Statement of problem: Shade matching is an important property in fixed prosthodontics for achieving optimal esthetics. However, there is a lack of information on how color is affected by fabrication procedure. Purpose: To evaluate and to compare the color changes observed after repeated firing (3, 5 and 7) of Pressable ceramic system veneering with two different veneering porcelain shades using...

A pulse-burst laser has been installed for Thomson scattering measurements on the Madison Symmetric Torus reversed-field pinch. The laser design is a master-oscillator power-amplifier. The master oscillator is a commercial Nd:YVO(4) laser (1064 nm) which is capable of Q-switching at frequencies between 5 and 250 kHz. Four Nd:YAG (yttrium aluminum garnet) amplifier stages are in place to amplify...

For most of this midterm exam we are interested in describing the quantum behavior of a particle –such as an atom or a ion– which is confined in a double well potential. The particle can be in either the left or right well. It has energy ER = E0 − ΔE in the right well and energy EL = E0 + ΔE in the left well. The barrier between the two wells is not very high, so the particle can tunnel between...

Polyphosphate is a phosphate polymer which is effective for stain removal and prevention of stain deposition. Ultraphosphate belongs to the polyphosphate group and has a highly branched mesh-like structure. To evaluate stain control ability of ultraphosphate, we used HAP powder, glass-ionomer cement and detached human teeth for models of in vitro stain control experiments. When using HAP powder...

This study aimed to evaluate the effects of repolishing on surface microhardness (SMH), color change (ΔE), and translucency parameter (TP) previously in situ eroded computer-aided design/computer-aided manufacturing (CAD/CAM) restorative materials human enamel. Each 8 volunteers wore an intraoral appliance containing 3 CAD/CAM material specimens (IPS e.max CAD lithium disilicate ceramic, Lava U...

Counting small peaks on large backgrounds in XRF applications is a process limited by the statistics of estimating both the counts and the background in the peak region. Improving energy resolution ΔE helps by increasing peak/background ratio and providing a more accurate estimate of the background but also reduces counting statistics due to increased pileup losses. Time variant filtering techn...

AIM The aim of this study was to firstly evaluate the esthetics of a dielectric multilayer coating on titanium below porcine tissue (in vitro porcine model). Secondly, a polymer model was used to investigate the same samples to compare the models to each other and discuss their validity for optical assessment of esthetic coatings for implant applications. MATERIALS & METHODS A dielectric mirr...

p38 Mitogen-activated protein kinase (p38 MAPK) is a protein kinase critically involved in the progress of inflammation/stress-associated diseases. Our data suggested that javamide analogues may contain strong anti-inflammation activities, but there is little information about their effects on p38 MAPK. Therefore, in this paper, the effects of thirty javamide analogues on p38 MAPK were investig...

An automated real-time method for determination of ISE steady state value and response time is developed, following most recent IUPAC recommendations. Specifically, detection of the 'steady state' is related to (1) the time derivative of the emf as it reaches a limiting value (ΔE/Δt(limit), e.g., 0.1-1.0 mV min(-1)) and (2) the duration of time for which the absolute value of the time derivativ...