scholarly journals Rheological Characteristics of Composite Flour with Linseed Fibre – Relationship to Bread Quality

2017 ◽  
Vol 35 (No. 5) ◽  
pp. 424-431
Author(s):  
Hrušková Marie ◽  
Švec Ivan
Keyword(s):  
Wheat Flour ◽  
Principal Component ◽  
Bread Quality ◽  
Rheological Parameters ◽  
Composite Flour ◽  
Fermentation Time ◽  
Crumb Firmness ◽  
Pasting Temperature ◽  
Detailed Specification ◽  
Flax Seeds

Linseed fibre represents a rich natural source of dietary fibre. Here, we report that the addition of linseed fibre at levels of 2.5 and 5.0% changes the viscosity of wheat flour as well as the rheological properties of non-fermented and fermented dough. The differences recorded between fibre from golden and brown flax seeds (GF and BF, respectively) were not significant; BF caused a stronger increase in non-fermented dough elasticity. The addition of both variants reduced fermentation times and partially decreased dough volumes during the three phases of the fermentation process. The results of the baking test corresponded with the altered rheological parameters of dough. Based on principal component and cluster analyses, representative features for each rheological test were identified: amylograph maximum (amylograph test), the pasting temperature (RVA test), dough softening degree (farinograph test), extensigraph ratio (extensigraph test) were selected as the representative features. For the evaluation of fermented dough behaviour, wheat flour-linseed fibre composites could be differentiated according to fermentation time (fermentograph test) and dough volume (OTG test). Statistics also confirmed the appropriateness of the crumb firmness parameter for a detailed specification of bread quality.

Simple tests as tools for vital wheat gluten evaluation

2018 ◽  
Vol 120 (7) ◽  
pp. 1590-1599 ◽  
Author(s):  
Fernanda Ortolan ◽  
Karoline Urbano ◽  
Caroline Joy Steel
Keyword(s):  
Wheat Flour ◽  
Specific Volume ◽  
Pearson Correlation ◽  
Wheat Gluten ◽  
Bread Quality ◽  
Rheological Parameters ◽  
Content Type ◽  
Crumb Firmness ◽  
Vital Wheat Gluten

Purpose The purpose of this paper is to evaluate the viscoelastic quality of commercial vital wheat glutens from different origins (A and B) through simple tests, and correlate these results with dough rheological parameters measured using more complex equipment (farinograph and extensograph) and with bread quality characteristics (specific volume and crumb firmness) obtained from wheat flour fortified with 7 g/100 g of vital gluten. Design/methodology/approach For the evaluation of vital gluten quality, two commercial vital wheat gluten named A and B were used. The simple tests performed with these samples were wet and dry gluten contents and index gluten, extensbility test and expansion test. The Pearson correlation was performed among data from dough rheological tests (farinograph and extensograph) and bread quality parameters (specific volume (SV) and crumb firmness) obtained from the fortification of wheat flour with 7 g/100 g of VGA or VGB (previous work, data not shown). Findings The simple tests showed differences in the viscoelastic properties of vital gluten A and B; vital gluten A presented higher elasticity and lower extensibility than vital gluten B, and the gluten ball of sample A presented higher SV. By correlation analysis, it was verified that the simple tests studied may be useful to assess the baking performance of commercial vital gluten when this product is added to wheat flour for its fortification. Furthermore, the results indicate the need for more information on vital wheat gluten proteins for its commercialisation and use. Originality/value This work is very important, not just for the scientific community, but also for the bakery industry, that requires more information about vital wheat gluten before its use in bread making. As there are great differences in the protein quality of commercial vital wheat glutens and their functionality, the study was developed to solve this problem.

scholarly journals Bread quality characteristics as influenced by the addition of tomato seed flour

2016 ◽  
Vol 73 (2) ◽  
pp. 77 ◽  
Author(s):  
Silvia MIRONEASA ◽  
Georgiana Gabriela CODINA ◽  
Mircea Adrian OROIAN
Keyword(s):  
Wheat Flour ◽  
Principal Component ◽  
Sensory Characteristics ◽  
Bread Quality ◽  
Loaf Volume ◽  
Bread Making ◽  
Tomato Seed ◽  
Overall Acceptability ◽  
Seed Flour ◽  
Volume Porosity

The aim of this investigation was to incorporate tomato seed into bread in order to improve it quality. Whole ground tomato seed at different levels (0, 5, 10, 15 and 20%) was used to replace wheat flour 650 type of a very good quality for bread making to make bread. Bread quality through physical, colour, crumb cell, textural and sensory characteristics were analyzed and compared with those of bread without tomato seed. The substitution of wheat flour with 10% tomato seed has the effect of highest values for loaf volume, porosity and elasticity. Color intensity, expressed as the L*, a*, b* values of breads with tomato seed were lower than those of control bread. The hardness of bread samples increased with the increase level of tomato seed addition. Also, the addition of increasing amounts of tomato seed highlighted large cells in crumb structure of bread. Sensory characteristics showed that bread samples with addition of 5 or 10% tomato seed to wheat flour were similar from of point of view of overall acceptability, but 20% addition resulted in slightly acceptable samples. Principal Component Analysis revealed significant correlations (p < 0.05) between bread physical characteristics, loaf volume, porosity, elasticity and bread overall acceptability at different tomato seed flour addition levels in wheat flour. Overall, tomato seed flour could be incorporated up to levels of 10% into bread to provide its beneficial health effects, not negatively changing its quality.

