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Chinese Chemical Letters 2018年第3期29卷 471-474页

作者： Hui Wang Xiaopeng Lv Lingqiang Meng xiaofang wei Ying Wang Pengfei Wang Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education College of Chemistry & Materials Science Northwest University Xi'an 710127 China Key Laboratory of Photochemical Conversion and Optoelectrontc Materials Technical Institute of Physics and Chemistry Chinese Academy of Sciences Beijing 100190 China Institute of Functional Nano and Soft Materials Soochow University Suzhou 215123 China

2,7-Di（9,9-dimethyl-9H-fluoren-l-yl）-9H-thioxanthen-9-one （DMBFTX） with thermally activated delayed fluorescence （TADF） was well designed and synthesized. The phosphorescent organic lightemitting device （PHOLED） based on this novel TADF host material displays a stable red phosphorescence region, a peak external quantum efficiency （EQE） value of 12.9% and a low EQE roll-off of 38.8%at a luminance of 10000 cd/m2, which is benefited from the reverse intersystem crossing （RISC） of TADF host and less populated triplet exitons. Notably, the red device based on the TADF host DMBFrX exhibits superior electroluminescence performance and reduced efficiency roll-offcompared with the one hosted by commercially available host 1,3-bis（9-carbazolyl）benzene （mCP）, illustrating the high potential of employing the TADF host material with small energy gap to reduce efficiency roll-off in PHOLED.

关键词： Low efficiency roll-off Thermally activated delayed fluorescence Small energy gap Reverse intersystem crossing Phosphorescent OLEDs

Optically tunable fluorescent carbon nanoparticles and their application in fluorometric sensing of copper ions

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Nano Research 2019年第10期12卷 2576-2583页

作者： Minhuan Lan Shaojing Zhao Shuilin Wu xiaofang wei Yanzhao Fu Juanjuan Wu Pengfei Wang Wenjun Zhang Center of Super-Diamond and Advanced Films(COSDAF)and Department of Materials Science and Engineering City University of Hong KongHongKong SARChina Key Laboratory of Hunan Province for Water Environment and Agriculture Product Safety College of Chemistry and Chemical EngineeringCentral South UniversityChangsha 410083China Key Laboratory of Photochemical Conversion and Optoelectronic Materials Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion School of Chemistry and Chemical EngineeringTianjin University oj TechnologyTianjin 300384China

A series of carb on nano particles(CNPs)with emissi on wavele ngth ranging from 483 to 525 nm were prepared by hydrothermal treatme nt of poly-3-thiopheneacetic acid(PTA)and *** emission wavelength and surface oxidation degree of CNPs were shown to be controllable by simply adjusti ng NaOH *** CNPs prese nted obvious fluoresce nee spectral response toward copper ions(Cu^2+)through static quenching caused synergistically by electron transfer and inner filter *** O-and S-containing groups on the surface of CNPs were dem on strated to be resp on sible for their outsta nding sensing performa *** on that,a CN Ps-based ratiometric fluoresce nt probe for Cu^2+with a high fluoresce nee quenching rate constant of 1.4×10^5 L/mol and a short resp onse time(10 s)was *** practical applications in detecting Cu^2+in pond water and living cells were also dem on strated.

关键词： carbon nano particles tun able fluorometric copper ions

The study on exploitation potential of original low-oil-saturation reservoirs

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Petroleum Research 2020年第1期5卷 52-58页

作者： Sun Yingying Zhang Shanyan wei xiaofang Sang Guoqiang Minghui Zhou Huang Jia Yang Jiru State Key Laboratory of Enhanced Oil Recovery Beijing100083China

It is preliminary estimated that the proved geological reserves of original low-oil-saturation reservoirs(OLOSRs)of 54 blocks in China are more than 820 million *** same as the high water-cut stage of a reservoir after water flooding,the initial water cut of OLOSRS is higher than 80%.The industrial application of EOR technology could efficiently enhance oil recovery rate from 8.4% to 20.1% of reservoirs after water *** suitable measurements of EOR to the OLOSRs probably have a profound impact on achieving higher oilfield reserves and *** this paper,the main characteristics and reserves potential of OLOSRs have been studied by investigations and laboratory *** relationship between initial oil saturation and displacement efficiency is also *** feasibility of EOR technologies for different OLOSRs is *** results show that the OLOSRs could be divided into two categories(primary and secondary)by origin of low oil *** two categories contain abundant reserves in China’s major oilfields,but their occurrence states of crude oil are quite *** the average oil saturation of the OLOSR is defined at 40%,there are 13.1%-54.2%crude oil that could be recovered by using the existing EOR technology,especially in the primary OLOSRs with low permeability and the secondary OLOSRs with high permeability.

