In the present study, amorphous tricalcium phosphate (TCP) has been synthetized by a wet route to obtain low temperature ?-TCP at 650 °C (LT-?TCP) and compare its structural, physical–chemical thermal properties with those of obtained conventional solid-state reaction method 1400 (HT-?TCP). Even if no significant differences were observed concerning values lattice parameters measured Rietveld r...

We study free particle motion on homogeneous kinematical spacetimes of galilean type. The three well-known cases Galilei and (A)dS–Galilei are included in our analysis, but focus will be the previously unexplored torsional spacetimes. show how well-chosen coordinates becomes equivalent to dynamics a damped harmonic oscillator, with damping set by torsion. realization symmetry algebra terms cons...

PURPOSE To evaluate corneal changes after collagen crosslinking (CXL) therapy for keratoconus (KCN) using the Galilei dual Scheimpflug analyzer. METHODS This prospective, nonrandomized clinical study included 35 eyes of 32 keratoconus patients who had undergone CXL. The eyes were saturated with riboflavin solution and were subjected for 30 minutes to ultraviolet-A (UV-A) light with irradiance...

PURPOSE To compare the corneal power measurements obtained using different topographic instruments after myopic photorefractive keratectomy (PRK). METHODS Patients with myopia who were candidates for corneal refractive surgery were sequentially included. Pre-PRK and six months post-PRK corneal powers were measured using Javal manual keratometer, Orbscan II, Galilei, Tomey TMS4, and EyeSys 200...