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  • 1
    Electronic Resource
    Electronic Resource
    Method for the determination of thorium and uranium in urine by ICP-MS (1997)
    Springer
    Microchimica acta 126 (1997), S. 263-266 
    Details
    ISSN: 1436-5073
    Keywords: ICP-MS ; thorium ; uranium ; urine ; body-fluid ; trace elements
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract ICP-MS (inductively coupled plasma mass spectrometry) is shown as a very sensitive method for quantitative determination of Th and U concentration and excretion analysis in urine without any sample pretreatment. The current standard method for incorporation monitoring applies alpha-spectrometry, a very tedious and time consuming technique. ICP-MS offers an attractive alternative for monitoring of thorium and uranium body burdens in occupationally exposed subjects and also larger groups of the general population. A limit of determination of 0.5 ng/L in aqueous solutions and 1 ng/L in urine samples for both elements was achieved, with a precision of about ± 10% in the concentration range of appr. 10 ng/L. Due to the lack of a suitable reference material, the accuracy of the method was tested by comparing some of the results with those obtained by α-spectrometry, especially for U. There was a sufficient agreement on both results.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01242331
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  • 2
    Electronic Resource
    Electronic Resource
    High-temperature kinetics of Si-containing precursors for ceramic processing (1997)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 43 (1997), S. 2670-2678 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Experimental investigations of high-temperature kinetics of Si-precursor molecules relevant to CVD and ceramic processing are described. Reaction systems using SiH4, Si2H6, and SiCl4 highly diluted in argon were studied in a shock tube, a high-temperature wave reactor, by monitoring in situ the concentrations of atomic or radical reactants Si, H, Cl, SiH, and SiH2. Because of the very high dilution, the measured properties are sensitive to a limited number of elementary reactions, allowing a relatively direct determination of the respective rate coefficients. Both thermal pyrolysis and laser flash photolysis methods were used to expand the investigated temperature range. An overview of the bimolecular Si-atom reactions is given.
    Additional Material: 16 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690431311
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  • 3
    Electronic Resource
    Electronic Resource
    Corrosion-resistant special steels for flue gas desulphurisation plants (1992)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 43 (1992), S. 275-279 
    Details
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Korrosionsbeständige Sonderstähle für Rauchgas-EntschwefelungsanlagenEine Rauchgas-Entschwefelungsanlage ist im Grunde eine chemische Fabrik, die in Kraftwerke integriert wurde. Deshalb hat man auf Werkstoffe zurückgegriffen, die sich in der chemischen Industrie bewährt haben. Nichtrostende Stähle mit hohem Legierungsgehalt sind eine gute Wahl und bieten Vorteile wie gute Korrosionsbeständigkeit, thermische Stabilität, Schweißbarkeit und einfache Oberflächenkontrolle. Von Bedeutung sind die Legierungselemente Molybdän und Stickstoff. Für die Anwendung in REA's ist abhängig vom Grad der Korrosionbeanspruchung eine Reihe von Stählen entwickelt oder modifiziert worden.Ein neuer hochlegierter Stahl wird beschrieben, zusammen mit Hinweisen für die schweißtechnische Verarbeitung.
