This article issued the ethical significance to strengthen rural health work. Authors think strengthening rural health work is a concrete embody for serving the people wholeheartedly;beneficial to realize the health service fair and to promote the rural socialist spiritual civilization construction.

To perform well the health services to the peasant workers ,which is the essential demands to construct a coordinated society and the responsibility of government;and also available to achieve the fairness of health services;benefit to the peasant workers to share the equai right of health,which displayed the socialism humanitarianism.

To investigate the influence of different concentrations of IL-8 on the migration of vascular endothelial cells and find out the best IL-8 concentration, the transwell chamber motility assay and the scrape motility assay were applied to observe the migration of vascular endothelial cells induced by IL-8. The results demonstrated that the migration of vascular endothelial cells was increased significantly under different IL-8 concentrations, while the best effect occurred when IL-8 concentration was 100 ng/ml.
Cell Movement ; drug effects ; Cells, Cultured ; Dose-Response Relationship, Drug ; Endothelial Cells ; cytology ; drug effects ; Endothelium, Vascular ; cytology ; Humans ; Interleukin-8 ; administration & dosage ; pharmacology

Laser-induced breakdown spectroscopy ( LIBS) was used to detect the compositions of soil in the air, and the quantitative analysis model with genetic algorithm-partial least squares ( GA-PLS ) was established. A total of fifty-eight soil samples were split into calibration, monitoring and prediction sets. Eleven soil compositions including Mn, Cr, Cu, Pb, Ba, Al2 O3 , CaO, Fe2 O3 , MgO, Na2 O, and K2 O were quantitatively analyzed. The results demonstrated that, as a pretreatment method for optimizing the selection of spectral lines, GA could be effectively used to reduce the number of spectral lines for use in building PLS model, and hence simplify the quantitative analysis model. More importantly, for most of the soil compositions, GA-PLS could significantly improve the prediction ability compared with the conventional PLS model. Take Mn as an example, the root-mean-square error of prediction ( RMSEP ) was decreased from 0. 0215% to 0 . 0167%, and the mean percent prediction error ( MPE ) was decreased from 8 . 10% to 5 . 20%. The research provides an approach for further improving the accuracy of LIBS quantitative analysis in soil.