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  • 11
    Electronic Resource
    Electronic Resource
    Deuterium Kinetic Isotope Effects and Their Temperature Dependence in the Gas-Phase SN2 Reactions X- + CH3Y .fwdarw. CH3X + Y- (X, Y = Cl, Br, I) (1995)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 117 (1995), S. 10726-10734 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja00148a015
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  • 12
    Electronic Resource
    Electronic Resource
    Copolymerization of 1,6-Anhydro-2,3,4-tri-O-(p-methylbenzyl)-β-D-glucopyranose and 1,6-Anhydro-2,3,4-tri-O-benzyl-β-D-galactopyranose. Possible Application to the Synthesis of Stereoregular Heteropolysaccharides and Oligosaccharides (1973)
    s.l. : American Chemical Society
    Macromolecules 6 (1973), S. 320-324 
    Details
    ISSN: 1520-5835
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ma60033a003
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  • 13
    Electronic Resource
    Electronic Resource
    Kinetic evidence that carbon monoxide dehydrogenase catalyzes the oxidation of carbon monoxide and the synthesis of acetyl-CoA at separate metal clusters (1993)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 115 (1993), S. 11646-11647 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja00077a093
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  • 14
    Electronic Resource
    Electronic Resource
    Chemolithotrophic ATP synthesis and NAD(P) reduction in Thiobacillus tepidarius and T. versutus (1988)
    Springer
    Archives of microbiology 149 (1988), S. 303-307 
    Details
    ISSN: 1432-072X
    Keywords: Thiobacillus tepidarius ; Thiobacillus versutus ; ATP synthesis ; NAD(P) reduction ; Thiosulphate oxidation ; Proton potential (Δp)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Thiosulphate-dependent reduction of NAD and NADP in intact cells of Thiobacillus tepidarius and T. versutus was severely inhibited or abolished by FCCP at concentrations that did not affect ATP synthesis over the same time scale. Thiosulphate-dependent ATP synthesis in T. tepidarius was abolished by the ATPase inhibitor DCCD, which did not affect NAD or NADP reduction at the concentrations tested. These results indicate that energy-dependent NAD(P) reduction using reversal of electron transfer from cytochrome b or c in thiobacilli is directly driven by the Δp generated by thiosulphate oxidation, and does not require the participation of ATP. While NAD(P) reduction and ATP synthesis are thus both effected by sulphur compound oxidation, there is no obligatory link between them.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00411646
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  • 15
    Electronic Resource
    Electronic Resource
    Respiration-driven proton translocation in Thiobacillus versutus and the role of the periplasmic thiosulphate-oxidizing enzyme system (1988)
    Springer
    Archives of microbiology 149 (1988), S. 297-302 
    Details
    ISSN: 1432-072X
    Keywords: Thiobacillus versutus ; Proton translocation ; Thiosulphate oxidation ; Sulphite oxidation ; Periplasmic proteins
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The periplasmic location of enzymes A and B of the thiosulphate-oxidizing multienzyme system of Thiobacillus versutus has been further confirmed by differential radiolabelling of periplasmic and cytoplasmic proteins. The stoichiometries of respiration-driven proton translocation in T. versutus were determined using the oxygen pulse and the initial rate methods. A value for the →H+/O quotient (number of protons translocated per oxygen atom reduced) of about 2.8 was found for the oxidation of thiosulphate, and of about 2.5 for sulphite. The →H+/O quotient for endogenous respiration was about 5.7. The data are shown to be in good agreement with the scheme proposed previously for thiosulphate oxidation by this organism. Proton generation during the oxidation of thiosulphate or sulphite is indicated to occur in the periplasm rather than by pumping across the cytoplasmic membrane. The results also suggest that a →H+/O quotient of six occurs during NADH oxidation (from endogenous metabolism measurements) and that the terminal cytochrome oxidase, aa3, does not function as a proton pump.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00411645
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  • 16
    Electronic Resource
    Electronic Resource
    Cytochromes in Thiobacillus tepidarius and the respiratory chain involved in the oxidation of thiosulphate and tetrathionate (1993)
    Springer
    Archives of microbiology 160 (1993), S. 87-95 
    Details
    ISSN: 1432-072X
    Keywords: Cytochrome b ; Cytochrome c ; CO-binding cytochromes ; Thiosulphate and tetrathionate oxidation ; Thiobacillus tepidarius
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Thiobacillus tepidarius was shown to contain cytochrome(s) c with absorption maxima at 421, 522 and 552 nm in room temperature reduced minus oxidized difference spectra, present at 1.1–1.2 nmol per mg dry wt and present in both membrane and soluble fractions of the cell. The membrane-bound cytochrome c (1.75 nmol per mg membrane protein) had a midpoint potential (Em, pH 7.0) of 337 mV, while the soluble fractions appeared to contain cytochrome(s) c with Em (pH 7.0) values of about 270 and 360 mV. The organism also contained three distinct membrane-bound b-type cytochromes (totalling 0.33 nmol per mg membrane protein), each with absorption maxima in reduced minus oxidized difference spectra at about 428, 532 and 561 nm. The Em (pH 7.0) values for the three cytochromes b were 8 mV (47.8% of total), 182 mV (13.7%) and 322 mV (38.5%). No a- or d-type cytochromes were detectable spectrophotometrically in the intact organism or its membrane and soluble fractions. Evidence is presented for both CO-binding and CO-unreactive cytochromes b or o, and CO-binding cytochrome(s) c. From redox effects observed with CO it is proposed that a cytochrome c donates electrons to a cytochrome b, and that a high potential cytochrome b or o may be acting as the terminal oxidase in substrate oxidation. This may be the ‘445 nm pigment’, a photodissociable CO-binding membrane haemoprotein. Substrate oxidation was relatively insensitive to CO-inhibition, but strongly inhibited by cyanide and azide. Thiosulphate oxidation couples directly to cytochrome c reduction, but tetrathionate oxidation is linked (probably via ubiquinone Q-8) to reduction of a cytochrome b of lower potential than the cytochrome c. The nature of possible electron transport pathways in Thiobacillus tepidarius is discussed. One speculative sequence is: c− → b8 → b182 → c270 → c337 → b322/c360 → O2
