JOURNAL OF ECONOMIC ENTOMOLOGY
·
2025
·
IF 2.4
Tian Chao,Tang Jie,Zhu Qingyu,Guo Xiqian,Shu Qilong,Gu Zhiya,Li Fanchi,Li Bing
Bombyx mori (L.) (Lepidoptera: Bombycidae) is an important economic insect, and Exorista sorbillans (W.) (Diptera: Tachinidae) is an endoparasitic pest of larval B. mori. Dimethoate is less toxic to B. mori than E. sorbillans and is used in sericulture to controlling E. sorbillans. To investigate the effects of dimethoate treatment on the gut microorganisms and physiological functions of B. mori, 16S rRNA sequencing was used to analyzed the composition and structure of the gut microbiota. This study investigated their role in enhancing silkworm resistance by screening dominant populations after dimethoate treatment. The results indicated that dimethoate did not alter the composition of the dominant gut bacterial groups in silkworm; however, it significantly increased the abundance of the gut bacteria Methylobacterium and Aureimonas, and decreased the abundance of Enterobacterales, Bifidobacterium, Blautia, Collinsella, Faecalibacterium, and Prevotella. Eleven strains of dimethoate-resistant bacteria were selected through in vitro culture, all of which were unable to grow when dimethoate was used as a carbon source. Additionally, a germ-free silkworm model was established to assess detoxifying enzyme activity in the midgut. The results revealed that the gut symbiotic microbiota can enhance dimethoate resistance by increasing detoxification enzyme activity. This study identifies a novel pathway for silkworm resistance to dimethoate based on gut microbiota, providing new insights into the role of symbiotic gut bacteria in insecticide metabolism.
研究领域:
昆虫学
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微生物学
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农药科学
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产品关联
DOI
PubMed
高影响因子
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
·
2021
·
IF 6.158
Boqian Li,Shu Li,Ludong Yi,Haosheng Sun,Jun Qin,Jun Wang,Dawei Fang
Diazinon (DZN), a broad-spectrum and highly effective organophosphorus pesticide, is widely being used in agricultural production and household environments. However, massive DZN effluent can be generated during the DZN production process, which will cause devastating effects on the ecosystem and damage human health due to the improper dispose of pesticide effluent before discharging. In this work, hydrodynamic cavitation (HC), a new advanced oxidation technology, was used to degrade DZN in wastewater for the first time. The influences of DZN initial concentration (5.0–15 mg/L), solution pH (4.0–10), temperature (30–50 °C) and some orifice plate geometric parameters (orifice numbers and orifice half angles) on the degradation effect of DZN were investigated. It can be observed that the DZN in solution can be effectively degraded in orifice plate HC system based on three orifices with 45° convergent half angle and the degradation ratio can reach 50.52 % under the operation conditions of 150 min treatment time, 30 °C temperature and pH = 4.0 acidity. Subsequently, the studies of intensifying DZN degradation were also carried out through adding different inorganic oxidants such as potassium peroxodisulfate (K 2 S 2 O 8 ), potassium periodate (KIO 4 ) and sodium perchlorate (NaClO 4 ). The maximum DZN HC degradation extent (81.92 %) can be achieved in the presence of K 2 S 2 O 8 under the optimized conditions. The generated intermediate products in DZN HC degradation process are some low-toxic and low-active substances. And that, these intermediate products can be further mineralized to H 2 O, CO 2 and inorganic ions. On the basis of cavitational yield, the energy consumption analysis has been performed. Overall, this work demonstrates that the HC combined with oxidant K 2 S 2 O 8 may be a promising strategy for the large-scale treatment of organophosphorus pesticide wastewater.
研究领域:
环境科学
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农药化学
✓ 已验证
DOI
高影响因子
Analytical Methods
·
2016
·Vol. 8
·期 48
·8506-8513
·
IF 1.915
Zhen Sheng,Jianfeng Zhang,Chenyu Li,Ligang Chen
The development of new, sensitive and simple methods for the rapid detection of dimethoate (DMT) in water is vitally important. A fluorescent probe technique has been developed for the rapid trace detection of pesticide residues. In our study, the method used is based on the fluorescence resonance energy transfer, which is also known as FRET. Dithizone (DZ) was bound to cadmium (Cd) on the surface of CdTe QDs to form a DZ–Cd complex. Then, the fluorescence of the CdTe QDs was immediately quenched because of the FRET between the CdTe QDs and the surface of DZ–Cd complex. After the addition of DMT to the DZ-functionalized QDs, DZ was separated from the surface of the QDs and was replaced by DMT, and the fluorescence of the QDs was restored. This method was validated using water samples spiked with DMT. Two good linear relationships were obtained in the range from 0.01 to 5.0 μg mL−1 and 5.0 to 40 μg mL−1; the detection limit was calculated to be 0.005 μg mL−1, and reasonable recoveries (88.6–95.3%) were achieved for the direct detection of DMT in water samples. This method is rapid, convenient and environmentally acceptable and shows potential for the rapid detection of DTM in water samples.
