JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2022
·
IF 6.364
Wanli Zhao,HongLi Suo,Shuo Wang,Lin Ma,Lei Wang,Qiuliang Wang,Zili Zhang
MgB 2 superconductor pellets were synthesized through Mg gas infiltration method using nanosized- and microsized B powders. There was a marked difference in the superconducting properties of the two samples, particularly in the pinning force and dominant pinning mechanism. The microstructures of the samples were observed using HR-TEM and STEM-HAADF, and the results showed that the primary reason for the difference in the superconducting properties is the distribution of the nanosized second-phase particle MgO. Additionally, a feasible reaction model for the Mg gas infiltration method was established. Compared to the Mg liquid infiltration method, the gas infiltration showed better penetrability ability with a small amount of residual Mg. This study presents a novel synthesis process to fabricate an MgB 2 pellet with superior density and superconducting properties. This method can be used in multiple applications such as superconducting bearings, compact superconductor magnets, and magnetic shielding.
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高影响因子
LANGMUIR
·
2014
·
IF 4.384
Zheng Wang,Ting Yu,Pei Nian,Qingchun Zhang,Junkang Yao,Shan Li,Zuoning Gao,Xianglong Yue
sec-Butanol-modified rounded-coffin-shaped silicalite-1 (SL) microcrystals were assembled into a compact and highly b-oriented monolayer extending over the centimeter scale via the Langmuir–Blodgett (LB) technique. For comparison, methanol- or ethanol-modified SL microcrystals could not float and were compressed into a dense film in an LB trough. Subsequently, highly b-oriented MFI films with a thickness of ∼1.5 μm were successfully obtained on the solid substrates by secondary growth of the LB monolayer using tetrapropylammonium hydroxide (TPAOH) as the structure-directing agent. The electrochemical experiments confirmed that the prepared films were defect-free. In general, the LB method is a highly controllable and reproducible method of organizing anisotropic zeolite crystals with a preferred orientation over a relatively large surface area. The LB technique could be further applied as an effective platform for the oriented assembly of different types of zeolite particles and the growth of variously oriented zeolite films.
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高影响因子
COLLOID AND POLYMER SCIENCE
·
2014
·Vol. 292
·期 9
·2071-2082
·
IF 2.41
Fu Yutong,Xia Xinyu,Zhang Yan,Ye Jinhai,Lang Meidong
Functional star-shaped 4-arm poly(ethylene glycol)- b -poly[( ε -caprolactone- co - γ -amino- ε -caprolactone)] (4-arm PEG- b -P(CL- co -ACL) was synthesized through ring-opening polymerization. The structure of the copolymer was confirmed by 1 H NMR, Fourier transform infrared spectroscopy (FTIR), and gel permeation chromatography (GPC). To further understand the copolymers, the difference of the conversion rate between ε -caprolactone (CL) and γ -(carbamic acid benzyl ester)- ε -caprolactone (CABCL) and the detailed deprotection condition were studied. The thermal property of the copolymer was analyzed by WAXR and differential scanning calorimetry (DSC), which demonstrated that the thermal property could be well adjusted. The pH-responsive behavior of the copolymers was studied in detail by dynamic light scattering (DLS), pH titration, and pyrene fluorescence methods, which indicated that it could form micelles and exhibit pH responsibility. Moreover, the copolymer was nontoxic and had good biocompatibility according to the results by 3-(4,5)-dimethylthiahiazo (-z-y1)-3,5-di-phenytetrazoliumromide (MTT) assay.
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Toxins
·
2024
·Vol. 16
·期 11
·494
·
IF 3.9
Chenying Yang,Li Ding,Qiyi He,Xiya Chen,Haiting Zhu,Feng Chen,Wanzhou Yang,Yuexin Pan,Zhiyuan Tai,Wenhao Zhang,Zeyuan Yu,Zening Chen,Xiaodong Yu
Kraits are venomous snakes of the genusBungarusfrom the familyElapidae. Their venom typically demonstrates neurotoxicity; however, the toxicity is significantly influenced by the snake’s species and geographical origin. Among theBungarusspecies,Bungarus suzhenaeandB. bungaroideshave been poorly studied, with little to no information available regarding their venom composition. In this study, a proteomic approach was employed using LC-MS/MS to identify proteins from trypsin-digested peptides. The analysis revealed 102 venom-related proteins from 18 distinct functional protein families in the venom ofB. suzhenae, with the primary components being three-finger toxins (3-FTx, 25.84%), phospholipase A2(PLA2, 40.29%), L-amino acid oxidase (LAAO, 10.33%), Kunitz-type serine protease inhibitors (KUN, 9.48%), and snake venom metalloproteinases (SVMPs, 6.13%). In the venom ofB. bungaroides, 99 proteins from 17 families were identified, with primary components being 3-FTx (33.87%), PLA2(37.91%), LAAO (4.21%), and KUN (16.60%). Enzymatic activity assays confirmed the presence of key venom enzymes. Additionally, the LD50 values forB. suzhenaeandB. bungaroideswere 0.0133 μg/g and 0.752 μg/g, respectively, providing a reference for toxicity studies of these two species. This research elucidates the proteomic differences in the venoms of these two species, offering a foundation for developing antivenoms and clinical treatments for envenomation.