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00288708
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  • 17
    Electronic Resource
    Electronic Resource
    Improved Damage Model of 2-D Delamination (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 324-325 (Nov. 2006), p. 439-442 
    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: This paper proposes an improved damage model and derives the shear correction factorsfor the model based on the Whitney[1] method. As the model is mainly used in the delamination front,the overly strong assumptions for geometric deformation in this region may be relaxed so that morerealistic displacement fields can be established
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/52/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.324-325.439.pdf
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  • 18
    Electronic Resource
    Electronic Resource
    Effects of Water Jet Peening on Fatigue Properties of SPA-H and SPCC Steel (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 324-325 (Nov. 2006), p. 1229-1232 
    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: An experimental study of high pressure water jet peening treatment on SPA-H and SPCCsteel was conducted to study the effects of cavitation impacts of high-speed water on fatigue crackinitiation and propagation of notched specimens. Pull-pull fatigue tests’ condition was 350 MPamaximum stress amplitude, 0.1 stress ratio and 10Hz frequency, while in-situ observation by SEMwas employed. It was found that fatigue life of water jet peening treated SPA-H specimens has beenobviously elongated by comparison with specimens without this treatment. However, for SPCCsteel specimens, by comparison with those without water jet peening treatment, fatigue life was alittle elongated, almost the same and obviously shortened corresponding to water jet peeningtreatment time of 5, 10 and 15 minute, respectively. High pressure water jet caused surfacecorrosion for SPCC low carbon steel, while with almost the same carbon content, copper, chromiumand nickel elements increased anti-corrosion properties of SPA-H steel. These resulted in thedifferent fatigue life of SPA-H and SPCC steel. In-situ observation on the crack tips approved aboveanalysis
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/52/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.324-325.1229.pdf
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  • 19
    Electronic Resource
    Electronic Resource
    Combustion Synthesis in Mn-Si-C-N Using Mn as a Surrogate for Am (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Advanced materials research Vol. 26-28 (Oct. 2007), p. 919-924 
    Details
    ISSN: 1662-8985
    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 paper outlined here uses self-propagating high-temperature synthesis (SHS) orcombustion synthesis that employs more efficient and effective high reaction and cooling rates toproduce high quality, reproducible nitride fuels. The fundamental SHS processing parameters wasdetermined to produce Mn-Si-C-N ceramic compounds in which Mn is a surrogate for Am. Becausemanganese nitride has a relatively low heat of formation the reaction can not be self-sustaining whenSi was blended with Mn in the Si:Mn=0.25:1 ratio. The purity of MnSiN2 increases with an increaseof the Mn content in Mn-Si-N system. Pure MnSiN2 can be synthesized when Si was blended with Mnin the Si:Mn = 0.5:1 ratio. Volume expansion and porosity decreases, so density, strength andhardness increase as increasing the Mn content in Mn-Si-N system. The powders and sintered cake ofMnSiN2-Si3N4 or MnSiN2-Si3N4-SiC was produced by combustion synthesis. The sintered cake ofMnSiN2-Si3N4-SiC is attacked by atmospheric moisture to fall to a powder
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/40/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.26-28.919.pdf
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  • 20
    Electronic Resource
    Electronic Resource
    Microstructure and Mechanical Properties of A Ultra-High Carbon Steel (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 324-325 (Nov. 2006), p. 907-910 
    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: A ultrahigh carbon steels (UHCS) containing 1.6 wt pct carbon was studied. Throughspheroidizing process by divorced-eutectoid transformation (DET), the forged microstructure wasspheroidized and the microstructure was fine carbide particles distributed in ferrite matrix.Second-time heat treatment included two kinds of technologies: normalizing and quenching +tempering. Finally, the UHCS obtained ideal mechanical properties. The yield strength and tensilestrength of the UHCS were higher than that of 40CrNiMo, moreover plasticity of the UHCS wasequal to that of 40CrNiMo. So the UHCS was an excellent structural material
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/52/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.324-325.907.pdf
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