, the results of this study suggest that buckwheat sourdough represents a suitable tool for enhancing the overall quality and nutritional properties of wheat bread.

The objective of this research was to determine effects of five enzymes on whole wheat bread properties, particularly loaf volume, bread texture, and staling. Enzymes containing conventional α-amylase (α-amyl), cellulase (cel), glucose oxidase, maltogenic α-amylase (m amyl), and xylanase (xyl) were added at three levels. Vital wheat gluten (VWG) was added as an additional, separate treatment at 2.5% (flour weight basis). Enzymes had minimal effect on water absorption and mixing time. Each enzyme increased specific loaf volume for at least one of the usage levels tested (P <0.01). Among the enzyme treatments, the greatest loaf volume was seen for xyl at the medium and high levels. No enzyme was as effective as VWG at increasing loaf volume. Overall, enzymes did not significantly change cell structure. The greatest reduction in fresh bread hardness was obtained for the high level of xyl. VWG, m amyl, and xyl reduced the rate of bread firming over 7 days. α-Amyl, cel, and m amyl decreased starch retrogradation at day 7 as measured by differential scanning calorimetry (P <0.01). M amyl nearly eliminated the endothermic peak for recrystallized amylopectin. This study demonstrated the specific application of enzymes in whole wheat bread to increase loaf volume and decrease initial crumb hardness and bread staling. PRACTICAL APPLICATION: This study will provide guidance for practical uses of enzymes in improving whole wheat dough and bread quality.

Improvers and functional ingredients in whole wheat bread: A review of their effects on dough properties and bread quality

The study of alternative food sources or ingredients that can partially replace or enrich today’s food is a perspective direction. The possibility of using horse chestnut (Aesculus hippocastanum) and chestnut (Castanea sativa) fruits in the baking industry as an admixture to wheat flour has been determined. The addition of flours from these fruits at a level of 10% increases the number of minerals in the flour mixture and also enriches the mixture in saponins, coumarins, and tannins. However, it is necessary to remove excess saponins from horse chestnut. The amylograph has shown that flour from horse chestnut fruit has optimal parameters for baking mixed bread. Farinograph tests showed that a 10% addition of ground horse chestnut to wheat flour had the best baking properties. Mixtures with 10 and 15% chestnut addition showed the best baking characteristic.

Introduction. The aim of the present study was to investigate the effect of rosehip flour on some properties of wheat dough and bread. Materials and methods. Bread was prepared from wheat flour with the addition of rosehip flour in the amount of 5, 10 and 15% to replace the equal amount of the wheat flour. The used methods are standardized and generally accepted for evaluation of bread. Results and discussion. It was found that the addition of different amounts of rosehip flour to wheat flour affected the intensity of gas formation, as the percentage of rosehip flour added had increased, the intensity of gas formation decreased. When adding 5% rosehip flour, there was no significant deterioration of gas formation. Incorporation of rosehip flour into wheat dough resulted in a decrease in water absorption and degree of softening and the lowest results were found in the sample with 15% rosehip flour added. In terms of dough development time and consistency, there were no significant differences between the samples. Dough stability was found to be higher in the samples containing rosehip flour, with the highest value reported for the sample with 5% rosehip flour. Dough and bread color characteristics decreased with increasing the rosehip flour quantity. Darker colour of rosehip flour enriched samples could be due to the original colour of rosehip fibre, which is rather brown and slightly reddish. The substitution of wheat flour with rosehip flour resulted in a decrease in volume, specific volume, height/diameter ratio and baking loss of the wheat bread. Some of the sensory parameters of bread (crust color, aroma and taste) in the rosehip flour supplemented samples were rated higher by the panelists compared to the control sample, regardless of the amount of rosehip flour added. Conclusions. The rosehip flour could be successfully used as an additive in wheat bread formulation. In the sensory assessment bread samples with rosehip flour in terms of some properties such as crust color, aroma and taste had higher scores than the control sample.

Pseudomonas syringae Diseases of Fruit Trees: Progress Toward Understanding and Control.

The present study was undertaken to develop bread from composite flours. Composite flours were prepared by blending wheat flour with watermelon rind flour in ratios of 100:0 (AB1), 90:10 (AB2), 80:20 (AB3), 70:30 (AB4) and 60:40 (AB5), respectively. This study was carried out to ascertain the effects of watermelon rind flour at different replacement levels (0%, 10%, 20%, 30%, 40%) on the proximate and functional properties of composite wheat bread. The results of proximate properties determination on wheat/flour blend gave low bulk densities of 0.54g/cm3 to 0.60g/cm3, high water absorption capacity of 2.389 to 3.044 g/g as well as a high swelling capacity of 5.764 to 7.610 g/g and a low oil absorption capacity of 1.608 to 2.150 g/g. The results of proximate composition of composite bread revealed an increase in % protein, % carbohydrate and % ash from 15.7% to 18.8%, 47.1% to 52.0% and 0.6% to 1.2% respectively and a subsequent decrease in % fat from 18.4% to 13.8. There was a reduction in energy density for composite bread. The functional properties of composite flours such as swelling capacity, water absorption capacity, oil absorption capacity and bulk density were increased with increase in the incorporation of watermelon rind flour with wheat flour. Thus, the results indicate that by incorporating watermelon rind flour, it is possible to enhance the nutritional quality, chemical and functional properties of bread.

