|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Lead and Cadmium Contamination of Different Roadside Soils and Plants in Peshawar City, Pakistan显示文摘Soil and plant samples were collected from roadside sites (along with primary, secondary and tertiary roads) and reference site to investigate the contamination of soils and old common plant species with lead (Pb) and cadmium (Cd) in Peshawar City, Pakistan. All the data were analyzed using ANOVA analysis that showed a significant (P ≤ 0.01) variation in Pb and Cd concentrations in the roadside soils and plants as compared to the reference site. The mean concentrations of Pb and Cd were 53.9 and 6.0 mg kg-1 in soils and 49.1 and 10.9 mg kg-1 in plants, respectively. Significant variation (P ≤ 0.01) in concentrations of Pb and Cd in soil and plant samples along with primary, secondary and tertiary roads might be due to different traffic densities. The highest value (9.4) of metal accumulation index (MAI) was observed for Eucalyptus camaldulensis. In selected plant species, the Pb and Cd accumulation was found in the order of E. camaldulensis > Ficus elastica > Dalbergia sissoo > Alstonia scholaris. The roadside soils and plants were highly contaminated with Pb and Cd as compared to the reference site. | S.KHAN M.A.KHAN S.REHMAN | 2011 | Pedosphere2011，21，3： | 6 |
| 2 | 欧元——一种新的全球贸易货币显示文摘一、概述欧盟(EU′S)与欧洲货币联盟(EMU)的成立是布雷顿森体系瓦解以后国际货币体系最重要的发展之一。这一史无前例的事件对欧洲将产生什么影响尚是一个未知数,更不必说其将对欧盟以外的整个世界所产生的巨大影响。1999年欧元的诞生将是固定汇率体系解体以来世界货币与贸易结构最重大的变革,它将对世界贸易体系与各国的官方储备的分配产生深远影响,并作用于世界汇率体系,因为一方面它消除了欧盟成员国内部贸易的汇率风险,而另一方面却可能加大欧盟与非欧盟国家之间贸易的汇率风险。 | Scheherazade S.Rehman 蔡利安 肖俊宏 | 1998 | 财经政法资讯1998，0，4： | 0 |
| 3 | A Numerical Fluid Analysis for Early Nonlinear Mode Evolution of Fast Electron Beams in Dense Plasmas显示文摘Nonlinear mode evolution for relativistic electrons in dense plasmas is analyzed in a three-dimensional fluid approach.Similar to the results previously obtained in particle-in-cell simulations,it is found that oblique modes dominate two-stream and filamentation modes in the linear stage.On the other hand a power spectrum analysis shows the nonlinear development of the high wavenumber modes. | S.REHMAN 王晓钢 刘健 雷奕安 刘悦 | 2009 | Plasma Science and Technology2009，11，6： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员