Types Of Flour Research Articles

Physicochemical and microbiological properties of Arabic flatbread produced from wild natural sour starters

Background and objectivesExtensive research studies worldwide have discussed and analyzed the sourdough nutritional, chemical, and biotechnological aspects of western types of bread. However, the literature on sourdough usage in Arabic bread processing is very limited. The present study aimed to come up with a new fermentation technique at the bakery level. The new technique is hoped to reveal the traditional nostalgic characteristic flavor of Arabic bread produced using natural sourdough instead of the traditional yeasted dough and study its effect on the resulting bread. Three types of flour (straight grade, whole wheat, and rye) that are ordinarily used in Jordan were used to prepare three natural sour starters using the backslopping technique. FindingsDominant yeast species isolated from the traditional sour starter of the local Jordanian whole wheat were Saccharomyces cerevisiae, Candida glabrata, and Zygosaccharomyces spp., while rye and straight-grade starters showed different domination patterns. The dominant species of lactic acid bacteria (LAB) isolated from the traditional sour starter of the local Jordanian whole wheat (Horani cultivar) were Lactiplantibacillus plantarum2, Lactobacillus delbrueckii ssp bulgaricus, and the Lacticaseibacillus paracasei ssp paracasei3, while mixed strains of LAB isolates were obtained for the rye and straight-grade flour starters on day 7 of preparation.The pH results showed no significant differences (P > 0.05) between the three types of sour starters, while the total titratable acidity (TTA) results showed a significant increase (P ≤ 0.05) in whole wheat sour starters with a TTA value of 11.17 ± 0.11 ml 0.1 N NaOH/10g dough. The 20% and 30% straight-grade sour bread samples and the control exhibited the highest scores in terms of acceptability and total quality scores. ConclusionsThe incorporation of sourdough in Arabic flatbread processing showed remarkable results in extending the shelf life by using natural ingredients, improving the quality, and providing tastier and more convenient bread.

Quality Characteristics of Sourdough Bread with The Addition of Water Yest and Wheat-Mocaf Flours Combination

Sourdough bread embraces health benefits due to the fermentation process carried out in the manufacturing process. The quality of sourdough bread is influenced by the specific microbes (yeast) that develop in the sourdough and the type of flour. The purpose of this study was to determine whether the type of fruit water yeast and the combination of wheat flour and mocaf could affect the quality of sourdough bread. The research design used was a factorial, completely randomized design with two factors and three replications. Water yeast from apple and salaca fruits as the first factors, and the second factor is a combination of wheat flour and mocaf as much as (100:0), (80:20), and (60:40). Physico-chemical and organoleptic characteristics were observed in the study. ANOVA and DMRT further tests were used for data analysis. Research shows the type of fruit water yeast can affect the moisture and carbohydrate content of sourdough bread. The combination of wheat flour and mocaf has a significant effect on the physical (hardness), chemical (content of water, ash, fat, protein, and carbohydrates), and organoleptic qualities (colour and the hedonic quality of texture) The combination of wheat flour and mocaf as much as 60:40 is a combination that produces sourdough bread of the highest quality. Keywords: Apple, Mocaf, Sourdough, Wheat flour, Zalacca

Comparative Study on Rheological Properties of Wheat Flour Types for Industrial Usage

<span lang="EN-US">Wheat, <em>Triticum aestivum</em> is one of the grains consumed worldwide as a staple food used in a variety of processed commodities. </span><span lang="IN">The r</span><span lang="EN-US">heological properties of the raw commodity will define the end product’s characteristics, whether it is of high quality or not. Moreover, the processes of, e.g., grinding, crushing, etc., of grain will also determine the flour’s content, which will further go on for other processes and be delivered to the consumer in the end product. </span><span lang="IN">To that end</span><span lang="EN-US">, the properties and effects of different wheat flour contents were analyzed for different types of flour 550, 1050 and whole grain flour available in Germany. These samples were analyzed to select the best-suited commodity for industrial purposes. Falling number, gluten percentage, starch content, viscosity and farinograph were determined for flour </span><span lang="IN">during</span><span lang="EN-US"> baking test and bread volume for its products. Three types of flour with different content percentages were tested for comparison </span><span lang="IN">to</span><span lang="EN-US"> find the best-suited type for the baking purpose among them. Among the types 550, 1050 and whole grain flour, the parameters are fitter for bread baking process is 550 type as the results show falling number = 450.25; 334; 296.87; starch (%) = 75.45; 69.72; 64.75; gluten (%) = 38.65; 31.84 and 21.44, and bread volume is 400, 340 and 300 ml respectively. This study suggested that flour with more starch content and a falling number will produce a reasonable volume and more appealing bread regarding sensory attributes.</span>

Bioaccessibility of Maillard Reaction Products from Biscuits Formulated from Buckwheat Flours Fermented by Selected Lactic Acid Bacteria.

