Search Results (83)

With climate change, maintaining wheat quality has become essential for the functional properties, end-use, commodity value, and nutritional benefits of wheat flour. Temperature indirectly influences wheat quality by modulating grain size, starch and protein content, and the balance between these components. This review systematically analyzes temperature-mediated alterations in wheat grain quality, with particular emphasis on the two core components: starch and protein. Specifically, daytime warming generally increases protein content while reducing starch accumulation; however, temperatures exceeding 30 °C diminish key protein quality parameters (UPP%, Glu/Gli ratio, HMW-GS/LMW-GS ratio). Nighttime warming enhances protein quality but compromises starch content and yield potential. Conversely, under low-temperature conditions, starch content declines, whereas protein content is primarily influenced by genotypes and treated temperatures. Furthermore, the underlying mechanisms driving temperature-induced changes in wheat quality traits are discussed. However, the mechanisms of temperature effects have not been fully elucidated, and the results often vary between regions or over years. Thus, identifying conserved high/low-temperature resistance genes, QTLs, epialleles, and epiQTL, as well as developing corresponding molecular markers and epi-markers, is an urgent priority. Meanwhile, genome-editing tools such as CRISPR/Cas could serve as a powerful approach for creating new wheat germplasm with durable high/low-temperature resistance. Full article

High-amylose wheat (HAW), developed through non-genetic modification, addresses the growing demand for clean-label and nutritionally enhanced food products. This study systematically investigated the effects of heat-moisture treatment (HMT; 20% and 25% moisture levels) on the physicochemical properties and cookie-making performance of HAW flour (HAWF) and soft wheat flour (SWF). HMT promoted moisture-induced agglomeration, leading to increased particle size, reduced damaged starch content, and enhanced water and sucrose solvent retention capacities. Although the amylose content remained largely unchanged, pasting behavior was differentially affected, with increased viscosities in SWF and slight decreases in HAWF. Thermal analyses demonstrated elevated gelatinization temperatures, indicating improved thermal stability, while X-ray diffraction revealed alterations in starch crystallinity. Furthermore, HMT weakened gluten strength and modified dough rheology, effects more pronounced in HAWF. Cookies prepared from HMT-treated flours exhibited larger diameters, greater spread ratios, and reduced heights. In vitro digestibility assays showed a marked reduction in rapidly digestible starch and increases in slowly digestible and resistant starch fractions, particularly in HAWF cookies. Collectively, these findings establish HMT as an effective strategy for modulating flour functionality and enhancing cookie quality, while concurrently improving the nutritional profile through the alteration of starch digestibility characteristics. Full article

Starch is one of the leading nutritional carbohydrates in the human diet; its characteristics, such as digestion rate, depend on molecular structure, and in particular, the molecular composition, type and length of amylopectin chains, which are known to present a parabolic behavior with respect to digestion rate. Amylopectin with a higher density of small branches (Chains A) and those abundant in long chains (B2/B3) often present a marked resistance to digestion and could be a challenge in bread production since both fermentation and digestion could be further modulated in the presence of hydrocolloids or gluten. The objective of this work was to analyze different mixtures of starches (rice, potato, and corn) with hydrocolloids (guar and xanthan gum) and vital gluten to understand the relationship between chain length and molecular characteristics with respect to speed of digestion and glycemic index, and their incorporation into a bread loaf at 50 and 100% wheat flour substitution. A Plackett–Burman design was used to design the mixtures. Mixtures were characterized in terms of amylose/amylopectin content, fast, slow, and resistant (SDS, RS) starch digestion fractions, in vitro glycemic index, molecular weight (Mw), radius of gyration (Rz) of amylopectin, chain length distribution, and textural analysis. In the bread, a tendency to increase the SDS was observed when the mixtures included rice or potato, which can be related to the relationship between Mw and size and the prevalence of B2 and B3 chains. The Rz and RS content were related to average chain size and amylose content. The use of vital gluten was a determinant in achieving volume and textural characteristics in the final products and significantly affected the proportions of SDS and RS. By combining the molecular characteristics of starch with hydrocolloids, we can obtain food ingredients for specific applications, such as gluten-free products. Full article

