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PHOTOCATALyTIC PERFORMANCE OF PLASMA SPRAyED TiO_2-ZnFe_2O_4 COATINGS

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Acta Metallurgica Sinica(English Letters) 2005年第3期18卷 363-368页

作者： y.zeng J.T.Liu W.J.Qian J.H.Gao ShanghaiInstituteofCeramics TheChineseAcademyofSciencesShanghai200050China

A novel TiO2-ZnFe2O4 coating is prepared by plasma spraying. The effects of spra ying parameters and the composition of powders on the microstructure, surface mo rphology and photo-absorption of plasma sprayed coatings are studied. The photoc atalytic efficiency of the as-sprayed coatings is evaluated through the photo mi neralization of methylene blue. It was found that TiO2 coatings can decompose me thylene blue under the illumination of ultraviolet rays, and the degrading effic iency is improved with an increase in the content of FeTiO3 in the coatings. How ever, the presence of large amount of ZnFe2O4 compound will substantially lower the photocatalytic efficiency of the TiO2-ZnFe2O4 coatings for the unfavorable p hoto-excited electron-hole transfer process.

关键词： plasma spraying photocatalytic activity TiO2 ZnFe2O4

Improved mechanical properties and strengthening mechanism with the altered precipitate orientation in magnesium alloys

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Journal of Magnesium and Alloys 2022年第5期10卷 1256-1267页

作者： y.J.Wan y.zeng y.C.Dou D.C.Hu X.y.Qian Q.zeng K.X.Sun G.F.Quan Key Laboratory of Advanced Technologies of Materials Ministry of EducationSchool of Material Science and EngineeringSouthwest Jiaotong UniversityChengdu 610031China College of Materials Science and Engineering Sichuan University of Science and EngineeringZigong 643000China Department of Materials The University of ManchesterOxford RoadManchester M139PLUnited Kingdom

Aging prior to twinning deformation was proposed to alter the precipitate orientation of the plate-shapedβ-MgAlfrom(0002)basal planes(named basal plates)to■prismatic planes(named prismatic plates)in AZ31 Mg *** experimental results showed that the compressive yield strength(CyS)of the sample containing prismatic plates increased 40 MPa and the compression ratio raised by 22%compared to that containing basal *** underlying strengthening mechanism was analyzed via a yield strengthen(yS)model with a function of grain size,precipitate characters(size,oritention,fraction)and Schmid factor(SF).It revealed that the improvement of CyS was mainly attributed to the altered precipitate orientation and refined grain size produced by twinning ***,the prismatic plates always have a stronger hardening effect on basal slip than basal plates under the same varites of precipitate diameter and ***,the decreased CRSS ratio of prismatic slip to basal slip revealed that the activity of non-basal slip in Mg alloy might be *** activated slip systems provided more mobile dislocations,contributing to the large compression ratio of the Mg rolled sheet with prismatic plates.

关键词： Precipitate orientation Precipitation strengthening Grain boundary strengthening yield strength model

THEORETICAL CONSIDERATIONS OF SECONDARy ORGANIC AEROSOL FORMATION FROM H-ABSTRACTION REACTION OF P-XyLENE

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THEORETICAL CONSIDERATIONS OF SECONDARY ORGANIC AEROSOL FORM...

Future research needs for environmental science in China

中国化学会第27届学术年会

作者：胡淑贤 Eddy y.zeng State Key Laboratory of Organic Geochemistry Guangzhou Institute of GeochemistryChinese Academy of Sciences

＜正＞Xylenes are important constituents of many liquid fuels, as well as precursors of secondary organic aerosol （SOA）1-2. Theoretical calculations at the B3LyP/6-311++G**level using Gaussian 03 program

关键词： p-Xylene H-Abstraction Channel Theoretical Barrier

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Geography and Sustainability 2021年第3期2卷 234-242页

作者： Dongqiang Zhu Weiqiang Chen Xiaolei Qu yuming Zheng Jun Bi Haidong Kan yongming Luo Guangguo ying Eddy y.zeng Fangjie Zhao Lingyan Zhu yongguan Zhu Shu Tao School of Urban and Environmental Sciences Peking UniversityBeijing 100871China Key Lab of Urban Environment and Health Institute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China State Key Laboratory of Pollution Control and Resource Reuse School of the EnvironmentNanjing UniversityJiangsu 210023China Key Laboratory of Urban Pollutant Conversion Institute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China School of Public Health Key Lab of Public Health Safety of the Ministry of Education and Key Lab of Health Technology Assessment of the Ministry of HealthFudan UniversityShanghai 200433China Key Laboratory of Soil Environment and Pollution Remediation Institute of Soil ScienceChinese Academy of SciencesNanjing 210008China The Environmental Research Institute Ministry of Education Key Laboratory of Theoretical Chemistry of EnvironmentSouth China Normal UniversityGuangzhou 510006China Guangdong Key Laboratory of Environmental Pollution and Health School of EnvironmentJinan UniversityGuangzhou 511443China Jiangsu Key Laboratory for Organic Waste Utilization Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource UtilizationCollege of Resources and Environmental SciencesNanjing Agricultural UniversityNanjing 210095China Tianjin Key Laboratory of Remediation&Pollution Control for Urban Ecological Environment Key Laboratory of Pollution Processes and Environmental Criteria of Ministry of EducationCollege of Environmental Science and EngineeringNankai UniversityTianjin 300350China