The in vitro bioaccessibility of the soluble protein and Maillard reaction products (MRPs) such as furosine (an early indicator of the MR), free FIC (fluorescent intermediate compounds), and FAST index (fluorescence of advanced MRPs and tryptophan), and the level of melanoidins defined by the browning index were analyzed in biscuits formulated from raw and roasted common buckwheat flours fermented by select lactic acid bacteria (LAB). The content of soluble proteins in fermented buckwheat flour and biscuits before and after digestion in vitro was significantly dependent on the LAB applied and the type of flour used and was the highest in the digested biscuits, indicating increased bioaccessibility. Generally, in all analyzed biscuits a lower furosine content was observed as compared to control samples, and its high bioaccessibility was noted after digestion. The free FIC in biscuits was strain-dependent, resulting in low bioaccessibility with the exception of biscuits obtained from both types of flours fermented by Streptococcus thermophilus MK-10. Compared to control biscuits obtained from raw buckwheat flour, the almost twice-increased FAST index was found for samples fermented by L. plantarum IB or Streptococcus thermophilus MK-10. After digestion, at least a fivefold higher value of the browning index was noted in control and tested biscuits, indicating the high bioaccessibility of melanoidins. This study indicates that fermentation of buckwheat flours by selected lactic acid bacteria seems to be a good way to obtain a product with high bioaccessibility of MRPs. However, further research on their functional properties is needed.

Chemical and Pasting Properties of Potato Flour (Solanum tuberosum L.) in relation to Different Processing Techniques

Processing potato tubers into flour can be done using various methods, which can impact the flour’s nutritional and pasting properties. This study evaluated the effects of five different processing methods, namely, low-temperature blanching, followed by oven drying (LTB_OD), high-temperature blanching followed by oven drying (HTB_OD), boiling followed by oven drying (Boiling_OD), freeze drying (FD), and oven drying (OD), on the nutritional and pasting properties of potato flour derived from Shangi potato variety. The relationships between the nutritional and pasting properties were determined using Pearson’s correlation and principal component analyses (PCA). The results indicated that freeze-dried flour exhibited higher protein content (10.17%), sucrose (88.87 mg/100 g), and magnesium (44.90 mg/100 g) content, while Boiling_OD flour showed the lowest protein (6.41%), sucrose (15.34 mg/100 g), and magnesium (35.55 mg/100 g) content. All potato flour types demonstrated a decrease in apparent viscosity with increasing shear rate, with freeze-dried flour having the highest apparent viscosity. Freeze-dried flour showed the highest peak viscosity (7098.33 cP) and breakdown viscosity (2672.00 cP). The highest final viscosity (7989.00 cP) was recorded in HTB_OD flour. Protein ( r = − 0.92 ), fiber ( r = − 0.81 ), and fat ( r = − 0.83 ) negatively correlated with the peak viscosity, while sugars (glucose ( r = 0.95 ), fructose ( r = 0.93 ), and sucrose ( r = 0.87 )) and phosphorus ( r = 0.86 ) positively correlated with pasting properties. The first two principal components explained 90.2% of the total variance. Oven drying and freeze drying were in close proximity in the PCA score plot, indicating that these two flour types have similar chemical and pasting properties. In conclusion, the different processing methods altered the chemical and pasting properties of the flour, therefore influencing their potential use in the food industry. Considering the correlations established in this study, it is likely that chemical properties could be used to predict the pasting properties of potato flour.

