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  • Oxford University Press  (13)
  • Mineralogical Association of Canada  (4)
  • Wiley-Blackwell  (4)
  • American Physical Society (APS)
  • 1
    Electronic Resource
    Electronic Resource
    Dynamic response of strip footings on elastic halfspace (1979)
    Chichester [u.a.] : Wiley-Blackwell
    International Journal for Numerical Methods in Engineering 14 (1979), S. 1597-1612 
    Details
    ISSN: 0029-5981
    Keywords: Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mathematics , Technology
    Notes: Dynamic response of strip footings resting on a soil medium, idealized as an elastic halfspace, is obtained using the finite element discretization technique with constant strain rectangular elements consisting of 4CST elements. Boundary stresses have been computed using a combination of Rayleigh wave absorbing boundaries (RAB) and standard vicous boundaries (SVB). The influences of contact pressure distributions at the footing - soil interface, mass and frequency ratios on the dynamic response of a strip footing are studied. Effects of embedment, static surcharge, nonhomogeneity and nonlinear constitutive relations are shown. Results are compared with the existing solution and are presented graphically.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/nme.1620141103
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Dielectric properties of an epoxy resin (1964)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 8 (1964), S. 2299-2304 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: The dielectric properties of an unmodified epoxy resin with a wide range of hardener content were investigated over the frequency range 5 cycles/sec. to 50 Mcycles/sec and over the temperature range 12-95°C. In the frequency region below 1 Kcycle/sec., the loss is predominently high both in the pure resin and the pure hardener and, interestingly, is very much reduced when the two are mixed to obtain a plasticized product; the loss is at a minimum when the percentage of epoxy is about 10 and increases appreciable on both sides of the figure. At frequencies above 1 Kcycle/sec., a relaxation type loss is obtained in the hardener and the plasticized samples; pure resin again shows a predominently high loss, the maximum for it at room temperature being above 100 Mcycles/sec.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1964.070080525
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Polypropylene filled with barium titanate: Dielectric and mechanical propertiesHercules Research Center Contribution No. 1700. (1978)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 22 (1978), S. 2383-2386 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1978.070220827
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  • 4
    Electronic Resource
    Electronic Resource
    Copolymerization: 2-Vinylpyridine: 1,3-Butadiene (1979)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Chemistry Edition 17 (1979), S. 923-926 
    Details
    ISSN: 0360-6376
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1979.170170330
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  • 5
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    The Mycobacterium phlei Genome: Expectations and Surprises (2016)
    Oxford University Press
    Details
    Publication Date: 2016-04-10
    Description: Mycobacterium phlei , a nontuberculosis mycobacterial species, was first described in 1898–1899. We present the complete genome sequence for the M. phlei CCUG21000 T type strain and the draft genomes for four additional strains. The genome size for all fiveis 5.3 Mb with 69.4% Guanine-Cytosine content. This is 0.35 Mbp smaller than the previously reported M. phlei RIVM draft genome. The size difference is attributed partly to large bacteriophage sequence fragments in the M. phlei RIVM genome. Comparative analysis revealed the following: 1) A CRISPR system similar to Type 1E ( cas 3) in M. phlei RIVM; 2) genes involved in polyamine metabolism and transport ( potAD , potF ) that are absent in other mycobacteria, and 3) strain-specific variations in the number of -factor genes. Moreover, M. phlei has as many as 82 mce (mammalian cell entry) homologs and many of the horizontally acquired genes in M. phlei are present in other environmental bacteria including mycobacteria that share similar habitat. Phylogenetic analysis based on 693 Mycobacterium core genes present in all complete mycobacterial genomes suggested that its closest neighbor is Mycobacterium smegmatis JS623 and Mycobacterium rhodesiae NBB3, while it is more distant to M. smegmatis mc2 155.
