Kian Siang Ong , Jie Hong Chiang , Shaun Yong Jie Sim , David Liebl , Mufeeda Madathummal , Christiani Jeyakumar Henry
{"title":"Functionalising insoluble pea protein aggregates using high-pressure homogenisation: Effects on physicochemical, microstructural and functional properties","authors":"Kian Siang Ong , Jie Hong Chiang , Shaun Yong Jie Sim , David Liebl , Mufeeda Madathummal , Christiani Jeyakumar Henry","doi":"10.1016/j.foostr.2022.100298","DOIUrl":"10.1016/j.foostr.2022.100298","url":null,"abstract":"<div><p>Commercial plant protein isolates contain a large fraction of non-functional proteins due to the harsh processing conditions used. Therefore, greater value can be unlocked by functionalising these “inert” plant proteins. Using commercial insoluble pea protein isolate (I-PPI) as an example, this study demonstrates the application of high-pressure homogenisation (HPH) as a physical method to improve the techno-functionality of I-PPI. The dispersions were HPH-treated at 60, 120, or 180 MPa for one, three, and five pressure cycles. HPH treatments resulted in decreased particle size (from 16.7 ± 1.3–9.4 ± 0.2 µm at 60 MPa) and increased zeta-potential. Microstructural observations revealed the formation of smaller aggregate clusters and flake-like structures after HPH treatments. The protein solubility of I-PPI (15.9 ± 2.0 %) under acidic conditions (pH 2) significantly increased at all HPH treatment levels, with the greatest increase at 120 MPa for 5 passes (27.2 ± 2.0 %). Remarkably, the non-gelling I-PPI was able to form self-standing gels (15 % w/w) after HPH treatments, with the greatest gel strength observed at 180 MPa. The emulsifying and foaming stability of HPH-treated I-PPI increased from 60 to 120 MPa but decreased at 180 MPa. Overall, our results demonstrate a key paradigm in protein modification: transforming insoluble plant proteins into functional protein ingredients.</p></div>","PeriodicalId":48640,"journal":{"name":"Food Structure-Netherlands","volume":"34 ","pages":"Article 100298"},"PeriodicalIF":4.7,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49223909","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Ultrasonography assessment of gastric emptying for different emulsion microstructures was superior to acetaminophen marker method","authors":"Samar Hamad, Jacqueline Maw, Amanda J. Wright","doi":"10.1016/j.foostr.2022.100299","DOIUrl":"10.1016/j.foostr.2022.100299","url":null,"abstract":"<div><p>Gastric emptying (GE) influences postprandial metabolism, including satiety and is partially mediated by food structure. Tools for routine GE assessment and suitable for a range of food structures in metabolic studies are warranted. This study compared GE results from the acetaminophen absorption (plasma concentration) versus ultrasonography (US, gastric antrum area) methods when 15 healthy men consumed four oil-in-water emulsions differing in lipid physical state and emulsifier acid stability, meaning gastric phase behaviours differed. Plasma acetaminophen was only correlated with antrum measurements for the intragastrically stable emulsion with liquid lipid droplets (P = 0.041, r = −0.69). The US results support the role of colloidal stability in delaying GE and the images showed different gastric phase behaviours. In contrast, acetaminophen solubility confounded the results when the emulsions were susceptible to acidic flocculation. US antrum measurements (but not the acetaminophen results) were also correlated with participant subjective satiety (P < 0.0001), supporting the close mediation of satiety perception by antral distention. Overall, US was superior to the acetaminophen method for assessing GE. It was easily implemented, provided visual insights into gastric phase behaviour, and predicted subjective satiety responses, allowing us to relate food structure and changes therein during digestion to metabolic response.</p></div>","PeriodicalId":48640,"journal":{"name":"Food Structure-Netherlands","volume":"34 ","pages":"Article 100299"},"PeriodicalIF":4.7,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45228185","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Benjamín Arredondo-Tamayo , Juan Vicente Méndez-Méndez , José Jorge Chanona-Pérez , Josué David Hernández-Varela , Lizbeth González-Victoriano , Susana Dianey Gallegos-Cerda , Eduardo Martínez-Mercado
