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Wang ZX, Mao YH, Wang Y, Fu PJ, Dang X, Xu LN. [Evaluation of anticoagulant effect and predicted dose of low molecular weight heparin in hemodialysis by anti-Ⅹa factor activity]. Zhonghua Yu Fang Yi Xue Za Zhi 2024; 58:254-260. [PMID: 38387959 DOI: 10.3760/cma.j.cn112150-20230803-00053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 02/24/2024]
Abstract
The purpose of this study was to explore the reasonable dose of low molecular weight heparin (LMWH) in hemodialysis (HD) and the strategy of preventing extracorporeal circuit coagulation (ECC). A retrospective case-control study included patients who used LMWH for anticoagulation during maintenance hemodialysis (MHD) in the Hemodialysis Center of Beijing Hospital from December 2020 to January 2021. Basic data such as weight, height, basic kidney disease, dialysis age and anti-Ⅹa factor activity before, during and after dialysis were collected. A total of 46 patients were enrolled in this study, including 5 patients in coagulation group (10.9%) and 41 patients in non-coagulation group (89.1%). The anti-Ⅹa factor activity reached its peak at 0.5 h after the start of HD. The level of anti-Ⅹa factor was incorporated into the receiver operating characteristic curve (ROC curve). The results showed that the area under the ROC curve (AUC) was 0.802 (95% confidence interval: 0.651-0.54, P=0.029), and the cutoff was 0.31 IU/ml (sensitivity 1, specificity 0.683). It is suggested that the body surface area should be used as the basis to estimate the anticoagulant dose of LMWH in HD, and the activity of HD 4 h anti-Ⅹa factor ≤0.31 IU/ml, which is of diagnostic value for ECC. In addition, the results of binary logistic regression analysis showed that dialysis age was an independent risk factor for ECC (OR value 1.319, 95%CI 1.052-1.654, P=0.017). In summary, this study reveals that dialysis age may be a risk factor for ECC and that the activity of HD 4 h anti-Ⅹa factor ≤0.31 IU/ml can be used as a potential diagnostic cut-off point for ECC in HD patients, which provides a scientific basis for monitoring strategies to prevent blood coagulation in HD filters.
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Affiliation(s)
- Z X Wang
- Department of Nephrology, Beijing Hospital, National Center of Gerontology, Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, Beijing 100005, China
| | - Y H Mao
- Department of Nephrology, Beijing Hospital, National Center of Gerontology, Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, Beijing 100005, China
| | - Y Wang
- Department of Nephrology, Beijing Hospital, National Center of Gerontology, Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, Beijing 100005, China
| | - P J Fu
- Department of Nephrology, Beijing Hospital, National Center of Gerontology, Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, Beijing 100005, China
| | - X Dang
- Department of Nephrology, Beijing Hospital, National Center of Gerontology, Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, Beijing 100005, China
| | - L N Xu
- Department of Nephrology, Beijing Hospital, National Center of Gerontology, Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, Beijing 100005, China
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Liu Y, Dang X, Chen H. A molecularly imprinted polymer monolithic column with dual template and bifunctional monomers for selective extraction and simultaneous determination of eight phenolics from polycarbonate cups. Anal Chim Acta 2023; 1273:341493. [PMID: 37423657 DOI: 10.1016/j.aca.2023.341493] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Revised: 06/01/2023] [Accepted: 06/05/2023] [Indexed: 07/11/2023]
Abstract
A molecularly imprinted polymer (MIP) monolithic column was prepared in situ in a pipette tip using phenol and bisphenol A as dual templates, 4-vinyl pyridine and β-cyclodextrin as bifunctional monomers. It was used for the selective and simultaneous solid phase extraction of eight phenolics, including phenol, m-cresol, p-tert-butylphenol, bisphenol A, bisphenol B, bisphenol E, bisphenol Z, and bisphenol AP. The MIP monolithic column was characterized by scanning electron microscopy, Fourier transform infrared spectroscopy, thermogravimetric analysis and nitrogen adsorption experiment. The results of selective adsorption experiments showed that the MIP monolithic column can selective recognize the phenolics and have excellent adsorption property. The imprinting factor for bisphenol A can be as high as 4.31, and the maximum adsorption capacity for bisphenol Z can reach 201.66 mg g-1. Under the optimal extraction conditions, a selective and simultaneous extraction and determination method for eight phenolics was established based on the MIP monolithic column and high-performance liquid chromatography with ultraviolet detection. The linear ranges (LRs) of the eight phenolics were 0.5-200 μg L-1, the limits of quantification (LOQs) and detection (LODs) were 0.5-2.0 μg L-1 and 0.15-0.67 μg L-1. The method was applied to detect the migration quantity of the eight phenolics from polycarbonate cups and had satisfactory recovery. The method has the advantages of simple synthesis, short extraction time, as well as good repeatability and reproducibility, which provides a sensitive and reliable strategy for extracting and detecting phenolics from food contact material.
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Affiliation(s)
- Yang Liu
- Collaborative Innovation Center for Advanced Organic Chemical Materials Co-constructed by the Province and Ministry, Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Hubei University, Wuhan, 430062, PR China
| | - Xueping Dang
- Collaborative Innovation Center for Advanced Organic Chemical Materials Co-constructed by the Province and Ministry, Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Hubei University, Wuhan, 430062, PR China.
| | - Huaixia Chen
- Collaborative Innovation Center for Advanced Organic Chemical Materials Co-constructed by the Province and Ministry, Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Hubei University, Wuhan, 430062, PR China
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Wu X, Yang H, Lyu H, Chen H, Dang X, Liu X. A Zn-based metal coordination cluster Zn 5 used for solid phase microextraction of ten phenolic compounds from water and soil. J Hazard Mater 2023; 453:131382. [PMID: 37054643 DOI: 10.1016/j.jhazmat.2023.131382] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Revised: 04/04/2023] [Accepted: 04/05/2023] [Indexed: 06/19/2023]
Abstract
Exploring coating materials with superior extraction efficiency has always been the pursuit in the field of solid phase microextraction (SPME). Metal coordination clusters with high thermal and chemical stability, abundant functional groups as active adsorption site are the promising coatings. In the study, a Zn5(H2Ln)6(NO3)4 (Zn5, H3Ln =(1,2-bis-(benzo[d]imidazol-2-yl)-ethenol) cluster coating was prepared and applied for SPME of ten phenols. Zn5 based SPME fiber exhibited high extraction efficiencies for phenols in headspace (HS) mode, which circumvented the pollution of SPME fiber. The adsorption isotherm and theoretical calculation indicated the adsorption mechanism of phenols on Zn5 was hydrophobic interaction, H-bond interaction and π-π stacking. Under the optimized extraction conditions, an HS-SPME-GC-MS/MS method was developed for the determination of ten phenols in water and soil samples. For ten phenolic compounds in water and soil samples, the linear ranges were 0.5-5000 ng/L and 0.5-250 ng/g, respectively. The limits of detection (LODs, S/N = 3) were 0.010-1.20 ng/L and 0.0048-0.16 ng/g, respectively. The precisions of single fiber and fiber-to-fiber were lower than 9.0% and 14.1%, respectively. The proposed method was applied for the detection of ten phenolic compounds in various water and soil samples, showing satisfactory recovery (72.1-118.8%). This study delivered a novel and efficient SPME coating material for the extraction of phenols.
