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Article
Effect of WC-10Co-4Cr Reinforcement Amount on Wear and Corrosion Resistance of Fe-Based Amorphous Coatings
WC-10Co-4Cr/Fe-based amorphous composite coatings with different WC-10Co-4Cr powder contents (0-12 wt.%) were prepared on C45 steel by plasma spraying. The microstructure, hardness, wear resistance and corrosi...
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Article
Open AccessSelective nucleophilic α-C alkylation of phenols with alcohols via Ti=Cα intermediate on anatase TiO2 surface
C−C bond forming reaction by alkylation of aryl rings is a main pillar of chemistry in the production of broad portfolios of chemical products. The dominant mechanism proceeds via electrophilic substitution of...
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Article
Phosphorus Leaching Alleviated by Organic Carbon in Greenhouse Vegetable Production System
Phosphorus (P) is an essential element for crop growth; however, the continued application of P at a rate exceeding crop requirements can increase soil P concentration and the potential for P loss to surface w...
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Article
Demographic history of two endangered Atlantic eel species, Anguilla anguilla and Anguilla rostrata
European (Anguilla anguilla) and American eel (A. rostrata) are panmictic catadromous fish species, which have experienced recent drastic population declines amounting to just a few percent recruitment relative t...
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Article
Pilot Study of a Virtual Reality Educational Intervention for Radiotherapy Patients Prior to Initiating Treatment
Virtual reality (VR) presents opportunities for innovative patient educational methods. This study used a combination of subjective questionnaires and objective physiological measures to investigate the impact...
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Article
IM-5 Zeolite Treated with Mixed Solution of NaOH and TPABr: Characterization and Application for Alkylation of Benzene with Ethanol
IM-5 series zeolites (I-xat-0.05TPABr) were prepared by treating the pristine IM-5 zeolites in a mixed solution of NaOH and TPABr (tetrapropylammonium bromide) with different NaOH concentrations (CNaOH). It was f...
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Article
Comprehensive assessment of peripheral blood TCRβ repertoire in infectious mononucleosis and chronic active EBV infection patients
Epstein-Barr virus (EBV) primary infection is usually asymptomatic, but it sometimes progresses to infectious mononucleosis (IM). Occasionally, some people develop chronic active EBV infection (CAEBV) with und...
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Article
Indigenous arbuscular mycorrhizal fungi can alleviate salt stress and promote growth of cotton and maize in saline fields
The function of indigenous mycorrhizal fungi in improving crop growth is not well addressed because of methodological limitations. In this study, we determined the effects of the indigenous arbuscular mycorrhi...
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Article
Effect of Desilication on the Performance of Hierarchical ZSM-11 Catalysts for Alkylation of Benzene with Dimethyl Ether
Hierarchical ZSM-11 zeolites (Z-xat) were prepared by treating the pristine ZSM-11 zeolite in a solution of NaOH with different concentrations (C NaOH). It was found the porosity and ac...
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Article
Catalytic Degradation of LDPE and PP over MCM-49 Based Micro–Mesoporous Composites
Micro–mesoporous composites were prepared by post-treatment of MCM-49, and applied to degrade low-density polyethylene (LDPE) and polypropylene. It was found that LDPE degradation mainly occurred on the extern...
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Article
Realumination of MCM-22 Zeolite and Its Application in Alkylation Reaction
A mechanism of the realumination process was proposed when MCM-22 was post-treated in Al(NO3)3 solution. Al atoms would deposit into zeolite with the amorphous alumina form, or insert into the framework by substi...
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Article
Improvement of vapor-phase silylation and thermal stability of silylated MCM-22 zeolite
The method of vapor-phase silylation over as-made MCM-22 was improved through the replacement of deionized water with NaOH solution that absorbed HCl produced during the vapor-phase silylation. Also, the therm...
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Article
Effects of Zinc and Magnesium Addition to ZSM-5 on the Catalytic Performances in 1-hexene Aromatization Reaction
Effects of Zn and Mg addition on the catalytic performances of ZSM-5 in 1-hexene aromatization and isomerization were investigated. NH3-TPD and Pyridine-IR spectra revealed that the addition of Zn could increase ...
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Article
Variation in baseline corticosterone levels of Tree Sparrow (Passer montanus) populations along an urban gradient in Bei**g, China
Rapid urbanization is a major anthropogenic pressure on bird species that rely on vegetation for food and shelter. Since the baseline corticosterone concentration (BCC) in some bird species has been found to i...
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Article
Promoted aromatization and isomerization performance over ZSM-5 zeolite modified by the combined alkali-steam treatment
The combined alkali-steam treatment was employed to prepare the ZSM-5 zeolite possessing the micro-mesopore hierarchical structure and proper acidity simultaneously. The tailored zeolite displayed superior cat...
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Article
1-Butene Cracking to Propene on High Silica HMCM-22: Relations Between Product Distribution and Feed Conversion Under Various Temperatures
HMCM-22 zeolite with a high Si/Al2 ratio (158) was applied to the 1-butene cracking reaction in a fixed-bed reactor. On basis of the product distribution, the main reaction pathways of C4 alkenes catalytic transf...
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Article
Two New On-Purpose Processes Enhancing Propene Production: Catalytic Cracking of C4 Alkenes to Propene and Metathesis of Ethene and 2-Butene to Propene
A brief review of the work carried out at Dalian Institute of Chemical Physics, Chinese Academy of Sciences for development of two new on-purpose processes enhancing propene production is presented. This inclu...
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Article
Study on the carburizing character of iron catalysts by Temperature Programmed Surface reaction of carburization
The promotion effect of potassium has been studied with the method of Temperature Programmed Surface Carburization (TPSC) technique and H2-TPR. The process of carburization on the catalyst surface was enhanced by...
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Article
Synthesis and Catalytic Reactivity of MCM-22/ZSM-35 Composites for Olefin Aromatization
A series of MCM-22/ZSM-35 composites has been hydrothermally synthesized and characterized by XRD, SEM, particle size distribution analysis, N2 adsorption and NH3-TPD techniques. Pulse and continuous flow reactio...
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Article
Butene Catalytic Cracking to Propene and Ethene over Potassium Modified ZSM-5 Catalysts
Catalytic cracking of butene over potassium modified ZSM-5 catalysts was carried out in a fixed-bed microreactor. By increasing the K loading on the ZSM-5, butene conversion and ethene selectivity decreased al...