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Olsen, K.B.; Griffin, J.W.; Matson, B.S.; Kiefer, T.C.; Flynn, C.J.
Pacific Northwest Lab., Richland, WA (USA)1990
Pacific Northwest Lab., Richland, WA (USA)1990
AbstractAbstract
[en] A radio frequency induced helium plasma (RFIHP) detector was designed and tested as a sensor for volatile chlorinated compounds. The RFIHP detector uses a critical orifice air inlet and an RF-excited sub-atmospheric pressure helium plasma to excite the ambient air sample. The excitation source is coupled to a fiber-optic cable and associated collection optics to monitor the emission intensity of the 837.6-nm emission line of chlorine. The RFIHP detector demonstrated linearity from 0 to 500 ppMv carbon tetrachloride with a correlation coefficient of 0.996 and excellent reproducibility. The detection limit for carbon tetrachloride in air was 5 ppMv. Fluorinated compounds can also be readily analyzed by changing the analytical wavelength to 739.9 nm. 10 refs., 9 figs
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Apr 1990; 17 p; 199. national meeting of the American Ceramic Society; Boston, MA (USA); 22-27 Apr 1990; CONF-900402--9; CONTRACT AC06-76RL01830; NTIS, PC A03/MF A01 as DE90016296; OSTI; INIS; US Govt. Printing Office Dep
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Report
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Conference
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INIS IssueINIS Issue
Ross, Ian; Hurst, Jake; Miles, Jonathan; McDonough, Jeffrey; Burdick, Jeff; Houtz, Erika, E-mail: ian.ross@arcadis.com
Proceedings of the 7th International Contaminated Site Remediation Conference2017
Proceedings of the 7th International Contaminated Site Remediation Conference2017
AbstractAbstract
[en] Poly- and Perfluoroalkyl substances (PFAS) are used in a wide range of industrial applications and commercial products due to their unique surface tension and levelling properties. PFAS are also major components of firefighting foams such as Aqueous Film Forming Foam (AFFF) and fluoroprotein foams (including FP and FFFP). The PFAS group of compounds consists of both perfluorinated compounds or perfluoroalkyl acids (PFAAs), where all carbons are saturated with F atoms, and polyfluorinated compounds, where both fluorine saturated carbons and carbons with hydrogen bonds are present. Polyfluorinated “precursor” compounds biotransform to produce PFAAs as dead end extremely persistent daughter products. The understanding of the fate and transport of these compounds in the environment is complex and challenging and will be discussed. The concepts of in situ generation of perfluroalkyl acids (PFAAs) via precursor biotransformation will be used to explain how significant PFAS mass remains hidden in source areas in an analogous manner to NAPL residuals for hydrocarbon or chlorinated solvents. (author)
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Cooperative Research Centre for Contamination Assessment and Remediation of the Environment (CRC CARE), Newcastle University, Callaghan, NSW (Australia); 633 p; ISBN 978-1-921431-58-6;
; Sep 2017; p. 120-121; CleanUp 2017: 7. International Contaminated Site Remediation Conference; Melbourne, VIC (Australia); 10-14 Sep 2017; Also available from CRC CARE, C/- Newcastle University LPO, Callaghan, NSW 2308, Australia; online from: http://www.cleanupconference.com/wp-content/uploads/2018/12/CleanUp_2017_Proceedings_small.pdf

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AbstractAbstract
[en] The effect of Organo-Chlorine Compounds (OCC) on the radiation structuring of SKN-40 was investigated in filled model systems with 5 mass. h. of ZnO.The content of gel was determined at various dosages of OCC after irradiation with doses from 5 to 40 MRad. With increasing dosages of OCC, it takes part in the formation of rubber. After radiation exposure, the optimal conditions for the content of gel systems are 62-65%, and the activity in the processes of radiation structuring of OCC is located in the same row that was composed of the composition of the heating. The effective concentration of cross-links at optimal dosages of OCC (n'e 10''-''1''9, cm''-''3) in the optimum vulcanization constitute model systems with HCCP-5,3, adduct 1-5,3, adduct 2-6,3, adduct 3-6,5. In the presence of OCC, the optimal dose of radiation is reduced, so they can be considered as sensitizers of radiation structuring. Thus, it was found that the investigated OCC are effective structuring agents for SKN-40 both during heating and exposure to λ irradiation.
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1 fig.; 2 tabs.; 5 refs.
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Journal Article
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Journal of Radiation Researches; ISSN 2312-3001;
; v. 6(1); p. 65-69

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AbstractAbstract
No abstract available
Original Title
Sistema dosimetrico a base de clorobenceno
Source
18. Mexican Congress of Pure and Applied Chemistry; Coatzacoalcos (Mexico); 11-15 Oct 1983; Published in summary form only.
Record Type
Journal Article
Literature Type
Conference
Journal
Revista de la Sociedad Quimica de Mexico; ISSN 0583-7693;
; v. 27(5); p. 291