研究领域:
环境科学
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分析化学
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产品关联
DOI
高影响因子
FOOD CONTROL
·
2023
·
IF 6
Lian Xia,Jianxun Han,Xiaohuan Huang,Xiaojuan Niu,Xin Lin,Yuangen Wu
The overutilization of dimethoate may lead to its deposition in both the environment and crops, which potentially induces neurological, respiratory, and hepatic abnormalities upon absorption by organisms. Colorimetry can accurately determine dimethoate, but there are still many challenges in the rapid, convenient, and point-of-care detection. Herein, based on the inhibitory effect of dimethoate on the laccase activity of silver citrate (AgCit), a smartphone-assisted colorimetric sensor and rapid detection enzyme sheets were constructed. It was demonstrated that dimethoate could adsorb on the surface of AgCit and inhibit the production of semiquinone radicals in the reaction system. Then, the AgCit laccase activity was inhibited, causing the colorimetry sensor and the enzyme sheets turned light red or even colorless. The constructed sensor has higher sensitivity and the limit of detection for dimethoate is 1.0 μg⋅L −1 . Moreover, the developed enzyme sheets have good selectivity and specificity, and display the detection results within 5 min. Thus, the colorimetric sensor and the constructed enzyme sheets are expected to be used for large-scale preliminary detection of dimethoate residues in actual agricultural products.
研究领域:
环境科学
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食品科学
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生物化学
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产品关联
DOI
高影响因子
JOURNAL OF CHROMATOGRAPHY A
·
2024
·
IF 3.8
Yanbo Tian,Abdul Majid,Yuewei Zhang,Liju Tan,Huiru Li,Na Wang,Jiangtao Wang
In this study, molecularly imprinted polymers (MIPs) were prepared for the specific recognition of organophosphorus pesticides and a rapid, efficient and simple method was established for the detection of dimethoate (DIT) in food samples. Fe 3 O 4 magnetic nanoparticles were synthesized by co-precipitation, and Fe 3 O 4 /ZIF-8 complexes were prepared by a modified in-situ polymerization method, and then magnetic molecularly imprinted polymers (MMIPs) were prepared and synthetic route was optimized by applying density functional theory (DFT). The morphological characterization showed that the MMIPs were coarse porous spheres with an average particle size of 50 nm. The synthesized materials are highly selective for the organophosphorus pesticide dimethoate with an adsorption capacity of 461.50 mg·g −1 and are effective resistance to matrix effects. A novel method for the determination of DIT in cabbage was developed using the prepared MMIPs in combination with HPLC. The practical results showed that the method can meet the requirements for the determination of DIT in cabbage with recoveries of 85.6–121.1 % and detection limits of 0.033 μg·kg −1 .
研究领域:
食品科学
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分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Xiaofang Shen,Zhaoxia Li,Yan Cui,Yuehong Pang
Thiol biomolecule of glutathione (GSH) combined with lead ion as precursor for synthesis of hierarchical PbS via hydrothermal degradation has been developed. The precursor and as-prepared PbS were characterized by Fourier-transform infrared spectra (FTIR), X-ray diffraction (XRD), scanning electronic microscopy (SEM) and electrochemical technique. Flower-shaped micron crystals, submicron-sized spherical particles and dendritic PbS were controllably synthesized by adjusting pH value of the precursor solutions. GSH acted as both soft template and sulfur source in the synthesis. To investigate the suitability of PbS for pesticidal sensing application, an pesticidal biosensor based on the AChE-CHIT/dendritic PbS/GCE has been devised. Organophosphate pesticide dimethoate was selected as model to examine the feasibility of pesticidal bio-sensing. Under the optimum conditions, a quantitative measurement of dimethoate was achieved with the linear range of 0.05 μM to 1.0 μM and the detection limit of 0.02 μM.
