Quality Characteristics Of Flour Research Articles

Sprouting days: Its influence on quality characteristics of millet and sorghum flour

Sorghum and millet are among the most important cereal crops consumed worldwide, with production concentrated in many developing countries in Africa and Asia. Malting is a traditional cheap method adopted to improve sorghum and millet utilization in agribusiness and various households. This study determined the impact of sprouting duration on the quality characteristics of flours from sorghum and millet. The proximate, physicochemical and functional properties were observed in raw (0 day) and malted flours (2, 4, and 6 days). From the results, physicochemical properties generally increased (pH (4.79–6.17), TSS (1.40–5.16 oBrix), and TA (1.02–1.99 %)) with sprouting period for both millet and sorghum flours. Also, whilst proximate parameters such as ash (1.05–2.55 %), fat (1.69–10.55 %), and energy content (377.58–412.18 kcal) of malted millet and sorghum followed an increasing trend, fiber (1.98–1.68 %) and carbohydrate (89.10–78.67 %) decreased with increasing sprouting days. Again, with the exception of water holding capacity (1.75–2.33 %) which increased with the increase in sprouting days, all other functional properties (bulk density (0.59–0.54 g/ml), loose density (0.56–0.45 g/ml), oil holding capacity (2.50–1.45 %), and swelling index (1.07–1.02 %) declined in the malted millet flour. In the case of malted sorghum, bulk (0.64–0.59 g/ml) and loose (0.57–0.50 g/ml) densities observed a general decline while all other functional properties (water holding capacity, oil holding capacity, and swelling index of sorghum flour) revealed no obvious trend with sprouting days. This study revealed that sprouting duration has a significant impact on the quality parameters of both sorghum and millet flours. It is therefore important to explore such sprouted grain flours for possible incorporation in breakfast cereals, infant foods, and bakery products.

Quality and nutritional attributes of whole einkorn flour and its suitability for fresh noodle production compared to whole wheat flour

AbstractBackground and ObjectivesThis study investigated the physicochemical properties, particle size, pasting properties, phenolic acids, carotenoid content, and fresh noodle quality characteristics of whole einkorn flour (WEF) in comparison with whole wheat flour (WWF). Three WEF samples from different cultivation regions in Turkey were analyzed.FindingsThe WEFs exhibited significant variations in all quality characteristics compared to WWF, influenced by different einkorn growing environments. Phenolic acid and carotenoid contents, along with antioxidant activity, were highest in WEF1 and WEF2, highlighting their potential nutritional benefits. Noodles made from WEF3 demonstrated quality equivalent to that of WWF, although their protein content and nutritional value were relatively lower than those of WEF1 and WEF2.ConclusionsThis research demonstrates the potential of WEF for fresh noodle production with quality comparable to WWF. The nutritional value varies by cultivation area, emphasizing the importance of selecting appropriate cultivars and growing conditions for optimal results.Significance and NoveltyThis study highlights, for the first time, the nutritional value and quality characteristics of WEF influenced by growing areas, impacting its suitability, equivalent to WWF, for producing fresh noodles.

Effects of quinoa flour (Chenopodium Quinoa Willd) substitution on wheat flour characteristics

Quinoa is a pseudo-cereal with great nutritional and functional qualities, serving as an excellent substitution to develop quinoa-containing foods. This study aimed to explore the influence of quinoa flour substitution on quality characteristics of wheat flour (WF). WF was substituted with different level of quinoa core flour, ground quinoa whole flour and recombined quinoa whole flour. Increasing levels of quinoa flour in WF declined dough swelling index, while increased falling number of composite flours. Besides, quinoa flour substitution considerably decreased the chemical forces of gluten in composite flours. The proportions α-helix and β-sheets reduced, while the random coil proportion increased in gluten secondary structure. SEM images revealed that the gluten network structure was severely damaged. Our findings indicated that substitution of WF with quinoa flours was promising to be developed as an ingredient for food products.

