Characteristics Of Gluten-free Breads Research Articles

Impact of Corn Fiber on the Physicochemical/Technological Properties, Emotions, Purchase Intent and Sensory Characteristics of Gluten Free Bread with Novel Flours

Gluten-free products present huge advantages for individuals with gluten intolerance or celiac disease. The most influential strategy to develop a product comparable to wheat-containing gluten products is to promote its nutritional and sensorial attributes. Recently, rice flour and teosinte flour were used to develop gluten-free bread. As a result, this work aimed to compare the physical/technological attributes of bread made with rice flour and teosinte flour with corn fiber fortification and examine consumer acceptance and purchase intent. An extreme vertices mixture design decided that a teosinte flour (43.4%), high protein white rice flour (55%), and high protein brown rice flour (1.6%) ratio of gluten-free flour mixture for bread was best based on the sensory attributes utilized for the desirability function methodology. After optimizing the gluten-free flour mixture, the bread was fortified with corn fiber under 1.7 g and 3.8 g per serving, and it was evaluated to examine its physical/technological attributes, consumer perception, liking, emotions, and purchase intent. Incorporating fiber into gluten-free bread impacted the color and texture, giving lighter and yellower colors with a firmer texture. Likewise, concerning health benefit claims, gluten-free bread with fiber claims only improves the purchase intent and overall liking of bread containing 1.7 g per serving of fiber. The flavor attribute was the main driver for consumers’ purchase decisions. This product could be beneficial for consumers who are seeking fiber in their diet.

Effect of inulin polymerization degree on nutritional and technological characteristics of gluten free bread

Introduction: Wheat bread is the staple food all over the world. Gluten sensitivity in some people has led to the development of gluten-free ones. Inulin is a soluble dietary fiber with beneficial nutritional effects is able to restore the function of gluten in gluten-free products by increasing water absorption and creating a structure. The function of gluten depends on its polymerization degree. This study is aimed to investigate the effect of inulin polymerization degree on the technological and nutritional characteristics of rice-acorn flour based gluten-free bread.
 Methods: This study is an experimental type. To investigate the effect of the inulin polymerization degree on technological and nutritional characteristics of rice:acorn flour based gluten-free bread, the textural, physicochemical, sensory characteristics and inulin stability of samples enriched inulin with different polymerization degree were assessed. All tests were done in triplicate. Data analysis was done with SPSS 25 software
 Results: Results indicated that the optimized technological characteristics and lowest inulin loss ratio (31% w/w-1) is found at gluten-free bread samples containing 30% w/w-1 of acorn flour and long-chain inulin fermented by MF-SD (A30R70SL). Long-chain inulin is found to be able to restore gases produced during the fermentation and expanded through cooking process, which seems to be induced by its potential ability to form a gel.
 Conclusion: Using long-chain inulin is recommended to achieve desirable technological characteristics and high nutritional value in the formulation of gluten-free bread.

Effects of separated and combined amaranth, quinoa and chia flours on the characteristics of gluten-free bread with different concentrations of hydrocolloids

Rice and corn flour/starch are frequently used in the manufacture of gluten-free products, which are usually characterized by high starch content, low fiber content, poor texture, insufficient volume, short shelf life, fast staling, and easy crumbling. The objective of this study was to use amaranth, quinoa, and chia flours, separately or in combination, and corn starch in different ratios as an alternative to wheat/rice flours. Furthermore, several hydrocolloids (methylcellulose, carboxymethylcellulose, xanthan gum, and guar gum) were added at different levels (2, 3, and 4%) to the precited flours in order to improve the technological properties of gluten-free bread, enhance its nutritive value, and avoid the negative effects caused by the ingestion of gluten for coeliacs. The increase in pseudocereal flours’ ratios produced dark dough and resulted in a decrease in specific volume and an increase in moisture content and crumb texture hardness in all bread formulations (except in quinoa breads). The increase in hydrocolloids’ levels contributed to an increase in the moisture content, specific volume, L values of crumb color, and hardness of all breads. The formulations prepared with the lowest ratio of pseudocereal flours (10%) at the highest hydrocolloid concentration (4%) produced better quality bread than the control in terms of acceptability. Among the pseudocereal-containing breads, quinoa breads had the best specific volume and crumb hardness, followed by chia, mixture, and amaranth breads. The formulations containing natural hydrocolloids combined with amaranth, quinoa, and chia flours could be interesting to produce “better-quality and healthier” bread for coeliacs.

