Publications by authors named "Saiqing Xu"

Lactic acid bacteria (LAB) fermentation can enhance the quality and flavor characteristics of fruit juice. Herein, the impact of individual Lactiplantibacillus plantarum subsp. plantarum (L.

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An optimized multi-stage separation strategy was developed to purify lily bulb polyphenol oxidase (PPO) for revealing its molecular structure. The PPO was purified 14.64-fold with high specific activity of 153,900 U/mg via optimized conditions of phosphate buffer pH (6.

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Article Synopsis
  • Researchers created a chitosan film that reacts to visible light by adding a new material, a nanohybrid of poly(tannic acid) and titanium oxide (TP-NPs).
  • This combination improved the nanofiller's properties, resulting in smaller band gaps and better efficiency in generating reactive oxygen species, making the film about twice as effective at killing bacteria like Staphylococcus aureus and Escherichia coli under visible light.
  • The film not only strengthened the mechanical aspects of chitosan but also effectively preserved the quality of fruits like grapes and kiwifruit, showcasing its potential as a multifunctional active packaging solution.
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Inspired by the citrus oil gland and cuticular wax, a multifunctional material that stably and continuously released the carvacrol and provided physical defenses was developed to address issues of fresh-cut fruits to microbial infestation and moisture loss. The results confirmed that low molecular weight and loose structure of starch nanoparticles prepared by the ultrasound-assisted Fenton system were preferable for octenyl succinic anhydride modification compared to native starch, achieving a higher degree of substitution (increased by 18.59 %), utilizing in preparing nanoemulsions (NEs) for encapsulating carvacrol (at 5 % level: 81.

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Article Synopsis
  • Alternaria alternata (A. alternata) is a common pathogen responsible for fruit decay and can produce harmful toxins known as Alternaria toxins (ATs) that pose risks to human health.
  • The study found that methyl ferulate (MF) effectively inhibited the production of ATs at concentrations of 200 and 8000 mg/L, both in lab settings and in real-life fruit conditions.
  • MF disrupts various metabolic processes and reduces the synthesis of specific genes related to AT production and pathogenicity, offering insights into controlling harmful toxin production.
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In this study, the curdlan-polyphenol complexes were constructed by a pH-driven method. The interaction between curdlan and various hydrophobic polyphenols (curcumin, quercetin, and chlorogenic acid) was investigated. Curdlan could self-assemble into particles for loading polyphenols through hydrogen bonding and hydrophobic interactions.

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In this study, the effects of grafting chlorogenic acid (CA) on the antioxidant and probiotic activities of curdlan oligosaccharides (CDOS) were investigated. CDOS with degrees of polymerization of 3-6 was first obtained by degradation of curdlan with hydrogen peroxide and then grafted with CA using a free radical-mediated method under an ultrasonication-assisted Fenton system. The thermal stability and antioxidant ability of CDOS were enhanced after grafting with CA.

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Multi-active food packaging was prepared for strawberry fruit preservation where epigallocatechin gallate (EGCG)-containing pectin matrix and natamycin (NATA)-containing chitosan (CS) matrix were utilized to complete LBL electrostatic self-assembly. The results showed that the physicochemical properties of the multi-active packaging were closely related to the addition of NATA and EGCG. It was found that NATA and EGCG were embedded in the CS/pectin matrix through intermolecular hydrogen bonding interactions.

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Ultrasound (US) assisted with Fenton (US-Fenton) reaction was developed to efficiently and greenly prepare starch nanoparticles (SNPs) that were employed as nanofillers to enhance gelatin (G) film properties. Compared to Fenton reaction alone, US-Fenton reaction significantly improved preparation efficiency and dispersion of SNPs (p < 0.05).

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