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Tuned selectivity and enhanced activity of CO_(2) methanation over Ru catalysts by modified metal-carbonate interfaces

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Journal of Energy Chemistry 2022年第1期31卷 38-46,I0002页

作者： qiaojuan wang Yating Gao Chantsalmaa Tumurbaatar Tungalagtamir Bold Fei Wei Yihu Dai Yanhui Yang Institute of Advanced Synthesis School of Chemistry and Molecular EngineeringNanjing Tech UniversityNanjing 211816JiangsuChina School of Applied Sciences Mongolian University of Science and TechnologyUlaanbaatar 14191Mongolia Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology Department of Chemical EngineeringTsinghua UniversityBeijing 100084China

Carbonate-modified metal-support interfaces allow Ru/MnCO_(3) catalyst to exhibit over 99% selectivity,great specific activity and long-term anti-CO poisoning stability in atmospheric CO_(2) *** a contrast,Ru/MnO catalyst with metal-oxide interfaces prefers reverse water-gas shift rather than methanation route,along with a remarkably lower activity and a less than 15% CH_(4) *** carbonatemodified interfaces are found to stabilize the Ru species and activate CO_(2) and H_(2) ***-CO^(4) species are identified as the reaction intermediates steadily formed from CO_(2) dissociation,which show moderate adsorption strength and high reactivity in further hydrogenation to CH_(4),Furthermore,carbonates of Ru/MnCO_(3) are found to be consumed by hydrogenation to form CH_(4) and replenished by exchange with CO_(2),which are in a dynamic equilibrium during the *** with surface carbonates is proved as an efficient strategy to endow metal-support interfaces of Ru-based catalysts with unique catalytic functions for selective CO_(2) hydrogenation.

关键词： C0_(2)methanation Ru catalyst MnO Carbonate Metal-support interface

An extended micromechanical-based plastic damage model for understanding water effects on quasi-brittle rocks

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International Journal of Mining Science and Technology 2024年第3期34卷 289-304页

作者： qiaojuan Yu Shigui Du Qizhi Zhu Zhanyou Luo Sili Liu Lunyang Zhao Institute of Rock Mechanics Ningbo UniversityNingbo 315211China Ningbo Key Laboratory of Energy Geostructure Ningbo UniversityNingbo 315211China College of Civil and Transportation Engineering Hohai UniversityNanjing 210098China College of Civil Engineering Jiangsu Open UniversityNanjing 210036China South China Institution of Geotechnical Engineering School of Civil Engineering and TransportationSouth China University of TechnologyGuangzhou 510641China

Water effects on the mechanical properties of rocks have been extensively investigated through experiments and numerical ***,few studies have established a comprehensive link between the microscopic mechanisms of water-related micro-crack and the constitutive behaviors of *** this work,we shall propose an extended micromechanical-based plastic damage model for understanding weakening effect induced by the presence of water between micro-crack’s surfaces on quasi-brittle rocks,based on the Mori-Tanaka homogenization and irreversible thermodynamics *** the physical mechanism,water strengthens micro-crack propagation,which induces damage evolution during the pre-and post-stage,and weakens the elastic effective properties of rock *** proposing a special calibration procedure for the determination of model parameters based on the laboratory compression tests,the proposed micromechanical-based model is verified by comparing the model predictions to the experimental *** model effectively captures the mechanical behaviors of quasibrittle rocks subjected to the weakening effects of water.

关键词： Water Micro-crack Damage Micro-mechanics Constitutive model Cohesive force

Epilithic biofilm as a reservoir for functional virulence factors in wastewater-dominant rivers after WWTP upgrade

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Journal of Environmental Sciences 2021年第3期33卷 27-35页

作者： Guannan Mao Jinsong Liang qiaojuan wang Chen Zhao Yaohui Bai Ruiping Liu Huijuan Liu Jiuhui Qu Key Laboratory of Drinking Water Science and Technology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China Harbin Institute of Technology School of Civil and Environmental EngineeringShenzhen 518055China University of Chinese Academy of Sciences Beijing 100049China Center for Water and Ecology State Key Joint Laboratory of Environment Simulation and Pollution ControlSchool of EnvironmentTsinghua UniversityBeijing 100084China

Virulence factors(VFs)confer upon pathogens the ability to cause various types of damage or *** treatment plants(WWTPs)are important point sources for the emission of pathogens and VFs into receiving *** WWTP upgrades are often implemented to improve the water quality of receiving ***,knowledge on the pathogens,VFs,and health risks to receiving aquatic ecosystems after upgrade remains *** this study,we investigated detailed pathogenic information,including taxa,pathogenicity,and health risk,in two wastewater-dominant rivers after WWTP *** 16S rRNA gene sequencing,we screened 14 potential pathogens in water and epilithic biofilm samples,though they were significantly more enriched in the *** 16S rRNA and metagenomic sequencing data,we identified Pseudomonas and Aeromonas as the dominant pathogenic taxa carrying functional VFs(e.g.,mobility and offensive)in the epilithic ***,strong pathogen-specific VF-host co-occurrence events were observed in the epilithic biofilm samples,indicating the importance of biofilms as reservoirs and vehicles for ***,we demonstrated that mobility VF is crucial for biofilm formation and pathogens in biofilm carrying offensive VF may be highly *** and health risk assessment suggested that the skin contact risk of *** carrying VFs was higher than the acceptable probability of 10^(-4)in both water and epilithic biofilm samples,which may threaten ecological and human health.

