SENSORS AND ACTUATORS B-CHEMICAL
·
2018
·
IF 5.667
Xiaozhou Li,Tianyue Yang,Youtao Song,Jinghai Zhu,Deli Wang,Wei Li
Here we describe a surface-enhanced Raman scattering (SERS)-based immunochromatographic assay (ICA) method for the dual detection of two pyrethroid pesticides cypermethrin and esfenvalerate. In the proposed ICA-SERS methods, antibody conjugated gold nanoparticles (AuNPs) were used as the SERS substrate while fluorescence tags labeled on AuNPs were used as the Raman reporters for SERS. Through the immuno-specific combination of antigen and antibody, Raman reporter labeled AuNPs were immobilized on the test line of the ICA strip and facilitated the SERS measurement. And by immobilizing two test lines designed for the detection of two pesticides, a simultaneous dual detection was accomplished. The LODs of the ICA-SERS system was 2.3 × 10 −4 and 2.6 × 10 -5 ng/mL for cypermethrin and esfenvalerate, respectively. The sensitivity was 3 to 4 times higher than ELISA and fluorescent-based ICA methods using the same indirect competitive immunoassay methods. For the three types of samples (tap water, river water, and milk), the recoveries ranged from 94.9% to 112%, with RSD values ranged from 1.3% to 13.5%. The research reveals that this ICA-SERS method possesses high specificity, sensitivity, and reproducibility, and can be reliably used to detect dual pesticides in real samples. An R Shiny-based application 2plex-speclysis was built and used for all the data analyses in this paper. The application was designed to incorporate all the analyses including spectral preprocessing, performance evaluation, and PCA analysis, and make the spectral analysis accessible for people without programming experience.
研究领域:
分析化学
·
环境科学
·
食品科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Gang Xia,Xueyan Bian,Yuanfeng Wang,Yintung Lam,Yuanyuan Zhao,Suju Fan,Peng Qi,Zhan Qu,John H. Xin
Personal protective clothing with versatile and durable features is highly desirable for daily and specific environmental scenarios. Especially for outdoor workers or sports enthusiasts, prolonged outdoor exposure requires their clothing to be more functional to cope with a wide range of situations, such as heat stress in summer, odor generation after sweating, and mosquito bites. These not only reduce the wearing comfort of clothing, but also bring potential heat stroke, skin infections and diseases brought by mosquitoes. Currently, most outdoor protective clothes focus on a single function, such as waterproofing and UV protection and are not able to cope with the demand of multiple protections. In this paper, we developed permethrin-containing triblock cationic polymers (PTCPs) that can multi-functionalize outdoor clothing. Benefiting from their high affinity to polyester fibers, PTCP modified polyester yarns were obtained by an aqueous based finishing process. After that, a scalable machine-knitting fabrication technique is employed to fabricate Janus outdoor protective clothes (Janus-OPC). The as-prepared Janus-OPC exhibited excellent one-way moisture transfer properties (forward cumulative one-way transfer index (OWTI) of 924.23%, and backward OWTI of −690.52%), antimicrobial properties (97.73% and 99.72% against E. coli and S. aureus , respectively), and mosquito repellent properties (repelling rate of 76.19%). Moreover, the protective performance of the Janus-OPC was maintained after 50 times of equivalent home laundering cycles. This multifunctional protective clothing opens up a new direction for the next-generation outdoor wear.
