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Cu-Based Materials for Enhanced C_(2+) Product Selectivity in Photo-/Electro-Catalytic CO_(2) Reduction: Challenges and Prospects 被引量:1
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作者 Baker Rhimi Min Zhou +2 位作者 Zaoxue Yan Xiaoyan Cai Zhifeng Jiang 《Nano-Micro Letters》 SCIE EI CAS CSCD 2024年第4期25-66,共42页
Carbon dioxide conversion into valuable products using photocatalysis and electrocatalysis is an effective approach to mitigate global environmental issues and the energy shortages. Among the materials utilized for ca... Carbon dioxide conversion into valuable products using photocatalysis and electrocatalysis is an effective approach to mitigate global environmental issues and the energy shortages. Among the materials utilized for catalytic reduction of CO_(2), Cu-based materials are highly advantageous owing to their widespread availability, cost-effectiveness, and environmental sustainability. Furthermore, Cu-based materials demonstrate interesting abilities in the adsorption and activation of carbon dioxide, allowing the formation of C_(2+) compounds through C–C coupling process. Herein, the basic principles of photocatalytic CO_(2) reduction reactions(PCO_(2)RR) and electrocatalytic CO_(2) reduction reaction(ECO_(2)RR) and the pathways for the generation C_(2+) products are introduced. This review categorizes Cu-based materials into different groups including Cu metal, Cu oxides, Cu alloys, and Cu SACs, Cu heterojunctions based on their catalytic applications. The relationship between the Cu surfaces and their efficiency in both PCO_(2)RR and ECO_(2)RR is emphasized. Through a review of recent studies on PCO_(2)RR and ECO_(2)RR using Cu-based catalysts, the focus is on understanding the underlying reasons for the enhanced selectivity toward C_(2+) products. Finally, the opportunities and challenges associated with Cu-based materials in the CO_(2) catalytic reduction applications are presented, along with research directions that can guide for the design of highly active and selective Cu-based materials for CO_(2) reduction processes in the future. 展开更多
关键词 Photocatalytic CO_(2)reduction cu-based materials Electrocatalytic CO_(2)reduction
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Cu-based materials for electrocatalytic CO_(2) to alcohols:Reaction mechanism,catalyst categories,and regulation strategies
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作者 Yaru Lei Yaxin Niu +8 位作者 Xiaolong Tang Xiangtao Yu Xiubing Huang Xiaoqiu Lin Honghong Yi Shunzheng Zhao Jiaying Jiang Jiyue Zhang Fengyu Gao 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2024年第10期593-611,I0013,共20页
Electrocatalytic CO_(2) reduction reaction(CO_(2)RR)technology,which enables carbon capture storage and resource utilization by reducing CO_(2) to valuable chemicals or fuels,has become a global research hotspot in re... Electrocatalytic CO_(2) reduction reaction(CO_(2)RR)technology,which enables carbon capture storage and resource utilization by reducing CO_(2) to valuable chemicals or fuels,has become a global research hotspot in recent decades.Among the many products of CO_(2)RR(carbon monoxide,acids,aldehydes and alcohols,olefins,etc.),alcohols(methanol,ethanol,propanol,etc.)have a higher market value and energy density,but it is also more difficult to produce.Copper is known to be effective in catalyzing CO_(2) to high valueadded alcohols,but with poor selectivity.The progress of Cu-based catalysts for the selective generation of alcohols,including copper oxides,bimetals,single atoms and composites