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Affiliation(s)
- Xinze Wu
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules & College of Chemistry and Chemical Engineering, Hubei University, Wuhan, China
| | - Hao Yang
- Public Inspection and Testing Center, Xinzhou District, Wuhan, China
| | - Hui Lyu
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules & College of Chemistry and Chemical Engineering, Hubei University, Wuhan, China
| | - Huaixia Chen
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules & College of Chemistry and Chemical Engineering, Hubei University, Wuhan, China.
| | - Xueping Dang
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules & College of Chemistry and Chemical Engineering, Hubei University, Wuhan, China
| | - Xiaolan Liu
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules & College of Chemistry and Chemical Engineering, Hubei University, Wuhan, China
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Wu X, Chu Q, Ma Q, Chen H, Dang X, Liu X. Fabrication and application of Zn 5 functionalized copolymer monolithic column for pipette tip micro-solid phase extraction of 4 polycyclic aromatic hydrocarbons in edible oil. Food Chem 2023; 413:135605. [PMID: 36787666 DOI: 10.1016/j.foodchem.2023.135605] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2022] [Revised: 01/16/2023] [Accepted: 01/28/2023] [Indexed: 02/04/2023]
Abstract
The contamination of polycyclic aromatic hydrocarbons (PAHs) in edible oil is a health threat. Thus, trace analysis of PAHs is of high necessity. Based on the efficient adsorption of PAHs on Zn5 metal cluster, a Zn5 functionalized copolymer monolithic column was rationally designed for pipette tip micro-solid phase extraction (μ-SPE). The modified Zn5 improved the adsorption selectivity and capacity of the monolith for naphthalene, phenanthrene, fluoranthene and pyrene. Chemical doping and copolymerization stabilized the monolith with a long life. Under optimal extraction conditions, a μ-SPE-high performance liquid chromatography with ultraviolet detector method was established for the detection of 4 PAHs in edible oils. The method yielded detection ranges of 0.15-250 μg L-1 (R2 > 0.997), detection limits of 0.050-1.5 μg L-1, satisfactory recoveries (86.3-101.5 %), and high precisions (RSDs < 7.9 %). The results indicated that the Zn5 functionalized copolymer monolithic column was an ideal separation medium for the detection of PAHs residues in edible oils.
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Affiliation(s)
- Xinze Wu
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules & College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, China
| | - Qiqi Chu
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules & College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, China
| | - Qiong Ma
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules & College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, China
| | - Huaixia Chen
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules & College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, China.
| | - Xueping Dang
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules & College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, China
| | - Xiaolan Liu
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules & College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, China
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Liu Y, Dang X, Zhang S, Hu Y, Chen H. Migration detection of six aromatic amines in polyamide food contact materials by HPLC after molecularly imprinted polymer pipette tip solid phase extraction. Food Packag Shelf Life 2023. [DOI: 10.1016/j.fpsl.2023.101029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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Liu Y, Dang X, Ding H, Chen H. Specific Recognition and Solid Phase Extraction of Three Primary Aromatic Amines Based on Molecularly Imprinted Polymer Monolith for the Migration Detection in Food Contact Materials. Microchem J 2022. [DOI: 10.1016/j.microc.2022.107895] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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Shen L, Zhang J, Dang X, Chen H, Yuan H. Preparation and application of a nanocomposite of dopamine modified zirconium metal organic framework and polythiophene for solid-phase microextraction/gas chromatography of phenols released from polycarbonate materials. J Chromatogr A 2022; 1676:463187. [DOI: 10.1016/j.chroma.2022.463187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2022] [Revised: 05/24/2022] [Accepted: 05/31/2022] [Indexed: 11/28/2022]
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Lyu H, Wu X, Yang Y, Chen H, Dang X, Liu X. Preparation, characterization and application of double yolk–shell structure magnetic molecularly imprinted polymers for extraction of 17β-estradiol. NEW J CHEM 2022. [DOI: 10.1039/d2nj00237j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Novel double yolk–shell structure molecularly imprinted polymers were synthesized by surface polymerization with 17β-estradiol as the template, followed by chemical etching.
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Affiliation(s)
- Hui Lyu
- Collaborative Innovation Center for Advanced Organic Chemical Materials Co-constructed by the Province and Ministry, Hubei Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules & College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430063, China
| | - Xinze Wu
- Collaborative Innovation Center for Advanced Organic Chemical Materials Co-constructed by the Province and Ministry, Hubei Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules & College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430063, China
| | - Yinpeng Yang
- Collaborative Innovation Center for Advanced Organic Chemical Materials Co-constructed by the Province and Ministry, Hubei Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules & College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430063, China
| | - Huaixia Chen
- Collaborative Innovation Center for Advanced Organic Chemical Materials Co-constructed by the Province and Ministry, Hubei Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules & College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430063, China
| | - Xueping Dang
- Collaborative Innovation Center for Advanced Organic Chemical Materials Co-constructed by the Province and Ministry, Hubei Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules & College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430063, China
| | - Xiaolan Liu
- Collaborative Innovation Center for Advanced Organic Chemical Materials Co-constructed by the Province and Ministry, Hubei Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules & College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430063, China
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Zhang J, Ma X, Dang X, Chen H, Hu Y. Adsorption mechanism of polycyclic aromatic hydrocarbons on polythiophene-graphene covalent complex and its analytical application in food contact materials. Microchem J 2021. [DOI: 10.1016/j.microc.2021.106767] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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Zhang J, Dang X, Dai J, Hu Y, Chen H. Simultaneous detection of eight phenols in food contact materials after electrochemical assistance solid-phase microextraction based on amino functionalized carbon nanotube/polypyrrole composite. Anal Chim Acta 2021; 1183:338981. [PMID: 34627510 DOI: 10.1016/j.aca.2021.338981] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2021] [Revised: 08/18/2021] [Accepted: 08/19/2021] [Indexed: 01/10/2023]
Abstract
An electrochemical assistance solid-phase microextraction (EA-SPME) was developed based on amino functionalized multi-walled carbon nanotube/polypyrrole (MWCNTs-NH2/PPy) composite coating. It was applied for the extraction of eight phenols in food contact material, including 2-chlorophenol, o-cresol, m-cresol, 2,4-dichlorophenol, 4-tert-butylphenol, 4-chlorophenol, 4-tertoctylphenol and alpha-naphthol. MWCNTs-NH2/PPy coating was characterized by scanning electron microscopy, transmission electron microscope, X-ray energy spectrometer, X-ray diffraction, Fourier transform infrared and thermogravimetric analysis. The adsorption mechanism of phenols on the composite coatings was investigated. The coating modified steel-wire as an extraction fiber has good electroconductibility, reproducibility and long service life. A determination method for the eight phenols was established by EA-SPME coupled with gas chromatography-flame ionization detection. Under the optimal experimental conditions (extraction temperature: 40 °C; extraction time: 30 min; stirring rate: 600 rpm; NaCl concentration: 0.15 g mL-1; desorption temperature: 250 °C and desorption time: 4 min), the detection linear range was 0.005-50 μg L-1 (R2>0.99), and the detection limit was 0.001-0.1 μg L-1 (S/N = 3). For the quintuple analysis of 50 μg L-1 phenols, the single fiber RSDs were 2.2-12.4%, and the fiber-to-fiber RSDs were 1.9-10.5%. The method was used to detect the migration quantity of the eight phenols from five canned packaging materials, which showed satisfactory recovery 87.3-118.9%.
