About 3% of dry salt in the specimen was expressed by way of immersing the specimen (50*50*20 mm) in 10% (wt%) NaCl solution for 24 h.
Statistical analysis was carried out to develop an equation, in which the wear volume of the polymeric specimen was expressed in terms of the investigated parameters.
Statistical analysis was carried out to develop an equation in which the wear volume of the specimen was expressed in terms of sliding distance, contact pressure and sliding speed.
Viral load in each specimen was expressed as the number of HPV copies/genome equivalent or cell.
The neutralization activity of a patient's serum specimen was expressed as the maximum serum dilution that would reduce the number of viral foci by 80% or more.
The surface of the blue staining in a given specimen was expressed as a percentage of the brown area (HBME-1-related) in a corresponding section which was treated as 100%%.
The proportion of tissue corresponding to connective tissue matrix in each specimen was expressed as connective tissue density, defined as the percentage of intersection points overlying within the tissue extension limited by the grid.
In the present study, a viral load in each specimen was expressed as the number of HPV copies/genome equivalent or cell, using a conversion factor of 6.6 pg of DNA cell−1 in order to make comparisons with the results of other studies (Si et al, 2003).
In brief, we created a calibration curve for the aluminum step wedge, then the optical density of each specimen was expressed in terms of the equivalent thickness of the wedge in accordance with the following formula: y = aln x + b (y: optical density, x: thickness of aluminum, ' a' and ' b': coefficients, ln: natural log value).
Regression analysis of the data was carried out to develop equations for the composites in which the wear volumes of the specimens were expressed in terms of simultaneous contribution from the influence of load, abrading particle size, sliding speed and their mutual interactions.
