Publications by authors named "Leqi Cui"

To improve the packaging properties of pea protein isolate (PPI) films, 2 wt% of essential oil (EO) from garlic, ginger, or cinnamon was individually incorporated into the films. The film properties were evaluated after the addition of EOs. The resulting PPI active films were applied to salmon to explore their efficacy in a real food system.

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Article Synopsis
  • - The study explored how replacing NaCl with KCl impacts the stability of oil-in-water (O/W) emulsions by affecting cetyltrimethylammonium bromide (CTAB) critical micelle concentration (CMC) and the distribution of lipid hydroperoxides and antioxidants.
  • - Replacing 1% NaCl with 1% KCl significantly altered the CMC of CTAB, while a similar molar concentration of KCl (171 mM) did not have the same effect.
  • - The substitution of NaCl with KCl led to lower levels of lipid hydroperoxides and thiobarbituric acid reactive substances (TBARS), suggesting a reduced prooxidant effect and highlighting the importance of
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This study investigated the effects of covalent bonding between pea protein isolate (PPI) and p-coumaric acid (p-CA) on the protein's secondary structure, solubility, foaming properties, emulsifying capacity, and thermal stability. Binding p-CA led to alterations in the secondary structure of PPI, including an increase in α-helix and random coil and a decrease in β-turn. Additionally, it resulted in a reduction in SH and NH groups, as well as a decrease in particle size.

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Inflammatory bowel disease (IBD), encompassing ulcerative colitis (UC) and Crohn's disease, entails chronic inflammation of the gastrointestinal tract. The pathogenesis of IBD implicates genetic factors, gut microbiome alterations, and immune dysregulation, contributing to its increasing global prevalence. The sturgeon-derived peptide, which exhibits promising anti-inflammatory effects, provides potential therapeutic insights for managing IBD symptoms.

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In this study, pea protein isolates (PPI) have been used to make conjugates by covalent binding with p-coumaric acid (p-CA), and the effect of conjugation on PPI structural characteristics and the structural, optical, mechanical, and physicochemical properties of conjugate-based films were investigated. The conjugation with p-CA unfolds the tertiary structure of PPI and significantly reduces the surface charge. A tendency of aggregation with increasing p-CA addition was proposed.

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Titanium silicon molecular sieve (TS-1) is an oxidation catalyst that possesses a long lifetime of charge transfer excited state, high Ti utilization efficiency, large specific surface area, and good adsorption property; therefore, TS-1 acts as a Ti-based photocatalyst candidate. In this work, TS-1 coupled BiMoO (TS-1/BMO) photocatalysts were fabricated via a facile hydrothermal route. Interestingly, the optimized TS-1/BMO-1.

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Pulses have attracted much attention in the food industry due to their low cost, high yield, and high protein content, which promises to be excellent alternative protein sources. Recently, techniques for covalent and noncovalent binding of pulse proteins to polyphenols are expected to solve the problem of their poor protein functional properties. Additionally, these conjugates and complexes also show several health benefits.

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Dihydrxytetraphenylmethane, also known as Bisphenol BP (BPBP), has been increasingly used in industrial production and more frequently detected in the environment as an alternative plasticizer of BPA. However, there are no reports about BPBP in food safety or its effects on cellular lipogenesis. The purpose of this research was to investigate the influence and potential mechanisms of BPBP on adipogenesis in 3T3-L1 cells.

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The aim of this study is to develop an antioxidant film based on pea protein isolate (PPI) without sacrificing the packaging properties. To achieve this, α-tocopherol was incorporated to impart antioxidant activity to the film. We investigated the effects on film properties resulting from the addition of α-tocopherol in a nanoemulsion form and pH-shifting treatment of PPI.

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The Atlantic white shrimp () is of great economic importance to the United States and risk being substituted with imported species due to a shortage in domestic production. To improve the current methods used for the identification of the Atlantic white shrimp species, we designed and validated a robust multiplex PCR-lateral flow assay for the onsite identification of . The standardized assay was validated using a miniaturized, low-cost PCR instrument with 68 shrimp, prawn, and fish samples, spread over fourteen seafood species.

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This study modified pea protein isolate (PPI) structure by high-pressure homogenization (HPH) and investigated PPI structural relation to the packaging properties of PPI film. HPH decreased PPI particle size, reduced surface charge, increased surface hydrophobicity, and increased free sulfhydryl, providing greater potential for covalent bonding during film formation. HPH decreased opacity of PPI films from 7.