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Affiliation(s)
- Jiayang Zhang
- Collaborative Innovation Center for Advanced Organic Chemical Materials Co-constructed by the Province and Ministry, Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules & College of Chemistry and Chemical Engineering, Hubei University, Wuhan, 430062, PR China
| | - Xueping Dang
- Collaborative Innovation Center for Advanced Organic Chemical Materials Co-constructed by the Province and Ministry, Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules & College of Chemistry and Chemical Engineering, Hubei University, Wuhan, 430062, PR China.
| | - Jiahuan Dai
- Collaborative Innovation Center for Advanced Organic Chemical Materials Co-constructed by the Province and Ministry, Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules & College of Chemistry and Chemical Engineering, Hubei University, Wuhan, 430062, PR China
| | - Yuling Hu
- School of Chemistry, Sun Yat-sen University, Guangzhou, 510275, PR China.
| | - Huaixia Chen
- Collaborative Innovation Center for Advanced Organic Chemical Materials Co-constructed by the Province and Ministry, Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules & College of Chemistry and Chemical Engineering, Hubei University, Wuhan, 430062, PR China
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Wu X, Cao Y, Sun B, Chen H, Dang X, Liu X, Ai Y. Magnetic Fe 3O 4@SiO 2@β-cyclodextrin for solid phase extraction of methyl parathion and fenthion in lettuce samples. Anal Methods 2021; 13:2974-2980. [PMID: 34114573 DOI: 10.1039/d1ay00681a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
In this study, magnetic Fe3O4@SiO2@β-cyclodextrin copolymerized microparticles were synthesized and applied for the extraction of methyl parathion and fenthion in lettuce samples followed by HPLC-UV detection. The magnetic β-cyclodextrin copolymerized microparticles were prepared by dispersion polymerization with acryloyl β-cyclodextrin as the functional monomer and ethylene glycol dimethyacrylate as the crosslinker. The composite magnetic microparticles were characterized by Fourier transform infrared spectroscopy, X-ray diffraction, magnetic measurement, and thermogravimetric analysis, and used as the adsorbent of magnetic solid-phase extraction (MSPE) for methyl parathion and fenthion. The extraction conditions including sample pH and ionic strength, desorption solvent type and volume, and adsorption and desorption times were optimized. Under the optimal extraction conditions, an MSPE-HPLC-UV method was developed for the detection of methyl parathion and fenthion in lettuce. Wide linear ranges of 1.0-200 μg kg-1 (R2 = 0.9998) for methyl parathion and 1.5-200 μg kg-1 (R2 = 0.9978) for fenthion were obtained and the limits of detection were 0.3 μg kg-1 for methyl parathion and 0.5 μg kg-1 for fenthion in lettuce, respectively. The proposed method was applied for the determination of methyl parathion and fenthion in lettuce with satisfactory recoveries between 89.2-101.2%, and relative standard deviations were less than 9.1%. Thus, the MSPE-HPLC-UV method has high accuracy and sensitivity for the analysis of methyl parathion and fenthion in lettuce samples.
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Affiliation(s)
- Xinze Wu
- Collaborative Innovation Center for Advanced Organic Chemical Materials Co-constructed by the Province and Ministry, Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, China.
| | - Yifei Cao
- Collaborative Innovation Center for Advanced Organic Chemical Materials Co-constructed by the Province and Ministry, Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, China.
| | - Bin Sun
- Collaborative Innovation Center for Advanced Organic Chemical Materials Co-constructed by the Province and Ministry, Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, China.
| | - Huaixia Chen
- Collaborative Innovation Center for Advanced Organic Chemical Materials Co-constructed by the Province and Ministry, Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, China.
| | - Xueping Dang
- Collaborative Innovation Center for Advanced Organic Chemical Materials Co-constructed by the Province and Ministry, Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, China.
| | - Xiaolan Liu
- Collaborative Innovation Center for Advanced Organic Chemical Materials Co-constructed by the Province and Ministry, Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, China.
| | - Youhong Ai
- Collaborative Innovation Center for Advanced Organic Chemical Materials Co-constructed by the Province and Ministry, Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, China.
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Song J, Wu J, Poulet B, Liang J, Bai C, Dang X, Wang K, Fan L, Liu R. Proteomics analysis of hip articular cartilage identifies differentially expressed proteins associated with osteonecrosis of the femoral head. Osteoarthritis Cartilage 2021; 29:1081-1092. [PMID: 33892138 DOI: 10.1016/j.joca.2021.04.005] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/06/2020] [Revised: 03/16/2021] [Accepted: 04/12/2021] [Indexed: 02/06/2023]
Abstract
OBJECTIVE The cartilage degeneration that accompanies subchondral bone necrosis plays an important role in the development of osteonecrosis of femoral head (ONFH). To better understand the molecular basis of cartilage degradation in ONFH, we compared the proteomic profiles of ONFH cartilage with that of fracture control. DESIGN Hip cartilage samples were collected from 16 ONFH patients and 16 matched controls with femoral neck fracture. Proteomics analysis was conducted using tandem mass tag-based quantitation technique. Gene ontology (GO) analysis, KEGG pathway and protein-protein interaction analysis were used to investigate the functions of the altered proteins and biological pathways. Differentially expressed proteins including alpha-2-HS-glycoprotein (AHSG) and Cytokine-like protein 1 (Cytl1) were validated by Western blot (WB) and immunohistochemistry (IHC). RESULTS 303 differentially expressed proteins were identified in ONFH cartilage with 72 up-regulated and 231 down-regulated. Collagen turnover, glycosaminoglycan biosynthesis, metabolic pathways, and complement and coagulation cascades were significantly modified in ONFH cartilage. WB and IHC confirmed the increased expression of AHSG and decreased expression of Cytl1 in ONFH cartilage. CONCLUSIONS Our results reveal the implication of altered protein expression in the development of ONFH, and provide novel clues for pathogenesis studies of cartilage degradation in ONFH.
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Affiliation(s)
- J Song
- Department of Orthopaedics, The Second Affiliated Hospital, Xi'an Jiaotong University, NO.157, Xiwu Road, Xi'an, Shaanxi, 710004, PR China.
| | - J Wu
- Department of Orthopaedics, The Second Affiliated Hospital, Xi'an Jiaotong University, NO.157, Xiwu Road, Xi'an, Shaanxi, 710004, PR China; Department of Orthopaedics, Luoyang Central Hospital Affiliated to Zhengzhou University, Luoyang, Henan Province, 471009, PR China.
| | - B Poulet
- Institute of Ageing and Chronic Disease, University of Liverpool, William Henry Duncan Building, West Derby Road, Liverpool, L7 8TX, UK.
| | - J Liang
- Department of Orthopaedics, The Second Affiliated Hospital, Xi'an Jiaotong University, NO.157, Xiwu Road, Xi'an, Shaanxi, 710004, PR China.
| | - C Bai
- Department of Orthopaedics, The Second Affiliated Hospital, Xi'an Jiaotong University, NO.157, Xiwu Road, Xi'an, Shaanxi, 710004, PR China.
| | - X Dang
- Department of Orthopaedics, The Second Affiliated Hospital, Xi'an Jiaotong University, NO.157, Xiwu Road, Xi'an, Shaanxi, 710004, PR China.
| | - K Wang
- Department of Orthopaedics, The Second Affiliated Hospital, Xi'an Jiaotong University, NO.157, Xiwu Road, Xi'an, Shaanxi, 710004, PR China.
| | - L Fan
- Department of Orthopaedics, The Second Affiliated Hospital, Xi'an Jiaotong University, NO.157, Xiwu Road, Xi'an, Shaanxi, 710004, PR China.
| | - R Liu
- Department of Orthopaedics, The Second Affiliated Hospital, Xi'an Jiaotong University, NO.157, Xiwu Road, Xi'an, Shaanxi, 710004, PR China; Institute of Ageing and Chronic Disease, University of Liverpool, William Henry Duncan Building, West Derby Road, Liverpool, L7 8TX, UK.
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Peng F, Tan Y, Zhang S, Yu X, Chen H, Dang X, Liu X. Moisture-sensitive metal-organic framework constructed from cobalt and 4-(4-pyridyl) benzoic acid for dispersive solid-phase extraction of polycyclic aromatic hydrocarbons in apple. J Sep Sci 2021; 44:1706-1715. [PMID: 33624922 DOI: 10.1002/jssc.202001158] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Revised: 02/16/2021] [Accepted: 02/18/2021] [Indexed: 11/07/2022]
Abstract
A moisture-sensitive metal-organic framework CoII (pybz)2 ·2DMF was synthesized and applied as the adsorbent of dispersive solid-phase extraction. The structure changed after water treatment due to the fact that two chelate carboxylate groups on the skeleton were transformed to monodentate because of the coordination of water molecules. The material showed good adsorption for fluorene, phenanthrene, fluoranthene, and pyrene in water because of the π-π conjugation and π-complexation effects. Coupled with high-performance liquid chromatography, a dispersive solid-phase extraction method of determining the content of fluorene, phenanthrene, fluoranthene, and pyrene in apple samples was established after optimizing the extraction conditions. Methanol containing 4% acetic acid was used as the effective eluent. The linearities were 0.5-1000 μg/kg for fluorene, phenanthrene and 5-1000 μg/kg for fluoranthene, pyrene. The limits of detection were 0.06-0.6 μg/kg, and the recoveries were 94.4-116.4%. The method has a high sensitivity for the determination of four polycyclic aromatic hydrocarbons in apple samples.
