FOOD CONTROL
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2025
·
IF 6.3
Jie Zhang,Yalin Zhou,Jian Yuan,Guanglei Li,Peng Li,Wenjing Yan,Changrui Xing
Aflatoxin B 1 (AFB 1 ) contamination in plant oils poses a serious threat to food safety. Monitoring AFB 1 decontamination, such as by ultraviolet (UV) irradiation, is challenging due to matrix complexity and the lack of robust tools. This study developed a novel monoclonal antibody with exceptional organic solvent tolerance up to 60 % methanol, enabling a one-step direct competitive ELISA (dc-ELISA). This tolerance minimized sample preparation, allowing for direct AFB 1 quantification in diverse plant oil matrices with satisfactory recovery rates (73.7–128.9 %). The dc-ELISA was innovatively applied to monitor UV-induced AFB 1 degradation kinetics, showing a high correlation with HPLC and HPLC-MS/MS methods in acetonitrile and was effectively extended to track decontamination in peanut oil. Mechanistic studies via UPLC-Q/TOF-MS identified key degradation pathways involving demethylation, oxidation, hydrolysis, and loss of CO. Electrostatic potential (ESP) analysis revealed these structural modifications altered the electronic profiles of the degradation products, resulting in low cross-reactivity and fundamentally validating the assay's reliability for process monitoring. This work provides a practical, cost-effective, and reliable tool for both the detection and degradation monitoring of AFB 1 , establishing a promising on-site solution for comprehensive food safety control.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
·
IF 5.4
Zhengtao Zhu,Xi Deng,Yongqiang Ye,Na He,Bihe Yuan,Fei Xiao,Kaiyuan Li
To address the challenge of balancing fire safety and mechanical properties in thermoplastic polyurethanes (TPU), this study developed a CP@MIL-101 hybrid by confining liquid cyclic phosphates within the pore structure of MIL-101 using a hierarchical design strategy. The results demonstrated that the introduction of CP@MIL-101 slightly improved the thermal stability of TPU. Notably, the residual char yield increased significantly from 0.1 % to 9.3 % with only 0.5 % loading. With just 2 wt% loading of CP@MIL-101, the TPU composite achieved a UL-94 V-0 rating (3 mm) and exhibited a 20.4 % increase in the limiting oxygen index (LOI), reaching 26.0 %. Furthermore, significant reductions in peak heat release rate, total heat release, and fire growth rate index were observed, indicating enhanced fire safety of the TPU composites. Characterization analyses suggested that the improved fire retardancy resulted from the synergistic effects of MIL-101 and cyclic phosphates in both the condensed and gas phases, through the formation of a protective char layer and free radical quenching. Additionally, incorporating 2 wt% CP@MIL-101 endowed the TPU matrix with exceptional ultraviolet shielding properties due to unique electron transitions absorption. Simultaneously, the tensile strength of the TPU increased by 15.85 % compared to neat TPU, demonstrating mechanical reinforcement. This work establishes a strategic approach for developing multifunctional flame retardants and fire-safe TPU composites, paving the way for their application in high fire-safety environments.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Xingxing Huang,Yujie Ao,Haocheng Yang,Muyu Feng,Xuan Wang,Rui Chen,Qing Yang,Jinsuo Lu
With the rapid development of modern water treatment technologies, public perception of drinking water has shifted from simply ‘having water to drink’ to ‘drinking healthy water’. Despite the ability of modern water treatment plants to remove most pollutants, the presence of excess disinfection by-products (DBPs) in tap water is a major issue. Boiling is amongst of the oldest methods for purifying drinking water, and > 90 % of Chinese households still consume boiled water. This study proposes an enhanced photoelectrochemical–thermal synchronised technology (E-UV/BO) to address the issue of excess DBPs in tap water. The study shows that boiling can effectively remove volatile DBPs, such as trihalomethanes, with removal rates reaching 60 %–80 %, but the removal of haloacetic acids and aromatic DBPs was < 10 %. In contrast, the E-UV/BO technology achieves a removal efficiency of > 70 % for all DBPs, even with complete elimination. This enhancement in the removal efficiency can be attributed to the improved catalyst performance, reduced solution resistance, accelerated molecular motion and decreased intermolecular forces. FT-ICR MS confirmed that the E-UV/BO significantly simplified the molecular composition of dissolved organic matter and effectively removed halogenated and aromatic DBP precursors. For a family of four consuming 10 L of water per day, the daily power consumption of this small-scale device based on E-UV/BO is only 0.5–0.8 kWh. This technology not only offers a new approach to improving the quality of drinking water but also reduces the treatment burden on upstream water treatment plants, contributing to global efforts to ensure drinking water safety.
