JOURNAL OF CHROMATOGRAPHY A
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2019
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IF 3.858
Ning Zhang,Lishen Su,Suning Man,Xiaoyun Lei,Ting Huang,Chunling Zhu,Lan Zhang,Xiaoping Wu
A direct immersion solid-phase microextraction (DI-SPME) approach for gas chromatography-mass spectrometry (GC–MS) based on hybrid fiber coating of ionic liquid and polyhedral oligomeric silsesquioxane (POSS) is presented. To fabricate the task-specific coating for the enrichment of polycyclic aromatic hydrocarbons (PAHs), 1-butyl-3-vinylimidazolium bis[(trifluoromethyl)sulfonyl]imide (IL) and POSS were rapidly photoinitiated copolymerized within 5 min on a stainless steel fiber. The high efficient extraction of target analytes can be attributed to a combined result of multiple interactions including the strong C F⋯H C pseudohydrogen bonding, π-π stacking, hydrophobic force, and molecular sieve effect. A wide linear range (0.04–400 ng L −1 ) with low detection limits in the range of 0.004 and 0.5 ng L −1 were obtained for PAHs by GC–MS. The applicability of this coupling method was successfully demonstrated by the analysis of trace PAHs in real river water and soil samples, with satisfied recoveries (84.2–108.6%) and relative standard deviations (<8.1%). Compared to the other commercial fiber-based SPME methods, the IL/POSS hybrid coating-based SPME is much cheaper, thermally stable and capable of eliminating possible deleterious effects as well.
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PubMed
高影响因子
COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY C-TOXICOLOGY & PHARMACOLOGY
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2019
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IF 2.697
Yongzhan Mai,Songyao Peng,Haiyan Li,Zini Lai
Phenanthrene (PHE) is a common polycyclic aromatic hydrocarbon (PAH) in aquatic environments, and this contaminant can cause adverse effects on teleostean performance. In this study, we exposed the model freshwater fish (zebrafish; Danio rerio ) to 300 μg/L PHE for 15 days. Histological analysis demonstrated that liver morphology deteriorated in PHE-exposed zebrafish, and cellular damage in the liver increased. Biological analysis revealed that exposure to PHE elicited significant changes in glutathione S-transferases (GST) and superoxide dismutase (SOD) activities. 476 differentially expressed genes (DEGs) were identified in liver between control and PHE treated groups through the transcriptomic analysis . Gene Ontology enrichment analysis (GO) suggested that PHE exposure induced changes in the expression of genes associated with “lipid transporter activity”, “catalytic activity”, “metal ion binding”, “lipid transport” and “transmembrane transport”. Furthermore, the “vitamin digestion and absorption” and “fat digestion and absorption” pathways enriched in Kyoto Encyclopedia of Genes and Genomes analysis (KEGG). Additionally, five candidate biomarkers associated with the PHE response in zebrafish were identified. In conclusion, our results elucidate the physiological and molecular responses to PHE exposure in the liver of zebrafish, and provide a framework for further studies of the mechanisms underlying the toxic effects of polycyclic aromatic hydrocarbons (PAHs) on aquatic organisms .
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FUEL PROCESSING TECHNOLOGY
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2019
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IF 4.507
Chen Zhu,Jing-Pei Cao,Xiao-Yan Zhao,Tao Xie,Ming Zhao,Xian-Yong Wei
The synergistic catalysis in the catalytic hydrogenolysis (CH) of lignin and its model compounds over a Ni-Ru/AC bimetallic surface was well established. The Ni-Ru/AC exhibits excellent activity and stability for catalytic hydrogenolysis of lignin and its model compound. The additions of Ru into supported Ni/AC can not only improve the overall reactants conversion, but also modify the product distribution. The apparent activation energy (E a ) of BPE hydrogenolysis over Ni-Ru/AC is measured approximately to be 18.3 kJ/mol. This value is considerably lower than the values measured for monometallic Ni/AC (42.4 kJ/mol). Additionally, the turnover frequency (TOF) of Ni-Ru/AC (62.7 h −1 ) was much higher than that of Ni/AC (5.1 h −1 ). In case of CH of lignin, Ni-Ru/AC gave better total liquid yield and higher relative content of main aromatic monomers . The enhancement in the overall hydrogenolysis activity of reactants over bimetallic Ni-Ru/AC is related to the synergistic effect of Ni and Ru. Various characterization methods (XRD, XPS , TEM-EDS, SEM-EDX and BET) are performed to elucidate the formation of synergistic effect. This synergistic effect could originate from the generation of additional surface active sites, small size of metal particles and high dispersion of metal particles.