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Affiliation(s)
- Fan Peng
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules & College of Chemistry and Chemical Engineering, Hubei University, Wuhan, P. R. China
| | - Yuyan Tan
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules & College of Chemistry and Chemical Engineering, Hubei University, Wuhan, P. R. China
| | - Shanshan Zhang
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules & College of Chemistry and Chemical Engineering, Hubei University, Wuhan, P. R. China
| | - Xiaofang Yu
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules & College of Chemistry and Chemical Engineering, Hubei University, Wuhan, P. R. China
| | - Huaixia Chen
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules & College of Chemistry and Chemical Engineering, Hubei University, Wuhan, P. R. China
| | - Xueping Dang
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules & College of Chemistry and Chemical Engineering, Hubei University, Wuhan, P. R. China
| | - Xiaolan Liu
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules & College of Chemistry and Chemical Engineering, Hubei University, Wuhan, P. R. China
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Wu Y, Liu C, Liu X, Zhu C, Dang X, Hu S, Zheng D. Amperometric Biomedical Sensor for the Determination of Nitric Oxide Using an Electrochemically Activated and Modified Pencil Graphite Electrode. ANAL LETT 2021. [DOI: 10.1080/00032719.2021.1877297] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Ying Wu
- College of Biomedical Engineering, South-Central University for Nationalities, Wuhan, China
- The First Hospital of Wuhan City, Wuhan, China
| | - Chao Liu
- College of Biomedical Engineering, South-Central University for Nationalities, Wuhan, China
- Key Laboratory of Brain Cognitive Science (South-Central University for Nationalities), State Ethnic Affairs Commission, Wuhan, China
- Hubei Key Laboratory of Medical Information Analysis and Tumor Diagnosis and Treatment, Wuhan, China
| | - Xiaojun Liu
- College of Biomedical Engineering, South-Central University for Nationalities, Wuhan, China
- Key Laboratory of Brain Cognitive Science (South-Central University for Nationalities), State Ethnic Affairs Commission, Wuhan, China
- Hubei Key Laboratory of Medical Information Analysis and Tumor Diagnosis and Treatment, Wuhan, China
| | - Chunnan Zhu
- College of Biomedical Engineering, South-Central University for Nationalities, Wuhan, China
- Key Laboratory of Brain Cognitive Science (South-Central University for Nationalities), State Ethnic Affairs Commission, Wuhan, China
- Hubei Key Laboratory of Medical Information Analysis and Tumor Diagnosis and Treatment, Wuhan, China
| | - Xueping Dang
- Hubei Key Laboratory of Medical Information Analysis and Tumor Diagnosis and Treatment, Wuhan, China
| | - Shengshui Hu
- College of Chemistry and Molecule Science, Wuhan University, Wuhan, China
| | - Dongyun Zheng
- College of Biomedical Engineering, South-Central University for Nationalities, Wuhan, China
- Key Laboratory of Brain Cognitive Science (South-Central University for Nationalities), State Ethnic Affairs Commission, Wuhan, China
- Hubei Key Laboratory of Medical Information Analysis and Tumor Diagnosis and Treatment, Wuhan, China
- College of Chemistry and Molecule Science, Wuhan University, Wuhan, China
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Zhang J, Zhang B, Dang X, Song Z, Hu Y, Chen H. A polythiophene/UiO-66 composite coating for extraction of volatile organic compounds migrated from ion-exchange resins prior to their determination by gas chromatography. J Chromatogr A 2020; 1633:461627. [PMID: 33128970 DOI: 10.1016/j.chroma.2020.461627] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Revised: 10/05/2020] [Accepted: 10/07/2020] [Indexed: 02/07/2023]
Abstract
A Poly (3,4-ethylenedioxothiophene) (PEDOT)/UiO-66 composite was electrodeposited on an etched stainless-steel wire as head-space solid-phase microextraction (HS-SPME) coating. A robust, well controlled thickness, and uniform coating of metal organic framework composites can be realized by the electrodeposited strategy. The incorporated UiO-66 not only enhanced the uniformity and stability of the composite coating, but also effectively decreased the stacking phenomenon of PEDOT and improved its extraction efficiency, which was over 100 times higher than that of the PEDOT coating without UiO-66. The composite coating was used to enrich seven types of volatile organic compounds (VOCs) in ion-exchange resins, including methyl cyclohexane, benzene, toluene, ortho-xylene, styrene, para-xylene and divinyl-benzene. The results of adsorption isotherm analysis showed that π stacking effect played dominant role between the composite coating and VOCs in the extraction process. The composite coating was characterized by scanning electron microscopy, X-ray diffraction, Fourier transform infrared and thermogravimetric analysis, respectively. A determination method for seven kinds of VOCs was established by HS-SPME coupled with gas chromatography-flame ionization detection (GC-FID). Under the optimal experimental conditions, the detection linear range (LRs) was 0.09-100 ng mL-1, and the detection limit (LODs) was 0.03-0.06 ng mL-1 (S/N = 3). The method was applied for the migration detection of VOCs in four types of ion-exchange resin, which showed satisfactory recovery (84.5-117.2%).
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Affiliation(s)
- Jiayang Zhang
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules & College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, PR China
| | - Birong Zhang
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules & College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, PR China
| | - Xueping Dang
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules & College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, PR China.
| | - Zhiyong Song
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules & College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, PR China
| | - Yuling Hu
- School of Chemistry, Sun Yat-sen University, Guangzhou 510275, PR China.