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SURFACE & COATINGS TECHNOLOGY
·
2015
·
IF 1.998
Wang Peng,Zhou Shanbao,Zhang Xinghong,Gui Kaixuan,Li Yongxia,An Jiadong,Han Wenbo
To protect graphite matrix from oxidation , B modified ZrB 2 –SiC coatings were prepared on SiC coated graphite by a two-step pack cementation . The microstructure, thermal cycling and oxidation resistant properties of the coatings were studied. The results show that the as-prepared coatings were mainly composed of SiC, ZrB 2 and Si. ZS50-1B, ZS50-3B and ZS50-5B showed good thermal cycling resistance with 97.4%, 98.2% and 98.6% weight retention after 15 thermal cycles between 1500 °C and room temperature. ZS50-7B and ZS50-9B showed good oxidation resistance with 93.5% and 97.5% weight retention after 19 h oxidation at 1500 °C.
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高影响因子
Polymers
·
2020
·Vol. 12
·期 11
·2482
·
IF 3.426
Fei Song,Zhidan Wang,Wenli Gao,Yu Fu,Qingrong Wu,Shouxin Liu
Novel temperature/reduction dual stimulus-responsive triblock copolymers, poly [2-(2-methoxyethoxy) ethyl methacrylate-co-oligo (ethylene glycol) methacrylate]-b-(L-polylactic acid)-SS-b-(L-polylactic acid)-b-poly[2-(2-methoxyethoxy) ethyl methacrylate-co-oligo(ethylene glycol)methacrylate] [P(MEO2MA-co-OEGMA)-b-PLLA-SS-PLLA-b-P(MEO2MA-co-OEGMA)] (SPMO), were synthesized by ring opening polymerization (ROP) of L-lactide and 2,2’-dithio diethanol (SS-DOH), and random copolymerization of MEO2MA and OEGMA monomers via atom transfer radical polymerization (ATRP) technology. The chemical structures and compositions of the novel copolymers were demonstrated by proton nuclear magnetic resonance (1H NMR) and Fourier transform infrared spectroscopy (FTIR). The molecular weights of the novel copolymers were measured by size exclusive chromatography (SEC) and proved to have a relatively narrow molecular weight distribution coefficient (ÐM ≤ 1.50). The water solubility and transmittance of the novel copolymers were tested via visual observation and UV–Vis spectroscopy, which proved the SPMO had a good hydrophilicity and suitable low critical solution temperature (LCST). The critical micelle concentration (CMC) of the novel polymeric micelles were determined using surface tension method and fluorescent probe technology. The particle size and morphology of the novel polymeric micelles were characterized by dynamic light scattering (DLS) and transmission electron microscopy (TEM). The sol–gel transition behavior of the novel copolymers was studied via vial flip experiments. Finally, the hydrophobic anticancer drug doxorubicin (DOX) was used to study the in vitro release behavior of the novel drug-loaded micelles. The results show that the novel polymeric micelles are expected to become a favorable drug carrier. In addition, they exhibit reductive responsiveness to the small molecule reducing agent dithiothreitol (DTT) and temperature responsiveness with temperature changes.Keywords:temperature/reductive dual-stimulus responsiveness;block copolymers;amphiphilic;ring-opening polymerization;atom transfer radical polymerization
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DOI
PubMed
高影响因子
EUROPEAN POLYMER JOURNAL
·
2014
·
IF 3.242
Ting-Ting Xu,Jun Zhu,Cong Yuan,Qian-Li Yang,Kun Cui,Chun-Hui Li,Liu-He Wei,Zhi Ma
A series of new polymethylene- b -poly(styrene- co -2-hydroxyethyl methacrylate) (PM- b -P(St- co -HEMA)) and polymethylene- b -poly(styrene- co -2-hydroxyethyl methacrylate- g -poly(ε-caprolactone)) (PM- b -P(St- co -HEMA- g -PCL)) copolymers were successfully synthesized via a strategy combined polyhomologation of ylides, reversible addition–fragmentation chain transfer (RAFT) polymerization and ring-opening polymerization (ROP). Firstly, a hydroxyl terminated polymethylene (PM-OH) was obtained via polyhomologation of ylides followed by oxidation. Then, PM-OH was transformed to a macromolecular chain transfer agent (PM-CTA). Subsequently, RAFT copolymerizations of styrene (St) and 2-hydroxyethyl methacrylate (HEMA) were performed using PM-CTA as chain transfer agent, targeting the well-defined PM- b -P(St- co -HEMA) copolymers with controllable molecular weight and narrow molecular weight distribution. Finally, the ring-opening polymerization of ε-caprolactone was carried out using PM- b -P(St- co -HEMA) copolymer as initiator to achieve PM- b -P(St- co -HEMA- g -PCL) copolymer. The molecular weight and chain structure of the obtained copolymers were characterized by gel permeation chromatography (GPC), proton nuclear magnetic resonance ( 1 H NMR) and Fourier Transform Infrared spectroscopy (FTIR). Moreover, the fabrication of highly ordered porous films using the amphiphilic PM- b -P(St- co -HEMA) copolymers via a static breath-figure process was investigated.