Relationship between wheat flour’s quality characteristics and color of fresh wet noodles

ABSTRACT Thirty-four wheat cultivars were used to study the relationship between wheat flour quality and fresh wet noodle (FWN) color when stored at room temperature (25°C) over a 24 h period by the partial least squares regression (PLSR) method. Results showed that quality characteristics of wheat flour and their coefficients of variation differed greatly, and the samples were very representative. During FWN storage, the a* value varied greatly, the L* value decreased, and the b* value increased. The results of the correlation analysis showed that the color of wheat flour had significant correlation with FWN (p <0.05), and FWN color at 0 h had significant correlation with FWN color changes during 24 h storage (p <0.05). Protein, wet gluten, dry gluten, ash content, PPO activity, and water absorption (WA) of wheat flour had significantly negative effects on the L* value of FWN (p <0.05). Peak viscosity (PV), trough viscosity (TV), and breakdown viscosity (BV) of the pasting properties of wheat flour contributed greatly to the L* value (p <0.05), but had significantly negative effects on the a* value (p <0.05). The results showed that quality characteristics of wheat flour profoundly affected FWN color changes during storage, and color, dough strength and pasting properties of wheat flour should be considered comprehensively when selecting the wheat variety for FWN.

The effect of hydroxypropyl starch on the improvement of mechanical and cooking properties of rice noodles

The convenient preparation of rice noodles with excellent mechanical and cooking properties remains a challenge for the food industry. The purpose of this study was to investigate the effect of different hydroxypropyl starch additions on the quality, performance, and structural characteristics of rice flours and noodles by mechanical property testing, cooking characteristic analysis, differential scanning calorimetry (DSC), X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), low-field nuclear magnetic resonance (LF-NMR), and other methods. SEM evaluation revealed that the addition of hydroxypropyl starch created rice noodles with a denser network structure. XRD analysis indicated a decrease in the noodle crystallinity from 11.37 % (control noodles) to 3.94 % (noodles containing 10 % hydroxypropyl starch). LF-NMR characterization confirmed an enhanced water-holding capacity of noodles containing hydroxypropyl starch. The noodle tensile strain increased from 54.97 ± 0.45 % in control noodles to 100.63 ± 1.58 % in noodles containing 3 % hydroxypropyl starch. The cooking loss of dried noodles decreased from 8.30 ± 0.57 % (control noodles) to 5.67 ± 0.16 % (noodles containing 3 % hydroxypropyl starch), and the broken rates were reduced from 77.50 ± 1.54 % of the control noodles to 12.50 ± 1.54 % of the noodles containing 3 % hydroxypropyl starch. The addition of 3 % hydroxypropyl starch can improve the quality of rice noodles and promote the development of the rice industry.

Analysis of Correlations between Quality Characteristics of Wheat Flour and Edible Quality of Crusts from Deep-fried and Battered Pork Slices

Analysis of Correlations between Quality Characteristics of Wheat Flour and Edible Quality of Crusts from Deep-fried and Battered Pork Slices

통밀빵 제조에 적합한 통밀가루 품질지표 규명

Purpose: This study was to identify the major quality parameters of whole wheat flour suitable for making whole wheat bread. Methods: The commercial twelve whole wheat flour samples were analyzed for physicochemical characteristics and bread-baking performance. Results: The tested samples showed a wide range of ash contents, water, sodium carbonate solvent retention capacity (SRC), sodium dodecyl sulfate (SDS)-sedimentation volumes, particle sizes, and colors. The bread-making performance of the flours also showed significant variations in crumb colors, dough heights, bread heights, and bread volumes. The correlation and principal component analyses of the quality characteristics of whole wheat flour and whole wheat bread showed that the dough height and the bread height and volume correlated negatively with the ash content and water SRC but positively with the SDS sedimentation of the whole wheat flour. However, the firmness of the bread showed the opposite relationship. Conclusion: In conclusion, the ash content, water SRC, and SDS sedimentation volume of the whole wheat flour can be used as valuable indicators to predict the quality of the whole wheat bread.

