PEST MANAGEMENT SCIENCE
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2025
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IF 3.8
Wenhua Rao,Shang Gao,Minyu Li,Chao Shen,Tao Lin,Dingyang Zhang,Xiaohong Pan,Binghai Lou,Guocheng Fan,Jinfeng Hu
BACKGROUND Citrus canker, a bacterial disease caused by Xanthomonas citri subsp. citri (Xcc), is one of the major threats to the citrus industry. Inorganic copper (Cu) formulations such as Bordeaux mixture and Kocide 3000 are currently used to control citrus canker; however, they are poorly water-soluble and have negligible plant transport, making the systemic treatment of citrus canker difficult. RESULTS This study synthesized Cu 2 O@His by one-pot self-assembly of Cu 2+ and histidine for controlling citrus canker. The results showed that Cu 2 O@His had a uniform size distribution (≈2.7 nm) and good water solubility. It could disrupt the cell membrane of Xcc and enter into the bacterial cells to destroy the DNA, thereby inhibiting the growth (half maximal inhibitory concentration = 7.4 μg mL −1 ) and production of virulence factors of Xcc. This was attributed to its excellent dispersibility and reactive oxygen species-inducing ability. The therapeutic efficacy and plant transport of Cu 2 O@His were much better than those of Kocide 3000. Additionally, it had remarkable biosafety for citrus plants and earthworms (lethal concentration 50% >> 40 mg kg −1 ). CONCLUSION This study provides a new, eco-friendly and more efficient option for citrus canker control. © 2025 Society of Chemical Industry.
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ACS Sustainable Chemistry & Engineering
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2025
·
IF 7.3
Ran Wang,Wei Song,Hangyuan Xu,Jian Wen,Wanqing Wei,Zhaoyang Chen,Guipeng Hu,Cong Gao,Xiaomin Li,Jia Liu,Jing Wu
l-Asparagine (l-Asn) is an important amino acid with broad applications in food, medicine, fine chemicals, and environmental protection. However, its industrial production is limited by the high cost of raw materials and the low catalytic efficiency of enzymes. In this study, a three-enzyme cascade pathway (FDN) was designed to produce l-Asn, using fumaric acid as the raw material. Within this pathway, EcAsnA was identified as the rate-limiting enzyme and was subsequently engineered using a product rescue strategy to reduce product inhibition by opening the closed gate. The optimal mutant, L109 K/K58R, exhibited a 6.61-fold reduction in product inhibition and a 4.24-fold improvement in catalytic efficiency. This mutant was then integrated into Escherichia coli along with the other two enzymes to construct the optimal recombinant strain E. coli 17. Using diatomite-glutaraldehyde cross-linking immobilized E. coli 17 as a biocatalyst, 267.74 g of l-Asn (with 5.35 g·L–1·h–1 STY, > 99% ee) was produced across 50 batch feedings in 1 L reaction volume. The purity of l-Asn exceeded 99% after isolation and purification. This study demonstrates the effective integration of cascade reaction design, enzyme engineering, and cell immobilization, providing a promising approach for synthesizing high-value products from cost-effective substrates.
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TALANTA
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2024
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IF 5.6
Kai Zhang,Yule Qian,Chaoyan Lou,Mingli Ye,Yan Zhu
PyICLab is an open-source Python-based package featuring an object-oriented programming (OOP) interface, providing tools for realistic and customized numerical simulations of ion chromatography (IC). In this paper, we showcase PyICLab's use in simulating diverse separation scenarios, including isocratic carbonate elution, gradient hydroxide elution, high-concentration and large-volume injections. The accuracy of the embedded models was validated by demonstrating strong correlations between predicted and experimental results. Additionally, PyICLab's capability to handle complex IC configurations was demonstrated through a simulation of a column-switching system for seawater analysis. PyICLab offers valuable resources for chromatographic optimization, method development, and educational purposes. It is available on PyPI at pypi.org/project/pyIClab. Interested readers can install PyICLab using the pip command in a Python 3.11 or higher environment.
