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  • 1
    Electronic Resource
    Electronic Resource
    Synthesis and stereomutation of 5-substituted bicyclo[2.1.0]pentanes (1979)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 101 (1979), S. 3315-3324 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja00506a030
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  • 2
    Electronic Resource
    Electronic Resource
    Flexural Fatigue Damage Evolution for Partially High Percentage Fiber Reinforced Concrete (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 324-325 (Nov. 2006), p. 827-830 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Partially High Percentage Fiber Reinforced Concrete (PHPFRC) is a kind of cementcomposite in which fibers are concentrated with high volume fraction in the tension region of thecomponent under bending. Therefore, PHPFRC possesses much higher load bearing capacity,rigidity, fatigue and fracture properties than conventional steel fiber reinforced concrete (SFRC)while its cost is similar to that of SFRC. In this paper, the fatigue test of PHPFRC is carried out to gainits flexural fatigue damage evolution rule. It is found from the test that, PHPFRC have longpost-crack fatigue life and its fatigue damage is tough damage. Based on the continuum damagemechanics and fatigue behavior of the specimens, a fatigue damage variable D for PHPFRC isdefined and the elementary form of damage evolution function is determined. For the specimens inwhich average fiber volume fraction are 1.2% and local fiber volume fraction are 10%, the functionparameters and the damage threshold value are given according to the test results
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/52/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.324-325.827.pdf
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  • 3
    Electronic Resource
    Electronic Resource
    Effect of Sr/Ba Ratio on Dielectric Properties of BSTN Ceramics (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 336-338 (Apr. 2007), p. 125-128 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: The phase composition of (1-x)BaO·xSrO·0.7TiO2·0.3Nb2O5 (BSTN) composite ceramics wasanalyzed by XRD, and the effect of Sr/Ba ratio on the dielectric properties of BSTN was investigated byimpedance analyzer. The results showed that any sample with different x value contained two phases-theperovskite phase and the tungsten bronze phase. The dielectric constants of BSTN basically decreasedwhile the tanδ increased with the increase in x value. Both dielectric constant and tanδ decreased with theapplied frequency increased for the same x value. There were two Curie points for BSTN compositeceramics. The first one belonging to the perovskite phase decreased with the increase in x value, but thesecond one belonging to the tungsten bronze phase kept almost constant at about 300˚C
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/53/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.336-338.125.pdf
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  • 4
    Electronic Resource
    Electronic Resource
    Mold Filling Process Control of Molten Aluminum in Permanent Molds with a Web Gating System (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 575-578 (Apr. 2008), p. 63-68 
    Details
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Web gate system of aluminum castings in permanent molds is investigated in order toimprove the quality of aluminum castings produced in permanent molds. The metal flow in the moldwere observed and conducted using graphite molds and real time X-ray radiography recorded at a rateof 30 images per second through those molds. The affects of web thickness on flow patterns, gasentrapment, jetting possibility are studied and discussed. Flow and solidification simulation programswere employed to predict the flow behavior under the different conditions that can prevail inpermanent mold gating. The study highlights the characteristic features of web gate system used inpermanent mold aluminum foundries and recommends gating procedures designed to avoid commondefects, and provides direct evidence on the filling pattern and heat flow behavior in permanent moldcastings
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/18/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.575-578.63.pdf
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  • 5
    Electronic Resource
    Electronic Resource
    The effect of large rotation on post-buckling of annular plates (1992)
    Springer
    Acta mechanica solida Sinica 5 (1992), S. 277-284 
    Details
    ISSN: 0894-9166
    Keywords: post-buckling ; large rotation ; bifurcation theory ; shooting method
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract On the basis of the axisymmetrical finite deformation theory on Rissner's plates, the post-buckling behaviour of annular plates and the effect of large rotation are qualitatively and numerically discussed by the method of the bifurcation theory.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02208256
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  • 6
    Electronic Resource
    Electronic Resource
    Inverse scattering for inhomogeneous viscoelastic media (2000)
    College Park, Md. : American Institute of Physics (AIP)
