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  • 1
    Electronic Resource
    Electronic Resource
    Pulse Radiolysis of 2-Mercaptoethanol in Oxygenated Aqueous Solution. Generation and Reactions of the Thiylperoxyl Radical (1994)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 98 (1994), S. 6541-6547 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j100077a020
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  • 2
    Electronic Resource
    Electronic Resource
    Photoelectron spectroscopy of manganese–sulfur cluster anions (1996)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 104 (1996), S. 36-41 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Manganese–sulfur cluster anions (MnnS−m, n=1–10, m=1–10) have been studied using a magnetic-bottle type photoelectron spectroscopy (PES). The MnnS−m cluster anions were formed in a laser vaporization cluster source. The most stable cluster anions were found to have the compositions of n=m and n=m±1. The electron affinities of neutral manganese sulfide clusters were measured from the onsets of the PES spectra. A new electronically excited state at 0.75 eV above the ground state was found for MnS. From the size dependence of the PES spectra, it was found that Mn2S−2, Mn3S−3, and Mn4S−4 are structural frameworks in MnnS−2, MnnS−3, and MnnS−4 series, respectively. The electronic properties and geometrical structures of the clusters are discussed. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.470873
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  • 3
    Electronic Resource
    Electronic Resource
    The formation, photodissociation, and bond structure of cobalt–sulfur cluster ions (1994)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 101 (1994), S. 9528-9533 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The formation and photodissociation of cobalt–sulfur cluster ions (ConS+m) produced by laser ablation on a tablet of well-mixed cobalt and sulfur powder were studied with a home-built tandem time-of-flight (TOF) mass spectrometer. In the mass spectrum, there are many intense peaks of more stable cluster ions ConS+m signified as follows: n=2–5,7, m=n−1; n=6,8–11, m=n−2; n=12–13, m=n−3; n=14–16, m=n−4. The photolysis of the mass-selected cluster ions was performed with a 248 nm excimer laser. The dissociation patterns support the above composition results. Previous theories about clusters do not explain the experimental results. A relationship between the electron number and orbital number of more stable clusters was recognized. Ab initio calculations were performed on two small cluster ions to determine stable geometries. © 1994 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.467984
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  • 4
    Electronic Resource
    Electronic Resource
    Photoelectron spectroscopy of iron–sulfur cluster anions (1996)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 104 (1996), S. 3413-3419 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Iron–sulfur cluster anions (FenS−m, n=1–6, m=1–6) have been studied using photoelectron spectroscopy (PES) with a magnetic-bottle-type time-of-flight electron spectrometer. The FenS−m cluster anions were formed in a laser vaporization cluster source. It was found that the stable cluster ions are the ones with compositions of n=m and n=m±1. The electron affinities were measured from the onsets of the PES spectra. Three low-lying electronic states were observed for FeS. The PES spectra of FenS− (n=1–4) series show a unique similarity, indicating that the Fe atom addition to FeS− has little effect on the electronic property of FeS. The PES spectra of FenS−2 series show a similarity among the cluster anions with n=2–4, showing that Fe2S−2 is the structural framework of these clusters. For FenS−3 series, Fe3S−3 is proposed to be the structural framework. The electronic properties and geometrical structures of the clusters are discussed. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.471048
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  • 5
    Electronic Resource
    Electronic Resource
    The production and photodissociation of iron–sulfur cluster ions (1993)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 99 (1993), S. 1765-1770 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Iron–sulfur cluster ions FenSm+ (n=1–13, m=1–13) were produced by direct laser ablation on a solid sample containing a mixture of iron and sulfur powder. UV photodissociation of the cluster ions was studied with a tandem time-of-flight mass spectrometer. It was found that all the cluster ions with compositions of m=n, m=n−1, or m=n+5 were relatively more abundant, indicating that they were stable. The photodissociation results of the FenSm+ ions showed that, for parent ions with n(very-much-less-than)m, the main channels were sequential losses of neutral S atoms until n∼m, while for parent ions with n∼m, the main product ions had compositions of smaller m=n or m=n−1. From these experimental results, it is proposed that the FenSn+ cluster ions might have structures similar to those of the FenS*n cores in iron–sulfur proteins, while the FenSm+ (m(approximately-greater-than)n) cluster ions could be considered to have structures with the FenSn+ cores surrounded by some peripheral S atoms.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.465293
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  • 6
    Electronic Resource
    Electronic Resource
    The reaction of superoxide radical anion with dithiothreitol: a chain process (1991)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 95 (1991), S. 4718-4722 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j100165a024