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COMBUSTION AND FLAME
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2024
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IF 5.8
Haikun Lang,Fangping Bin,Shuyao Chen,Xiaoli Zhang,Jiuzheng Yin,Jinzeng Pan,Zhandong Wang,Lixia Wei
Fischer–Tropsch synthesis is an important route for the productions of cleaner fuels from non-petroleum materials. Monomethylated alkanes are present in large quantities in Fischer–Tropsch synthetic fuels. However, side-chain position may make a difference in the combustion of the fuels. In this work, the 4-methylheptane (MH4) pyrolysis was investigated experimentally by using a jet-stirred reactor at 800–1125 K and at 760 Torr. Major pyrolysis products, including small molecules and aromatic products, were identified and measured by using the synchrotron ultra-violet photoionization method. Several species were detected and measured, including CH 4 , C 2 H 2 , C 2 H 4 , C 2 H 6 , C 3 H 4 , C 3 H 6 , C 3 H 8 , C 4 H 6 , IC 4 H 8 , C 5 H 6 , C 5 H 8 1-3, C 5 H 10 -2, benzene, naphthalene, indene and C 6 H 5 C 2 H, etc. A detailed kinetic model of MH4 pyrolysis was developed and validated against the experimental results in this work. Rate of production analysis of MH4 indicates that the most significant consumption pathways are H-abstractions. The unimolecular decomposition reactions by the breakages of C C bonds are also important pathways in MH4 consumption. The pyrolysis product distributions of 4-methylheptane, 3-methylheptane and 2-methylheptane were compared to demonstrate the effect of the methyl side chain position on the pyrolysis of those fuels. It is noted that the mole fraction distributions of the smaller species, including CH 4 , C 2 H 2 and C 2 H 6 , are not sensitive to the position of the methyl side-chain, while those of C3-C5 products, including PC 3 H 4 , C 3 H 6 , C 4 H 6 , IC 4 H 8 , C 5 H 8 1-3 and C 5 H 10 -2, are strongly affected. Novelty and significance statement The products of 4-methylheptane pyrolysis were identified and measured by using the synchrotron ultra-violet photoionization method. A detailed kinetic model of 4-methylheptane pyrolysis at atmospheric was constructed for the first time. The consumption pathways of 4-methylheptane pyrolysis were clarified. The effect of methyl side chain position on fuel pyrolysis was analysed. 4-Methylheptane is one of the important branched alkanes in Fischer–Tropsch synthetic diesel fuel. The present work extends the understanding of pyrolysis of long branched alkanes. The results of the study provide guidance in exploring ideal compositions for diesel alternative fuels.
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JOURNAL OF HAZARDOUS MATERIALS
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2017
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IF 6.065
Rui Luo,Chao Liu,Jiansheng Li,Jing Wang,Xingru Hu,Xiuyun Sun,Jinyou Shen,Weiqing Han,Lianjun Wang
A new catalyst system of CoP/peroxymonosulfate (PMS) is presented, which achieved significant improvement in catalytic activity. Nanostructured CoP, obtained by a simple solid-state reaction, exhibited dramatic catalytic activity with 97.2% degradation of orange II of 100 ppm within 4 min. Moreover, the high efficiency could be reached for other phenolic pollutants, i.e., phenol and 4-chlorophenol. The reaction rate is much higher than the most reported catalysts. Effect of parameters on catalytic activity of the catalyst was studied in detail. Notably, initial pH of the solution had a slight negative effect on the catalytic performance over the pH range 4.07–10.92, suggesting that CoP has the great adaptability of pH. CoP/PMS demonstrated excellent anti-interference performance toward anions (Cl − , NO 3 − , and HCO 3 − ). In addition, the pathway of degradation of orange II is proposed by analyzing its intermediates. Based on the XPS spectra of CoP, the identification of the reactive species ( OH and SO 4 − ) by electron paramagnetic resonance (EPR) analysis and quenching tests, a possible mechanism for activation of PMS by CoP was proposed. Considering the dramatic catalytic activity, a wide range of pH catalyst suited, CoP is believed to provide robust support for the promising industrial application of AOPs.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2025
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IF 4.6
Le-Yu Huang,Huiling Wang,Yue-Yang Zhang,Shi-Yu Liu
Due to increasing threats to global public health and widespread environmental pollution issues caused by improper and excessive application of pesticides, the detection of pesticide residues is important in securing food safety and responding to public health. However, conventional methods for pesticide residues detection were usually labor- and time-consuming, making the acquisition of efficient tools for rapid and sensitive detection of pesticide residues an urgent need. Enzyme-targeted organic fluorescent probes, which displayed high simplicity and sensitivity, have shown great potential in enzyme inhibition-based pesticide residues detection and related bioimaging. Among these, fluorescent probes-based biosensors for pesticide targeted serine hydrolyses such as carboxylesterases and cholinesterases have been widely developed. Acylaminoacyl-peptidase hydrolase (APEH), a serine hydrolase with typical α/β fold structure, is a promising protein target for pesticides such as organophosphorus (OPs) and carbamate. However, no fluorescent probe targeting APEH has been reported for pesticide detection or related research. To address this, an enzyme-activated fluorescent probe (named as RH-AcA ) with high sensitivity (limit of detection = 3.7 mU/mL), binding affinity ( K m = 6.49 ± 0.29 μM) and high specificity toward APEH was constructed whilst inhibitory efficacy of different pesticides toward APEH in living cells and zebrafish was first visualized. Most importantly, APEH-inhibition-based pesticide residues detection was first achieved using RH-AcA , revealing significantly higher detection sensitivity toward OPs compared to esterase-based fluorescent probes This demonstrated APEH is a promising non-esterase target for enzyme-inhibition-based pesticide residues detection, and RH-AcA could serve as an ultrasensitive and practical tool for pesticides detection and related bioimaging.
