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Oxygen vacancies enriched Ir/WOx catalysts for the directly chem-catalytic conversion of cellulose to ethanol

Tungsten 2025年第1期 88-99页

作者： Yu-Jing Weng Zhao-Ying Ding Ying-Chao Li yuan-feng wu yuan-Yang Xu Rui Chen Xiao-Lei Zhao Hai-Yong Wang Da-Lei Zhang Yu-Long Zhang Henan Key Laboratory of Coal Green Conversion and International Joint Laboratory of Coal Clean Utilization College of Chemistry and Chemical Engineering Henan Polytechnic University Key Laboratory of Renewable Energy Guangzhou Institute of Energy Conversion Chinese Academy of Sciences Liaoning Institute of Energy Technology

Tungsten and its oxides are highly versatile catalysts with unique properties that hold great promise for a wide array of applications,including biological pathways and chemical *** chemo-catalysis of cellulose to ethanol presents a promising avenue for ethanol synthesis with the potential for enhanced efficiency compared to conventional methods,offering a sustainable and carbon-neutral alternative to existing petrochemical and biological ***,Ir/WOxcatalysts enriched with oxygen vacancies were meticulously prepared and demonstrated remarkable catalytic performance in converting cellulose to ethanol directly in the presence of tungstic *** catalyst achieved a high ethanol yield of 66.5%under optimal reaction conditions,approaching the theoretical yield limit of traditional ethanol *** results revealed the presence of oxygen defects,Bronsted/Lewis acidity,and Ir nanoclusters on the catalyst surface,working synergistically to facilitate the cascade catalysis of cellulose hydrolysis,sugar retro-aldol condensation reaction,and C2 intermediate hydrodeoxygenation to *** situ Fourier transform infrared spectrometer analysis confirmed the catalyst's ability to enhance the adsorption and activation of ethylene glycol for ethanol *** manipulating subtle structural features,this study offers a fresh perspective on tungsten group catalyst design and underscores the importance of synergistic effects among catalytic sites for the efficient production of ethanol from cellulose.

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On the effect of injection of gas in the numerical simulation of accretion flows

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Science China(Physics,Mechanics & Astronomy) 2010年第S1期53卷 139-142页

作者： BU DeFu,yuan feng,wu MaoChun & YANG XiaoHong Key Laboratory for Research in Galaxies and Cosmology,Shanghai Astronomical Observatory,Chinese Academy of Sciences,Shanghai 200030,China 1. Key Laboratory for Research in Galaxies and Cosmology Shanghai Astronomical Observatory Chinese Academy of Sciences Shanghai 200030 China

We investigate the effects of various ways of injection of gas at the outer boundary in the numerical simulations of non-viscous accretion *** study three *** Model A,we inject material around the equatorial *** Models B and C,fullrange θ injection is used(we employ spherical coordinates).In all three models,the injected material has the same density distribution with polar angle θ.From the equatorial region to the polar regions,angular momentum of the injected material of Model B decreases faster than that in Model *** all of the models,after a transient episode of infall at the beginning of the simulations,the gas piles up in the equatorial regions outside the black hole and forms a thick torus bounded by a centrifugal *** find that the accretion rates of Models B and C are more than ten times higher than that in Model *** Model A,there is weak accretion only in the torus and outflows are found on the surface of the *** Model B,we find strong inflows on the surface of its torus,and the accretion in the torus is *** Model C,strong inflows also occur on the surface of its torus,but the accretion regions are narrower and there are strong outflows in its *** all of our models,the time-averaged density,pressure and angular momentum in the equatorial region can be described by a radial power law,with P ∝r-3/2,P ∝r-2 and l∝r0.

