JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2025
·Vol. 36
·期 31
·1-11
·
IF 2.8
Li Shanshan,Zhang Duo,Tian Zhongqing,Wang Fei,Meng Fancheng
Ba[(Zn 0.6 Mg 0.4 ) 1/3 Nb (2- x )/3 Sb x /3 ]O 3 (BZMNS, x = 0.15, 0.2, 0.25, 0.3, 0.35) ceramics were synthesized by the conventional solid-state reaction method. The crystal structure and microwave dielectric properties of the ceramics were investigated. X-ray diffraction (XRD) analysis revealed that the BZMNS ceramics exhibit a cubic perovskite structure. The crystal structures were refined, and no secondary phases were detected in all compositions. The doping of Sb 5+ hinders grain growth, and the average grain size first increases and then decreases with the increase of the x value. The dielectric constant shows a downward trend due to the influence of the ionic bond character of B-site ions and the B-site Rattling effect. The packing fraction is the main factor affecting the Q × f value of BZMNS ceramics. As the x value increases, the temperature coefficient of the resonant frequency ( τ f ) gradually decreases. Ion polarizability dilution is the primary mechanism for regulating τ f of BZMNS ceramics. The BZMNS ceramics sintered at 1480 °C with x = 0.3 exhibit optimal microwave dielectric properties ( ε r = 31.44, Q × f = 62,273 GHz (at f₀ = 6.5 GHz), τ f = + 2.48 ppm·°C −1 ), indicating that this ceramic has good application prospects.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Shengkai Sun,Yuan Li,Yusen Chen,Dehong Chen,Yu Yang,Meng Liu,Shaoxiang Li,Binjie Li,Xuan Sun,Sadritdin Turabdjanov,Sardor Donaev,Lei Wang,Bin Li
Volatile organic compounds (VOCs) in the atmosphere pose a critical global challenge due to their detrimental health effects. The ultraviolet (UV)/Fenton-like system has shown promise for VOC degradation. However, maintaining long-term catalytic efficiency by minimizing intermediate byproduct accumulation remains key challenges. In this study, a novel core–shell catalyst is developed which composed of anatase-phase titanium dioxide (TiO 2 ) nanoparticles deposited on titanium silicalite-1 (TS-1) via a Stöber method in an ethanol/ammonia mixture. The TS-1@TiO 2 structure promotes efficient spatial separation of photogenerated electrons and holes under UV irradiation, enhancing the activation of H 2 O 2 to yield highly reactive free radicals ( OH, OOH and O 2 − ) for effective xylene degradation. In a UV/H 2 O 2 bubble reactor, the TS-1@TiO 2 catalyst demonstrates stable xylene degradation efficiency (75 % over 200 min), surpassing the performance of standalone TS-1 (53.2 %) and TiO 2 (62.1 %). This design addresses critical challenges in sustained radical generation and intermediate suppression, offering a robust strategy to improve the longevity and efficiency of UV/H 2 O 2 systems for environmental remediation.
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PubMed
高影响因子
INTERNATIONAL JOURNAL OF DAIRY TECHNOLOGY
·
2025
·Vol. 78
·期 2
·e70015
·
IF 2.8
Yuxin Sun,Hongchao Dai,Wenwen Ge,Dan Xiong,Zhenquan Yang,Zhenbo Xu,Lei Yuan
Foodborne pathogen Bacillus cereus is widely distributed in dairy products and the processing environment. Beyond its threat to human health, the production of thermostable protease also poses a significant challenge to the dairy industry, particularly in pasteurised or ultra-high-temperature (UHT) processed milk products. Despite this, our understanding of dairy spoilage caused by B. cereus is very limited. This study aimed to evaluate the spoilage potential of a thermostable protease produced by B. cereus 12–1 in fluid milk. Specifically, crude protease characterisation, including optimum pH and temperature, the influence of Ca 2+ on enzyme activity and heat stability of protease, was studied. Moreover, the effects of this protease on the quality of both whole and skim UHT milk were evaluated, including zeta potential and particle size of milk, hydrolysis of milk protein, release of free amino acids and change of milk microstructure. This crude protease has relatively good stability at wide-ranging pH values from 5.0 to 10.0 (79.67–166.67 U/mL) and temperatures from 20°C to 70°C (92.67–165 U/mL), and maintained stability of 46.04% and 38.31% after heat treatment by 65°C/30 min or 100°C/10 min. Spoilage patterns in skim and whole UHT milk differ significantly due to variations in fat content. The protease caused protein hydrolysis in whole milk (15.25%) and skim milk (17.09%), effectively hydrolysed κ-casein and β-casein, caused the release of free amino acids (Lys, Val, Tyr, Phe, Ile, Met and Leu) in UHT milk and significantly increased particle size (increase by 940 nm for skim milk and 1319 nm for whole milk), and reduced zeta potential (reduction by 4 mV for skim milk and 3.83 mV for whole milk) of UHT milk. Results indicate the spoilage potential of crude protease from B. cereus and highlight the need to prevent dairy spoilage caused by B. cereus .