    Electronic ISSN: 1759-6653
    Topics: Biology
    Published by Oxford University Press
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  • 6
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    Characterization of Three Mycobacterium spp. with Potential Use in Bioremediation by Genome Sequencing and Comparative Genomics (2015)
    Oxford University Press
    Details
    Publication Date: 2015-07-09
    Description: We provide the genome sequences of the type strains of the polychlorophenol-degrading Mycobacterium chlorophenolicum (DSM43826), the degrader of chlorinated aliphatics Mycobacterium chubuense (DSM44219) and Mycobacterium obuense (DSM44075) that has been tested for use in cancer immunotherapy. The genome sizes of M. chlorophenolicum , M. chubuense , and M. obuense are 6.93, 5.95, and 5.58 Mb with GC-contents of 68.4%, 69.2%, and 67.9%, respectively. Comparative genomic analysis revealed that 3,254 genes are common and we predicted approximately 250 genes acquired through horizontal gene transfer from different sources including proteobacteria. The data also showed that the biodegrading Mycobacterium spp. NBB4, also referred to as M. chubuense NBB4, is distantly related to the M. chubuense type strain and should be considered as a separate species, we suggest it to be named Mycobacterium ethylenense NBB4. Among different categories we identified genes with potential roles in: biodegradation of aromatic compounds and copper homeostasis. These are the first nonpathogenic Mycobacterium spp. found harboring genes involved in copper homeostasis. These findings would therefore provide insight into the role of this group of Mycobacterium spp. in bioremediation as well as the evolution of copper homeostasis within the Mycobacterium genus.
    Electronic ISSN: 1759-6653
    Topics: Biology
    Published by Oxford University Press
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  • 7
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    THE FORSTERITE-DIOPSIDE-SILICA SYSTEM AT 7 GPA AND ITS SIGNIFICANCE IN THE MELTING BEHAVIOR OF THE MANTLE (2012)
    Mineralogical Association of Canada
    Details
    Publication Date: 2012-12-06
    Description: Investigation of the liquidus phase relations in the forsterite–diopside–enstatite system has been made at 7 GPa and variable temperatures under anhydrous condition using a Walker-type multi-anvil high pressure apparatus. A total of 16 compositions were synthesized to facilitate study of this system. Location of the piercing point on the forsterite–diopside bounding join has been established at Fo 39 Di 61 (all compositions are in wt.%) and 1980 ± 20 °C. Electron microprobe analyses of the phases indicate that forsterite ss can incorporate about 1 to 1.5 wt.% monticellite (CaMgSiO 4 ) in solid solution. In the diopside–enstatite join, a temperature minimum occurs at Di 66 En 34 and 1975 ± 30 °C, whereas the peritectic point, where orthopyroxene ss reacts with liquid to form clinopyroxene ss , occurs at En 65 Di 35 and 2010 ± 20 °C. The maximum amount of MgSiO 3 that can be incorporated in diopside ss has been measured to be about 82 wt.%. Because of the increase in the solid solution proportion of MgSiO 3 in diopside ss compared to that at 2 and 5.1 GPa, the peritectic point in the diopside–enstatite bounding join also shifts further toward the enstatite apex. In the ternary system, the invariant point has been located at Fo 54 Di 35 Q 11 and 2010 ± 30 °C, where orthopyroxene ss + forsterite ss + liquid clinopyroxene ss + forsterite ss + liquid occurs. Our present study confirms that the primary phase field of forsterite shrinks and that of clinopyroxene expands further in comparison to that observed at 2 and 5.1 GPa. Preliminary experimental results from composition Fo 80 Di 12 Qtz 8 with 4 wt.% Al 2 O 3 indicate that garnet (Pyrope 98 Grossularite 2 ) and forsterite (with 0.31 wt.% monticellite) are the liquidus phases, followed by clinopyroxene (Al 2 O 3 contents between 3.4 to 2.7 wt.%). At 1970 °C , the average composition of the liquids obtained through electron microprobe analysis was as follows: SiO 2 49.81, MgO 34.72, CaO 7.29, and Al 2 O 3 6.75 wt.%, which is somewhat similar to a komatiitic melt. When projected onto the forsterite–diopside–enstatite plane this liquid composition plots very close to our cotectic line. Taking model mantle composition of a garnet peridotite, a shift in the compositional path of the residual mantle materials has been determined after extraction of the volume percent of the melt using the Lever rule.