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CHEMOSPHERE
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2019
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IF 5.108
Lishuang Hu,Chunyu Guang,Yang Liu,Zengqiang Su,Shida Gong,Yajing Yao,Yanping Wang
Magnetic lignosulfonate functional materials that were known to remove several types of dye from water effectively were prepared. The surface of an iron (II,III) oxide (Fe 3 O 4 ) sample was coated with a layer of organic carbon , and magnetic lignosulfonate (FCS) was synthesised by a crosslinking agent. The morphology, structure, stability and magnetic properties of the materials were characterised by various testing methods. Under experimental conditions, the solution’s acidity, alkalinity, contact time, temperature, desorption and dye concentration were measured. The experimental results show that the material reached the highest adsorption capacity at pH = 7. In addition, the adsorption data was similar to that of a single layer, Langmuir adsorption model. The maximum adsorption capacities were 198.24 mg g −1 (Congo Red) and 192.51 mg g −1 (Titan Yellow), respectively. Based on its desorption performance, the material had good recyclability . Therefore, these studies could be used in wastewater treatment . Hopefully, the proposed magnetic composites will inspire more scholars to investigate solutions to the problem of contaminated water resources.
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POLYMER BULLETIN
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2024
·Vol. 81
·期 13
·11421-11457
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IF 3.1
Shekhar Navin,Mondal Abhijit
Polylactic acid (PLA), a highly promising biodegradable biopolymer, has been extensively studied over the last two decades. The thermoplastic polyester PLA is bio-based, compostable, and eco-friendly. Its monomer, lactic acid, is fermented from renewable plant sources like starch and sugar. Therefore, PLA is regarded as a desirable substitute for conventional petroleum-based polymers. Because of its biocompatible and biodegradable properties, U.S. FDA (Food and Drug Administration) has approved PLA as a biomedical material. PLA has excellent mechanical, physical, structural, and thermal properties, making it suitable for various applications. However, PLA has limitations such as low impact toughness, hydrophobicity, and slow degradation rate at ambient temperatures. This can be improved by different modification methods, such as copolymerization, making composites or blends of PLA with other biodegradable polymers, or incorporating additives. This review presents information about the various methods of synthesis of PLA, its properties, and the environmental degradation of PLA. In addition, the different processing techniques of PLA are also reviewed. Lastly, the applications of PLA in sectors such as packaging, biomedical, agricultural, automotive, and textile are also discussed. Graphical Abstract
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ACS Materials Letters
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2021
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IF 8.312
Jiaxue Zhang,Qianying Lu,Yanyan Li,Tingyu Li,Ming-Hui Lu,Yan-Feng Chen,Desheng Kong
Stretchable optoelectronics represent an emerging technology featuring soft mechanical properties. The advancements in this active area rely on the development of compliant electronic materials. Currently, the deformable forms of light-emitting devices often exhibit double-side emissions due to the lack of stretchable reflective electrodes. This study reports a facile procedure to deposit smooth and uniform liquid metal films over large-area elastomeric substrates as stretchable reflective electrodes. The as-prepared electrodes exhibit low sheet resistance (0.15 Ω sq–1), high optical reflectance (95% at 550 nm), and ultrahigh deformability (500% strain). The electrode shows sufficient durability to survive repetitive tensile deformations. Successful implementation of a liquid metal electrode in a stretchable light-emitting device achieves single-side emission with enhanced light extraction. The stretchable reflective electrode reported here represents a key building component to enable a broad range of applications such as deformable lighting, wearable displays, and soft robotics.