研究领域:
材料科学
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分析化学
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环境科学
✓ 已验证
DOI
高影响因子
Foods
·
2021
·Vol. 10
·期 11
·2810
·
IF 4.35
Xinpeng Yan,Zhong Zhang,Runguang Zhang,Tian Yang,Guoying Hao,Li Yuan,Xingbin Yang
Given the imperative of monitoring organophosphorus pesticides (OPs) residues in the ecosystem, here a novel, facile and sensitive fluorescence sensor is presented for the rapid detection of dimethoate. In this work, surface molecularly imprinted polymer (SMIP) and microfluidic technology had been introduced to enhance the selectivity and portability of the described methodology. Oil-soluble CdSe quantum dots (QDs) synthesized in a green way were used as fluorescent material for the selective detection of dimethoate on the basis of static quenching and photoinduced electron transfer mechanism. Among many kinds of paper materials, glass fiber paper was used as the novel substrate of paper chip due to low pristine fluorescence and better performance when combining CdSe QDs. In the process of molecular imprinting, the interaction between several functional monomers and dimethoate molecule was investigated and simulated theoretically by software to improve the selectivity of the sensor. Consequently, the fabricated novel detection platform could effectively respond to dimethoate in 10 min with the concentration range of 0.45–80 μmol/L and detection limit of 0.13 μmol/L. The recovery in the spiked experiment soybean sample was in an acceptable range (97.6–104.1%) and the accuracy was verified by gas chromatography-mass spectrometry, which signified the feasibility and potential in food sampling.Keywords:oil-soluble CdSe QDs;dimethoate;microfluidic paper chip;fluorescence sensor
研究领域:
分析化学
·
食品安全
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2022
·
IF 6.371
Yu Liu,Shuai Yang,Xinyu You,Linlin Qin,Yiming Qin,Wenwen Zhang,Wenyan Liang
Electrocatalytic hydrogenation (ECH) has been used as a novel approach for the synthesis of organic compounds. Hence, ZIF-67 was selected as a precursor in this study to synthesize a series of electrodes. The ECH effects were assessed on pyridine and diazines. The results showed a significant influence of carbonization temperature and time on the electrocatalyst activity. A temperature of 400 °C was found not high enough for the synthesis of the electrocatalysts, and a long time of 4 h at 800 °C resulted in damage to the spatial structure of the electrocatalyst. The optimal electrocatalyst was obtained under 800 °C and 2 h (Co/NC-800–2). The polyhedral Co/NC-800–2 (20–200 nm) had the N-doped graphitic-carbon shell with embedded Co/CoN/Co 3 O 4 nanoparticles . The onset potential and overpotential (at 10 mA cm −2 ) were estimated to respectively 64 and 155 mV versus hydrogen evolution reaction (HER), with a Tafel value of 62 mV dec −1 . The ECH on pyridine and diazines revealed a positive correlation between ECH effect and HER activity. Co/NC-800–2 possessed excellent ECH activity toward pyridine and pyrazine at − 0.3 V (vs. RHE). N–Co, pyridinic-N, and graphitic-N acted as active sites during electrocatalysis . The N-doped graphitic-carbon promoted the charge transfer during ECH processes.
研究领域:
材料科学
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电化学
·
催化反应
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产品关联
DOI
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
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2015
·
IF 2.912
Xincheng Yan,Rui Rong,Shanshan Zhu,Mingchun Guo,Shang Gao,Shasha Wang,Xiaolong Xu
The extensive applications of ZnO nanoparticles (nano ZnO) and dimethoate have increased the risk of people’s coexposure to nano ZnO and dimethoate. Therefore, we evaluated in this study the effects of nano or bulk ZnO on dimethoate-induced toxicity in mice. The serum biochemical parameters, biodistributions, oxidative stress responses, and histopathological changes in mice were measured after intragastric administration of nano or bulk ZnO and/or dimethoate for 14 days. Oral administration of nano or bulk ZnO at a dose of 50 mg/kg did not cause obvious injury in mice. In contrast, oral administration of dimethoate at a dose of 15 mg/kg induced observable oxidative damage in mice. Co-administration of nano or bulk ZnO with dimethoate significantly increased Zn accumulation by 30.7 ± 1.7% or 29.7 ± 2.4% and dimethoate accumulation by 42.8 ± 2.1% or 46.6 ± 2.9% in the liver, respectively. The increased accumulations of dimethoate and Zn in the liver reduced its cholinesterase activity from 5.64 ± 0.45 U/mg protein to 4.67 ± 0.42 U/mg protein or 4.76 ± 0.45 U/mg protein for nano or bulk ZnO, respectively. Furthermore, the accumulations of dimethoate and Zn in liver also increased hepatic oxidative stress, resulting in severe liver damage. Both nano and bulk ZnO dissolved quickly in acidic gastric fluid, regardless of particle size; therefore, they had nearly identical enhanced effects on dimethoate-induced toxicity in mice.
