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  • 1
    Electronic Resource
    Electronic Resource
    T2-weighted MR imaging for hepatic hemangiomas: comparison of breath-hold and non-breath-hold turbo spin-echo pulse sequences with phased-array multicoil (1998)
    Springer
    Abdominal imaging 23 (1998), S. 422-426 
    Details
    ISSN: 1432-0509
    Keywords: Key words: Angioma, gastrointestinal tract—Liver, MR—Liver neoplasms, MR—Magnetic resonance (MR), comparative studies—Magnetic resonance (MR), technique.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract. Background: We compared T2-weighted and heavily T2-weighted breath-hold turbo spin-echo (TSE) sequences with T2-weighted non-breath-hold TSE sequence to evaluate hepatic hemangiomas on magnetic resonance (MR) with a phased-array multicoil. Methods: Twenty-two patients with 27 hemangiomas were studied at 1.0-T scanner by using T2-weighted and heavily T2-weighted breath-hold TSE sequences (18 s each) and non-breath-hold T2-weighted TSE sequences with use of a phased-array multicoil. Images were quantitatively analyzed for tumor-to-liver signal-difference-to-noise ratios (SD/Ns) and tumor-to-liver signal intensity ratios (T/Ls) and qualitatively analyzed for tumor conspicuity and motion-induced image artifacts. Results: Quantitatively, T2-weighted breath-hold TSE images showed the highest SD/Ns among the three sequences, although the differences from the heavily T2-weighted breath-hold TSE sequence and the T2-weighted non-breath-hold TSE sequence were not statistically significant (p= 0.61 and 0.06, respectively). Heavily T2-weighted breath-hold TSE images showed the highest T/Ls among the three sequences. The differences from the T2-weighted breath-hold TSE sequence and the T2-weighted non-breath-hold TSE sequence were statistically significant (p 〈 0.001). Qualitatively, breath-hold TSE images were superior to non-breath-hold TSE images in terms of tumor conspicuity (p 〈 0.01) and motion artifacts (p 〈 0.01). Conclusion: T2-weighted breath-hold TSE sequence is superior to T2-weighted non-breath-hold TSE sequence in the evaluation of hepatic hemangiomas on MR with a phased-array multicoil.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002619900372
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  • 2
    Electronic Resource
    Electronic Resource
    Dissociative electron attachment to some chlorine-containing molecules (1989)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 90 (1989), S. 3145-3152 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The electron-attachment rate constants of CH3Cl, C2H5Cl, and C2H3Cl in N2 and Ar were measured as a function of reduced electric field (E/N). These data and the previous data of SOCl2 and CCl2F2 were converted to the electron-attachment cross sections as a function of electron energy. The present results are compared with existing fragmentary data. The dissociative electron-attachment processes of the studied molecules are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.455916
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  • 3
    Electronic Resource
    Electronic Resource
    The conflict over global warming - The application of scientific research to policy choices
    Amsterdam : Elsevier
    Global Environmental Change 1 (1991), S. 109-123 
    Details
    ISSN: 0959-3780
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Energy, Environment Protection, Nuclear Power Engineering
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0959-3780(91)90018-O
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  • 4
    Electronic Resource
    Electronic Resource
    Separation of oligosaccharides containing terminal α-linked galactose residues by affinity chromatography on Griffonia simplicifolia I bound to concanavalin A-Sepharose
    Amsterdam : Elsevier
    Analytical Biochemistry 175 (1988), S. 390-396 
    Details
    ISSN: 0003-2697
    Keywords: Griffonia simplicifolia ; chromatography ; lectin ; oligosaccharide
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0003-2697(88)90562-3
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  • 5
    Electronic Resource
    Electronic Resource
    An assay for leukoagglutinating lectins using suspension cultured mouse lymphoma cells (BW5147) stained with neutral red
    Amsterdam : Elsevier
    Analytical Biochemistry 161 (1987), S. 80-84 
    Details
    ISSN: 0003-2697
    Keywords: binding assays ; cell surfaces ; glycoproteins ; lectins
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0003-2697(87)90654-3
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  • 6
    Electronic Resource
    Electronic Resource
    Transient thermal stresses of two near-edge defects due to a moving heat source
    Amsterdam : Elsevier
    Optics and Lasers in Engineering 15 (1991), S. 215-240 
    Details
    ISSN: 0143-8166
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Electrical Engineering, Measurement and Control Technology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics , Technology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0143-8166(91)90061-W
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  • 7
    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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  • 8
    Electronic Resource
    Electronic Resource
    Electron attachment rate constants of SOCl2 in Ar, N2, and CH4 (1986)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 85 (1986), S. 6470-6474 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The electron attachment rate constants of SOCl2 in the buffer gases of Ar, N2, and CH4 (150 to 500 Torr) at various E/N (1–15 Td) were measured by a parallel-plate drift-tube electron-swarm technique. Electrons were produced by irradiating the cathode with KrF laser photons. For the SOCl2–Ar mixture, the electron attachment rate constant has a maximum value of 6.2×10−10 cm3/s at E/N=4 Td. For SOCl2 in N2, the electron attachment rate constant is 1.25×10−9 cm3/s at E/N=1.3 Td, and decreases with increasing E/N. For SOCl2 in CH4, the electron attachment rate constant is 4.8×10−9 cm3/s at E/N=1 Td, and decreases with increasing E/N. For every gas mixture studied, the electron attachment rate constant is independent of buffer gas pressure, indicating that the electron attachment to SOCl2 is due to a dissociative process. The electron attachment processes in the studied gas mixtures are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.451427
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  • 9
    Electronic Resource
    Electronic Resource
    Positive and negative persistent photoconductivities in semimetallic AlxGa1−xSb/InAs quantum wells (1999)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 86 (1999), S. 3152-3158 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We report a detailed investigation of the "positive" persistent photoconductivity (PPC) and "negative" persistent photoconductivity (NPPC) in semimetallic AlxGa1−xSb/InAs quantum wells. The studies of the NPPC and PPC effects have been performed under various conditions, such as different photon energy of excitation, different temperature, different Al composition x, and different well width. It is found that all the previously proposed mechanisms fail to explain several of our observations. We suggest that the NPPC and PPC effects are produced principally by two competing processes. At a high temperature, the photoconduction is dominated by the photogenerated electrons in the InAs well, in which the relaxation of the excess electrons is prohibited by an energy barrier due to the trapping of photoexcited holes by deep defects in the InAs well. As a result, the PPC is observed. At low temperature, electrons in the InAs layer are photoexcited into the local potential minima induced by compositional fluctuations at the AlGaSb and InAs interface, the number of electrons in the InAs well decreases, thus the NPPC occurs. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.371182
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  • 10
    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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