JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Jine Wang,Rui Zhao,Zhe Cheng,Pei Wang,Meihua Jin,Jiujun Xu
As a kind of natural polyphenolic antioxidants, tannic acid (TA) has a wide range of sources and biosafety, excellent antibacterial properties and its special chemical structure makes it easy to bind to the surface, which may provide inspiration for the development of antifouling materials. In this paper, a TA-based antifouling coating was designed and prepared. A stable intermediate transition layer was formed by co-deposited 3,4-dihydroxy phenyl-L-alanine (DOPA) and polyethyleneimine (PEI) on the surface of polyvinyl chloride (PVC), and then TA molecules were grafted on the surface to prepare a TA functionalized (PVC/(PDA/PEI)-TA) coating. The effect of the coating on the adhesion of marine bacteria, benthic diatoms and mussels was investigated. The results indicated that the coating had good antifouling performance. Marine bacteria and benthic diatoms had a low adhesion rate on the coating surface and were prone to the detachment under water flow erosion. The TA on the coating surface affected the adhesion behavior of mussels, which only secreted a small amount of adhesive plaques on the surface, and the adhesion force between the plaques and the substrate became low. This study may provide new solutions to marine biofouling.
研究领域:
材料科学
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海洋生物学
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DOI
高影响因子
Journal of Physical Chemistry C
·
2020
·
IF 4.189
Shuhua Zhang,Weigen Chen,Haiyang Shi,Weiran Zhou,Jiayi Zhang
The application of surface-enhanced Raman scattering (SERS) to detect methanol dissolved in transformer oil is one of the most promising online monitoring techniques for evaluating the transformer aging process. In this work, a microscopic cluster of methanol molecules was obtained by combining experiments and methanol molecular simulations, and the vibrational assignments of methanol Raman peaks were determined. A methanol–Ag19 complex was constructed, and the effect of an applied electric field on the charge transfer effect of the complex was analyzed. Applying an electric field will cause the relative position of methanol molecules in the complex to rotate, thereby changing the amount of charge transfer and the polarizability and resulting in charge redistribution and a Raman intensity change. Specifying the electric field strength can enhance or suppress the intensity of the Raman peak caused by the C–O stretching vibration in methanol molecules. Our research strengthens the understanding of the methanol microstructure and the charge transfer effect of an applied electric field on a SERS of a methanol molecule. This is of great importance for monitoring transformer aging with SERS.
研究领域:
光谱学
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物理化学
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材料科学
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电气工程
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纳米技术
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DOI
高影响因子
PLoS Pathogens
·
2026
·Vol. 22
·期 6
·e1013865
·
IF 4.9
Lin Zhao,Jiawen Fu,Swaroop Peddiraju,Heming Chen,Keqin Huang,Ying Zhang,Nishith Gupta,Qian Jiang,Honglin Jia
All alveolates including apicomplexan parasites contain an inner membrane complex (IMC) underneath the plasma membrane. The IMC is synthesized de novo during asexual replication (including endodyogeny, endopolygeny, and schizogony) and serves as a crucial scaffold for supporting cytoskeletal structures and the glideosome machinery for parasite locomotion. However, the mechanism(s) underlying the membrane biogenesis in the IMC are not well understood. Using a clinically-relevant and globally-prevalent pathogenic protist model, Toxoplasma gondii , we identified the TgVPS13A bridging the IMC to the endoplasmic reticulum (ER) – the major site of phospholipid synthesis. The multi-modular TgVPS13A plays a crucial role in the IMC biogenesis, functioning in concert with an ER-resident VAP protein (TgVAP) and a novel lipid scramblase (TgDAT1). TgDAT1 is recruited for the progeny formation sites during the early stages of budding. Conditional depletion of TgVPS13A, TgDAT1 or TgVAP results in collapse of the inner membrane complex, leading to parasite death, as visualized by endodyogeny-specific organelle markers. GFP-Lact-C2, a biosensor of phosphatidylserine and phosphatidylthreonine lipids made in the ER and enriched in the IMC, also mislocalizes upon protein depletion. In conclusion, we propose that TgVPS13A, together with TgVAP and TgDAT1, bridge the ER and IMC and mediate the inter-organelle transport of lipids, thus contributing to the organelle biogenesis and daughter budding in T. gondii.