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INIS VolumeINIS Volume
INIS IssueINIS Issue
Gehringer, P.; Proksch, E.; Szinovatz, W.
Oesterreichisches Forschungszentrum Seibersdorf G.m.b.H1984
Oesterreichisches Forschungszentrum Seibersdorf G.m.b.H1984
AbstractAbstract
[en] The γ-radiation degradation of trace amounts (70-440 ppb) of trichloroethylene and tetrachloroethylene in drinking water has been investigated. The doses necessary to reduce the pollutant concentration to 1 ppb are in the order of 1kGy. (Author)
Source
Oct 1984; 6 p; CH--336/84
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Report
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AbstractAbstract
[en] The cross sections for dissociative attachment in the chlorosilanes and chloromethanes for electrons in the energy range 0.2--5.0 eV have been measured. In addition, measurements of the total electron scattering cross sections of the chloromethanes in the 0.2--12.0 eV range are reported. It is observed that dissociative attachment is much more probable in the chloromethanes than the chlorosilanes. This is explained by quantum mechanical calculations which reveal qualitative differences in the nature of the electron--molecule complex for the silanes as compared to the methanes
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AbstractAbstract
No abstract available
Original Title
Kernquadrupol Resonanzspektroskopie
Source
10 figs.; 6 tabs.
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Journal Article
Journal
Physik in Unserer Zeit; v. 3(1); p. 17-24
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AbstractAbstract
[en] Reaction of recoil 38Cl atoms with o-dichlorobenzene in the presence of carbon tetrachloride or iodine has been studied by using radio-high performance liquid chromatography. The major products were detected by a 4-channel-wavelengths spectrophotometric detector. The radioactivity of 38Cl compounds including minor products was measured with a NaI(Tl) scintillation detector. The main products found were 38Cl labeled HCl/Cl2, CHCl3, CCl4, o-, p-, m-C6H6Cl2 and polymer,, whereas only miner products such as HCl/CR2, C2,Cl6, C6H3Cl3, and polymer were found in the radio-chromatogram. The reaction mechanisms of recoil 38Cl atom are briefly described. (author) 9 refs.; 5 figs.; 3 tabs
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Journal Article
Journal
Journal of Radioanalytical and Nuclear Chemistry; ISSN 0236-5731;
; CODEN JRNCDM; v. 166(4); p. 287-297

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BETA DECAY RADIOISOTOPES, BETA-MINUS DECAY RADIOISOTOPES, CHEMISTRY, CHLORINE ISOTOPES, CHROMATOGRAPHY, HALOGEN COMPOUNDS, ISOMERIC TRANSITION ISOTOPES, ISOTOPES, LIGHT NUCLEI, MINUTES LIVING RADIOISOTOPES, NUCLEI, ODD-ODD NUCLEI, ORGANIC COMPOUNDS, ORGANIC HALOGEN COMPOUNDS, RADIOCHEMISTRY, RADIOISOTOPES, SECONDS LIVING RADIOISOTOPES, SEPARATION PROCESSES
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AbstractAbstract
[en] The stereochemistry of high energy chlorine-for-chlorine substitution was studied in gaseous and condensed phase 2(S)-chloropropionyl chloride and 2(R)-chloropropionyl chloride. Greater than 80% inversion of configuration was observed at the chiral center for both high energy 38Cl and /sup 34m/Cl substitution. Net retention is observed in gaseous 2(S)-chloro-4-methylvaleryl chloride where steric hindrance to backside attack is enhanced relative to 2(S)-chloropropionyl chloride. Condensed state data suggest caged radical recombination reactions. 2 tables
Original Title
Walden inversion
Record Type
Journal Article
Journal
Journal of Physical Chemistry; ISSN 0022-3654;
; v. 83(10); p. 1237-1241

Country of publication
BETA DECAY RADIOISOTOPES, BETA-MINUS DECAY RADIOISOTOPES, BETA-PLUS DECAY RADIOISOTOPES, CHEMISTRY, CHLORINE ISOTOPES, HALOGEN COMPOUNDS, ISOMERIC TRANSITION ISOTOPES, ISOTOPES, LIGHT NUCLEI, MINUTES LIVING RADIOISOTOPES, NUCLEI, ODD-ODD NUCLEI, ORGANIC COMPOUNDS, ORGANIC HALOGEN COMPOUNDS, RADIOCHEMISTRY, RADIOISOTOPES, SECONDS LIVING RADIOISOTOPES
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AbstractAbstract
[en] The technique of pulse radiolysis was used to study the reactions of the hydrated electron and H atom in aqueous media with platinum(II) amine complex ions; chloro(diethylenetriamine)platinum(II), chloro(1,1,7,7-tetraethyldiethylenetriamine)platinum(II) and bis(ethylenediamine)platinum(II). The second-order rate constants for these reactions are near 1 x 1010dm3mol-1s-1, and the products absorb in the region of 240 to 450 nm. A comparison of the spectral and kinetic properties of the transients indicates that the esub(aq)sup(-) and H atom reaction products are different. The reactions of Cl2- with these complexes and with PtCl42- occur rapidly (second-order rate constants greater than 1 x 108dm3mol-1s-1) to yield transients absorbing strongly in the region of 230 to 400 nm. Very similar products are formed through the reactions of trans-dichlorobis(ethylenediamine)platinum(IV) ion with esub(aq)sup(-), H atom, methanol and isopropanol radicals; the associated rate constants range from 6.9 to 108dm3mol-1s-1 for methanol radical to 6.6 x 1010dm3mol-1s-1 for esub(aq)sup(-). Evidence is presented to show that these transients are platinum(III) species. Their possible structures and substitutional labilities are discussed. (author)
Record Type
Journal Article
Journal
International Journal for Radiation Physics and Chemistry; v. 7(6); p. 693-704
Country of publication
CHARGED PARTICLES, CHEMICAL RADIATION EFFECTS, CHEMICAL REACTIONS, COMPLEXES, DECOMPOSITION, ELECTRONS, ELEMENTARY PARTICLES, ELEMENTS, FERMIONS, HALOGEN COMPOUNDS, IONS, KINETICS, LEPTONS, NONMETALS, ORGANIC COMPOUNDS, ORGANIC HALOGEN COMPOUNDS, RADIATION EFFECTS, REACTION KINETICS, SOLVATION, TRANSITION ELEMENT COMPLEXES
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