Figure 3
From: Influence of E-smoking liquids on human periodontal ligament fibroblasts
Reaction of the fibroblasts stained with calcein-AM/ethidium homodimer II. Reaction of the periodontal ligament fibroblasts to the different liquids (A = control; B = propylene glycol; C = nicotine; D = hazelnut flavor, E = lime flavor, F = menthol flavor), stained with calcein-AM/ethidium homodimer II after an incubation time of 24 h (magnification ×100, bar = 100 μm).