This study investigated the physical, chemical, and sensory attributes of breads produced from preheated high-quality cassava flour (PCF) and its composite with wheat flour (CWF). Wet gluten was added to the PCF and CWF for production of bread, while bread from wheat served as the control. Flour functionality was determined prior to bread production. The moisture contents of the flour samples were in the range of 12.80 to 14.21%, and PCF exhibited water absorption capacity (1.12mL/g) comparable to that of wheat flour (WF) (1.10mL/g). There were significant (P <0.05) differences in color characteristics, except in L* values and breads produced from WF and CWF were similar in specific volume (3.85 to 4.21mL/g) and firmness (2.04 to 2.64 N). Breads from WF and CWF exhibited similar crumb microstructure, though gas bubbles in the sample from PCF appeared less developed. Wheat bread had significantly (P <0.05) higher calorie, crude protein and crude fat, but lower crude fiber, ash, and carbohydrate compared to other bread samples. Sensory evaluation showed that bread from PCF was not significantly different from 100% wheat bread in crust color, texture, and overall acceptability but was impaired in flavor. The study revealed the feasibility of bread baking from preheated cassava flour with added gluten extract. The bread produced had some quality attributes comparable to that of wheat bread. PRACTICAL APPLICATION: Bread from wheat-cassava composite flour with added gluten was similar to wheat bread in specific volume and firmness while sample from cassava flour with added gluten compared favorably well with wheat bread in crust color, texture, and overall acceptability. Findings from the study present wheat gluten extract as a viable component to be used in nonwheat flours for bread making. This could be a basis to further add value to the gluten churned out as a by-product in the wheat starch industry.

This study addresses the effect of Fucus vesiculosus seaweed powder addition up to 8% (flour basis, f.b.) on wheat flour dough and bread properties. Rheological properties and proofing behaviour of dough and density, colour, and crumb texture of bread were determined. Compared to a typical wheat bread formulation, the addition of Fucus vesiculosus seaweed powder raised elongational dough viscosity, which was responsible for a lower porosity of dough at the end of proofing. The wheat dough consistency index (power law) increased from 6.6–22.1 10−3 Pa sn with FV addition and the flow index values were low (0.24–0.29) showing a strong shear-thinning behaviour. Fucus vesiculosus seaweed powder addition significantly increased density from 0.23 g/cm3 (≤2% f.b.) up to 0.40 g/cm3 (8% f.b.), crumb firmness from ≈18 kPa (≤4% f.b.) up to 45 kPa (8% f.b.), and green colour of bread crust. The results showed that a maximum of (4% f.b.) Fucus vesiculosus seaweed powder could be added, without impairing the density and crumb texture of enriched breads.

This study aimed to evaluate the impact of incorporating acorn flour (at levels ranging from 5% to 50%) on the baking properties of wheat flour (type 750). The assessment focused on key baking parameters, including fermentation properties, pasting behavior, and dough rheological characteristics such as farinographic and extensographic properties. A laboratory baking test was conducted to compare the technological properties of wheat and wheat-acorn breads, assessing dough and bread yields, oven and total losses, bread volume, and crumb hardness. Additionally, the nutritional value of selected bread variants was established. The results indicated that flour mixtures with acorn flour exhibited a significantly reduced capacity to retain gases produced during fermentation (by up to 92%) and increased resistance to gelatinization, as evidenced by lower gel viscosity (by up to 14%) and higher endpoint temperatures during pasting (by 2-4%). The inclusion of acorn flour in wheat dough notably affected its rheological properties, particularly by reducing dough extensibility (by up to 56%). However, farinographic parameters such as dough development time and stability time were extended (by 23-378% and 29-291%, respectively). High levels of acorn flour addition (>30%) resulted in bread with a dense, gummy, and less spongy crumb structure, accompanied by a reduction in loaf volume (by 40-52%). The maximal acceptable addition of acorn flour (30%) resulted in a two-fold increase in ash and fiber contents, along with decreases in carbohydrate and protein contents by 12% and 27%, respectively. These findings emphasize the need for careful formulation adjustments when incorporating acorn flour into wheat-based baked goods to balance technological efficiency and improved nutritional value.