| | - Huaixia Chen
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules & College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, PR China
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Guo H, Wang P, Chang J, Yin Q, Liu C, Li M, Dang X, Lu F. Effect of processed maize stover as an alternative energy source in swine production. J Anim Feed Sci 2020. [DOI: 10.22358/jafs/124044/2020] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Ma Q, Liu X, Zhang Y, Chen L, Dang X, Ai Y, Chen H. Fe
3
O
4
nanoparticles coated with polyhedral oligomeric silsesquioxanes and β‐cyclodextrin for magnetic solid‐phase extraction of carbaryl and carbofuran. J Sep Sci 2020; 43:1514-1522. [DOI: 10.1002/jssc.201900896] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2019] [Revised: 01/09/2020] [Accepted: 01/09/2020] [Indexed: 01/17/2023]
Affiliation(s)
- Qiong Ma
- Hubei Collaborative Innovation Center for Advanced Organic Chemical MaterialsMinistry‐of‐Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical EngineeringHubei University Wuhan P. R. China
| | - Xiaolan Liu
- Hubei Collaborative Innovation Center for Advanced Organic Chemical MaterialsMinistry‐of‐Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical EngineeringHubei University Wuhan P. R. China
| | - Yingying Zhang
- Hubei Collaborative Innovation Center for Advanced Organic Chemical MaterialsMinistry‐of‐Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical EngineeringHubei University Wuhan P. R. China
| | - Ling Chen
- Hubei Collaborative Innovation Center for Advanced Organic Chemical MaterialsMinistry‐of‐Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical EngineeringHubei University Wuhan P. R. China
| | - Xueping Dang
- Hubei Collaborative Innovation Center for Advanced Organic Chemical MaterialsMinistry‐of‐Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical EngineeringHubei University Wuhan P. R. China
| | - Youhong Ai
- Hubei Collaborative Innovation Center for Advanced Organic Chemical MaterialsMinistry‐of‐Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical EngineeringHubei University Wuhan P. R. China
| | - Huaixia Chen
- Hubei Collaborative Innovation Center for Advanced Organic Chemical MaterialsMinistry‐of‐Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical EngineeringHubei University Wuhan P. R. China
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18
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Huang P, Zhang B, Dang X, Chen H, Zheng D. Iron-based mimetic enzyme sensor for NO photorelease from sodium nitroprusside. J Electroanal Chem (Lausanne) 2020. [DOI: 10.1016/j.jelechem.2020.113890] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Chen J, Zhang B, Dang X, Zheng D, Ai Y, Chen H. A nanocomposite consisting of etched multiwalled carbon nanotubes, amino-modified metal-organic framework UiO-66 and polyaniline for preconcentration of polycyclic aromatic hydrocarbons prior to their determination by HPLC. Mikrochim Acta 2020; 187:78. [DOI: 10.1007/s00604-019-3997-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2019] [Accepted: 11/03/2019] [Indexed: 10/25/2022]
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Ma Q, Zhang Y, Dang X, Huang J, Ai Y, Chen H. Adsorption Behavior of Polycyclic Aromatic Hydrocarbons on Zn-Based Coordination Cluster Zn 5: Competition, Synergy, and Mechanism. Langmuir 2019; 35:16071-16078. [PMID: 31743031 DOI: 10.1021/acs.langmuir.9b01337] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
In this work, adsorption behaviors of pyrene (PYR), fluoranthene (FLT), phenanthrene (PHE), and fluorene (FLU) on the coordination cluster [Zn5(H2Ln)6](NO3)4]·8H2O·2CH3OH (Zn5) were studied. The adsorption mechanism and spectrum analyses revealed that the synergistic effect of hydrophobic interaction, π-π stacking, and N-H···π interaction played a crucial role during the adsorption process. The maximum adsorption capacities of PYR, FLT, PHE, and FLU were 406.4, 399.7, 153.7, and 114.3 mg g-1, respectively, resulting from the Langmuir isotherm model. Quick removal of PYR and FLT was found in kinetic experiments with the adsorption equilibrium being reached within 1 min. Competitive adsorption indicated that the adsorption sites for PYR, FLT, PHE, and FLU on Zn5 were identical, and synergistic effects also existed in the adsorption process. Therefore, Zn5 has the potential to be used as an adsorbent in the field of wastewater treatment.
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Affiliation(s)
- Qiong Ma
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules & College of Chemistry and Chemical Engineering , Hubei University , Wuhan 430062 , China
| | - Yingying Zhang
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules & College of Chemistry and Chemical Engineering , Hubei University , Wuhan 430062 , China
| | - Xueping Dang
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules & College of Chemistry and Chemical Engineering , Hubei University , Wuhan 430062 , China
| | - Jianlin Huang
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules & College of Chemistry and Chemical Engineering , Hubei University , Wuhan 430062 , China
| | - Youhong Ai
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules & College of Chemistry and Chemical Engineering , Hubei University , Wuhan 430062 , China
| | - Huaixia Chen
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules & College of Chemistry and Chemical Engineering , Hubei University , Wuhan 430062 , China
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Dorschner R, Dang X, Eliceiri B, Baird A. 978 CD44 expression on leukocytes is dynamically regulated by ECRG4. J Invest Dermatol 2019. [DOI: 10.1016/j.jid.2019.03.1054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Ma X, Huang P, Dang X, Ai Y, Zheng D, Chen H. MWCNTs/MnO2 nanocomposite-based polythiophene coating for solid-phase microextraction and determination of polycyclic aromatic hydrocarbons in soil. Microchem J 2019. [DOI: 10.1016/j.microc.2019.02.031] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Chen L, Li M, Ai Y, Dang X, Huang J, Chen H. One-pot preparation of an acryloyled β-cyclodextrin-silica hybrid monolithic column and its application for determination of carbendazim and carbaryl. Food Chem 2018; 269:181-186. [DOI: 10.1016/j.foodchem.2018.07.006] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2017] [Revised: 05/10/2018] [Accepted: 07/01/2018] [Indexed: 12/26/2022]
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Chen L, Dang X, Ai Y, Chen H. Preparation of an acryloyl β-cyclodextrin-silica hybrid monolithic column and its application in pipette tip solid-phase extraction and HPLC analysis of methyl parathion and fenthion. J Sep Sci 2018; 41:3508-3514. [DOI: 10.1002/jssc.201701273] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Revised: 04/09/2018] [Accepted: 04/09/2018] [Indexed: 11/05/2022]
Affiliation(s)
- Ling Chen
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials; Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules & College of Chemistry and Chemical Engineering; Hubei University; Wuhan China
| | - Xueping Dang
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials; Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules & College of Chemistry and Chemical Engineering; Hubei University; Wuhan China
| | - Youhong Ai
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials; Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules & College of Chemistry and Chemical Engineering; Hubei University; Wuhan China
| | - Huaixia Chen
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials; Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules & College of Chemistry and Chemical Engineering; Hubei University; Wuhan China
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Zhou C, Chen J, Dang X, Ma X, Ai Y, Huang J, Chen H. A Selective Joint Determination of Salicylic Acid in Actinidia chinensis Combining a Molecularly Imprinted Monolithic Column and a Graphene Oxide Modified Electrode. ANAL SCI 2018; 34:823-829. [PMID: 29998965 DOI: 10.2116/analsci.18p025] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
A new combination between selective polymer monolith microextraction (PMME) and sensitive differential pulse voltammetry (DPV) was developed for the determination of the phytohormone salicylic acid (SA) in Actinidia chinensis. A molecularly imprinted monolithic column (MIMC) thermally in-situ polymerized in a micropipette tip by using SA as a template, 4-vinyl pyridine (4-VP) as a functional monomer and ethylene glycol dimethacrylate (EGDMA) as a cross-linker in the mixed porogen of toluene and dodecanol, was employed for the microextraction of SA. The prepared MIMC was characterized by a Fourier transform infrared spectrometer (FI-TR), scanning electron microscope (SEM) and thermo gravimetric analysis (TGA). The results confirmed the binary continuous structure of the porous network. The extracted SA was determined by DPV on a graphene oxide (GO) modified electrode. The joint conditions between MIMC and DPV were investigated practically. Under the optimum conditions, SA could be determined selectively and sensitively in a linear range from 0.1 to 60.0 μg g-1. The limit of detection was 0.03 μg g-1 and the recoveries were between 86.2 and 105.2%. The proposed joint method was successfully used to determine SA in Actinidia chinensis.