研究领域:
材料科学
·
纺织工程
·
高分子化学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2024
·
IF 5.7
Shu Zhu,Shangying Qin,Chonghui Wei,Li Cen,Luyun Xiong,Xingyu Luo,Yilin Wang
Background Organophosphorus pesticides (OPs) play important roles in the natural environment, agricultural fields, and biological prevention. The development of OPs detection has gradually become an effective strategy to avoid the dangers of pesticides abuse and solve the severe environmental and health problems in humans. Although conventional assays for OPs analysis such as the bulky instrument required analytical methods have been well-developed, it still remains the limitation of inconvenient, inefficient and lab-dependence analysis in real samples. Hence, there is an urgent demand to develop efficient detection methods for OPs analysis in real scenarios. Results Here, by virtue of the highly efficient catalytic performance in Fe 7 S 8 nanoflakes (Fe 7 S 8 NFs), we propose an OPs detection method that rationally integrated Fe 7 S 8 NFs into the acetylcholine (ACh) triggered enzymatic cascade reaction (ATECR) for proceeding better detection performances. In this method, OPs serve as the enzyme inhibitors for inhibiting ATECR among ACh, acetylcholinesterase (AChE), and choline oxidase (CHO), then reduce the generation of H 2 O 2 to suppress the oxidation of 3,3′,5,5′-tetramethylbenzidine (TMB) that catalyzed by Fe 7 S 8 NFs. Benefiting from the integration of Fe 7 S 8 NFs and ATECR, it enables a sensitive detection for OPs ( e.g. dimethoate). The proposed method has presented good linear ranges of OPs detection ranging from 0.1 to 10 μg mL −1 . Compared to the other methods, the comparable limits of detection (LOD) of OPs are as low as 0.05 μg mL −1 . Significance Furthermore, the proposed method has also achieved a favorable visual detection performance of revealing OPs analysis in real samples. The visual signals of OPs can be transformed into RGB values and gathered by using smartphones, indicating the great potential in simple, sensitive, instrument-free and on-site analysis of pesticide residues in environmental monitoring and biosecurity research.
研究领域:
分析化学
·
环境科学
·
生物技术
·
农业科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY
·
2025
·
IF 4
Yuhan Zhao,Xiaojie Zhou,Mei Li,Xinghui Qiu
The Asian tiger mosquito Aedes albopictus transmits several arboviruses, including chikungunya, Zika, and dengue, posing serious public health threats. The excessive use of insecticides has led to increasing resistance to commonly applied insecticides in this species. We previously observed that enhanced expression of a CYP6Z8 homolog (AalbCYP6Z8) was associated with insecticide resistance in two field populations of Ae. albopictus ; however, its capacity in insecticide metabolism had not been biochemically characterized. In this study, to explore the potential role of AalbCYP6Z8 in insecticide metabolism, a fully functional enzyme system was reconstituted in vitro by using Escherichia coli –produced recombinant AalbCYP6Z8 and NADPH-dependent cytochrome P450 reductase along with cytochrome b 5. Our metabolism assays showed that CYP6Z8 was capable of metabolizing organophosphates (temephos and malathion) and carbamates (propoxur and bendiocarb), but not pyrethroids (deltamethrin and permethrin). Mass spectrometry analyses tentatively identified the structures of specific metabolites, revealing that AalbCYP6Z8 transforms organophosphates through oxidative desulfurization and carbamates through dealkylation and hydroxylation. This work demonstrates that AalbCYP6Z8 is a versatile metabolizer of acetylcholinesterase-inhibiting insecticides.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2025
·
IF 9.8
Aying Wen,Yao Xiong,Qiang Li,Qingrun Liu,Guoliang Li,Bing Shao
In this work, covalent organic framework (COF)-derived magnetic nanocomposites (Fe 3 O 4 @PDA@COF TABP ), comprising Fe 3 O 4 as the magnetic core, polydopamine (PDA) as the hydrophilic interlayer, and COF TABP as the outer shell, were first constructed and utilized as the powerful adsorbents for the magnetic solid-phase extraction (MSPE) of pyrethroids (PYRs). The introduction of the PDA coating facilitated the growth of the COF TABP shell and simultaneously provided additional adsorption sites, thereby enhancing the extraction efficiency. Molecular docking simulations revealed that Fe 3 O 4 @PDA@COF TABP exhibited excellent affinity toward PYRs through synergistic π-π stacking, hydrogen bonding, and hydrophobic interactions. The developed MSPE method coupled with GC-μECD exhibited excellent linearity (R 2 ≥ 0.9988), low limits of detection (0.025–0.064 μg kg −1 ), satisfactory recoveries (82.4 %–106.8 %), and low relative standard deviations (RSDs <7.1 %). Finally, the established method was successfully applied to the quantification of trace PYRs in vegetable samples, demonstrating its strong potential for routine pesticide residue monitoring in vegetables.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