{"title":"Study of gellan gum films reinforced with eggshell nanoparticles for the elaboration of eco-friendly packaging","authors":"Benjamín Arredondo-Tamayo , Juan Vicente Méndez-Méndez , José Jorge Chanona-Pérez , Josué David Hernández-Varela , Lizbeth González-Victoriano , Susana Dianey Gallegos-Cerda , Eduardo Martínez-Mercado","doi":"10.1016/j.foostr.2022.100297","DOIUrl":"10.1016/j.foostr.2022.100297","url":null,"abstract":"<div><p><span>Development of eco-friendly materials based on biopolymers and agro-food waste has increased due to severe pollution caused using plastic materials. The aim of this work was to obtain nanoparticles by high-energy milling at different times (1–3 h) from eggshells as they are a source of </span>calcium carbonate<span><span> and was study using microscopy and spectroscopy techniques. Particle size distribution and mean particle size were determined. After 2 h of milling, the smallest particles (84 ± 40 nm, with 91 % ≤ 100 nm) were obtained. The effect of the addition of eggshell nanoparticles (ENP) at different concentrations (1–3 wt%) on different functional properties of gellan gum (GG) films was studied. The results indicated that addition of ENP (3 wt%) improves hydrophobic, water barrier, mechanical, and thermogravimetric properties of the ENP/GG film in comparison with GG film. X-ray diffraction analysis and infrared spectroscopy provided information to propose a descriptive model to explain the chemical interactions between ENP and GG. Consequently, the films could be used to fabricate eco-friendly materials for use in the </span>food sector in the elaboration of dishes and shockproof protective netting for delicate fruits.</span></p></div>","PeriodicalId":48640,"journal":{"name":"Food Structure-Netherlands","volume":"34 ","pages":"Article 100297"},"PeriodicalIF":4.7,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43383675","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Jiang Yi , Dixue Luo , Qingyu He , Zhen Wen , Yujuan Lu
{"title":"Complex coacervation of α-lactalbumin with gum arabic: Effect of environmental condition, mass ratio, and biopolymer concentration","authors":"Jiang Yi , Dixue Luo , Qingyu He , Zhen Wen , Yujuan Lu","doi":"10.1016/j.foostr.2022.100296","DOIUrl":"https://doi.org/10.1016/j.foostr.2022.100296","url":null,"abstract":"<div><p><span><span>The coacervate formation and interaction between α-lactalbumin (ALA) and gum arabic (GA) was investigated with turbidimetric analysis, fluorescence spectroscopy, atom force microscopy (AFM), and isothermal titration </span>calorimetry (ITC). Critical pH values (pH</span><sub>c</sub>, pH<sub>φ1</sub>, pH<sub>opt</sub> and pH<sub>φ2</sub><span><span>) of phase transitions for ALA-GA complexes (1:1, 0.1%, w/v) without NaCl, representing the formation of soluble and insoluble complexes, were 4.95, 3.85, 3.70, and 2.30, respectively. pH and NaCl concentrations are dominant in influencing the formation of ALA-GA complexes. AFM graphs evidently indicated the formation, association, and dissociation of ALA-GA complex. ITC results confirmed that the formation of soluble ALA/GA complex was a spontaneous exothermic process, and the electrostatic interaction between ALA and GA was stronger at pH 3.0 than that at pH 4.9 and 5.6. The obtained information of this study provides insights into the interaction between ALA and GA and expands the application of ALA-based formulations in </span>food systems with desirable functionality.