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Polycyclic aromatic hydrocarbon:environmental sources,associations with altered lung function and potential mechanisms

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Chinese Medical Journal 2020年第13期133卷 1603-1605页

作者： Li-Min Cao ge mu Wei-Hong Chen Department of Occupational&Environmental Health School of Public HealthTongji Medical CollegeHuazhong University of Science and TechnologyWuhanHubei 430030China Key Laboratory of Environment and Health Ministry of Education&Ministry of Environmental Protectionand State Key Laboratory of Environmental Health(Incubating)School of Public HealthTongji Medical CollegeHuazhong University of Science and TechnologyWuhanHubei 430030China

Polycyclic aromatic hydrocarbon(PAH)molecules are a large group of organic compounds with two or more fused benzene rings arranged in various confgurations."To date,hundreds of PAHs have been *** are widespread environmental contaminants formed as a result of incomplete combustion of carbonaceous materials in both natural and anthropogenic *** to the natural sources,such as volcanic eruptions and wild fires,anthropogenic sources,such as industrial processes,cigarette smoke,vehicular exhaust,residential heating fuels and charcoal-grilled and flame-broiled food,make a larger contribution to the generation of atmospheric PAHs.'Through inhalation,ingestion and dermal contract,PAHs from all sources can easily be absorbed in the body and further metabolized and excreted in *** urinary monohydroxylated PAH(OH-PAH)has been widely considered as a biomarker to represent individual PAH exposure levels in many studies.

关键词： process. aromatic incomplete

Discovery of a novel 112-type iron-pnictide and La-doping induced superconductivity in Eu_(1-x)La_xFeAs_2(x=0–0.15)

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Science Bulletin 2017年第3期62卷 218-221页

作者： Jia Yu Tong Liu Bo-Jin Pan Bin-Bin Ruan Xiao-Chuan Wang Qing-ge mu Kang Zhao gen-Fu Chen Zhi-An Ren Institute of Physics and Beijing National Laboratory for Condensed Matter Physics Chinese Academy of Sciences Beijing 100190 China Collaborative Innovation Center of Quantum Matter Beijing 100190 China School of Physical Sciences University of Chinese Academy of Sciences Beijing 100039 China

We report the discovery and characterization of a novel 112-type iron pnictide EuFeAs2, with La-doping induced superconductivity in a series of Eu1- xLaxFeAs2. The polycrystalline samples were synthesized through solid state reaction method only within a very narrow temperature window around 1073 K. Small single crystals were also grown from a flux method with the size about 100μm. The crystal structure was identified by single crystal X-ray diffraction analysis as a monoclinic structure with space group of P2 1/m. From resistivity and magnetic susceptibility measurements, we found that the parent compound EuFeAs2 shows distinct anomalies probably due to the Fe2＋ related antiferromagnetic/structural phase transition near 110K and the Eu2＋ related antiferromagnetic phase transition near 40K. La-doping suppressed both phase transitions to lower temperatures and induced superconducting transitions with a Tc - 11 K for Eu0.85La0.15FeAs2.

关键词： EuFeAs2 Superconductivity La-doping Antiferromagnetic transition

壳聚糖-刺玫果提取物复配涂膜对半干型风干牛肉贮藏品质的影响

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中国调味品 2024年第5期49卷 24-30页

作者：曾睿汤艳凝斯琴其木格陆美霖刘媛媛张智勇陈瑞娟倪娜内蒙古民族大学生命科学与食品学院内蒙古通辽028006 通辽市农牧科学研究所内蒙古通辽028015 内蒙古赤峰市红山区市场监督管理局内蒙古赤峰024099

在25℃贮藏条件下,以未涂膜的半干型风干牛肉为对照组,用1.5%壳聚糖、0.5%、1.0%、1.5%刺玫果提取物和1.0%2,6-二叔丁基对甲酚(butylated hydroxytoluene,BHT)复配涂膜的半干型风干牛肉为处理组,利用水分含量、色度、过氧化值、pH值、... 详细信息

在25℃贮藏条件下,以未涂膜的半干型风干牛肉为对照组,用1.5%壳聚糖、0.5%、1.0%、1.5%刺玫果提取物和1.0%2,6-二叔丁基对甲酚(butylated hydroxytoluene,BHT)复配涂膜的半干型风干牛肉为处理组,利用水分含量、色度、过氧化值、pH值、硫代巴比妥酸反应物(thiobarbituric reactive substances,TBARS)值、挥发性盐基氮(total volatile basic nitrogen,TVB-N)值、菌落总数表征半干型风干牛肉在贮藏第0,3,6,9,12天时的品质变化。结果表明,与对照组相比,涂膜处理组均能较好地保持半干型风干牛肉的贮藏品质,其中1.5%刺玫果提取物复配壳聚糖涂膜显著优于其他涂膜(P<0.05),可减缓半干型风干牛肉色泽褐变和水分损失,有效抑制微生物生长以及过氧化值、TBARS值和TVB-N值的上升。

关键词：刺玫果半干型风干牛肉复配涂膜贮藏品质

The dual effect of OxyR on cell response to ZnO Nanoparticles in E. coli

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The dual effect of OxyR on cell response to ZnO Nanoparticle...

