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254 results on '"Chen, Xinguo"'

56. Synthesis of Zirconium Modified Spherical Mesostructured Cellular Silica Foams and Its Hydrodesulfurization Performance for FCC Diesel

Author

Chen Xinguo, Chunming Xu, Bo Wang, Aijun Duan, Qian Meng, Shaotong Song, Dong Wang, Longnian Han, Jianmei Li, and Zhentao Chen

Subjects
Zirconium, Materials science, Silicon, Small-angle X-ray scattering, General Chemical Engineering, Inorganic chemistry, Energy Engineering and Power Technology, chemistry.chemical_element, 02 engineering and technology, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, 0104 chemical sciences, Catalysis, Fuel Technology, chemistry, Chemical engineering, Lewis acids and bases, Fourier transform infrared spectroscopy, 0210 nano-technology, Hydrodesulfurization, Incipient wetness impregnation
Abstract

Zr modified spherical mesostructured cellular silica foams (MCFs) with different Zr contents were successfully synthesized via an incipient wetness impregnation method. The characterization results of FTIR, SEM, and SAXS indicated that zirconium was fabricated into the silicon framework; meanwhile, the parent sphere-like morphology and topological structure were retained. Additionally, BET results showed that the as-synthesized materials possessed ultralarge pore volume (1.56 cm3/g), large pore size (15.9 nm), and high surface area (467 m2/g) when the weight percentage of Zr in the support was 12.6%, demonstrating that MCFs would be an alternative support for hydrotreating catalyst. Furthermore, the corresponding supported NiMo/Zr-MCFs catalysts were well-characterized. It was found that zirconium as an electronic promoter not only facilitated the formation of NiMoO4 precursor but also enhanced the redox ability of the catalysts as well as brought Bronsted and Lewis acid sites into MCFs, which were conduc...

Published
2017
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61. The efficacy of dexketoprofen for migraine attack

Author

Baohua Yang, Xu Zhili, Linglong Chen, Chen Xinguo, and Xie Yuequn

Subjects
medicine.medical_specialty, business.industry, General Medicine, Cochrane Library, Placebo, Dexketoprofen, medicine.disease, law.invention, 03 medical and health sciences, 0302 clinical medicine, Pharmacotherapy, Randomized controlled trial, Migraine, law, 030220 oncology & carcinogenesis, Meta-analysis, Internal medicine, medicine, 030212 general & internal medicine, Adverse effect, business, medicine.drug
Abstract

BACKGROUND The efficacy of dexketoprofen for migraine attack remains controversial. We conduct a systematic review and meta-analysis to explore the influence of dexketoprofen supplementation versus placebo on pain control in migraine attack patients. METHODS We search PubMed, EMbase, Web of science, EBSCO, and Cochrane library databases through March 2019 for randomized controlled trials (RCTs) assessing the effect of dexketoprofen supplementation versus placebo on pain control for migraine attack patients. This meta-analysis is performed using the random-effect model. RESULTS Five RCTs involving 794 patients are included in the meta-analysis. Overall, compared with control group for migraine attack, dexketoprofen supplementation is associated with substantially increased pain free at 2 hours (RR = 1.90; 95% CI = 1.43-2.53; P

Published
2019
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67. Commensal orthologs of the human autoantigen Ro60 as triggers of autoimmunity in lupus

Author

Greiling, Teri M., primary, Dehner, Carina, additional, Chen, Xinguo, additional, Hughes, Kevin, additional, Iñiguez, Alonso J., additional, Boccitto, Marco, additional, Ruiz, Daniel Zegarra, additional, Renfroe, Stephen C., additional, Vieira, Silvio M., additional, Ruff, William E., additional, Sim, Soyeong, additional, Kriegel, Christina, additional, Glanternik, Julia, additional, Chen, Xindi, additional, Girardi, Michael, additional, Degnan, Patrick, additional, Costenbader, Karen H., additional, Goodman, Andrew L., additional, Wolin, Sandra L., additional, and Kriegel, Martin A., additional

Published
2018
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68. One-Step Conversion of Biomass-Derived 5-Hydroxymethylfurfural to 1,2,6-Hexanetriol Over Ni–Co–Al Mixed Oxide Catalysts Under Mild Conditions

Author

Xindong Mu, Xicheng Wang, Shengxi Yao, Feng Wu, Chen Xinguo, and Yijun Jiang

Subjects
chemistry.chemical_classification, Renewable Energy, Sustainability and the Environment, Chemistry, General Chemical Engineering, Inorganic chemistry, General Chemistry, Aldehyde, Catalysis, Adsorption, Desorption, Yield (chemistry), Environmental Chemistry, Mixed oxide, Selectivity, Powder diffraction
Abstract

The conversion of biomass-derived 5-hydroxymethylfurfural (HMF) was examined over Ni Co Al mixed oxide catalysts derived from corresponding hydrotalcite-like compounds (HTlcs). 1,2,6-Hexanetriol (1,2,6-HT) was obtained in 64.5% yield under mild reaction conditions. The catalysts were characterized by X-ray. powder diffraction (XRD), CO2 temperature-programthed desorption (CO2 TPD), N2 physical adsorption, and H2 temperatureprogrammed reduction (H2 TPR), and the reaction product distribution was correlated with the catalyst composition and reaction conditions. The reaction pathway was proposed based on the results. In all cases, the conversion of HMF proceeds according to a pathway that begins with the aldehyde group being hydrogenated to form 2,5-dihydroxymethylfuran (2,5-DHF). This product then undergoes a ring-opening reaction to form 1,2,6-HT. A synergetic effect between Ni and Co was observed, which significantly promoted catalytic activity and selectivity.

