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Modulated hydrocarbon distribution of gasoline deriving from butene conversion in the presence of syngas

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Journal of Energy Chemistry 2022年第10期31卷 416-421,I0010页

作者： Yi Ding Feng Jiao xiulian Pan Xinhe Bao Department of Chemical Physics University of Science and Technology of ChinaHefei 230026AnhuiChina State Key Laboratory of Catalysis Dalian National Laboratory for Clean Energy2011-Collaborative Innovation Center of Chemistry for Energy MaterialsDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina University of Chinese Academy of Sciences Beijing 100049China

With the expansion of butene production capacity,clean and efficient conversion of mixed butene attracts increasing *** we report direct co-conversion of butene and syngas to highquality gasoline enabled by a bifunctional OXZEO catalyst comprising ZnCrO_(x) oxide and ZSM-5 zeolite.A gasoline selectivity of 71.6% at 98.1% butene conversion and 26.2% CO conversion have been obtained under the reaction conditions of 360℃,3 MPa and 3000 mL g^(-1) h^(-1).The space time yield of gasoline of0.25 g·g^(-1) h^(-1) is ***,the presence of syngas can effectively facilitate iso-paraffin production while hindering the formation of *** is attributed to the prohibited hydrogen transfer aromatization process of butene on ZSM-5 in the presence of *** rthermore,the formation of isomers of gasoline range hydrocarbons is favored because the active intermediates generated from CO/H_(2) activation over ZnCrO_(x) oxide could react with butene over ZSM-5 ***,the product distribution among gasoline range hydrocarbons is modulated with reduced heavy aromatics and improved iso-paraffins,which is desirable for application as *** provides an alternative environmentally friendly technology to utilize still increasing mixed butene.

关键词： Butene utilization Bifunctional catalysts OXZEO Syngas conversion Gasoline

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食用盐中碘含量监测结果研究

中国卫生产业 2024年第1期21卷 208-211页

作者：王燕高曼张秀莲邹平市疾病预防控制中心检验科山东邹平256200

目的分析邹平市儿童和孕妇食用盐中的碘含量情况,为相关疾病提供参考。方法选择2018—2022年邹平市儿童尿碘检测样本1987份,孕妇尿碘检测样本1903份,儿童食用的盐碘检测样本1032份,以及孕妇食用的盐碘检测样本1428份作为研究对象展开分... 详细信息

目的分析邹平市儿童和孕妇食用盐中的碘含量情况,为相关疾病提供参考。方法选择2018—2022年邹平市儿童尿碘检测样本1987份,孕妇尿碘检测样本1903份,儿童食用的盐碘检测样本1032份,以及孕妇食用的盐碘检测样本1428份作为研究对象展开分析,并统计相关的监测结果。结果2018—2022年儿童尿碘整体适宜量占比较高(29.59%),2022年儿童尿碘过量占比最高。2018—2022年孕妇整体尿碘不足占比最高,其中以2020年、2021年较为突出。2018—2022年儿童整体碘盐合格率为84.98%,碘盐覆盖率为89.05%。2022年碘盐覆盖率较低(82.35%)。2018—2022年孕妇整体碘盐合格率为85.26%,碘盐覆盖率为90.27%。2022年的孕妇碘盐覆盖率较低(86.42%)。各地区孕妇碘盐覆盖率均≥80%,整体水平较高。结论邹平各地区儿童和孕妇碘盐覆盖率占比高达80%以上,虽然儿童尿碘整体适宜量占比较高,但孕妇摄入量偏低,还需相关部门及时正确地指导、调整饮食中的碘摄入量,进而降低由于碘缺乏而引起的疾病发生率。

关键词：食用盐碘盐碘含量尿碘监测

Spectral method for multidimensional Volterra integral equation with regular kernel

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Frontiers of Mathematics in China 2019年第2期14卷 435-448页

作者： Yunxia WEI Yanping CHEN xiulian SHI Yuanyuan ZHANG Zhejiang University of Water Resources and Electric Power Hangzhou 310018 China School of Mat hematical Sciences South China Normal University Guangzhou 510631 China School of Mat hematics and Statist ics Zhaoqing University Zhaoqing 526061 China Department of hematics and Information Science Yantai University Yantai 264005 China

This paper is concerned with obtaining an approximate solution for a linear multidimensional Volterra integral equation with a regular kernel. We choose the Gauss points associated with the multidimensional Jacobi weight function ω(x)=∏di=1(1-xi)^α(1+xi)^β,-1<α,β<1/d-1/2 (d denotes the space dimensions) as the collocation points. We demonstrate that the errors of approxima te solution decay exponentially. Numerical results are presen ted to demonstrate the effectiveness of the Jacobi spectral collocation method.