is reviewed.Meanwhile,to improve Cu-based catalyst activity and modulate product selectivity,the modulation strategies are straighten out,including morphological regulation,crystalline surface,oxidation state,as well as elemental doping and defect engineering.Based on the research progress of electrocatalytic CO_(2) reduction for alcohol production on Cu-based materials,the reaction pathways and the key intermediates of the electrocatalytic CO_(2)RR to methanol,ethanol and propanol are summarized.Finally,the problems of traditional electrocatalytic CO_(2)RR are introduced,and the future applications of machine learning and theoretical calculations are prospected.An in-depth discussion and a comprehensive review of the reaction mechanism,catalyst types and regulation strategies were carried out with a view to promoting the development of electrocatalytic CO_(2)RR to alcohols. 展开更多
关键词 Electrocatalytic CO_(2)RR cu-based catalyst ALCOHOLS Reaction mechanism Regulation strategies
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A Cu-based bulk amorphous alloy composite reinforced by carbon nanotube 被引量:4
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作者 蔡安辉 熊翔 +5 位作者 刘咏 安伟科 周果君 罗云 李铁林 李小松 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2012年第9期2191-2197,共7页
Bulk Cu50Zr40Ti10 amorphous alloy composites reinforced with carbon nanotube (CNT) were successfully fabricated by hot pressing technique. Their density, thermal conductivity, and mechanical properties were systemic... Bulk Cu50Zr40Ti10 amorphous alloy composites reinforced with carbon nanotube (CNT) were successfully fabricated by hot pressing technique. Their density, thermal conductivity, and mechanical properties were systemically investigated. The density and the compression strength of the compacts both decrease with increasing CNT content. The thermal conductivity of the compacts decreases when the CNT content is less than 0.10% or exceeds 0.60% (mass fraction), while increases when the CNT content is in the range of 0.1%-0.6%. The strain limit and the modulus of the compacts are obviously improved when the CNT content is less than 1.0% and then decrease significantly when the CNT content exceeds 1.00%. The optimum CNT addition is less than 0.20% at the comprehensive properties point of view. 展开更多
关键词 cu-based amorphous alloy carbon nanotube COMPOSITE
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Preparation and properties of novel Cu-based bulk metallic glasses Cu_(55-x)Zr_(37)Ti_8In_x 被引量:2
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作者 皮锦红 潘冶 +2 位作者 吴继礼 张露 贺显聪 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2013年第10期2989-2993,共5页
The glassy rods were successfully fabricated in the Cu-Zr-Ti-In alloy system by casting into a copper mold. The value of ATx reaches a maximum of 66 K for the BMG CusoZraTTi8In5 alloy. The reasons for enhancing glass ... The glassy rods were successfully fabricated in the Cu-Zr-Ti-In alloy system by casting into a copper mold. The value of ATx reaches a maximum of 66 K for the BMG CusoZraTTi8In5 alloy. The reasons for enhancing glass forming ability of Cu-based BMGs with the addition of indium were discussed from atomic size and thermodynamics. Alternatively, the BMG Cu52Zra7Ti8In3 exhibits the highest compressive strength (1981 MPa) and the best plasticity among glassy Cu55-xZra7TisInx (x_〈5). The total plastic deformation of Cu52Zr37TisIn3 before fracture approaches 1.2%. 展开更多
关键词 Cu-Zr-Ti-In alloy INDIUM cu-based alloy bulk metallic glass glass forming ability mechanical properties