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CHEMICAL ENGINEERING SCIENCE
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2019
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IF 3.372
Genkuo Nie,Yiying Dai,Yanan Liu,Junjian Xie,Si Gong,Nisha Afzal,Xiangwen Zhang,Lun Pan,Ji-Jun Zou
Synthesizing high performance jet fuel from biomass provides potential way to convert low-cost biomass to valuable fuels and meets the requirements of sustainable development. Here, we report a one-pot synthesis of high density and low freezing point jet-fuel-ranged blending from bio-derived phenol and cyclopentanol, which is with high yield, simple and low-cost for scale-up. With the co-presence of acid catalyst like Hβ and metal catlayst like Pd/C, the alkylation first happens to produce bi-and tri-cyclic compounds under N 2 atomphere, then in H 2 atmosphere the remained reactant is partly hydrogenated and takes part in alkylation again to produce cyclic compounds, finally hydrodeoxygenation happens to convert all the compounds to cyclic hydrocarbons. A jet-fuel-blending containing bi- and tri-cyclic alkanes is obtained at high molar yield of 83.9% from the starting reactant, which shows high density of 0.89 g/mL, freezing point lower than −75 °C. Especially, the major component, i.e. cyclopentylcyclohexane shows much better low-temperature properties compared with reported hydrocarbons with similar molecular structure. This result provides a simple, low-cost way to synthesize high performance jet fuel from biomass.
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CHEMICAL ENGINEERING JOURNAL
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2019
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IF 8.355
Lei Ding,Li Liu,YiFan Chen,Yunzhe Du,ShengJie Guan,Yongping Bai,Yudong Huang
Ultraviolet-shielding poly(ethylene α-truxillate-co-ethylene terephthalate) (PETT) was synthesized via the addition of α-truxillic acid (TA) as a third monomer in the copolymerization modification of poly (ethylene terephthalate) (PET). The effects of TA, with its semi-flexible/semi-rigid special structure, on the chemical structure, thermal properties, crystallization behavior, ultraviolet blocking properties, and mechanical properties of PETT were then investigated. Thermal analysis revealed that a small amount of TA significantly reduced the crystallinity and melting temperature of PETT but did not affect its thermal stability. Notably, the material exhibited excellent thermal properties in processing applications. With the addition of only 10 wt%, PETT could block ~100% of the ultraviolet spectrum (<400 nm), making up for the defect that pristine PET cannot shield the UV-A spectrum (320–400 nm). The yield stress also increased significantly from 29.8 MPa for the neat PET to 40.2 MPa for PETT (10 wt% TA). In addition, the TA is plant-derived and synthesized by environmentally friendly photodimerization reaction. A small amount of TA provides PET with excellent ultraviolet shielding performance and mechanical properties, broadening its application prospects in the field of anti-ultraviolet packaging materials.
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FREE RADICAL BIOLOGY AND MEDICINE
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2019
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IF 5.657
Xueming Cao,Na Zhu,Li Li,Yuwei Zhang,Yan Chen,Jing Zhang,Jiang Li,Chuanyu Gao
Aims Y-box protein 1 (YB1) is a key regulator of inflammatory mediators . However, the roles of YB1 in oxidized low-density lipoprotein (ox-LDL)-induced macrophage inflammation and lipid uptake remain less understood. Thus, we explored the roles of YB1 in ox-LDL-induced macrophage inflammation and lipid uptake and its underlying molecular mechanisms. Methods An ox-LDL-induced atherosclerosis (AS) model was used in this study. Western blotting , RT-PCR, immunofluorescence, ELISA, dil-ox-LDL staining, a dual-luciferase reporter assay, RNA-binding protein immunoprecipitation (RIP) and in vivo experiments were used to detect each target. Results ox-LDL downregulates YB1 expression in THP-1-derived macrophages and human monocyte-derived macrophages (hMDMs) via the NF-κB pathway. Downregulation of YB1 is facilitated by lipid uptake in macrophages, and CD36 is involved in this process. Furthermore, YB1 suppresses CD36 protein levels by directly binding to the coding sequence of the CD36 gene to promote CD36 mRNA decay but does not affect its mRNA transcription. Additionally, YB1 knockdown enhances the inflammatory response and lipid deposition via the NF-κB pathway in vivo. Conclusion ox-LDL decreases YB1 expression in macrophages, resulting in enhanced inflammatory responses by affecting NF-κB and facilitating lipid uptake by promoting scavenger receptor CD36 mRNA decay.