The inner membrane complex (IMC) in apicomplexan parasites is essential for maintaining the structural stability of the parasite, as well as for its budding and motility. The IMC is composed of flattened vesicles, alveolins, and microtubules. However, the mechanism behind the biogenesis of these flattened vesicles remains unclear. In this study, we provide evidence that a bridge-like protein TgVPS13A, together with TgVAP and TgDAT1 drive the biogenesis of the IMC alveoli. Phenotypic analysis indicates that the absence of any individual of these proteins disrupts the biogenesis of daughter IMCs, which in turn affects the budding of daughter parasites. We also demonstrated that TgDAT1 functions as a scramblase. Based on our findings, we propose a model in which the TgVPS13A, functioning in concert with TgVAP and TgDAT1 mediates lipid transport from the ER to the nascent IMC to drive the expansion of the IMC membrane and the budding of daughter parasites in T. gondii . Furthermore, TgDAT1 may facilitate the transfer of lipids from the outer leaflet to the inner leaflet of the IMC sacs, promoting a balanced composition of the IMC membrane components.
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DOI
PubMed
高影响因子
Inorganic Chemistry Frontiers
·
2022
·Vol. 10
·期 2
·435-442
·
IF 7.779
Kai Li,Huang Ye,Xiaoqi Li,Xinqiang Wang,Junhua Luo,Xitao Liu
Recently, impressive progress has been achieved on a new and brilliant scheme for a solid-state quadratic nonlinear optical (NLO) switch, which holds enormous potential for developing next-generation intelligent optoelectronic devices. However, most of them are still restricted by their poor switching capability and low operating temperature. Herein, we present a rational design approach for developing a highly efficient hybrid halide NLO switching material through introducing conjugated aromatic Schiff base cations. As expected, an organic–inorganic hybrid halide compound (C10H14N)PbBr3 (1, C10H14N is N-propylbenzylideneaminium) has been developed, which exhibits highly efficient modulation of the quadratic NLO property (1.05 times that of KH2PO4) and a high phase transition temperature of 411 K. Besides, the second harmonic generation (SHG) powder test demonstrates that this material is phase matchable. Microscopic single-crystal structure analysis combined with theoretical calculations reveals that the high-performance NLO switching behaviour of 1 originates from the reversible ordered/disordered transformation of the aromatic Schiff base N-propylbenzylideneaminium cations accompanied by the re-orientation of the inorganic [PbBr3]∞ framework. More importantly, further investigations show that the conjugated effect of the Schiff base cations makes important contributions to the NLO properties of 1. This work opens up a new route for designing highly efficient quadratic NLO switches and provides a promising way to further develop high-performance solid-state phase transition materials (e.g. ferroelectrics) and intelligent optoelectronic devices.
研究领域:
材料科学
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非线性光学
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智能光电子器件
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DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2020
·
IF 3.99
Shiqi Weng,Ming Jin,Decheng Wan
A facile way to fabricate a pH-stable, durable, and porous material with active amines (NHx, x= 1,2)-derived diol groups on a pore surface is reported. Branched polyethyleneimine (PEI) in water forms a supramolecular complex with sodium dodecyl benzene sulfonate (SDBS), and this complex acts as an emulsifier . For the microcrystal cellulose (MC)-dispersed aqueous solution of PEI, SDBS is charged to turn the mixture into a medium internal phase air–in–water (A/W) emulsion upon oscillation. The emulsion is solidified by the partial crosslinking of PEI with polyethylene glycol diglycidyl ether (0.2 eq. of PEI NH groups) and further developed into an open-cellular monolith by removing the SDBS and water in the system. Under optimized conditions [pH 10, PEI at 20 % in water, and MC/PEI (50 % mass ratio)], the porous monolith (MC@PEI) shows a specific surface area of up to 14.9 m 2 g −1 . The amino groups are easily transformed into diols by treating with glycidol , and the resulting MC@PEI-diol can act as a scavenger to extract the trace boric acid in water. The adsorption follows the Langmuir model and shows chemical adsorption character with a boron-loading capacity of up to 2.68 mmol g −1 . Presaturing the scavenger with anionic dyes (488 mg g −1 ) exerts limited impact on the loading ability of BA. Additionally, the scavenger combines chemical stability in the absence of pH-labile bonds and mechanical durability for the composite structure with rigid MC skeleton and flexible PEI muscle.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
RSC Advances
·
2021
·Vol. 11
·期 10
·5506-5511
·
IF 3.361
Lin Yuan,Qiang Fu,Maojuan Zhou,Yunqian Ma,Lihua Zang,Yingjian Qin,Dandan Ji,Fengshan Zhang
Polychlorinated biphenyls (PCBs) are synthetic organic compounds that are extremely difficult to break down in water and can accumulate in human fat and organisms. However, methods that can be used to detect large amounts of PCBs remain unsatisfactory, as they are generally overly sensitive and involve complex operations. An aptamer-based catalytic hairpin assembly (aptamer-CHA) reaction for the selective detection of 3,3′,4,4′-tetrachlorobiphenyl (PCB 77) was developed. It combines the advantages of aptamers and signal amplification reactions. The aptamer selectivity recognizes the target, PCB 77, which triggers the sensitive CHA reaction to produce a fluorescence signal. CHA is a sensitive enzyme-free signal amplification method suitable for on-site detection. Therefore, the identification aptamer is the basis for the quantitative detection of PCB 77, with a detection range of 0.01 μg L−1 to 500 μg L−1 and a detection limit of 0.01 μg L−1. In this study, the aptamer was used to improve the selectivity of the reaction, and the CHA reaction improved the sensitivity of the detection system. Such high-sensitivity PCB detection capabilities with simplified procedures may be useful for real-time field detection and other monitoring tasks. This method can be used as a rapid fluorescence detection strategy for other targets in aquatic environments.