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We studied the impacts of protein location (interface or aqueous phase) on the antioxidant and prooxidant activities of tea polyphenols (TP) in model oil-in-water emulsions (pH 7) at a low (0.01% w/v) or high (0.04 % w/v) concentration.

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Pea protein is a promising alternative to animal-based protein and the interest in its application in food industry has been rapidly growing. In this study, pea protein isolates (PPI) were used to form protein-based edible films and the effect of ultrasound treatment on the structure of PPI and the structural, optical, mechanical and physicochemical properties of PPI-films were investigated. Ultrasound induced unfolding of PPI and exposed interior hydrophobic groups to protein surface while both PPI dissociation and formation of large aggregates were observed, as confirmed by measuring intrinsic emission fluorescence, surface hydrophobicity, surface charge, and particle size distribution and polydispersity index, respectively.

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The beany flavor of pea protein limits its application in the food industry. This study aimed at addressing this problem by combining the advantages of solid-based spray drying technique and the ability of cyclodextrins (CD) to entrap volatiles. Pea protein isolates (PPI) was extracted by alkaline extraction-isoelectric precipitation, followed by co-spray drying with CD.

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Article Synopsis
  • - The study examined how different alkaline extraction pH levels (8.5, 9.0, and 9.5) affect the chemical properties and flavor profile of pea protein isolate (PPI) using various analytical techniques.
  • - Results showed that higher pH increased protein recovery yield but also led to more protein aggregates, reducing solubility; however, the protein's secondary structure remained unchanged.
  • - The optimal pH for extracting high-quality PPI, which had the least "beany" flavor, was identified as 9.0, indicating a balance between yield, functionality, and flavor for food applications.
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The objective of this research was to fabricate crude soybean oil oleogels (CSO) using β-sitosterol (BS) and/or monoacylglycerol (MAG) and compare their role with that of refined soybean oil oleogels (RSO) in cookie making. Both crude and refined soybean oil oleogels were formed with BS or MAG, or the combination of both (1 : 1) at a fixed concentration of 10 wt%. The thermal behavior of the oleogels was measured using differential scanning calorimetry (DSC).

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The expeller-pressed (EP) corn germ oil oleogels were prepared using rice bran wax (RBX) at different concentrations (3, 5, 7, and 9 wt%). Their structural properties, including color, hardness, thermal behavior, rheological property, and crystal structure were evaluated. The performance of oleogels for potential food application was examined by incorporating oleogels into cookies as a fully replacement for commercial shortenings.

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  • Salt (NaCl) is commonly used in food emulsions but the exact way it affects lipid oxidation and shelf life is not well understood.
  • This study reveals that NaCl reduces the critical micelle concentration (CMC) of sodium dodecyl sulfate (SDS), which helps solubilize lipid hydroperoxides into the water phase, enhancing preservation.
  • Additionally, NaCl changes how δ-tocopherol (a form of vitamin E) is distributed in the emulsion, contributing to better oxidative stability of the emulsions.
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Salts reduction/substitution have gained a lot interest from food industry since the US Food and Drug Administration (FDA) has issued a draft guidance for salt reduction. However how changes of salts in food formulation could influence lipid oxidation is still not fully understood. Using oil-in-water emulsions stabilized by a natural emulsifier - lecithin at pH 7.

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Background: Vegetable proteins are increasingly used to stabilize oil-in-water (O/W) emulsions. However, emulsions are thermodynamically unstable. Recently, high-intensity ultrasound (US) has been used to enhance the stability of emulsions.

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Krill oil is a unique source of omega-3 fatty acids since it is a mixture of phospholipids and triacylglycerols. Due to the presence of phospholipids, it can form oil-in-water emulsions without additional food additives. In this work, the physical stability of krill oil-in-water emulsions was determined at various pH values (3-7) and NaCl concentrations (50-1000 mM).

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Lipid oxidation in oil-in-water (O/W) emulsions is an important factor determining the shelf life of food products. Salts are often present in many types of emulsion based food products. However, there is limited information on influence of salts on lipid oxidation in O/W emulsions.

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The impact of association colloids on lipid oxidation in triacylglycerols and fatty acid ethyl esters was investigated. Association colloids did not affect lipid oxidation of high oleic safflower and high linoleic safflower triacylglycerols, but were prooxidative in fish triacylglycerols. Association colloids retarded aldehyde formation in stripped ethyl oleate, linoleate, and fish oil ethyl esters.

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