Techno-Functional and Rheological Properties of Alternative Plant-Based Flours

The use of alternative vegetal sources is a proposed strategy to improve the diversity and quality of plant-based products on the market, currently led by soy and pea. This study compares the techno-functional properties of seven vegetable flours (chickpea, lentil, red lentil, white bean, quinoa, amaranth, and oat) and the rheological properties of their flour pastes and gels. All techno-functional properties significantly (α = 0.05) varied depending on the type of flour. Among the flours studied, the highest swelling capacity was for white bean and the lowest for chickpea and red lentil. Water holding capacity was high for white bean and oat flours and low for red lentil. Oat and quinoa flours had the highest oil-holding capacity. Emulsifying and foaming capacities were high for all pulse flours but poor for amaranth and oat flours. However, amaranth and oat provided a much higher viscosity during heating than the rest of the flours. The viscoelastic properties of the flour pastes indicated that they all had a gel structure with storage modulus (G') values over loss modulus (G″) values. From the viscoelastic properties, amaranth and quinoa showed a weak gel structure with low G' and G″ values, and the chickpea, lentil, and red lentil formed pastes with a high elastic contribution (high G' values). In agreement, these three pulse flours were the only ones able to form hard, self-standing gels. These results show the potential of vegetal flours from alternative sources in the development of new plant-based products.

Occurrence of mycotoxins and microbial communities in artisanal infant flours marketed in Côte d'Ivoire.

The aim of this study was to determine the microbial diversity and mycotoxin profile of artisanal infant flours commonly vended in public healthcare centres and retail markets in Côte d'Ivoire. Thus, maize, millet, sorghum, soya and multigrain (mix of different cereals) flour samples collected from different localities were first, analysed for nutritional composition, then for microbial communities using high-throughput sequencing and for mycotoxins through UHPLC-MS/MS method. Firmicutes was the most abundant bacterial phylum and the dominant genera were Weissella, Staphylococcus, Pediococcus. Potential pathogenic genera such as Bacillus, Enterobacter, Acinetobacter and Burkholderia were also found. The fungal community was composed of two dominant phyla (Ascomycota and Basidiomycota) and 31 genera with > 0.1% relative abundance. In samples from public healthcare centres, Candida, Hyphopichia, Trichosporon, and Cyberlindnera were the most dominant genera according to the flour type while in samples from retail markets, they were Cyberlindnera, Clavispora, Nakaseomyces, Aureobasidium and Candida. Possible toxigenic genera Fusarium and Aspergillus were also detected. Aflatoxin B1 (AFB1), Ochractoxin (OTA), Fumonisin B1 (FB1) and B2 (FB2) were the mycotoxins found in the analysed flours. AFB1 was detected in 100% of maize (range 1.2-120.5µg/kg; mean: 44.2µg/kg) and 50-83.3% of millet flours (range 0.2-31.5µg/kg; mean: 31.5µg/kg). Its level in all maize and rice flour samples exceeded EU standard (0.1µg/kg). For OTA and fumonisins, millet and maize flours showed the highest levels of sample exceeding the EU standard. Thus, artisanal infant flours marketed in Côte d'Ivoire, mainly maize and rice flours, although containing potentially beneficial bacteria, represent potential health risks for children.

Mass‐Independent Moisture Percentage Measurements of Flour Using Amplitude Attenuation and Phase Shift Correlation

We performed mass‐independent moisture percentage measurements of flour by using a resonant cavity at 3.9 GHz. The method evaluated the straight line slope that linearly approximates the relationship between the amplitude attenuation and phase shift at a specific frequency for multiple masses of sample. Fifty types of flour with moisture percentage ranging from 9.3% to 17.4% and mass up to 0.3 g were used in this experiment. The standard error of the estimation of the calibration curve for the moisture percentage was 0.42%, which was approximately half of that of the conventional method. © 2023 Institute of Electrical Engineers of Japan. Published by Wiley Periodicals LLC.