关键词： Low oil saturation Transition zones Occurrence state Oil displacement efficiency Gas flooding Surfactant flooding

A Study of the Characteristics of Microorganisms for Effective Degradation of Marine Oil Spills

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Petroleum Science 2006年第1期3卷 61-67页

作者： Zhang Zhongzhi wei xiaofang Zong Chang Yu Hongwen Li Chengjian He Ruibing Faculty of Chemistry ＆ Chemical Engineering China University of Petroleum Beijing 102249 China Bohai Oil Technical Service Company China National Offshore Oil Corp.Tanggu Hebei 065000 China

Four microorganism strains were isolated from coastal petroleum-polluted soil and sand samples of Bohai Sea oilfield; they were found to degrade marine oil spills effectively. The experimental results show that the degradation efficiency of crude oil with these four strains （XT-4, SZ-1-25, B-4-9, BS-3-12） is 95.97%, 96.01%, 97.99% and 98.99%, respectively, in their optimum conditions. The characteristics of bacterial biodegradation are investigated. The simulation biotreatment of oil-contaminated beach sand, with an initial oil content of 5,664mg/kg-dry-sand, shows that the residual oil content is 2,700 mg/kg-dry-sand and 2,679 mg/kg-dry-sand after 170 days＇ treatment with two bacteria （B-4-9, BS-3- 12）, respectively.

关键词： Petroleum pollution halophilic bacteria biodegradation simulation biotreatment of beach sand

Bao-Gan-Xiao-Zhi-Wan Treatment Attenuates Methionine-choline-deficient Diet-induced Metabolic Dysfunction-associated Steatohepatitis in Rats by Modulating the NF-κB Signal Pathway and Autophagy

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Journal of Clinical and Translational Hepatology 2024年第6期12卷 607-611页

作者： Liming Zhou Xiaobin Zeng xiaofang wei Wanying Shen Jie Yao weigang Wu Lanlan Ge Boping Zhou The Second Clinical Medical College Jinan University(Shenzhen People’s Hospital)ShenzhenGuangdongChina Department of Endocrinology Shenzhen Second People’s Hospitalthe First Affiliated Hospital of Shenzhen UniversityHealth Science Center of Shenzhen UniversityShenzhenGuangdongChina Center Lab of Longhua Branch and Department of Infectious Disease Shenzhen People’s Hospital(The Second Clinical Medical CollegeJinan University)ShenzhenGuangdongChina Department of Pathology(Longhua Branch) Shenzhen People’s Hospital(The Second Clinical Medical CollegeJinan University)ShenzhenGuangdongChina College of Pharmacy Gansu University of Chinese MedicineLanzhouGansuChina

Non-alcoholic fatty liver disease(NAFLD)is a condition involving the accumulation of liver fat in excess of 5–10%of its weight after excluding excessive alcohol intake and any other causes of liver disease or steatosis.1 NAFLD has increased with the occurrence of obesity,diabetes,and metabolic syndrome,due to which an international consensus of experts proposed renaming it metabolic dysfunction-associated fatty liver disease(MAFLD).

关键词： NAFLD liver intake

Triton X-100与牛血清白蛋白的相互作用

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分析化学 2000年第6期28卷 699-701页

作者：魏晓芳刘会洲中国科学院化工冶金研究所分离科学与工程青年实验室!北京100080

应用荧光光谱法研究了溶液体系中TritonX-100（TX）与牛血清白蛋白（BSA）之间的相互作用。实验表明TX对BSA的荧光有较强的猝灭作用，二者形成不发荧光的复合物所产生的静态猝灭是引起BSA荧光猝灭的主要原因。从荧光猝灭结果求得二者的... 详细信息

应用荧光光谱法研究了溶液体系中TritonX-100（TX）与牛血清白蛋白（BSA）之间的相互作用。实验表明TX对BSA的荧光有较强的猝灭作用，二者形成不发荧光的复合物所产生的静态猝灭是引起BSA荧光猝灭的主要原因。从荧光猝灭结果求得二者的结合常数，发现在不同TX浓度下，结合常数K及络合个数n均不同；低于TX的cmc，K=440mol／L，n=0．91，高于cmc，K=10mol／L，n＝0．42。疏水作用是TX与BSA相互结合的主要驱动力。

关键词：牛血清白蛋白荧光光谱

突发公共卫生事件下对居民健身空间的规划思考

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规划师 2020年第6期36卷 69-71,79页

作者：魏晓芳苏州科技大学建筑与城市规划学院

新型冠状病毒肺炎疫情发生后,人们意识到提升自身健康水平的重要性与紧迫性,对健身空间的需求日益增加。文章以城市健身空间作为研究对象,对城市健身空间的类型构成、各类要素及其分布特点进行了分析,针对城市公共健身空间数量不足、分... 详细信息