Starch-lipid-protein ternary complexes have attracted more attention, and physical processing is gradually being applied to their preparation. This study was to understand the effect of atmospheric cold plasma (ACP) pretreatment times (1–4 min) and protein types (whey protein isolate (WPI), soy protein isolate (SPI), and egg white protein isolate (EWP)) on the wheat starch (WS)-lauric acid (LA)-protein ternary complexes. Experimental results indicated that one-minute ACP pretreatment of WS led to the increase in the amylose content to 30.02%, which produced the largest number of WS-LA-protein complexes (CI value of 69.21%, 67.41%, and 62.81% for WS-LA-WPI, WS-LA-SPI, and WS-LA-EWP complexes, respectively), resulting in the most ordered structure and higher enthalpy change. In vitro digestibility results based on starch showed that WS1-LA-protein complexes exhibited the lowest digestibility with the highest resistant starch content of 28.09%, 27.93%, and 27.41% for these three kinds of complexes, respectively. However, when the treatment time for WS was more than 1 min, a downward trend occurred, indicating that ACP pretreatment of WS for 1 min was the most beneficial for forming complexes. PCA results also verified that ACP pretreatment of WS for different times could significantly impact the generation and structure of ternary complexes. Moreover, protein types also affected the formation and physicochemical properties of ternary complexes. Notably, WPI, with the higher emulsifying property, formed a larger number (CI value of 69.21%), more ordered structure (Xv of 10.56%), and higher thermal stability of ternary complexes than SPI and EWP. This study presents a burgeoning technology to regulate the generation, structure, and functional properties of starch-lipid-protein complexes. Full article

The objective of this study is to investigate the digestion and metabolism characteristics of amino acids and glucose in energy and protein feeds, and to establish regression equations to accurately predict their release rates in vivo based on the in vitro digestion characteristics of the feedstuffs. A total of 9 energy feedstuffs and 19 protein feedstuffs were selected for in vitro digestion simulation experiments. Additionally, four representative energy and protein feeds were then chosen for the portal vein, femoral artery, and femoral vein blood cannulation experiments in growing pigs. The results showed that among the nine energy feedstuffs tested, wheat bran presented the highest degree of digestion, followed by wheat, whereas potato had the lowest degree of digestion. The digestibility of starch at different time points in vitro was linearly correlated with the crude fiber content, total starch content, and ratio of amylose to amylopectin (R² = 0.61~0.96). Among the 19 protein feedstuffs tested, peas released the highest total amount of amino acids, followed by sugar beet meal. The in vivo digestibility and metabolism trial in cannulated pigs showed that the total amino acid release was linearly correlated with the in vitro amino acid release rates, dry matter, crude protein, neutral detergent fiber, crude fat, and total energy of the feedstuffs (R² = 0.93~0.99). Full article

This study elucidated the mechanistic interplay between the extrusion parameters (temperature and screw speed), starch molecular architecture (chain-length distribution), and key physicochemical properties of wheat flour extrudates. Four wheat flours with varied amylose contents were extruded, where the average hydrodynamic radius ($\stackrel{\mathrm{-}}{R_h}$) was reduced by 75.5% in normal wheat (e.g., CM55), while waxy wheat (WW) exhibited higher $\stackrel{\mathrm{-}}{R_h}$. Crispness correlated negatively with long amylopectin branches (36 < X ≤ 100), with WW displaying superior crispness (12.22 N/mm). Short amylopectin chains (X 6–36) increased under thermomechanical stress, enhancing the expansion index (SEI), whereas long chains (X > 100) restricted expansion. Temperature may modulate color difference (ΔE) via Maillard reactions, while higher specific mechanical energy (SME) intensified browning. Higher temperatures (>170 °C), rather than SME, caused significant changes in the proportion of short branches and long branches, with SME exhibiting a negative correlation with $\stackrel{\mathrm{-}}{R_h}$, indicative of substantial molecular degradation. The starch chain-length distribution, rather than amylose content alone, dictates extrudate functionality. Full article

Background: Edible insects, such as Tenebrio molitor larvae (TM), offer a sustainable protein alternative to meet increasing dietary demands. The aim of this study is to investigate the functionalization of durum wheat pasta through the incorporation of TM flour (0–30%), focusing on how the addition of this non-conventional ingredient affects pasta production processing and its technological and chemical characteristics. Methods: Pasting properties, color, total phenolic content, antioxidant activity, and reducing sugars were determined for dry and cooked pasta. Texture profile and cooking properties were assessed for cooked samples. Results: The insect flour contributed to enhance polyphenols content in pasta, which increased from 0.06 and 0.03 mg_GAE/g up to 0.19 and 0.10 mg_GAE/g for dry and cooked pasta, respectively, and remained constant after the production process. The addition of TM flour altered the microstructure of wheat macromolecules, forming complex molecules, such as amylose–lipid complexes, and hydrogen and electrostatic interactions between proteins and polysaccharides, contributing to improved molecular stability and bioactivity. The pasta produced with insect flour up to 10% showed water absorption capacity, cooking properties, and consistency comparable to those of traditional pasta. Moreover, the addition of TM flour led to a reduction in peak viscosities from 2146.5 cP to 911.5 cP and roughness of pasta. Conclusions: The findings demonstrated the potential of TM flour as a unique source of bioactive compounds enhancing both the nutritional and functional properties of durum wheat pasta. Overcoming processing challenges through the optimization of product formulation and process parameters is crucial for exploring the production of insect flour enriched pasta at industrial scale while maintaining product uniformity and satisfying consumers expectations. Full article

