nickel hydroxide nanostructures were synthesized by a hydrothermal reaction. the effect of different precursors and surfactants on the morphology of nickel hydroxide nanostructures was investigated. nanostructures were characterized by x-ray diffraction, energy dispersive x-ray spectroscopy, scanning electron microscopy and fourier transform infrared  spectroscopy. the influence of ni(oh)2 nano...

A weakly nonlinear parabolic equation pertinent to the flame front dynamics subject to the buoyancy effect, and to a statistical description of biological evolution is considered. In the context of combustion it is shown that the parabolic interface occurring in upward propagating flames in vertical channels may actually be merely quasi-equilibrium transient states which eventually collapse to ...

A novel methodology based on principal component analysis (PCA) was developed for the identification of the low-dimensional manifold of a chemical reacting system, the determination of its dimensionality and the selection of optimal manifold variables. Results are presented for a simple CO/H2/N2 jet flame and for a CH4 piloted flame (TNF Flame F). Results of the global PCA analysis (GPCA) on th...

Flammability properties of plasma pretreated cotton fabrics subjected to flame-retardant treatment were studied. Plasma pretreatment, using an atmospheric pressure plasma jet (APPJ), was applied to cotton fabrics to enhance material properties, while retaining inherent advantages of the substrates. An organic phosphorus compound (flame-retardant agent, FR) together with a melamine resin (crossl...

Flame photometry has many applications, and in the clinical field its use in the estimation of serum sodium and potassium is now well established. Difficulties have been encountered in the estimation of serum calcium by flame photometry, since the emission spectrum of calcium is relatively weak and is subject to interference by the presence of other ions, e.g., sodium. Although many methods hav...

A computational investigation of high-pressure hydrogen–air partially premixed flames (PPFs) is reported to characterize the effect of pressure on the flame structure, and the relevance of reaction limits for these flames. The flames are computed using the Mueller mechanism consisting of 19 elementary reactions and 9 species. Although the mechanism has been validated during previous investigati...

the premixed counterflow flames propagation in combustion of mixture which is a uniform mixture of fuel particles and air is analytically studied. this analysis framework is based on thermal-diffusion model with assumption that the lewis number is unit and the strain rate is constant. velocity profile is assumed as a function of one variable like x. the structure of the flame is presumed to con...