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Catalysts
·
2022
·Vol. 12
·期 7
·685
·
IF 4.501
Hao Dong,Cheng-Hua Xu,Fang-Lu Yang,Lei Du,Chen-Long Liu,Wen-Jing Chen,Lin Wang
Ca–Zr–Sn composite oxides catalysts for 1,4-butanediol (BDO) selective dehydration to 3-butene-1-ol (BTO) are synthesized by impregnation and co-precipitation in the present work. The results show that Ca–Zr–Sn catalysts prepared from co-precipitation by using NaOH-Na2CO3mixing alkali solution as precipitant exhibit an excellent catalytic property for BDO dehydration to BTO. For instance, Ca–Zr–Sn oxide with Ca/Zr and Sn/Zr molar ratio of 0.68 and 0.28 calcined at 650 °C gives a BDO conversion and BTO selectivity of about 97% and 82%, respectively, and exhibits no deactivation during 1000 h scale-up experimental testing. X-ray diffraction results indicate that catalytic active centers for BDO dehydration to BTO are from Ca0.15Zr0.85O crystal phase. NH3- and CO2-temperature programmed desorption prove that the surface of obtained catalysts can provide a large amount of acid and base sites simultaneously. FT-IR spectra of pyridine-adsorbed samples show that acid sites on the surface of Ca–Zr–Sn oxide catalyst mainly exist in a state of Lewis acid, which activates terminal -OH groups of BDO molecule through complexing. The activated -OH interacts with β-H activated on base sites O2−anions relative to Ca species, thereby the CH2=CH- bonds are produced through dehydration to form BTO.
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MOLECULES
·
2022
·Vol. 27
·期 22
·7959
·
IF 4.927
Guan Lin,Juntao Gao,Shenghua Shang,Huanbo Zhang,Qiangke Luo,Yutong Wu,Yong Liu,Xingjiang Chen,Yan Sun
The occurrence of crop fungal diseases is closely related to warm environmental conditions. In order to control the release of fungicides in response to warm conditions, and enhance the efficacy, a series of thermo-responsive fungicide-loaded nanoparticles were developed. The fungicide azoxystrobin, solvent DEP, emulsifier Tween 80 and thermo-responsive component TDA were combined to create thermal-response oil phases, conditions for emulsification were then optimized. LDLS, zeta potential, FTIR, DSC, TGA, XRD, SEM and antifungal efficacy assays were carried out to investigate the characteristics and forming mechanism. The results indicated that the formula with 5 g azoxystrobin, 10 mL DEP, 6 mL Tween 80 and 2.5 g TDA constructed the proposed oil phase with the ability to transform from solid at 20 °C to softerned at 31.5 °C. Both DEP and TDA played key roles in interfering with the crystallization of azoxystrobin. The optimal T3t-c12 nanoparticles had a mean particle size of 162.1 nm, thermo-responsive morphological transformation between 20 °C and 30 °C, AZO crystal reforming after drying, the ability to attach to fungal spores and satisfied antifungal efficacy againstP. nicotianaPNgz07 andA. nigerA1513 at 30 °C. This report provides referable technical support for the construction of smart-release nanoparticles of other agrochemicals.