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Affiliation(s)
- Can Zhou
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules & College of Chemistry and Chemical Engineering, Hubei University
| | - Jianxiong Chen
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules & College of Chemistry and Chemical Engineering, Hubei University.,Hubei Key Laboratory of Medical Information Analysis and Tumor Diagnosis & Treatment
| | - Xueping Dang
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules & College of Chemistry and Chemical Engineering, Hubei University.,Hubei Key Laboratory of Medical Information Analysis and Tumor Diagnosis & Treatment
| | - Xiwen Ma
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules & College of Chemistry and Chemical Engineering, Hubei University.,Hubei Key Laboratory of Medical Information Analysis and Tumor Diagnosis & Treatment
| | - Youhong Ai
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules & College of Chemistry and Chemical Engineering, Hubei University
| | - Jianlin Huang
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules & College of Chemistry and Chemical Engineering, Hubei University
| | - Huaixia Chen
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules & College of Chemistry and Chemical Engineering, Hubei University
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Chen D, Han X, Wang Q, Xie L, Ai Y, Dang X, Huang J, Chen H. Magnetic molecularly imprinted polymers for selective extraction and determination of naphthols. Mikrochim Acta 2017. [DOI: 10.1007/s00604-017-2346-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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Sun B, Wang C, Wang Q, Chen L, Dang X, Huang J, Chen H. Preparation of Acryloyl β-Cyclodextrin Organic Polymer Monolithic Column and Its Application in Solid-Phase Microextraction and HPLC Analysis for Carbofuran and Carbaryl in Rice. FOOD ANAL METHOD 2017. [DOI: 10.1007/s12161-017-0931-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Wang W, Qu X, Dang X, Shang D, Yang L, Li Y, Xu D, Martin JG, Hamid Q, Liu J, Chang Y. Human β-defensin-3 induces IL-8 release and apoptosis in airway smooth muscle cells. Clin Exp Allergy 2017; 47:1138-1149. [PMID: 28437599 DOI: 10.1111/cea.12943] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2017] [Revised: 04/12/2017] [Accepted: 04/14/2017] [Indexed: 12/23/2022]
Abstract
BACKGROUND Human airway smooth muscle cells (ASMCs) may have a pro-inflammatory role through the release of inflammatory mediators. Increasing evidence indicates that human β-defensins (HBDs) are related to pathogenesis of asthma. OBJECTIVES To examine the plasma level of HBD-1, HBD-2 and HBD-3 in asthmatic patients and the expression of their mouse orthologues in the lung tissue of a mouse model of chronic severe asthma. Further to investigate the effect of HBD-3 on the release of the pro-inflammatory cytokine IL-8 and to explore the mechanisms. METHODS The plasma levels of HBD-1, HBD-2 and HBD-3 from 34 healthy controls and 25 asthmatic patients were determined by ELISA. The expression of mouse β-defensins MBD-1, MBD-3 and MBD-14 in the lung tissue of asthmatic mice was detected by Western blot. The ASMCs were cultured with HBD-3 for 24 hour, and then the supernatant level of IL-8 was evaluated by ELISA and the cell viability was examined by WST-1 assay. The signalling pathway was investigated with blocking antibodies or pharmacological inhibitors. RESULTS The plasma levels of HBD-1 and HBD-3 were elevated in asthmatic patients, and the expression of MBD-14, the mouse orthologue for HBD-3, was increased in asthmatic mice. HBD-3-induced IL-8 production in a CCR6 receptor-specific manner and was dependent on multiple signalling pathways. Moreover, HBD-3-induced cell apoptosis concurrently, which was dependent on the ERK1/2 MAPK pathway. Mitochondrial ROS regulated both HBD-3-induced IL-8 production and cell apoptosis. CONCLUSIONS AND CLINICAL RELEVANCE These observations provide clear evidence of an important new mechanism for the promotion of airway inflammation and tissue remodelling with potential relevance for the treatment of asthma.
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Affiliation(s)
- W Wang
- Center for Translational Medicine, The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology and Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, China
| | - X Qu
- Center for Translational Medicine, The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology and Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, China
| | - X Dang
- Department of Respiration, The First Affiliated Hospital, Xi'an Jiaotong University, Xi'an, China
| | - D Shang
- Department of Respiration, The First Affiliated Hospital, Xi'an Jiaotong University, Xi'an, China
| | - L Yang
- Center for Mitochondrial Biology and Medicine, The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology and Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, China
| | - Y Li
- Center for Translational Medicine, The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology and Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, China
| | - D Xu
- Center for Translational Medicine, The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology and Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, China
| | - J G Martin
- Meakins-Christie Laboratories and Respiratory Division, The Research Institute of the McGill University Health Centre and Department of Medicine, McGill University, Montreal, Quebec, Canada
| | - Q Hamid
- Meakins-Christie Laboratories and Respiratory Division, The Research Institute of the McGill University Health Centre and Department of Medicine, McGill University, Montreal, Quebec, Canada.,College of Medicine, University of Sharjah, Sharjah, United Arab Emirates
| | - J Liu
- Center for Mitochondrial Biology and Medicine, The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology and Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, China
| | - Y Chang
- Center for Translational Medicine, The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology and Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, China
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Ma X, Feng F, Yang Y, Dang X, Huang J, Chen H. Magnetic Solid-Phase Extraction of N,N-Diethyl-m-Toluamide From Baby Toilet Water Prior to its HPLC–UV Detection. J Chromatogr Sci 2017; 55:662-668. [DOI: 10.1093/chromsci/bmx015] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2016] [Accepted: 02/21/2017] [Indexed: 11/15/2022]
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Abstract
Topological insulators are very interesting from a fundamental point of view, and their unique properties may be useful for electronic and spintronic device applications. From the point of view of applications it is important to understand the decay behavior of carriers injected in the band gap of the topological insulator, which is determined by its complex band structure (CBS). Using first-principles calculations, we investigate the dispersion and symmetry of the complex bands of Bi2Se3 family of three-dimensional topological insulators. We compare the CBS of a band insulator and a topological insulator and follow the CBS evolution in both when the spin-orbit interaction is turned on. We find significant differences in the CBS linked to the topological band structure. In particular, our results demonstrate that the evanescent states in Bi2Se3 are non-trivially complex, i.e. contain both the real and imaginary contributions. This explains quantitatively the oscillatory behavior of the band gap obtained from Bi2Se3 (0 0 0 1) slab calculations.
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Affiliation(s)
- J Betancourt
- Department of Physics and Astronomy, University of Puerto Rico, San Juan, PR 00931, USA
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Yang Y, Ma X, Feng F, Dang X, Huang J, Chen H. Magnetic solid-phase extraction of triclosan using core-shell Fe3O4@MIL-100 magnetic nanoparticles, and its determination by HPLC with UV detection. Mikrochim Acta 2016. [DOI: 10.1007/s00604-016-1872-x] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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32
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Wang P, Fan C, Chang J, Yin Q, Song A, Dang X, Lu F. Study on effects of microbial fermented soyabean meal on production performances of sows and suckling piglets and its acting mechanism. J Anim Feed Sci 2016. [DOI: 10.22358/jafs/65582/2016] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Li N, Zhu Q, Yang Y, Huang J, Dang X, Chen H. A novel dispersive solid-phase extraction method using metal-organic framework MIL-101 as the adsorbent for the analysis of benzophenones in toner. Talanta 2015; 132:713-8. [DOI: 10.1016/j.talanta.2014.10.038] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2014] [Revised: 10/12/2014] [Accepted: 10/16/2014] [Indexed: 10/24/2022]
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34
