Effect of Compositional Variation of Gluten Proteins and Rheological Characteristics of Wheat Flour on the Textural Quality of White Salted Noodles

Breadmaking Quality Parameters of Different Varieties of Triticale Cultivars

The aim of this research is to investigate the quality of different triticale cultivars (Ingen 35, Ingen 33, Ingen 93, Ingen 54, Ingen 40, Fanica and Costel) cultivated in the Republic of Moldova from the point of view of the flour, dough, and bread quality characteristics. This research may be of great importance for producers and consumers due to the high production capacity, wide adaptability, economic significance in human foods and nutritional value of triticale cultivars. The triticale flours were analyzed for moisture, ash, protein, wet gluten, fat, carbohydrates, acidity and color parameters (L*, a* and b* values). According to the chemical values, the triticale flours were suitable for breadmaking. The moisture content was less than 14% for all triticale varieties, indicating a long shelf life during its storage and the lowest protein content of 13.1%. The mixing, pasting and fermentation characteristics of triticale dough were analyzed using Mixolab, falling number, dynamic rheometer, alveograph and rheofermentometer devices. All triticale flours presented high levels of α-amylase, with falling number values being less than 70 s. The bread quality characteristics analyzed were the loaf volume, porosity, acidity, and sensory characteristics, and the textural parameters examined were the hardness, gumminess, chewiness, cohesiveness, and resilience. Our data showed large differences in breadmaking quality parameters. However, according to the sensory data, all the bread samples except those obtained from the Costel variety were of a very good quality, being within a total sensory range of 25.26-29.85 points. According to the relationships between flour, dough and bread characteristics obtained through principal component analysis, it may be concluded that the triticale varieties Costel, Ingen 33, Ingen 93 and Fanica, and Ingen 35 were more closely associated with each other. Significant differences were found between the triticale variety samples Ingen 40, Fanica, and Ingen 35 and between Ingen 54, Ingen 33, Costel, and Ingen 93.

Effect of guar gum and egg addition on characteristics of noodle analog made from rice flour

Noodle analog is a non-gluten-based noodle. Noodle analog made from rice flour is known to have less desirable physical characteristics, such as a harder and less chewy texture. The addition of guar gum as a hydrocolloid and egg in this research was done to improve the rice-flour-based noodle analog characteristics. The aim of this research was to determine the best guar gum and egg concentration to enhance the noodle analog characteristics. The guar gum was added in several concentrations (1.5%, 2%, 2.5%, and 3% w/w), and raw fresh chicken egg was also added in different concentrations (3%, 5%, and 7% w/w). The best noodle analog was obtained with the addition of 3% guar gum and 5% raw fresh chicken egg. This formulation has the lowest adhesiveness value, high elongation, cohesiveness and springiness, with better cooking quality, such as low cooking loss and moderate water absorption. The best noodle analog was then compared to the commercial noodle. The noodle analog had a lower cooking loss, but the wheat flour-based commercial noodle still had better textural properties, such as softer, less adhesive, and springier texture. However, the noodle analog had better cohesiveness and higher tensile strength with a similar elongation compared to wheat flour-based commercial noodle.

The Effect of Freeze-Thaw Cycles on the Microscopic Properties of Dumpling Wrappers

Dumplings are a traditional Chinese food welcomed by Chinese people. Research has indicated that process of quick-frozen wheat cultivars and their gliadins are all related to the quality and shelf-life of dumplings. Therefore, the effect of freeze-thaw cycles on the textural properties and microscopic characteristics of two types of quick-frozen dumpling wrappers (Zhaomai and Wenmai 19) and conformation of their gliadins were investigated. Scanning electron microscopy showed that Wenmai 19 dumpling wrappers had apparent damage after the first cycle, but Zhaomai wrappers did not reveal significant changes until the fourth cycle. The particle size distribution in the starch granules of Wenmai 19 wrappers varied in terms of mechanical damage, but Zhaomai delayed or avoided such effects. FT-IR found a loose protein structure of the gliadins. Differential scanning calorimetry showed that gliadins of Wenmai 19 degenerated more than those of Zhaomai. The crosslinking of gliadin and glutenin maintained a high-quality gluten network, thus protecting the gliadin stability from ice crystals. In turn, the gliadin maintained the strength of the gluten network. Therefore, raw flours with high-quality protein networks are more suitable for frozen dumplings. Freeze-thaw cycles dramatically decreased the textural characteristics of dumpling wrappers and the microscopic characteristics of their gliadin proteins. Concerning wheat cultivars with weak gluten, flours with high-quality protein networks are more suitable as raw materials for frozen dumplings.