</span></p></div>","PeriodicalId":48640,"journal":{"name":"Food Structure-Netherlands","volume":"34 ","pages":"Article 100296"},"PeriodicalIF":4.7,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71854038","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Structural, functional, and anti-cancer properties of conjugates of quinoa protein isolate and olive leaf polyphenolic extract: Application in production of bread","authors":"Mohammad Amin Aliyari , Seyedeh Fatemeh Sadeghian Motahar , Maryam Salami , Mirko Betti , Elnaz Hosseini , Zahra Habibi-Kelishomi , Bahram Goliaei , Atiyeh Ghasemi","doi":"10.1016/j.foostr.2022.100292","DOIUrl":"10.1016/j.foostr.2022.100292","url":null,"abstract":"<div><p><span><span>Plant-based proteins are of growing interest in the food industry as an alternative to replace animal based ones, however, their functional properties are limited and research is needed in order to improve emulsifying, foaming, solubility properties. The objectives of the present study were to investigate the impacts of complexation between quinoa protein isolate (QPI) and different concentrations of olive leaf polyphenolic extract (OLE) (0.1 %, 0.2 %, 0.3 %, 0.4 %, and 0.5 %) on the structural changes, functional properties, and in-vitro gastric digestion of QPI. The cytotoxicity of the hydrolyzed QPI/OLE complex, in which proteins turn to </span>bioactive peptides<span>, was evaluated using human stomach cancer cell lines. Additionally, bread using optimum QPI/OLE complex was produced and textural, sensorial, and color properties were evaluated. Fluorescence quenching and surface hydrophobicity measurements showed that QPI and OLE were complexed mainly through hydrophobic interactions. SDS-PAGE revealed that the complexation between the protein and phenolic compounds<span> was appropriate and also complexes were highly digestible in stomach-like conditions. Additionally, OLE could enhance solubility, foaming as well as emulsification properties of QPI significantly. The rate of lipid hydroperoxide formation in QPI/OLE samples containing greater amounts of OLE was also reduced significantly. QPI/OLE complexes also exhibited a large potential to scavenge free radicals. </span></span></span><em>In-vitro</em> digestion experiment showed that the addition of OLE to the QPI solution promoted the production of bioactive peptides. According to the anti-cancer results, hydrolyzed QPI/OLE complexes exhibited a greater cell survival reduction in comparison to the OLE alone. Analysis of produced bread also revealed that the hardness of samples decreased with addition of QPI/OLE complexes. This study demonstrated that QPI/OLE complex shows the potential to be developed by food industry as a tailor-made functional food with health benefits.</p></div>","PeriodicalId":48640,"journal":{"name":"Food Structure-Netherlands","volume":"33 ","pages":"Article 100292"},"PeriodicalIF":4.7,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46062582","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Effect of bleaching and defatting treatment of camel skin on the color, structural and interfacial properties of extracted gelatin","authors":"Samson Olumide Fawale , Tholkappiyan Ramachandran , Hamed Fathalla , Sajid Maqsood","doi":"10.1016/j.foostr.2022.100275","DOIUrl":"https://doi.org/10.1016/j.foostr.2022.100275","url":null,"abstract":"<div><p>The effect of defatting and bleaching of camel skin on gel-forming, structural, and interfacial properties of extracted gelatin was studied. Gelatin defatted for 6 h and bleached for 48 h (48BD-6 h) gave the highest yield (28.44%) while gelatin bleached for 24 h (24 BC) gave the highest gel strength (423.3 g). Electrophoretic analysis showed that all gelatin samples had α-chains as the predominant protein type. Fourier transformation infrared (FTIR) spectroscopy showed that all gelatin samples possessed major peaks in the amide region with reduced peak intensity recorded in defatted and bleached samples because of the loss of the triple helix state of the gelatin. X-ray diffraction analysis indicated that all the gelatin samples are basically amorphous with both weak and sharp peaks observed around 7° and broad peaks at ~19–22°. Microstructural analysis revealed highly cross-linked network with less voids in all the gelatin samples which correlated with high gel strength recorded. Colour of the gelatin powder samples were significantly improved by bleaching with an increase in the <em>L</em><sup>∗</sup>-value and decrease in the <em>a</em><sup>∗</sup>-value. These results indicates that with bleaching, gelatin molecules were oxidized, resulting in the production of gelatin cross-links, giving gelatin an improved gel strength, colour, and functionality.</p></div>","PeriodicalId":48640,"journal":{"name":"Food Structure-Netherlands","volume":"33 ","pages":"Article 100275"},"PeriodicalIF":4.7,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71815027","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Veronica Gallo , Annalisa Romano , Pasquale Ferranti , Giovanni D’Auria , Paolo Masi
