Research Article

Study on Lung Injury Caused by Fine Particulate Matter and Intervention Effect of Rhodiola wallichiana

Figure 6

Expression of 4-HNE in each group of rats by immunohistochemical staining analysis (average optical density). 4-HNE in the PM group was obviously higher than that in the NC and NS groups. 4-HNE expression of the RW group was lower than that of the PM group. ā€œā€ in the figure indicates a statistical difference, .