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MOLECULES
·
2024
·Vol. 29
·期 12
·2822
·
IF 4.2
Jian Xiao,Tingting Liu,Qiulu Chu,Chaoguang Yu,Yunlong Yin,Lei Xuan,Shufang Wu
Carboxymethyl cellulose (CMC) and polylactic acid (PLA) are recognized for their environmental friendliness. By merging them into a composite film, packaging solutions can be designed with good performance. Nonetheless, the inherent interface disparity between CMC and PLA poses a challenge, and there may be layer separation issues. This study introduces a straightforward approach to mitigate this challenge by incorporating tannin acid and ferric chloride in the fabrication of the CMC−PLA. The interlayer compatibility was improved by the in situ formation of a cohesive interface. The resulting CMC/TA−PLA/Fe multilayer film, devoid of any layer separation, exhibits exceptional mechanical strength, with a tensile strength exceeding 70 MPa, a high contact angle of 105°, and superior thermal stability. Furthermore, the CMC/TA−PLA/Fe film demonstrates remarkable efficacy in blocking ultraviolet light, effectively minimizing the discoloration of various wood surfaces exposed to UV aging.
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CHEMOSPHERE
·
2024
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IF 8.1
Yury A. Belikov,Olga A. Snytnikova,Dmitriy G. Sheven,Roman G. Fedunov,Vyacheslav P. Grivin,Ivan P. Pozdnyakov
Using methods of time-resolved and stationary photolysis, HPLC-MS and quantum-chemical calculations by the DFT method, the mechanism of direct UV photolysis of the antibiotic chloramphenicol (CAP) was established. For the first time, short-lived intermediates formed during photolysis were detected. The primary photoprocess is the cleavage of the β-C-C bond relative to the aromatic system with the formation of 4-nitrobenzylalcohol radical and residual aliphatic radical. The first radical in deoxygenated solutions predominantly transforms into para -nitrobenzaldehyde and its secondary photolysis products. In the presence of oxygen, the aromatic radical and para -nitrobenzaldehyde are transformed into para -nitrosobenzoic and para -nitrobenzoic acids as a result of reaction with reactive oxygen species (ROS). Formation of ROS is provoked by reactions of aliphatic radical with dissolved oxygen, so this radical is very important for CAP degradation. The quantum yield of direct photolysis of CAP is ∼3% and does not depend on the presence of dissolved oxygen and on the change of the excitation wavelength in the range of 254–308 nm. Obtained data are important for further understanding of the transformation pathways of CAP and similar PPCP in natural and wastewaters under the action of sunlight and artificial UV radiation.
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JOURNAL OF SOLID STATE CHEMISTRY
·
2020
·
IF 2.726
Bo Tang,Yuanzhe Dai,Yunfei Sun,Haiqun Chen,Zhengwei Wang
Various metal organic frameworks (MOFs) including ZIF-8, Uio-66 and Cu-BTC are prepared and adopted with reduced graphene oxide (RGO) to co-modify TiO 2 . The resulting composite photocatalysts display high photocatalytic performances under both UV- and visible-light irradiation, and the corresponding photocatalytic mechanisms are revealed by considering the electronic structures and morphologies of these ingredients, which are proven by IR curves, STM patterns, lifetime of photoinduced electrons. The influences of BET areas and pore diameters of the adopted MOFs on the resulting photocatalytic properties are studied, and the specific influence of interaction between TiO 2 and RGO on the observed photocatalytic activities are also discussed. The large BET areas of the MOFs endow high adsorption capacities to the resulting photocatalysts, while the closely chemical contact between TiO 2 and RGO achieves the visible-light activity. After optimization, the degradation rate constants of rhodamine-B reach 1.65 × 10 -1 min -1 and 1.12 × 10 -1 min -1 under UV- and visible-light irradiation, respectively.