{"title":"Properties and in vitro digestibility of a bread enriched with lentil flour at different leavening times","authors":"Veronica Gallo , Annalisa Romano , Pasquale Ferranti , Giovanni D’Auria , Paolo Masi","doi":"10.1016/j.foostr.2022.100284","DOIUrl":"10.1016/j.foostr.2022.100284","url":null,"abstract":"<div><p>The effects of three leavening times (60, 105 and 150 min) on structure and some physico-chemical and nutritional properties of bread added with 20 % of green lentil flour were investigated. Leavening time largely affected bread physico-chemical properties, leading to a significant reduction in moisture content, an increase in weight loss and a darker appearance of bread crumb as leavening time increased. Besides, crumb of bread leavened for the longest time (B150) showed a compact structure and the highest resistance to the compression, while the Young’s modulus increased linearly with the rising of leavening time. By contrast, breads leavened for shorter times (B60 and B105) had a more porous structure with more circular bubbles compared to B150, exhibiting lower deformation resistance.</p><p><span><span>Different bread macrostructure had a significant impact on the in vitro protein and starch digestibility. The α amino nitrogen release and the estimated </span>Glycemic Index (eGI) at the end of digestion reached the lowest values in bread leavened for the longest time (B150). In particular, eGI showed a linear correlation both with the Young’s modulus (R</span><sup>2</sup> = −0.926) and macrostructural properties (R<sup>2</sup> = 0.902), suggesting that modelling bread structure by acting on leavening time can be a novel approach to develop healthier products.</p></div>","PeriodicalId":48640,"journal":{"name":"Food Structure-Netherlands","volume":"33 ","pages":"Article 100284"},"PeriodicalIF":4.7,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46521923","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Haobo Jin , Shanshan Sun , Zhuo Sun, Qi Wang, Yongguo Jin, Long Sheng
{"title":"Ultrasonic-assisted spray drying as a tool for improving the instant properties of egg white powder","authors":"Haobo Jin , Shanshan Sun , Zhuo Sun, Qi Wang, Yongguo Jin, Long Sheng","doi":"10.1016/j.foostr.2022.100289","DOIUrl":"10.1016/j.foostr.2022.100289","url":null,"abstract":"<div><p>The mechanism by which high-intensity (20 kHz) ultrasonic treatment affected the rehydration performance and microstructure of egg white<span> powder (EWP) was explored in this study. The wettability and dispersibility of EWP prepared from high-intensity ultrasound treated egg white liquid were observed to have an exciting enhancement. Furthermore, the most excellent dispersibility (65.67 s), solubility (90.33 g/100 g) and stability (98 %) of EWP were detected when ultrasonic treatment (120 W, 20 kHz, 10 mm ultrasonic horn) was performed for 10 min. SDS-PAGE results showed that ultrasonic treatment promoted the depolymerization of the original protein macromolecular aggregates. The particle size and scanning electron microscopy results also indicated that the particle size of EWP tended to decrease. Additionally, the zeta potential<span> and surface hydrophobicity analyses suggested a tendency to first increase and then decrease over time. Overall, the instant properties of EWP were improved due to the changes of protein microstructure and conformation caused by ultrasonic treatment. These results revealed the mechanism of high intensity ultrasound affecting the instant properties and microstructure of EWP, which provided a theoretical basis for improving the rehydration of other food protein powder.</span></span></p></div>","PeriodicalId":48640,"journal":{"name":"Food Structure-Netherlands","volume":"33 ","pages":"Article 100289"},"PeriodicalIF":4.7,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45752536","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}