Published
2013
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69. Hydrogenolysis of biomass-derived sorbitol to glycols and glycerol over Ni-MgO catalysts

Author

Xindong Mu, Xicheng Wang, Chen Xinguo, and Shengxi Yao

Subjects
Process Chemistry and Technology, Inorganic chemistry, Biomass, General Chemistry, Catalysis, chemistry.chemical_compound, chemistry, Hydrogenolysis, Chemisorption, Glycerol, Sorbitol, Selectivity, Ethylene glycol
Abstract

Ni-MgO catalysts with varying Ni/Mg ratios were prepared by co-precipitation and tested in sorbitol hydrogenolysis. At 473 K and 4 MPa H-2, the best catalyst with Ni/Mg ratio of 3:7 exhibited 67.8% conversion and 80.8% total selectivity of ethylene glycol, 1,2-propylene glycol and glycerol. These catalysts were characterized by XRD, CO2-TPD and H-2 chemisorption, revealing that the activity depended strongly on the basicity and Ni surface area. The reaction conditions were optimized, which were relatively mild for this chemoselective conversion. (C) 2013 Elsevier B.V. All rights reserved.

Published
2013
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72. Commensal Ro60 Orthologs as Persistent Triggers of Human Lupus

Author

Dehner, Carina Anja, primary, Greiling, Teri, additional, Chen, Xinguo, additional, Renfroe, Stephen Chase, additional, Hughes, Kevin, additional, Vieira, Silvio, additional, Ruff, William, additional, Boccitto, Marco, additional, Sim, Soyeong, additional, Chen, Xindi, additional, Kriegel, Christina, additional, Degnan, Patrick, additional, Goodman, Andrew, additional, Wolin, Sandra, additional, and Kriegel, Martin Alexander, additional

Published
2017
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75. A ranking method for multiple attribute decision‐making problems based on the possibility degrees of trapezoidal intuitionistic fuzzy numbers.

Author

Hao, Yonghua, Chen, Xinguo, and Wang, Xuzhu

Subjects
FUZZY numbers, INTUITIONISTIC mathematics, OPERATOR theory, ARITHMETIC mean, MATHEMATICS
Abstract

To solve multiple attribute decision‐making problems with attribute values or decision values characterized by trapezoidal intuitionistic fuzzy numbers (TIFNs), we define a trapezoidal intuitionistic fuzzy induced ordered weighted arithmetic averaging (TIFIOWA) operator, which is an extension of the induced ordered weighted arithmetic averaging operator. We derive and prove some related properties and conclusions of the TIFIOWA operator. To compare the TIFNs, we define possibility degrees of the TIFNs. Based on the possibility degrees of the TIFNs and the TIFIOWA operator, we construct a new method to determine the order of alternatives in multiple attribute decision making and to choose the best alternative. Finally, a numerical example shows that the developed method is feasible and effective. [ABSTRACT FROM AUTHOR]

Published
2019
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76. Tissue-Based Proteogenomics Reveals that Human Testis Endows Plentiful Missing Proteins

Author

Zhang, Yao, primary, Li, Qidan, additional, Wu, Feilin, additional, Zhou, Ruo, additional, Qi, Yingzi, additional, Su, Na, additional, Chen, Lingsheng, additional, Xu, Shaohang, additional, Jiang, Tao, additional, Zhang, Chengpu, additional, Cheng, Gang, additional, Chen, Xinguo, additional, Kong, Degang, additional, Wang, Yujia, additional, Zhang, Tao, additional, Zi, Jin, additional, Wei, Wei, additional, Gao, Yuan, additional, Zhen, Bei, additional, Xiong, Zhi, additional, Wu, Songfeng, additional, Yang, Pengyuan, additional, Wang, Quanhui, additional, Wen, Bo, additional, He, Fuchu, additional, Xu, Ping, additional, and Liu, Siqi, additional

Published
2015
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83. Non-coding Y RNAs as tethers and gates

Author

Wolin, Sandra L, primary, Belair, Cedric, additional, Boccitto, Marco, additional, Chen, Xinguo, additional, Sim, Soyeong, additional, Taylor, David W, additional, and Wang, Hong-Wei, additional

Published
2013
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85. Ruthenium-catalyzed cycloaddition of alkynes and organic azides

Author

Zhang, Li, Chen, Xinguo, Xue, Peng, Sun, H.H.Y., Williams, Ian Duncan, Sharpless, KB, Fokin, VV, Jia, Guochen, Zhang, Li, Chen, Xinguo, Xue, Peng, Sun, H.H.Y., Williams, Ian Duncan, Sharpless, KB, Fokin, VV, and Jia, Guochen

Abstract

Cp*RuCl(PPh3)2 is an effective catalyst for the regioselective "fusion" of organic azides and terminal alkynes, producing 1,5-disubstituted 1,2,3-triazoles. Internal alkynes also participate in this catalysis, resulting in fully substituted 1,2,3-triazoles. Copyright © 2005 American Chemical Society.

Published
2005

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