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高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2015
·
IF 7.435
Peng Yi-Zhu,Ma Wan-Hong,Jia Man-Ke,Zhao Xiao-Rong,David M. Johnson,Huang Ying-Ping
In this study, a weakly polar pesticide acetochlor in water was tried to degrade by BiOBr catalysts under visible light irradiation. Its degradation reaction rate increased exponentially with increasing catalyst dosage, which was significantly different from conventional photocatalytic patterns established for polar or water-soluble pollutants. Thus, the rate-dosage relationship of BiOBr/acetochlor was compared to that of BiOBr/Rhodamine B (RhB) (a typical strong polar dye pollutant in water) at different BiOBr dosages. The degradation rate of RhB increased with the BiOBr dosage and then plateaued due to more catalyst particles blocking the light into the inner solution, which is a typical behavior for heterogeneous photocatalysis of polar organic compounds in aqueous solution. While acetochlor behaved differently, its degradation rate increased exponentially with the BiOBr dosage, and no plateau was observed even up to 9.0 g/L BiOBr dosage. This special rate-dose relationship for weakly polar acetochlor was correlated with a unique adsorption property of BiOBr to acetochlor in water solution. There was a re-distribution effect that always exclude excessive acetochlor adsorbed on BiOBr surface regardless either substrates or BiOBr overdose. This finally resulted in every BiOBr particle having enough adsorption sites available for dissolved dioxygen to function thereby accelerate the degradation of weakly polar organic compounds in water.
研究领域:
环境化学
·
光催化
·
水污染控制
·
环境功能材料
·
污染物降解机制
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高影响因子
ELECTROCHIMICA ACTA
·
2012
·
IF 3.832
Hu Qu,Bizhou Lin,Liwen He,Xiaorong Fan,Yi Zhou,Yilin Chen,Bifen Gao
TaWO 6 nanosheet was assembled into multilayer films by a layer-by-layer deposition technology with polyethylenimine as the linker. UV–vis absorption spectra in the assembly process showed a linear enhancement of absorbance at 238 nm per deposition cycle, indicating the successful formation of multilayer composite films, which were converted into polymer-free films by the heat treatment at 400 °C for 2 h. The bandgap energy and flatband potential of TaWO 6 nanosheet were estimated to be 3.48 eV and −0.79 V vs. Ag/AgCl, respectively. The photoelectrocatalytic degradation of Rhodamine B with the TaWO 6 nanosheet electrodes demonstrated that both the oxygen anionic radicals and the dye cationic radical are essential to mineralize the dye under visible-light-driven photocatalytic conditions. It is the first time to investigate the mechanism of photoelectrocatalysis of TaWO 6 nanosheet electrode.
研究领域:
材料科学
·
物理化学
·
环境催化
·
纳米科技
·
能源材料
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DOI
高影响因子
FOOD CONTROL
·
2014
·
IF 2.819
Jingyue Xu,Ying Li,Jiajia Guo,Fei Shen,Yeli Luo,Chunyan Sun
A new fluorescence method for detecting clenbuterol based on gold nanoparticles (AuNPs) and rhodamine B (RB) has been developed. It has been observed that the quenching of fluorescence of RB occurs in the present of AuNPs through the fluorescence resonance energy transfer (FRET). In the presence of clenbuterol , the FRET-based fluorescence of RB and AuNPs would be gradually recovered for the reason that clenbuterol could congregate the AuNPs and inhibit the FRET process . An assay for the determination of clenbuterol has been proposed based on the modulation in FRET efficiency between RB and AuNPs. Under the optimum conditions, the fluorescence recovery efficiency of the assay is proportional to the concentration of clenbuterol. The detection limit in swine feed was calculated to be 0.008 mg/g and the recoveries were in the range of 97%–102%. In short, the proposed method provides advantages such as rapidity, simplicity, low cost and high sensitivity, making it promising for the rapid screening of clenbuterol residues.