关键词： Multidimensional Volterra integral equation Jacobi collocation discretization: multidimensional Gauss quadrature formula

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不同楸树品种对茎腐病的抗性差异研究

南京林业大学学报（自然科学版） 2024年第2期48卷 155-165页

作者：祝艳艳贾瑞瑞付钰常林岳远征杨秀莲王良桂南京林业大学风景院林学院江苏省风景园林重点实验室江苏南京210037

【目的】探究不同品种和不同繁殖方式楸树(Catalpa bungei)苗对烟草疫霉(Phytophthora nicotianae)(菌株QS.1)侵染的抗性差异,为楸树引种栽培、抗病育种提供依据。【方法】以‘洛楸1号’组培苗(LQ-Z)、‘金丝楸’(JSQ)、‘楸杂1号’(QZ... 详细信息

【目的】探究不同品种和不同繁殖方式楸树(Catalpa bungei)苗对烟草疫霉(Phytophthora nicotianae)(菌株QS.1)侵染的抗性差异,为楸树引种栽培、抗病育种提供依据。【方法】以‘洛楸1号’组培苗(LQ-Z)、‘金丝楸’(JSQ)、‘楸杂1号’(QZ)、‘豫楸1号’(YQ)的1年生组培苗,以及‘洛楸1号’扦插苗(LQ-Q)、‘楸树5-8’(Q5-8)、‘楸树8-1’(Q8-1)的1年生扦插苗,6个生产上推广的楸树品种为试验材料,用烟草疫霉(菌株QS.1)进行侵染,测定楸树相关渗透物质含量、保护酶活性和光合气体参数等变化,分析不同处理楸树幼苗感染烟草疫霉(菌株QS.1)后的生理指标变化。【结果】菌株QS.1侵染后2~4 d,供试的各楸树品种均感病。楸树品种组培苗中,‘楸杂1号’和‘豫楸1号’对菌株QS.1侵染的抗性最弱,‘金丝楸’的抗病力最强;楸树品种扦插苗中,‘楸树5-8’和‘楸树8-1’对菌株QS.1侵染抗性较强;‘洛楸1号’扦插苗抗病性大于组培苗,除‘金丝楸’外,楸树品种的扦插苗较组培苗具有更高的抗性。【结论】不同楸树品种在接菌后感染致病存在差异,不同楸树品种的抗烟草疫霉(菌株QS.1)致病能力与光合性能的维持及防御相关酶活性的调节有关。

关键词：楸树品种烟草疫霉(菌株QS.1) 抗性差异生理指标繁殖方式

Cis-regulatory decoy disrupts autorepression:a potential escape-resistant anti-viral therapy

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Signal Transduction and Targeted Therapy 2022年第10期7卷 3635-3636页

作者： Jia Hu Yuanqin Min xiulian Sun Wuhan Institute of Virology Chinese Academy of SciencesCenter for Biosafety Mega-ScienceWuhan430071China

In a recent paper,Chaturvedi et *** a study in Cell reporting that the artificially synthesized nucleic acid decoys would disrupt the autorepression,which can generate antiviral agents with a high barrier to the evolu... 详细信息

关键词： decoy potential resistance

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氨纶产品定量化学分析效率优化的探讨

中国纤检 2024年第6期 76-79页

作者：吴秀莲张香俊雷英眉山市纤维检验所四川眉山620036

含氨纶的产品面料,成分含量定量化学分析为实验室检验检测常做项目,本文以优化提高试验效率为目的,从氨纶二组分中标准的最佳选择、三组分中最佳方案的选择、三组分中不溶组分聚酯纤维在相应试剂盐酸中的质量损失修正系数、氨纶残留物... 详细信息

