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  • 1
    Electronic Resource
    Electronic Resource
    A quadratic potential time-of-flight mass spectrometer for use with slow positron ionization sources and other large-volume ion sources (1991)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 62 (1991), S. 2131-2137 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A time-of-flight spectrometer has been specially designed for measuring the masses of ions produced by low-energy positrons interacting with organic molecules in a Penning trap. To make the flight times insensitive to the starting positions of the ions in the trap, acceleration was done using a potential that varied as the square of the distance of the ion from the detector. The containment of the positrons in the Penning trap for extended time periods effected very long collision paths between the positrons and the molecules. The entire length of the Penning trap source could be sampled. These features produced high sensitivity, enabling the measurement of ionization processes with small cross sections. The spectrometer is useful for mass spectrometry of ions produced by processes other than positron interaction. Both large and small volume sources can be accommodated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1142327
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  • 2
    Electronic Resource
    Electronic Resource
    Design and characterization of a radio-frequency-powered glow discharge source for double-focusing mass spectrometers (1993)
    s.l. : American Chemical Society
    Analytical chemistry 65 (1993), S. 2478-2484 
    Details
    ISSN: 1520-6882
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ac00066a013
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Hydrolysis of Methylglucosides (1954)
    [s.l.] : Nature Publishing Group
    Nature 174 (1954), S. 560-560 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The results of typical experiments are shown in Table 1. Table 1 excess excess Time abund- abund- Temp. of ance ance Substrate Catalyst pH ( C.) heat- oxygen- oxygen- ing 18 in 18 in (hr.) solu- meth- tion anol a-D-Methyl- glucoside 1 -10 N HC1 Yeast* ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/174560a0
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  • 4
    Electronic Resource
    Electronic Resource
    2,4,6-Trinitrotoluene (TNT) transformation by clostridia isolated from a munition-fed bioreactor: comparison with non-adapted bacteria (1997)
    Springer
    Journal of industrial microbiology and biotechnology 18 (1997), S. 82-88 
    Details
    ISSN: 1476-5535
    Keywords: Keywords: anaerobic TNT degradation; clostridia; enteric bacteria; lactobacilli
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Several bacterial strains were examined for their ability to degrade the nitroaromatic explosive 2,4,6-trinitrotoluene (TNT). The strains examined included various clostridial strains isolated from a 4-year-old munition enrichment, related clostridial strains obtained from a culture collection, two enteric bacteria, and three lactobacilli. All Clostridium species tested were able to reduce TNT rapidly in a complex medium. In cell suspension experiments, these strains were also able to reduce 2,4-diamino-6-nitrotoluene (DANT) to 2,4,6-triaminotoluene (TAT) and to produce a compound that is not yet identified; thus, they could not be distinguished from one another with regard to the pathway of transformation. The enteric strains and the lactobacilli were able to perform the initial reduction of TNT, but none was capable of reducing DANT in cell suspensions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/sj.jim.2900257
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  • 5
    Electronic Resource
    Electronic Resource
    Microbial transformation of 2,4,6-trinitrotoluene (1997)
    Springer
    Journal of industrial microbiology and biotechnology 18 (1997), S. 89-96 
    Details
    ISSN: 1476-5535
    Keywords: Keywords: 2,4,6-trinitrotoluene; TNT; biodegradation; bioremediation; munitions
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The manufacture and decommissioning of explosives has generated, and continues to generate, large quantities of waste material whose primary toxic and mutagenic component is 2,4,6-trinitrotoluene (TNT). The magnitude of this problem has motivated a great deal of research into treatment processes and environmental fate studies, including characterization of microbial transformations of TNT. This work has encompassed studies with mixed cultures and pure cultures of microorganisms derived from either TNT-exposed or unexposed sources, and studies using microorganisms chosen for their known capacities to degrade other pollutants. Several of these studies are discussed with regard to whether they identified a process that may lead to the complete detoxification or mineralization of TNT. Since oxygen can have a significant influence on the types of biochemical reactions that can occur and on the oxidation of intermediates of TNT transformation processes, studies in which oxygen was not excluded are discussed separately from studies conducted under anaerobic conditions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/sj.jim.2900258
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