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Effect of consolidation parameters on mechanical properties of Cu-based bulk amorphous alloy consolidated by hot pressing 被引量:1
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作者 蔡安辉 熊翔 +5 位作者 刘咏 安伟科 周果君 罗云 李铁林 李小松 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2012年第8期2032-2040,共9页
Cu50Zr40Ti10 bulk amorphous alloys were fabricated by hot pressing gas-atomized Cu50Zr40Ti10 amorphous powder under different consolidation conditions without vacuum and inert gas protection. The consolidation conditi... Cu50Zr40Ti10 bulk amorphous alloys were fabricated by hot pressing gas-atomized Cu50Zr40Ti10 amorphous powder under different consolidation conditions without vacuum and inert gas protection. The consolidation conditions of the Cu50Zr40Ti10 amorphous powder were investigated based on an L9(34) orthogonal design. The compression strength and strain limit of the Cu50Zr40Ti10 bulk amorphous alloys can reach up to 1090.4 MPa and 11.9 %, respectively. The consolidation pressure significantly influences the strain limit and compression strength of the compact. But the mechanical properties are not significantly influenced by the consolidation temperature. In addition, the preforming pressure significantly influences not the compression strength but the strain limit. The optimum consolidation condition for the Cu50Zr40Ti10 amorphous powder is first precompacted under the pressure of 150 MPa, and then consolidated under the pressure of 450 MPa and the temperature of 380 °C. 展开更多
关键词 hot pressing cu-based amorphous alloy strain limit CONSOLIDATION mechanical property
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Effects of aspect ratio and loading rate on room-temperature mechanical properties of Cu-based bulk metallic glasses 被引量:1
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作者 蔡安辉 刘咏 +6 位作者 吴宏 丁大伟 安伟科 周果君 罗云 彭勇宜 李小松 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2016年第10期2617-2632,共16页
Room-temperature mechanical properties of Cu50Zr40Ti10-xNix(0≤x≤4,mole fraction,%) bulk metallic glasses (BMG) with aspect ratios in the range of 1:1-2.5:1 and loading rates in the range of1×10^-5-1×... Room-temperature mechanical properties of Cu50Zr40Ti10-xNix(0≤x≤4,mole fraction,%) bulk metallic glasses (BMG) with aspect ratios in the range of 1:1-2.5:1 and loading rates in the range of1×10^-5-1×10^-2s^-1were systematically investigated by room-temperatureuniaxialcompression test.In the condition of an aspect ratio of 1:1, the superplasticity can be clearly observed for Cu50Zr40Ti10BMG when the loading rate is1×10^-4s^-1, while for Cu50Zr40Ti10-xNix(x=1-3, mole fraction, %) BMGs when the loading rate is1×10^-2s^-1. The plastic strain (εp), yielding strength (σy) and fracture strength (σf) of the studied Cu-based BMGs significantly depend on the aspect ratio and the loading rate. In addition, theσyof the studied Cu-based BMGs with an aspect ratio of 1:1 is close to the σfof those with the other aspect ratios when the loading rate is1×10^-2s^-1. The mechanism for the mechanical response to the loading rate and the aspect ratiowas also discussed. 展开更多
关键词 cu-based bulk metallic glasses aspect ratio loading rate PLASTICITY STRENGTH
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Rational design strategies of Cu-based electrocatalysts for CO_(2) electroreduction to C_(2) products 被引量:6
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作者 Shuo Liu Baoshan Zhang +1 位作者 Lihong Zhang Jie Sun 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2022年第8期63-82,I0003,共21页
