FOOD AND CHEMICAL TOXICOLOGY
·
2014
·
IF 2.61
Chang Li,Shao-Ping Nie,Yong-qiang Zhou,Ming-Yong Xie
3-monochoropropane-1, 2-diol (3-MCPD) esters from edible oils are considered to be a possible risk factor for adverse effects in human. In the present study, the exposure assessment of 3-MCPD esters to Chinese population was performed. A total of 143 edible oil and fat samples collected from Chinese markets were determined for the concentrations of 3-MCPD esters. The concentration data together with the data of fats consumed were analyzed by the point evaluation and probabilistic assessment for the exposure assessment. The point evaluation showed that the mean daily intake (DI) of 3-MCPD esters were lower than the value of provisional maximum tolerable daily intake (PMTDI) of 3-MCPD (2 µg/kg BW/d). The mean DI values in different age groups obtained from probabilistic assessment were similar to the results of the point evaluation. However, in high percentiles (95th, 97.5th, 99th), the DI values in all age groups were undesirably higher than the value of PMTDI. Overall, the children and adolescents exposed more to 3-MCPD esters than the adults. Uncertainty was also analyzed for the exposure assessment. Decreasing the level of 3-MCPD esters in edible oils and consuming less oil were top priority to minimize the risk of 3-MCPD esters.
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高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2019
·
IF 4.978
Ting Wang,Junnan Wei,Huai Liu,Yunchao Feng,Xing Tang,Xianhai Zeng,Yong Sun,Tingzhou Lei,Lu Lin
2, 5-Bishydroxymethylfuran (BHMF) has been currently emerged as a promising biomass-derived monomer . It is highly desirable to proceed a chemical process at a high substrate concentration, by which a facile and cost-effective separation of products can be expected. Herein, we report for the first time on the hydrogenation of highly concentrated 5-hydroxymethylfurfural (HMF) in deep eutectic solvents (DESs), giving a near quantitative selectivity towards BHMF in ChCl-glycerol DES at 25 °C in 3 h using NaBH 4 as the H-donor. DES is hailed as a new class of green solvent, in which HMF/BHMF could be stabilized by the strong hydrogen-bond interaction, and allowed the selective hydrogenation of HMF at high concentration up to 40 wt%. Notably, the resulting BHMF could be facilely separated by extraction with ethyl acetate, and then high purity of BHMF with a desirable isolated yield around 80% was obtained after removing of ethyl acetate. Additionally, the reaction efficiency of HMF hydrogenation in DESs was verified to be strongly associated with the viscosity of DESs and the p K a value of hydrogen-bonding donor.
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高影响因子
AICHE JOURNAL
·
2025
·
IF 4
Jia Xiong,Qiang Sun,Hongxia Gao,Zhiwu Liang
Catalytic amine–based solution regeneration has attracted considerable attention due to its potential to reduce energy consumption in carbon dioxide (CO 2 ) separation. However, the limited catalytic activity and cycling stability of catalysts under high–temperature alkaline conditions hinder their industrial application. Herein, zirconium hydrogenphosphate (ZrHP) catalysts, featuring abundant acidic sites, were first utilized for amine solution regeneration. By leveraging its proton donation and acceptance mechanism, efficient monoethanolamine solution regeneration was achieved. The ZrHP–4 catalyst demonstrated a 526% increase in the instantaneous CO 2 desorption rate compared to the non–catalytic test, reducing the relative heat duty by 48%. Moreover, ZrHP–4 exhibited remarkable stability over 10 cycles without requiring regeneration. Density functional theory calculations revealed that ZrHP promotes CO 2 desorption by elongating the C—N bond of carbamate and lowering the proton transfer energy barrier. Therefore, this study offers novel insights into the design and mechanistic understanding of efficient and stable catalysts for amine solution regeneration.
