Fig. 2
From: Evaluation of aortic changes in elderly people autopsied with acquired immunodeficiency syndrome
a Histological section stained with picrosirius seen under polarized light, 1250x final increase, evidencing a greater amount of birefringent collagen fibers. b Quantification of collagen fibers, stained by picrosirius by Leica Qwin Plus® software, evidenced by the blue area. c Histological section stained with verhoeff seen under common light, 1250x final increase, showing a greater amount of elastic fibers, evidenced by the blackened coloration. d Quantification of elastic fibers, stained by verhoeff by Leica Qwin Plus® software, evidenced by the blue area