The self-recombination of the methylene amidogen radical (H(2)CN) is known to be fast and should play an important role in determining the concentration of H(2)CN radicals in both combustion and astrophysical processes. The rate constants of H(2)CN + H(2)CN have been determined by previous experiments, whereas its detailed evolution process and product distribution are still unclear. In this wo...

This work reports the first 1D, simultaneous, laser-induced fluorescence (LIF) measurements of amidogen (NH2) radical concentration and Raman/Rayleigh major species temperature in laminar counterflow non-premixed premixed NH3/H2/N2–air flames. The instrument presents a novel excitation scheme for NH2, which add no complexity to existing instrument. NH2 LIF is excited by three Nd:YAG lasers, tem...

antioxidants are vital substances which possess the ability to protect the body from damage caused by free radical induced oxidative stress. a variety of free radical scavenging antioxidants exist within the body which many of them are derived from dietary sources like fruits, vegetables and teas. in this study the antioxidant activity and radical scavenging activity of methanolic extracts of s...

A scheme for NH2 detection by means of laser-induced fluorescence (LIF) with excitation in the ultraviolet-blue regime around 385 nm, in particular using the second harmonic of a solid-state Alexandrite laser, is presented. This alternative provides interference-free detection with improved signal compared with previously employed concepts based on Nd:YAG and dye-laser excitation in the visible...

Nitrosamine formation has been associated with wastewater-impacted waters, but specific precursors within wastewater effluents have not been identified. Experiments indicated that nitrosamines form in low yields from quaternary amines, and that the nitrosamines form from the quaternary amines themselves, not just lower order amine impurities. Polymeric and benzylated quaternary amines were more...

s, edited by J. Kistermaker sNorth-Holland, Amsterdam, 1971d, p. 422. f39g Buckbee-Mears Co., Minneapolis, MN. f40g Z. Amitay and D. Zajfman, Rev. Sci. Instrum. 68, 1387 THREE-BODY FRAGMENTATION DYNAMICS OF... PHYSICAL REVIEW A 71, 032711 s2005d