Electrochemical reduction of CO_(2)(CO_(2)RR)to high value-added chemicals is an effective way to remove excess CO_(2) from the atmosphere.Due to the unique propensity of Cu for valuable hydrocarbons,Cu-based electroc... Electrochemical reduction of CO_(2)(CO_(2)RR)to high value-added chemicals is an effective way to remove excess CO_(2) from the atmosphere.Due to the unique propensity of Cu for valuable hydrocarbons,Cu-based electrocatalysts are the most potential catalysts that allow the conversion of CO_(2) into a variety of C_(2) products such as ethylene and ethanol.Rational design of Cu-based catalysts can improve their directional selectivity to C_(2) products.Hence,in this review,we summarize the recent progress in the mechanistic studies of Cu-based catalysts on reducing CO_(2) to C_(2) products.We focus on three key strategies for efficiently enhancing electrocatalytic performance of Cu-based catalysts,including tuning electronic structure,surface structure,and coordination environment.The correlation between the structural characteristics of Cu-based catalysts and their activity and selectivity to C_(2) products is discussed.Finally,we discuss the challenges in the field of CO_(2) electroreduction to C_(2) products and provide the perspectives to design efficient Cu-based catalysts in the future. 展开更多
关键词 Carbon dioxide cu-based catalysts MECHANISMS Active site regulation
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Microstructure of Cu-based Amorphous Composite Coatings on AZ91D Magnesium Alloy by Laser Cladding 被引量:8
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作者 Kaijin Huang Changsheng Xie T.M. Yue 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2009年第4期492-498,共7页
To improve the sliding wear resistance of AZ91D magnesium alloy, Cu-based amorphous composite coatings made of CuaTTi34Zr11Nis and Cu47Ti34Zr11Ni8+20 wt pct SiC powders were fabricated on AZ91D magnesium alloy by las... To improve the sliding wear resistance of AZ91D magnesium alloy, Cu-based amorphous composite coatings made of CuaTTi34Zr11Nis and Cu47Ti34Zr11Ni8+20 wt pct SiC powders were fabricated on AZ91D magnesium alloy by laser cladding, respectively. SEM (scanning electron microscopy), EDS (energy dispersive X-ray spectroscopy), XRD (X-ray diffraction) and TEM (transmission electron microscopy) techniques were employed to study the phases of the coatings. The results show that the coatings mainly consist of amorphous phase and different intermetallic compounds. The reason of formation of amorphous phase and the function of SiC particles were explained in details. 展开更多
关键词 Laser cladding cu-based amorphous composite coating SiC particle AZ91D magnesium alloy
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Recent advances in Cu-based nanocomposite photocatalysts for CO_2 conversion to solar fuels 被引量:2
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作者 Huan Xie Jingyun Wang +2 位作者 Kemakorn Ithisuphalap Gang Wu Qing Li 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2017年第6期1039-1049,共11页
COconversion via photocatalysis is a potential solution to address global warming and energy shortage.Photocatalysis can directly utilize the inexhaustible sunlight as an energy source to catalyze the reduction of COt... COconversion via photocatalysis is a potential solution to address global warming and energy shortage.Photocatalysis can directly utilize the inexhaustible sunlight as an energy source to catalyze the reduction of COto useful solar fuels such as CO, CH, CHOH, and CHOH. Among studied formulations, Cubased photocatalysts are the most attractive for COconversion because the Cu-based photocatalysts