Effect of adding wheat (Triticum aestivum L.) farina with varied integrity of endosperm cell wall on dough characteristics, dried noodles quality and starch digestibility

The changes of intact endosperm cell wall in cereal food processing and its effect on starch digestibility are important for developing nutritious and healthy next generation foods, but their changes in the process of traditional Chinese cooking products such as noodles making have not been investigated. In this paper, the changes in endosperm cell wall in the process of making dried noodles by adding 60 % wheat farina with varied particle sizes were tracked, and the underlying mechanisms affecting the noodle quality and starch digestibility were revealed. With increasing particle size (150-800 μm) of farina, the contents of starch and protein, swelling index of glutenin, and sedimentation value decreased significantly and the dietary fiber increased sharply; moreover, water absorption, stability and extensibility of dough decline obviously while the resistance to extension and thermal stability were enhanced. In addition, noodles made with flour added larger-particle size farina had a lower hardness, springiness, and stretchability while a higher adhesiveness. Compared to the flour and other samples, the flour with the smaller-particle size farina (150-355 μm) showed better rheological properties of dough and cooking quality of noodles. Furthermore, the integrity of the endosperm cell wall increased with increasing particle size (150-800 μm), which was perfectly preserved during noodle processing and was an effective physical barrier to inhibit starch digestion. The starch digestibility of noodles made from mixed farina with low protein content (~15 %) did not significantly reduce compared to that of wheat flour noodles with high protein content (~18 %), probably due to the increased cell wall permeability of noodle processing, or the overwhelming effect of noodle structure or protein content. In conclusion, our findings will contribute to an innovative perspective for in-depth understanding of the impact of endosperm cell wall on the quality and nutrition of noodles at the cellular level, which provided a theoretical basis for the moderate processing of wheat flour and the development of healthier wheat-based food products.

Effect of Palm Oil-Carnauba Wax Oleogel That Processed with Ultrasonication on the Physicochemical Properties of Salted Duck Egg White Fortified Instant Noodles

The present study permutes edible palm oil (PO) into oleogel by incorporating carnauba wax (CW) at two different concentrations (5 g/100 g and 10 g/100 g, w/w) and processing using ultrasonication. The prepared oleogels (OG1: PO-CW (5 g/100 g); OG2: PO-CW (10 g/100 g); and OGU1: PO-CW (5 g/100 g) with ultrasonication, and OGU2: PO-CW (10 g/100 g) with ultrasonication) were compared with PO (control) to deep fry salted duck egg white (SDEW) fortified instant noodles. The impact of different frying mediums on the physicochemical properties of SDEW noodles was investigated. SDEW instant noodles that were fried using OGU and OG samples had a higher L* and b* but lower a* values than those that were fried in PO (p < 0.05). Among the oleogel-fried samples, noodles that were fried in OGU2 and OG2 effectively lowered the oil uptake and showed better cooking properties than OGU1- and OG1-fried noodles, respectively (p < 0.05). Textural attributes such as higher hardness, firmness, chewiness, tensile strength and elasticity, and lower stickiness were noticed in the samples that were fried in OGU, followed by OG and PO (p < 0.05). Scanning electron microstructure revealed a uniform and smoother surface of noodles fried in OGU and OG, whereas the PO-fried sample showed an uneven and rough surface with more bulges. Noodles were tested for fatty acid compositions, and the results found that oleogel-fried noodles retained more unsaturated fatty acids than the control (p < 0.05). During storage of the frying medium after frying the noodles, OGU and OG had higher oxidative stability with lower TBARS, PV, p-AnV, and Totox values than PO at room temperature for 12 days. Overall, using oleogel as frying media improved the physicochemical and nutritional properties of SDEW noodles. This finding could be beneficial for food industries to produce healthy fried food products for consumers.

Development of Gluten-Free Cupcakes Enriched with Almond, Flaxseed, and Chickpea Flours

Background. The mixing of cereals and legumes with nuts and seeds can produce various products that can be optimal for consumption with respect to their nutritional density. The use of legumes in gluten-free foods is becoming very prominent with increase in advancement in food engineering and technology. This study was aimed to develop a gluten-free product (cupcake) enriched with chick pea flour, almonds, and flaxseeds for celiac disease patients. Materials and Methods. The procured raw material including almonds, chickpea flour, and flaxseeds was mixed in appropriate amounts, and cupcakes were formulated following a specified recipe. The cupcakes were divided in five groups based on their recipe. First one was wheat based; 2nd one was corn and rice based; and next 3 were chickpea, almond, and flaxseed based, respectively. The cupcakes were checked for their proximate analysis parameters (carbohydrate, protein, and nitrogen-free extract), gluten and heavy metals (lead, chromium, and arsenic), bacterial load (E. coli, total coliforms, salmonella, yeast, and molds), fatty acid, texture parameters (firmness, cohesiveness, gumminess, and chewiness), and physical parameters (weight, height, volume, and specific volume). All these parameters were compared with wheat-based cupcakes to assess the product’s quality. Results. The volume of intervention cupcakes was a bit low compared to wheat/rice-based cupcakes but the specific volume was comparable. In texture analysis, firmness, gumminess, and chewiness were enhanced in intervention cupcakes compared to control but cohesiveness was comparable also. The carbohydrate contents were significantly lower in intervention cupcakes 22–30% compared to control cupcakes. Protein, fiber, and fat contents were significantly higher 11–14, 8–10, and 40%, respectively, with improvement (2-3 folds) in calcium, zinc, and iron contents in intervention cupcakes. All the safety parameters including heavy metals and bacterial and fungal load were found normal. The sensory attributes like size and color were found to be less acceptable but odor and taste were comparatively high in formulated products. Conclusion. The use of chickpeas, almonds, and flaxseeds in high concentration was first-time used to formulate a recipe of gluten-free cupcake. These cupcakes were more nutritious compared to available conventional recipes. Apparently, no health hazard was found in these cupcakes. Some sensory characteristics of cupcakes were slightly lower and comparable to wheat/rice-based cupcakes.