AQUATIC TOXICOLOGY
·
2024
·
IF 4.1
Afrasyab Khan,Bibimaryam Khan,Shakeel Hussain,Yuhan Wang,Weijun Mai,Yongzhong Hou
Permethrin (Per) is a widely used and frequently detected pyrethroid pesticide in agricultural products and the environment. It may pose potential toxicity to non-target organisms. Per has been reported to affect lipid homeostasis, although the mechanism is undefined. This study aims to explore the characteristic transcriptomic profiles and clarify the underlying signaling pathways of Per-induced lipid metabolism disorder in zebrafish liver. The results showed that environmental exposure to Per caused changes in the liver index, histopathology, and oxidative stress in zebrafish. Moreover, transcriptome results showed that Per heavily altered the pathways involved in metabolism, the immune system, and the endocrine system. We conducted a more in-depth analysis of the genes associated with lipid metabolism. Our findings revealed that exposure to Per led to a disruption in lipid metabolism by activating the KRAS-PPAR-GLUT signaling pathways through oxidative stress. The disruption of lipid homeostasis caused by exposure to Per may also contribute to obesity, hepatitis, and other diseases. The results may provide new insights for the risk of Permethrin to aquatic organisms and new horizons for the pathogenesis of hepatotoxicity.
研究领域:
毒理学
·
分子生物学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ANALYTICA CHIMICA ACTA
·
2025
·
IF 6
Pan Tao,Yang Luo,Kai Zheng,Jing Cao,Li Zhu,Xunsi Wang,Wei Zhang,Shixun Dai,Qiushun Zou,Peiqing Zhang
Background Permethrin is a pesticide used to kill insects, and once used in excess, it poses a great threat to the environment and human health, therefore, it is necessary to realize the rapid and accurate detection of permethrin. Fiber optic surface enhanced Raman scattering (SERS) probes have the advantages of small volume and can be used for remote monitoring, which have great potential for application in achieving in-situ detection of pesticide residues. Results Fiber taper waist (FTW) SERS probes modified by silver nanocubes-graphene oxide (Ag NCs-GO) composite structures were prepared for in situ detection of permethrin in lake water. Evanescent wave was used to excite SERS signals from Ag NCs-GO composite substrates, which was designed to enhance signals through expanded excitation light-analyte contact area. Ag NCs can provide stronger hot spots, and GO further enhances the sensitivity of SERS through electron transfer and improves the stability of the detection. The detection limit of prepared FTW SERS probe for Rhodamine 6G (R6G) was calculated to be 8.5×10 -9 M and RSD were all below 5% using the drop-casting method. The in-situ detection limit of R6G and permethrin in water was tested to be 10 -6 M and 10 -5 M, respectively. Significance This work utilizes fiber optic evanescent waves to excite SERS signals, and adopts a special FTW structure and SERS substrates to achieve good performance. The synergistic enhancement of electromagnetism and chemistry is realized while increasing the contact area, which improves the sensitivity of in situ detection of the pesticide residue permethrin. It Promotes the application of fiber optic SERS sensors in pesticide residue detection.
研究领域:
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF CHROMATOGRAPHY A
·
2025
·
IF 4
Sitian Gu,Wenli Zhu,Yufei Liu,Huixiao Duo,Qingli Yang,Xiudan Hou
Efficient enrichment of analytes and purification of matrices are crucial for the highly sensitive detection and monitoring of pesticides in traditional Chinese herbs. This work prepared magnetic ionic liquid-controlled covalent organic framework (IL-COF@Fe 3 O 4 ) as the sorbent via a simple in-situ precipitation polymerization and thiolene “click” strategy. The IL-COF@Fe 3 O 4 exhibited remarkable adsorption performance towards pyrethroids within 5 min. The adsorption of four pyrethroids on the surface of IL-COF@Fe 3 O 4 was according with Langmuir model and pseudo-second-order kinetic model. The adsorption energies were theoretically calculated, which were permethrin>cypermethrin>fenvalerate>bifenthrin. The modification of ILs improved extraction capacity mainly because of the interaction of imidazole and Cl or F and the pore size effect. This method was developed for the rapid extraction of four pyrethroids in Codonopsis pilosula and Angelica sinensis . The linear range was 0.05–200 μg L -1 . Matrix effects were ranging from -16.14% to 9.53%, indicating the strong matrix anti-interference ability of IL-COF@Fe 3 O 4 .
