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Thermoresponsive block copolymer supported Pt nanocatalysts for base-free aerobic oxidation of 5-hydroxymethyl

Frontiers of Chemical Science and Engineering 2021, Volume 15, Issue 6,   Pages 1514-1523 doi: 10.1007/s11705-021-2092-4

Abstract: A base-free catalytic system for the aerobic oxidation of 5-hydroxymethyl-2-furfural was exploited byThe Pt nanocatalysts were well-dispersed and highly active for the base-free oxidation of 5-hydroxymethyl

Keywords： aerobic oxidation     base-free     5-hydroxymethyl-2-furfural     Pt nanoparticle     thermoresponsive block copolymer    

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Efficient base-free oxidation of 5-hydroxymethylfurfural to 2,5-furandicarboxylic acid over copper-doped

Feng Cheng, Dongwen Guo, Jinhua Lai, Meihui Long, Wenguang Zhao, Xianxiang Liu, Dulin Yin

Frontiers of Chemical Science and Engineering 2021, Volume 15, Issue 4,   Pages 960-968 doi: 10.1007/s11705-020-1999-5

Abstract: 2,5-Furandicarboxylic acid (FDCA) is an important and renewable building block and can serve as an alternative to terephthalic acid in the production of bio-based degradable plastic. In this study, Cu-doped MnO  nanorods were prepared by a facile hydrothermal redox method and employed as catalysts for the selective oxidation of 5-hydroxymethylfurfural (HMF) to FDCA using -butyl hydroperoxide (TBHP) as an oxidant. The catalysts were characterized using X-ray diffraction analysis, Fourier transform infrared spectroscopy, thermogravimetric analysis, and transmission electron microscopy. The effects of oxidants, solvents, and reaction conditions on the oxidation of HMF were investigated, and a reaction mechanism was proposed. Experimental results demonstrated that 99.4% conversion of HMF and 96.3% selectivity of FDCA were obtained under suitable conditions, and -butanol was the most suitable solvent when TBHP was used as an oxidant. More importantly, the Cu-doped MnO catalyst can maintain durable catalytic activity after being recycled for more than ten times.

Keywords： 5-hydroxymethylfurfural     25-furandicarboxylic acid     selective oxidation     Cu-doped MnO2     biomass transformation    

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Trajectory planning and base attitude restoration of dual-arm free-floating space robot by enhanced bidirectional

Zongwu XIE1 , Xiaoyu ZHAO1 , Zainan JIANG1 , Haitao YANG2 , Chongyang LI1

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 1, doi: 10.1007/s11465-021-0658-y

Abstract: When free-floating space robots perform space tasks, the satellite base attitude is disturbed by theThe disturbance of the base orientation may affect the communication between the space robot and theenhanced bidirectional approach is proposed to plan the manipulator trajectory and eliminate the final baseintermediate variable-based Lyapunov function is derived and solved for smooth joint trajectory and restorable baseSimulations are carried out in the end, and the proposed method is validated in minimizing final base

Keywords： free-floating space robot     dual arm     coordinated operation     base attitude restoration     bidirectional    

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Study of base friction simulation tests based on a complicated engineered bridge slope

Liu HE, Guang WU, Hua WANG

Frontiers of Structural and Civil Engineering 2012, Volume 6, Issue 4,   Pages 393-397 doi: 10.1007/s11709-012-0174-6

Abstract: In this paper, a physical base friction test model of a slope is established.the slope in both its natural state and during excavation loading is qualitatively analyzed through baseThe base friction test results are then subjected to comparison and analysis using finite element numerical

Keywords： base friction test     slope stability evaluation     bridge slope    

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Cell-free systems in the new age of synthetic biology

Fernando Villarreal,Cheemeng Tan

Frontiers of Chemical Science and Engineering 2017, Volume 11, Issue 1,   Pages 58-65 doi: 10.1007/s11705-017-1610-x

Abstract: The advent of synthetic biology has ushered in new applications of cell-free transcription-translationThese cell-free systems are reconstituted using cellular proteins, and are amenable to modular controlHere, we discuss the historical advancement of cell-free systems, as well as their new applications inFinally, we present our vision on the future direction of cell-free synthetic biology.