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Liu X, Zhu Q, Chen H, Zhou L, Dang X, Huang J. Preparation of 2,4-dichlorophenoxyacetic acid imprinted organic–inorganic hybrid monolithic column and application to selective solid-phase microextraction. J Chromatogr B Analyt Technol Biomed Life Sci 2014; 951-952:32-7. [DOI: 10.1016/j.jchromb.2014.01.010] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2013] [Revised: 01/05/2014] [Accepted: 01/08/2014] [Indexed: 11/30/2022]
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Yang T, Ma C, Chen H, Zhang Y, Dang X, Huang J. A molecularly imprinted organic-inorganic hybrid monolithic column for the selective extraction and HPLC determination of isoprocarb residues in rice. J Sep Sci 2014; 37:587-94. [DOI: 10.1002/jssc.201301227] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2013] [Revised: 12/12/2013] [Accepted: 12/13/2013] [Indexed: 11/11/2022]
Affiliation(s)
- Ting Yang
- Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules; Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials; College of Chemistry and Chemical Engineering; Hubei University; Wuhan China
| | - Chao Ma
- Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules; Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials; College of Chemistry and Chemical Engineering; Hubei University; Wuhan China
| | - Huaixia Chen
- Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules; Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials; College of Chemistry and Chemical Engineering; Hubei University; Wuhan China
| | - Yajie Zhang
- Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules; Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials; College of Chemistry and Chemical Engineering; Hubei University; Wuhan China
| | - Xueping Dang
- Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules; Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials; College of Chemistry and Chemical Engineering; Hubei University; Wuhan China
| | - Jianlin Huang
- Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules; Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials; College of Chemistry and Chemical Engineering; Hubei University; Wuhan China
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36
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Barish M, Weng L, D'Apuzzo M, Forman S, Brown C, Ben Horin I, Volovitz I, Ram Z, Chang A, Wainwright D, Dey M, Han Y, Lesniak M, Chow K, Yi J, Shaffer D, Gottschalk S, Clark A, Safaee M, Oh T, Ivan M, Kaur R, Sun M, Lu YJ, Ozawa T, James CD, Bloch O, Parsa A, Debinski W, Choi YA, Gibo DM, Dey M, Wainwright D, Chang A, Han Y, Lesniak M, Herold-Mende C, Mossemann J, Jungk C, Ahmadi R, Capper D, von Deimling A, Unterberg A, Beckhove P, Jiang H, Klein SR, Piya S, Vence L, Yung WKA, Sawaya R, Heimberger A, Conrad C, Lang F, Gomez-Manzano C, Fueyo J, Jung TY, Choi YD, Kim YH, Lee JJ, Kim HS, Kim JS, Kim SK, Jung S, Cho D, Kosaka A, Ohkuri T, Okada H, Erickson K, Malone C, Ha E, Soto H, Hickey M, Owens G, Liau L, Prins R, Minev B, Kruse C, Lee J, Dang X, Borboa A, Coimbra R, Baird A, Eliceiri B, Mathios D, Lim M, Ruzevick J, Nicholas S, Polanczyk M, Jackson C, Taube J, Burger P, Martin A, Xu H, Ochs K, Sahm F, Opitz CA, Lanz TV, Oezen I, Couraud PO, von Deimling A, Wick W, Platten M, Ohkuri T, Ghosh A, Kosaka A, Zhu J, Ikeura M, Watkins S, Sarkar S, Okada H, Pellegatta S, Pessina S, Cantini G, Kapetis D, Finocchiaro G, Avril T, Vauleon E, Hamlat A, Mosser J, Quillien V, Raychaudhuri B, Rayman P, Huang P, Grabowski M, Hamburdzumyan D, Finke J, Vogelbaum M, Renner D, Litterman A, Balgeman A, Jin F, Hanson L, Gamez J, Carlson B, Sarkaria J, Parney I, Ohlfest J, Pirko I, Pavelko K, Johnson A, Sims J, Grinshpun B, Feng Y, Amendolara B, Shen Y, Canoll P, Sims P, Bruce J, Lee SX, Wong E, Swanson K, Wainwright D, Chang A, Dey M, Balyasnikova I, Cheng Y, Han Y, Lesniak M, Wang F, Wei J, Xu S, Ling X, Yaghi N, Kong LY, Doucette T, Weinberg J, DeMonte F, Lang F, Prabhu S, Heimberger A, Wiencke J, Accomando W, Houseman EA, Nelson H, Wrensch M, Wiemels J, Zheng S, Hsuang G, Bracci P, Kelsey K. IMMUNOLOGY RESEARCH. Neuro Oncol 2013. [DOI: 10.1093/neuonc/not177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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37
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Dang X, Hu C, Chen Z, Wang S, Hu S. Electrochemical characteristics of cis-jasmone in acid media at multi-wall carbon nanotube-Nafion composite film modified electrode and its analytical application. Electrochim Acta 2012. [DOI: 10.1016/j.electacta.2012.07.049] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Dang X, Hu C, Shen D, Chen Z, Hu S. A novel electrochemical method for determination of cis-jasmone based on enhancement effect of cetyltrimethylammonium bromide. J Electroanal Chem (Lausanne) 2011. [DOI: 10.1016/j.jelechem.2011.03.006] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Kardami E, Banerji S, Doble BW, Dang X, Fandrich RR, Jin Y, Cattini PA. PKC-Dependent Phosphorylation May Regulate the Ability of Connexin43 to Inhibit DNA Synthesis. ACTA ACUST UNITED AC 2009; 10:293-7. [PMID: 14681031 DOI: 10.1080/cac.10.4-6.293.297] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Phosphorylation affects several biological functions of connexin43 (Cx43), although its role on Cx43-mediated inhibition of DNA synthesis is not known. Previous studies showed increased Cx43 phosphorylation on serine in response to growth factor stimulation of cardiomyocytes, mediated by protein kinase C-epsilon (PKCepsilon). Here we report that activation of PKCepsilon is also necessary for stimulation of cardiomyocyte DNA synthesis and mitosis. We have investigated the participation of specific serine residues that are putative PKC targets in producing phosphorylated Cx43 species and also in regulating DNA synthesis in cardiomyocytes. Interference with the PKC signaling system and/or the phosphorylation of specific amino-acids of Cx43 may allow regulation of the mitogenic response.
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Affiliation(s)
- E Kardami
- Institute of Cardiovascular Sciences and Departments of Anatomy and Physiology, University of Manitoba, Winnipeg, Manitoba, Canada.
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40
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Abstract
An acetylene black electrode modified by an adsorbed cationic surfactant, cetyltrimethylammonium bromide (CTAB), was developed. The influences of various types of surfactants on the electroreduction of O2 were investigated. It was demonstrated that a cationic surfactant, CTAB, on the surface of the electrode could significantly decrease the overpotential of dioxygen reduction, and the reduction peak current of O2 was also remarkably increased. The reduction of O2 at a CTAB modified acetylene black electrode was studied using cyclic voltammetry, chronocoulometry and controlled potential coulometry. The total number of electrons, the exchange current density (j(o)) and the transfer coefficient (alpha) for reduction of O2 at the surface of this modified electrode were determined.
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Affiliation(s)
- Xueping Dang
- Department of Chemistry, Wuhan University, Wuhan 430072, China
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41
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Dang X, Hu C, Wei Y, Chen W, Hu S. Sensitivity Improvement of the Oxidation of Tetracycline at Acetylene Black Electrode in the Presence of Sodium Dodecyl Sulfate. ELECTROANAL 2004. [DOI: 10.1002/elan.200403049] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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42
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Lű S, Wu K, Dang X, Hu S. Electrochemical reduction and voltammetric determination of metronidazole at a nanomaterial thin film coated glassy carbon electrode. Talanta 2004; 63:653-7. [DOI: 10.1016/j.talanta.2003.12.005] [Citation(s) in RCA: 88] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2003] [Revised: 11/23/2003] [Accepted: 12/04/2003] [Indexed: 11/28/2022]
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He Q, Dang X, Hu C, Hu S. The effect of cetyltrimethyl ammonium bromide on the electrochemical determination of thyroxine. Colloids Surf B Biointerfaces 2004; 35:93-8. [PMID: 15261041 DOI: 10.1016/j.colsurfb.2004.03.001] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2003] [Revised: 02/12/2004] [Accepted: 03/06/2004] [Indexed: 11/28/2022]
Abstract
Electrochemical behavior of thyroxine at a polyvinylpyrrolidone modified carbon paste electrode in the presence of cetyltrimethyl ammonium bromide was described. Thyroxine underwent totally irreversible oxidation at this system and a well-defined peak at 0.42 V was obtained. The influence of various surfactants on the oxidation of thyroxine was examined by cyclic voltammetry. Chronocoulometry was also used to investigate the electrode process. In the range 2 x 10(-7) to 9 x 10(-6)mol/l, the thyroxine concentration was linear with the oxidation peak current and a low detection limit of 8 x 10(-8) mol/l was obtained for 5 min accumulation.