Correlation of the quality attributes of fufu flour and the sensory and instrumental texture profiles of the cooked dough produced from different cassava varieties

ABSTRACT There is little or no information on the relationship between the quality of fufu flour and the textural attributes of cooked dough. Quality attributes of flour were therefore correlated with the sensory texture profile analysis (STPA) and instrumental texture profile analysis (ITPA) of the dough produced from six varieties of cassava. Results showed that the water absorption capacity (WAC) of flour had a positive correlation (p < .05, r = 0.90) with the STPA moldability of the cooked dough and a significant negative correlation (p < 0 .05, r = −0.94) with its STPA. The correlation between the STPA hardness of cooked dough and the bulk density of flour was positive and significant (p < .01, r = 0.94) but not significant between the ITPA of cooked dough and the quality attributes of flour. The textural attributes of the eba produced from the TMEB419 variety were hardness and moldability, those for TMS13F1020P0001 were stretchability, gumminess, hardness, and adhesiveness, and those for NR14B-218, TMS13F1153P0001, NR1741, and IITA-TMS-IBA30572 were moldability and stretchability. The information provided in this study might help in the breeding of cassava varieties that would be acceptable to end-users in terms of the quality characteristics of flour and the textural attributes of cooked dough.

Effect of Pretreatments and Drying Methods on Physical and Microstructural Properties of Potato Flour.

This study evaluated the effects of pretreatments (blanching (60 and 95 °C) and boiling) and drying methods (freeze-drying and oven drying) on the quality characteristics of potato flour derived from three potato varieties, namely, Shangi, Unica, and Dutch Robjin. The percentage flour yield, color, particle size distribution, flow characteristics, microstructural and functional properties of the potato flour were determined. Unica recorded the least peeling loss, while the Dutch Robjin variety had the highest. Color parameters were significantly affected (p < 0.05) by the pretreatments and drying methods. Freeze drying produced lighter potato flour (L* = 92.86) compared to the other methods. Boiling and blanching at 95 °C followed by oven drying recorded a low angle of repose and compressibility index, indicating better flow characteristics. The smallest particle size (56.5 µm) was recorded for the freeze-drying treatment, while boiling followed by oven drying had the largest particle size (307.5 µm). Microstructural results indicate that boiling and blanching at 95 °C, followed by oven drying resulted in damaged starch granules, while freeze-drying and low-temperature blanching (60 °C) maintained the native starch granule. Particle size and the solubility index of potato flour showed strong positive correlation. This study revealed that the pretreatments and drying methods affected potato flour’s physical and microstructural parameters differently, resulting in changes in their functionality.

The Effects of Storage Time and Environmental Storage Conditions on Flour Quality, Dough Rheology, and Biscuit Characteristics: The Case Study of a Traditional Italian Biscuit (Biscotto di Prato).

Many types of baked goods are firmly rooted in the food habits of many people in different countries. Although there have been great strides in improving milling, kneading, and baking, given the lack of essential studies, further steps forward need to be taken to understand the effects of storage time and environmental storage conditions, thus motivating this work. The aim of this study is to assess the effects of storage time, using one-way ANOVA, and environmental storage conditions (environmental temperature and humidity), using MOLS analysis, on flour composition, dough rheology, and biscuit characteristics. Seven levels of storage time were tested: T0 (control), T1, T2, T3, T4, T5, and T6. The results showed that flour storage time significantly increased dough tenacity (P) and curve configuration ratio (P/L), and decreased the biscuit volume (best at T0). However, 2–3 weeks of storage highlighted a significant increase in deformation energy (W), an essential alveograph parameter that is closely correlated to the technological success of leavened products. This optimum found for W might be considered as a great stride in understanding the effects of storage time, confirming that wheat flour can reach its optimal performance after two-three weeks of storage, in particular for W. Moreover, this information could be useful, not only for biscuits production, but also for bread and bakery products (and, thus, the entire bakery industry). MOLS analysis highlighted that dough rheology and biscuit characteristics are mainly affected by flour composition (primarily from starch content) rather than environmental storage parameters. In conclusion, to optimize the biscuit characteristics, it is necessary to use flours with a low content of damaged starch by selecting the most suitable milling technique and carefully managing the operative parameters.

