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Formation of active oxygen species on single-atom Pt catalyst and promoted catalytic oxidation of toluene

Nano Research 2020年第6期13卷 1544-1551页

作者： Shunzheng Zhao Yanfeng Wen Xijun Liu Xianyun pen Fang Lü Fengyu Gao Xizhou Xie Chengcheng Du Honghong Yi Dongjuan Kang Xiaolong Tang Department of Environmental Engineering University of Science and Technology BeijingBeijing100083China Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants Beijing100083China Center for Electron Microscopy and Tianjin Key Lab of Advanced Functional Porous Materials Institute for New Energy Materials&Low-Carbon TechnologiesSchool of Materials Science and EngineeringTianjin University of TechnologyTianjin300384China

Catalytic oxidation of toluene over noble metal catalysts is a representative reaction for elimination of volatile organic compounds(VoCs).However,to fully understand the activation of molecular oxygen and the role of active oxygen species generated in this reaction is still a challenging ***,Mgo nanosheets and single-atom Pt loaded Mgo(Pt SA/Mgo)nanosheets were synthesized and used as catalysts in toluene *** activation process of molecular oxygen and oxidation performance on the two catalysts were contrastively *** Pt SA/Mgo exhibited significantly enhanced catalytic activity compared to *** oxygen vacancies can be easily generated on the Pt SA/Mgo surface,which facilitate the activation of molecular oxygen and the formation of active oxygen *** on the experimental data and theoretical calculations,an active oxygen species promoted oxidation mechanism for toluene was *** the presence of H2o,the molecular oxygen is more favorable to be dissociated to generate•oH on the oxygen vacancies of the Pt SA/Mgo surface,which is the dominant active oxygen *** anticipate that this work may shed light on further investigation of t10.1007/s12274-020-2765-1he oxidation mechanism of toluene and other VoCs over noble metal catalysts.

关键词： single-atom Pt activation of molecular oxygen oxygen vacancies active oxygen species oxidation of toluene

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肝动脉灌注化疗联合仑伐替尼及PD-1抑制剂治疗晚期肝癌后消化道多处穿孔一例

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肝胆胰外科杂志 2024年第5期36卷 302-305页

作者：刘张苑珠李慧龙莫嘉强彭建新广东省中医院肝胆外科广东广州510120

目前对于没有手术机会的晚期肝癌患者,局部介入治疗联合靶免药物全身治疗表现出良好的临床效果,为这部分患者带来了显著的生存获益。2022年10月24日广东省中医院肝胆外科收治的一例晚期肝癌患者,接受了3程FoLFoX方案肝动脉灌注化疗及替... 详细信息

目前对于没有手术机会的晚期肝癌患者,局部介入治疗联合靶免药物全身治疗表现出良好的临床效果,为这部分患者带来了显著的生存获益。2022年10月24日广东省中医院肝胆外科收治的一例晚期肝癌患者,接受了3程FoLFoX方案肝动脉灌注化疗及替雷利珠单抗免疫治疗,同时联合仑伐替尼靶向治疗,肿瘤明显缩小,AFP降至正常,获得了良好的肿瘤学疗效。但在综合治疗10周后,患者出现了胆囊、胆总管、十二指肠穿孔,笔者团队讨论分析穿孔原因为介入治疗、靶向药物、PD-1抑制剂综合作用导致组织缺血、坏死,考虑介入联合靶免综合治疗在抗肿瘤疗效上存在协同作用,在不良反应方面也可能存在叠加效应。临床上为晚期肝癌患者实施三联综合治疗时应关注、重视其安全性,严密监测患者的不良反应,及时干预,避免严重并发症发生。

关键词：肝癌消化道穿孔仑伐替尼肝动脉灌注化疗 PD-1抑制剂

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THE EXTREME PoINTS oF SEVERAL CLASSES oFANALYTIC FUNCTIoNS

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Acta Mathematica Scientia 1999年第4期19卷 457-462页

作者：彭志刚 College of Mathematics and Computer Science Hubei University Wuhan 430062 China

Let P-n(c(1),c(2),...,c(n-1)) = {p(z) : p(z) is analytic in \z\ 0 and p(z) = 1 + c(1)z + c(2)z(2) +...+ c(n-1)z(n-1) + d(n)z(n) +..., where c(1),c(2),...,c(n-1) are fixed complex constants}. Let P-R,P-n(b(1),b(2),...,b(n-1)) = {p(z) : p(z) is analytic in \z\ 0 and p(z) = 1 + b(1)z + b(2)z(2) +...+ b(n-1)z(n-1) + d(n)z(n) +..., where b(1),b(2),...,b(n-1) are fixed real constants and the coefficients of p(z) are real}. Let T-n(l(1),l(2),...,l(n-1)) = {f(z) : f(z) is analytic in \z\ onstants and the coefficients of f(z) are real}. It is understood that P-n(c(1),c(2),...,c(n-1)), P-R,P-n(b(1),b(2),...,b(n-1)) and T-n(l(1),l(2),...,l(n-1)) are not empty when the constants c(k)(k = 1,...,n-1), b(k)(k = 1,2,...,n-1) and l(k)(k = 1,...,n-1) satisfy certain conditions. This paper obtaines the extreme points of P-n(c(1),...,c(n-1)), P-R,P-n(b(1),...,b(n-1)) and T-n(l(1),...,l(n-1)).

