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  • 1
    Electronic Resource
    Electronic Resource
    Cellular and Secreted Forms of Acetylcholinesterase in Mouse Muscle Cultures (1985)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of neurochemistry 45 (1985), S. 0 
    Details
    ISSN: 1471-4159
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Abstract: When grown in primary cell culture in the absence of neurons, muscle cells from a variety of species synthesize several forms of acetylcholinesterase (AChE), including the collagen-tailed A12 form. A12 AChE has been the subject of much study because it is thought to be a major functional enzyme form normally found in the basal lamina at the neuromuscular junction. In this paper, we show that muscle fibers derived from mouse embryos and neonates are also able to synthesize substantial percentages of their AChE as the A12 form when grown in vitro. This synthesis is modulated by a process associated with spontaneous muscle contractile activity since both total enzyme levels and the proportion of A12 AChE expressed on the cell surface are decreased when the cells are grown in the sodium channel blocker tetrodotoxin, which blocks muscle contraction. On the other hand, when the cells are treated with veratridine, which opens sodium channels, thereby mimicking one aspect of muscle contraction, their AChE levels are comparable to those of untreated cells. Although smaller in magnitude, these changes are similar to those seen in rat muscle cultures. A novel feature of mouse muscle cultures. not seen in those from rat and chick, is the presence of a secreted enzyme form that sediments in the same position as the cellular A12 form (when separated on sucrose density gradients containing high salt) and is also collagenase sensitive.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1471-4159.1985.tb10553.x
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  • 2
    Electronic Resource
    Electronic Resource
    Polymerization of polyurethane-polyester interpenetrating polymer network (IPN) (1987)
    s.l. : American Chemical Society
    Macromolecules 20 (1987), S. 1490-1495 
    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/ma00173a008
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  • 3
    Electronic Resource
    Electronic Resource
    Adsorption of polyacrylamide on oxide minerals (1989)
    s.l. : American Chemical Society
    Langmuir 5 (1989), S. 854-860 
    Details
    ISSN: 1520-5827
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/la00087a047
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  • 4
    Electronic Resource
    Electronic Resource
    Electron attachment rate constants of HBr, CH3Br, and C2H5Br in N2 and Ar (1988)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 63 (1988), S. 4905-4910 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The electron attachment rate constants of bromine compounds in the buffer gases of N2 and Ar (∼250 Torr) were measured as a function of E/N (or mean electron energy). The measured electron attachment rate constants of HBr, CH3Br, and C2H5Br show maximum values of 1.05×10−9, 1.08×10−11, and 9.3×10−11 cm3/s at mean electron energies of 0.55, 0.4, and 0.8 eV, respectively. The electron drift velocities for the gas mixtures of CH3Br in N2 and Ar were also measured.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.340431
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  • 5
    Electronic Resource
    Electronic Resource
    Attachment of low-energy electrons to HCl (1988)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 64 (1988), S. 1625-1631 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The electron-attachment rate constants of HCl diluted in Ar and N2 were measured as a function of the reduced electric field E/N. These data were converted to the electron-attachment cross section of HCl using the electron-energy distribution functions of pure Ar and N2. The dependence of the electron-attachment rate constant and the mean electron energy on the fraction of HCl in each buffer gas was investigated. A comparison of the current result with both available experimental data and theoretical calculations is made.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.341810
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  • 6
    Electronic Resource
    Electronic Resource
    Two-photon-ionization coefficients of CS2, SO2, and (CH3)3N (1985)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 58 (1985), S. 3295-3301 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Electrons produced by two-photon ionization of CS2, SO2, and (CH3)3N in N2 and CH4 buffer gases at 193 nm were investigated using a parallel-plate drift-tube apparatus. At a low charge density, the transient voltage induced by electron motion between the electrodes is proportional to the gas pressure and the square of laser power. The two-photon-ionization coefficients measured from the number of electrons produced are 3.3×10−27, 8.3×10−30, and 1.7×10−27 cm4/W for CS2, SO2, and (CH3)3N, respectively. The coefficient for (CH3)3N agrees with the earlier value measured by ion current. At a high charge density, the number of electrons observed deviates from the square dependence of laser power. The numbers of ions and electrons are greatly reduced by charge recombination whose reaction rate is enhanced in the presence of space charge.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.335789
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  • 7
    Electronic Resource
    Electronic Resource
    Shortening of electron conduction pulses by electron attacher C3F8 in Ar, N2, and CH4 (1985)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 58 (1985), S. 184-187 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The attachment rate constants of C3F8 in the buffer gases of Ar, N2, and CH4 are measured using a parallel-plate drift-tube apparatus. The dependences of the electron drift velocities on the contents of C3F8 in various buffer gases are investigated. Electrons are produced by irradiating the cathode with ArF laser photons. The transient voltage pulses induced by the electron motion are observed. We find that the C3F8-CH4 mixture has the desirable characteristics of both electron drift velocity and attachment rate constant for the application of diffuse-discharge opening switches.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.335705
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  • 8
    Electronic Resource
    Electronic Resource
    Reaction rate constants of HO2+O3 in the temperature range 233–400 K (1988)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 88 (1988), S. 896-899 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The reaction rate constants of HO2+O3 were measured as a function of temperature. HO2 was produced by the reaction sequence: Cl+CH3OH→CH2OH+HCl and CH2OH+O2→HO2+CH2O. HO2 was detected by the OH(A–X) fluorescence produced by photoexcitation of HO2 at 147 nm. The reaction rate constants are represented by k(T)=(1.8±0.6)×10−14 exp[−(680±148)/T] cm3/s in 253–400 K, and are nearly a constant of (1.3±0.3)×10−15 cm3/s in 233–253 K.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.454169
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  • 9
    Electronic Resource
    Electronic Resource
    Quantitative photoabsorption and fluorescence study of HCl in vacuum ultraviolet (1986)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 85 (1986), S. 719-724 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The photoabsorption and fluorescence cross sections of HCl were measured in the 106–185 nm region. Sharp absortion bands appear at wavelengths shorter than 135 nm, and fluorescence occurs at several excited states. The fluorescence cross sections are generally quite small, indicating that the excited states are strongly predissociative. The molecular processes for producing the VUV and UV fluorescences are investigated, and the Rydberg characteristics of the strong absorption bands are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.451278
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  • 10
    Electronic Resource
    Electronic Resource
    Br* fluorescence from VUV photodissociation of HBr (1985)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 83 (1985), S. 2001-2003 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The vacuum ultraviolet fluorescence of Br atoms resulting from photodissociation of HBr was observed using both synchrotron radiation and argon discharge lamp as light sources. The fluorescence spectrum in the 150–165 nm region was dispersed and identified. Both the absorption and fluorescence cross sections were measured in the excitation wavelength region of 105.6–109 nm. The upper limit of HBr dissociation energy is determined to be 3.65±0.03 eV.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.449342
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