Highly efficient through-space charge transfer TADF molecule employed in TADF-and TADF-sensitized organic light-emitting diodes

江苏省遗传学会第九次会员代表大会暨学术研讨会

作者： mu ge Lin Xiao State Key Laboratory of Pollution Control and Resources Reuse School of the Environment Nanjing University

The increasing use of zinc oxide nanoparticles（ZnO NPs） is likely to increase their release to the aquatic environment, and raises concerns about their environmental impacts. We explored the toxicity of ZnO NP using an oxidative stress sensitive E. coli mutant（△oxyR） and the wild type strain MG1655. Growth inhibition test revealed that the ZnO NPs displayed similar toxicity with Zn2+;however, bactericide tests revealed that the toxicity of ZnO NPs was higher than Zn2+ and the generation of reactive oxygen species（ROS） by ZnO NPs could be the main cause of toxicity under such low dissolution circumstance. The extracellular polymeric substances（EPS）, acting as a barrier, could protect E. coli against toxicity of ZnO NPs, but the formation of biofilm was more sensitive to ZnO NPs and Zn2+ toxicity than growth inhibition, indicating the function of cells was more sensitive to pollutant toxicity.

关键词： ZnO NPs E.coli △oxy R mutant ROS EPS

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Science China Chemistry 2024年第4期67卷 1270-1276页

作者： Jiasen Zhang Deli Li Wei Li Yujie Wu Xilin mu Chunyu Liu Kaibo Fang Ziyi ge Zhejiang Provincial Engineering Research Center of Energy Optoelectronic Materials and Devices Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China State Key Laboratory of Luminescent Materials and Devices and Institute of Polymer Optoelectronic Materials and Devices South China University of TechnologyGuangzhou 510640China

The inception and harnessing of excitons are paramount for the electroluminescence performance of organic light-emitting devices(OLEDs).Through-space charge transfer(TSCT)via intramolecular interaction has proved to be one of the most potent techniques employed to achieve 100% internal quantum ***,molecular strategies utilized to comprehensively enhance the electroluminescent performance of TSCT emitters regarding improving the photoluminescence quantum yield(PLQY)and elevating the light out-coupling efficiency remain *** surmount this challenge,we deliberately designed and synthesized a proof-of-concept TSCT emitter called CzO-TRZ by incorporating an extra carbazole donor into spiroheterocyclic *** introduction of rigid spiral fragments can immensely boost the horizontal orientation dipole ratio and establish an extra through-bond charge transfer(TBCT)radiative decay *** a result,a very high PLQY of 98.7%,fast kRISCof 2.2×10^(5)s^(-1)and high k_(r)^(s) of 2.2×10^(7)s^(-1),and an ultrahigh horizontal dipolar ratio of 90%were concurrently achieved for Cz O-TRZ blended ***,corresponding thermally activated delayed fluorescence(TADF)-and TADF-sensitized fluorescence(TSF)-OLEDs based on CzO-TRZ demonstrated external quantum efficiencies(EQEs)of 33.4% and 30.3%,respectively,highlighting its versatile applications as both an emitter and sensitized host.

关键词： organic electronics organic light-emitting diodes polycyclic aromatic hydrocarbons multiple-resonance

Colloidal quantum-dot light emitting diodes with bias-tunable color

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Photonics Research 2022年第7期10卷 1633-1639页

作者： ge mu TIANYU RAO MENGLU CHEN YIMEI TAN QUN HAO XIN TANG School of Optics and Photonics Beijing Institute of TechnologyBeijing 100081China Beijing Key Laboratory for Precision Optoelectronic Measurement Instrument and Technology Beijing 100081China Yangtze Delta Region Academy of Beijing Institute of Technology Jiaxing 314019China

Although the performance of quantum-dot-based light emitting diodes(QLEDs)has been significantly enhanced over the past years,conventional full-color QLED displays still rely on the side-by-side pattern techniques of red(R)/green(G)/blue(B)quantum dots(QDs).Such lateral integration of multi-color pixels imposes technological difficulty in the development of high-resolution displays due to limited pixel density and fill ***,we demonstrate the development of full-color QLEDs with bias-tunable emission spectra by engineering mixed R/G/B QDs as light emitting *** Commission Internationale de l'Eclairage(CIE)chromaticity coordinates,QLEDs with bias-tunable color exhibit wide color variation ranging from red(0.649,0.330)to green(0.283,0.305)to blue(0.255,0.264)upon increasing voltages and can be tuned to emit white light(0.316,0.325).More importantly,the fabricated multi-color QLEDs show high luminance approaching 103cd m^(-2)and superior external quantum efficiency of 13.3%.Benefitting from the wide spectral tunability and light emitting efficiency,we believe the proposed multi-color QLEDs have great application prospects for both displays and lighting.