In this study, the effect of waterlogging stress at the stem elongation stage on the wheat grain yield, grain traits, and quality of Chinese southern-type steamed bread was investigated in a field experiment using three winter wheat varieties (Aikang 58, Yannong 19, and Huaimai 44). Waterlogging stress significantly (p < 0.001) decreased the grain yields of the three wheat varieties, and Aikang 58 was the most tolerant variety, achieving a 90.8% yield compared with that of the control (normal irrigation). A grain component analysis showed that waterlogging significantly (p < 0.05) decreased the ratios of glutenin to gliadin and amylopectin to amylose in wheat grain. A Mixolab analysis showed that waterlogging significantly (p < 0.05) decreased the dough development time; stability; and C2, C3, C4, and C5 values of the three wheat varieties. A steamed bread-making test showed that steamed bread made from Aikang 58 under waterlogging conditions showed a lighter color, a higher specific volume, and a lower hardness than that made from Yannong 19 and Huaimai 44 under waterlogging conditions. Overall, waterlogging showed different effects on the wheat grain and steamed bread qualities in the three wheat varieties, with Aikang 58 exerting the best performance under waterlogging conditions. Full article

Biodegradable films are sustainable alternatives to conventional plastics, particularly in food preservation, where the barrier and mechanical properties are crucial for maintaining the physicochemical, microbiological, and sensory qualities of the product. This study evaluated films made from starches of corn, potato, cassava, yam, and wheat to determine their effectiveness in preserving cherry tomatoes. Amylose content, a key factor influencing the crystallinity and properties of the films, varied among the sources, with wheat starch having the highest (28.2%) and cassava the lowest (18.3%). The wheat starch film emerged as the best formulation, exhibiting the highest tensile strength and the lowest water vapor permeability (4.1 ± 0.3 g∙mm∙m⁻²∙h⁻¹∙KPa⁻¹), contributing to superior barrier performance. When applied to cherry tomatoes, the films based on wheat and corn starch showed the least moisture loss over fifteen days, highlighting their potential in fresh food preservation. These results suggest that starch-based films, specifically those rich in amylose, have significant potential as biodegradable packaging materials for food product conservation. Full article

Flours rich in resistant starch (RS) are crucial for producing low glycemic index foods, as per Commission Regulation (EU) No. 432/2012. This study assessed the environmental profiles of two high-RS fresh pasta variants: one from malted and decorticated Gradoli Purgatory beans, and another from amylose-rich soft wheat flour, using the Product Environmental Footprint standard method. Both pastas had similar carbon footprints, but the overall weighted score of malted bean pasta was 38% higher than that of the high-amylose wheat pasta, making the latter more economically and environmentally viable. Climate change and water use were major contributors to their environmental footprints, influenced by cultivation practices. Mitigation strategies, such as cultivating drought-resistant beans, are recommended. Although greenhouse gas emissions per gram of protein or RS were similar, overall scores varied, emphasizing the need for sustainable crop selection. Consumer preferences may favor high-amylose wheat for glucose metabolism, while gluten-free, protein-rich needs can be met with malted bean flour, despite its higher environmental impact. Full article