含氨纶的产品面料,成分含量定量化学分析为实验室检验检测常做项目,本文以优化提高试验效率为目的,从氨纶二组分中标准的最佳选择、三组分中最佳方案的选择、三组分中不溶组分聚酯纤维在相应试剂盐酸中的质量损失修正系数、氨纶残留物烘样时间长短4个方面,探讨分析氨纶产品定量化学分析试验效率的优化选择,以此为实验室提供参考帮助。

关键词：氨纶定量化学分析标准方案质量损失修正系数烘样时间

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Effect of SiC whiskers on the oxidation protective properties of SiC coatings for carbon/carbon composites

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Rare Metals 2006年第1期25卷 58-62页

作者： SHI Xiaohong LI Hejun FU Qiangang LI Kezhi ZHANG xiulian The Key Laboratory of Superhigh Temperature Composites Northwestern Polytechnical University Xi＇an 710072 China

In order to effectively employ the unique high temperature mechanical properties of carbon/carbon composite substrates, SiC coatings reinforced by SiC whiskers were prepared by pack cementation method. The effect of SiC whiskers on the oxidation resistance properties of the single-layer coating and double-layer coating was investigated. SiC whiskers in the single-layer SiC coating have little effect on the anti-oxidation property but obviously improve the thermal shock property. The double-layer coating with inner-layer reinforced coating exhibits more perfect anti-oxidation ability than the double-layer coating with SiC inner-layer coating.

关键词： carbon/carbon composites SiC coating oxidation protection SiC whiskers

Understanding nano effects in catalysis

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National Science Review 2015年第2期2卷 183-201页

作者： Fan Yang Dehui Deng xiulian Pan Qiang Fu Xinhe Bao State Key Laboratory of Catalysis iChEM(Collaborative Innovation Center of Chemistry for Energy Materials)Dalian Institute of Chemical PhysicsChinese Academy of Sciences

Catalysis, as a key and enabling technology, plays an increasingly important role in ields ranging from energy, environment and agriculture to health care. Rational design and synthesis of highly eicient catalysts has become the ultimate goal of catalysis research. hanks to the rapid development of nanoscience and nanotechnology, and in particular a theoretical understanding of the tuning of electronic structure in nanoscale systems, this element of design is becoming possible via precise control of nanoparticles' composition, morphology, structure and electronic states. At the same time, it is important to develop tools for in situ characterization of nanocatalysts under realistic reaction conditions, and for monitoring the dynamics of catalysis with high spatial, temporal and energy resolution. In this review, we discuss coninement efects in nanocatalysis, a concept that our group has put forward and developed over several years. Taking the conined catalytic systems of carbon nanotubes, metal-conined nano-oxides and 2D layered nanocatalysts as examples, we summarize and analyze the fundamental concepts, the research methods and some of the key scientiic issues involved in nanocatalysis. Moreover, we present a perspective on the challenges and opportunities in future research on nanocatalysis from the aspects of:(1) controlled synthesis of nanocatalysts and rational design of catalytically active centers;(2) in situ characterization of nanocatalysts and dynamics of catalytic processes;(3) computational chemistry with a complexity approximating that of experiments; and (4) scale-up and commercialization of nanocatalysts.

关键词： nanocatalysis coninement carbon nanotubes graphene 2D materials inverse catalysts computational chemistry in situ characterizati

Research on Diageneses of Cambrian Shoal Facies Carbonate Rocks in the Xiadong Area, Hubei Province

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Acta Geologica Sinica(English Edition) 2001年第2期75卷 161-174页

作者： ZHANG xiulian and JIANG Lingzhi Department of Geology, Peking University, Beijing 100871 Peking Univ Dept Geol Beijing 100871 Peoples R China

With continuous outcrops, developed shoal facies rocks, complete types of diagenesis and changeable diagenetic environments, Cambrian strata are well developed in the Xiadong area, Yichang, Hubei Province. Under the combined influence of numerous diageneses, secondary pores can be formed, which result in better reservoir properties of the rock strata.

关键词： diagenesis diagenetic facies interval diagenetic stage diagenetic environment