Food safety has emerged as a paramount concern in global health, prompting innovative approaches to ensure the safety of people's sustenance. In this study, a novel strategy was devised to fabricate FeO-ZnO-MnO hybrid nanobiocatalysts, which exhibited remarkable enzymatic activity surpassing that of Horseradish peroxidase (HRP) catalysis. It demonstrated exceptional proficiency in decomposing 3,3',5,5'-tetramethylbenzidine (TMB) without the need for harsh reaction conditions or the aid of HO.
View Article and Find Full Text PDFMagnetic solid-phase extraction (MSPE) technology for tetracycline (TCC) was developed by employing the novel and pre-designed FeO-COOH@hydrogen-bonded organic frameworks (HOFs) adsorbents in complex food samples. The HOF shell was grown onto the FeO-COOH core by in-situ self-assembled method. The excellent MSPE performances with less solvent, less adsorbent and time consumption were derived from the hydrogen bonding, π-π and hydrophobic interactions between HOF shell and TCC.
View Article and Find Full Text PDFNovel magnetic covalent organic frameworks (COFs) were prepared by one-pot synthetic strategy and employed as an efficient adsorbent for magnetic solid-phase extraction (MSPE) of naphthaleneacetic acid (NAA) in food samples. Depending on the predesigned the hydrogen bonding, π-π and hydrophobic interactions of magnetic COFs, the efficient and selective extraction process for NAA was achieved within 15 min. The magnetic COFs adsorbent combined with HPLC-UV was devoted to develop a novel quantitative method for NAA in complex food.
View Article and Find Full Text PDFThe FeO-Zn-Mn nanomimetic enzyme demonstrates significant importance in dual-substrate colorimetric detection for , owing to its enhanced sensitivity, selectivity, and rapid detection capabilities. Additionally, it offers cost-effectiveness, portability, and the potential for multiplex detection. This innovative approach holds promise for improving the monitoring and control of infections, thereby contributing to advancements in public health and food safety.
View Article and Find Full Text PDFBackground: Phenolic endocrine-disrupting chemicals (EDCs) are widespread and easily ingested through the food chain. They pose a serious threat to human health. Magnetic solid-phase extraction (MSPE) is an effective sample pre-treatment technology to determine traces of phenolic EDCs.
View Article and Find Full Text PDFIn this study, a new method for the detection of ascorbic acid (AA) was proposed. It was based on the protective effect of AA on silver triangular nanoplates (Ag TNPs) against Cl induced etching reactions. Cl can attack the corners of Ag TNPs and etch them, causing a morphological shift from triangular nanoplates to nanodiscs.
View Article and Find Full Text PDFNovel FeO-Ag-MnO composites were successfully synthesized. It was noteworthy that the obtained FeO-Ag-MnO composites were found to possess three types of enzyme-mimicking activities, including peroxidase-like, catalase-like and oxidase-like activities. Taking advantage of the oxidase properties of FeO-Ag-MnO, the direct oxidation of TMB could be catalyzed to generate blue oxidation products without HO.
View Article and Find Full Text PDFCovalent organic framework (COF)-decorated magnetic nanoparticles (FeO@DhaTab) with core-shell structure have been synthesized by one-pot method. The prepared FeO@DhaTab was well characterized, and parameters of magnetic solid-phase extraction (MSPE) for parabens were also investigated in detail. Under optimized conditions, the adsorbent dosage was only 3 mg and extraction time was 10 min.
View Article and Find Full Text PDFSpectrochim Acta A Mol Biomol Spectrosc
November 2022
A novel ultra-small hydrazone-linked covalent organic polymer (UHCOP) was synthesized based on the Schiff-base reaction between 2,4,6-trihydroxy-1,3,5-benzenetricarbaldehyde and 1,4-benzenedicarbohydrazide at room temperature and utilized as a sensitive fluorescent sensor for rapid (<2 min) and selective detection of Fe in aqueous solution. The prepared UHCOP displayed ultra-small size with the diameter of 7.98 ± 0.
View Article and Find Full Text PDFEfficient magnetic solid phase extraction using crystalline porous polymers can find important applications in food safety. Herein, the core-shell FeO@COFs nanospheres were synthesized by one-pot method and characterized in detail. The porous COF shell with large surface area had fast and selective adsorption for propylparaben via π-π, hydrogen bonding and hydrophobic interactions.
View Article and Find Full Text PDFStaphylococcus aureus (S. aureus) is a pathogen closely associated with foodborne diseases. We prepared a reliable colorimetric sensor to detect S.
View Article and Find Full Text PDFColloids Surf B Biointerfaces
September 2021
Glyceraldehyde-3-phosphate dehydrogenase (GAPDH) from Lactobacillus plantarum is a novel biocatalyst in the degradation of histamine, but its properties need enhancement before practical application. Herein, we used FeO magnetic nanoparticles (MNPs) as the carrier core to prepare immobilized GAPDH. GAPDH was cloned, expressed in E.
View Article and Find Full Text PDFA facile, in situ growth strategy for the synthesis of monodispersed COF@SiO microspheres is reported. The microspheres have uniform and controllable COF shells, and are used as the stationary phase for HPLC. The TpBD COF, constructed from 1,3,5-triformylphloroglucinol (Tp) and benzidine (BD), is taken as the COF shell, and aminosilica (SiO -NH ) is employed as the core to support the TpBD shell.
View Article and Find Full Text PDFGlucose monitoring with high sensitivity and accuracy in the cerebrospinal fluid is a challenge for evaluating the role of glucose in the physiological and pathological processes. In this work, a ratiometric fluorescent probe for sensing glucose was developed. In the probe, the gold nanoclusters protected by ovalbumin played the role as the reference of fluorophore and the Alizarin Red S-3-aminophenyl boronic acid immobilized on the poly(N-acryloxysuccinimide) acted as both the response signal and specific recognition unit for sensing glucose.
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