Safety Evaluation of Engineered Nanomaterials for Health Risk Assessment: An Experimental Tiered Testing Approach Using Pristine and Functionalized Carbon Nanotubes

<table>Histograms showing cell viability measured by MTT assay in A549 cells after 24 h and 48 h exposure to <i>pristine</i> multiwalled CNTs: MWCNT; laboratory-made functionalized nanotubes: MW-COOH (carboxyl functionalized) and MW-NH<sub>2</sub> (amino-functionalized); carbon black: CB; silica: SiO<sub>2</sub>. Data represent the mean <svg height="9.5625" id="M15" style="vertical-align:-0.3003pt" version="1.1" viewbox="0 0 15.775 9.5625" width="15.775" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
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</svg> compared to control (100% cell viability). </table>

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fig1

Figure 1

Figure 1: Safety Evaluation of Engineered Nanomaterials for Health Risk Assessment: An Experimental Tiered Testing Approach Using Pristine and Functionalized Carbon Nanotubes 

Figure 1 | Safety Evaluation of Engineered Nanomaterials for Health Risk Assessment: An Experimental Tiered Testing Approach Using Pristine and Functionalized Carbon Nanotubes 