Ultrasonic transducers play a significant role in generating and receiving the acoustic waves in ultrasonic flowmeters. Depending on the required accuracy, the ultrasonic transducers can be installed either in one pair or more in an ultrasonic flowmeter. The main part of an ultrasonic transducer is its piezoceramic element. In this work, four piezoceramic elements with different diameter to thi...

The ultrasonic relaxation of tellurite glasses xB2O3 – 70 TeO2 (30 x) WO3, 0 ≤ x 30 mol% was investigated by measuring the attenuation (αL) in these thermal range 140–300 K (T) at various frequencies (f). Some characteristics can be obtained from relation αL–T, such as average activation energy (Ep) and attempt frequency (f0). variables Ep f0 are a function B2O3 content. Moreover, αL–T accounts...

Introduction This in vitro study was designed to evaluate and compare different endodontic irrigation and activation systems for removal of the intracanal smear layer. Methods and Materials Forty recently extracted, non-carious human intact single rooted premolars were selected and divided into five groups (n=10) according to the root canal irrigation systems; syringe and needle irrigation (C...

The introduction of toxic chemicals into the environment can result in water pollution leading to degradation biodiversity as well human health. This study presents a new approach using metal oxides (Al2O3 and SiO2) modified with plasmonic (silver, Ag) nanoparticles (NPs)-based nanofluid (NF) formulation for environmental remediation purposes. Firstly, we prepared Al2O3 SiO2 NFs different conce...

background and objectives: because of toxical and hazardous properties of hexavalent chromium (cr(vi)), its removal by an economical and efficient method is necessary. the use of activated carbon, as an adsorbent, is a common and effective method for hexavalent chromium removal. thus the aim of this study was to produce granular and powdered activated carbon form peganum harmala and compare the...

Based on a package of modern analysis methods, the influence various acids and energy effects morphology, elemental composition, structural chemical transformations mineral surface, efficiency eudialyte concentrate leaching was studied. The mechanism optimal conditions specific features destruction rock minerals extraction zirconium REE under acids, powerful nanosecond pulses, dielectric barrie...

Ultrasonic testing systems have been extensively used in medical imaging and non-destructive testing applications. Generally, these systems aim at a particular application or target material. To make these systems portable and more adaptable to the test environments, this study presents a reconfigurable ultrasonic testing system (RUTS), which possesses dynamic reconfiguration capabilities. RUTS...