关键词： Wastewater treatment plant upgrade Epilithic biofilm Pathogens Virulence factors Health risk

黔东苗语反身义noη^(31)的多功能性及其语法化路径

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民族语文 2024年第1期 62-75页

作者：唐巧娟凯里学院期刊社凯里556001

黔东苗语noη^(31)兼表“各”“自”义,与多主体主语组合时凸显“各”义泛指功能,与单主体主语组合时凸显“自”义反身功能。“自”义non31作为典型的反身代词,具备照应和强化两种功能。noη^(31)的情态语气功能主要包括强化肯定、反转... 详细信息

黔东苗语noη^(31)兼表“各”“自”义,与多主体主语组合时凸显“各”义泛指功能,与单主体主语组合时凸显“自”义反身功能。“自”义non31作为典型的反身代词,具备照应和强化两种功能。noη^(31)的情态语气功能主要包括强化肯定、反转和惊语气;noη^(31)的语篇功能主要强化前后分句的因果、条件和转折关系。从历时层面来看,noη^(31)从“各”义泛指到“自”义反身,从对句内成分到对句外成分的回指,从对概念功能到对情态语气再到对语篇关系的强化,都体现了其语法化特征。

关键词：苗语反身照应功能强化功能语法化

甲氨蝶呤、子宫动脉栓塞术联合宫腔镜对剖宫产瘢痕妊娠患者术后康复的影响

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临床医学研究与实践 2022年第6期7卷 48-50页

作者：王巧娟宋淑敏河南省濮阳市濮阳县人民医院河南濮阳457100 河南省安阳市妇幼保健院河南安阳455000

目的分析甲氨蝶呤、子宫动脉栓塞术(UAE)联合宫腔镜对剖宫产瘢痕妊娠(CSP)患者术后康复的影响。方法选择2019年4月至2021年4月我院收治的86例CSP患者为研究对象,根据治疗方式将其分为对照组(n=43,甲氨蝶呤联合UAE治疗)和试验组(n=43,甲... 详细信息

目的分析甲氨蝶呤、子宫动脉栓塞术(UAE)联合宫腔镜对剖宫产瘢痕妊娠(CSP)患者术后康复的影响。方法选择2019年4月至2021年4月我院收治的86例CSP患者为研究对象,根据治疗方式将其分为对照组(n=43,甲氨蝶呤联合UAE治疗)和试验组(n=43,甲氨蝶呤、UAE联合宫腔镜治疗)。比较两组的治疗效果。结果试验组的术后阴道出血量少于对照组,持续出血时间、术后住院时间、HGG转阴时间、月经恢复时间短于对照组(P0.05)。术后,试验组的CD4+、CD4+/CD8+高于对照组,CD8+低于对照组(P<0.05)。结论甲氨蝶呤、UAE联合宫腔镜治疗CSP效果显著,有助于促进患者术后康复,且卵巢功能与免疫功能并未受到严重影响。

关键词：剖宫产瘢痕妊娠甲氨蝶呤子宫动脉栓塞术宫腔镜

双侧子宫动脉栓塞术结合清宫术治疗剖宫产后瘢痕妊娠患者的效果

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临床医学研究与实践 2022年第8期7卷 33-35页

作者：王巧娟宋淑敏河南省濮阳市濮阳县人民医院河南濮阳457100 河南省安阳市妇幼保健院河南安阳455000

目的分析双侧子宫动脉栓塞术结合清宫术治疗剖宫产后瘢痕妊娠患者的效果。方法将我院2019年4月至2021年4月收治的78例剖宫产后瘢痕妊娠患者纳入研究,根据临床手术方案的不同将其分为常规组(39例,清宫术治疗)和观察组(39例,双侧子宫动脉... 详细信息

目的分析双侧子宫动脉栓塞术结合清宫术治疗剖宫产后瘢痕妊娠患者的效果。方法将我院2019年4月至2021年4月收治的78例剖宫产后瘢痕妊娠患者纳入研究,根据临床手术方案的不同将其分为常规组(39例,清宫术治疗)和观察组(39例,双侧子宫动脉栓塞术结合清宫术治疗)。比较两组的治疗效果。结果观察组的手术时间、血β-HCG恢复正常时间、月经恢复正常时间短于常规组,术中出血量、术后24 h出血量少于常规组,术后大出血发生率低于常规组(P<0.05)。术后40 d,观察组的FSH、LH、E2及血β-HCG水平均显著低于常规组(P<0.05)。术后30 d,观察组的PSV、PI高于常规组,RI低于常规组(P<0.05)。结论双侧子宫动脉栓塞术结合清宫术治疗剖宫产后瘢痕妊娠患者效果显著。