研究领域:
分析化学
·
纳米生物技术
·
药物残留检测
·
食品安全
·
分子诊断
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高影响因子
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
·
2026
·
IF 5.9
Min Zhu,Hongyu Cao,Xiaonan Chen,Xuefeng Lu
B-site La doping co-tunes electron-phonon transport in Ba 2 CaMoO 6 double perovskite. • La doping brings distortion, fine grains and dislocations to lower lattice κ. • Aliovalent La doping yields Mo mixed valence vacancies for degeneracy transition. • x = 0.1 sample delivers 68.7% higher ZT than A-site doped materials. This work reports the B-site selective La 3+ doping in the double-perovskite oxide Ba 2 Ca 1-x La x MoO 6-δ (x = 0, 0.05, 0.1, 0.15, 0.2) and its synergistic regulation of phonon and electron transport for thermoelectric optimization. The ceramics were synthesized through a combination of the conventional solid-state reaction and high temperature reduction. XRD, Rietveld refinement, and TEM confirm the presence of a pure cubic Fm-3m phase up to x = 0.15. However, when x = 0.2, it exceeds the solid solubility limit and forms a La-rich secondary phase. The substitution of La 3+ at Ca 2+ sites induces lattice contraction, octahedral tilting, and high-density dislocations, which effectively strengthen phonon scattering and reduce the lattice thermal conductivity. XPS verifies charge compensation through the formation of Mo 6+ /Mo 4+ mixed valence and oxygen vacancies. Electrical transport measurements reveal an n-type semiconducting behavior. La doping increases the carrier concentration and optimizes the weighted mobility, with a semiconductor to degenerate transition occurring at x ≥ 0.15. The x = 0.1 sample achieves the maximum power factor of 45.2 μW m −1 K −2 at 1073 K and the lowest thermal conductivity of 0.93 W m −1 K −1 , resulting in a peak ZT of ∼0.05 at 1073 K, which is improved by 68.7% compared to A-site doped counterparts. These results demonstrate that B-site selective doping enables the synergistic optimization of electrical and thermal transport, providing a new defect engineering strategy for high temperature oxide thermoelectrics.
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高影响因子
AQUACULTURE
·
2026
·
IF 4.4
Weiheng Shi,Yiwen Chai,Jugan Han,Yonglin Cai,Wuxian Fu,Yongya Luo,Yuhua Lin,Jianmin Ye,Liting Wu
Mpeg1, a gene predominantly expressed in macrophages, belongs to the membrane attack complex/perforin (MACPF) superfamily. It serves as a critical pore-forming effector protein, playing a central role in the innate immune system's defense mechanisms against pathogenic invasion. Beyond serving as a macrophage-specific marker, Mpeg1 is also expressed in teleost IgM + B cells, with particularly high levels observed in head kidney (HK) granulocyte-monocyte/macrophage (G-M) gate IgM + plasma-like cells. Although Mpeg1 expression has been identified in teleost IgM + B cells, its specific immunoregulatory role within these cells remains elusive. Here, using the Nile tilapia ( Oreochromis niloticus ) model, we have demonstrated that On Mpeg1 contributes to innate immunity and modulates IgM + B cells, revealing a novel aspect of its function in antimicrobial defense. Our results showed that pathogenic bacterial challenge significantly upregulated On Mpeg1 expression in immune tissues, macrophages, and IgM + B cells. Recombinant On Mpeg1 ((r) On Mpeg1) and its isolated MACPF domain protein demonstrated direct bactericidal activity, with the full-length protein showing superior efficacy. In vivo targeted knockdown of OnMpeg1 increased bacterial loads, dysregulated inflammatory responses and reduced host survival. These effects were rescued by supplementation with (r) On Mpeg1. Crucially, On Mpeg1 knockdown in HK IgM + B cells severely impaired their intrinsic bactericidal capacity in both lymphoid (L) gate and G-M gate. We concluded that On Mpeg1 is a critical immune effector that not only directly kills pathogens but also potentiates the antimicrobial function of IgM + B cells, revealing a novel role for Mpeg1 in mediating innate bactericidal effector functions of B cells in teleost fish.
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高影响因子
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