Impact of Raw, Roasted and Dehulled Chickpea Flours on Technological and Nutritional Characteristics of Gluten-Free Bread

The main objective of this study was to develop a healthy rice-based gluten-free bread by using raw, roasted, or dehulled chickpea flours. All breads containing chickpea flours showed a darker crust and were characterized by an alveolar (porosity 41.5–51.4%) and soft crumb (hardness 5.5-14.1 N). Roasted chickpea flour bread exhibited the highest specific volume, the softest crumb, and the slowest staling rate. Enriching rice-based breads with the chickpea flours resulted in increased protein (from 9.72 to 12.03–13.21 g/100 g dm), ash (from 2.01 to 2.45–2.78 g/100 g dm), fat (from 1.61 to 4.58–5.86 g/100 g), and total phenolic contents (from 49.36 up to 80.52 mg GAE/100 g dm), and in reduced (~10–14% and 13.7–17%, respectively) available starch levels and rapidly digestible starch compared to rice bread. Breads with roasted chickpea flour also showed the highest in vitro protein digestibility. The results of this study indicated that the enrichment of rice-based gluten-free breads with chickpea flours improved the technological and nutritional quality of the breads differently according to the processed chickpea flour used, also allowing recovery of a waste product.

A Review of Non-gluten Components in Gluten-Free Bread Characteristics keep the dough’s baking quality and viscoelastic qualities

Gluten, the protein responsible for dough’s cohesive and elastic properties, is found in wheat. Gluten-free bread has recently gained popularity as a result of its acceptability for celiac disease sufferers. During proofing and baking, however, the batters do not retain carbon dioxide gas. In comparison to typical wheat breads, this results in a bread with a smaller loaf and specific volume, low moisture, thick structure, crumply texture, and high crumb hardness. One of the most important variables in maintaining and searching for replacement components to replace gluten qualities for attractive product quality and structure is product idea expertise. In this context, non-gluten ingredients such as starch, sourdough, gums/ hydrocolloids, hydroxypropyl methylcellulose, whey protein, and dietary fiber help to improve gluten-free bread quality. Furthermore, adding Gum to gluten-free flour enhances dough features by boosting water absorption capacity and making the dough viscoelastic, resulting in enhanced loaf and specific volume, soft texture, and a longer shelf life by delaying bread staling. Food gums could be widely used in the baking industry to improve water holding capacity, control food pasting properties and improve moisture content, modify product texture, volume, and cell structure, and maintain overall product quality during storage and shelf life by keeping moisture content constant and delaying staling. The goal of this study was to accesses the rheological characteristics and quality of non-gluten components for dough quality enhancement.

Characteristics of gluten-free potato dough and bread with different potato starch-protein ratios

Abstract The poor retention of fermentation gases and air is a critical issue for gluten-free (GF) products. To better understand the effect of potato flour on the characteristics of GF bread, the mechanistic relations between potato starch and potato protein in different ratios at 9:1, 8:2, 7:3, 6:4 and 5:5 for GF dough were investigated for viscoelasticity, thermal properties, moisture, microstructures, and bread quality. The results reveal that potato starch had a relatively important role in both dough and bread. The viscous character of dough was highest at a proportion of 6:4, with a more compact microstructure and better bread color, volume, hardness, chewiness, resilience and springiness. With decreasing starch content, the gelatinization and retrogradation enthalpy decreased, and the relaxation time of immobilized water and free water increased significantly. These results are believed to be helpful for processors to develop and optimize GF breads with potato starch and potato protein.

Influence of binary mixtures of cassava starch and rice flour on the chemical and sensory characteristics of gluten-free bread

In this study, response surface methodology based on simplex- centroid design was used to optimize the gluten-free bread formulation with rice flour and cassava starch as independent variables. Bread formulations were evaluated by physicochemical analysis and descriptive sensory analysis encompassing appearance, structure, texture, and aroma parameters by a trained sensory panel. The five formulations composition showed statistical differences concerning aw, lipid and protein content. Carbohydrate was significantly correlated with specific volume and lipids with protein. Overall, rice flour's addition improved lipid and protein, whereas further rises in cassava starch allowed developing bread with higher specific volume and sensory scores. The optimum combinations of the variables to maximize scores of porosity, texture, elasticity, and protein content, should be obtained with 51.75% of rice flour and 48.25% of cassava starch. The use of the simplex-centroid design and the response desirability function in the optimization was useful for evaluating the influence and potential of the binary mixture of rice flour and cassava starch on the sensory quality and chemical characteristics of gluten-free bread. These research findings open the scope for further investigation of rice flour and cassava starch and their useful application in gluten-free bread processing.

