The acid in the commonly used indol reagent described by Kovacs (1928, 1932) and Diagnostic Procedures and Reagents (1950) changes the reaction of the medium in which the indol production is tested and prevents the further observation of biochemical processes, killing the bacteria themselves. It was found that, by heating 0.1 ml. or less of culture (broth or peptone water), indol production by ...

Reduction of nitric oxides (NOx) in aircraft engines and in gas turbines by lean combustion is of great interest in the design of novel combustion systems. However, the stabilization of the flame under lean conditions is a main issue. In this context, the present work investigates the effects of sinusoidal dielectric barrier discharge (DBD) on a lean inverse diffusive methane/air flame in a Bun...

The predictions of turbulent burning velocity parameterizations for non-unity Lewis number flames have been assessed based on a single-step chemistry Direct Numerical Simulation (DNS) database premixed Bunsen different values characteristic numbers ranging from 0.34 to 1.2. It has found that the definition is strongly dependent choice projected flame brush area in burner configuration. highest ...

The main aim of this work is to manufacture a composite material based on natural (marble) with acceptable mechanical properties and fire resistance, for being used in habitat industry as floor or wall buildings. Marble raw the waste powder quarry plate manufacturing. To achieve objective, polyester matrix composites 50 wt.% marble 3 glass fiber (short mesh) were prepared. novelty study high pe...

Much of the discussion in the public domain relating to shockwave interaction with flames, and the use of high explosives to extinguish, for instance, oil and gas well fires, is anecdotal and outside of scientific literature. The result is a lack of consistent insight into the physical mechanisms involved. It has been proposed by several researchers that the shock waves and the strong vortex ri...

Abstract Simultaneous OH-PLIF and Mie scatter imaging were used to investigate turbulent premixed flame edge detection under a range of turbulence characteristics on stabilised piloted Bunsen burner. A 527 nm wavelength laser beam is generate scattering sheet at 500 Hz, 283 created using 355 pump an optical parametric oscillator induce florescence from OH radicals 5 Hz. phase-locking technique ...