关键词： Blaschke product extreme point

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Flow Behavior and Microstructures of Inconel 625 Superalloy at the Elevated Temperature

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稀有金属材料与工程 2011年第S3期40卷 95-98页

作者： Li Defu, Guo Shengli, Wu Zhigang, Zou Honghui, pen Haijian General Research Institute for Nonferrous Metals, Beijing 100088, China Gen Res Inst Nonferrous Met Beijing 100088 Peoples R China

The deformation behavior of Inconel 625 superalloy was investigated by means of hot compression tests. The flow stress curves were obtained in the temperature and strain rate ranges of 950-1200 ℃ and 0.01-10 s-1, respectively. optical microscopy was used to evaluate the microstructural evolution of the alloy under different conditions examined. The results show that the flow stress decreases with decreasing strain rate and increasing temperature, and the activation energy is about 654.502 kJ/mol. Microstructure observations show that with increasing temperature, the sizes and volume fraction of dynamic recrystallization (DRX) grains increase. The strain has no remarkably effect on the sizes of DRX grains, but with increasing strain the volume fraction of DRX grains increases. During hot compression of Inconel 625 superalloy at elevated temperature, the occurrence of DRX was the main softening mechanism. The DRX mechanism of Inconel 625 superalloy can be mainly attributed to the discontinuous dynamic recrystallization (DDRX).

关键词： inconel 625 superalloy hot deformation flow stress dynamic recrystallization

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oN WEAK STABILITY oF DISCRETIZATIoN FoR oPERAToR EQUATIoN

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Science China Mathematics 1989年第8期32卷 897-907页

作者：郭本瑜 Shanghai University of Science and Technology

The discretization of operator equation is considered. The weak stability is defined, which is the generalization of stabilities by Strang, Stetter, Keller and the author. Under some conditions, such stability implies the existence of approximate solution and the convergence for the operator equation with isolated solutions. Two examples show how to. use the theorems here.

关键词： weak stability discretization operator equation.

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The biosynthesis and wall-binding of hemicelluloses in cellulose-deficient maize cells:An example of metabolic plasticity

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Journal of Integrative Plant Biology 2015年第4期57卷 373-387页

作者： María de Castro Janice G.Miller José Luis Acebes Antonio Encina penélope García-Angulo Stephen C.Fry The Edinburgh Cell Wall Group Institute of Molecular Plant SciencesSchool of Biological SciencesDaniel Rutherford BuildingThe King's Buildings Laboratory of Plant Physiology Faculty of Biological and Environmental SciencesUniversity of Léon

Cell-suspension cultures（Zea mays L.,Black Mexican sweet corn） habituated to 2,6-dichlorobenzonitrile（DCB） survive with reduced cellulose owing to hemicellulose network modification. We aimed to de fine the hemicellulose metabolism modifications in DCB-habituated maize cells showing a mild reduction in cellulose at different stages in the culture cycle. Using pulse-chase radiolabeling, we fed habituated and non-habituated cultures with [3H]arabinose,and traced the distribution of 3H-pentose residues between xylans, xyloglucans and other polymers in several cellular compartments for 5 h. Habituated cells were slower taking up exogenous [3H]arabinose. Tritium was incorporated into polysaccharide-bound arabinose and xylose residues, but habituated cells diverted a higher proportion of their new [3H]xylose residues into（hetero） xylans at the expense of xyloglucan synthesis. During logarithmic growth, habituated cells showed slower vesicular traf ficking of polymers,especially xylans. Moreover, habituated cells showed a decrease in the strong wall-binding of all pentose-containing polysaccharides studied; correspondingly, especially in log phase cultures, habituation increased the proportion of 3H-hemicelluloses（[3H]xylans and [3H]xyloglucan） sloughed into the medium. These findings could be related to the cel walls’ cellulose-deficiency, and consequent reduction in binding sites for hemicelluloses; the data could also re fl ect the habituated cells’ reduced capacity to integrate arabinox ylans by extra-protoplasmic phenolic cross-linking, as well as xyloglucans, during wall assembly.