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高影响因子
ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Guanying Dong,Jingjing Zhang,Zheng Wang,Jing Wang,Peixia Zhao,Xingzhong Cao,Yatao Zhang
Polydopamine-modified additives have been thus far widely used in the mixed matrix membranes (MMMs) for gas separation. However, very few reports focus on the polydopamine alone and investigate its contribution to the gas separation performance. Herein, the polydopamine-derived submicrospheres (PDASS) were paired with polymers of intrinsic microporosity (PIM-1) to fabricate high-performance gas separation membranes, through which the effects of PDASS on gas permeability and CO2/N2 separation performance were systematically investigated. The addition of PDASS provides a 1.6-fold enhancement in CO2/N2 selectivity together with acceptable gas permeability as compared to the original polymeric membrane. Such enhanced separation behavior is supposed to stem from the densified membrane microstructure induced by the strong intermolecular interactions between PIM-1 and PDASS (i.e., charge transfer, π–π stacking, and hydrogen bonding). Importantly, the physical aging behavior, as judged by gas permeability, is retarded for PIM/PDASS membranes after 4 months of testing.
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ChemElectroChem
·
2019
·Vol. 6
·期 17
·4681-4688
·
IF 3.975
Yu Huang,Rengui Xiao,Zhiming Ma,Weichen Zhu
Graphical In sync : The 1-ethyl-3-methylimidazolium trifluoromethanesulfonate (EMImTfO) dual-graphite battery exhibits a high discharge plateau above 3.0 V, which originates from the synchronized de-intercalations of EMIm + and TfO − from the graphite cathode and anode, respectively. The battery can light up a red LED with 3.0 V standard voltage. In this work, a novel dual-graphite battery (DGB) based on a pure 1-ethyl-3-methylimidazolium trifluoromethanesulfonate (EMImTfO) ionic liquid electrolyte is constructed. Within a charge/discharge voltage range of 1.0–3.9 V and at a current of 400 mA g −1 , batteries with dual-natural-graphite electrodes exhibit a high discharge plateau above 3.0 V with an initial discharge capacity of 46.2 mAh g −1 , delivering a capacity retention of 71.0 % after 100 cycles. Comparative studies between the natural graphite and the synthetic graphite (KS6) electrodes are also conducted. Charge-discharge tests reveal that the dual natural-graphite battery presents a higher discharge voltage plateau and better retention than the dual KS6-graphite battery. To confirm the principle of the dual-graphite systems, a cyclic voltammetry test is conducted. The results demonstrate that the EMIm + cation exhibits an even more stable intercalation/de-intercalation behavior than the TfO − anion. Further tests, including ex situ X-ray diffraction and ex situ Raman spectroscopy, are performed to reveal the mechanism of TfO − and EMIm + intercalation into graphite, both demonstrating a reversible process.
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CERAMICS INTERNATIONAL
·
2019
·
IF 3.45
S.D. Zhou,Y.G. Wang,Y. Li,H. Wu,L. Zhu
The ternary (1− x )(0.8BiFeO 3- 0.2BaTiO 3 )- x K 0.5 Na 0.5 NbO 3 (0 ≤ x ≤ 0.5) solid solutions have been successfully synthesized by a solid-state reaction route. X-ray diffraction and Rietveld refinement studies reveal the phase transition from the rhombohedral and tetragonal phases to the single tetragonal phase with x increasing. The average grain size decreases initially and then increases as x increases, whereas the remnant magnetization shows an opposite trend and reaches the maximum value of ~2.09 emu/g at x = 0.3. An enhanced remnant polarization of ~8.6 μC/cm 2 appears at x = 0.3 due to the structure distortion and the decrement of defects. Moreover, the remanent polarization and the relative permittivity reach the maximum value of ~20.14 μC/cm 2 (10 Hz) and ~644 (1 kHz) at x = 0.5, respectively, and the corresponding dielectric loss decreases to the lowest value of ~0.022 (1 kHz). These results indicate that the properties of ternary BFO-BTO-KNN solid solutions can be modulated by adjusting the K 0.5 Na 0.5 NbO 3 content to adapt to different application needs.