Effect of Food Matrix, Cooking and Preservation Modalities on the Outgrowth of Bacillus cereus Spores in Some Starchy Foods

Aim: Starchy products are very important in the fight against food insecurity in developing countries, where they are widely consumed. This study is aimed to assess the impact of cooking and storage methods on the spoilage of some cooked starchy products by spore-forming bacteria
 Place and Duration: Department of Microbiology of the University of Yaoundé I betweenJune 2020 and September 2022
 Methodology: In order to better understand the alteration of these foods by spore-forming bacteria, a survey was carried out among some households and restaurant owners in the city of Yaoundé to determine the cooking and preservation methods for cassava, maize and rice couscous. Then, cooking parameters and conservation modalities from the survey were simulated in the laboratory in order to assess the deactivation kinetics of Bacillus cereus.
 Results: It emerged from this experiment that cooking time varies according to the foodstuffs, the most important being maize. The packaging is mainly done in non-food plastic bags, and the thermos is used more often than the fridge and the pot. Cassava flour was more contaminated in aerobic spore (1.105 spores/g) than maize and rice (5.103 and 9.103 spores/g) after cooking of different starchy food enriched with Bacillus cereus spores, their inactivation was more important in rice followed by cassava and maize couscous as indicated by the Weibull scaleparameters which were respectively 1.1; 0.52 and 0.08. It was also noted that increase in cooking time also reduced the time for spores to initiate outgrowth and this time was affected by the type of flour. These two parameters also affected the time of spore outgrowth to 5logufc/g.
 Conclusion: Storage in the fridge is still the best way to store food, but the thermos flask is more often used. The use of electric thermostats set at temperatures around 60°C would increase the optimal shelf life and significantly reduce the risk of spoilage and foodborne illness.

PEMANFAATAN TEPUNG BERAS MERAH DAN BERAS HITAM DALAM PEMBUATAN PRODUK EDIBLE SPOON

The most widely used tableware is plastic spoon. However, its usage can cause environmental problems in the form of plastic waste. This plastic waste can be overcome by alternative innovations of making environmentally friendly tablespoon or edible spoon. Edible spoon can be made from a mixture of cereal flour, namely wheat flour, red rice flour, and black rice flour. Gluten from wheat flour is used to form a sturdy edible spoon texture, while red rice flour and black rice have anthocyanin pigments that act as natural dyes and antioxidants. The type of cereal flour used affects the characteristics of the edible spoons produced. The purpose of this study was to determine the physical characteristics and antioxidant activity of edible spoons made from a mixture of flour and red rice flour as well as wheat and black rice flour. This experiment used a randomized block research design (RBD) with 6 levels of treatment comparing the use of wheat flour with red rice flour or black rice flour, namely 65:35; 60:40; 55:45; 50:50; 45:55; and 40:60. The research data was analyzed by ANOVA and DMRT (α=5%). The fracture power of black and red rice edible spoons ranged from 13,196±0,5312 to 71,545±0,0091 and 15,637±0,0113 to 37,348±0,0230, the rehydration power range of black and red rice edible spoons were 16,56±0,7332 to 25,75±0,0005 and 14,88±0,1357 to 17,81±1,3077, as well as the antioxidant activity for red rice edible spoons were 87,6250 to 97,5500 and black rice 85,1250 to 98,0250.

Determination of Regulated and Emerging Mycotoxins in Organic and Conventional Gluten-Free Flours by LC-MS/MS.

Gluten-free cereal products have grown in popularity in recent years as they are perceived as "healthier" alternatives and can be safely consumed by celiac patients, and people with gluten intolerance or wheat allergies. Molds that produce mycotoxins contaminate cereal crops, posing a threat to global food security. Maximum levels have been set for certain mycotoxins in cereal flours; however, little is known about the levels of emerging mycotoxins in these flours. The aim of this study was to develop an efficient, sensitive, and selective method for the detection of four emerging (beauvericin and enniatins A1, B, and B1) and three regulated (aflatoxin B1, zearalenone, and deoxynivalenol) mycotoxins in gluten-free flours. Ultrasound-assisted matrix solid-phase dispersion was used in the extraction of these mycotoxins from flour samples. The validated method was utilized for the LC-MS/MS analysis of conventional and organic wholegrain oat and rice flours. Six of the seven target mycotoxins were detected in these samples. Multi-mycotoxin contamination was found in all flour types, particularly in conventional wholegrain oat flour. Despite the low detection frequency in rice flour, one sample was found to contain zearalenone at a concentration of 83.2 μg/kg, which was higher than the level set by the European Commission for cereal flours. The emerging mycotoxins had the highest detection frequencies; enniatin B was present in 53% of the samples at a maximum concentration of 56 μg/kg, followed by enniatin B1 and beauvericin, which were detected in 46% of the samples, and at levels reaching 21 μg/kg and 10 μg/kg, respectively. These results highlight the need to improve the current knowledge and regulations on the presence of mycotoxins, particularly emerging ones, in gluten-free flours and cereal-based products.

