resonance light scattering (rls) intensity of silver nanoparticles in the presence of sodium dodecylsulphate was quenched on addition of sulfasalzine. the quenching extent was shown to be proportional to the sulfasalazine concentration. effect of different parameters such as ph, volume and kind of buffer, silver nanoparticles concentration, sodium dodecylsulphate (sds) concentration, and waitin...

In this investigation the fluorescence quenching of fluorescent probe molecules situated within surfactant micelles was examined. The hydrophobic polyaromatic hydrocarbon benzo(a)pyrene (B(a)P) and the more polar 6-propionyl-2-(dimethylamino)-naphthalene (PRODAN) were used to assess the effect of high quencher concentration on the quenching process in micelles. Using the surfactant systems sodi...

Aqueous polymer quenchants are being used increasingly in steel heat treatment industries as a substitution for conventional quenchants. By adjusting the quench parameters of the polymeric media, it is possible to achieve desirable microstructure and mechanical properties in addition to reduction in distortion and cracking. In this work, Polyalkylene Glycol (PAG) aqueous solution was used as th...

Nonphotochemical quenching (NPQ) of excitation energy is a well-established phenomenon in green plants, where it serves to protect the photosynthetic apparatus from photodamage under excess illumination. The induction of NPQ involves a change in the function of the light-harvesting apparatus, with the formation of quenching centers that convert excitation energy into heat. Recently, a comparabl...

We develop a simple yet comprehensive method to distinguish the underlying drivers of galaxy quenching, using the clustering and galaxy-galaxy lensing of red and blue galaxies in SDSS. Building on the iHOD framework developed by Zu & Mandelbaum (2015), we consider two quenching scenarios: 1) a“halo”quenching model in which halo mass is the sole driver for turning off star formation in both cent...

In this paper we study the quenching problem for the non-local diffusion equation ut(x, t) = ∫ Ω J(x− y)u(y, t) dy + ∫ RN\Ω J(x− y) dy − u(x, t)− λu−p(x, t). We prove that there exits a critical parameter λ∗ such that for all λ > λ∗ every solution quenches and for λ ≤ λ∗ there are both global and quenching solutions. For the quenching solutions we study the quenching rate and the quenching set....