研究领域:
环境科学
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分析化学
·
分子生物学
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DOI
PubMed
高影响因子
MICROCHIMICA ACTA
·
2018
·Vol. 185
·期 9
·1-9
·
IF 5.705
Liu Chao,Dong Jing,Ning Shixue,Hou Juying,Waterhouse Geoffrey I. N.,Cheng Ziqiang,Ai Shiyun
A novel sandwich-type electrochemical immunosensor for avian leukosis virus subgroup J (ALV-J) is described. The immunosensor was prepared by first modifying a glassy carbon electrode (GCE) with reduced graphene oxide that was functionalized with tannic acid and magnetite nanoparticles (rGO-TA-Fe 3 O 4 ). Primary antibodies (Ab 1 ) were then deposited on the modified GCE. Hollow zeolitic imidazolate framework (eZIF) crystals functionalized with tannic acid and carrying secondary antibodies (Ab 2 ) and horseradish peroxidase (HRP) were used for signal amplification. The hollow eZIF crystals were found to be an excellent carrier for both Ab 2 and HRP, prompting the wider use of metal organic frameworks in electrochemical sensing. Under optimal conditions, the immunoassay afforded a detection range from 152 to 10,000 TCID 50 mL −1 (where TCID 50 is the 50% tissue culture infective dose) and a low detection limit of 140 TCID 50 mL −1 (at S/ N = 3). The immunoassay is highly selective for ALV-J, and it demonstrates excellent reproducibility and operational stability. The practicability of the immunoassay for the fast detection of ALV-J was confirmed in experiments with spiked avian serum samples.
Schematic of a sandwich-type electrochemical immunosensor for avian leukosis virus subgroup J (ALV-J). It consists of reduced graphene oxide, tannic acid and magnetite as the sensing platform, and an etched zeolitic imidazolate framework carrying horseradish peroxidase for signal amplification.
研究领域:
生物医学工程
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病毒学
·
分析化学
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产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2016
·Vol. 4
·期 30
·11897-11907
·
IF 8.262
Hualin Jiang,Weibo Zhang,Pinghua Chen,Weiwei Zhang,Guoyao Wang,Xubiao Luo,Shenglian Luo
A novel composite that can simultaneously detect and remove heavy metals was prepared in this study. Its adsorption ability rivals that of excellent traditional adsorbents; furthermore, it can change the color to identify the adsorbate and its concentration. The color changes are very easy to detect via the naked eye or with a photometer. This novel adsorbent can remove a large amount of heavy metal ions, and also qualitatively and quantitatively detect heavy metal ions in water. Cu(II) and Fe(II) were used to investigate the detection and removal properties of the composite, and SEM, BET, FTIR, zeta potential and XPS were used to physicochemically characterize it. Batch sorption experiments were conducted to study the effects of various factors such as pH, the presence of coexisting metal ions, the contact time and the initial metal concentration. The studies indicated that the adsorption process fits well to the Langmuir model, and the kinetic data could be described very well by the pseudo-second-order kinetic model. The mechanism of adsorption has been discussed in detail. This study provides a simple method for the preparation of smart adsorbents.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 74
·69855-69860
·
IF 3.289
Baohuai Zhao,Rui Ran,Li Sun,Xingguo Guo,Xiaodong Wu,Duan Weng
The perovskite oxides LaMnO3+δ were prepared by a citrate method and then etched by acid solution with different times. After etching, the perovskite structures of all the catalysts remained, the surface area enlarged apparently, and the NO catalytic oxidation activities were obviously promoted by increasing the etching time. Long-term experiments revealed the acceptable stability of the etched catalysts. The favorable activities of the etched LaMnO3+δ catalysts were mainly due to their high specific surface area, abundant activated oxygen species and vacancies, as well as the higher valence state of Mn ions resulting from the loss of La3+ in the perovskite structure.