Environmental science is an interdisciplinary science developed in the process of understanding and solving ecolog-ical and environmental *** order to tackle these problems,environmental science research is expected to reveal the source,behavior,fate,exposure,and risks of pollutants in the environment and develop potential solutions to control *** provides the scientific basis for decision-makers to establish environmental and economic poli-cies,and promote concerted efforts for the sustainable development of ***,we articulate the development patterns,challenges,and future research needs of environmental science in China based on literature review and expert panel *** science research has evolved significantly in the past decade with an increas-ing diversity of environmental pollutants and health impacts,new technologies and methods,deepening fusion of multiple disciplines,and emerging solutions for pollution *** future development relies on the advances in our knowledge on the fate and transport of pollutants,regional environmental processes,ecotoxicological effects,environmental exposure and health effects,environmental analysis and monitoring,source control and reduction,environmental remediation,as well as environmental risk *** each of these fields,we summarize the significant challenges and highlight the research demands for *** on the status quo of China’s environmen-tal science research and future needs,we provide recommendations to promote its future development,including encouraging innovation and interdisciplinary research,providing decision support for national needs,encouraging international collaboration,and improving collaboration mechanisms.

关键词： Environmental science China Challenges Opportunities Research needs

珠江三角洲典型有机污染物的环境行为及人群暴露风险

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化学进展 2017年第9期29卷 943-961页

作者：鲍恋君郭英刘良英曾永平暨南大学环境学院广州市环境暴露与健康重点实验室广东省环境污染与健康重点实验室广州510632

珠江三角洲是我国经济最为发达的地区之一,也是环境污染问题最为严峻的地区之一。严峻的环境污染问题毫无疑问地将影响地区经济的可持续发展与人体健康。大量的研究表明,多种传统和新型的有机污染物在珠江三角洲各类环境介质、生物体、... 详细信息

珠江三角洲是我国经济最为发达的地区之一,也是环境污染问题最为严峻的地区之一。严峻的环境污染问题毫无疑问地将影响地区经济的可持续发展与人体健康。大量的研究表明,多种传统和新型的有机污染物在珠江三角洲各类环境介质、生物体、甚至人体中广泛存在。这些污染物包括多溴联苯醚(PBDEs)、多氯联苯(PCBs)、有机氯农药(OCPs)、有机磷酸酯类阻燃剂(OPEs)等。系统研究污染物的环境行为及人体暴露风险具有重要的科学和现实意义,可以为政策制定者采取有效的污染物控制措施提供科学数据支持。有机污染物在环境界面(沉积物-水、大气-水及土壤-水)迁移是控制其地球化学行为的重要过程。本文综述了珠江三角洲典型有机污染物的宏观环境行为、微观的环境界面通量测定技术、人体暴露风险三个方面的研究历史及现状,并总结了现有研究的不足,展望了研究趋势。

关键词：有机污染物环境行为大气干湿沉降土壤储量河流通量人体暴露

通过渗透微泵稳定抑制小鼠血浆CD26/DPPIV分子酶活性的研究

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首都医科大学学报 2019年第3期40卷 424-428页

作者：薛兴奎韩新华蔡思齐陈晓玲 Melody y.zeng 深圳市龙华区人民医院中心实验室广东深圳518109 深圳市南山区蛇口人民医院内分泌科广东深圳518109 南方医科大学研究生院检验技术系广州501505

目的研究采用皮下植入渗透微泵给予西他列汀对小鼠体内CD26/DDPIV蛋白酶活性的作用效果与持续时间。方法将灌注西他列汀药物的渗透泵经手术植入BL6/C57小鼠皮下,通过高效液相色谱-质谱监测小鼠体内血液药物浓度,酶标法检测小鼠血浆DPPI... 详细信息

