Flowing afterglow

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WebJul 1, 1995 · @article{osti_223681, title = {Kinetics of chemical reactions of methane in the flowing afterglow of a dinitrogen microwave plasma}, author = {Legrand, J C and Diamy, A M and Hrach, R}, abstractNote = {The reaction of methane in the afterglow is studied by combination of computer experiments and direct measurements. Methane conversion is … WebMay 4, 2006 · We present the optimization of a sterilization process with a N 2 flowing afterglow post-discharge. First we study the inactivation of bacteria (E. coli) submitted to the post-discharge, and discuss the mechanisms of bacteria inactivation. Then we evaluate the volume repartition of the active species (N atoms produced by plasma discharge) in ...

Optical and spectroscopic study of a supersonic flowing helium

WebHere, the atmospheric-pressure glow discharge (APGD) and afterglow of a helium flowing atmospheric-pressure afterglow (FAPA) ionization source were examined by optical … WebNov 1, 1994 · @article{osti_6937332, title = {Langmuir-probe measurements in flowing-afterglow plasmas}, author = {Johnsen, R and Shun'ko, E V and Gougousi, T and Golde, M F}, abstractNote = {The validity of the orbital-motion theory for cylindrical Langmuir probes immersed in flowing-afterglow plasmas is investigated experimentally. It is found that … dutch ships in a calm sea

A flowing afterglow study of water vapour - Faraday Discussions …

WebFlowing afterglow mass spectrometry, FA-MS, is a sensitive and quantitative mass spectrometry analytical approach that offers a route to on-line, real-time deuterium abundance measurements in water vapour in breath and above aqueous liquids, including urine and serum. This method involves the production and flow of thermalised hydrated … WebFeb 1, 2015 · The flowing afterglow technique incorporates several valuable features that allowed it to revolutionize studies of ion chemistry: (1) The quadrupole mass filter provides definitive identification of the reactant and product ions. (2) The ion formation and reaction regions are spatially and temporally separated. The reactant ions are ... WebA flowing afterglow system has been used to measure the gas-phase, thermal-energy rate constants for reactions between a variety of ions and water-vapour molecules at 300K. A method of measuring water-vapour flow-rates has been developed which may be readily extended to other vapours. Rate constants, together with in a database rows are also called

Flowing afterglow studies of the electron affinity of SO2

Inactivation of Escherichia coli in the flowing afterglow of …

WebThe bridge serves as a silent witness to the ebb and flow..." Trung on Instagram: "Capturing the essence of the blue hour. The bridge serves as a silent witness to the ebb and flow of life, as people make their way back to the warmth of their homes after work. WebJanča J, Tálský A, Krčma F, Hochard L and Ricard A (1994) CN chemiluminescence in N2 + CH4 Flowing afterglow at low temperatures, Plasma Chemistry and Plasma Processing, 10.1007/BF01447078, 14:3, ... Thrush B (1968) Atom Reactions in Discharge-Flow Systems Chemische Elementarprozesse, ... dutch shipyardFlowing-afterglow mass spectrometry (FA-MS), is an analytical chemistry technique for the sensitive detection of trace gases. Trace gas molecules are ionized by the production and flow of thermalized hydrated hydronium cluster ions in a plasma afterglow of helium or argon carrier gas along a flow tube … See more Over the years many variations of the instrument have been made. In the beginning during the 1960s there was the study of flowing afterglow plasma. This study was done by Eldon Ferguson, Art Schmeltekopf and … See more Trace gas analysis One of the first papers reporting the use of the flowing afterglow studied ion-molecule reactions pertinent to the Martian atmosphere. This flowing afterglow technique replaced the then standard stationary afterglow … See more • Charles H. DePuy (chemist) • Robert R. Squires See more dutch shipyard furniture

"WebApr 13, 2024 · The afterglow of NaLuF 4:Tb@NaYF 4 nanoscintillators persisted for more than 30 d after the X-rays were turned off (Supplementary Table 1 and Video 1). Notably, the afterglow can be used as a self ... " - Flowing afterglow

Flowing afterglow

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WebJan 1, 1975 · THE BASIC FLOWING AFTERGLOW A simplified schematic diagram of the basic flowing afterglow is shown. in Fig. 1. The principle of operation is quite simple. A … WebJul 27, 2024 · Here, a reactive flowing atmospheric-pressure afterglow (reactive-FAPA) AMS source is developed for rapid isomer differentiation by derivatization of analytes in real time. The effects of the reactive-FAPA operating conditions on the reagent and product ions were studied and optimized for highly volatile and non-volatile model compounds with ...

WebJun 8, 2024 · Flowing atmospheric-pressure afterglow plasma gas flow rate The signal dependence on the plasma gas flow rate was also studied ( Fig. 3 b). Regarding the gas-phase analyte injection, 2,6-DTBP, there is a considerable increase (around 11 times) in signal intensity as the plasma gas flow rate rises from 100 to 300 mL min −1 , that is … WebThe synthesis and characterization of carbene, nitrene, carbyne and biradical negative ions were studied using the flowing afterglow-triple quadrupole apparatus. These include the negative ions of phenylcarbene, 3-ethoxyphenylnitrene, phenylcarbyne and 2,4-dimethylenecyclobutane-1,3-diyl, respectively. Various experimental gas-phase acidities, …

WebApr 1, 2004 · Gas-phase reactions of nitromethane (1), nitroethane (2), 2-nitropropane (3), 2-methyl-2-nitropropane (4) and nitrocyclopropane (5) were studied at 300 K using the … WebPublisher Summary. This chapter describes the experimental and analytical techniques that have been developed for flowing afterglow applications to the quantitative study of …

WebAug 31, 1998 · Flowing afterglow and selected ion flow tube studies of thermal energy electron transfer reactions of sulfur dioxide provide a bracket of the electron affinity of SO 2: 0.744 eV

WebApr 20, 2024 · Other plasma-based ADI sources such as the flowing atmospheric-pressure afterglow (FAPA) source were used in TLC-ADI-MS studies as well [24, 25]. One advantage of plasma-based ADI sources compared to spray-based sources is the absence of additional solvent and solvent vapor, thus, minimizing analyte diffusion and … in a dark place we find ourselves yodaWebApr 20, 2024 · We describe the plasma chemistry in a helium flowing atmospheric pressure afterglow (FAPA) used for analytical spectrometry, by means of a quasi-one … dutch shipwrecks western australiaWebJun 28, 2000 · The flowing afterglow of a microwave discharge can be used to efficiently inactivate bacterial spores. We have conducted a parametric study of the operating conditions of such a system, which shows that the species participating in the killing of spores are oxygen atoms and ultraviolet (UV) photons. The oxygen atoms and the … in a darkened room bandWebFlowing afterglow mass spectrometry, FA-MS, is a sensitive and quantitative mass spectrometry analytical approach that offers a route to on-line, real-time deuterium abundance measurements in water vapour in breath and above aqueous liquids, including urine and serum. This method involves the production and flow of thermalised hydrated … dutch shiplap sidingWebThe flowing afterglow has many attractive aspects: well-understood laminar behavior, viscous gas flow, a large density of carrier gas which allows the study of thermalized … in a dark time by theodore roethkeWebAbstract. The experimental technology of the flowing afterglow technique, including data analysis procedures, has very recently been described in great detail. (1) The present … in a database columns are also calledWebadshelp[at]cfa.harvard.edu The ADS is operated by the Smithsonian Astrophysical Observatory under NASA Cooperative Agreement NNX16AC86A dutch shipyard shelving