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INDUSTRIAL CROPS AND PRODUCTS
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2019
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IF 4.191
Lu Wang,Xue Lin,Jiachao Zhang,Weimin Zhang,Xiaoping Hu,Wu Li,Congfa Li,Sixin Liu
Non-extractable/bound phenolics from plant matrices played an increasingly important role in human health benefits, but conventional solvent extraction missed high amounts of bound phenolics. In this study, Rubus idaeus L. leaves (RDLR) and seeds residues (RDSR) free of extractable phenolics were treated by different methods, respectively. The results revealed that acid, alkaline, and enzymatic hydrolysis can all significant improve the releasing of bound phenolics. Moreover, acid hydrolysis was the most efficient method for releasing the bound phenolics from RDLR and RDSR, followed by enzymatic hydrolysis. The quantitative results showed that most of individual phenolic compounds were significantly enhanced from RDLR and RDSR after acid hydrolysis. Especially for ellagic acid , was increased by 156.1-folds for RDLR and 101.8-folds for RDSR compared with methanol extraction. For RDLR or RDSR, regardless of the hydrolysis methods, higher contents of bound phenolics evidently showed the stronger antioxidant activities and inhibitory potency in α -glucosidase. Importantly, a significantly positive correlation existed in between the investigated bio-activities and bound phenolics/flavonoids released from RDLR or RDSR. These results provided comprehensive approaches for treating the residues of agricultural crops or fruit tree leaves enriched in bound phenolics, thereby to enhance their bio-accessibility.
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DYES AND PIGMENTS
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2020
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IF 4.613
Xiaotian Yuan,Yujiao Tu,Wei Chen,Zhiwei Xu,Yunlin Wei,Kunhao Qin,Qi Zhang,Yingying Xiang,Hongcai Zhang,Xiuling Ji
A highly photoluminescent small-size carbon dots (CDs) deriving ampicillin sodium were successfully obtained via one-step hydrothermal method . The prepared CDs showed uniform particle size and possessed good excitation-dependent characteristic. The dead bacteria and yeast cells could be selectively stained by the CDs, but the live ones not. It indicated that the CDs possessed a good potential for the live/dead bacteria and yeast differentiation. Cell and plant leaf imaging showed that the prepared CDs possessed low biotoxicity, excellent biocompatibility and multicolor fluorescence emission properties making it a good candidate for bioimaging application. The probe exhibited high selectivity and sensitivity to detect Hg(II) and 2,4-dinitrophenol (2,4-DNP), and excellent linear range of 0–50 μM for Hg(II) (R 2 = 0.9920) and 0–25 μM for 2,4-DNP (R 2 = 0.9919), with low detection limits of 33.40 nM and 13.44 nM for Hg(II) and 2,4-DNP, respectively. It revealed that dynamic quenching mechanism dominated in Hg(II) quenching the CDs fluorescent, while the quenching mechanism of 2,4-DNP detection belonged to the inner filter effect. The sensor was successfully applied to determine the Hg(II) and 2,4-DNP in real water samples. It shows that the fluorescent nanoprobe shows great promising potential for the detection of environmental pollutants.
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JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2019
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IF 2.298
Wenyang Fan,Houchun Yan,Xin Huang,Zhaohui Liao,Qingsong Li,Zhanhua Ma
The extraction process as a kind of energy-saving and environmental protection technology can be used to separate phenols from low-temperature coal tar. The liquid–liquid equilibrium (LLE) data regarding ternary systems n-heptane + phenols + furfural were determined experimentally at 303.2, 323.2, and 343.2 K under the atmospheric pressure condition, where phenols refer to phenol, p-cresol, and 2,6-xylenol. The solvent extraction capacity was assessed by the solute distribution coefficient and selectivity. Othmer–Tobias and Bachman equations were utilized to validate the consistency of the measured data, which the linear correlation (R2) ≥ 0.99. Experimental LLE data were correlated utilizing the NRTL and UNIQUAC thermodynamic models with all of the RMSD and AARD values below 0.01, meaning that each ternary system is satisfactorily in agreement at temperatures studied and the NRTL model gives better agreement than the UNIQUAC model for ternary systems.