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高影响因子
Microorganisms
·
2025
·Vol. 13
·期 8
·1865
·
IF 4.2
Chenchen Zhao,Yan Qin,Haixin Huang,Yuying Li,Xinyu Zhang,Lin Zhou,Lulu Xie,Yimin Zhou,Yanqing Hu,Wei Chen,Tian Lan,Wen-Chao Sun
Swine acute diarrhea syndrome coronavirus (SADS-CoV) is a recently discovered enteric coronavirus that has caused considerable economic losses in the pig industry. SADS-CoV was first reported in 2017 in Guangdong Province, China, and subsequently in Fujian, Guangxi, Henan and Jiangxi Provinces. Bone marrow stromal cell antigen 2 (BST-2), also known as tetherin, acts as an antiviral protein to limit the release of a wide range of enveloped viruses. However, the relationship between BST-2 and SADS-CoV has rarely been studied. Here, we showed that endogenous BST-2 expression is downregulated by SADS-CoV infection in Vero-E6 and ST cells by 2- to 3-fold. The overexpression of BST-2 inhibited SADS-CoV replication, whereas the knockdown of the BST-2 gene in Vero cells restored SADS-CoV replication. Further study revealed that BST-2 targets the SADS-CoV nucleocapsid protein (N) and decreases N protein expression, and that the BST-2 transmembrane (TM) domain is essential for this activity. Moreover, the degradation of the SADS-CoV N protein promoted by BST-2 is mediated by the membrane-associated ring-CH-type finger 8 (MARCHF8)/calcium binding and coiled-coil domain 2 (NDP52) autophagosome pathway. Overall, we found that BST-2 suppresses viral proliferation by inducing the breakdown of the SADS-CoV N protein via the MARCHF8/NDP52 pathway.
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产品关联
DOI
PubMed
高影响因子
AICHE JOURNAL
·
2025
·
IF 4
Qi Liu,Yihan Yin,Tong Luo,Min Xiao,Hongxia Gao,Wilfred Olson,Zhiwu Liang
Amine blend is a viable method to formulate superior absorbents for CO 2 capture from flue gas. However, the understanding of the degradation of blended amines, especially the interaction effect on the degradation pathway is limited, which restricts the solvent development. In this work, the oxidative degradation of 1-amino-2-propanol (1AP) and its blends with various tertiary amines is studied by analyzing amine loss, alkalinity loss, viscosity change, NH 3 emission, and heat-stable salt generation. Experimental results show that both triethanolamine and N -methyldiethanolamine have an excellent inhibition effect on 1AP oxidative degradation, reducing 1AP loss from 47.0% to 6.5% and 8.5%, respectively. The reaction pathways for the oxidative degradation of single and blended 1AP solutions are proposed and evaluated by density functional theory calculations. Computational results show that the reactions between 1AP peroxide radicals and peroxide radicals of tertiary amines reduce 1AP loss, which agrees with experimental results.
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高影响因子
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Guomin Geng,Mengyang Cai,Rui Fang,Qian Luan,Zhiqiang Zhang,Jianjun Song,Jian Zhang
Developing highly efficient and stable catalysts toward advanced oxidation technology is the key to achieve industrial peroxymonosulfate (PMS) activation for pollution degradation. Perovskite-type oxide catalysts show high activity and stability for PMS activation, yet the small specific surface area of perovskite catalysts limits the increase of catalytic performance. Metal-organic frameworks (MOFs) have been widely used as the templates/precursors to prepare high specific surface area nanomaterials. In this study, two kinds of high surface area perovskites LaCoO 3 and LaMnO 3 were firstly fabricated with MOFs as templates. Benefiting from the extraordinary skeleton structure of MOFs, well-defined architecture and porous perovskite catalysts show superior catalytic performance towards PMS activation for the degradation of 2, 4-dichlorophenol (2, 4-DCP), with a 99.8% degradation of 2, 4-DCP in 25 min for LaCoO 3 catalyst. Moreover, the LaCoO 3 catalysts exhibit long-term stability with a slight loss of catalytic activity during 3 times recycled experiments. This study not only developed high activity catalysts for PMS activation, but also expanded the MOFs applications for environment and energy.
