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Dilution rate and microstructure of TIG arc Ni-Al powder surfacing layer

SHAN Jiguo, DONG Wei, TAN Wenda, ZHANG Di, REN Jialie

Frontiers of Mechanical Engineering 2007, Volume 2, Issue 1,   Pages 20-24 doi: 10.1007/s11465-007-0003-0

Abstract: Surfacing beads are prepared by a direct current tungsten inert gas arc nickel-aluminum (Ni-Al) powder-(Fe, Ni) is formed in the grain boundaries of Ni-Al intermetallic matrix instead of the intergranular

Keywords： decrease     Ni-Al     surfacing parameter     temperature     surfacing process    

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Effects of MgO promoter on properties of Ni/Al2O3 catalysts for partial oxidation of methane to syngas

QIU Yejun, CHEN Jixiang, ZHANG Jiyan

Frontiers of Chemical Science and Engineering 2007, Volume 1, Issue 2,   Pages 167-171 doi: 10.1007/s11705-007-0031-7

Abstract: The effects of MgO promoter on the physico-chemical properties and catalytic performance of Ni/AlO catalystsThe suitable content of MgO promoter in Ni/AlO catalyst was ?7 wt-%.

Keywords： excessive     selectivity     decrease     dispersiveness     physico-chemical    

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Catalytic hydrolysis of gaseous HCN over Cu–Ni/γ-Al

Linxia Yan, Senlin Tian, Jian Zhou, Xin Yuan

Frontiers of Environmental Science & Engineering 2016, Volume 10, Issue 6, doi: 10.1007/s11783-016-0872-8

Abstract: The Cu–Ni/γ-Al O catalyst was prepared to study HCN hydrolysis ?NH production GRAPHIC ABSTRACT To decompose efficiently hydrogen cyanide (HCN) in exhaust gas, g-AlO -supported bimetallic-based Cu–Ni catalyst was prepared by incipient-wetness impregnation method.volume ratio, reaction temperature, and the presence of CO or O on the HCN removal efficiency on the Cu–Ni/g-Al O catalyst were investigated.

Keywords： Hydrogen cyanide     Cu–Ni/g-Al2O3     Catalytic hydrolysis    

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Fe - Ni - Co - Al2O3 Cermets Inert Anode for Aluminum Electrolysis

Qiu Zhuxian,Shi Zhongning,Xu Junli

Strategic Study of CAE 2004, Volume 6, Issue 8,   Pages 35-39

Abstract: The cell was built with a graphite cathode of 120 mm×40 mm×20 mm and a Fe - Ni - Co -AlNi and Co.confirmed that the electrochemical reaction occurred in the electrolysis cell was the decomposition of Al

Keywords： aluminum electrolysis     inert anode     back EMF value    

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CO2 methanation and co-methanation of CO and CO2 over Mn-promoted Ni/Al2

Kechao Zhao,Zhenhua Li,Li Bian

Frontiers of Chemical Science and Engineering 2016, Volume 10, Issue 2,   Pages 273-280 doi: 10.1007/s11705-016-1563-5

Abstract: A series of Mn-promoted 15 wt-% Ni/Al O catalysts were prepared by an incipient wetness impregnationThe effect of the Mn content on the activity of the Ni/Al O catalysts for CO methanation and the co-methanationThe Mn-promoted 15 wt-% Ni/Al O catalysts had improved CO methanation activity especially at low temperatures/Al O catalyst.The co-methanation tests on the 1.71Mn-Ni/Al O catalyst indicated that adding Mn markedly enhanced the

Keywords： Mn promotion     nickel catalysts     CO2 methanation     co-methanation of CO and CO2    

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Combinatorial Synthesis and High-Throughput Characterization of Microstructure and Phase Transformation in Ni–Ti–Cu–V Article

Al Hasan, Huilong Hou, Suchismita Sarkar, Sigurd Thienhaus, Apurva Mehta, Alfred Ludwig, Ichiro Takeuchi

Engineering 2020, Volume 6, Issue 6,   Pages 637-643 doi: 10.1016/j.eng.2020.05.003

Abstract:

Ni–Ti–based shape memory alloys (SMAs) have found widespreadIn this study, a composition spread of Ni–Ti–Cu–V thin-film library was synthesized

Keywords： Ni–Ti–Cu–V alloys     Combinatorial materials science     Quaternary alloys     Shape memory alloys     Thin-film    

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Research of the Preparation Technology for Zr66Al9Cu16Ni9

Ruan Xuping,Ruan Hongwei

Strategic Study of CAE 2004, Volume 6, Issue 5,   Pages 76-78

Abstract: with some elements in the melt, therefore, it wasn´t favourable for coating the Zr66Al9Ni9Cu16 alloy, hence hindering the formation of the amorphous statereacted with some elements in the melt, so they were not suitable for purifying the Zr66Al9Ni9Cu16 alloy.