关键词： Arabinoxylan cell wall cross-linking 2,6-dichlorobenzonitrile Hemicellulose biosynthesis xyloglucan

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A kind of photonic crystal fiber with high birefringence and low cofinement loss

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optoelectronics Letters 2008年第2期4卷 110-113页

作者： GoNG Tao-rong YAN Feng-ping WANG Lin LIU pen LI Yi-fang JIAN Shui-sheng Key-Laboratory of All- optical networks and Advanced Communication Networks Ministry of Education Beijing Jiatong University Beijing 100044 China Institute of Lightwave Technology Beijing Jiaotong University Beijing 10004 China

The triangular-lattice highly birefringent photonic crystal fibers(PCFs) with gradually increasing diameter of the air holes along radial axis are put forward. The modal birefringence, dispersion and confinement loss of the fundamental mode are simulated by full vector Galerkin finite element method(FEM) with a perfectly matched layer(PML). The results show that this PCF can keep low confinement loss when the rings of air holes are few. When the wavelength is 1.55 μm , the birefringence, the confinement loss of quick-axis and slow-axis are 1.365×10-3, 0.017 dB/m and 0.051 dB/m, respectively. A new way is proposed to fabricate polarization-mainting fibers with high performance.

关键词：光子晶体纤维高双折射低损耗光学元件

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经支气管针吸活检术在呼吸系统疾病诊治中的应用

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中华结核和呼吸杂志 2008年第1期31卷 6-7页

作者：荣福李强 Ko pen Wang 广东顺德第一人民医院呼吸科 528300 上海第二军医大学附属长海医院呼吸科 Chest Diagnostic Center Harbor Hospital Baltimore USA

经支气管针吸活检术（ transbronchial needle aspiration，TBNA）是一种获取气道壁、肺实质以及邻近支气管树纵隔内病变部位的细胞学、组织学或微生物学标本的技术。自上世纪50年代阿根廷医生Schieppatti将硬质气管镜应用于临床以来，... 详细信息

经支气管针吸活检术（ transbronchial needle aspiration，TBNA）是一种获取气道壁、肺实质以及邻近支气管树纵隔内病变部位的细胞学、组织学或微生物学标本的技术。自上世纪50年代阿根廷医生Schieppatti将硬质气管镜应用于临床以来，一直未能在临床上得到应用，直到80年代初将此技术应用于可弯曲支气管镜后，才在临床广泛开展，并在纵隔及肺门肿大淋巴结的诊断及鉴别诊断、肺癌的早期诊断和分期、

关键词：经支气管针吸活检术 transbronchial 疾病诊治呼吸系统肺门肿大淋巴结 needle 微生物学标本鉴别诊断

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影像引导下的内镜技术在肺外周结节诊断中的价值

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中华结核和呼吸杂志 2009年第11期32卷 810-811页

作者： Ko-pen Wang Chest Diagnostic Center Harbor Hospital Center JohnsHopkins University U S A

肺外周结节的确诊对患者进行何种治疗有着重要的影响，不仅能使肺癌患者得到及时治疗，而且也可阻止对良性疾病进行不必要的手术。因此选择何种方法诊断肺外周结节尤为重要。

关键词：肺外周结节内镜技术影像引导诊断肺癌患者良性疾病治疗

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Evolution of hydrocarbon generation of Jurassic source rock of the Lenke-1 well in Lenghu tectonic belt of Qaidam basin,China

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Mining Science and Technology 2009年第2期19卷 235-240页

作者： ZHU Yan-ming ZHANG Ming JIANG Bo pen De-hua YI Cheng-min ZENG Chun-lin WU Ying School of Resource and Geoscience China University of Mining ＆ Technology Xuzhou Jiangsu 221008 China Qinghai oilfield Company PetroChina Dunhuang Gansu 736202 China

The Lenghu tectonic belt is located at or near the northern margin in the Qaidam Basin,which is an intracontinental composite basin evolved during the Mesozoic and Cenozoic *** Lower Jurassic is considered a good source rock with a wide *** the deposit of the Lower Jurassic hydrocarbon source rock,the basin has undergone many tectonic events of subsidence and *** source rocks in the Lengke-1 well,have experienced a complicated tectonic-burial history during which different hydrocarbon generation(HG) evolutions have taken *** have investigated the history of burying,heating and hydrocarbon generation of the Lower Jurassic source rocks,not just on the basis of tectonic disturbance and deep burial,but also from new studies in fluid inclusion measurements and the application of numerical simulation with EASY%*** study reveals the evolution process,tectonic episodes and the strength of the HG of the Jurassic source *** conclude that twice HG processes have taken place since the Lower Jurassic formation and infer from that the important conclusion that more HG of the Lower Jurassic source rock took place during the Eocene-Miocene ***,we discuss the oil and gas tarp formation and destruction in the Lenghu tectonic belt and point out that more attention should be paid to the thrust faults,which formed during the late Himalayan epoch.

关键词： Lower Jurassic source rocks hydrocarbon generation EASY%Ro numerical simulation Lenghu tectonic belt

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