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Geochemistry and Petrogenesis of Volcanic Rocks from the Continent-Ocean Transition Zone in Northern South China Sea and Their Tectonic Implications

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Journal of Ocean University of China 2020年第5期19卷 1051-1061页

作者： XU Yue YANG Yaoming YU Hongjun GAO Wei GAO Xiangxing LIU Baohua TIAN Xu YANG Jichao zhang wenquan Deep Sea Interdisciplinary Center Qingdao National Laboratory for Marine Science and TechnologyQingdao 266061China National Deep Sea Center Ministry of Natural ResourcesQingdao 266237China College of Marine Geosciences Ocean University of ChinaQingdao 266100China

Miocene–Pliocene(22–5 Myr) volcanism and associated seamounts are abundant in the continent-ocean transition(COT) zone in the margin of the north South China Sea(SCS). The petrogenesis of volcanic rocks from these seamounts and regional tectonic evolution of COT zone are poorly known. In this paper, we obtained whole-rock major and trace element compositions and Sr-Nd-Pb isotopic data for these volcanic rocks from the Puyuan and Beipo seamounts within COT zone, in northeastern SCS. Based on the geochemical analyses, the volcanic rocks are classified as alkaline ocean island basalts(OIB) and enriched mid-ocean ridge basalts(E-MORB). The OIBs from the Puyuan seamount are alkaline trachybasalts and tephrites that show enrichment of the light rare earth elements(LREE) relative to heavy rare earth elements(HREE) and more radiogenic Sr-Nd isotopic compositions, and have significant ‘Dupal isotopic anomaly'. In contrast, the E-MORBs from the Beipo seamount are tholeiitic basalts that have less enrichment in LREE and less radiogenic Sr-Nd isotopic compositions than the counterparts from the Puyuan seamount. Petrological and geochemical differences between the OIBs and MORBs from these two seamounts can be explained by different mantle sources and tectonic evolution stages of the COT zone. Syn-spreading OIB type basalts from the Puyuan seamount were derived from an isotopically ‘enriched', and garnet facies-dominated pyroxenitic mantle transferred by the Hainan mantle plume. In contrast, post-spreading E-MORB type basalts from the Beipo seamount are considered to be derived from the melting of isotopically ‘depleted' pyroxenite mantle triggered by lithosphere bending and subsequent post-rifting at the lower continental slope of the northern margin.

关键词： volcanic rocks geochemistry tectonic evolution South China Sea continent-ocean transition zone

Investigation of Sintering Technology for Composite of Stainless Steel and Partially Stabilized Zirconia

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Journal of Materials Science & Technology 2002年第1期18卷 10-12页

作者： wenquan zhang, Jianxin XIE, Changjing zhang and Zhiguo YANGSchool of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China [ Manuscript received September 4, 2000, in revised form April 13, 2001] Sch. of Mat. Sci. and Eng. Univ. of Sci. and Technol. Beijing Beijing 100083 China

The sintering technology for mixed powdered extrusion rods of different proportions of stainless steel to magnesia partially stabilized zirconia (PSZ) was investigated. The effects of some sintering parameters including holding time, atmosphere and protective gas pressure on shrinkage, relative density, microstructure, micro-Vickers hardness and compression strength of sintered samples were mainly researched. The experimental results are as follows: (1) The shrinkage and the relative density of the sintered samples decrease as increasing stainless steel content in the composite, except for the case containing 90 percent of stainless steel; (2) The porosity in PSZ matrix rises as increasing the stainless steel content in the composite; (3) Longer sintering holding time, higher sintering vacuum and gas-pressure sintering process not only enhance the relative density, but also improve microstructure of composite; (4) Micro-Vickers hardness of PSZ matrix decreases as increasing stainless steel content, while that of stainless steel particles in sintered samples varies unnoticeably.

