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Table 1.

Mean values (±s.d.) of surface profile parameters obtained from 3-D images (N=3) of the four types of substrata

PMMA
PP
Profile parametersSmoothRoughSmoothRough
Low magnification (5×)     
   Ra (μm) 0.36±0.13 1.74±0.65 0.20±0.03 27.02±1.21 
   Rz (μm) 10.52±0.57 16.22±2.80 16.87±18.65 262.14±50.32 
High magnification (50×)     
   Ra (μm) 0.07±0.01 1.98±0.27 0.03±0.01 18.73±11.77 
   Rz (μm) 1.51±0.09 15.19±2.29 3.37±3.35 106.65±29.83 
   Lr 1.004±0.001 1.055±0.011 1.008±0.001 1.776±0.286 
PMMA
PP
Profile parametersSmoothRoughSmoothRough
Low magnification (5×)     
   Ra (μm) 0.36±0.13 1.74±0.65 0.20±0.03 27.02±1.21 
   Rz (μm) 10.52±0.57 16.22±2.80 16.87±18.65 262.14±50.32 
High magnification (50×)     
   Ra (μm) 0.07±0.01 1.98±0.27 0.03±0.01 18.73±11.77 
   Rz (μm) 1.51±0.09 15.19±2.29 3.37±3.35 106.65±29.83 
   Lr 1.004±0.001 1.055±0.011 1.008±0.001 1.776±0.286 

Ra, mean roughness of the profile; Rz, maximum height of the profile; Lr,profile length ratio.

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