Keywords： bulk amorphous alloy     preparation technology     glass     fused salt     vacuum degree    

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Molecular aspects of MERS-CoV

Al-Ahmed, Jaffar A. Al-Tawfiq

Frontiers of Medicine 2017, Volume 11, Issue 3,   Pages 365-377 doi: 10.1007/s11684-017-0521-z

Abstract:

Middle East respiratory syndrome coronavirus (MERS-CoV) is a betacoronavirus which can cause acute respiratory distress in humans and is associated with a relatively high mortality rate. Since it was first identified in a patient who died in a Jeddah hospital in 2012, the World Health Organization has been notified of 1735 laboratory-confirmed cases from 27 countries, including 628 deaths. Most cases have occurred in Saudi Arabia. MERS-CoV ancestors may be found in Old World bats of the Vespertilionidae family. After a proposed bat to camel switching event, transmission of MERS-CoV to humans is likely to have been the result of multiple zoonotic transfers from dromedary camels. Human-to-human transmission appears to require close contact with infected persons, with outbreaks mainly occurring in hospital environments. Outbreaks have been associated with inadequate infection prevention and control implementation, resulting in recommendations on basic and more advanced infection prevention and control measures by the World Health Organization, and issuing of government guidelines based on these recommendations in affected countries including Saudi Arabia. Evolutionary changes in the virus, particularly in the viral spike protein which mediates virus-host cell contact may potentially increase transmission of this virus. Efforts are on-going to identify specific evidence-based therapies or vaccines. The broad-spectrum antiviral nitazoxanide has been shown to have in vitro activity against MERS-CoV. Synthetic peptides and candidate vaccines based on regions of the spike protein have shown promise in rodent and non-human primate models. GLS-5300, a prophylactic DNA-plasmid vaccine encoding S protein, is the first MERS-CoV vaccine to be tested in humans, while monoclonal antibody, m336 has given promising results in animal models and has potential for use in outbreak situations.

Keywords： MERS-CoV     Saudi Arabia     spike protein     transmission     evolution     vaccine    

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High-level expression of recombinant IgG1 by CHO K1 platform

Ningning Xu, Jianfa Ou, Al-Karim (Al) Gilani, Lufang Zhou, Margaret Liu

Frontiers of Chemical Science and Engineering 2015, Volume 9, Issue 3,   Pages 376-380 doi: 10.1007/s11705-015-1531-5

Abstract: The Chinese Hamster Ovary (CHO K1) cell was used to express a targeted anti-cancer monoclonal antibody by optimizing the platform of the construction of production cell line in this study. The adherent CHO K1 was first adapted to suspension culture in chemical defined medium. Then the glutamine synthetase (GS) vector was applied to construct a single plasmid to overexpress a monoclonal antibody IgG1. Post transfection, the production of cell pool was optimized by glutamine-free selection and amplification using various concentrations of methionine sulfoximine. The best cell pool of CHO K1/IgG1 was used to screen the top single clone using the limiting dilution cloning. Finally, a high IgG1 production of 780 mg/L was obtained from a batch culture. This study demonstrated that the construction of high producing cell line, from gene to clone, could be completed within six month and the gene amplification improved protein production greatly.

Keywords： Chinese hamster ovary (CHO)     monoclonal antibody     IgG1     amplification     cell line development    

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Enhanced activation of persulfate using mesoporous silica spheres augmented Cu–Al bimetallic oxide particles

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 10,   Pages 1581-1592 doi: 10.1007/s11705-023-2327-7

Abstract: Herein, Cu–Al bimetallic oxide was synthesized and mixed with mesoporous silica spheres via a simpleresults of X-ray diffraction, scanning electron microscopy, and energy dispersion spectroscopy, Cu–Albimetallic oxide was determined as CuO-Al2O3, and mesoporous silica spheres wereThe introduction of Al2O3 promoted the formation of surface oxygen vacancies, which

Keywords： Cu–Al bimetallic oxides     mesoporous silica spheres     peroxydisulfate     bisphenol A    

