Table 2. Average long and short axis lengths of cell nuclei incubated on bare silicon, polished blanket tungsten, and polished silicon oxide for 24 hours. Data spreads correspond to one standard deviation.

Specimen	Number of cells inspected	Long-axis length (μm)	Short-axis length (μm)	Long-to-short axis length ratio
bare silicon	184	23 ± 5	17 ± 4	1.4 ± 0.2
polished tungsten	494	22 ± 4	13 ± 2	1.7 ± 0.3
polished silicon oxide	72	20 ± 4	12 ± 3	1.7 ± 0.4