关键词： PSZ Stainless steel Composite Sintering technology

Corrosion Behavior of Pre-oxidized GH4169 Alloy with Solid NaCI Deposited in a Wet Oxygen Flow at 600 ℃

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Acta Metallurgica Sinica(English Letters) 2024年第7期37卷 1249-1264页

作者： Weidong zhang Yu Cui Li Liu wenquan Wang Wenzheng Chen Rui Li Fuhui Wang Shenyang National Laboratory for Materials Science Northeastern UniversityShenyang110819China Shi-Changxu Innovation Center for Advanced Materials Institute of Metal ResearchChinese Academy of SciencesShenyang110016China

The corrosion behavior of the pre-oxidized GH4169 alloy was studied after 20 h of exposure under a solid NaCl deposit film in a wet O_(2) environment at 600℃ by mass-gain measurements,X-ray diffraction,scanning electron microscopy,transmission electron microscopy *** results indicate that the pre-oxidized GH4169 alloy undergoes serious corrosion in the corrosive *** preformed Cr_(2)O_(3) layer is gradually destroyed by deposit NaCl,and the inner Nb2O5 layer beneath the complete outer Cr_(2)O_(3) layer also reacts with NaCl to form NaNbO_(3).The electrochemical test results testified the existence of electrochemical reactions during this corrosion *** corrosion behavior of pre-oxidized GH4169 under a solid NaCl deposit film in a wet O_(2) environment at 600℃has been discussed in detail.

关键词： Pre-oxidation Solid NaCl Wet O2 Electrochemical corrosion

胆囊癌组织中Kindlin-1和Myc诱导核抗原53与临床病理特征的关系

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上海医学 2024年第5期47卷 284-288页

作者：樊鸿炎张文权杜宏伟丁光荣达德丽兰州市第二人民医院消化科甘肃兰州730046 兰州市第二人民医院普外科甘肃兰州730046

目的探究黏着斑蛋白Kindlin-1和Myc诱导核抗原53(Mina53)在胆囊癌与癌旁正常组织中的表达差异,及其与临床病理特征的关系。方法选取2016年10月—2020年4月间于兰州市第二人民医院普通外科行手术切除的胆囊癌患者的标本52例,选取癌旁组... 详细信息

目的探究黏着斑蛋白Kindlin-1和Myc诱导核抗原53(Mina53)在胆囊癌与癌旁正常组织中的表达差异,及其与临床病理特征的关系。方法选取2016年10月—2020年4月间于兰州市第二人民医院普通外科行手术切除的胆囊癌患者的标本52例,选取癌旁组织标本32例作为对照组。采用免疫组织化学法检测胆囊癌和癌旁组织中Kindlin-1、Mina53的表达。组间比较采用pearson卡方检验和Fisher确切概率法。采用Kaplan-Meier单因素生存分析Kindlin-1、Mina53阳性和胆囊癌患者生存期的关系。结果Kindlin-1和Mina53在癌组织中的阳性表达率均显著高于癌旁组织(P<0.001、0.05)。Kindlin-1、Mina53的阳性率均与肿瘤的浸润深度、分化程度、TNM分期,以及淋巴结转移、肝脏转移、神经侵犯、脉管侵犯呈正相关(P值均<0.05)。Kaplan-Meier生存分析结果显示,Kindlin-1、Mina53阳性的患者生存期均分别显著短于阴性患者(P值均<0.05)。结论Kindlin-1、Mina53在胆囊癌组织中呈高表达,且和癌组织分化程度、淋巴结转移呈正相关,其阳性表达可作为胆囊癌在临床上诊断治疗的参考指标。

关键词：黏着斑蛋白 Myc诱导核抗原胆囊癌免疫组织化学

A review on electrocatalytic CO_(2) conversion via C-C and C-N coupling

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Carbon Energy 2024年第2期6卷 167-194页

作者： Zhuangzhi zhang Sijun Li Zheng zhang Zhou Chen Hua Wang Xianguang Meng wenquan Cui Xiwei Qi Jiacheng Wang Hebei Provincial Laboratory of Inorganic Nonmetallic Materials College of Materials Science and EngineeringNorth China University of Science and TechnologyTangshanChina Key Laboratory of Luminescence Analysis and Molecular Sensing Ministry of EducationCollege of Chemistry and Chemical EngineeringSouthwest UniversityChongqingChina State Key Laboratory of New Textile Materials and Advanced Processing Technologies Hubei Key Laboratory of Biomass Fibers and Eco-Dyeing and FinishingCollege of Chemistry and Chemical EngineeringWuhan Textile UniversityWuhanChina College of Materials Xiamen UniversityXiamenChina Hebei Iron and Steel Laboratory TangshanChina Hebei Key Laboratory for Environment Photocatalytic and Electrocatalytic Materials College of Chemical EngineeringNorth China University of Science and TechnologyTangshanChina College of Metallurgy and Energy North China University of Science and TechnologyTangshanChina State Key Laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of CeramicsChinese Academy of SciencesShanghaiChina Institute of Electrochemistry School of Materials Science and EngineeringTaizhou UniversityTaizhouChina