    Print ISSN: 0008-4476
    Topics: Geosciences
    Published by Mineralogical Association of Canada
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  • 8
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    'Modulation of the enzymatic activities of replicative helicase (DnaB) by interaction with Hp0897: a possible mechanism for helicase loading in Helicobacter pylori (2016)
    Oxford University Press
    Details
    Publication Date: 2016-04-21
    Description: DNA replication in Helicobacter pylori is initiated from a unique site ( oriC ) on its chromosome where several proteins assemble to form a functional replisome. The assembly of H. pylori replication machinery is similar to that of the model gram negative bacterium Escherichia coli except for the absence of DnaC needed to recruit the hexameric DnaB helicase at the replisome assembly site. In the absence of an obvious DnaC homologue in H. pylori , the question arises as to whether HpDnaB helicase is loaded at the Hp- replication origin by itself or is assisted by other unidentified protein(s). A high-throughput yeast two-hybrid study has revealed two proteins of unknown functions (Hp0897 and Hp0340) that interact with HpDnaB. Here we demonstrate that Hp0897 interacts with HpDnaB helicase in vitro as well as in vivo . Furthermore, the interaction stimulates the DNA binding activity of HpDnaB and modulates its adenosine triphosphate hydrolysis and helicase activities significantly. Prior complex formation of Hp0897 and HpDnaB enhances the binding/loading of DnaB onto DNA. Hp0897, along with HpDnaB, colocalizes with replication complex at initiation but does not move with the replisome during elongation. Together, these results suggest a possible role of Hp0897 in loading of HpDnaB at oriC .
    Print ISSN: 0305-1048
    Electronic ISSN: 1362-4962
    Topics: Biology
    Published by Oxford University Press
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  • 9
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    Laboratory evolution of artificially expanded DNA gives redesignable aptamers that target the toxic form of anthrax protective antigen (2016)
    Oxford University Press
    Details
    Publication Date: 2016-12-01
    Description: Reported here is a laboratory in vitro evolution (LIVE) experiment based on an artificially expanded genetic information system (AEGIS). This experiment delivers the first example of an AEGIS aptamer that binds to an isolated protein target, the first whose structural contact with its target has been outlined and the first to inhibit biologically important activities of its target, the protective antigen from Bacillus anthracis . We show how rational design based on secondary structure predictions can also direct the use of AEGIS to improve the stability and binding of the aptamer to its target. The final aptamer has a dissociation constant of ~35 nM. These results illustrate the value of AEGIS-LIVE for those seeking to obtain receptors and ligands without the complexities of medicinal chemistry, and also challenge the biophysical community to develop new tools to analyze the spectroscopic signatures of new DNA folds that will emerge in synthetic genetic systems replacing standard DNA and RNA as platforms for LIVE.
    Print ISSN: 0305-1048
    Electronic ISSN: 1362-4962
    Topics: Biology
    Published by Oxford University Press
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  • 10
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    Spin wave excitations in the pyrovanadate α−Cu_{2} V_{2} O_{7} (2016)
    American Physical Society (APS)
    Details
    Publication Date: 2016-10-21
    Description: Author(s): A. Banerjee, J. Sannigrahi, S. Bhowal, I. Dasgupta, S. Majumdar, H. C. Walker, A. Bhattacharyya, and D. T. Adroja The pyrovanadate α − Cu 2 V 2 O 7 belongs to the orthorhombic ( F d d 2 ) class of crystals with noncentrosymmetric crystal structure. Recently, the compound has been identified to be a magnetic multiferroic with a substantial electric polarization below the magnetic transition temperature T C = 35 K. Here we re… [Phys. Rev. B 94, 144426] Published Thu Oct 20, 2016
    Keywords: Magnetism
    Print ISSN: 1098-0121
    Electronic ISSN: 1095-3795
    Topics: Physics
    Published by American Physical Society (APS)
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