Effect of Resistant Starch Sources on the Physical Properties of Dough and on the Eating Quality and Glycemic Index of Salted Noodles

The aim of this study was to evaluate the characteristics and eating quality of salted noodles that are incorporated with different formulations of flour. Up to 20% of wheat flour was substituted by composite flours of highly resistant starches, including heat moisture treatment corn starch (HMT-CS), high-amylose corn starch (Hylon VII), and green banana flour (GBF). The physical properties of dough, in conjunction with the eating quality and estimated glycemic index (EGI) of cooked salted noodles, were investigated in this study. The results concluded that the incorporation of GBF, HMT, and Hylon VII not only affected the water absorption and mixing tolerance of the dough, but also the maximum resistance to extension and extensibility in terms of the extensographic properties. Meanwhile, GBF, HMT, and Hylon VII incorporation significantly increased the resistant starch content and decreased the fat content of the noodle samples. The textural profile analyses of cooked salted noodles indicated that hardness, gumminess, chewiness, and shearing force increased; nevertheless, springiness declined with the increase in the proportion of flours from 10 to 20%. The sensory evaluation detected that wheat flour composited with 10% GBF and HMT flours could produce acceptable quality noodles as compared with normal typical control noodles. In the meantime, salted noodles incorporated with GBF, HMT-CS, and Hylon VII flour decreased the estimated glycemic index (EGI) dramatically. The result of this study concluded that incorporation of various sources of resistant starch flour could develop a low-GI noodle with good acceptability that may contribute to gastrointestinal health.

Effects of Konjac glucomannan with different viscosities on the rheological and microstructural properties of dough and the performance of steamed bread

Konjac glucomannan (KGM) is used as an additive to improve the properties of wheat products. The effects of three types of KGM on the rheological properties and microstructure of dough, as well as the performance of steamed bread were investigated in this study. Particularly, dough with KGM displayed new features such as reduced peak viscosity, breakdown and setback. As the viscosity of KGM increased, the stability of the dough structure increased, while the viscosity and fluidity of the dough decreased. More interestingly, the gluten film of dough also increased with increasing substitution level and viscosity of KGM. Consistently, KGM with higher viscosity improved the quality of steamed bread. Generally, three types of KGM have different effects on the rheological characteristics and microstructure of dough, as well as the performance of steamed bread, which provide useful information for the proper application of KGM in wheat-based foods.

Effect of physicochemical and rheological properties of flour from different local wheat varieties on the quality of varanphal: an Indian traditional product

Varanphal is an Indian traditional product which is similar to pasta. The suitability of four local varieties of wheat flour (Lokwan, Sharbati, MP cross S.H.R. and MP Lokwan) was determined by evaluating their physicochemical and rheological properties. The rheological properties such as farinographic characteristics, dough hardness, stickiness, and spreadability of dough were also evaluated for the same. Flour and dough properties of wheat varieties were correlated with varanphal quality characteristics. The correlation coefficient data indicated that amongst the physicochemical properties of flour such as protein, dry gluten, and damaged starch content were the indices in predicting the varanphal quality. The rheological properties such as farinograph water absorption, dough stability, hardness and spreadability were found to be highly correlated with varanphal quality. The strong relationship were observed between dry gluten content with spreadability, L* value flour with dough stickiness, dough hardness with protein content, dough hardness with overall acceptibility and cohesiveness of dough with the cohesiveness of varnaphal.

Evaluation of molecular weight distribution of unreduced wheat gluten proteins associated with noodle quality

Unreduced gluten proteins of Indian wheat varieties viz.C306, DBW16, HI977 and HW2004 were separated using size-exclusion chromatography (SEC). Statistical correlation of area % of eluted peaks with properties of flour, dough and noodles was elucidated. Chromatograms of gluten proteins were classified primarily into five peaks in decreasing molecular size range and relative proportion were expressed in terms of area % of individual peaks which depicts the quantitative variation in protein eluted at different retention times. Cooking time and cooked weight of noodles depicted positive correlation with peak I and negative correlation with peak II which predominantly composed of glutenins and gliadins, respectively. Oil uptake and cooking loss were negatively association with peak I and positively with peak II. Noodle hardness, springiness, cohesiveness and chewiness were positively correlated with peak I and negatively to peak II, though adhesiveness was unaffected by SEC eluted peaks statistically.