Теоретичні аспекти доцільності створення безглютенових кексів, збагачених сиром кисломолочним, для закладів ресторанного господарства

In this article, the experience of using gluten-free flour for special-purpose confectionery products for restaurants was analyzed. Fortified cupcakes have high customer appeal and a higher nutritional value. A mix of rice and almond flour as an alternative to wheat flour, and cottage cheese with a fat content of 5% as source of protein were selected. The nutrition value, energy content, and biological value of the chosen raw materials (rice flour, almond flour and cottage cheese) were determined. A recipe for low-fat (less than 2,3 times) cupcakes with high protein content (more than 1,7 times) was created. The possibility of replacing wheat flour with other types of flour, such as rice flour and almond flour, in the ratio 2:1 was confirmed. The possibility of replacing a portion of the butter with cottage cheese in a 1:2:3 ratio was established. In the process of analyzing organoleptic properties, profile-graphics compositions for various properties like color, smell, shape, taste, and texture were made. The result shows that the new cupcakes have high-quality properties; the main difference is 24% due to the fact that the products have different taste, structure, and amount of water when compared to the control sample. Indicators for new cupcakes, such as moisture content (increasing to 5%) were determined. New cupcakes have a reduced fat content (43%)compared to the control sample. As a result of the experiments, the recipe for new fortified cupcakes for restaurants with high customer properties, nutrition, biological value, and low energy value was researched and justified. The new fortified cupcakes have good nutrition value with a high level of essential amino acids, which proves that the balance of essential amino acids is about the physiologically necessary norm.

Effect of Substitution Sago Flour with Tempeh Flour and Emulsifier Types on Characteristic of Bangkit Cookies

Bangkit cookie is a traditional Indonesian cookie that is particularly popular among the Malay people on Sumatra Island, particularly in Riau Province. Bangkit cookies are composed entirely of sago flour, which contains a high carbohydrate but low protein content. Tempeh flour's high protein content is expected to enhance the protein content of the cookies. In addition, the usage of emulsifier will also be expected to improve the texture of the bangkit cookies. This study aimed to determine the best type of tempeh flour for various kinds of beans, i.e., soybeans, green beans, and red beans, based on their highest protein content and to identify the best ratio of tempeh flour to sago flour and the type of emulsifier in the bangkit cookies formula based on their texture and sensory acceptance. This research was divided into two stages. The first research stage used a Completely Randomized Design with 1 factor (soybeans, green beans, and red beans). The second stage of research used a Completely Randomized Design 2 factors (ratio of soybean tempeh flour:sago flour 0:100, 80:20, 60:40, 40:60) and types of emulsifier (egg yolks, soy lecithin, monoglyceride). Research result shows that 80:20, 60:40, and 40:60 ratios of sago flour to soybean tempeh flour with egg yolk emulsifier, soy lecithin, and monoglyceride, increased the protein content by an average of 7.15-21.53% and increased the hardness value of bangkit cookies. The best bangkit cookies are made from the ratio of sago flour and soybean tempeh flour 80:20 with egg yolk emulsifier and meet the SNI of cookies, which have 4.14% of moisture content, 8.95% of protein content, 622.99 hardness, and 3.7 of taste scored which is closest to the control.

The effects of quinoa and okra incorporation on the quality of diet cake.

Producing quality products in baking industry has been facing several challenges including meeting the needs of the growing population, lack of sufficient water resources for producing enough wheat, lack of quality products made from wheat flour and high amount of waste. Recently, the quality of baking products has been improved by mixing different types of flour, which increases the nutritional value and improves the quality of the final product. This study evaluates the possibility of making a cake by incorporating wheat flour with quinoa and okra flour. Moreover, basil gum is used to improve the gluten network. The cake samples were prepared with quinoa flour at two levels (15 and 30%), okra flour at two levels (0.8 and 0.16%) and basil gum at a level of 0.4%; finally, their physicochemical, rheological, SEM, and sensory properties were evaluated. Based on the results, adding quinoa and okra flour and basil gum increases the density and consistency of the batter. Hardness, springiness, chewiness, cohesiveness, and adhesiveness of the blend Q2B1R was improved. The granule structure of the quinoa flour cakes were affected, and the gluten network was not well formed as shown in the electron microscopy images. However, the gluten network was improved in the samples with 0.4% basil gum and 0.8% okra flour. By adding okra and quinoa, better specific volume, porosity, and moisture content was obtained. Sensory evaluation of the cakes indicated that the blend Q2B1R was scored close to the control sample.