Electrochemical C-C and C-N coupling reactions with the conversion of abundant and inexpensive small molecules,such as CO_(2) and nitrogencontaining species,are considered a promising route for increasing the value of CO_(2) reduction *** development of high-performance catalysts is the key to the both electrocatalytic *** this review,we present a systematic summary of the reaction systems for electrocatalytic CO_(2) reduction,along with the coupling mechanisms of C-C and C-N bonds over outstanding electrocatalytic materials recently *** key intermediate species and reaction pathways related to the coupling as well as the catalyst-structure relationship will be also discussed,aiming to provide insights and guidance for designing efficient CO_(2) reduction systems.

关键词： C-C coupling C-N coupling CO_(2) conversion electrocatalysis urea synthesis

Research on Chinese Employees'Organizational Commitments

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Social Sciences in China 2002年第3期23卷 59-67页

作者： Ling wenquan, Fang Liluo zhang Zhican

本研究首先在访谈、项目收集、多次预试和科学检验的基础上,研制了一套“中国职工组织承诺问卷”。采用多元统计解析方法中的因素分析,探讨了中国企业职工组织承诺的心理结构,提出了五因素模型。这五种基本的承诺类型是:感情承诺、规范... 详细信息

本研究首先在访谈、项目收集、多次预试和科学检验的基础上,研制了一套“中国职工组织承诺问卷”。采用多元统计解析方法中的因素分析,探讨了中国企业职工组织承诺的心理结构,提出了五因素模型。这五种基本的承诺类型是:感情承诺、规范承诺、理想承诺、经济承诺和机会承诺。在此基础上,采用相关分析、交叉分析等方法,探讨了我国不同组织承诺类型职工的工作行为表现。最后,采用单因素方差分析、多重比较检验、交叉分析及结构方程模型中的路径分析方法探讨了影响我国职工组织承诺的因素模型,从而为正确处理我国员工与企业(组织)的关系,改进人事管理,提供了理论依据和科学方法。

关键词：科学检验组织承诺因素模型承诺类型交叉分析多元统计因素分析解析方法相关分析结构方程模型

Mesoporous amorphous FeOOH-encapsulated BiO_(2–x) photocatalyst with harnessing broad spectrum toward activation of persulfate for tetracycline degradation

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Chinese Journal of Chemical Engineering 2024年第7期71卷 235-248页

作者： Pengfei Wu Zhaolong Liu Li Wu Yingkun zhang Bing Wang zhanghao Cheng wenquan Cui Xiangyang Lv Qingling Liu Tianjin Key Laboratory of Indoor Air Environmental Quality Control School of Environmental Science and EngineeringTianjin UniversityTianjin 300350China Hebei Pollution Control Technology Innovation Center of Steel and Coking Industry Department of Environmental and Chemical EngineeringHebei College of Industry and TechnologyShijiazhuang 050091China Hebei Key Laboratory of Environmental Photocatalytic and Electrocatalytic Materials College of Chemical EngineeringNorth China University of Science and TechnologyTangshan 063210China Hebei Academy of Product Quality Supervision&Inspection Shijiazhuang 050227China

With the growing concern about the water environment,the advanced oxidation process of persulfate activation assisted by photocatalysis has attracted considerable attention to decompose dissolved organic *** this work,to overcome the drawbacks of the photocatalytic activity reduction caused by the photo-corrosion of non-stoichiometric BiO_(2–x),a novel material with amorphous FeOOH in situ grown on layered BiO_(2–x) to form a core-shell structure similar to popcorn chicken-like morphology was produced in two simple and environmentally beneficial *** a series of degradation activity tests of hybrid materials under different conditions,the as-prepared materials exhibited remarkable degradation activity and stability toward tetracycline in the FeOOH@BiO_(2–x)/Vis/PS system due to the synergism of photocatalysis and persulfate *** results of XRD,SEM,TEM,XPS,FTIR,and BET show that the loading of FeOOH increases the specific surface area and active sites appreciably;the heterogeneous structure formed by FeOOH and BiO_(2–x) is more favorable to the effective separation of photogenerated *** optimal degradation conditions were at a catalyst addition of 0.7 g·L^(–1),a persulfate concentration of 1.0 g·L^(–1),and an initial pH of 4.5,at which the degradation rate could reach 94.7%after 90 *** influence of typical inorganic anions on degradation was also *** studies and radical quenching experiments revealed that·OH,SO_(4)^(-)·,and·O_(2)^(-)were the principal active species generated during the degradation of *** results of the 1,10-phenanthroline approach proved that the effect of dissolved iron ions on the tetracycline degradation was limited,and the interfacial reaction that occurs on the active sites on the material's surface was a critical *** work provides a novel method for producing efficient broad-spectrum Bismuth-based composite photocatalysts and photocatalytic-activated persulfate synerg