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高影响因子
APPLIED SURFACE SCIENCE
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2019
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IF 5.155
Shuying Gao,Fu Yang,Changjian Song,Qiong Cai,Ruyi Wang,Shijian Zhou,Yan Kong
As an energy-efficient and environmental friendliness method, solar sunlight-driven photo-oxidation catalysis process for organic chemicals synthesis has gained enormous attention, but still faces huge challenge in developing highly-efficient photocatalysts material. Two-dimensional materials engineering and surface defect engineering of photocatalysts both provide an effective strategy to improve the catalytic activity. Inspired by this pathway, we design and synthesize ultrathin porous ZnO nanosheets featuring abundant oxygen vacancies specific to producing dihydroxybenzenes based on a photocatalytic oxidation process. Several valid characterizations had been employed to discern the structural character of the obtained model catalyst, revealing that the resultant ZnO sheets afford an average thickness of 3 nm, and abundant surface porosity, thereby contributing to the rich oxygen vacancies. Such a structure could generate a synergistic effect to enhance the optical absorption and improve the transportation rate of photogenerated charge carriers from the materials design. As expected, the specific ultrathin ZnO nanosheets exhibited a greatly-improved photocatalytic activity for oxidation of phenol to dihydroxybenzenes (31.5% conversion & almost 76.7% selectivity of DHB), near 3 and 4 times higher, respectively than its counterparts that one with few oxygen vacancies and Bulk-ZnO. Impressively, the obtained catalyst showed durable catalytic activity without any activity loss during the five recycling. Finally, the feasible oxidation mechanism was proposed and testified by the controlled scavenger experiments. This study provides a novel reference on how to design high-performance photocatalytic material.
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高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2019
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IF 3.375
Hongwei Gao,Yongping Bai,Huihui Liu,Jinmei He
1,6-Hexylenediamine (HMDA) was chosen to replace part of ethylene glycol to develop a novel poly(ethylene terephthalate) structure with amide bonds. Four kinds of poly(ester amide)analogues (p-ETA) with different contents of amide bonds (1–4 mol %) were successfully synthesized via a new simple synthesis procedure. It was proved that the thermal stability and mechanical properties were significantly enhanced because of the introduction of amide bond units. More importantly, adding a small amount (1 mol %) of HMDA could effectively accelerate the orderly arrangement of molecular chains and formation of crystal nuclei proved by differential scanning calorimetry, X-ray diffraction, and polarized optical microscopy test results. It showed that the calendered p-ETA films acted as a good barrier to water and oxygen, expanding its application as packaging materials. Experimental results indicated that the introduction of amide bond units substantially promoted the overall performances of poly(ethylene terephthalate), such as crystallinity (28.4 vs 14.1%), tensile strength (60.9 vs 55.7 MPa), elongation at break (381 vs 226.8%), and so forth.
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高影响因子
MICROCHEMICAL JOURNAL
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2019
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IF 3.206
Kwabena Agyarko Sarpong,Kun Zhang,Yu Luan,Yunfei Cao,Wanzhen Xu
Tetrabromobisphenol-S (TBBPS) is a Brominated Flame Retardants (BFRs). TBBPS in trace quantities is lethal and do not only alter the normal performance of the endocrine system but can directly or indirectly provoke hepatoxicity and carcinogenic diseases. Herein, we fabricate a facile electrochemical sensor and investigate its application towards the determination of TBBPS through imprinting technique. TBBPS imprinting was carried out in the presence of methacrylic acid (MAA) and 4-aminothiophenol (4-ATP) functional monomers (DiM) over gold nanoparticles (AuNPs) modified carbon paste electrode (CPE). Transmission electron microscopy (TEM) was used to characterize the imprinted sensor. Performance was thoroughly investigated using both cyclic voltammetry (CV) and differential pulse voltammetry (DPV). The proposed sensor showed detection behavior towards TBBPS in standard solutions with different concentrations range of 0.1 nM-10 nM and with a detection limit of 0.029 nM. The developed MIP(DiM)@AuNPs/CPE sensor had enhanced recognition capacity compared to MIP electrochemical sensors developed with a mono functional monomer (MIP(MoM)@AuNPs/CPE) and non-imprinted sensors. In addition, the low cost; easier preparation; excellent stability; and good selectivity of MIP(DiM)@AuNPs/CPE electrochemical sensor makes it an attractive alternative to high instrumentation detection techniques.
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高影响因子
危险品化学品经营许可证（带存储）