研究领域:
材料科学
·
环境催化
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产品关联
DOI
高影响因子
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
·
2018
·Vol. 2018
·期 35
·3952-3959
·
IF 2.507
Miaomiao Liu,Zhenyuan Ji,Xiaoping Shen,Hu Zhou,Jun Zhu,Xulan Xie,Chunsen Song,Xuli Miao,Lirong Kong,Guoxing Zhu
Graphical The 3D-rGO-CeO 2 composite based on three-dimensional rGO and CeO 2 hollow microspheres was successfully synthesized by a hydrothermal self-assembly approach, which showed an enhanced electrocatalytic performance for a hydrogen evolution reaction in an alkaline medium. Transition metal oxides (TMO) are promising candidates for low-cost and high-efficiency catalysts for the hydrogen evolution reaction (HER). However, the low conductivity and severe agglomeration of catalyst particles hinder their practical application. Herein, we report an effective HER electrocatalyst of 3D-rGO-CeO 2 with three-dimensional reduced graphene oxide (3D-rGO) decorated with CeO 2 hollow microspheres through a hydrothermal self-assembly approach. It is shown that the CeO 2 hollow microspheres with an average size of ca. 680 nm are uniformly encapsulated within the porous structure of 3D-rGO. Compared with bare CeO 2 hollow microspheres, the 3D-rGO-CeO 2 composite exhibits remarkably enhanced electrocatalytic activity for HER with a relatively low onset overpotential of 192 mV, a smaller overpotential of 0.34 V at the current density of 10 mA cm –2 , and a modest Tafel slope of 112.8 mV decade –1 in a 1 m KOH solution. The enhanced performance of 3D-rGO-CeO 2 can be ascribed to the introduction of 3D rGO in the composite, which provides a highly conductive network for rapid charge-carrier transmission, and rich porous structures for the easy access of the electrolyte to the catalyst during the HER process.
研究领域:
材料科学
·
电化学
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DOI
高影响因子
Journal of Materials Chemistry A
·
2015
·Vol. 3
·期 47
·23788-23798
·
IF 7.443
Bo Li,Chiyao Bai,Shuang Zhang,Xiaosheng Zhao,Yang Li,Lei Wang,Kuan Ding,Xi Shu,Shoujian Li,Lijian Ma
On the basis of the unusual coordination structure of UO22+ combined with the adaptive nature of supramolecular organic frameworks (SOFs), here we have designed and prepared a novel SOF-based solid phase extraction adsorbent (MA–TMA) using N-donor-containing melamine (MA) and O-donor-containing trimesic acid (TMA) as bifunctional building blocks mutually linked via hydrogen bonds. The as-prepared MA–TMA, with a rich N-/N- and N-/O-heterocyclic structure throughout its framework, provides an accessible coordination geometry and/or ligand environment for the uranyl ion, which builds the crucial structural basis for the pre-organized adaptive frameworks closely related to the “induced-fit” and selective recognition of uranyl ions. The main results are as follows: (1) the highest selectivity of 92%, so far unreported, and a considerable capacity of 324 mg g−1 for uranium adsorption by MA–TMA are observed in weak acidic multi-cation solution (pH 2.5), accompanied by a distribution coefficient Kd value of 16 000 mL g−1, 100-fold or more over other 11 competitive cations; (2) MA–TMA could reach its limiting saturation capacity of 1028 mg g−1 at pH 4.5 in pure-U(VI) solution; (3) noteworthily, the morphology of MA–TMA changed from a ribbon-like structure with a nano-diameter before adsorption into aggregated granules with a size of tens of microns after adsorption, which would be much more favorable for subsequent solid–liquid separation. Furthermore, possible mechanisms for the selective recognition of uranyl ions and the morphological changes of MA–TMA after adsorption are explored based on experimental characterization and chemical rationale.
研究领域:
化学
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材料科学
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环境科学
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产品关联
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 31
·25877-25881
·
IF 3.289
Ling Li,Mingkun Wang,Ning Cui,Yuedi Ding,Qingling Feng,Wenming Zhang,Xiaowei Li
Incorporation of nanophase ceria into the cathode catalyst Pt/C was used as alternative cathode catalysts for the oxygen reduction reaction in an air-cathode single-chamber microbial fuel cell (SCMFC) for the first time. Electrochemical results reveal that the ceria doped Pt/C catalysts exhibited a higher catalytic performance than the pure Pt/C catalyst. The highest voltage of 580 mV and the maximum power density of 840 ± 24 mW m−2 were achieved from the 3 wt% CeO2 doped Pt/C cathode, which was larger than that of the pure Pt/C cathode.
研究领域:
环境科学
·
电化学
·
能源材料
✓ 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）