Evaluating the traditional bread properties with new formula: Affected by triticale and cress seed gum

2020 ◽  
pp. 108201322096177 ◽  
Author(s):  
Zahra Sheikholeslami ◽  
Maryam Mahfouzi ◽  
Mahdi Karimi ◽  
Toktam Hejrani ◽  
Mahdi Ghiafehdavoodi ◽  
...  
Keyword(s):  
Wheat Flour ◽  
Rheological Parameters ◽  
Composite Flour ◽  
General Acceptance ◽  
Positive Effects ◽  
Volume Porosity ◽  
Cress Seed ◽  
Traditional Bread ◽  
Seed Gum ◽  
New Formula

During recent years, composite bread is more popular among consumers due to its functional and nutritional properties. Among cereals, triticale has been studied, along with careful observation of its characteristics. In addition, hydrocolloids can be replaced as an appropriate resource due to a decrease in the gluten content. The present study aimed to evaluate the effect of triticale flour replacement at the levels of 0, 100, 150, and 250 g/kg, and cress seed gum at the concentrations of 0, 3, 6, and 10 g/kg on the rheological parameters of dough and physicochemical, textural, microstructural, and sensory properties of bread. Based on the results, formula including composite flour (150 g/kg triticale flour+850 g/kg wheat flour) and cress seed gum at 6 g/kg was the best formulation for improving the texture, color parameters, and general acceptance of both types of bread (Barbari and Lavash). Regarding the Iranian Barbari bread, cress seed gum increased the specific volume, porosity, and brightness, while reduced the hardness compared to the control. Besides, sensory evaluation manifested that 150 g/kg of wheat flour could be replaced with triticale flour for providing a good quality of bread. In conclusion, the addition of 150 g/kg of triticale and 6 g/kg of cress seed gum into composite flour and bread formulations had positive effects on all properties measured in both types of bread.

scholarly journals Application of solvent retention capacity tests for prediction of rheological parameters of wheat flour mill streams

2020 ◽  
Vol 74 (1) ◽  
pp. 37-49
Author(s):  
Milan Vukic ◽  
Elizabet Janic-Hajnal ◽  
Jasna Mastilovic ◽  
Dragan Vujadinovic ◽  
Marko Ivanovic ◽  
...  
Keyword(s):  
Rheological Properties ◽  
Wheat Flour ◽  
Correlation Coefficients ◽  
Principal Component ◽  
Rheological Parameters ◽  
Least Squares Regression ◽  
Retention Capacity ◽  
Swelling Properties ◽  
Solvent Retention ◽  
Flour Mill

This paper presents relationship between the rheological properties of dough and individual polymer swelling properties in wheat flour mill streams. The swelling properties were measured by applying the Solvent Retention Capacities (SRC) tests. Significant correlation coefficients were determined for certain rheological parameters. In an effort to extract additional insights from the properties measured, a multivariate analysis was used to develop relationships between the studied parameters. To determine relevant relationships among the parameters, the data exploration step by the Principal Component Analysis was performed. Then, multivariate Partial Least Squares Regression (PLSR) models were developed, to predict certain empirical rheology parameters based on the SRC parameters. The processing of experimental data indicated the possibility of using SRC parameters for predicting rheological properties in conjunction with a suitable mathematical model. The presented approach may be useful for rapid prediction of wheat flour mill streams characteristics and for optimization of the end-flour performances.

scholarly journals Effect of glucomannan and xanthan gum proportion on the physical and sensory characteristic of gluten-free bread

2021 ◽  
Vol 924 (1) ◽  
pp. 012028
Author(s):  
A Sutrisno ◽  
S S Yuwono ◽  
I Ikarini
Keyword(s):  
Wheat Flour ◽  
Specific Volume ◽  
Xanthan Gum ◽  
Raw Materials ◽  
Rice Flour ◽  
Cassava Starch ◽  
Raw Material ◽  
Bread Quality ◽  
Gluten Free ◽  
Crumb Firmness

Abstract The increasing consumption of white bread causes the demand for raw materials, especially wheat flour to be increased. Whereas the availability of wheat as wheat flour raw material still depends on import supply. Gluten-free bread processing, which is not depending on wheat flour, is necessary to suppress excessive wheat import. As alternatives, flour derived from cereals and tubers, such as rice, corn, potato, and cassava, can be used in bread processing. The absence of gluten from the bread composition results in pale, less fluffy bread and firm crumb, and therefore it is necessary to modify the batter to improve gluten-free bread quality. This research aims to know the effect of the supplement of hydrocolloids glucomannan and xanthan gum on gluten-free batter properties and bread quality. Breads were made of rice flour, potato flour, corn and cassava starch. Batter consistency, bread specific volume (SV), crumb analysis, crust colour, crumb firmness, firmness, cohesiveness and panellists’ preference were determined. This study showed that the combination of xanthan gum: glucomannan on proportion 0.75:0.25 was the highest batter consistencies, highest specific volume, lower firmness, highest cohesive, and most preferred by panellists.

