The electrochemical reduction of oxygen on Lanthanum Manganite(LSM) electrodes has been investigated by cyclic voltammetry, AC impedance and, in particular, potential step. An emphasis was given to the study of the kinetics of the formation of oxygen vacancy, which is shown to be the main cause for the reserved hysteresis in cyclic voltammograms and for the increase in the electrochemical activ...

Thermoluminescence (TL) and photoluminescence (PL) properties of the Gd3+ doped lanthanum zirconium phosphor (La2Zr2O7:Gd3+) are reported in this work. La2Zr2O7 (LZO) has been p...

Fourteen cations were tested at a 1% concentration (wt:wt), as chlorides, for their effects on the biological activity of the gypsy moth, Lymantria dispar (L.), nuclear polyhedrosis virus (LdMNPV). Cupric chloride was toxic to gypsy moth larvae. Ferrous and ferric chloride were inhibitory to larval growth and development as well as to virus activity. Strontium chloride was inhibitory to virus a...

A series of Co doped lanthanum silicate apatite-type phases, La9.83Si4.5Co1.5O26, La9.66Si5CoO26, La10Si5CoO26.5 and La8BaCoSi6O26, have been synthesised, and neutron diffraction, EXAFS and XANES used to investigate their structures in detail. All compositions were shown to possess the hexagonal apatite structure, and the results confirmed that cobalt can be doped onto both the La and Si sites ...

Lanthanum-doped (La:(HfZr)O 2 ) nanometer films of a solid solution hafnium oxide and zirconium are great interest for the development universal memory that combines an unlimited number RAM reprogramming cycles nonvolatile flash memory. This work is devoted to studying cathodoluminescent properties La : HfZrO thin with different contents lanthanum. It shown cathodoluminescence spectra dominated...

We propose and demonstrate a stable, tunable and narrow linewidth C-band lanthanum co-doped bismuth based erbium doped fiber (EDF) ring laser with single longitudinal mode (SLM) operation. A free space thin film filter acts as a wavelength discriminative component selecting a few oscillating modes while a Lyot filter formed by a polarization maintaining (PM) fiber and a linear polarizer further...

This study investigated the effects of a new strontium-doped bioactive glass and fluoride on hydroxyapatite crystallization. We designed an in vitro experiment with calcium phosphate (CaCl2·2H2O + K2HPO4 buffer solution) different concentrations (1 mg/mL or 5 mg/mL), (0 ppm, 1 ppm ppm). Tris-buffered saline served as negative control. After incubation at 37 ? for 48 h, shape organization crysta...