Influence of Tempering Methods on Waxy White Sorghum Kernel, Milling, and Flour Properties

Highlights Tempering moisture content and condition had a significant impact on waxy white sorghum kernel and flour properties. Physical sorghum kernel properties after tempering varies with efficiency of moisture penetration into kernels. Steam tempering for 15 s led to better physical kernel properties for handling, transportation, and processing. Room temperature water tempering (18%, 24 h) yielded better flour yield and protein content. Abstract. To optimize the yield and quality of waxy white sorghum flour, the effects of various tempering treatments on sorghum kernel physical properties, milling performance, and flour properties were evaluated. Waxy white sorghum kernels were tempered at different moisture levels and for different times using either room temperature water, hot water, or steam. Tempered sorghum kernels were milled into flour using a milling flowsheet developed for a laboratory-scale tabletop roller mill that consists of four break rolls and eight reduction rolls. The effects of these tempering methods on waxy white sorghum kernel properties, roller milling, and flour properties were investigated. Tempering moisture content and condition had a significant impact on the waxy white sorghum kernel’s physical and flour properties. Steam tempering for 15s led to desirable physical kernel properties that would positively impact handling, transportation, and processing: lower bulk (732.53 kg/m3), tapped (769.39 kg/m3), and true densities (1313.37 kg/m3); lower hardness index (65.01); higher abrasive hardness index (AHI) (23.73); higher angle of repose (23.60); and higher coefficients of static (0.35) and rolling friction (0.29). In terms of milling, room temperature water tempering at 18% w.b. moisture level for 24 h resulted in better bran-endosperm separation without compensating for important flour quality characteristics. It exhibited higher protein content (9.72%), low ash content (0.94%), high bran extraction (6.42%), and high brightness (80.67). Room temperature water tempering at 18% w.b. for 24 h is a more suitable pretreatment prior to the milling of waxy white sorghum kernels in terms of flour yield and quality. Keywords: Flour properties, Kernel properties, Roller milling, Tempering, Waxy white sorghum.

Non-GMO 고아밀로스 밀가루의 전분관련 특성 연구

Purpose: This study aimed to assess the effects of the amylose content of wheat on flour quality characteristics with a focus on starch-related properties. Methods: Three varieties of wheat flour (W, N, and H flour) milled from waxy, normal, and non-GMO high amylose wheat, respectively, were used for analyzing the amylose and total starch contents, pasting and gelatinization properties using rapid visco analyzer and differential scanning calorimetry, and the crystallinity using an X-ray diffractometer. In addition, the in vitro starch digestibility of the flour samples was measured. Results: Compared to the N and W flour, the pasting viscosity of the H flour little increased by suppressed swelling of starch granules. H flour gelatinized at a higher temperature with a smaller enthalpy than the N and W flour. The crystallinity pattern in H flour was observed as B-type, compared to the N and W flours as A-types. The rapidly digestible starch and slowly digestible starch contents of the H flour were significantly lower than those of the N and W flour, but the resistant starch content was significantly higher. Conclusions: Overall results confirmed that the H flour could be successfully used as an ingredient for resistant starch. Besides, H flour can be used without dilution of gluten in bread or noodle making, which would be advantageous compared to commercially available resistant starch ingredients.