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Current Analytical Chemistry
·
2024
·Vol. 21
·期 2
·124-133
·
IF 1.7
Zhengming Qian,Zhuobin He,Dongyin Lian,Qi Huang,Guoying Tan,Juying Xie
BackgroundFlavonoid is a type of active constituent in herbs and always used as the quality control markers of herbal medicines. Owing to the extensive diversity of flavonoids, numerous reference compounds are necessitated for the analysis of flavonoids, and some are usually very expensive, which engenders challenges in the analysis of flavonoids in herbal medicines. Consequently, the development of a simple, rapid, and reference compounds saving method is important for the determination of flavonoids in herbal medicines.ObjectiveIn order to develop a high-performance liquid chromatography (HPLC) method for the determination of 5 flavonoids (mangiferin, hesperidin, baicalin, buddleoside, and rutin) in five herbal medicines (Anemarrhenae rhizome, Sophorae flos, Citri reticulatae pericarpium, Scutellariae radix, and Chrysanthemi indici flos) with rutin.MethodsFive herbal medicine samples were prepared according to the Chinese Pharmacopoeia which includes ultrasound and reflux methods. The separation of the sample was performed on a PoroShell 120 EC-C18 (4.6 mm×100 mm, 2.7 μm) by gradient elution with 0.1% formic acid and acetonitrile at a flow rate of 1.0 mL/min. The wavelengths were set as follows: Anemarrhenae rhizome (363 nm), Sophorae flos (256 nm), Citri reticulatae pericarpium (236 nm), Scutellariae radix (263 nm), Chrysanthemi indici flos (354 nm).ResultsThe method validation showed that the established HPLC method was accurate and stable for quantitative analysis of flavonoids in five herbal medicines. The comparative analysis revealed that the determination results of the current HPLC method and Chinese Pharmacopoeia method are consistent, exhibiting less than 1% relative error. Remarkably, the developed HPLC method needs one cheapest reference compound (rutin) and costs 8 min for sample HPLC analysis.ConclusionThe developed HPLC method for quantitative analysis of five flavonoids in five herbal medicines is simple, rapid, and reference compound saving, which provides a good alternative method for quality control of flavonoids in herbal medicines.
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APPLIED SURFACE SCIENCE
·
2013
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IF 2.112
Zhenlong Yan,Weiqu Liu,Nan Gao,Honglei Wang,Kui Su
A novel functional fluorinated siloxane graft copolymer bearing with vinyl end-groups was synthesized from dihydroxypropyl-terminated poly(dimethylsiloxane) (PDMS), dicarboxyl terminated poly(2,2,3,4,4,4-hexafluorobutyl acrylate) oligomer (CTHFA), 2,4-toluene diissocyanate (TDI) and 2-hydroxyethyl methacrylate (HEMA). The chemical structure was characterized by FT-IR and GPC. The effect of concentration of the vinyl-capped fluorosilicone graft copolymer (Vi-PFSi) on the surface, thermal properties, dielectric and tribological properties of UV-cured films was investigated. Contact angles and surface energies showed that the high hydrophobic and oleophobic surfaces were obtained by incorporation of Vi-PFSi at very low amount (0.5 wt%). X-ray photoelectron spectroscopy (XPS) evidenced that the fluorinated and siloxane moiety selectively migrated to the outermost surface of UV-cured film, thus reduced its surface energy from 45.42 to 15.40 mN/m 2 without affecting its bulk properties. The morphology of fracture surface of modified film exhibited rough fracture surface only at the outermost surface, revealing fluorinated and siloxane groups migrated toward air-side surface. The dielectric constants decreased from 5.32 (1 MHz) for bisphenol-A epoxy methacrylate (EMA) to 2.82 (1 MHz) for modified film when the Vi-PFSi copolymer concentration increased from 0 to 0.8 wt%. Tribological results from abrasion tester suggested that the Vi-PFSi could obviously reduce the abrasion weight loss of modified films.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2025
·
IF 7.7
Shangke Liu,Ziming Yu,Liping Su,Panyi Hu,Youxiang Ren,Shiyu Liu,Haitao Ding,Shiqian Qi,Mengchang Yang,Min Zhang,Xiaohe Tian
Mitochondrial structural remodeling under oxidative stress is central to the pathogenesis of skin photoaging. Here, we report Mito-Py, a robust mitochondria-targeted probe with a special functional donor-π-acceptor (D-π-A) configuration. Featuring a large Stokes shift (∼130 nm) for minimal self-absorption and viscosity-sensitive emission via a twisted intramolecular charge transfer (TICT) mechanism, Mito-Py enables real-time mapping of mitochondrial viscosity fluctuations during UV-induced oxidative stress in HaCaT keratinocytes. Unlike membrane-potential-dependent dyes, Mito-Py achieves membrane-potential-independent mitochondrial retention, ensuring stable suborganellar localization even during depolarization events. Its exceptional resistance to photobleaching permits super-resolution structured illumination microscopy (SIM) to resolve UV-induced cristae fragmentation with ultrahigh spatial precision (sub-100 nm). Beyond cellular models, Mito-Py was applied to paraffin-embedded skin sections from a UV-induced murine photoaging model, where staining revealed markedly stronger fluorescence in photoaged skin compared to normal skin. These results underscore Mito-Py’s capability to detect mitochondrial alterations in complex tissue environments, providing a powerful, photostable tool for dissecting mitochondrial stress responses and exploring organelle crosstalk in photoaging and related dermatological disorders.