目的研究采用皮下植入渗透微泵给予西他列汀对小鼠体内CD26/DDPIV蛋白酶活性的作用效果与持续时间。方法将灌注西他列汀药物的渗透泵经手术植入BL6/C57小鼠皮下,通过高效液相色谱-质谱监测小鼠体内血液药物浓度,酶标法检测小鼠血浆DPPIV蛋白酶活性,流式细胞术观察小鼠脾T细胞CD26分子的表达,利用Transwell小室检测小鼠T细胞迁移能力。取渗透泵周围皮肤,病理切片检查小鼠皮下病理损害或炎性反应。结果B6/C57小鼠在植入渗透泵后,体内药物浓度比采用直接皮下注射法稳定,持续时间久,血浆DPPIV蛋白酶活性抑制程度与血药浓度明显相关。给药24 h后,小鼠脾T细胞CD26分子表达无明显变化,渗透泵组迁移能力较对照组明显降低。皮下植入渗透泵小鼠组饮食活动度无明显改变,皮肤病理检查未见炎性反应与病理损害。结论通过渗透泵给予小鼠药物能够保持西他列汀血药浓度稳定,持续抑制体内DPPIV活性,降低T细胞迁移能力,为CD26/DPPIV分子功能与免疫体内研究提供更方便有效的途径。

关键词： CD26/DPPIV分子西他列汀渗透泵 T细胞

基于实际生物动力学测量值为基础的甲状腺癌131I治疗辐射安全注意事项

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国际医学放射学杂志 2014年第6期 588-589页

作者： B.Liu W.Peng R.Huang R.Tian y.zeng A.Kuang 张会平 Department of Nuclear Medicine West China HospitalSichuan University

摘要目的通过实际的生物动力学测量,为甲状腺激素撤减所致甲状腺功能减退以及正在接受131I治疗甲状腺癌病人制定辐射预防措施。材料与方法该研究获知情同意并经

关键词：甲状腺癌病人生物动力学消融治疗

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CD26基因敲除小鼠异基因骨髓移植的研究

海南医学 2019年第10期30卷 1230-1233页

作者：薛兴奎韩新华蔡思齐陈晓玲 Melody y.zeng 深圳市龙华区人民医院中心实验室广东深圳518109 深圳市南山区蛇口人民医院内分泌科广东深圳518109 南方医科大学研究生院广东广州501505

目的研究CD26基因敲除对建立异基因骨髓移植模型的影响。方法分别提取CD26基因敲除C57BL/6小鼠(CD26^(-/-))骨髓细胞和脾T细胞,输注经过900 cGy剂量照射的BALB/C小鼠,进行异基因小鼠骨髓移植。根据回输的细胞不同分为骨髓细胞组(BM组)... 详细信息

目的研究CD26基因敲除对建立异基因骨髓移植模型的影响。方法分别提取CD26基因敲除C57BL/6小鼠(CD26^(-/-))骨髓细胞和脾T细胞,输注经过900 cGy剂量照射的BALB/C小鼠,进行异基因小鼠骨髓移植。根据回输的细胞不同分为骨髓细胞组(BM组)、小鼠骨髓加脾脏T细胞组(BM+SP组)。采用流式细胞术检测异基因小鼠移植的嵌合体。移植后监测小鼠体质量、活动度、弓背情况、毛发等,统计移植物抗宿主病(GVHD)指数。取小鼠肝脏、皮肤、肠道组织,制备病理切片,镜下观察病理变化。结果敲除CD26的造血干细胞顺利植入受者小鼠体内,BM组、BM+SP组在第8周嵌合率[(71.16±7.34)%vs (66.72±6.02)%]比较差异无统计学意义(P>0.05);植入的供者造血干细胞能在受者体内引起GVHD的发生,在移植后第35天,BM组、BM+SP组小鼠体质量分别平均下降2.2%与28.5%,GVHD分数分别为0.30±0.44与5.2±1.01,差异均有统计学意义(P<0.05);提取小鼠肝脏、皮肤、肠道组织,病理切片评估,结果显示,BM组和BM+SP组均有明显的病理损害,提示有GVHD的发生。结论 CD26基因敲除小鼠造血干细胞能够顺利植入受者小鼠并构建异基因骨髓移植模型,导致GVHD发病,为研究CD26在异基因骨髓移植中的作用机制提供有效方法。

关键词： CD26 移植物抗宿主疾病异基因骨髓移植嵌合体基因敲除

Copper-catalyzed C–H bond functionalization enabled by programmed alternating current

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Science China Chemistry 2025年第1期68卷 10-11页

作者： Zhoumei Tan Kun Xu Chengchu zeng Beijing Key Laboratory of Environmental and Viral Oncology College of Chemistry and Life ScienceBeijing University of TechnologyBeijing 100124China

Synthetic electrochemistry has been selected as one of the Top Ten Emerging Technologies in Chemistry in 2023 by International Union of Pure and Applied Chemistry(IUPAC)^([1]).It has emerged as a sustainable platform for organic synthesis and has exhibited a wide range of applications from academia to industry^([2]).However,electrosynthesis has been predominantly performed by using direct current(DC).

关键词： catalyzed Copper IUPAC