新型冠状病毒肺炎疫情发生后,人们意识到提升自身健康水平的重要性与紧迫性,对健身空间的需求日益增加。文章以城市健身空间作为研究对象,对城市健身空间的类型构成、各类要素及其分布特点进行了分析,针对城市公共健身空间数量不足、分布不均,使用不当、维护不力,以及重视不够、增长不匹配等问题,从宏观、中观和微观三个层次提出现代城市健身空间的规划应对策略,以期为提升公共健康水平、推动健康城市的可持续发展提供参考。

关键词：健康城市健身空间空间构成

2009年冬季平流层爆发性增温期间行星波活动特征

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空间科学学报 2020年第1期40卷 42-51页

作者：魏晓芳黄春明武汉大学电子信息学院武汉430072 地球空间环境与大地测量教育部重点实验室武汉430072

利用2008年12月至2009年4月的MERRA再分析数据资料,对2009年1月下旬北半球高纬平流层发生的强增温事件以及与之相关的行星波活动进行了研究.谱分析发现,SSW发生前后极区平流层内准16天行星波活动显著.利用二维谐波拟合法分别拟合温度场... 详细信息

利用2008年12月至2009年4月的MERRA再分析数据资料,对2009年1月下旬北半球高纬平流层发生的强增温事件以及与之相关的行星波活动进行了研究.谱分析发现,SSW发生前后极区平流层内准16天行星波活动显著.利用二维谐波拟合法分别拟合温度场准16天波4个波模(W1,W2,E1,E2)的振幅和相位,结果表明:背景西风减弱时四个波模的振幅均有不同程度的增大,且都在50°-80°N范围内的平流层中上层达到最大值;准16天W2波的增幅最大且辐合最强烈,其引起的背景流最大西风减速超过4 m.s-1·d-1,说明准16天W2波在该次增温事件中占主导地位;行星波传播与零风线移动关系密切,准16天W2波在中高纬地区垂直向上传播并近似呈现经向驻波结构,然后分别向极点和赤道两个方向传播,这表明中高纬地区可能是行星波的一个源区.

关键词：平流层爆发性增温行星波再分析资料

pH诱导牛血清白蛋白芳香氨基酸残基微环境变化的光谱分析

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光谱学与光谱分析 2000年第4期20卷 556-559页

作者：魏晓芳丁西明刘会洲中国科学院化工冶金研究所分离科学与工程青年实验室北京100080 中国科学院感光化学研究所北京100021

用荧光光谱和紫外吸收光谱研究了pH =2 3～ 1 1 3范围内牛血清白蛋白 (BSA)芳香氨基酸残基微环境的变化 ,以此推断蛋白质构象的变化 ,并讨论蛋白质表面疏水性变化的趋势。与中性环境相比 ,pH为 2 3时 ,色氨酸微环境的疏水性增强 ,蛋... 详细信息

用荧光光谱和紫外吸收光谱研究了pH =2 3～ 1 1 3范围内牛血清白蛋白 (BSA)芳香氨基酸残基微环境的变化 ,以此推断蛋白质构象的变化 ,并讨论蛋白质表面疏水性变化的趋势。与中性环境相比 ,pH为 2 3时 ,色氨酸微环境的疏水性增强 ,蛋白质局部表面疏水降低 ;pH为 1 1 3时 ,部分Phe残基微环境的极性增强 ,表明碱诱导蛋白质分子变性使蛋白质分子充分伸展 ,将更多疏水性氨基酸残基暴露于溶剂中。

关键词：牛血清白蛋白构象表面疏水性光谱分析

Analysis of Amino Acids in Houttuynia Cordata Thunb. by High Performance Liquid Chromatography-Diode Array Detector (HPLC-DAD)

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Medicinal Plant 2019年第2期10卷 28-34页

作者： Xuan FENG Zhannan YANG Zhu ZHENG Juan HU xiaofang wei Honghao HUO Cheng ZHAO Quling ZHANG Key Laboratory for Information System of Mountainous Areas and Protection of Ecological Environment of Guizhou Province Guizhou Normal University School of Life Sciences Guizhou Normal University

[Objectives] The biologically active compounds of Houttuynia cordata Thunb. as a medicinal and edible plant are well documented. However, amino acid as an important indicator of the value of H. cordata is little reported. [Methods] Amino acids of the H. cordata were analysed by pre-column derivatization with 2,4-dinitrochlorobenzne(CDNB) coupled to HPLC/DAD. The optimized conditions of the amino acids derivatized by CDNB were followed: 110 ℃ of hydrolysis temperature, 1∶12 of the equivalent proportion between amino acid and CDNB, 80 min of derivatization reaction time and 80 ℃ of derivatization reaction temperature. The method was used to determine the amino acids of H. cordata samples from 11 different geographical sites in Guizhou. [Results] The results suggested that the contents of 17 amino acids were quite variable at different H. cordata samples. [Conclusions] This study will provide a basis for the quality evaluation of H. cordata nutrition.

关键词： Houttuynia cordata Thunb. Amino acid High performance liquid chromatography Medicinal plant