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MICROCHIMICA ACTA
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2022
·Vol. 189
·期 1
·1-9
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IF 6.408
Ma Enhui,Wang Ke,Wang Hong
An immunoassay strategy has been developed based on nanomotor-assisted electrochemical measurements for simple and sensitive detection of immunoglobulin (IgG). The self-propelled Fe 3 O 4 @SiO 2 /Pt nanomotors were designed to label primary antibodies IgG (nanomotor-label) for the “on-the-fly” binding of the immune-protein. The core shell Au@Ag nanocubes (Au@Ag NCs) were used as labels of secondary antibodies (Au@Ag NCs-Ab 2 ) to amplify electrochemical signal related to antigen concentration derived from the oxidation of Ag. The self-propelled nanomotors autonomously move in the solution to cruise and capture IgG and Au@Ag NCs-Ab 2 , resulting in the self-assembly of sandwich immune-complex. Finally, the immune-complex with magnetism can be transferred and modified on the electrode for the detection of IgG via differential pulse voltammetry. The self-propelled motion of the nanomotor-label obviates common procedures for the self-assembly of sandwich immunosensors to achieve satisfactory analysis results. With advantages of automation and miniaturization, the strategy based on self-propelled nanomotor-labels explores an effective method for the simple and sensitive detection of immune-protein in biosensing. Graphical abstract
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ACS Applied Energy Materials
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2022
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IF 6.959
Tianchen Xia,Tiantian Zhu,Yingchun Miao,Xiangyu Zhao
Organic molecules such as viologens with a nitrogen redox center show promise as efficient anion storage materials in rechargeable batteries. However, the high solubility of viologens in liquid electrolytes limits their wide electrochemical application. Herein, an insoluble polymerized polyxylylviologen chloride (PXVCl2) is first developed as a chloride ion storage electrode in chloride ion batteries. The as-prepared PXVCl2 electrode exhibits a competitive discharge capacity of 140 mA h g–1 (86% of the theoretical discharge capacity) compared to that of the previously reported organic conducting polymer electrodes. The incorporation of graphene in the PXVCl2 material achieves significant improvements in reaction reversibility and rate capability of the PXVCl2 electrode. Importantly, the nitrogen redox reactions based on chloride ion transfer of the PXVCl2 electrode are demonstrated.
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Laser & Photonics Reviews
·
2023
·Vol. 17
·期 12
·2300427
·
IF 11
Na Lin,Ri-Cheng Wang,Shao-Ya Zhang,Zi-Han Lin,Xing-Yu Chen,Zi-Ning Li,Xiao-Wu Lei,Yu-Yin Wang,Cheng-Yang Yue
Despite the extraordinary X-ray scintillation performance of three-dimensional (3D) lead perovskite nanocrystals (PNCs), the serious biotoxicity of Pb 2+ and luminescent instability in water remain insurmountable obstacles for their applications in medical imaging. To address these drawbacks, herein, the study demonstrates one new lead-free zero-dimensional (0D) hybrid cuprous halide of single-crystalline [BzTPP] 2 Cu 2 I 4 (BzTPP = Benzyltriphenylphosphonium) as a satisfactory X-ray scintillator. [BzTPP] 2 Cu 2 I 4 displays broadband yellowish-green light emission with a high photoluminescent quantum yield (PLQY) of 44.2% and large Stokes shift of 167 nm upon UV light excitation. High PLQY and negligible self-absorption enable [BzTPP] 2 Cu 2 I 4 to display impressive scintillation performance excited by X-ray with a light yield of 27 706 photons MeV -1 and low detection limit of 0.352 µ Gy s −1 , surpassing typical 3D PNCs. More importantly, [BzTPP] 2 Cu 2 I 4 represents extraordinary structural and luminescent stability in water for at least one month. The excellent and stable radioluminescence performance as well as solution growth method ensure a [BzTPP] 2 Cu 2 I 4 -based screen for fine-resolution X-ray imaging with potential in radiography and inspection. This work highlights the multiple merits of low-toxicity and cost, high light yield, and long-term water-stability of 0D hybrid cuprous halides as highly desirable X-ray scintillators.
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