研究领域:
毒理学
·
纳米技术
·
药理学
✓ 已验证
DOI
PubMed
高影响因子
BIOSENSORS & BIOELECTRONICS
·
2019
·
IF 9.518
Deshuai Kong,Rui Jin,Tianshuang Wang,Hongxia Li,Xu Yan,Dandan Su,Caileng Wang,Fangmeng Liu,Peng Sun,Xiaomin Liu,Yuan Gao,Jian Ma,Xishuang Liang,Geyu Lu
Precise monitoring of pesticide with portable device was challenging because it required high sensitivity, short response time, strong stability and excellent selectivity. Herein, we newly constructed a stimuli-responsive hydrogel (SRHg)-based portable kit by embedding copper nanoparticles (CuNPs) in agarose hydrogel. In this work, dimethoate as inhibitor of urease restrained the generation of ammonia, which reduced in-situ etching of CuNPs, resulting in the fluorescence color response of test kit under ultraviolet illumination. Interestingly, by means of smartphone-based nanocolorimetry, the photo image of portable kit could be translated into digital information using ImageJ software, achieving a direct quantitative tool for dimethoate identification. The simplicity of SRHg-based portable kit combined with smartphone-based color recognition not only improved the analysis sensitivity (detection limit of 1.0 μg L −1 ), accuracy and stability, but also simplified operation process and shortened sample-to-answer analysis time (55 min), demonstrating that the methodology met the needs of daily testing and provided a new sight for on-site monitoring of food safety and human health.
研究领域:
分析化学
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食品安全
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
REACTIVE & FUNCTIONAL POLYMERS
·
2024
·
IF 4.5
Yan Liu,Wenji Kang,Libo Nie,Fen Xiao,Yilong Li,Qinbin Ma,Danqi Lin,Guiyin Zhou,Sihua Liu,Kehui Sun,Xiangqian Li
Oral colon-targeted drug formulations play a pivotal role in managing colon diseases, yet the effectiveness of most hydrophobic drug formulations in reaching the colon orally is hindered by challenges such as poor solubility, premature release in the stomach, and low bioavailability. In this study, we devised a pH-sensitive dual-network hydrogel utilizing sodium alginate and methacrylic acid for treating ulcerative colitis. The primary rigid network layer is activated thermally through free radicals, while the secondary flexible network layer is formed by the coordination of alginic acid and calcium ions. Sulfadiazine was loaded into the hydrogels using a solution displacement method. We conducted a comprehensive analysis of the morphology, mechanical properties, and drug release mechanisms of the hydrogels. The hydrogel demonstrated outstanding pH-responsive swelling properties. In acidic environments, protonation of carboxyl groups led to hydrogel network contraction, while in weakly alkaline environments, deprotonation induced electrostatic repulsion, facilitating swelling and controlled drug release. The alteration of pH from 1.2 to 7.4 increased the drug release rate from 33 % to 92 %, aligning with the first-order kinetic release model. The drug-loaded gel exhibited a compressive stress of 0.13 MPa at 50 % strain, and its superior mechanical properties ensured stability before drug release. Moreover, the hydrogel displayed excellent biocompatibility, hemocompatibility, and thermal stability. In summary, these findings underscore the substantial potential of drug-loaded gels in advancing controlled drug delivery systems.
研究领域:
药剂学
·
生物材料学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2018
·
IF 6.735
Wentao Shang,Zijun Dong,Mu Li,Xiulan Song,Miao Zhang,Chengchun Jiang,Sun Feiyun
As a type of iodinated contrast medium (ICM), the diatrizoate (DTZ) found in aquatic systems has posed a serious threat to the ecosystem and to human health. In this study, Fe(II)-activated persulfate (Fe 2+ /PS) oxidation was employed to degrade DTZ, and the optimal operating conditions were determined. Electron paramagnetic resonance (EPR) spectra and density functional theory (DFT) calculations were adopted to determine the dominant radicals and analyze the degradation paths, respectively. It was found that a PS concentration of 10 mmol/L, an n(Fe 2+ )/n(PS) ratio of 1:10, an initial pH of 3.0, and a high temperature increased the degradation efficiency of DTZ. After suppression of the oxidation process by tertiary butyl alcohol (TBA) and methanol (MtOH), the EPR spectra demonstrated that DTZ degradation was attributed to the combined effects of SO 4 − and OH and that OH played a more important role. Based on the theoretical calculation and comparison of the reduction energies of possible degradation products, the path from DTZ to TP630 and then to TP628 and finally to TP602 was recognized as the main DTZ degradation pathway during the Fe 2+ /PS oxidation process. These findings validated and demonstrated that DTZ could be effectively degraded by Fe 2+ /PS oxidation, which is a promising approach to remove DTZ from water.
研究领域:
环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）