are low-cost and abundance comparing noble metal-based catalysts. In this literature review, a comprehensive summary of recent progress on Cu-based photocatalysts for COconversion, which includes metallic copper, copper alloy nanoparticles(NPs), copper oxides, and copper sulfides photocatalysts, can be found. This review also included a detailed discussion on the correlations of morphology, structure, and performance for each type of Cu-based catalysts. The reaction mechanisms and possible pathways for productions of various solar fuels were analyzed, which provide insight into the nature of potential active sites for the catalysts. Finally, the current challenges and perspective future research directions were outlined, holding promise to advance Cu-based photocatalysts for COconversion with much-enhanced energy conversion efficiency and production rates. 展开更多
关键词 cu-based photocatalyst CO_2 conversion Solar light Solar fuels Quantum efficiency
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Accelerated prediction of Cu-based single-atom alloy catalysts for CO_(2) reduction by machine learning 被引量:2
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作者 Dashuai Wang Runfeng Cao +5 位作者 Shaogang Hao Chen Liang Guangyong Chen Pengfei Chen Yang Li Xiaolong Zou 《Green Energy & Environment》 SCIE EI CAS CSCD 2023年第3期820-830,共11页
Various strategies,including controls of morphology,oxidation state,defect,and doping,have been developed to improve the performance of Cu-based catalysts for CO_(2) reduction reaction(CO_(2)RR),generating a large amo... Various strategies,including controls of morphology,oxidation state,defect,and doping,have been developed to improve the performance of Cu-based catalysts for CO_(2) reduction reaction(CO_(2)RR),generating a large amount of data.However,a unified understanding of underlying mechanism for further optimization is still lacking.In this work,combining first-principles calculations and machine learning(ML)techniques,we elucidate critical factors influencing the catalytic properties,taking Cu-based single atom alloys(SAAs)as examples.Our method relies on high-throughput calculations of 2669 CO adsorption configurations on 43 types of Cu-based SAAs with various surfaces.Extensive ML analyses reveal that low generalized coordination numbers and valence electron number are key features to determine catalytic performance.Applying our ML model with cross-group learning scheme,we demonstrate the model generalizes well between Cu-based SAAs with different alloying elements.Further,electronic structure calculations suggest surface negative center could enhance CO adsorption by back donating electrons to antibonding orbitals of CO.Finally,several SAAs,including PCu,AgCu,GaCu,ZnCu,SnCu,GeCu,InCu,and SiCu,are identified as promising CO_(2)RR catalysts.Our work provides a paradigm for the rational design and fast screening of SAAs for various electrocatalytic reactions. 展开更多
关键词 cu-based single-atom alloy CO adsorption Machine learning First principles CO_(2)reduction reaction
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Formation Mechanism of Curved Martensite Structures in Cu-based Shape Memory Alloys 被引量:2
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作者 Yujun BAI, Qiquan SHI,Guili GENG, Dongsheng SUN and Xiufang BIAN (Institute of Materials Engineering, Shandong University of Technology, Jinan 250061, China) 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2000年第1期79-81,共3页
