• Spindle shaped PbWO 4 nanostructure with enhanced photocatalytic activity was obtained by facile and green sonochemical way for the first time. Maltose as a new capping agent utilized. Sonication time, dose of precursors, power ultrasound waves kind were optimized. The made lead tungstate samples in role visible-light photocatalyst applied to remove organic pollution water. Usage ultrasonic i...

Activation of the large conductance, Ca2+-dependent K+ channel [KCa1.1+b-subunits, generally known as the Big K (BK) or maxi K channel] is an important negative feedback on depolarization and Ca2+-induced contraction of smooth muscle and thus arterial vasoconstriction (Figure 1). Intriguingly, altered function of BK and/or polymorphism in human BK aand b-subunit genes have been associated with ...

Zirconium tungstate as an inorganic ion exchange material has been synthesized at different conditions. The materials were characterized by means infrared spectroscopy, thermo gravimetric analysis, and X-ray diffraction techniques. The stability of the ion exchangers was investigated in acidic and alkaline media. Ion exchange properties of synthesized materials were studied by measuring the dis...

In this paper, we present two approaches to synthesize nanostructured metal oxide semiconductors in a form of multi-layer thin films later assembled as conductometric gas-sensors. The first approach produces combination solid film tungsten trioxide (WO3) with nanoclusters cupric (CuO) prepared by magnetron-based gas aggregation cluster source (GAS). second method is two-step reactive magnetron ...

This paper reports experimental study on the development of cadmium tungstate scintillator material in the form of nanocrystal films through controlled sol–gel processing and pre-designed doping. We chose cadmium tungstate as a base material for doping and nanostructure development due to its excellent inherent photoluminescence (PL) property, and chemical and thermal stability including non-hy...

We demonstrate passive mode locking based on the novel monoclinic double tungstate crystal Yb:KLu(WO4)2. We report the shortest pulses ever produced with an Yb-doped tungstate laser using a semiconductor saturable absorber. A pulse duration of 81 fs has been achieved for an average power of 70 mW at 1046 nm. We compare the performance of the polarization oriented parallel to the Nm- and Np-crys...

Mode locking based on an epitaxial composite of the monoclinic double tungstate crystal Yb:KLu(WO4)2 is realized. A 100 microm thin Yb:KLu(WO4)2 layer grown on a KLu(WO4)2 substrate is used as an active medium in a laser passively mode locked by a semiconductor saturable absorber. Pulse durations of 114 fs have been achieved for an average power of 31 mW at 1030 nm. Results in the femtosecond a...

This study is focused on the composition and the evolution of tungstate ions solutions as a function of pH and increasing concentrations. The Raman analysis showed that, during the titration of the tungstate solutions, WO4(2-), HWO4- ions and probably W2O7(2-) , HW2O7(2-) and H2W2O7 solvated species could exist in aqueous solutions. For diluted solutions, additions of a strong acid does not cau...

In this study, the effect of sodium tungstate on anaerobic digestion waste sewage sludge (WSS) was investigated. Methane production enhanced by in a dose-dependent manner. Sodium did not affect hydrolysis stage as same level protease activity detected WSS sample with or without tungstate. At acidogenesis stage, concentration acetate decreased during supplemented whereas that isobutyrate increas...