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高影响因子
JOURNAL OF APPLIED PHYSICS
·
2019
·Vol. 126
·期 6
·
IF 2.328
Zhang Huazhang,Zhou Jing,Shen Jie,Yang Xiong,Wang Tianheng,Xiang Guanglei,Wei Quan,Chen Wen
Electrically and thermally induced transitions between ferroelectric and relaxor states are of great importance for Bi 1/2 Na 1/2 TiO 3 (BNT)-based materials because of their close relevance to electromechanical properties. In this study, the electric field-temperature ( E - T ) phase diagrams of Fe doped Bi 1/2 (Na 0.8 K 0.2 ) 1/2 TiO 3 (BNKT) ceramics are constructed via an experiment and theory combined approach. A novel phenomenological model based on the Landau-Devonshire theory and the Preisach model is proposed to describe the electric field induced phase transitions. Using this model, an approximate free-energy landscape is obtained by fitting the experimental double polarization-electric field loop, and then the electric field representing ferroelectric and relaxor two-phase equilibrium is calculated from the free-energy landscape for the construction of an E - T phase diagram. The constructed E - T phase diagrams meet basic thermodynamics requirements, for example, the Clausius-Clapeyron relation, and, therefore, overcome some of the shortcomings of previously reported E - T phase diagrams for BNT-based ceramics. The relationship between the E - T phase diagram and electromechanical properties is also established. From the E - T phase diagrams, it is predicted that Fe doping could lower the threshold field of triggering giant strains of BNKT ceramics at a high temperature. This prediction is successfully verified by experimental measurement of the electric field induced strain. At the optimized temperature for strain property, the threshold field of triggering giant strain is estimated to be about 2.6 kV/mm for a 3.0% Fe doped sample, significantly lower than 3.5 kV/mm for the undoped sample. This shows that the E - T phase diagram can provide valuable guidance for the improvement of electromechanical properties of BNT-based ceramics.
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高影响因子
JOURNAL OF CHEMICAL THERMODYNAMICS
·
2018
·
IF 2.631
Ting Zheng,Jiaojiao Fang,Qinglong Xie,Zhenyu Wu,Meizhen Lu,Fan Xia,Dongshun Deng,Yong Nie,Jianbing Ji
Fatty acid 2-ethylhexyl esters are used for the eco-friendly production of biolubricant. There are several reports on their synthesis, but thermodynamics and transport data of these compounds are lacking. Herein, density and viscosity of palmitic acid 2-ethylhexyl ester, stearic acid 2-ethylhexyl ester and soya oil 2-ethylhexyl esters in the temperature range of T = (298.18–368.15) K at atmospheric pressure were measured and the vapor pressure in the temperature range of T = (476.95–500.85, 477.05–498.05, 477.75–500.05) K was determined. The obtained experimental data were correlated using temperature-dependence correlation equations, and the correlation coefficients of all the equations were over 0.999. In order to examine the reliability of the data, the GCVOL group method was used to evaluate densities for these fatty acid 2-ethylhexyl esters with the maximum relative deviation of −1.34%. The experimental viscosity data of synthesized 2-ethylhexyl esters were compared with those of lauric acid 2-ethylhexyl ester, palmitic acid n-octyl ester and oleic acid 2-ethylhexyl ester from previous studies. In addition, the molar enthalpy of vaporization at the mean temperature of the experimental range was calculated for the first time using the Clausius-Clapeyron equation.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Lixia Wang,Rongfei Ye,Panming Jian,Jiangyong Liu
Metal-free catalysts with environmental friendless, cost-competitiveness and less susceptibility to leaching and poisoning over metal-based catalysts, have revolutionized in the catalysis domain. In this respect, we herein report the first application of cheap and abundant pumpkin-derived N -doped porous carbon for the reduction of 2-methyl-4-nitrophenol assisted by NaBH 4 . The obtained catalyst is cost-competitive, efficient and robust, with an attractive mass-normalized rate constant of 4.73 s −1 g −1 and good recycling performance. Systematical analyses demonstrate that the 2-methyl-4-nitrophenol reduction reaction catalyzed by the N -doped carbon proceeds through the Langmuir–Hinshelwood kinetics and the performance enhancement benefits from the strong adsorption and activation of the substrates induced by the electronic modulation in the carbon framework via N -doping. This study opens up new avenues for the high-value use of pumpkin as well as the development of metal-free strategy in more catalytic applications.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Yang Zhu,Tongfeng Cai,Huangping Rui,Xiangyao Gu,Xueqin Mu,Yu Tong,Haibao Duan,Changyun Chen,Suli Liu,Shichun Mu
The surface configuration of low‐cost spinel oxides for oxygen evolution reaction (OER) can significantly affect the electrochemical behavior by generating a thin oxyhydroxide layer and other structures on the surface. Herein, we design and construct phosphorus (P)-activated ~1.0 nm ultrathin CoO nanosheets (devoted as P x -CoO NSs) with enriched P-O bonds and high valence state Co active sites, which is beneficial to the OER process due to the balance with Co 3+ and oxygen vacancies on the reconstructed surface/interface. In addition, such an ultrathin nanosheet structure is also benefit to expose more active sites and improve the intrinsic electronic conductivity. As a result, the surface reconstructed P x -CoO NSs show superior OER activity compared with pure CoO and IrO 2 as benchmark. Furthermore, P 1 -CoO NSs demonstrate intrinsically high mass activity of 6.8 A g Co −1 at an overpotential of 270 mV, large turnover frequency of 0.0024 s −1 at an overpotential of 300 mV, and strong cycling stability in 0.1 M KOH solutions. Structural analysis further reveals that, as compared with CoO, the P-substitution not only induces the surface reconstruction into active Co oxyhydroxides under OER conditions, but also enhances the reaction kinetics. Undoubtedly, this work enriches the ways to prepare high-performance transition-metal-oxide-based catalyst for practical applications.
