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搜索结果: 61-75 共查到理学 PM2.5相关记录76条 . 查询时间(0.349 秒)
There is growing evidence that organo-nitrogen compounds may constitute a significant fraction of the aerosol nitrogen (N) budget. However, very little is known about the abundance and origin of this ...
The characteristics of daytime and nighttime suburbs PM2.5 in Shanghai were analyzed by synchrotron based X-ray fluorescence during the period of October, 2006 and November, 2007. The mass concentrati...
In order to further understand the sources of PM2.5 in Shanghai air, the synchrotron X-ray fluorescence microprobe at the BL-4A Beamline of Photon Factory of High Energy Accelerator Research Organizat...
Influences of specific sources of inorganic PM2.5 on peak and ambient aerosol concentrations in the US are evaluated using a combination of inverse modeling and sensitivity analysis. First, sulfate an...
对2005年9月至2006年5月所采集的24份北京市PM2.5样品进行序列连续提取,分别得到水溶态、脂溶态和不溶态3个分量的铅;在最佳仪器工作条件下,采用电感耦合等离子体质谱(ICP-MS)测定上述各分量中铅的浓度及同位素比值。采用GBW09133考察铅浓度测定的准确度,并用SRM 981标准铅试剂校正质量歧视效应和仪器漂移。结果表明,采用ICP-MS分析大气PM2.5中不同形态铅浓度及同位素比值...
The Göte–2005 measurement campaign aimed at studying the influence of the winter thermal inversions on urban air pollution. Elemental speciation of PM2.5 aerosol particles, collected on Teflon fi...
Water soluble inorganic particles components (Cl−, SO42−, NO3−, and NH4+) and concentrations of their associated precursor gases (HCl, SO2, HNO3, NH3) were semi-continuously measured...
Strong atmospheric photochemistry in summer can produce a significant amount of secondary aerosols, which may have a large impact on regional air quality and visibility. In the study reported herein,...
The impact that changes in future climate, anthropogenic US emissions, background tropospheric composition, and land-use have on summertime regional US ozone and PM2.5 concentrations is examined throu...
Estimates of PM2.5 distributions based on satellite data depend critically on an established relation between AOD and ground level PM2.5. In this study we performed an experiment at Cabauw to establis...
In the present study, we examined PM2.5 continental rural background aerosols, which were collected during a summer field campaign at K-puszta, Hungary (4 June-10 July 2003), a mixed coniferous/decidu...
Inter-comparisons of European air quality models show that regional transport models, including the EMEP (Co-operative Programme for monitoring and evaluation of the long-range transmission of air pol...
在北京市郊区设立采样点,使用Gent采样器收集PM10(直径小于10μm)和PM2.5(直径小于2.5μm)大气颗粒物。利用仪器中子活化分析(INAA)法对2005年春、夏两季采集的样品进行测量,用k0法中子活化分析(ADVNAA软件)对元素含量进行定量计算,得出春季PM2.5平均浓度为41.43μg/m3,PM10平均浓度为140.82μg/m3;夏季PM2.5平均浓度为50.63μg/m...
Sensitivity of PM2.5 to climate in the Eastern US: a modeling case study     PM2.5  climate  Eastern US  modeling case       font style='font-size:12px;'> 2008/12/17
The individual effects of various meteorological parameters on PM2.5 concentrations in the Eastern US are examined using the PMCAMx chemical transport model so that these effects and their relative ma...
分子标记辅助选择聚合小麦抗白粉病基因Pm2、Pm4a、Pm21的聚合体.           font style='font-size:12px;'> 2007/7/28
期刊信息 篇名 分子标记辅助选择聚合小麦抗白粉病基因Pm2、Pm4a、Pm21的聚合体. 语种 中文 撰写或编译 撰写 作者 高安礼,何华纲,陈全战,张守忠,陈佩度 第一作者单位 南京农业大学 刊物名称 作物学报 页面 31(11):1400-1405 出版日期 2005年 11月 12日 文章标识(ISSN) 0496-3490 相关项目 小片段小麦异易位系的高效诱致和精确鉴定

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