In this study, a developed wheat flour blend (F), consisting of a high content of non-starch polysaccharides, was fortified with cellulase (C) and a cellulase–xylanase complex (CX) and then processed via conventional and hybrid treatment methods. Dry heating (T), hydrothermal treatment (H) and extrusion processing (E) were applied without or with enzyme addition as hybrid treatments. Proximate composition and polysaccharide profiles selected techno-functional and structural properties of modified wheat flours, were analyzed. Conventional and hybrid treatments induced changes in polysaccharide fraction compositions (especially the arabinoxylans) and the rheology of modified flour. Dry heating caused an inconsiderable effect on flour composition but reduced its baking value, mainly by reducing the elasticity of the dough and worsening the strain hardening index, from 49.27% (F) to 44.83% (TF) and from 1.66 (F) to 1.48 (TF), respectively. The enzymes added improved the rheological properties and baking strength, enhancing the quality of gluten proteins. Hydrothermal enzyme-assisted treatment increased flour viscosity by 14–26% and improved the dough stability by 12–21%; however, the use of steam negatively affected the protein structure, weakening dough stretchiness and elasticity. Extrusion, especially enzyme-assisted, significantly increased the hydration properties by 55–67% but lowered dough stability, fat content and initial gelatinization temperature due to the changes in the starch, mostly induced by the hybrid enzymatic–extrusion treatment. The structure of extruded flours was different from that obtained for other treatments where the peak intensity at 20° was the highest, suggesting the presence of amorphous phases of amylose and lipids. The results can be helpful in the selection of processing conditions so as to obtain flour products with specific techno-functional properties. Full article

An increasing number of individuals are eating out due to work and study commitments. This trend directly influences people’s food choices, especially those who frequently rely on snacks and pre-packaged foods. Consuming these foods can lead to long-term health consequences. Adding functional foods to vending machines could lead to healthier choices. Our aim is to evaluate the acceptability and willingness to pay (WTP) of workers and students for a snack pack of novel functional biscuits (FBs) made with high amylose contents. We found that the experimental flour used is effective in preventing various non-communicable diseases; two phases of analysis were carried out on 209 participants. The participants blindly tested the products and only after the sensory evaluation were they informed about the biscuits’ health contents. Firstly, the blind investigation highlighted the acceptability of the FBs compared to the conventional biscuits. Secondly, the finite mixture model on WTP revealed that some consumers are interested in the health benefits associated with high-amylose test blends and others are focused on hedonistic taste. The design of a communication strategy and industry approach should aim to assist consumers in comprehending the health benefits and sensory aspects of novel functional foods available on the market. Full article

Starch, as a primary component of wheat, plays a crucial role in determining the quality of noodles and pasta. A deep understanding of the impact of starch on the quality of noodles and pasta is fundamentally important for the industrial progression of these products. The starch structure exerts an influence on the quality of noodles and pasta by affecting its functional attributes and the interaction of starch–gluten proteins. The effects of starch structure (amylopectin structure, amylose content, granules size, damaged starch content) on the quality of noodles and pasta is discussed. The relationship between the functional properties of starch, particularly its swelling power and pasting properties, and the texture of noodles and pasta is discussed. It is important to note that the functional properties of starch can be modified during the processing of noodles and pasta, potentially impacting the quality of the end product, However, this aspect is often overlooked. Additionally, the interaction between starch and gluten is addressed in relation to its impact on the quality of noodles and pasta. Finally, the application of exogenous starch in improving the quality of noodles and pasta is highlighted. Full article

Starch is composed of two types of carbohydrates, amylose and amylopectin. Improvements in the physical and chemical properties of natural starch can be made by modifying the starch. The modified starch has a healthy effect on the colon. The goal of this research is determine the effect of modified kepok banana starch substitution on ash, water, and protein content in cookies. The research used a completely randomized design (CRD). Comparison of modified kepok banana starch and wheat flour of 0%:100%, 25%:75%, 50%:50%, and 75%:25%. The highest cookie protein content was 6.26%; ash content was 2.97%; and water content was 8.83%. The conclusion is There is a relationship between the substitution of modified kepok banana starch and the protein content and ash content of the cookies. There was no effect of substitution of modified kepok banana starch on the moisture content of the cookies. Full article

In this study, the roles of kiwifruit soluble/insoluble dietary fiber (SDF/IDF, respectively) in the pasting characteristics and in vitro digestibility of wheat starch were explored. According to RVA and rheological tests, the IDF enhanced the wheat starch viscosity, decreased the gelatinization degree of the starch granules, and exacerbated starch retrogradation. The addition of SDF in high quantities could reduce the starch gelatinization level, lower the system viscosity, and exacerbate starch retrogradation. Through determining the leached amylose content and conducing scanning electron microscopy, the IDF and SDF added in high quantities was combined with the leached amylose wrapped around the starch granules, which reduced the leached amylose content and decreased the gelatinization degree of the starch granules. The Fourier transform infrared results showed that the addition of both the IDF and SDF resulted in an enhancement in hydrogen bonding formed by the hydroxyl groups of the system. The in vitro digestion results strongly suggested that both the IDF and SDF reduced the wheat starch digestibility. The above findings are instructive for the application of both IDF and SDF in starchy functional foods. Full article