Now showing items 1-10 of 1738
Ultrasonic characterization of emulsions: milk and water in oil
Measurements of ultrasonic attenuation and velocity in milk and low concentration water-in-oil (W/O) emulsion were conducted, using a measurement cell with a double-element transducer that eliminates diffraction losses. ...
Evaluation of Ultrasonic and ErCr:YSGG Laser Retrograde Cavity Preparation
(Elsevier B.V., 2009-05-01)
Root end cavity preparation techniques aim to create a clean and properly shaped cavity in a short time. Although the use of ultrasonics has been widely recommended, a laser can also be used. This study evaluated the time ...
Stress evaluation of railroad forged wheels by ultrasonic testing
(Amer Soc Testing MaterialsW ConshohockenEUA, 2007)
Effect of the Etching Duration and Ultrasonic Cleaning on Microtensile Bond Strength Between Feldspathic Ceramic and Resin Cement
(Taylor & Francis Ltd, 2013-03-01)
This study assessed the effect of different etching durations of feldspathic ceramic with hydrofluoric acid (HF) and ultrasonic cleaning of the etched ceramic surface on the microtensile bond strength stability of resin ...
Sparse arrays and image compounding techniques for non-destructive testing using guided acoustic waves
Piezoelectric array transducers applications are becoming usual in the ultrasonic non-destructive testing area. However, the number of elements can increase the system complexity, due to the necessity of multichannel ...
Thermal characterization of an ultrasonic density-measurement cell
(Institute of Electrical and Electronics Engineers (IEEE), 2007-06-01)
An ultrasonic density-measurement cell is experimentally characterized as a function of temperature. The measurement of propagation velocity and density of several liquids is performed in the 15 degrees C-40 degrees C ...
Post space debridement in oval-shaped canals: The use of a new ultrasonic tip with oval section
(ELSEVIER SCIENCE INC, 2008)
This study evaluates the effect on post space debridement in oval-shaped canals of an experimental ultrasonic tip with oval section (Satelec) compared with a circular ultrasonic tip (KaVo). Thirty teeth with an oval-shaped ...
Influence of ultrasonic setting on compressive and diametral tensile strengths of glass ionomer cements
(ABM, ABC, ABPol, 2008)
The aim of this study was to assess the influence of ultrasonic wave propagation on the compressive (CS) and diametral tensile (DTS) strengths of glass ionomer cements (GICs). Three variables were evaluated: conventional ...