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Resistance to acid degradation, sorptivity, and setting time of geopolymer mortars

Osama A MOHAMED; Rania AL-KHATTAB; Waddah AL-HAWAT

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 6,   Pages 781-791 doi: 10.1007/s11709-022-0862-9

Abstract: Experimental evaluations were conducted to determine the water sorptivity, setting time, and resistance to a highly acidic environment, of mortar with alkali-activated ground granulated blast furnace slag (GBS) binder and also of combinations of fly ash and GBS binders. Binders were activated using mixtures of NaOH and Na2SiO3 solutions. The molarity of NaOH in the mixtures ranged from 10 mol·L−1 to 16 mol·L−1, and the Na2SiO3/NaOH ratio was varied from 1.5 to 2.5. Mortar samples were produced using three binder combinations: 1) GBS as the only binder; 2) blended binder with a slag-to-fly ash ratio of 3:1; and 3) mixed binder with 1:1 ratio of slag to fly ash. Mortar samples were mixed and cured at (22 ± 2) °C till the day of the test. The impact of activator solution alkalinity, activator ratio Na2SiO3/NaOH, GBS content on the rate of water absorption were evaluated. After 7, 28, and 90 d of immersion in a 10% sulfuric acid solution, the resistance of a geopolymer matrix to degradation was assessed by measuring the change in sample weight. The influence of solution alkalinity and relative fly ash content on setting times was investigated. Alkali-activated mortar with a slag-to-fly ash ratio of 3:1 had the least sorptivity compared to the two other binder combinations, at each curing age, and for mortars made with each of the NaOH alkaline activator concentrations. Mortar sorptivity decreased with age and sodium hydroxide concentrations, suggesting the production of geopolymerization products. No reduction in weight of sample occurred after immersion in the strong acid H2SO4 solution for three months, regardless of binder combination. This was due to the synthesis of hydration and geopolymerization products in the presence of curing water, which outweighed the degradation of the geopolymer matrix caused by sulfuric acid.

Keywords： alkali-activated materials     fly ash     sorptivity     durability of concrete     sodium hydroxide     sodium silicates     reduction in CO2 emissions     sulfuric acid    

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The cooperation effect of Ni and Pt in the hydrogenation of acetic acid

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 3,   Pages 397-407 doi: 10.1007/s11705-021-2076-4

Abstract: Herein, a series of Ni-doped PtSn catalysts were prepared, characterized and studied in the hydrogenationThe Ni dopant has a strong interaction with Pt, which promotes the hydrogen adsorption, providing anMeanwhile, the presence of Ni also improves the Pt dispersion, giving more accessible active sites forThe cooperation of Pt and Ni significantly promotes the catalytic activity of the hydrogenation of aceticAs a result, the catalyst with 0.1% Ni exhibits the best reaction activity, and its space time yield

Keywords： acetic acid     ethanol     hydrogenation     Pt     Ni     cooperation effect    

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Effects of additive NaI on electrodeposition of Al coatings in AlCl

Tianyu Yao, Haiyan Yang, Kui Wang, Haiyan Jiang, Xiao-Bo Chen, Hezhou Liu, Qudong Wang, Wenjiang Ding

Frontiers of Chemical Science and Engineering 2021, Volume 15, Issue 1,   Pages 138-147 doi: 10.1007/s11705-020-1935-8

Abstract: Effects of NaI as an additive on electrodeposition of Al coatings in AlCl -NaCl-KCl (80-10-10 wt-%) moltenreveal that addition of NaI in the electrolyte intensifies cathodic polarization, inhibits growth of AlThe electrodeposition of Al coatings in the AlCl -NaCl-KCl molten salts electrolyte proceeds via three-dimensionalGalvanostatic deposition results indicate that NaI could facilitate the formation of uniform Al depositsA compact coating consisting of Al deposits with an average particle size of 3 μm was obtained at a current

Keywords： NaI     additive     electrodeposition     molten salts     Al coating    

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Seismic retrofitting of severely damaged RC connections made with recycled concrete using CFRP sheets

Yasmin MURAD, Wassel AL BODOUR, Ahmed ASHTEYAT

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 2,   Pages 554-568 doi: 10.1007/s11709-020-0613-8