关键词： accretion accretion discs-black hole physics-hydrodynamics numerical

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Cloning and characterization of an oxiranedicarboxylate hydrolase from Labrys sp. WH-1

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2019年第12期20卷 995-1002页

作者： Wen-na BAO Zi-sheng LUO Shi-wang LIU yuan-feng wu Pei-lian WEI Gong-nian XIAO Yong LIU College of Biosystems Engineering and Food Science Zhejiang UniversityHangzhou 310058China School of Biological and Chemical Engineering Zhejiang University of Science and TechnologyHangzhou 310023China Zhejiang Provincial Key Laboratory for Chemical and Biological Processing Technology of Farm Products Hangzhou 310023China

Objective:This study aimed to clone and characterize the oxiranedicarboxylate hydrolase(ORCH) from Labrys ***:Purification by column chromatography,characterization of enzymatic properties,gene cloning by protein terminal sequencing and polymerase chain reaction(PCR),and sequence analysis by secondary structure prediction and multiple sequence alignment were ***:The ORCH from Labrys ***-1 was purified 26-fold with a yield of 12.7%.It is a monomer with an isoelectric point(pl) of 8.57 and molecular mass of 30.2 *** was stable up to 55℃with temperature at which the activity of the enzyme decreased by 50% in 15 min(T5015) of 61℃and the half-life at 50℃(t1/2,50℃) of 51 min and was also stable from pH 4 to 10,with maximum activity at 55℃and pH *** is a metal-independent enzyme and strongly inhibited by Cu2+,Ag+,and anionic *** kinetic parameters(Km,kcat,and kcat/Km) were 18.7 mmol/L,222.3 s-1,and 11.9 mmol/(L s),*** ORCH gene,which contained an open reading frame(ORF) of 825 bp encoding 274 amino acid residues,was overexpressed in Escherichia coli and the enzyme activity was 33 times higher than that of the wild *** The catalytic efficiency and thermal stability of the ORCH from Labrys ***-1 were the best among the reported ORCHs,and it provides an alternative catalyst for preparation of L(+)-2,3-dihydrobutanedioic acid.

关键词： Oxiranedicarboxylate hydrolase(ORCH) L(+)-2,3-Dihydrobutanedioic acid Characterization Cloning

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Observation of acoustic hybrid topological phases induced by the p-d orbital interactions

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 132-139页

作者： Xiao Xiang feng Gao Yu-Gui Peng Peng wu Zong-Lin Li Xue-feng Zhu School of Physics and Innovation Institute Huazhong University of Science and Technology

In spinless systems,growing attention has recently been attracted to synthetic gauge fields,which redefine the fundamental crystal symmetries by utilizing the projective algebraic ***,synthetic gauge fields have been commonly investigated in single orbital systems,and explorations on hybrid orbitals remain elusive in ***,we report the experimental observation of hybrid topological phases induced by hybrid synthetic gauge flux,which is formed by the interaction between p and d orbitals embedded in acoustic *** breaking the translation symmetries of Lxand/or Ly,we unambiguously demonstrate the first-order M?bius edge states and higher-order corner *** work establishes a platform for seeking exotic topological phases induced by hybrid-orbitals interactions and initializing the framework of hybrid-orbitalsrelated topological *** applications can be anticipated in scenarios such as high-quality sensing and robust wave trapping due to the stepwise energy distribution of the hybrid topological phase.

关键词： topological insulator synthetic gauge field projective symmetry corner states

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趋化因子受体CXCR5慢病毒载体构建及人Burkitt's淋巴瘤Raji细胞的感染

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中国卫生检验杂志 2014年第24期24卷 3575-3577,3580页

作者：袁武锋李涯松浙江省人民医院风湿免疫科浙江杭州310014

目的构建可在人Burkitt's淋巴瘤Raji细胞中高效表达人CXCR5基因的慢病毒载体,用于CXCR5在自身免疫性疾病发病机制中的研究。方法取健康人外周血分离单个核细胞并提取总RNA逆转录为c DNA,扩增CXCR5的CDS序列,进行克隆,最终构建CXCR5基因... 详细信息