    Journal of Mathematical Physics 41 (2000), S. 2839-2850 
    Details
    ISSN: 1089-7658
    Source: AIP Digital Archive
    Topics: Mathematics , Physics
    Notes: In this paper, the inverse scattering problems for the full inhomogeneous viscoelastic medium are studied via the invariant imbedding technique. Special attention is paid to the propagation operators of the viscoelastic medium and the imbedding equations for these operators are derived. For the inverse scattering problems, it is shown that the reflection data can be extended from one round trip through the iscoelastic slab to arbitrary time with the help of the propagation operators, hence the reconstruction of the relaxation modulus is sufficient to be considered only in one round trip. It is also shown that only one-side measurement reflection data are not sufficient to reconstruct the relaxation modulus and the density of the medium simultaneously. The corresponding numerical examples are presented. For the case that the relaxation modulus of the medium is modeled by two independent functions, an iterative inversion procedure is proposed to recover the relaxation modulus and the density simultaneously with the input two-side normally reflection data. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.533274
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  • 7
    Electronic Resource
    Electronic Resource
    Stereo- and regiospecific cis,cis-muconate cycloisomerization by Rhodococcus rhodochrous N75 (2003)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 224 (2003), S. 0 
    Details
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: cis,cis-Muconate cycloisomerase was purified to homogeneity from cells of Rhodococcus rhodochrous N75 grown at the expense of benzoate and p-toluate as the sole sources of carbon. A single cycloisomerase was found to be induced in this organism with no isoforms being detected when R. rhodochrous N75 was grown on either benzoate or p-toluate as the sole source of carbon. The enzyme is hexameric with a single subunit Mr of 40 000. cis,cis-Muconate cycloisomerase from R. rhodochrous N75 displayed strict regio- and stereospecificity whereby cis,cis-muconate is cycloisomerized to (4S)-muconolactone and 2-methyl- and 3-methyl-substituted muconates are cycloisomerized to 2-methyl- and 4-methyl-substituted muconolactones by 1,4- and 3,6-cycloisomerization, respectively.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/S0378-1097(03)00395-1
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  • 8
    Electronic Resource
    Electronic Resource
    Studies on the synthesis of vitamin B-12. 3 (1983)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 105 (1983), S. 7719-7729 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja00364a043
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  • 9
    Electronic Resource
    Electronic Resource
    Purification and characterization of a glutathione S-transferase from the fungus Cunninghamella elegans (2001)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 203 (2001), S. 0 
    Details
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Cunninghamella elegans grown on Sabouraud dextrose broth had glutathione S-transferase (GST) activity. The enzyme was purified 172-fold from the cytosolic fraction (120 000×g) of the extract from a culture of C. elegans, using Q-Sepharose ion exchange chromatography and glutathione affinity chromatography. The GST showed activity against 1-chloro-2,4-dinitrobenzene, 1,2-dichloro-4-nitrobenzene, 4-nitrobenzyl chloride, and ethacrynic acid. Sodium dodecyl sulfate–polyacrylamide gel electrophoresis gel filtration chromatography revealed that the native enzyme was homodimeric with a subunit of Mr 27 000. Comparison by Western blot analysis implied that this fungal GST had no relationship with mammalian α-, μ-, and π-class GSTs, although it showed a small degree of cross-reactivity with a θ-class GST. The N-terminal amino acid sequence of the purified enzyme showed no significant homology with other known GSTs.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6968.2001.tb10850.x
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  • 10
    Electronic Resource
    Electronic Resource
    Purification and characterization of an erythromycin esterase from an erythromycin-resistant Pseudomonas sp. (2002)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 210 (2002), S. 0 
    Details
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: An erythromycin esterase (molecular mass 51 200 Da) was purified from Pseudomonas sp. GD100, which was isolated from a salmon hatchery sediment sample from Washington State. The pI of the protein was 4.5–4.8. The enzyme was inhibited by 1 mM mercuric acid, and had the substrate specificity for structurally related 14-membered macrolides, which decreased in the order of oleandomycin, erythromycin A and erythromycin A enol ether. The activity for erythromycin A varied with temperature, but the effect of pH was minimal at pH 6.0–9.0. The half-life of the enzyme was estimated to be 8.9 h at 35°C and 0.23 h at 55°C, and the activation energy of the catalytic reaction of erythromycin A was estimated at 16.2 kJ mol−1.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6968.2002.tb11187.x
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