A Review of Non-gluten Components in Gluten-free Bread Characteristics, Dough Baking Quality and Viscoelastic Qualities

Gluten, the protein responsible for dough's cohesive and elastic properties, is found in wheat. Gluten-free bread has recently gained popularity as a result of its acceptability for celiac disease sufferers. During proofing and baking, however, the batters do not retain carbon dioxide gas. In comparison to typical wheat breads, this results in a bread with a smaller loaf and specific volume, low moisture, thick structure, crumply texture, and high crumb hardness. One of the most important variables in maintaining and searching for replacement components to replace gluten qualities for attractive product quality and structure is product idea expertise. In this context, non-gluten ingredients such as starch, sourdough, gums/hydrocolloids, hydroxypropyl methylcellulose, whey protein, and dietary fiber help to improve gluten-free bread quality. Furthermore, adding Gum to gluten-free flour enhances dough features by boosting water absorption capacity and making the dough viscoelastic, resulting in enhanced loaf and specific volume, soft texture, and a longer shelf life by delaying bread staling. Food gums could be widely used in the baking industry to improve water holding capacity, control food pasting properties and improve moisture content, modify product texture, volume, and cell structure, and maintain overall product quality during storage and shelf life by keeping moisture content constant and delaying staling. The goal of this study was to accesses the rheological characteristics and quality of non-gluten components for dough quality enhancement.

Effect of hydrocolloid on characteristics of gluten free bread from rice flour and fermented cassava flour (Fercaf)

Gluten free (GF) bread was made from rice flour and fermented cassava flour. Fermented cassava flour (FERCAF) was produced using a specific design of closed and circulated fermenter, which resulted on a white and neutral aroma flour. However, FERCAF did not have structural component (such as gluten) to provide dough's viscoelasticity and ability to retain gas to hold the volume of bread after baking. Hydrocolloids were added to FERCAF based GF bread to increase water binding of dough. This research aimed to investigate the effect hydrocolloids addition on the characteristics of GF bread made from rice flour and fermented cassava flour (FERCAF). Effect of hydrocolloids to flour ratio (2 %, 3 % and 5 %-wt) and types of hydrocolloid (xanthan gum, agar, and carrageenan) on specific volume of bread, bake loss, bread texture, and microstructure of the bread were investigated. Bread textures were measured using Texture Profile Analyzer (TPA), and microstructure was analysed by SEM. Data experiment showed that addition of hydrocolloids improved GF bread characteristics, specifically increased volume specific, increased porosity, and reduced hardness of GF bread.Keywords: gluten-free bread; cassava; fermented cassava flour; Fercaf; hydrocolloids

Karakteristik Roti Bebas Gluten Berbahan Dasar Pati Ganyong Termodifikasi

Modified canna starch by Heat Moisture Treatment (HMT) and xanthan gum (GX) showed had potential used in the formulation of gluten-free breads. This study aimed to explore the phyiscals and sensory caharacteristics of gluten-free breads from some types of modified canna starch. The main material was some types of modified canna starch. The study was applied Completely Randomized Design with one treatment factor of starches type (HMT-GX and HMT modified canna starches, natural canna starch with and without 1.5% of xanthan gum addition, corn starch, and wheat flour). While the characteristics of bread determined include: specific volume, color, texture, ratio between height and diameter of bread, and sensory. The results showed that the best treatment based on physical and sensory characteristics was produced using HMT-GX modified canna starch. The characteristics of gluten free bread produced have a specific volume of 2.85 ± 0.017 cm3/g, color (L *, a *, b * 75.13, +9.370; +29.40, respectively), texture of 109.03 ± 7.50 gf, bread high and diameter ratio of 0.74, hedonic score for taste, color, texture and aroma respectively 5.34; 5.46; 5.56, and 5.80 repectively (range of hedonic values from 1 = very dislike to 7 = very like).

Physico-chemical and sensory characteristics of gluten-free breads made with pine nuts (Araucaria angustifolia) associated to other flours

ABSTRACTPine nuts are the seeds of Araucaria angustifolia, which have a good nutritional value and relevance to be investigated in food technology, especially in bakery products for celiac people. This study aimed to evaluate physico-chemical and sensory properties of gluten-free breads made with pine nuts. Four different formulations (T1, T2,T3, and T4) of bread were prepared, varying the percentages flours, and were submitted to physical, chemical, and sensory analysis. The formulation made with pine nut and potato starch and the one made with pine nuts associated with potato starch and rice flour are promising alternatives for celiac patients.

