background: when provisional restorations are worn for long term period, the adhesion of bacteria becomes a primary factor in the development of periodontal diseases. the aims of this study were to evaluate the surface roughness and bacterial adhesion of four different provisional fixed prosthodontic materials. methods: ten cylindrical specimens were prepared from bis-acrylic composites (previs...

Nanoscale surface corrugation strongly determines the plasmonic response of gold nanoparticles with dimensions of several tens of nanometres. Scattering spectra of individual spheres with a rough surface were found to red-shift and broaden. The plasmon modes exhibited quadrupole damping, in contrast to particles with smooth surfaces. Additionally, rougher spheres display a higher SERS activity,...

In this research study, we focus on the tree test results as well first-order kinetic model to evaluate flotation data propose a conceptual design of circuit for specific coal sample. Results from showed it was possible achieve product with ash content less than 10% 8% combustible recovery and indicated sample, obtain low – condition. Kinetic some streams had same constant, so could combine sim...

Atmospheric-pressure dielectric barrier discharges (AP-DBD) generally result in highly cross-linked coatings with a low retention of the monomer structure. Moreover, when high concentrations of precursor or/and reactive gas is used, coatings become less homogenous, less conformal and rougher. This study highlights the possibility to deposit smooth, conformal and polymer-like coatings thanks to ...

At a fixed lattice spacing, as determined by say mρ, adding additional fermion flavors to a dynamical simulation produces rougher gauge field configurations at the lattice scale. For domain wall fermions, these rough configurations lead to larger residual chiral symmetry breaking and larger values for the residual masses, mres. We discuss ongoing attempts to reduce chiral symmetry breaking for ...

OBJECTIVES This study: 1) analyzed the surface roughness of five novel resin composites that contain nanoparticles after polishing with three different one-step systems and 2) evaluated the effectiveness of these polishers and their possible surface damage using scanning electron microscope (SEM) analysis. METHODS The resin composites evaluated in this study include CeramX, Filtek Supreme XT,...

We examined visual estimation of surface roughness using random, computer-generated, three-dimensional (3D) surfaces rendered under a mixture of diffuse lighting and a punctate source. The angle between the tangent to the plane containing the surface texture and the direction to the punctate source was varied from 50 to 70 deg across lighting conditions. Observers were presented with pairs of s...

This paper disctu;ses some advances in non-contact, interferometric optical profilers. Topics discussed include: (i) The advantages of using a white light source, rather than a laser source, (ii) The tradeoff between the use of Michelson, Mirau, and Linnik interferometers for different fields of view and different lateral resolutions, and.(iii) Techniques for removing errors in the reference su...