The curved martensite structures have been observed in CuZnAI-based shape memory alloys by both transmission electron microscope and optical microscope. It was found that the curved martensite structures observed in a... The curved martensite structures have been observed in CuZnAI-based shape memory alloys by both transmission electron microscope and optical microscope. It was found that the curved martensite structures observed in as-solution treated, as-aged and as-trained alloys usually occurred around dislocation tangles or precipitate, at the plate boundary or grain boundary, and when the growing plates collided with each other or alternate mutually. 展开更多
关键词 Formation Mechanism of Curved Martensite Structures in cu-based Shape Memory Alloys CU
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Cycle performance of Cu-based oxygen carrier based on a chemical-looping combustion process 被引量:1
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作者 Xiaoming Zheng Lixin Che +1 位作者 Yanqiong Hao Qingquan Su 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2016年第1期101-109,共9页
The cycle life of oxygen carrier(OC) is crucial to the practical applications of chemical looping combustion(CLC). Cycle performance of Cu/SiO2 prepared with a mechanical mixing method was evaluated based on a CLC... The cycle life of oxygen carrier(OC) is crucial to the practical applications of chemical looping combustion(CLC). Cycle performance of Cu/SiO2 prepared with a mechanical mixing method was evaluated based on a CLC process characterized with an added methane steam reforming step. The Cu/SiO2 exhibited high redox reactivity in the initial cycles, while the performance degraded with cycle number. Through characterization of the degraded Cu/SiO2, the performance degradation was mainly caused by the secondary particles' fragmentation and the fine particles' local agglomeration, which worsened the distribution and diffusion of the reactive gases in the packed bed. A regeneration method of the degraded OC based on re-granulation has been proposed, and its mechanism has been illustrated. With this method, the performance of the degraded OC through 420 redox cycles was recovered to a level close to the initial one. 展开更多
关键词 Chemical-looping combustion cu-based oxygen carrier Cycle life
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Carbon Nano-tube Supported Cu-based Catalyst for Methanol Synthesis Developed by Xiamen University
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《China Petroleum Processing & Petrochemical Technology》 SCIE CAS 2008年第4期44-44,共1页
The Chemistry and Chemical Engineering School of Xiamen University has successfully developed the multi-walled nanotube catalyst with small and uniform diameter and has mastered the corresponding technology for manufa... The Chemistry and Chemical Engineering School of Xiamen University has successfully developed the multi-walled nanotube catalyst with small and uniform diameter and has mastered the corresponding technology for manufacture of carbon nanotube. It is learned that this technology has been for the first time developed inside ;and has reached the internationally advanced level with some indicators commanding a globally leading position. 展开更多
关键词 cu-based CATALYST Chemical Engineering SCHOOL China multi-walled
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Fabrication of highly dispersed carbon doped Cu-based oxides as superior selective catalytic oxidation of ammonia catalysts via employing citric acid-modified carbon nanotubes doping CuAl-LDHs
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作者 Fengrong Li Xuezhen Liu +3 位作者 ZhengYi Zhao Xia An Yali Du Xu Wu 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2023年第11期185-196,共12页