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高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2024
·
IF 5.3
Wen-bo Zhao,Wen-shuo Zhang,Jun Shen,Yu-gao Wang,Yan-xia Niu
The high-temperature coal tar wash oil contains two valuable components, namely, quinoline and 2-methylnaphthalene. These two components are challenging to separate during the deep processing. To address this issue, the COSMO-RS (Conductor-like Screening Mode for Real Solvent) model was utilized to identify them as a potential deep eutectic solvents (DESs) extractant. Based on the calculated infinite dilution activity coefficient, the performance indexes of DESs , including selectivity, solubility, and performance index were determined and utilized to identify high-performance extractants for the quinoline/2-methylnaphthalene system. Finally five DESs were selected based on these indexes, they are DES1 formed by Choline chloride: propionic acid with the molar ratio of 1:1, similarly, DES2 is Choline chloride:oxalic acid of 1:1, DES3 Tetraethylammonium chloride:propionic acid of 1:1, DES4 Tetraethylammonium bromide:itaconic acid of 1:2 and DES5 Tetraethylammonium bromide:propionic acid of 1:2. The liquid–liquid phase equilibrium experiments of the aforementioned five DESs at different temperatures (30 ℃, 40 ℃, and 50 ℃) under atmospheric pressure were conducted. The results showed that five kinds of DESs had good extraction effect on quinoline. The DESs formed by choline chloride and anhydrous oxalic acid had the best extraction effect. The quantum chemical single-molecule optimization of different HBDs and HBAs in DESs, intermolecular interaction energy analysis and independent gradient modeling shows that it is mainly induced by the formation of shared electron pairs by providing empty orbitals from DESs and lone pair of electrons from the quinoline molecule, and the main force is the weak hydrogen bonding force.
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高影响因子
Journal of Materials Chemistry A
·
2024
·Vol. 12
·期 24
·14608-14618
·
IF 10.7
Ruixi Liu,Qian Zhao,Zeru Wang,Rui Jiang,Chuancong Lin,LinZhen Wu,Guangyuan Chen,Pan He,Lin Zhu,Jing Chen,Tao Duan
Effective capture of the radionuclide strontium is essential for the sustainable development of nuclear energy. Zirconium phosphate, with its tunable interlayer spacing and excellent ion exchange properties, holds potential applications in this field. In this work, a calcium zirconium phosphate (Ca0.55ZrH0.9(PO4)2) with ultra-wide spacing was obtained by means of layer spacing modulation. The saturable adsorption capacity of this material for Sr2+ was close to twice that of commercial zirconium phosphate, reaching 226.9 mg g−1. Particularly noteworthy is its saturation adsorption capacity at pH = 1, which is 6.7 times higher than that of commercial ZrP. Leveraging Ca2+ involvement in ion exchange reactions, calcium zirconium phosphate exhibits exceptional selectivity for Sr2+ capture in simulated acidic competitive ion solutions. Moreover, it demonstrates outstanding acid resistance and radiation tolerance. Through a comprehensive approach involving characterization techniques, experimental analyses, and density functional theory calculations, we elucidated its potential adsorption mechanisms at the molecular level. Crucially, the material synthesis and experimental processes are free from harmful ion byproducts, rendering it amenable to large-scale production. This advancement provides a promising avenue for the efficient capture of Sr2+ in practical wastewater treatment scenarios.
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高影响因子
危险品化学品经营许可证（带存储）