Acrylamide and hydroxymethylfurfural in cakes: An approach to reduce the formation of processing contaminants in sweet bakery products

In bakery products, beyond the heat treatment conditions, the type of flour and the combination with other ingredients in different ratios can increase or mitigate the formation of processing contaminants. In this study, a central composite design and a principal component analysis (PCA) were used to assess how the formulation affects the formation of acrylamide (AA) and hydroxymethylfurfural (HMF) in wholemeal and white cakes. The HMF levels (45–138 µg/kg) were up to 13 times lower than the AA (393–970 µg/kg) in cakes. The PCA showed that the proteins increased the AA formation during the dough baking, while the reducing sugar and the browning index were related to HMF formation in the cake crust. The total daily exposure of AA + HMF when consuming wholemeal cake is 1.8 times higher than white cake consumption, in which the values of margin of exposure (MOE), below < 10,000, demonstrated that AA showed a greater risk of exposure than HMF (MOE values > 10,000). Therefore, a good strategy to avoid high AA levels in cakes is to use of refined wheat flour and water in the formulation. In contrast, the advantage of wholemeal cake about their nutritional value should not be disregarded, thus, the use of water in its preparation and moderate consumption are strategies that could be adopted to reduce the risk of exposure to AA.

Comparison of Chemical, Physical and Sensory Properties of Cookies Made from Shellfish Flour

Abstract&#x0D; Cookies are a processed food product that has a small shape, crunchy texture and has a long shelf life. The limited mineral content in cookies makes cookies must be added to an ingredient that can increase minerals, namely clam shells. The high content of calcium in clam shells can be used as an option in making cookies. This study aims to determine the chemical, physical and sensory properties of cookies added with different types of shellfish flour. The experimental design used was a completely randomized design (CRD) with treatment of 3 different types of clam shell flour, namely batik clam shell flour, blood clam shell flour, and green mussel shell flour. The test results showed that the control cookies were not significantly different from cookies with the addition of batik clam shell flour, cookies with the addition of blood clam shell flour, and cookies with the addition of green mussel shell flour. While cookies with the addition of batik clam shell flour were significantly different from cookies with the addition of blood clam shell flour and cookies with the addition of green mussel shell flour. The addition of clam shell flour had a significant effect on the ash content of cookies. The addition of clam shell flour causes the color of the cookies to be darker. Descriptive organoleptic testing of cookies with the addition of clam shell flour did not have a significant effect on control cookies. Hedonic organoleptic testing of cookies with the addition of clam shell flour did not have a significant effect on the color, taste, aroma, and texture of cookie.&#x0D; Keywords: cookies, batik clam shell flour, blood clam shell flour, green mussel shell flour

Production of functional crackers based on non-conventional flours. Study of the physicochemical and sensory properties

Crackers are popular snacks that can include functional ingredients in order to make products of higher nutritional value. The effect of partial replacement of wheat flour with barley, grape seed, olive stone, lupin and chickpea flour (10–50%) on the physicochemical (texture, color, and moisture) and sensory aspects of crackers was studied. Texture remained unaffected from substitution of wheat flour in all cases except for high (30%) substitution with olive stone flour, which led to softer crackers (43% and 52% reductions in hardness and toughness, respectively). All levels of wheat substitution resulted to darker color of crackers (L* values declined between 1.4–60%). Overall, color was predominately affected by the level of flour used as well as flour type. Higher levels of substitution exerted a stronger impact. The sensorial perception of crackers was negatively affected by the addition of grape seed and olive stone flours, while it was positively affected by pulse flours. The results showed that functional flours can be utilized in cracker formulations as alternatives to wheat flour, however, sensory acceptability depends on flour type and level of substitution.