In this work,the CuAl-LDO/c-CNTs catalyst was fabricated via in situ oriented assembly of layered-double hydroxides(LDHs)and citric acid-modified carbon nanotubes(c-CNTs)followed by annealing treatment,and evaluated i... In this work,the CuAl-LDO/c-CNTs catalyst was fabricated via in situ oriented assembly of layered-double hydroxides(LDHs)and citric acid-modified carbon nanotubes(c-CNTs)followed by annealing treatment,and evaluated in the selective catalytic oxidation(SCO)of NH_(3)to N_(2).The CuAl-LDO/c-CNTs catalyst presented better catalytic performance(98%NH_(3)conversion with nearly 90%N_(2)selectivity at 513 K)than other catalysts,such as CuAlO_(x)/CNTs,CuAlO_(x)/c-CNTs and CuAl-LDO/CNTs.Multiple characterizations were utilized to analyze the difference of physicochemical properties among four catalysts.XRD,TEM and XPS analyses manifested that CuO and Cu_(2)O nanoparticles dispersed well on the surface of the Cu Al-LDO/c-CNTs catalyst.Compared with other catalysts,larger specific surface area and better dispersion of CuAl-LDO/c-CNTs catalyst were conducive to the exposure of more active sites,thus improving the redox capacity of the active site and NH_(3)adsorption capacity.In-situ DRIFTS results revealed that the internal selective catalytic reduction(iSCR)mechanism was found over CuAl-LDO/c-CNTs catalyst. 展开更多
关键词 Selective catalytic oxidation of ammonia Layered-double hydroxides cu-based oxides CNTS Citric acid-modified
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The newly-assisted catalytic mechanism of surface hydroxyl species performed as the promoter in syngas-to-C2 species on the Cu-based bimetallic catalysts
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作者 Chenyang Li Yuan Zhang +4 位作者 Debao Li Baojun Wang Christopher K.Russell Maohong Fan Riguang Zhang 《Green Energy & Environment》 SCIE EI CSCD 2023年第2期487-498,共12页
In the conversion process of syngas-to-C_(2)species,the OH species are inevitably produced accompanying the production of key intermediates CH_(x)(x=1-3),traditionally,the function of surface OH species is generally a... In the conversion process of syngas-to-C_(2)species,the OH species are inevitably produced accompanying the production of key intermediates CH_(x)(x=1-3),traditionally,the function of surface OH species is generally accepted as the hydrogenating reactive species.This work for the first time proposed and confirmed the assisted catalytic mechanism of surface OH species that performed as the promoter for syngas-to-C_(2)species on Cu-based catalysts.DFT and microkinetic modeling results reveal that the produced OH species accompanying the intermediates CH_(x)production on the MCu(M=Co,Fe,Rh)catalysts can stably exist to form OH/MCu catalysts,on which the presence of surface OH species as the promoter not only presented better activity and selectivity toward CH_(x)(x=1-3)compared to MCu catalysts,but also significantly suppressed CH_(3)OH production,providing enough CH_(x)sources to favor the production of C_(2)hydrocarbons and oxygenates.Correspondingly,the electronic properties analysis revealed the essential relationship between the electronic feature of OH/MCu catalysts and catalytic performance,attributing to the unique electronic micro-environment of the catalysts under the interaction of surface OH species.This new mechanism is called as OH-assisted catalytic mechanism,which may be applied in the reaction systems related to the generation of OH species. 展开更多
关键词 Syngas conversion C_(2)species cu-based catalyst Surface OH species Assisted catalytic mechanism
