Measure: To estimate the cranial capacity of each skull in the Gizmo, measure the area of the part of the cranium that houses the brain. This part of the cranium is roughly behind the red line in the diagram at right.
Chemical dyes are sometimes injected into patients prior to an MRI (magnetic resonance imaging) to enhance internal images. However, certain widely used MRI dyes may cause a number of side effects, including a serious, potentially fatal disease known as nephrogenic systemic fibrosis, or NSF.
â¢ Methylene blue (and oxidation product, Azure B) is a basic (alkaline pH) dye that stains acidic (acidic pH) structures blue. These structures are called Basophilic. â¢ Eosin is an acid (acidic pH) dye that stains basic (alkaline pH) structures pink/orange. These structures are called Eosinophilic.