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The groundwater sampling and nitrate nitrogen testing were carried out for 13 times from 2005 to 2011 in order to investigate the nitrate nitrogen dynamic change of groundwater in the intensive agricultural area of Daxing district and explore its control countermeasures. The results indicated that the mean value of nitrate nitrogen in groundwater of this area was 1.58 mg/L, which met the criterion...
Because of its own characteristics of innovative enterprise, benefit of innovative enterprise depends more on senior executives' creative contribution, and the incentives for senior executives of innovative enterprise is more valued by the market. The paper uses innovative enterprises of East China as samples, and analyses empirically the relationship between senior executives' payments, stock equity...
This study was to investigate the diagnosis of DSCT pre-operation about the left ventricular function in complex congenital heart disease with diminished pulmonary blood flow in comparison of 2D-echocardiography. 50 patients scheduled for operation because of suspected or definited complex congenital heart disease with diminished pulmonary blood flow were examined by DSCT. The images were quantitatively...
Determination of optimal sampling transects and pollutants for river sediments are essential and valuable. To determine if the concentration of some metals were highly correlated, correlations between heavy metals (As, Pb, Cd, Cr, Hg, Cu, Ni and Zn) were analyzed using statistic analysis software (SAS) based on monitoring data of heavy metals along the whole watercourse sediments of Dagu River. To...
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