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髂骨来源的“双相”BMG结合软骨细胞修复兔关节软骨缺损的实验研究 被引量:2
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作者 白亦光 陈巧玲 +2 位作者 肖东琴 刘康 冯刚 《川北医学院学报》 CAS 2016年第5期652-655,共4页
目的:探讨应用髂骨来源的"双相"骨基质明胶(bone matrix gelatin,BMG)结合软骨细胞移植修复兔关节软骨缺损的有效性和可行性。方法:使用酶消化法体外分离培养并扩增兔肋软骨细胞;使用自体来源髂骨构建"双相"BMG支... 目的:探讨应用髂骨来源的"双相"骨基质明胶(bone matrix gelatin,BMG)结合软骨细胞移植修复兔关节软骨缺损的有效性和可行性。方法:使用酶消化法体外分离培养并扩增兔肋软骨细胞;使用自体来源髂骨构建"双相"BMG支架材料;将软骨细胞种植与BMG支架材料上构建成为细胞-BMG复合物;将制作好的27只软骨缺损动物模型随机分为3组。将细胞-BMG复合物移植于软骨缺损模型进行修复治疗作为实验组。将BMG支架移植入软骨缺损模型作为材料组;空白对照组不做处理。分别在术后4周、8周和12周通过大体形态学(依据国际软骨修复协会评分量表)、病理组织学染色及免疫组织化学染色方法对各组修复效果进行评价。结果:番红O染色,甲苯胺蓝染色和Collagen II免疫组化染色分别提示术后12周时实验组的修复组织非常类似于正常关节软骨,组织表面与正常软骨组织平面几乎持平,材料组软骨缺损处得到了部分修复,而缺损组的修复效果较差。按照ICRS量表,大体形态学和病理组织学评分结果提示:术后12周实验组的修复效果与其他两组相比有明显统计学差异(P<0.05)。结论:自体髂骨来源的"双相"BMG结合软骨细胞在体内可形成具有一定结构功能的软骨组织,能够应用于再生修复软骨的缺损。 展开更多
关键词 软骨细胞 bmg支架材料 软骨修复 组织工程
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不同温度和应变率下W_f/BMG的力学性能
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作者 侯兵 李玉龙 《材料科学与工程学报》 CAS CSCD 北大核心 2008年第1期110-113,133,共5页
本文对纤维体积百分含量(Vf)为60%的钨丝增强Zr41.25Ti13.75Ni10Cu12.5Be22.5大块非晶基体复合材料(Wf/BMG)的力学性能进行了试验研究,测得该材料在77K到473K温度变化范围内的动静态应力应变曲线,发现其流动应力具有明显的正应变率敏感... 本文对纤维体积百分含量(Vf)为60%的钨丝增强Zr41.25Ti13.75Ni10Cu12.5Be22.5大块非晶基体复合材料(Wf/BMG)的力学性能进行了试验研究,测得该材料在77K到473K温度变化范围内的动静态应力应变曲线,发现其流动应力具有明显的正应变率敏感性;随着试验环境温度的升高,材料的弹性模量、屈服应力不断降低,材料的最终塑性应变值则呈升高趋势;Wf/BMG的断裂模式主要为剪切和纵向劈裂及二者的复合,具体形式受钨丝和基体界面的结合强度影响;钨丝的加入限制剪切带的传播,在界面处形成多条剪切带是复合材料塑性提高的主要原因;Wf/BMG的屈服与基体中由于绝热加热降低粘性而形成的剪切带有关,环境温度和非晶基体玻璃转变温度之差则直接影响剪切带的生成,使得Wf/BMG的屈服极限具有一定的温度敏感性。 展开更多
关键词 大块非晶(bmgs) 复合材料 力学性能 温度敏感性 剪切带
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家蚕G蛋白γ亚基BmGγ30A的克隆及其原核表达
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作者 章玉萍 范涛 +6 位作者 蒋剑豪 代君君 王储炎 吴传华 田善富 肖林珍 樊美珍 《中国蚕业》 2011年第1期8-14,共7页
异三元G蛋白是真核细胞感知外界信号后将信号传递到胞内的重要分子,参与生物体广泛的信号转导。为了研究G蛋白在家蚕中的生理功能及其作用机理,运用生物信息学方法预测到家蚕Gγ的一段序列,通过设计特异性引物、PCR和RACE技术,克隆得到... 异三元G蛋白是真核细胞感知外界信号后将信号传递到胞内的重要分子,参与生物体广泛的信号转导。为了研究G蛋白在家蚕中的生理功能及其作用机理,运用生物信息学方法预测到家蚕Gγ的一段序列,通过设计特异性引物、PCR和RACE技术,克隆得到家蚕Gγ30A的序列。随后将该蛋白成熟肽cDNA片段通过酶切克隆至表达载体pET-41b(+),并导入E.coli BI21宿主菌中进行诱导表达。家蚕Gγ30A重组GST融合蛋白经SDS-PAGE和Western blot分析,在相对分子量约38 KDa处,出现特异性蛋白条带,表达方式分析发现融合蛋白在上清和包涵体中均有表达;试验结果说明我们已成功克隆到家蚕Gγ30A基因(GeneBank登录号:HQ699664),并在E.coli BL21中高效表达。 展开更多
关键词 家蚕 G蛋白γ亚基 克隆 bmgγ30A基因 原核表达
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家蚕G蛋白α亚基基因BmGα73B原核表达及其表达条件优化
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作者 汤强 方玲 章玉萍 《中国蚕业》 2012年第3期19-22,共4页
通过RT-PCR技术从家蚕中扩增出G蛋白α亚基基因BmGα73B的cDNA,克隆至原核表达载体pET-41b(+)中,所获得的重组质粒经酶切鉴定后,将其转化至E coli BL21诱导表达,用SDS-PAGE与Western blot对表达产物进行鉴定。结果表明,通过RT-PCR扩增... 通过RT-PCR技术从家蚕中扩增出G蛋白α亚基基因BmGα73B的cDNA,克隆至原核表达载体pET-41b(+)中,所获得的重组质粒经酶切鉴定后,将其转化至E coli BL21诱导表达,用SDS-PAGE与Western blot对表达产物进行鉴定。结果表明,通过RT-PCR扩增获得长度为1 158 bp的蛋白基因,诱导表达重组质粒pET-41b(+)-Gα73B,经SDS-PAGE检测,IPTGr的终浓度为1 mmol/L时,诱导4 h时蛋白表达量最高,出现分子质量约为73 kD的目的蛋白带,与蛋白的理论值相符。经Western blot检测,表达产物可与GST发生特异性反应。 展开更多
关键词 G蛋白α亚基 bmgα73B RT-PCR 克隆 原核表达
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英巴卡迪诺助BMG自如应对海量数据挑战
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作者 赵经纬 《通信世界》 2009年第8期I0029-I0029,共1页
贝塔斯曼德国/瑞典/奥地利(德瑞奥)公司是贝塔斯曼音乐集团(BMG)欧洲公司的分支机构,公司主要在德语国家组织娱乐节目和艺术表演,旗下拥~{Ariola、Arista Records、Cheeky、J-Records、Haylsa、RCA Records、Europa、Aris、Amig... 贝塔斯曼德国/瑞典/奥地利(德瑞奥)公司是贝塔斯曼音乐集团(BMG)欧洲公司的分支机构,公司主要在德语国家组织娱乐节目和艺术表演,旗下拥~{Ariola、Arista Records、Cheeky、J-Records、Haylsa、RCA Records、Europa、Aris、Amiga、GUN、LowSpirit、Reverso、Arte Nova等品牌。作为世界顶级的音乐组织,BMG在全球42个国家拥有200余家品牌机构,拥有世界上最大的唱片发行机构。 展开更多
关键词 bmg 海量数据 分支机构 ARIS 奥地利 RCA 音乐 组织
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