    Notes: A Flue Gas Desulphurisation system is a chemical plant-using materials which have proven their reliability in the chemical industry. Stainless steels with high alloy contents are a good choice, offering advantages such as corrosion resistance, thermal stability, weldability and easy access for inspection.Of importance are the alloying elements molybdenum and nitrogen. A number of steel grades have been developed or modified specially for FGD systems, depending on the corrosive environment.A new high alloyed steel is described, along with recommendations for welding.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19920430605
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  • 4
    Electronic Resource
    Electronic Resource
    Surface-enhanced raman scattering from poly(4-vinyl pyridine) (1987)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part B: Polymer Physics 25 (1987), S. 1923-1933 
    Details
    ISSN: 0887-6266
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Surface-enhanced Raman scattering (SERS) has been observed for poly(4-vinyl pyridine) absorbed onto silver island films. Bands near 1219 and 1613 cm-1, which are weak in normal Raman spectra of PVP, are strong in SERS spectra, and the band near 1020 cm-1, which is the strongest band in the normal spectra, is relatively weak in SERS. The strongest bands in the SERS spectra all belong to the same symmetry species as αZZ, implying that the pyridine moieties are adsorbed through the nitrogen atoms with a vertical conformation. The ring breathing mode of the pyridine rings is observed near 1020 cm-1, a frequency characteristic of pyridinium ions or coordinated pyridine, providing further evidence for adsorption through the nitrogen atoms. Silver catalyzed photooxidation, which can lead to the appearance of artifacts in SERS spectra, particularly of polymers, can be reduced by overcoating SERS samples with thin films of polymers such as poly(methyl methacrylate) that have low Raman scattering cross sections.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/polb.1987.090250912
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  • 5
    Electronic Resource
    Electronic Resource
    Surface-enhanced Raman scattering from bilayers of polystyrene, diglycidyl ether of bisphenol-A, poly(4-vinyl pyridine), and poly(4-styrene sulfonate) (1988)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part B: Polymer Physics 26 (1988), S. 2447-2461 
    Details
    ISSN: 0887-6266
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Surface-enhanced Raman scattering (SERS) has been observed from thin films of polystyrene (PS), diglycidyl ether of bisphenol-A (DGEBA), and poly(4-vinyl pyridine) (PVP) deposited on silver island films Degradation of the polymers occurred rapidly during laser irradiation and was accompanied by the appearance of strong bands near 1375 and 1575 cm-1. These bands were attributed to the formation of graphite-like species by the silver-catalyzed thermal oxidation of the polymers induced by localized laser heating of the substrate. When the thin films of PS, DGEBA, or PVP were overcoated with much thicker films of a second polymer such as polystyrene sulfonate (PSS), the degradation was greatly reduced, and excellent SERS spectra of the PS, DGEBA, and PVP films were obtained. Overlayers reduced degradation within the first films deposited on silver island films by restricting the availability of oxygen at the interface to its solubility in the overlayer polymer or by altering the adsorption of oxygen onto the substrate. SERS was observed for the PS, DGEBA, and PVP films and the PSS overlayers when the films were deposited from relatively dilute solutions. When the PS, DGEBA, and PVP films were deposited from more concentrated solutions, SERS was not observed from the PSS overlayers. It was suggested that most of the SERS was due to a short-range, charge-transfer mechanism associated with sites of atomic scale roughness and that SERS was observed from the overlayer when the first film failed to occupy all of the sites.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/polb.1988.090261205
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  • 6
    Electronic Resource
    Electronic Resource
    14. Erzeugung von Nano-Partikeln in Flammenreaktoren und deren Charakterisierung (1999)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 71 (1999), S. 938-939 
    Details
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cite.330710918
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  • 7
    Electronic Resource
    Electronic Resource
    68. Einsatz eines Aerosol-Massenspektrometers (AMS) zur Untersuchung von Partikel-Bildungsprozessen in Hochtemperatur-Reaktoren (1994)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 66 (1994), S. 1202-1202 
    Details
    ISSN: 0009-286X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cite.330660969
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  • 8
    Electronic Resource
    Electronic Resource
    76. Oxidation von Rußpartikeln und Fullerenen bei hohen Temperaturen (1994)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 66 (1994), S. 1207-1208 
    Details
    ISSN: 0009-286X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cite.330660977
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  • 9
    Electronic Resource
    Electronic Resource
    Recherches sur l'hydrolyse par la vapeur d'eau de chlorures alcalins seuls ou additionnés de divers adjuvants (1948)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 31 (1948), S. 1352-1360 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Les auteurs ont déterminé les rendements en acidc chlorhydrique produit par l'hydrolyse, au moyen de la vapeur d'eau, de différents chlorures alcalins en présence ou non d'adjuvants (silice, alumine, kaolin). Ces rendements sont fonction de la pression de HC1 dans l'équilibre d'hydrolyse des sels.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19480310521
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  • 10
    Electronic Resource
    Electronic Resource
    Computersimulation zur Synthese von Siliciumnitrid-Partikeln in Gasphasenreaktoren (1997)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 69 (1997), S. 1304-1304 
    Details
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cite.3306909138
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