Introduction: The development of an effective method regarding chromium removal from the environment is of great importance. Therefore, the present study aimed to examiner magnetic nanoparticles coated with alumina modified by Cetyl Trimethyl Ammonium Bromide (CTAB) in the removal of Cr6+ through magnetic solid phase extraction method. Materials & Methods: At first, iron oxide nanoparticles ...

introduction: failures might occur at metal‒porcelain interfaces as a problem with metal‒ceramic restorations even with the application of airborne-particle abrasion technique. this study was undertaken to evaluate the effect of nd:yag laser treatment on the bond strength of porcelain fused to metal. methods:  twenty-four cylindrical specimens (4 mm in diameter and 4 mm in height) were made of ...

Two series of chromium–zirconium mixed oxide catalysts with different Cr/Zr molar ratio are prepared by co-precipitation method. Porous structure the is studied low-temperature N2 adsorption–desorption. Phase composition and chromium states in characterized X-ray diffraction (XRD), UV-visible spectroscopy, temperature-programmed reduction hydrogen (TPR-H2). The tested non-oxidative dehydrogenat...