Quality of wheat breads enriched with flour from germinated amaranth seeds

2021 ◽  
pp. 108201322110165
Author(s):  
Luciano M Guardianelli ◽  
María V Salinas ◽  
María C Puppo
Keyword(s):  
Relaxation Time ◽  
Elastic Modulus ◽  
Wheat Flour ◽  
Specific Volume ◽  
Bread Quality ◽  
Maximum Volume ◽  
High Area ◽  
Amaranth Flour ◽  
Fermentation Parameters

Amaranth flour from germinated (GA) and non-germinated (A) seeds (0%-C, 5%, 15%, 25%) were mixed with wheat flour for breadmaking. Fermentation parameters of dough (time-tf, maximum volume-Vmax) were obtained. Specific volume (Vsp) of breads, crust color, texture and relaxation of crumb were analyzed. A high amount of germinated amaranth flour decreased Vmax and increased tf, obtaining breads with low Vsp and darkness crust. A firmed and chewy crumb, although with a more aerated structure (high area occupied by alveoli) was obtained. The GA25 bread presented the softer crumb. The elastic modulus-E1 of crumb increased and the relaxation time-T1 decreased with higher amounts of amaranth flour, suggesting the formation of a more structured crumb; mainly in the case of non-germinated amaranth flour. Wheat flour resisted the inclusion of 25% of germinated amaranth seeds (GA25) without substantial changes in bread quality.

scholarly journals Analytical Rheology of Honey: A State-of-the-Art Review

Foods ◽  
2021 ◽  
Vol 10 (8) ◽  
pp. 1709
Author(s):  
Célia Faustino ◽  
Lídia Pinheiro
Keyword(s):  
Sugar Content ◽  
Rheological Behaviour ◽  
Principal Component ◽  
Rheological Parameters ◽  
Experimental Conditions ◽  
Thixotropic Behaviour ◽  
Ancient Times ◽  
Medicinal Properties ◽  
Complex Relationships ◽  
Temperature Time

Honey has been used as a nutraceutical product since ancient times due to its nutritional and medicinal properties. Honey rheology influences its organoleptic properties and is relevant for processing and quality control. This review summarizes the rheological behaviour of honeys of different botanical source(s) and geographical locations that has been described in the literature, focusing on the relation between rheological parameters, honey composition (moisture, water activity, sugar content, presence of colloidal matter) and experimental conditions (temperature, time, stress, shear rate). Both liquid and crystallized honeys have been addressed. Firstly, the main mathematical models used to describe honey rheological behaviour are presented highlighting moisture and temperature effects. Then, rheological data from the literature regarding distinct honey types from different countries is analysed and results are compared. Although most honeys are Newtonian fluids, interesting shear-thinning and thixotropic as well as anti-thixotropic behaviour have been described for some types of honey. Rheological parameters have also been successfully applied to identify honey adulteration and to discriminate between different honey types. Several chemometric techniques have also been employed to obtain the complex relationships between honey physicochemical and rheological properties, including partial least squares (PLS), principal component analysis (PCA) and artificial neural networks (ANN).

scholarly journals Evaluation of different hydrocolloids to improve dough rheological properties and bread quality of potato–wheat flour

2017 ◽  
Vol 54 (6) ◽  
pp. 1597-1607 ◽  
Author(s):  
Xingli Liu ◽  
Taihua Mu ◽  
Karim Diego Yamul ◽  
Hongnan Sun ◽  
Miao Zhang ◽  
...  
Keyword(s):  
Rheological Properties ◽  
Wheat Flour ◽  
Bread Quality ◽  
Dough Rheological Properties

THE USE OF DRY GERM FLAKES IN THE PRODUCTION OF BREAD FROM WHEAT FLOUR

2021 ◽  
Author(s):  
A. V. Volkova ◽  
◽  
S. P. Kuzmina
Keyword(s):  
Quality Indicators ◽  
Wheat Flour ◽  
Wheat Germ ◽  
Bread Quality ◽  
Composite Mixture

The paper analyzes the effect of dry wheat germ flakes on bread quality indicators. It is recommended in the production of bread from wheat flour of the highest grade with the use of dry wheat germ flakes to make them in an amount of 3% by weight of the composite mixture.

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