Biochemical properties, nutritional quality, colour profile and techno‐functional properties of whole grain sourdough and malted cowpea and quinoa flours

AbstractThe particular interest in biomodifications of underutilised but nutritionally distinct whole grains is vital to promote diet diversity, nutrition transition and food security. This study investigated the use of short‐term solid‐state fermentation and germination to ease processability and improve the quality characteristics of whole grain (WG) cowpea and quinoa flours. The fermented and germinated WG flours were prepared at 28 °C for 48 h. The biochemical, nutritional quality and techno‐functional properties of the obtained flours were determined. The macromolecules’ biomodification by microbial metabolism and endogenous enzymes activation influenced quality variations in the biomodified flours. The cowpea sourdough flour (CSF) presented lower acidity (pH 4.72), higher total flavonoid (29.63 mg QE/g), total phenolic (8.21 mg GAE/g) and antioxidant activity. The flour also showed high contents of fibre (5.30%), ash (4.42%), calcium (864.49 mg/kg), potassium (12848.64 mg/kg), zinc (33.83 mg/kg), good protein (21.43%) and a moderate fat level (2.65%). Higher oil absorption and water solubility indices were also noted for CSF. In contrast, malted quinoa flour (MQF) exhibited higher swelling power, increased dispersibility and improved final, peak and trough viscosities. The CSF displayed higher redness and browning index, whereas MQF had greater lightness. The results suggest that CSF and MQF had the best complementary quality attributes. Their formulation as gluten‐free, whole and multigrain ingredients may promote healthy choices for individualised growing dietary needs.

Effect of Gaseous Chlorine Dioxide Treatment on the Quality Characteristics of Buckwheat-Based Composite Flour and Storage Stability of Fresh Noodles

In this study, the effects of gaseous chlorine dioxide treatment on the physicochemical properties of buckwheat-based composited flour (buckwheat-wheat-gluten) and shelf-life of fresh buckwheat noodles (FBNs), as well as the textural qualities and sensory properties of noodles were investigated. Chlorine dioxide treatment significantly reduced the total plate count (TPC) and the total flavonoids content in the mixed flour (p &lt; 0.05), but the whiteness, development time and stability time were all increased. During storage, the microbial growth and darkening rate of FBNs made from chlorine dioxide treated buckwheat-based composite flour (CDBF) were delayed significantly, slowing the deterioration and improving storage stability of buckwheat noodles. In addition, chlorine dioxide treatment had no apparent adverse effect on the cooking loss and sensory characteristics during noodle storage. This finding would provide a new concept for the production of “low bacterial buckwheat-based flour” and have important consequences for the application of gaseous chlorine dioxide in food industry.

Effect of Tempering Conditions on White Sorghum Milling, Flour, and Bread Properties.

The effects of room temperature water, hot water, and steam tempering methods were investigated on sorghum kernel physical properties, milling, flour, and bread-making properties. Overall tempering condition and tempering moisture content were found to have a significant effect on the physical properties. Milling properties were evaluated using a laboratory-scale roller milling flowsheet consisting of four break rolls and eight reduction rolls. Room temperature tempering (18% moisture for 24 h) led to better separation of bran and endosperm without negatively impacting flour quality characteristics i.e., particle size distribution, flour yield, protein, ash, damaged starch, and moisture content. Bread produced from the flour obtained from milling sorghum kernels tempered with room temperature water (18% m.c for 24 h) and hot water (16% m.c at 60 °C for 18 h) displayed better bread-making properties i.e., high firmness, resilience, volume index, higher number of cells, and thinner cell walls when compared to other tempering conditions. Room temperature water tempering treatment (18% m.c for 24 h) could be a better pretreatment process for milling white sorghum kernels without negatively impacting the flour and bread-making quality characteristics.

Fishbone Flour (Definition, Analysis of Quality Characteristics, Manufacture): A Review

Fish bones are the largest contributor of waste from the fish processing industry which has not been used optimally. Fish bones have a high calcium content so they can be used as raw material for fish bone flour. This article aims to explain the use of fish bone into fish bone flour, how to process it, and the quality of fish bone flour by physicochemical testing. Fish bone flour can be obtained by extraction using water, alkaline solution and acid solution. The quality characteristics of bone flour can be seen from the water content, ash content, protein content and fat content. Based on several studies, the drying time and temperature affect the physicochemical characteristics of the resulting product.