Abstract: An experimental and numerical program is carried out in this research to investigate the influence of CFRP sheets on the cyclic behavior of unconfined connections made with recycled concrete. Cement is partially replaced by silica fume, iron filling and pulverised fuel ash using two different percentages: 15% and 20%. Each specimen is partially loaded at the first stage and then specimens are repaired using CFRP sheets. The repaired specimens are then laterally loaded until failure. In addition, a finite element model is built in ABAQUS and verified using the experimental results. The experimental results have shown that the repaired specimens have regained almost double the capacity of the un-repaired specimens and hence the adopted repair configuration is recommended for retrofitting seismically vulnerable RC connections. Increasing cement replacement percentage by silica fume, fuel ash or iron filling from 15% to 20% has reduced joint carrying capacity and weakened the joint. It is recommended using 15% pulverised fuel ash or silica fume as cement partial replacement to enhance the strength and ultimate drift of beam-column joints under cyclic loading. Iron filling concrete is also recommended but the enhancement is relatively less than that found with pulverised fuel ash concrete and silica fume concrete.

Keywords： retrofitting     CFRP sheets     recycled concrete     pulverised fuel ash     silica fume     cyclic     beam-column connections    

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Thermodynamic Analysis and Reaction Model of Combustion Synthesis in Al-Cr2O3 Systemwith Al2O3 and Cr2O3 Diluents

Zhang Yancheng,Pan Ye,Zhang Chuan

Strategic Study of CAE 2004, Volume 6, Issue 6,   Pages 63-67

Abstract:

The thermodynamic calculation and analysis of combustion synthesis reaction of Al - Cr<sub>2&

Keywords： cermet     combustion synthesis     Al - Cr2O3 system     thermodynamics     reaction model    

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Title Author Date Type Operation

Dilution rate and microstructure of TIG arc Ni-Al powder surfacing layer

SHAN Jiguo, DONG Wei, TAN Wenda, ZHANG Di, REN Jialie

Journal Article

Effects of MgO promoter on properties of Ni/Al2O3 catalysts for partial oxidation of methane to syngas

QIU Yejun, CHEN Jixiang, ZHANG Jiyan

Journal Article

Catalytic hydrolysis of gaseous HCN over Cu–Ni/γ-Al

Linxia Yan, Senlin Tian, Jian Zhou, Xin Yuan

Journal Article

Fe - Ni - Co - Al2O3 Cermets Inert Anode for Aluminum Electrolysis

Qiu Zhuxian,Shi Zhongning,Xu Junli

Journal Article

CO2 methanation and co-methanation of CO and CO2 over Mn-promoted Ni/Al2

Kechao Zhao,Zhenhua Li,Li Bian

Journal Article

Combinatorial Synthesis and High-Throughput Characterization of Microstructure and Phase Transformation in Ni–Ti–Cu–V

Al Hasan, Huilong Hou, Suchismita Sarkar, Sigurd Thienhaus, Apurva Mehta, Alfred Ludwig, Ichiro Takeuchi

Journal Article

Research of the Preparation Technology for Zr66Al9Cu16Ni9

Ruan Xuping,Ruan Hongwei

Journal Article

Molecular aspects of MERS-CoV

Al-Ahmed, Jaffar A. Al-Tawfiq

Journal Article

High-level expression of recombinant IgG1 by CHO K1 platform

Ningning Xu, Jianfa Ou, Al-Karim (Al) Gilani, Lufang Zhou, Margaret Liu

Journal Article

Enhanced activation of persulfate using mesoporous silica spheres augmented Cu–Al bimetallic oxide particles

Journal Article

Resistance to acid degradation, sorptivity, and setting time of geopolymer mortars

Osama A MOHAMED; Rania AL-KHATTAB; Waddah AL-HAWAT

Journal Article

The cooperation effect of Ni and Pt in the hydrogenation of acetic acid

Journal Article

Effects of additive NaI on electrodeposition of Al coatings in AlCl

Tianyu Yao, Haiyan Yang, Kui Wang, Haiyan Jiang, Xiao-Bo Chen, Hezhou Liu, Qudong Wang, Wenjiang Ding

Journal Article

Seismic retrofitting of severely damaged RC connections made with recycled concrete using CFRP sheets

Yasmin MURAD, Wassel AL BODOUR, Ahmed ASHTEYAT

Journal Article

Thermodynamic Analysis and Reaction Model of Combustion Synthesis in Al-Cr2O3 Systemwith Al2O3 and Cr2O3 Diluents

Zhang Yancheng,Pan Ye,Zhang Chuan

Journal Article