Use of natural yogurt, pineapple juice, and beer wort as starter cultures in sourdough combined with white and whole wheat flours to improve the technological characteristics of milk breads

The objective of this study was to investigate the combined effects of different types of wheat flour (whole or white) with natural yogurt, pineapple juice, and beer wort for sourdough production to improve the technological characteristics of milk breads. Seven milk breads were prepared with varying yeast fermentation and sourdough types (produced with different types of wheat flour and substrates). A physical analysis (oven jump, bread shape, crust thickness, expansion coefficient, and images of the slices), proximal composition examination (moisture, carbohydrates, proteins, lipids, and ash), and acceptability and purchase intent evaluation were then performed. The results showed that the factors under study influenced the technological characteristics of the milk breads, and that the sourdough consisting of whole wheat flour and yogurt was less acceptable. However, sourdough prepared using white wheat flour and beer wort was the most effective, being a promising alternative in the elaboration of milk breads.

ДОСЛІДЖЕННЯ ВЛАСТИВОСТЕЙ БАГАТОКОМПОНЕНТНИХ СУМІШЕЙ БОРОШНА

Flour is a component of many types of food products, such as bakery, pasta, confectionery, meat, fish emulsion products, sauces and low-calorie mayonnaise. The expansion of the range of flour products is accompanied by the introduction of flour blends into the recipe and their enrichment with useful nutrients. The article presents the results of research into the properties of various types of flour and their multicomponent mixtures. The indicator of moisture retention capacity was determined experimentally by the centrifugation method and calculated by the principle of additivity. It is possible to adjust this indicator by changing the number of individual components in mixtures containing different types of flour.The use of blends of flour in the recipes of food products ensures the expansion of their assortment and enrichment with useful nutrients. Bread, pasta, confectionery, meat and fish emulsion products, sauces and low-calorie mayonnaises containing flour are complex systems. Important and relevant for such systems is the study of the properties of the constituent components and the study of their influence on the quality of finished products.Inthe process of developing recipes for flour products and products that include different types of flour, it is necessary to take into account the indicators of both individual types of flour and their mixtures with different amounts of components inthe system. It is also important to study the possibility of adjusting the properties of flour compositions by changing the numberof individual components in their composition.Analysis of research and publications showed that considerable attention is paid tothe use of non-traditional flour raw materials in the production of food products. The conducted research mainly concerns the study of the properties of individual types of flour, which makes the urgent task of researching multicomponent mixtures of flour.The purpose of the article is to study the properties of both individual types of flour and their multicomponent mixtures, establish the possibility of regulating such an indicator as moisture-retaining capacity for blends, as well as the formation of multicomponent flour mixtures with specified parameters.In the work, indicators of the moisture-retaining capacity of various types of flour and their multicomponent mixtures are determined. Calculations of the moisture-retaining capacity of two-, three-, and four-component blends of flour were carried out according to the principle of additivity, taking into account the share of each component in the mixture. The results were obtained regarding the possibility of increasing the water-absorbing capacity of wheat flour by adding bran to it. The presented materials can be used to form blends of flour with the specified indicators of moisture retention capacity

Wideband Measurement of Dielectric Properties of Wheat Flour

Use of electromagnetic (EM) fields in the food industry for food inspection as well as sterilization and drying is increasing. To develop such applications, the knowledge of the dielectric properties of food is fundamental. In the literature, there is scarcity of data on dielectric properties of powdered foods, with reported values that are usually at specific frequencies only. This article reports the development of an experimental framework to characterize the dielectric properties of powdered food over a wide range of frequencies. The used methodologies include the open-ended coaxial probe technique and waveguide systems: the first being intrinsically a broadband technique but strongly dependent on the type of material being tested, and the latter being a medium- to narrowband technique allowing a better control of the tested material. The proposed framework is then used to measure the dielectric properties of several types of flour between 500 MHz and 20 GHz. The measured properties are then characterized in terms of density and interpolated with a Cole–Cole dispersive model. From the measured results, the suitability of the proposed setup was demonstrated. Additionally, it was verified that the permittivity of flour does not depend on the brand and can be expressed as a function of the density of the material, following a mixture formula already proposed in the literature. Moreover, the proposed Cole–Cole fit is able to represent the frequency behavior of the real part of permittivity of flour with differences within 3% from the measured data.