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  • 7
    Electronic Resource
    Electronic Resource
    Aluminum–sulfur cluster ions: Formation and photolysis (1994)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 101 (1994), S. 1219-1224 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Aluminum–sulfur cluster ions were obtained by direct laser ablation (248 nm, ≥10 MW/cm2) and analyzed with a tandem time-of-flight mass spectrometer. The regular peaks of cluster ions having composition of AlS+(Al2S3)n (n=1,2,3,...,31) were shown on the first time-of-flight mass spectrum (TOF-MS). The cluster ions of a certain mass number (m/e) could be selected and photolyzed by an ArF laser (193 nm, 1 MW/cm2). The product ions were analyzed by a second TOF-MS. It was found that the cluster ions lost (Al2S3)x (x=1, 3, or 4) and became smaller cluster ions of the same stable formula AlS+(Al2S3)n−x. Cagelike structures were proposed to be possible for these stable cluster ions. Semiempirical and ab initio quantum chemical calculations have also been performed for some of the clusters.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.467814
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  • 8
    Electronic Resource
    Electronic Resource
    Stereoselective formation of tetrahydrofuran rings via intramolecular alkoxycarbonylation of hydroxyalkenes (1989)
    s.l. : American Chemical Society
    The @journal of organic chemistry 54 (1989), S. 4483-4485 
    Details
    ISSN: 1520-6904
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/jo00280a003
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  • 9
    Electronic Resource
    Electronic Resource
    The Effect of Technological Condition on Electrical Properties of ITO Films (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 345-346 (Aug. 2007), p. 1233-1236 
    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 transparent ITO multi-layers films were fabricated on quartz glass substrate by colloiddip-coating technique from indium metal ingots and stannic chloride. It was systematicallystudied that the effect of the electrical properties of the ITO on doped Sn in quantitative change,different dip-coating technological conditions such as thermal treatment process, coating numberplies by four-probe instrument. From the 5 wt. % Sn to 20 wt. % Sn, with the amount of dopedSn increasing, the sheet resistance of ITO was up to minimum and then increased. Sinteringtemperature and holding time were the reasons for the electrical properties of the ITO films,when other parameters are unaltered. It is also concluded that coating number plies was play animportant role on electrical properties of ITO films by sheet resistance. From the results ofresearch, it can be seen that the multi-layer films has optimum characteristics, whose sheetresistance is 117'/□, when the use level of Sn is 10%wt,heated in 800℃ 15min with repeateddip-coating seven times
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/54/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.345-346.1233.pdf
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  • 10
    Electronic Resource
    Electronic Resource
    Micromechanical Analysis of Excavation Damaged Zone in Anisotropic Rock Mass (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 324-325 (Nov. 2006), p. 81-84 
    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: Rock is a heterogeneous and anisotropic compound material, containing many shearsurfaces, cracks, weak surfaces and faults. Damage and failure in a rock mass can occur throughsliding along persistent discontinuities, or fractures. A new micromechanical approach tomodeling the mechanical behavior of excavation damaged or disturbed zone (EDZ) ofanisotropic rock is presented based on knowledge of the inhomogeneity of rock. In thisnumerical model, damage is analyzed as a direct consequence of microcracks growth. A studyof the effect of elastic and failure anisotropy plus inhomogeneity on the undergroundexcavations reveals that the modes of failure can be significantly influenced by the rockstructure on the small and large scales. Fractures that develop progressively aroundunderground excavations can be simulated using a numerical code called RFPA (RealisticFailure Process Analysis). This code incorporates the microscopic inhomogeneity in Young’smodulus and strength characteristic of rock. In the numerical models of a rock mass, values ofYoung’s modulus and rock strength are realized according to a Weibull distribution in whichthe distribution parameters represent the level of inhomogeneity of the medium. Anothernotable feature of this code is that no a priori assumptions need to be made about where andhow fracture and failure will occur – cracking can occur spontaneously and can exhibit a varietyof mechanisms when certain local stress conditions are met. These unique features have madeRFPA capable of simulating the whole fracturing process of initiation, propagation andcoalescence of fractures around excavations under a variety of loading conditions. The resultsof the simulations show that the code can be used not only to produce fracturing patterns similarto those reported in previous studies, but also to predict fracturing patterns under a variety ofloading conditions. The numerical model was able to reproduce the associated complex stresspatterns and the microseismic emission distribution for a variety of rock structural conditions
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/52/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.324-325.81.pdf
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