the waste tyres represent a source of energy and valuable hydrocarbon products. waste tyres were pyrolysed catalytically in a batch reactor under atmospheric pressure. the effects of basic catalysts (mgo and caco3) were studied on the pyrolysis products. the distribution ratio of gas, liquid and char with mgo and caco3 were 24.4:39.8:35.8 wt % and 32.5:32.2:35.2 wt % respectively at 350°c for 2...

in this study, we aimed to investigate the peripheral antinociception effects of specificphosphodiesterase 5 (pde-5) inhibitor vardenafil on carrageenan-induced nociception in rats,and the role of calcium besides the l-arginine- nitric oxide (no)- cyclic guanosine monophophate(cgmp) pathway in these effects. hyperalgesia was induced by the intraplantar injection of 0.1ml fresh carrageenan solut...

the nanopowders of sno2, casno3 and ca2sno4 in the size rang of 5-70 nm have been prepared using solid-state reaction technique. the technique is convenient and inexpensive in comparison to the conventional routes of compound prepared and processing where, many steps of mixing and annealing are involved. formation of resultant compounds was explained on the basis of reaction taken place between...

Research in plant disease management focuses on developing safe methods for humans and the environment in order to prevent the entry of harmful chemicals in food. Simple inorganic salts have low cost and are safe enough to be used as pesticides. Phytophthora genus causes crown and root rot (gummosis) in crops and leads to great losses in some pistachio (Pistacia vera L.) produ...

Polyvinyl alcohol and calcium oxide composites appeared by casting technique. The calcium oxide added to polyvinyl alcohol with different weight percentages are (0,1,2 and 3) wt.%. Results showed that the absorbance increases with increase the weight percentage of calcium oxide. The absorption coefficient, extinction coefficient, refractive index and real and imaginary parts of dielectric const...

A unique process for regenerating calcium-based sorbents which are in the form of calcium sulfide was demonstrated by employing thermogravimetric analysis (TGA). The process converts calcium sulfide to calcium oxide by subjecting particles of the material to repeated cycles of oxidation and reduction at temperatures between 950 and 1100 °C. During each cycle a small portion of material is first...

There is indirect, contradictory evidence both for increased and reduced synthesis of the endothelium-derived vasodilator, nitric oxide, in the pulmonary circulation during acute hypoxia. Therefore, we decided to directly measure the effect of acute hypoxia on nitric oxide production by cultured pulmonary endothelium. Because increases in the intracellular free calcium concentration are known t...

This study included the application of some experiments in chemical treatment heavy metals elements by preparing biological surfaces that are adsorbed from natural and other substances, as activated carbon prepared charred pistachio shell with concentrated H2SO4 Nano-Calcium Oxide CaCL2.2H2O NaOH . The materials were diagnosed spectral techniques where FTIR infrared spectrum proved formation ca...