Characteristics of gluten-free bread: quality improvement by the addition of starches/hydrocolloids and their combinations using a definitive screening design

To establish factors affecting the quality of gluten-free bread based on rice semolina supplemented with field bean semolina and improving its final quality, a new study with definitive screening design was conducted after an appropriate choice of six factors: agar–agar, water, two types of gums gum arabic and locust bean gum, and two types of starches tapioca starch and corn starch. We investigated the effect of the aforementioned parameters on specific volume, hardness, chewiness, and springiness of breads. The results showed that specific volume of gluten-free breads increased significantly (p < 0.05) with the addition of gum arabic, tapioca and corn starches, and water; addition of agar–agar, gum arabic, tapioca starch and water affected the hardness. With regard to chewiness, the results showed that gum arabic and water and also the interaction between them had a significant effect. Gum arabic, tapioca and corn starches, and water affected the springiness. In addition, we observed the interactions among the additives. For all the tested parameters, water and gum arabic had statistically significant (p < 0.0001) effect and affected all the properties of examined breads. These factors were retained for process characterization of optimized gluten-free bread. The final optimum formulation of rice/field bean contained 1.5% of gum arabic and 71.5% of water. The optimum gluten-free bread with gum arabic showed high volume, good textural, structural, and sensory qualities with high acceptability compared to the gluten-free control bread without any improver.

Effects of Xanthan Gum and Guar Gum on the Quality Characteristics of Gluten-free Bread using Teff (Eragrostis tef) Flour

This study investigated quality characteristics and sensory properties of gluten-free bread using teff flour and various gums. The five samples used in this study were control (wheat flour), T (teff flour), TG (teff flour, guar gum), TX (teff flour, xanthan gum), and TGX (teff flour, guar gum, xanthan gum). Baking loss, moisture content, pH, salinity, brix, dough expansion, color value, texture property, and sensory property were measured for each sample. As a result, pH was the highest in TX at 6.11 and the lowest in the control at 5.77. Salinity was the highest in the control at 0.80% and lowest in TG at 0.04%. Brix was the lowest in TX at 1.10 °Bx. While moisture content was the highest in the control at 43.58%, gluten-free breads using teff flour had no significant difference (p<0.05). Baking loss rate of bread was no significant difference among samples (p<0.05). Dough expansion rate by fermentation was the highest in the control at 108.89% and the lowest in T at 17.84%. L-value of crust had no significant difference (p<0.05). For L-value of crumb, the control was the highest at 64.34 and T was the lowest at 33.84. In texture properties analysis, hardness was the highest in TGX at 16.00 N and the lowest in the control at 2.87 N. There was no significant difference in springiness (p<0.05). Chewiness was the highest in TX and TGX. The result of sensory properties was that while there were no significant differences in color, salty taste, flavor, and overall acceptability, there was a significant difference in softness and sweetness (p<0.05). These results showed that use of teff flour and gums rather than using only teff flour for bread manufacturing can improve quality characteristics in dough expansion and texture properties. It is considered that xanthan gum or guar gum are appropriate on bread using teff for quality characteristics.

Quality characteristics of gluten free bread from barnyard millet-soy flour blends.

The effects of formulation of leavened bread by using varying levels (for 50g base flour) of soy flour-barnyard millet blends (with 5.74, 6.25, 7, 7.75 and 8.26g of soy flour), yeast (1.83, 2, 2.25, 2.5 and 2.67g) and salt (0.63, 0.8, 1.05, 1.30 and 1.47g) on textural, colour and specific volume were determined. A central composite rotatable design of response surface methodology was used to plan the experiments. The second order models obtained were observed to be statistically significant and capable of demonstrating the effects input variables on responses. All the textural properties were affected significantly by amount of soy flour and yeast in the dough. Soy flour had a significant effect on the colour of the bread making it more brown. Interaction of soy flour and yeast affected the specific volume to maximum extent. Two-tailed t test established that the efficacy of the models as no significant was observed between the predicted and the actual values.