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MICROCHIMICA ACTA
·
2025
·Vol. 192
·期 5
·1-12
·
IF 5.3
Li Weixia,Lei Jiacheng,He Tiancheng,Gan Yaping,Zhu Yan
A novel Zr-based metal–organic framework (MOF) functionalized with graphene oxide-coated allylmethacrylate-divinylbenzene microspheres (AMA/DVB@GO), termed AMA/DVB@GO@UiO-66-NH 2 was designed. The composite exhibits great adsorption capacity and selectivity for bisphenols (BPs), driven by synergistic interactions, including hydrophobic, π-π, and hydrogen bonding. We optimized conditions to establish an efficient dispersive micro-solid phase extraction procedure coupled with high-performance liquid chromatography (d-μSPE-HPLC) for extracting BPs from milk samples, using the AMA/DVB@GO@UiO-66-NH 2 composite. The method achieved recoveries ranging from 84.0 to 106.6%, with relative standard deviations below 6.9% and detection limits between 0.17 and 0.67 μg/L. This study introduced a novel, hydrophilic, and stable AMA/DVB@GO@UiO-66-NH 2 composite, offering a promising material for the selective enrichment and detection of BPs in food analysis. Graphical
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Systems Microbiology and Biomanufacturing
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2025
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IF 2.9
Shi Yu,Li Huifan,Lu Yuqi,Chen Ming,Yang Hua,Fu Dongmei
A simple and robust reversed-phase high performance liquid chromatography procedure was developed with only an aqueous H 3 PO 4 solution (pH 2.1) as the mobile phase for the simultaneous determination of nine organic acids (oxalic, formic, malic, lactic, acetic, citric, succinic, fumaric, and gallic acids) in beer based on a polar-copolymerized 3-chloropropyl C18 column. The proposed method was validated according to linearity, limits of detection, accuracy, precision, repeatability, and reproducibility. Quantifications of the nine organic acids in 12 commercial Chinese beer samples from five different brands were conducted only after degassing and filtration of the samples. In all beer samples, the most abundant organic acid was succinic acid; its concentration was in the range of 907.99–3557.22 mg/L. This was followed by malic acid (170.39–936.78 mg/L). Principal component analysis was used to compare the different brand of beers according to organic acid concentration, and results may provide a reference for the evaluation of beer quality and taste.
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ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2025
·
IF 11.3
Zhuoran Feng,Yaoxuan Fu,Jiahui Li,Xiangni Lu,Shuo Wang,Yidi Chen,Wei Wang,Zhiqiang Sun,Jun Ma
The UV/sulfite advanced reduction process (ARP) holds promise for the removal of per- and polyfluoroalkyl substances (PFASs) by a hydrated electron (eaq–)-induced H/F exchange process under anoxic conditions. Traditionally, the presence of coexisting nitrate in water has always been regarded as a major inhibitory factor for PFASs defluorination. However, this study observed an unexpected promotive effect of nitrate on defluorination, challenging the previous phenomenon. Notably, the addition of 100 μM nitrate resulted in a remarkable 54% enhancement in PFOA defluorination. A novel mechanism was discovered that nitrate-derived reactive nitrogen species (RNS) activated the decarboxylation–hydroxylation–elimination–hydrolysis (DHEH) process, an important degradation pathway for PFASs in UV/sulfite ARP. Induced by eaq–, the PFAS molecule first became a perfluorinated radical and then was transformed into unstable perfluorinated alcohol by reacting with water. Due to the high reactivity driven by unpaired electrons of RNS, water molecules were destabilized with the H–O bond stretched from 0.98 to 1.04 Å. This effectively enhanced the spontaneity of the reaction between perfluorinated radical and water molecules and consequently made the whole DHEH process more thermodynamic favorable (ΔG, −23.53 → −376.28 kJ/mol). Such a process breaks through the view that the nitrate directly reacts with eaq– to affect PFASs defluorination in ARP systems. This finding offers an innovative perspective for optimizing PFAS defluorination by strategically regulating nitrate levels in water bodies.
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