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BMC CANCER
·
2026
·
IF 4.1
Mao Anrui,Yang Jie,Bian Chenyang,Jia Yukai,Tong Kun,Zhou Hongkun
Background Intrahepatic cholangiocarcinoma (ICC) is a primary hepatic malignancy with an incidence second only to hepatocellular carcinoma (HCC). Preoperative differentiation between ICC and HCC remains challenging in certain cases. This study aimed to identify potential diagnostic lipid biomarkers for ICC. Methods Untargeted lipidomic analysis was performed on plasma samples from 50 normal controls (NC), 50 patients with HCC, and 30 patients with ICC. Results The results showed that the differential lipid species in the plasma of ICC patients, compared to NC group, were predominantly phosphatidylethanolamine (PE), sphingomyelin (SM), and ceramide (Cer), whereas HCC patients primarily exhibited differences in phosphatidylcholine (PC), triglyceride (TG), and acylcarnitine (CAR). Notably, relative to the NC group, SM (30:1; O2) was significantly upregulated in the ICC group but downregulated in the HCC group ( P < 0.05). Compared with conventional tumor markers such as carbohydrate antigen 19 − 9 (CA19-9) and carcinoembryonic antigen (CEA), SM (30:1; O2) demonstrated superior diagnostic efficacy for ICC (AUC = 0.8793, P < 0.001). Correlation analysis showed that SM (30:1; O2) levels were significantly positively correlated with ICC TNM stage (ρ = 0.721, P < 0.001), indicating a potential association with tumor progression. Conclusions SM (30:1; O2) is a promising biomarker for ICC diagnosis, capable of effectively distinguishing ICC from HCC, and providing valuable guidance for preoperative diagnosis and therapeutic decision-making.
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SOLID STATE SCIENCES
·
2016
·
IF 2.041
Haoliang Xue,Zhuangzhang He,Yun Zhao,Qingze Jiao,Qin Wu,Hansheng Li
ZSM-5/KIT-1 composites were synthesized using an ionic liquid as a template. The structures and morphologies of as-obtained products were characterized using an infrared spectroscopy, X-ray diffractometer, N 2 adsorption/desorption, scanning electron microscopy and transmission electron microscopy . The resultant zeolites show a fully crystalline microporous MFI zeolite framework and a three-dimensional network of short worm-like channels. Mesopores and microspores of 4.2 and 0.8 nm in diameter coexist in the zeolite composites. Moreover, the ratio of ZSM-5 and KIT-1 could be simply adjusted by controlling the pre-crystalline time. We believe that the strategy for fabricating ZSM-5/KIT-1 through a simple method could potentially promote the large-scale production of zeolite composites.
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JOURNAL OF MEDICINAL CHEMISTRY
·
2024
·
IF 6.8
Dongyi Cao,Ruiying Xi,Hongye Li,Zhonghui Zhang,Xiaoke Shi,Shanshan Li,Yujie Jin,Wanli Liu,Guolin Zhang,Xiaohua Liu,Shunxi Dong,Xiaoming Feng,Fei Wang
Caspase-1 plays a central role in innate immunity, as its activation by inflammasomes induces the production of proinflammatory cytokines and pyroptosis. However, specific inhibition of the enzymatic activity of this protease is not effective in suppressing inflammation, owing to its enzyme-independent function. Herein, we identified a cyclohexenyl isothiocyanate compound (CIB-1476) that potently inhibited caspase-1 activity and suppressed the assembly and activation of the NLRP3 inflammasome and gasdermin-D-mediated pyroptosis. Mechanistically, CIB-1476 directly targeted pro-caspase-1 as an irreversible covalent inhibitor by binding to Cys285 and Cys397, resulting in more durable anti-inflammatory effects in the suppression of enzyme-dependent IL-1β production and enzyme-independent nuclear factor κB activation. Chemoproteomic profiling demonstrated the engagement of CIB-1476 with caspase-1. CIB-1476 showed potent therapeutic effects by suppressing inflammasome activation in mice, which was abolished in Casp1–/– mice. These results warrant further development of CIB-1476 along with its analogues as a novel strategy for caspase-1 inhibitors.
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PubMed
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Yong Lu,Huixia Feng,Hou Xia,Wu Hai Xia
Polyaniline has a wide application in the field of corrosion protection, the poor solubility of polyaniline limited its application as a corrosion inhibitor. Water-soluble carboxymethyl cellulose -polyaniline composites was synthesized by chemical oxidation polymerization in a mild way without other inorganic or organic acids added. Corrosion inhibition performance of composites was evaluated for Q235 steel corrosion in 1 M HCl corrosive solution using weight loss and electrochemical measurements at various concentrations. The results show that carboxymethyl cellulose -polyaniline composites exhibit good inhibition properties and the remarkable increase in inhibition efficiency, i.e., 94.24% is achieved while the maximum concentration of the experiment is 1000 ppm. The composites in corrosive solution suppress the cathodic hydrogen evolution reactions and anodic metal dissolution of the substrate. Adsorption of the inhibitor on the steel surface follows a Langmuir adsorption isotherm.
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