Protein enrichment and its effects on gluten-free bread characteristics

Protein-enriched, rice-based flours, composed of casein and albumin protein isolates as well as transglutaminase for reinforcing protein networks, were designed for optimising a gluten-free formulation suitable for breadmaking. Experimental design resulted in composite protein-enriched blends with different pasting, mechanical and surface-related textural properties. The presence of transglutaminase resulted in a significant decrease of all the protein fractions, which suggested protein crosslinking. Protein isolates significantly (p < 0.05) modified the gelatinisation and gelling behaviour of the flour, reducing both its peak viscosity and final viscosity. The textural properties were primarily affected by the addition of casein and transglutaminase. The design allowed the determination of the optimum formulation for obtaining the highest specific volume of gluten-free baked product with the lowest crumb hardness by combining transglutaminase (1.35 U of enzyme/g of rice flour protein), egg albumin (0.67 g/100 g of flour) and casein (0.67 g/100 g of flour). The use of albumin and casein protein isolates and transglutaminase constitutes a promising approach to producing protein-enriched blends for making fermented, gluten-free products.

TECHNOLOGICAL AND NUTRITIONAL PROPERTIES OF BREAD PREPARED WITH DIFFERENT PROPORTIONS OF RICE FLOUR AND EXTRUDED RICE FLOUR

In order to prepare gluten-free bread for celiac disease patients, the objective of this study was to verify the influence of extruded rice flour (FAE) on technological and nutritional characteristics of gluten-free breads. The mixtures were prepared substituting the polished rice flour by 10, 25, 50 and 75% of FAE. The breads were evaluated according to weight loss when baking, specific volume, density, crust and crumb color, crumb texture during storage, chemical composition, and total caloric value of the bread. The addition of FAE increased both weight loss and bread volume, thus reducing its density. FAE as compared to control. Addition of FAE increased the chromaticity a* of the crumb and the crust, while the b* chromaticity decreased as compared to control. The addition of a level up to 25% of FAE in the bread formulation caused a reduction in hardness during 120 hours of storage as compared to the control treatment (without FAE). Control bread presented higher total caloric value as compared to the other treatments. Carbohydrate and protein content did not differ statistically among the treatments; however the increase of FAE in the formulations promoted a gradual reduction in the fat content.

Chemical Compositions and Physico-Chemical Properties of Malted Sorghum Flour and Characteristics of Gluten Free Bread

Chemical Compositions and Physico-Chemical Properties of Malted Sorghum Flour and Characteristics of Gluten Free Bread

Influence of unicellular protein on gluten-free bread characteristics

The objective of this work was to study the characteristics of three gluten-free bread formulations and the effect of the inclusion of unicellular protein. Bread recipes were starch-based, starch-vegetable-based and flour-based and the same recipes with added unicellular protein. Flour-based breads had lower specific volume values (2.2–2.3 cm3/g) than starch-based breads (3.1–3.3 cm3/g). Starch-based and starch-vegetable-based formulations with unicellular protein showed less bake loss (18.3 and 17.8%) than their counterparts (21.1 and 19.6%) probably due to increased water retention caused by unicellular protein. Flour-based recipes resulted in the firmest crumb, mainly caused by the high content in dietary fiber. The addition of unicellular protein resulted in a darker crumb color, and significant differences were also found in crumb color because of ovalbumin addition. Confocal scanning laser microscopy results showed a more compact microstructure in flour-based recipes compared with starch-based and starch-vegetable-based formulations. Starch-vegetable-based formulations without unicellular protein were the most preferred by consumers, followed by starch-vegetable-based formulations with added protein. Main differences detected by consumers were related to texture attributes. No major changes in shelf-life could be attributed to differences in formulation.

Crust and crumb characteristics of gluten free breads

Gluten free breads often have poor crust and crumb characteristics and the current study was conducted to help alleviate this problem. A commercial wheat starch (Codex Alimentarius) gluten free flour was supplemented with seven dairy powders (0%, 3%, 6%, 9% inclusion rates based on flour weight). Initially a fixed water level was used (trial 1) and the resulting batters were proofed and baked. The breads were tested 24 h after baking. Powder addition reduced loaf volume by circa 6% ( P<0.001). Increasing the inclusion levels of the powders decreased loaf volume ( P<0.001) with a decrease of 8% for the highest level. Powder addition generally decreased the crumb L */ b * (white/yellow) ratio. Crust L * values were significantly reduced. All of the powders increased crumb hardness ( P<0.001) with the exception of demineralised whey powder. Ten and 20% additional water (trial 2) was added to the formulation and the resulting breads had higher volume, and a much softer crust and crumb texture. Sensory analysis revealed a preference for breads containing skim milk replacer, sodium caseinate and milk protein isolate.