Additions of barley flour alone or with combination of chestnut and acorn flour (30%; 30+5%; 30+10%) were aimed at increasing the dietary fibre content in wheat bread. In this regard, enhancement by acorn flour elevated the dietary fibre by a greater extent (up to 7.80%) compared to barley or chestnut flours. Increasing the proportion of non-traditional raw materials also influenced flour pasting properties during the amylograph test as well as the farinograph and extensigraph properties of non-fermented dough. In contrast to the wheat flour, analysis of Falling Number and Zeleny values showed a decrease in technological potential of flour composites of approximately 30%. Water absorption increased about 2 percentage points, mainly with enhancement by chestnut flour. All the non-traditional raw materials slowed dough development, whilst dough softening degree differed according to actual composition. Dough viscous and elastic properties worsened as shown by a decrease in energy absorbed, depending on the type and the addition of the non-traditional products. Changes in flour composition were reflected in amylograph viscosity maximum, which became lower with increasing amounts of chestnut and acorn flour. A significant worsening of the bread specific volume as well as of bread shape (vaulting) corresponded with a partial dilution of the gluten matrix. Compared to the wheat bread, 10% chestnut flour caused bread size to diminish to less than one half of the wheat loaf. Statistically, the principal features were water absorption, dough softening degree and extensigraph energy together with specific bread volume. In terms of wheat flour and bread quality, the influence of barley flour overcame the effects of adding chestnut or acorn flours.

&amp;lt;p&amp;gt;Additions of barley flour alone or with combination of chestnut and acorn flour (30%; 30+5%; 30+10%) were aimed at increasing the dietary fibre content in wheat bread. In this regard, enhancement by acorn flour elevated the dietary fibre by a greater extent (up to 7.80%) compared to barley or chestnut flours. Increasing the proportion of non-traditional raw materials also influenced flour pasting properties during the amylograph test as well as the farinograph and extensigraph properties of nonfermented dough. In contrast to the wheat flour, analysis of Falling Number and Zeleny values showed a decrease in technological potential of flour composites of approximately 30%. Water absorption increased about 2 percentage points, mainly with enhancement by chestnut flour. All the non-traditional raw materials slowed dough development, whilst dough softening degree differed according to actual composition. Dough viscous and elastic properties worsened as shown by a decrease of in energy absorbed, depending on the type and the addition of the non-traditional products. Changes in flour composition were reflected in amylograph viscosity maximum, which became lower with increasing amounnts of chestnt and acorn flour. A significant worsening of the bread specific volume as well as of bread shape (vaulting) corresponded with a partial dilution of the gluten matrix. Compared to the wheat bread, 10% chestnut flour caused bread size to diminish to less than one half of the wheat loaf. Statistically, the principal features were water absorption, dough softening degree and extensigraph energy together with specific bread volume. In terms of wheat flour and bread quality, the influence of barley flour overcame the effects of adding chestnut or acorn flours.&amp;lt;/p&amp;gt;

Sweet and horse chestnut fruit contain carbohydrates, fibers, proteins, lipids, vitamins, glycosides and coumarin. The lipids are rich in biologically active substances as fatty acids, phospholipids, sterols and tocopherols. The fruit has been used as food, and for medicinal purposes to treat inflammatory and vascular problems. The fruits of sweet and horse chestnut contain 20 and 81 g kg(-1) glyceride oil respectively. The content of phospholipids in the oils was 49 and 3 g kg(-1). Sterols were found to be 8 and 12 g kg(-1). In the tocopherol fraction (1920 and 627 mg kg(-1)) γ-tocopherol predominated in the sweet chestnut oil (927 g kg(-1)); γ-tocopherol (591 g kg(-1)) and α-tocopherol (402 g kg(-1)) in horse chestnut oil. Palmitic, oleic and linoleic acids predominated in the triacylglycerols. Higher quantities of palmitic and oleic acids were established in the phospholipids and sterol esters. The fruits of horse and sweet chestnut have a close lipid composition. The oils are rich in essential fatty acids, such as linoleic and linolenic, as well as biologically active substances: phospholipids, sterols and tocopherols. This fact determines the good food value of sweet chestnut fruit and the possibilities for use of horse chestnuts in pharmacy and for technical purposes.

The composition (proximate, amino acids, in vitro protein digestibility [IVPD]), antinutritional factors (ANFs), functional properties, and antioxidant activity of fermented African yam bean flour (FAYBF) were determined in this study, and the effect of substituting FAYBF on the properties (nutritional, physical, and functional) of bread was investigated. Fermentation significantly (P≤0.05) increased the levels of nutrients, IVPD, total phenolic content (TPC), and antioxidant activity in the flour, with significant (P≤0.05) reduction in ANFs. The water absorption capacity (WAC) and oil absorption capacity (OAC), and swelling capacity of the flour increased after fermentation, while bulk density decreased. Substitution of wheat flour with FAYBF increased WAC and OAC, while peak viscosity decreased. Composite breads had higher nutritional, IVPD, TPC, and antioxidant activity than 100% wheat bread. The study demonstrates that FAYBF could be explored for the preparation of wheat-based bread, with reduced gluten levels. PRACTICAL APPLICATION: Bread is a staple food and this study can assist in increasing the utilization of neglected leguminous crops as well as addressing the challenge of malnutrition, prevalent in developing countries.

Studies on glass transition and starch re-crystallization in wheat bread during staling using electrical impedance spectroscopy