Keywords： cell-free system     application    

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Base editors: development and applications in biomedicine

Frontiers of Medicine 2023, Volume 17, Issue 3,   Pages 359-387 doi: 10.1007/s11684-023-1013-y

Abstract: Base editor (BE) is a gene-editing tool developed by combining the CRISPR/Cas system with an individualdeaminase, enabling precise single-base substitution in DNA or RNA without generating a DNA double-strandBase editors offer more precise and secure genome-editing effects than other conventional artificialSince the development of the two main base editors, cytosine base editors (CBEs) and adenine base editorsHere, we review the recent development of base editors, summarize their applications in the biomedical

Keywords： base editing     CBE     ABE     ADAR     DdCBE     disease model     therapeutic application    

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Multistage-batch bipolar membrane electrodialysis for base production from high-salinity wastewater

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 5,   Pages 764-773 doi: 10.1007/s11705-021-2114-2

Abstract: However, the low concentration of base generated from a traditional BMED process may limit the viabilityreport an especially designed multistage-batch (two/three-stage-batch) BMED process to increase the baseconcentration by adjusting different volume ratios in the acid (Vacid), base (Vbase), and salt compartments (Vsalt).–1, which was higher than the most reported base production by BMED.

Keywords： bipolar membrane electrodialysis     multistage-batch     base production     high-salinity wastewater    

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Enzyme@bismuth-ellagic acid: a versatile platform for enzyme immobilization with enhanced acid-base stability

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 6,   Pages 784-794 doi: 10.1007/s11705-022-2278-4

Abstract: biocatalysts; however, it is limited by the conditions of metal–organic framework synthesis and its acid-baseHerein, a biocatalytic platform with improved acid-base stability was constructed via a one-pot methodAfter encapsulation, the stability, especially the acid-base stability, of amyloglucosidases@bismuth-ellagic

Keywords： bismuth-ellagic acid     in situ encapsulation     enzyme@MOF biocomposites    

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Application of Cu nanoparticles as N32 base oil additives

Qiang HE, Jun YE, Hongzhao LIU, Jinling LI,

Frontiers of Mechanical Engineering 2010, Volume 5, Issue 1,   Pages 93-97 doi: 10.1007/s11465-009-0083-0

Abstract: Cu nanoparticles as N32 base oil additives are studied in the paper and their structure is characterizedThe results show that N32 base oil with 0.5% Cu nanoparticle can improve the test sample contact fatiguelife than pure N32 base oil.

Keywords： Cu nanoparticle     tribological property     contact fatigue     weibull distribution    

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Recent advances in cycloaddition of CO with epoxides: halogen-free catalysis and mechanistic insights

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 12,   Pages 1879-1894 doi: 10.1007/s11705-023-2354-4

Abstract: To address these concerns, the halogen-free cycloaddition of CO2 with epoxides has alwaysIn this review, we systematically discussed the halogen-free catalysis for cycloaddition of CO2baseSpecially, metal oxides as the potential halogen-free catalysts are highlighted due to their flexibleacid-base sites for synergistic activation of CO2 and epoxides, facile preparation, and low

Keywords： carbon dioxide     halogen-free catalysis     cyclic carbonate     mechanistic insight    

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Hollow carbon spheres and their noble metal-free hybrids in catalysis

Frontiers of Chemical Science and Engineering 2021, Volume 15, Issue 6,   Pages 1380-1407 doi: 10.1007/s11705-021-2097-z

Abstract: Herein, we overview hollow carbon sphere-based materials and their noble metal-free hybrids in catalysiscontrolling pore structure and surface morphology, and then heterogeneous doping as well as their metal-free

Keywords： hollow carbon spheres     functionalization     noble metal-free     catalysis    

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Decontamination of Cr(VI) facilitated formation of persistent free radicals on rice husk derived biochar

Kaikai Zhang, Peng Sun, Yanrong Zhang

Frontiers of Environmental Science & Engineering 2019, Volume 13, Issue 2, doi: 10.1007/s11783-019-1106-7

Abstract:

PFRs were produced on biochar during Cr(VI) decontamination.

