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  • 1995-1999  (43)
  • 1965-1969  (51)
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  • 1
    Electronic Resource
    Electronic Resource
    Appollonius Revisited: Supporting Spheres for Sundered Systems (1997)
    Springer
    Discrete & computational geometry 18 (1997), S. 385-395 
    Details
    ISSN: 1432-0444
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science , Mathematics
    Notes: Abstract. When C is a ball in ${\Bbb R}^d$ and S is the sphere $\partial C$ , we say that S supports a convex body B if S intersects B and either $B\subseteq C$ (then S is a far support) or the interior of C is disjoint from B (then S is a near support). The focus here is on common supports for a system $\cal B$ of d+1 bodies in ${\Bbb R}^d$ such that for each way of selecting a point from each member of ${\cal B}$ , the selected points are affinely independent and hence form the vertex-set of a d-simplex. The main result asserts that if $({\cal B}',{\cal B}'')$ is an arbitrary partition of ${\cal B}$ , then there exists a unique Euclidean sphere that is simultaneously a near support for each member of ${\cal B}'$ and a far support for each member of ${\cal B}''$ .
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/PL00009324
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  • 2
    Electronic Resource
    Electronic Resource
    Effect of 2,4-dichlorophenoxyacetic acid on different metabolic types of bacteria (1966)
    Springer
    Bulletin of environmental contamination and toxicology 1 (1966), S. 108-120 
    Details
    ISSN: 1432-0800
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01886774
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  • 3
    Electronic Resource
    Electronic Resource
    Preparation and Schistosomicidal Activity of Some 4-Hydroxymethyl-3-chloroanilines (1967)
    s.l. : American Chemical Society
    Journal of medicinal chemistry 10 (1967), S. 877-880 
    Details
    ISSN: 1520-4804
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/jm00317a026
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  • 4
    Electronic Resource
    Electronic Resource
    Feasibility of Facile Proton Migration in Pyrimidines and Related Substances (1969)
    [s.l.] : Nature Publishing Group
    Nature 222 (1969), S. 375-376 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] We demonstrate here that for a carefully selected pyrimidine base, isocytosine (2-amino 4-oxopyrimidine), it is possible, by using an appropriate electrode, to draw currents enormously greater (by factors of about 1010) than those usually associated with so-called organic semiconductors10'11. The ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/222375a0
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  • 5
    Electronic Resource
    Electronic Resource
    Correlated Atomic Collisions in Irradiated Crystal Lattices (1965)
    [s.l.] : Nature Publishing Group
    Nature 208 (1965), S. 880-882 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] WHEN crystalline matter is bombarded with energetic-radiation?protons, neutrons, a-particles, electrons, fission particles, etc.?the atoms of the lattice are disturbed and some are displaced, either singly or collectively, to form defects. The detailed examination of these processes is the physics ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/208880a0
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  • 6
    Electronic Resource
    Electronic Resource
    Evaluation of the Queue Length Distribution for some Queues with Correlated Inputs (1966)
    [s.l.] : Nature Publishing Group
    Nature 211 (1966), S. 1106-1107 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Let x be the number of overdue arrivals and y the number queueing (including the one, if any, being served) at time 1-, that is to say just before a scheduled point. Then (x) and (x, y) are each Markovian. If m and n are the corresponding values at 0~, the number of arrivals in [0, 1) is m + I - x ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/2111106a0
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  • 7
    Electronic Resource
    Electronic Resource
    A B-cell-homing chemokine made in lymphoid follicles activates Burkitt's lymphoma receptor-1 (1998)
    [s.l.] : Macmillan Magazines Ltd.
    Nature 391 (1998), S. 799-803 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Secondary lymphoid organs (spleen, lymph nodes and Peyer's patches) are divided into compartments, such as B-cell zones (follicles) and T-cell zones, which provide specialized environments for specific steps of the immune response. Migration of lymphocyte subsets into these compartments is ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/35876
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  • 8
    Electronic Resource
    Electronic Resource
    The coexistence of pressure waves in the operation of quartz-crystal shear-wave sensors (1998)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 83 (1998), S. 2524-2532 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: It is demonstrated that an AT-cut quartz crystal driven in the thickness-shear-wave mode and typically used as a sensor to monitor the viscoelastic shear-wave properties of a fluid also produce longitudinal pressure waves. Unlike the shear wave, these waves are capable of long-range propagation through the fluid and of reflection at its boundaries, notably at an outer fluid–air interface. They introduce a component into the measured electrical impedance and resonance frequency shift of the crystal, which reflects the setting up of cyclic pressure-wave resonances in the fluid. This has important implications for the practical employment of these crystal as sensors. Under appropriate conditions, as demonstrated for water and n-octane, it is possible to determine the propagating properties of sound waves in a fluid simultaneously with the viscoelastic shear-wave properties. These experiments are supported by an analysis of the appropriate hydrodynamic equations for waves in the crystal–fluid system, which predicts electrical characteristics in close agreement with those found experimentally. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.366990
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  • 9
    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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  • 10
    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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