目的构建可在人Burkitt's淋巴瘤Raji细胞中高效表达人CXCR5基因的慢病毒载体,用于CXCR5在自身免疫性疾病发病机制中的研究。方法取健康人外周血分离单个核细胞并提取总RNA逆转录为c DNA,扩增CXCR5的CDS序列,进行克隆,最终构建CXCR5基因的慢病毒穿梭质粒p LVX-IRES-Zs Green1-CXCR5。磷酸钙共转染法包装慢病毒,感染人Burkitt's淋巴瘤Raji细胞。空白质粒感染Raji细胞作为对照。免疫印迹分析空白质粒和过表达质粒Raji细胞中CXCR5基因表达。结果测序显示CXCR5正确无误的插入到慢病毒穿梭载体p LVX-IRES-Zs Green1多克隆位点中,且包装的慢病毒滴度达3×108TU/ml,免疫印迹证实CXCR5基因在人Burkitt's淋巴瘤Raji细胞中正确表达。结论成功构建可在人Burkitt's淋巴瘤Raji细胞中高效表达CXCR5基因的慢病毒穿梭载体,为研究CXCR5在自身免疫性疾病中的机制奠定了基础。

关键词：趋化因子受体CXCR5 慢病毒包装 Raji细胞自身免疫性疾病

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浅谈工程项目管理

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山西建筑 2008年第23期34卷 205-206页

作者：冯元午新疆乌苏市宏建建筑安装工程有限责任公司

分析了项目部组建的要求及项目管理中安全、进度、质量和成本控制管理要素,阐述了项目管理中安全、质量、进度、成本的管理和控制要点,并提出了相应的管理对策,为确保工程质量和安全施工创造良好的条件。

关键词：项目管理安全质量进度成本

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Recent progress on photoactive nonprecious transition-metal complexes

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Science China Chemistry 2025年第1期 46-95页

作者： Zhong-Liang Gong Hong-Jie Zhang Yan Cheng Jianxun Liu Yuhan Ai Yaqin Li Zhihui feng Qiong Zhang Shaolong Gong Yong Chen Chang-Jiang Yao yuan-yuan Zhu Liang-Jin Xu Yu-wu Zhong CAS Key Laboratory of Photochemistry Institute of Chemistry Chinese Academy of Sciences State Key Laboratory of Structural Cemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences School of Chemistry and Chemical Engineering Anhui Key Laboratory of Advanced Catalytic Materials and Reaction EngineeringHefei University of Technology State Key Laboratory of Explosion Science and Safety Protection School of Mechatronical Engineering Beijing Institute of Technology College of Chemistry and Molecular Sciences Hubei Key Lab on Organic and Polymeric Optoelectronic Materials Wuhan University School of Chemistry and Chemical Engineering Anhui University Key Laboratory of Photochemical Conversion and Optoelectronic Materials & CAS-HKU Joint Laboratory on New Materials Technical Institute of Physics and Chemistry Chinese Academy of Sciences

Photoactive complexes of nonprecious transition metals, mainly including those in the first-row and partially the second-row of the Periodic table of elements, have received increasing attention in view of their low cost and long-term sustainability. They are recognized as promising alternatives to noble transition metal complex congeners that have been extensively studied in optoelectronic devices, artificial photosynthesis, photocatalysis, biodiagnostics, and therapeutics, etc. This review is devoted to a comprehensive summary on the classical and recent advances on photoactive nonprecious transition metal complexes, including photoactive Zr, V, Cr, Mo, and W complexes, Mn complexes and hybrids, Fe, Co, Ni, and Cu complexes, and Zn and Cd complexes and hybrids. A particular focus is given on the molecular design, modulation of photophysical and photochemical properties, and applications of the representative and lately-developed nonprecious metal complexes. In addition, a perspective on the future development in this field is provided at the end of this review.