关键词： Amorphous FeOOH BiO_(2–x) Activated persulfate Photocatalytic Tetracycline degradation

细胞存活率的检测处理方式对药物效果评估的影响研究

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计量科学与技术 2024年第4期68卷 60-65,44页

作者：杨璐璐龚晓云曾庆黎张文权申屠旭萍薛志超中国计量大学杭州322002 中国计量科学研究院北京100029

在使用体外培养的细胞进行药物实验时,药物处理会造成细胞死亡,而检测细胞存活率的方法不同,会对实验结果造成影响。以海拉细胞作为实验对象,用不同浓度的顺铂处理细胞,做去除以及不去除旧培养基的处理,比较包含或不包含旧培养基中漂浮... 详细信息

在使用体外培养的细胞进行药物实验时,药物处理会造成细胞死亡,而检测细胞存活率的方法不同,会对实验结果造成影响。以海拉细胞作为实验对象,用不同浓度的顺铂处理细胞,做去除以及不去除旧培养基的处理,比较包含或不包含旧培养基中漂浮细胞情况下检测得到的细胞存活率。实验结果显示,使用CCK8法检测96孔板、24孔板细胞存活率,不去除旧培养基时实验组细胞存活率高于去除旧培养基实验组细胞存活率。在顺铂浓度为0.625μM时,不去除旧培养基与去除旧培养基实验组之间的细胞存活率有显著差异。在6孔板和100mm培养皿中,使用细胞计数仪对用药后的细胞培养基中的漂浮细胞进行检测,发现培养基中漂浮的细胞中存在活细胞。结果表明药物处理后的培养基中存在漂浮的活细胞,去除旧培养基会去除这部分活细胞,从而影响细胞药物实验结果的准确性。

关键词：计量学细胞计量检测方法细胞活率药物效果体外培养

Factors contributing to the oxygen concentration over the Qinghai-Tibetan Plateau and its contribution rate calculation

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Science China Earth Sciences 2024年第2期67卷 497-509页

作者： Peijun SHI Ying zhang Yanqiang CHEN wenquan ZHU Xiaokang HU Heyi YANG Lu JIANG Yonggui MA Haiping TANG State Key Laboratory of Earth Surface Processes and Resource Ecology Beijing Normal UniversityBeijing100875China Key Laboratory of Environmental Change and Natural Disaster Ministry of EducationBeijing Normal UniversityBeijing100875China The Institute for Disaster Management and Reconstruction Sichuan UniversityChengdu610065China Academy of Plateau Science and Sustainability People’s Government of Qinghai Province&Beijing Normal UniversityXining810016China

A decline in atmospheric oxygen concentration is projected in the 21st century given the background of global *** Qinghai-Tibetan Plateau is located at a high altitude,and thus,it faces a hypoxia challenge;however,knowledge of the factors contributing to its atmospheric oxygen concentration is still ***,we conducted joint observations of ecosystem oxygen production and carbon sinks and near-surface atmospheric oxygen concentrations on the Qinghai-Tibetan Plateau and meteorological elements at Beijing Fangshan *** seasonal differences and statistical methods,we calculated the relative contribution rates of vegetation to changes in atmospheric oxygen *** results indicate that solar radiation,atmospheric humidity,and ecosystem oxygen consumption and production have a significant impact on the atmospheric oxygen concentration,and the impact shows temporal and spatial *** significantly impacts the oxygen concentration,with a contribution rate of 16.7%–24.5%,which is underestimated in existing *** findings provide important insights into the factors that influence atmospheric oxygen concentration and highlight the contribution of *** better understand the oxygen dynamics of the Qinghai-Tibetan Plateau,we recommend further field observations of soil respiration and vegetation photosynthesis to clarify the contributions of carbon storage,carbon sinks and other factors to the near-surface atmospheric oxygen concentration.

关键词： Qinghai-Tibetan Plateau Oxygen concentration Relative contribution rate Air temperature Vegetation