Comparison of Particle Size and Quality Characteristics of Commercial Whole Wheat Flours Made from Korean Domestic Wheat and Foreign Wheat

Comparison of Particle Size and Quality Characteristics of Commercial Whole Wheat Flours Made from Korean Domestic Wheat and Foreign Wheat

The Influence of Supercritical Carbon Dioxide on Graham Flour Enzyme Polyphenol Oxidase Activity.

Graham flour is a form of whole wheat flour made by grinding the endosperm and is thus also the most nutritious. Generally, the enzyme polyphenol oxidase (PPO) catalyzes two different reactions in the presence of molecular oxygen: the hydroxylation of monophenols to ortho-diphenol and the oxidation of o-diphenol to o-quinone. The purpose of the work was to inactivate PPO activity to extend the shelf life of graham flour and at the same time preserve all the of its high-quality properties. The influence of supercritical CO2 (scCO2) treatment on PPO activity in graham flour was investigated. First, graham flour was exposed to scCO2 conditions, then the proteins were extracted, and in the last step the concentration of total proteins and the specific activity of the PPO enzyme were determined by spectrophotometric assay. PPO activity decreased with an increase in treatment pressure. Furthermore, the flour quality characteristics that meet all needs for wheat end-use products after scCO2 treatment have been preserved. No major changes in the structure of the granulate or shape of the flour particles were observed. A slightly reduced value of the moisture content in scCO2-treated graham flour also implies an extension of the shelf life.

Application of pulverization and thermal treatment to pigmented broken rice: insight into flour physical, functional and product forming properties.

The utilization of rice for food purposes involves pulverization and thermal processing which may affect its quality characteristics. Hence pigmented broken rice was processed in plate mill and hammer mill followed by thermal treatment by toasting to study the physical, and functional characteristics and their effect on rice noodle quality. Results showed that plate milled rice flour showed high concentration of particles with size below 148µm particle (44%), increased redness (21%), bulk density (17%), sedimentation value (75%), damaged starch (72%), peak viscosity (17%), and caused microstructural changes compared to the hammer mill. The toasting of plate milled red and black rice flour caused an insignificant influence on particle size, color, and bulk density. However, it increased the sedimentation value to 134% and 94% and damaged starch by 44% and 19% in red and black rice flour respectively. Further, a reduction in peak viscosity (22%) in red, and increase (16%) in black, along with microstructural changes were also observed. The rice noodle prepared using plate milled, and toasted red rice flour was sensorily acceptable and exhibited excellent textural properties. The study showed that plate milling and thermal treatment significantly affect the quality characteristics of pigmented rice flour and end-product quality.

Physico-Functional Properties, Nutritional Quality, and Sensory Characteristics of Pumpkin Peel Puree Fortified Biscuit

Functional properties, nutritional quality, and sensory characteristics of wheat flour/ pumpkin peel puree (PPP) based biscuits were investigated. Wheat flour and PPP were mixed in the ratio of 100:0 (control), 90:10, 80:20, 70:30 and 60:40 (weight/weight). Developed biscuits with PPP showed reduced lightness with increased yellowness and redness than control. The increase in PPP incorporation level increased water solubility index and decreased water absorption index and oil absorption index of biscuits. Spread ratio and density of biscuits increased slightly by increasing the PPP incorporation level. The crude fibre, minerals, β-carotene, and vitamin C contents of developed biscuits increased significantly (P < 0.05) by increasing the PPP incorporation level. The formula contained 80:20 wheat flour and PPP, respectively, revealed the highest sensory scores among all tested samples. The biscuit made from this formula contained 6.14% moisture, 15.05% fat, 8.91% protein, 1.74% total ash, 1.84% crude fibre, 66.32% carbohydrate, 7.13 mg/100g β-carotene, 2.26 mg/100g Vitamin C, 2.94 mg/100g iron, and energy value of 436.37 Kcal/100g dry matter.