PFRs formation on biochar was owing to the oxidization of phenolic-OH by Cr(VI).

Appearance of excessive oxidant led to the consumption of PFRs on biochar.

Biochar charred at high temperature possessed great performance to Cr(VI) removal.

Keywords： Biochar     Persistent free radicals     Phenolic hydroxyl groups     Cr(VI) reduction    

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Extension Knowledge Base System and Its Application

Li Lixi,Li Jia

Strategic Study of CAE 2001, Volume 3, Issue 3,   Pages 61-64

Abstract:

Knowledge base system (KBS) is an organization to store and manage a lot of knowledge.Finally, the feature and the frame of extension knowledge base system (EKBS) are proposed.It is composed of goal system, condition system, common knowledge base, categorized knowledge base, inferencemachine and knowledge base management system.

Keywords： extension theory     non-compatible     knowledge base    

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Process study on adsorption of glycerin from saline wastewater by strong base anion resin

Haitao ZHANG, Xiaoqing MA, Xian QU, Jeanpierre Arcangeli

Frontiers of Chemical Science and Engineering 2011, Volume 5, Issue 1,   Pages 113-116 doi: 10.1007/s11705-010-0547-0

Abstract: A physicochemical method was used to adsorb glycerin in saline wastewater by strong base anion resinThen, this specific complex could be adsorbed by strong base anion resin.

Keywords： glycerin     anion resin     boric acid     wastewater     NaCl    

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Heat-spreading analysis of a heat sink base embedded with a heat pipe

B. V. BORGMEYER, H. B. MA,

Frontiers in Energy 2010, Volume 4, Issue 2,   Pages 143-148 doi: 10.1007/s11708-010-0013-1

Abstract: A simplified model predicting the heat transfer performance of a heat sink base with a high thermal conductivityinvestigation indicates that for heat sink bases with a high effective thermal conductivity, such as the base

Keywords： heat pipe     heat sink     microprocessor heat removal    

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Title Author Date Type Operation

Thermoresponsive block copolymer supported Pt nanocatalysts for base-free aerobic oxidation of 5-hydroxymethyl

Journal Article

Efficient base-free oxidation of 5-hydroxymethylfurfural to 2,5-furandicarboxylic acid over copper-doped

Feng Cheng, Dongwen Guo, Jinhua Lai, Meihui Long, Wenguang Zhao, Xianxiang Liu, Dulin Yin

Journal Article

Trajectory planning and base attitude restoration of dual-arm free-floating space robot by enhanced bidirectional

Zongwu XIE1 , Xiaoyu ZHAO1 , Zainan JIANG1 , Haitao YANG2 , Chongyang LI1

Journal Article

Study of base friction simulation tests based on a complicated engineered bridge slope

Liu HE, Guang WU, Hua WANG

Journal Article

Cell-free systems in the new age of synthetic biology

Fernando Villarreal,Cheemeng Tan

Journal Article

Base editors: development and applications in biomedicine

Journal Article

Multistage-batch bipolar membrane electrodialysis for base production from high-salinity wastewater

Journal Article

Enzyme@bismuth-ellagic acid: a versatile platform for enzyme immobilization with enhanced acid-base stability

Journal Article

Application of Cu nanoparticles as N32 base oil additives

Qiang HE, Jun YE, Hongzhao LIU, Jinling LI,

Journal Article

Recent advances in cycloaddition of CO with epoxides: halogen-free catalysis and mechanistic insights

Journal Article

Hollow carbon spheres and their noble metal-free hybrids in catalysis

Journal Article

Decontamination of Cr(VI) facilitated formation of persistent free radicals on rice husk derived biochar

Kaikai Zhang, Peng Sun, Yanrong Zhang

Journal Article

Extension Knowledge Base System and Its Application

Li Lixi,Li Jia

Journal Article

Process study on adsorption of glycerin from saline wastewater by strong base anion resin

Haitao ZHANG, Xiaoqing MA, Xian QU, Jeanpierre Arcangeli

Journal Article

Heat-spreading analysis of a heat sink base embedded with a heat pipe

B. V. BORGMEYER, H. B. MA,

Journal Article