关键词：瘢痕妊娠双侧子宫动脉栓塞术清宫术

非一致性条件下输沙对降水与径流的响应变化研究

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水资源开发与管理 2022年第8期8卷 30-35,47页

作者：陈凯吴彦昭王巧娟甘肃省庆阳水文站甘肃庆阳745000 甘肃省水文站甘肃兰州730000 甘肃省陇南水文站甘肃陇南742500

为深入研究降水、径流与输沙变化之间的响应关系,选取长江上游主要输沙河流西汉水,采用该流域1960—2019年降水、径流、输沙系列资料,利用双累积曲线法找出突变年份,确定一致性时段;采用Pearson、Correl相关系数对输沙率与降水量、流量... 详细信息

为深入研究降水、径流与输沙变化之间的响应关系,选取长江上游主要输沙河流西汉水,采用该流域1960—2019年降水、径流、输沙系列资料,利用双累积曲线法找出突变年份,确定一致性时段;采用Pearson、Correl相关系数对输沙率与降水量、流量进行相关性分析,找出与同输沙率相关程度较大的影响因素,并分时段建立输沙对降水、径流响应变化的线性和非线性回归方程,以SSE、RMSE、R-square值分析拟合度。结果表明,西汉水流域降水、径流对输沙的影响程度在1993年发生突变,表明流域下垫面条件在1993年以后得到明显改善;流量与输沙率的相关程度高于降水量与输沙率的相关程度。

关键词：水沙关系双累积曲线法 Pearson相关系数水土保持西汉水

瓜尔豆胶甘露寡糖对链脲佐菌素诱导糖尿病小鼠的降血糖作用

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食品科学 2024年第16期45卷 113-120页

作者：程教擘李延啸王楠楠闫巧娟江正强中国农业大学食品科学与营养工程学院中国轻工业食品生物工程重点实验室北京100083 中国农业大学工学院北京100083 河南工业大学粮油食品学院河南郑州450001 中原食品实验室河南漯河462333

目的:研究瓜尔豆胶甘露寡糖(guar gum manno-oligosaccharides,GMOS)对链脲佐菌素诱导糖尿病小鼠的降血糖效果及作用机制。方法:采用GMOS干预糖尿病小鼠6周,监测小鼠体质量和胰岛素抵抗状态变化并测定血清中葡萄糖、胰岛素、高密度脂蛋... 详细信息

目的:研究瓜尔豆胶甘露寡糖(guar gum manno-oligosaccharides,GMOS)对链脲佐菌素诱导糖尿病小鼠的降血糖效果及作用机制。方法:采用GMOS干预糖尿病小鼠6周,监测小鼠体质量和胰岛素抵抗状态变化并测定血清中葡萄糖、胰岛素、高密度脂蛋白胆固醇(high density lipoprotein cholesterol,HDL-C)、低密度脂蛋白胆固醇(low density lipoprotein cholesterol,LDL-C)等糖脂代谢相关指标水平,观察肝脏组织形态学变化,同时检测肝脏中腺苷酸活化蛋白激酶(adenosine monophosphate-activated protein kinase,AMPk)/过氧化物酶增殖活化受体γ辅激活因子1α(peroxisome proliferator-activated receptorγcoactivator 1α,PGC-1α)信号通路相关蛋白的表达情况及抗氧化酶活性。结果:GMOS可以有效缓解糖尿病小鼠体质量减轻,明显改善其葡萄糖耐量(30.3%)和胰岛素敏感性(34.6%);体内葡萄糖、糖化血清蛋白和LDL-C含量较模型组小鼠分别降低38.6%、29.5%和27.3%,而胰岛素和HDL-C水平显著提高;有效减轻肝组织氧化损伤,激活肝脏AMPk/PGC-1α信号通路,提高肝脏内超氧化物歧化酶和过氧化氢酶活性。结论:GMOS具有降血糖效果,能够改善由糖尿病引发的糖脂代谢紊乱和氧化应激,具有作为抗糖尿病功能性食品配料的潜力。

关键词：瓜尔豆胶甘露寡糖降血糖糖脂代谢信号通路

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清前期西南边疆民族政策的动态考察

广西民族研究 2017年第5期 131-138页

作者：马亚辉王巧娟百色学院民族研究中心广西百色533000 2百色学院图书馆广西百色533000

在清前期,西南边疆的民族政策是一个动态变化的过程。从顺治朝的"柔远抚绥",到康熙朝的"恩威并施",再到雍正朝的"改土归流",可谓环环相扣,层层深入。在逐步实施政治措施的同时,清政府又辅以长时段的"文化治边"举措。这种民族政策的动态... 详细信息

在清前期,西南边疆的民族政策是一个动态变化的过程。从顺治朝的"柔远抚绥",到康熙朝的"恩威并施",再到雍正朝的"改土归流",可谓环环相扣,层层深入。在逐步实施政治措施的同时,清政府又辅以长时段的"文化治边"举措。这种民族政策的动态变化,使清朝对西南边疆土司地区的治理发生了从羁縻到直辖的转变,并将西南边疆牢固地系隶于中国版图之中。

关键词：清朝西南边疆民族政策