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  • 1985-1989  (5)
  • 1
    Electronic Resource
    Electronic Resource
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 91 (1989), S. 2758-2759 
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: We studied the dimerization equilibrium of 2-methyl-2-nitrosopropane in argon at 25.0 °C from about 500 to 1200 kg m−3. It is clarified that in the simplest solvent, argon, there exists a definite difference in the density dependence of the equilibrium constant between the high and medium density regions. In the high density region, the equilibrium constant shows a sizable increase with the solvent density as in the liquid phase. Near the critical density, however, the equilibrium constant shows little density dependence.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 90 (1989), S. 5679-5686 
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The dimerization equilibrium of 2-methyl-2-nitrosopropane in carbon dioxide was studied in a wide range of solvent density from 200 to 1100 kg m−3 at 25.0 and 35.0 °C. We found an inversion of the density dependence of the equilibrium constant. The configurational volume change for the dimerization has a large positive value in the medium density region, although it is negative in the high density region as usually observed for the bond formation reactions in the liquid state. This anomaly is reproduced by the cavity distribution function calculated from the integral equation based on the HNC or PY approximation for the Lennard-Jones fluid model. The large positive value in the medium density region is interpreted in terms of desolvation effect due to the dimerization. The long-range correlation between molecules due to attractive forces is suggested to play an important role in determining the reaction volume in the medium density region.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 19 (1986), S. 246-248 
    ISSN: 1600-5767
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences , Physics
    Notes: Interference lines similar to Kossel lines have been observed on Laue photographs of a single-crystal of the title compound. Since the appearance of the lines is temperature dependent, they are interpreted as traces of secondary reflection of thermally scattered radiation from the atomic planes.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Journal of radioanalytical and nuclear chemistry 135 (1989), S. 207-213 
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Pionic X-ray intensity ratios in chromium compounds were compared with those from muonic X-rays. The ratios were found depending on the μ− capture ratio as on μ− capture. The difference of the ratios between Cr/H2O/6Cl3 and CrCl3 was attributed to the formation of pseudoneutron μ− by interaction of hydrogenic protons during passage of a pion in the hydrated compound.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Documenta ophthalmologica 68 (1988), S. 337-348 
    ISSN: 1573-2622
    Keywords: β-blocker ; ERG c-wave ; retinal pigment epithelium ; osmotic pressure ; rabbit
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The toxicity of β-blocker, Befunolol HCl (BFE), to the retinal pigment epithelium was investigated electrophysiologically. Rabbit in vivo ERG b- and c-waves were recorded after intravitreal injections of 0.1 ml of 0.25, 1, 2, 4, 6 and 10% BFE solutions with osmolalities of 304, 340, 383, 432, 493 and 618 mOsm repsectively. Phosphate solutions with osmotic pressure corresponding to the BFE solutions were injected as control. In eyes injected with 0.25% BFE, amplitude of either b- and c-waves were unchanged for 60 min, while in eyes injected with BFE with a higher concentration than 1%, the b-waves attenuated but the c-waves enhanced in proportion to the BFE concentrations. In the control group, the b-waves attenuated and the c-waves enhanced by the injection of the high osmotic phosphate solutions up to 500 mOsm, which corresponded to the osmotic pressure of 6% BFE, but attenuated by the phosphate solutions higher than 600 mOsm. Based on the above result, no acute toxicity of BFE to the retina was suggested in dose of its therapeutic use. The attenuation of b-waves by BFE was likely due to the influence of osmotic pressure since no significant difference in the b-waves amplitudes was found between BFE and equimolar phosphate solutions. However, high concentration of BFE itself was suggested to exhibit an effect to enhance the c-wave because a manifest difference was observed in the c-wave amplitudes between the group at higher BFE concentrations and the correspond control group.
    Type of Medium: Electronic Resource
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