关键词： tunable diodes emitting

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西辽河通辽段河床沉积物渗透系数的现场测定

地下水 2024年第4期46卷 61-62,96页

作者：刘笑宇澈丽木格张彤豪周天雨刘圣昱内蒙古农业大学水利与土木建筑学院内蒙古呼和浩特010018 通辽市水利事业发展中心内蒙古通辽028000 河海大学水文水资源学院/水灾害防御全国重点实验室江苏南京210098

采用不同方法对西辽河通辽段河床沉积物渗透系数进行现场测定,获取各点位的垂向渗透系数。并分别在探坑、土样坑、渗透仪渗水试验、竖管试验、渗坑法渗水试验、双环渗水试验位置处及其附近,先从河底表面取沉积物样,再从岩性明显变化的... 详细信息

采用不同方法对西辽河通辽段河床沉积物渗透系数进行现场测定,获取各点位的垂向渗透系数。并分别在探坑、土样坑、渗透仪渗水试验、竖管试验、渗坑法渗水试验、双环渗水试验位置处及其附近,先从河底表面取沉积物样,再从岩性明显变化的不同深度取样,带回实验室,进行颗粒分析,探讨河床沉积物渗透系数与颗粒级配之间的关系。结果表明:随着河床沉积物中砂石含量的增加其渗透系数也增大;反之,河床沉积物中黏土含量增加其渗透系数减小。沉积物的颗粒级配是影响渗透系数的重要因素,颗粒级配对于沉积物的孔隙尺寸、孔隙的形状及大小都有很大的影响。研究结果可为计算地表水与地下水的交换量提供可靠的水文地质参数,进而提高地下水资源评价结果的精度。

关键词：渗透仪渗水试验竖管试验渗坑法渗水试验双环渗水试验渗透系数河床沉积物西辽河通辽段颗粒分析

Superconductivity at 7.8 K in the ternary LaRu2As2 compound

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Science Bulletin 2016年第12期61卷 921-924页

作者： Qi Guo Bo-Jin Pan Jia Yu Bin-Bin Ruan Dong-Yun Chen Xiao-Chuan Wang Qing-ge mu gen-Fu Chen Zhi-An Ren Institute of Physics and Beijing National Laboratory for Condensed Matter Physics Chinese Academy of SciencesBeijing 100190China Collaborative Innovation Center of Quantum Matter Beijing 100190 China

Here we report the discovery of superconductivity in the ternary LaRu2As2 compound. The polycrystalline LaRu2As2 samples were synthesized by the conventional solid state reaction method. Powder X-ray diffraction analysis indicates that LaRu2As2 crystallizes in the ThCr2Si2-type crystal structure with the space group 14/ mmm （No. 139）, and the refined lattice parameters are a = 4.182（6）A and c = 10.590（3）A. The temperature dependent resistivity measurement shows a clear superconducting transition with the onset Tc （critical tempera- ture） at 7.8 K, and zero resistivity happens at 6.8 K. The upper critical field at zero temperature μ0Hc2（0） was estimated to be 1.6 T from the resistivity measurement. DC magnetic susceptibility measurement shows a bulk superconducting Meissner transition at 7.0 K, and the isothermal magnetization measurement indicates that LaRu2As2 is a type-II superconductor.

关键词： Superconductivity LaRu2As2 - Ternarycompound ThCr2Si2-type Magnetization Uppercritical field

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青藏高原交通可达性对地域凝聚力的影响

青海师范大学学报（自然科学版） 2024年第1期40卷 11-21页

作者：其力木格曹小曙康喆文杨洁杨如玉陈书潮景林陕西师范大学西北国土资源研究中心陕西西安710119 陕西师范大学全球区域与城市研究院陕西西安710119 陕西师范大学西北城镇化与国土环境空间模拟重点实验室陕西西安710119 西安外国语大学俄语学院陕西西安710128

区域内交通网络的发展特征及规律是连接各个地区、促进资源流动和人员流动的重要纽带,对区域整体发展和地域凝聚力的研究起到了至关重要的作用.青藏高原作为中国最大、世界海拔最高的高原,具有广阔的地理范围和多样的地理特征.通过分析... 详细信息

区域内交通网络的发展特征及规律是连接各个地区、促进资源流动和人员流动的重要纽带,对区域整体发展和地域凝聚力的研究起到了至关重要的作用.青藏高原作为中国最大、世界海拔最高的高原,具有广阔的地理范围和多样的地理特征.通过分析青藏高原地区1990-2030年交通可达性的空间格局和地域凝聚力,揭示了交通可达性对地域凝聚力的影响,并通过空间公平视角提供了更为全面的认识.研究发现,道路的扩建促进了整体的可达性水平;区域铁路可达性在空间上分布逐渐公平,对地域凝聚力有正向影响.根据2030年铁路可达性对2030年地域凝聚力影响的趋势进行展望,以支持青藏高原地区的可持续发展和社会经济均衡增长.未来应强化青藏高原国土空间体系的规划,尽快建设拉萨至阿里的铁路线路,为中国式现代化贡献青藏高原的力量.

关键词：地域凝聚力交通可达性区域发展青藏高原