研究领域:
分析化学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMOSPHERE
·
2024
·
IF 8.1
Tianzhu Guan,Ning Li,Ya Gao,Mingyuan Gao,Qin Hu,Yajun Gao,Lixia Xiao,Zhenquan Yang,Qiaoquan Liu
Latest observations indicated that exposure of organic environmental neurotoxins may increase the potential risk of Alzheimer's diseases (AD). As a suspected food-derived risk factor, permethrin, composed of cis -isomer and trans -isomer, is widely used as a broad-spectrum pyrethroid insecticide in agricultural crops for the arthropod pests controlling. Thus, evaluating the impact of permethrin exposure is of great importance to human health. In this study, we performed the toxicological network approach to decipher AD-related mechanisms of cis -permethrin and trans -permethrin. Based on the toxicological network construction and central network topological analysis, human serum albumin (HSA) was selected as the core targets in AD-related developing. From the analysis of the steady state and time-resolved fluorescence quenching of HSA in presence of permethrin mixture, it has been inferred that the nature of the quenching mainly originates from the dynamic modes. Experimentally, the thermodynamic parameters revealed hydrophobic interactions and van der Waals forces played a major role during quenching process. Tryptophan synchronous fluorescence spectra were blue shifted whereas the position of tyrosine synchronous spectra was red shifted during the complex formation. Three-dimensional fluorescence together with FT-IR experiment confirmed that permethrin caused the secondary structure changes in HSA. To better understand the binding patterns between HSA and cis/trans -permethrin, theoretical calculation and molecular docking were implemented. According to the electrostatic potential map, the electrophilic attack region corresponds for electron rich oxygen atoms, while the nucleophilic attack regions were mainly located at over the benzene rings and methyl on cyclopropane ring of permethrins. Docking results shown that cis -permethrin and trans -permethrin located in hydrophobic pocket nearby Domain IIA with the different binding affinity (−7.6 and −9.2 kcal/mol), which consistent with the competitive displacement experiment. All these findings generated in the present study facilitated the elucidation of the molecular mechanism details between permethrin mixture and HSA, which provided fresh insights into the links between environmental exposure and AD-related adverse health outcomes.
研究领域:
环境毒理学
·
神经生物学
·
药理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF CHROMATOGRAPHY A
·
2026
·
IF 4
Huiru Xu,Yuqing Zong,Kehan Yin,Rimao Hua,Xiangwei Wu,Jiaying Xue
Water resources are increasingly contaminated by industrial and agricultural pollutants, with pesticide residues posing a persistent challenge. Most existing methods were designed for a single purpose of either measuring or eliminating water pollutants, while integrated strategies containing both functions remain scarce. Here we reported a novel semi-automatic silicone rubber (SR) based multi-vial microextraction technique for the simultaneous determination and removal of fifteen pesticides from aqueous matrices. An integrated adsorption-desorption platform enabled effective in-situ extraction of the target pesticides via hydrophobic effects. Key parameters including ultrasonication extraction for 45 min and two sequential 5-min desorption with 5 mL of hexane/ethyl acetate (1:1, v/v) were employed. The quantitative analysis was validated in real waters of the Nanfei River, Chao Lake, and tap water with good recoveries (72.8–112.6 %) and relative standard deviations (0.1–7.5 %), superior limits of detection (0.0020–0.20 μg/L) and quantification (0.006 to 0.50 µg/L), and free matrix effects (87.5–102.1 %) by gas chromatography equipped with electron capture