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  • 1
    Electronic Resource
    Electronic Resource
    Boron atom reactions. Part II. Rate constants with the epoxides (1986)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 90 (1986), S. 2765-2768 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j100403a041
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  • 2
    Electronic Resource
    Electronic Resource
    Boron atom reactions with silicon and germanium tetrahalides (1988)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 92 (1988), S. 4658-4662 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j100327a020
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  • 3
    Electronic Resource
    Electronic Resource
    Ensemble Monte Carlo simulations of femtosecond thermalization of low-energy photoexcited electrons in GaAs quantum wells (1987)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 62 (1987), S. 4638-4641 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We present results of ensemble Monte Carlo simulations of the room-temperature relaxation of nonthermal photoexcited electrons in GaAs quantum-well structures. Electrons are excited at a mean energy of 20 meV above the band edge, similar to the experiments of Knox et al. [Phys. Rev. Lett. 56, 1191 (1986)] and Oudar et al. [Phys. Rev. Lett. 55, 2075 (1985)]. Since this energy is less than the optical-phonon emission threshold, energy relaxation occurs primarily via carrier-carrier scatterings. We find that the excited electrons thermalize with the background electrons within 200 fs, in agreement with experiment.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.339012
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  • 4
    Electronic Resource
    Electronic Resource
    Boron atom reactions with the halomethanes (1985)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 83 (1985), S. 5595-5601 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Rate constants have been measured for the reactions of boron atoms with a series of halomethanes. The experiments were performed in a linear flow tube apparatus at 300 K. The measured rate constants in units of cm3 molecule−1 s−1 are CCl4:9.5×10−11; CCl3H:4.8×10−11; CCl2H2:6.2×10−11; CClH3:1.4×10−11; CCl3F:3.1×10−11; CCl2F2:5.5×10−12; CClF3:1.7×10−13; CF4:〈3×10−14; CF3H:〈2×10−14. The reaction of boron with all the chloromethanes is facile. The chlorofluoromethanes present a more complex pattern. Noteworthy is the low reactivity of the channel to produce BF, furthermore, the presence of fluorine in the halomethanes reduces the reactivity at the chlorine site. Semiempirical MNDO calculations were performed on the reacting systems. These calculations suggest possible explanations for the observed results.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.449683
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  • 5
    Electronic Resource
    Electronic Resource
    Sterilization of bioreactor media on the basis of computer calculated thermal input designated asF 0 (1988)
    Springer
    Journal of industrial microbiology and biotechnology 3 (1988), S. 305-310 
    Details
    ISSN: 1476-5535
    Keywords: Sterilization ; Bioreactor ; Computer ; F 0 ; Voice synthesizer ; Thermal input
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Summary Industrial fermentation media are normally sterilized with steam to destroy the indigenous microbial population prior to inoculation with a specific microorganism. Because biological validation of each sterilization cycle is impractical, an ‘overkill’ approach is commonly employed on the basis that alteration of heat-sensitive nutrients is less detrimental than survival of indigenous microbes. However, the heat destruction of microbes is known to be a probability function amenable to calculation. A computer has been programmed to calculate the on-line heat input asF 0 values during sterilization of media in stirred bioreactors. The accumulation ofF 0 values is then announced verbally to bioreactor operators by a communications controller with voice synthesizer.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01569531
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  • 6
    Electronic Resource
    Electronic Resource
    Expression of epithelial membrane antigen in perineurial cells and their derivatives (1987)
    Springer
    Acta neuropathologica 75 (1987), S. 160-165 
    Details
    ISSN: 1432-0533
    Keywords: Epithelial membrane antigen ; Pacinian corpuscles ; Perineurial cells ; Perineurioma ; Neurothekeoma
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Paraffin-embedded surgical pathology specimens from skin (5) and muscle (2) biopsies, from Morton's neuromas (3), traumatic neuromas (8), schwannomas (21), neurofibromas (12), and from one perineurioma and one neurothekeoma were studied by immunoperoxidase histochemistry and antibodies against epithelial membrane antigen (EMA), Leu 7 epitopes (Leu 7), S-100 protein (S-100) and cytokeratins. Normal, reactive and neoplastic perineurial cells stain consistently for EMA, whereas Schwann cells express Leu 7 and/or S-100 positivity. None of the immunoreactive cells stained for cytokeratin. Our findings indicate that perineurial and Schwann cells can easily be distinguished by their different patterns of immunoreactivity with the above markers.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00687077
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  • 7
    Electronic Resource
    Electronic Resource
    Random-walk model for equilibrium resistance fluctuations (1984)
    Springer
    Journal of statistical physics 37 (1984), S. 1-16 
    Details
    ISSN: 1572-9613
    Keywords: Random walk ; equilibrium resistance fluctuations ; 1/f noise ; Voss-Clarke relation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The Voss-Clarke relation between the fluctuations of the band-limited Johnson noise power and the nonequilibrium steady-state current fluctuations is investigated for a continuous time random walk (CTRW). The equivalence between the CTRW and a multistate trapping model (MSTM), as shown by Kehr and Haus, is exploited to calculate the higher-order current correlation functions using the Markovian property of the MSTM description. The Voss-Clarke relation is found to be obeyed provided the trapping and release times are long compared to the microscopic correlation time of a carrier in the conduction state. The equilibrium resistance fluctuations are shown to arise physically from equilibrium fluctuations in the number of carriers in the conduction state. It is suggested that the results obtained here should hold for more general trapping models under the same physical conditions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01012901
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