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Affiliation(s)
- Qiong He
- Department of Chemistry, Wuhan University, Wuhan 430072, China
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45
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Wei Y, Ji X, Dang X, Hu S. Studies on electrochemical properties and scavenge of superoxide anion in aprotic media by using carbon nanotubes powder microelectrode. Bioelectrochemistry 2003; 61:51-6. [PMID: 14642909 DOI: 10.1016/s1567-5394(03)00059-8] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
Multiwall carbon nanotubes (MWCNTs) are filled in the cavity at the tip of a microelectrode to form a carbon nanotubes powder microelectrode (CNTs-PME). CNTs-PME was used to study electrochemical properties of superoxide anion in aprotic media. The reversibility of the oxygen/superoxide anion couple (O(2)/O(2)(.-)) at the different powder microelectrode in different aprotic media was compared by cyclic voltammetry (CV). The result indicated that the nearly reversible redox process of the O(2)/O(2)(.-) couple was obtained at a CNTs-PME. The heterogeneous electron transfer rate constant (k(s)) can be measured by steady-state voltammogram and the result is 4.7 x 10(-3) cm s(-1), suggesting that the electrode reaction is a nearly reversible process as expected. The scavenging activities of bilirubin, alpha-tocopherol (vitamin E), are examined, and the experimental results confirm that alpha-tocopherol is the better scavenger toward O(2)(.-) between them.
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Affiliation(s)
- Yingliang Wei
- Department of Chemistry, Wuhan University, Wuhan 430072, PR China
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46
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Lü S, Dang X, Wu K, Hu S. Electrocatalytic reduction of chloramphenicol at multiwall carbon nanotube-modified electrodes. J Nanosci Nanotechnol 2003; 3:401-405. [PMID: 14733150 DOI: 10.1166/jnn.2003.206] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
A multiwall carbon nanotube-modified glassy carbon (GC) electrode was employed for the investigation of chloramphenicol (CAP) reduction. Carbon nanotube coating can greatly lower the overpotential of the electrochemical reduction of CAP and promote the electrode reaction. CAP undergoes an irreversible reduction process in phosphate buffer by the modified electrode. The reduction peak current (Ip) was significantly increased. Effects of some important factors, including pH, scan rate, and amount of modifier, on the determination of CAP were investigated. In the range of 3 x 10(-7) to 1.2 x 10(-5) M, the reduction peak current (Ip) has a good linear relationship with the concentration of CAP. When the signal-to-noise ratio is 3, the detection limit is 4.5 x 10(-8) M. The relative standard deviation of 10 measurements for 3 x 10(-6) M CAP is 5.3%, suggesting an excellent reproducibility of the modified electrode. Interfering experiments show that the modified electrode has excellent selectivity for the detection of CAP. The modified electrode was used to determine CAP in eyedrops, and the recoveries were approximately 100%.
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Affiliation(s)
- Shaofang Lü
- Department of Chemistry, Wuhan University, Wuhan 430072, Hubei, China
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47
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Dang X, Yi Z, Wang X, Wu X, Zhang X, He Q. [Preventive efficiency of IVIgG on nosocomial infection in the children with nephrotic syndrome]. Hunan Yi Ke Da Xue Xue Bao 2002; 24:290-2. [PMID: 12016811] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
Abstract
In order to study the preventive efficiency of IVIgG on nosocomial infection(NI), 54 cases of the children with nephrotic syndrome(NS) were randomly divided into 2 groups, test group(n = 22) and control group(n = 32). Routine treatment was adopted to all cases. Besides the routine treatment, the test group was injected with IVIgG(100-300 mg.kg-1.d-1) for 2-3 days. The results showed that the NI rate of test group (13.6%) was significantly lower than that of the control(46.88%) (P < 0.05), and the hospital days of the test group(27.33 +/- 15.51) d was significantly shorter than that of the control(64.50 +/- 18.52) d (P < 0.05). These suggest that IVIgG, as one of the ways to prevent NI, can improve the immune state and effectively prevent the NI in the children with NS.
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Affiliation(s)
- X Dang
- Department of Pediatrics, Second Affiliated Hospital, Hunan Medical University, Changsha 410011
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48
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Qian B, Sun Y, Guo Y, Dang X, Ru B. A prourokinase-RGDS chimera : Construction, expression and characterization. Sci China C Life Sci 1999; 42:259-266. [PMID: 20229339 DOI: 10.1007/bf03183601] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/1998] [Indexed: 05/28/2023]
Abstract
A tetrapeptide, RGDS, was inserted into proUK kringle domain G118-L119 by the construction of a mutant proUK-RGDS gene. The gene was expressed in the baculovirus expression system. Immunoaffinity chromatography was used to purify the chimera and protein with purity over 90% was achieved. The chimera was tested for its platelet membrane binding function and showed a calcium-dependent platelet binding activity. Amidolytic activity of the chimera was tested. The result indicated that specific amidolytic activity of plasmin activated chimera was 62 000 IU/mg, comparable to the previously reported 65 355 IU/mg of plasmin activated natural proUK([1]). Activation of plasminogen by the chimera after plasmin treatment followed Michieal-Menten kinetics, and the Km was 0.97 mumol/L, which was also comparable to 1.64 mumol/L of native urokinase. The chimera also showed intensive ability to inhibit platelet aggregationin vitro. These results indicate that this chimera might be useful as a bifunctional thrombolytic agent.
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Affiliation(s)
- B Qian
- National Laboratory of Protein Engineering, Department of Biochemistry and Molecular Biology, Life Science Centre, Peking University, 100871, Beijing, China
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49
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Wang K, Dang X, Wu Y, Liu A, Lei G, Li X, Gao X, Yang D. [Treatment of old femoral neck fracture with implantation of a vascularized fibular graft]. Zhonghua Wai Ke Za Zhi 1998; 36:261-3, 57. [PMID: 11825382] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
OBJECTIVE To investigate the healing of old femoral neck fracture treated with transplantation of vascularized fibula graft accompanied with lag screw, and rehabilitation of and precaution against ischemic necrosis of femoral head. METHOD Vascularized fibula autograft was transplanted to the anterolateral side of the femoral neck with an internal fixator of lag screw. Fibular artery and vein were anastomosed with lateral circumflex artery and vein. RESULT 186 of 229 cases subjected to systemic X-ray films and function follow-up (3 to 15 years). The percentage of fracture healing was 93.0% the sulass rate 86.5%. CONCLUSION Fibula with blood supply and compressed screw have a combined fixation effect of the old femoral neck fracture. Fibula is solid enough for supporting the femoral head and preventing it from collapse. Vascularized fibular grafting provides blood supply to the affected femoral head and neck, promoting femoral head restoration and reconstruction.
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Affiliation(s)
- K Wang
- Orthopaedic Department, Second Affiliated Hospital of Xi'an Medical University, Xi'an 710004
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50
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Li J, Wu X, Dang X, Sun X, Zhao H, Hua Y. [Effect of +Gz-induced cerebral ischemia on the distribution of nitric oxide synthase in rabbit brain]. Space Med Med Eng (Beijing) 1998; 11:102-6. [PMID: 11543224] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/16/2023]
Abstract
In order to study the effect of repeated short termed + Gz -induced cerebral ischemia on rabbit brain, rabbits were exposed to +4.0 Gz for 3 times (with 30 min interval in between) which caused the arterial pressure at eye level dropped to 0 kPa and lasted for 30 s. Changes of distribution of the nitric oxide synthase(NOS) positive neurons in rabbit brain were observed using the NADPH-diaphorase histochemical reaction. The results showed that NOS positive neurons in the parietal cortex, piriform cortex, hippocampus and dentate gyrus increased by 167%, 126%, 321%, 172% (P < 0.01) respectively, immediately after repeated + Gz exposures, as compared with those of controls. It still remained significantly more than that in controls (P < 0.01) 1 h and 6 h after exposure. It suggests that NO may have some effect on the neurons during cerebral ischemia.
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Affiliation(s)
- J Li
- Navy General Hospital, Beijing, China
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