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Sky location of massive black hole binaries in the foreground of Galactic white dwarf binaries

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 97-108页

作者： Pan Guo Hong-Bo Jin Cong-feng Qiao Yue-Liang wu The International Centre for Theoretical Physics Asia-Pacific University of Chinese Academy of Sciences The School of Physical Sciences University of Chinese Academy of Sciences Institute for Frontiers in Astronomy and Astrophysics Beijing Normal University National Astronomical Observatories Chinese Academy of Sciences Institute of Theoretical Physics Chinese Academy of Sciences

For space-based gravitational wave （GW） detection,the main noise source for massive black hole binaries （MBHBs） is attributed to approximately 10～7double white dwarf binaries in the *** a GW source,the amplitude of the detector response,recorded by a space-based gravitational wave detector,exhibits a modulation effect with a year period when observing the source from various orbital *** the adverse conditions mentioned above,where there is a strong foreground noise and annual modulation in the signals,we employed the wavelet transform and the strong-amplitude relevant orbital position search methods,which allows the weak MBHB sources to achieve higher locating *** detail,for two MBHB sources of lower intensity,the precision of luminosity distance,represented by the ratio ?DL/DLat the 95%confidence level,is enhanced by factors of ～*** angular resolutions,denoted by??s,are enhanced by a factor of ～*** improvements increase the number of detectable GW sources,facilitate multi-messenger follow-up observations and provide constraints on the cosmological constant.

关键词： space-based gravitational wave detection gravitational waves massive black hole binaries

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Bioinspired Passive Tactile Sensors Enabled by Reversible Polarization of Conjugated Polymers

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Nano-Micro Letters 2025年第1期17卷 361-377页

作者： feng He Sitong Chen Ruili Zhou Hanyu Diao Yangyang Han Xiaodong wu School of Mechanical Engineering Sichuan UniversityChengdu 610065People’s Republic of China School of Software Engineering Chongqing University of Posts and TelecommunicationsChongqing 400065People’s Republic of China State Key Laboratory of Polymer Materials Engineering Sichuan UniversityChengdu 610065People’s Republic of China

Tactile perception plays a vital role for the human body and is also highly desired for smart prosthesis and advanced *** to active sensing devices,passive piezoelectric and triboelectric tactile sensors consume less power,but lack the capability to resolve static ***,we address this issue by utilizing the unique polarization chemistry of conjugated polymers for the first time and propose a new type of bioinspired,passive,and bio-friendly tactile sensors for resolving both static and dynamic ***,to emulate the polarization process of natural sensory cells,conjugated polymers(including poly(3,4-ethylenedioxythiophen e):poly(styrenesulfonate),polyaniline,or polypyrrole)are controllably polarized into two opposite states to create artificial potential *** controllable and reversible polarization process of the conjugated polymers is fully in situ ***,a micro-structured ionic electrolyte is employed to imitate the natural ion channels and to encode external touch stimulations into the variation in potential difference *** with the currently existing tactile sensing devices,the developed tactile sensors feature distinct characteristics including fully organic composition,high sensitivity(up to 773 mV N^(−1)),ultralow power consumption(nW),as well as superior *** demonstrations,both single point tactile perception(surface texture perception and material property perception)and two-dimensional tactile recognitions(shape or profile perception)with high accuracy are successfully realized using self-defined machine learning *** tactile sensing concept innovation based on the polarization chemistry of conjugated polymers opens up a new path to create robotic tactile sensors and prosthetic electronic skins.

关键词： Passive tactile sensors Reversible polarization of conjugated polymers Tactile perception Machine learning algorithm Object recognition

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现浇楼梯对框架结构的抗震影响分析与设计建议

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土木工程学报 2010年第10期43卷 53-62页

作者：冯远吴小宾李从春熊耀清中国建筑西南设计研究院有限公司四川成都610081

通过对计入和不计入楼梯的18个框架结构模型的分析对比,研究地震作用下楼梯对于框架结构整体性能和受力性能的影响。对于在整体结构中起着斜撑作用的楼梯的受力情况进行分析,并进行有限元分析。对于计入楼梯的框架结构模型采用弹塑性时... 详细信息

通过对计入和不计入楼梯的18个框架结构模型的分析对比,研究地震作用下楼梯对于框架结构整体性能和受力性能的影响。对于在整体结构中起着斜撑作用的楼梯的受力情况进行分析,并进行有限元分析。对于计入楼梯的框架结构模型采用弹塑性时程分析,了解结构屈服机制。通过计算分析比较,提出一种将楼梯与整体结构脱离的设计建议。

关键词：现浇楼梯框架结构抗震性能设计建议

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