detector. Focusing on its selectivity and recyclability, the proposed approach was further applied to purifying green tea and chrysanthmum tea infusions, achieving over 90 % removal efficiency for most pesticides. These results demonstrated that the semi-automatic SR-based multi-vial microextraction is a robust and effective method for both quantifying and eliminating target pesticides from waters and tea infusions. The high throughput and low cost encourage its potential for customized commercial application in monitoring and remediating emerging pesticides in environment and food fields.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2025
·
IF 4.6
Lin-Lin Zhang,Zeng Chen,Li Li,Wuying Yang,Dan Wang,Yanping Hong,Kaijie Tang,Jiaxin Hong,Lu-Ying Duan,Limin Lu
Developing a multifunctional sensor that can detect food-related multi-analytes is significant for food safety but remains challenging due to the difficulty of integrating multiple functions into one sensor. Herein, a dual-luminescent europium metal-organic framework (EuMOF) was elaborately synthesized through a simple self-assembly process, during which Eu 3+ coordinated with 2-hydroxyterephthalic acid (HTPA) and 1,10-phenanthroline that delivered strong characteristic fluorescence of HTPA and Eu 3+ . The resultant EuMOF exhibited good detection performance toward Sn 4+ and amitraz with different response behaviors. As for target Sn 4+ , the remarkably enhanced fluorescence from HTPA was observed and the fluorescence for Eu 3+ decreased significantly, which was attributed to the structural disintegration of EuMOF caused by Sn 4+ . Whereas, the presence of amitraz weakened both luminescence of HTPA and Eu 3+ owing to the synergistic function of inner filter effect and photoinduced electron transfer. Furthermore, an intelligent and miniature sensor that incorporated EuMOF-based test paper with color recognition application was exploited for portable visual analyzing Sn 4+ and amitraz in real samples, affording great possibilities for on-site monitoring of food hazards.
研究领域:
材料科学
·
分析化学
·
食品安全
·
传感器与生物传感器
·
环境监测
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MICROCHIMICA ACTA
·
2025
·Vol. 192
·期 11
·1-15
·
IF 5.3
Li Jin-Yu,Mei Li-Ping,Wang Zhi-Gang,Fang Ke-Ming,Wang Ai-Jun,Feng Jiu-Ju
Well-defined high-entropy alloy PtPbBiFeMn nanoplates (HEAPs) were synthesized by a wet-chemical co-reduction approach. The PtPbBiFeMn HEAPs exhibited excellent peroxidase (POD)-like activity. Leveraging this POD-mimicking property, a dual-mode sensor was developed for quantitative determination of a typical organophosphorus (OP) omethoate. Specifically, the nanozyme oxidizes colorless 3,3′,5,5′-tetramethylbenzidine (TMB) and o -phenylenediamine (OPD) with H 2 O 2 to its colored form. This reaction is regulated by alkaline phosphatase (ALP)-mediated hydrolysis of ascorbic acid 2-phosphate (AAP) to ascorbic acid (AA), which reduces oxidized TMB and modulates the detection signals. Additionally, ascorbic acid (AA) is converted to dehydroascorbic acid (DHAA). Consequently, an ALP-dependent fluorescence response is obtained through the condensation reaction between OPD and DHAA, yielding the fluorescent compound 3-(1,2dihydroxy ethyl) furo[3,4- b ] quinoxalin-1(3 H) with a maximum emission wavelength in the range 568 to 430 nm. When ALP existed, the colorimetric method for omethoate displayed a linear range of 10.02–167.10 × 10 −4 mg kg −1 with a limit of detection (LOD) of 8.76 × 10 −4 mg kg −1 ( S / N = 3), while a ratiometric fluorescence ( I 430 / I 568 ) approach had a linear range of 6.68 × 10 −4 –384.3 × 10 −4 mg kg −1 with an LOD of 6.63 × 10 −4 mg kg −1 ( S / N = 3). This work provides constructive insights to simplify biosensing platforms for food safety and environmental monitoring. Graphical
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）