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  • 1
    Electronic Resource
    Electronic Resource
    Theoretical and experimental investigations of subpicosecond photoconductivity (1989)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 66 (1989), S. 236-246 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Monte Carlo methods are used to study photoconductive transients in gallium arsenide. It is demonstrated that working with presently established ranges for the Γ-L coupling coefficient, the existence of a velocity overshoot at moderate fields cannot be exactly predicted. The role of negative velocity electrons in the initial transient for short wavelength excitation is also demonstrated. Details of an actual experiment are described and evaluated against a model which incorporates the Monte Carlo simulation into a transmission line structure with a frequency-dependent characteristic impedance. The results demonstrate that an appropriately designed experiment can observe subpicosecond carrier transport transients.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.343918
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  • 2
    Electronic Resource
    Electronic Resource
    Quantized energy levels in Si inversion layers: A simplified self-consistent approach (1988)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 63 (1988), S. 2704-2710 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A quasi-analytical approximation scheme has been derived to calculate energies, wave functions and populations for the quantum states of electrons in p-Si inversion layers. The analytical character of the wave functions is preserved throughout the computation, and the usual constraint of satisfying Poisson's and Schrödinger's equations self-consistently everywhere in space is bypassed by putting forward physically justified guesses for the functional form of the wave function and the inversion layer potential, and imposing the equality of the first few electrical and quantum-mechanical moments. The values obtained compare favorably with earlier results extracted from purely numerical methods.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.340963
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  • 3
    Electronic Resource
    Electronic Resource
    Surface and domain structures of ferroelectric crystals studied with scanning force microscopy (1993)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 74 (1993), S. 7461-7471 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The understanding of the phenomena of ferroelectricity requires profound knowledge of the ferroelectric domain structure. In this paper we report on the progress of studying ferroelectric domains and domain walls with scanning force microscopy (SFM). Domains and domain walls of ferroelectric crystals of guanidinium aluminum sulfate hexahydrate (GASH) are imaged with SFM. Two sets of complementary results are obtained depending on the operation mode of the instrument. In the non-contact imaging mode (attractive force regime), domain walls are imaged. In the contact imaging mode (repulsive force regime) in addition to the domain wall structure, information about the polarity of the domains is obtained. In these latter images, the opposing contrast of the ferroelectric positive and negative domains is superimposed on the GASH cleavage structure. The imaging mechanism of the contact and noncontact modes are discussed. Corroborating scanning electron microscopy images are presented as well.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.354969
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  • 4
    Electronic Resource
    Electronic Resource
    Quantum balance equations for electronic transport in AlxGa1−xAs/GaAs heterojunctions (1991)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 69 (1991), S. 7689-7696 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We have derived a set of quantum balance equations suitable for the analysis of steady-state electronic transport in AlGaAs/GaAs heterojunctions. Initially, approximate semianalytical expressions for the subband wavefunctions, energy levels, and populations of the two-dimensional electron gas (2DEG) confined at the heterojunction interface are obtained, which are subsequently used in the calculation of the intra- and intervalley correlation functions of the 2DEG. The resulting force and energy balance equations are solved to yield drift velocities and electron temperatures of the electrons as a function of the applied electric field. Remote impurity, longitudinal optical phonon and intervalley phonon scattering are taken into account, as well as the nonparabolicity of the GaAs bandstructure.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.347541
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  • 5
    Electronic Resource
    Electronic Resource
    IMMUNITY AGAINST SOME BEDSONIA IN MAN RESULTING FROM INFECTION AND IN ANIMALS FROM INFECTION OR VACCINATION (1962)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 98 (1962), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1962.tb30553.x
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  • 6
    Electronic Resource
    Electronic Resource
    THE PREVENTION OF PLAGUE IN THE LIGHT OF NEWER KNOWLEDGE (1947)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 48 (1947), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1947.tb31794.x
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  • 7
    Electronic Resource
    Electronic Resource
    PSITTACOSIS GROUP (1953)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 56 (1953), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1953.tb30244.x
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  • 8
    Electronic Resource
    Electronic Resource
    Total knee and hip arthroplasty in haemophilic patients (1998)
    Oxford UK : Blackwell Science Ltd
    Haemophilia 4 (1998), S. 0 
    Details
    ISSN: 1365-2516
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: We evaluated the long-term results of three total hip and nine total knee arthroplasties in nine haemophilic patients with disabling pain and end-stage arthropathy. These patients have been followed over a period of 2–12 years (mean 6.9). One patient had a post-operative haematoma, which was evacuated; two patients required manipulation of the knee because of a limited range of motion. There were no infections. At follow-up, all but two patients were completely free of pain; two patients had occasional pain. The functional improvement was impressive with an average increase in the knee score from 37 to 80 points post-operatively. The hip score increased from 36 to 85 points. The range of motion was increased in seven joints, unchanged in two joints and decreased in three. One total hip arthroplasty was revised after 9 years for aseptic loosening. One total knee demonstrated nonprogressive radiographic evidence of aseptic loosening. Median consumption of coagulation factor concentrate in severe haemophiliacs decreased from 47.00 U yr−1 (range 16.000–144.000) before surgery, to 25.000 U yr−1 (range 18.000–132.000) at 2 years after surgery. Conclusion: hip and knee arthroplasty is a valuable option in symptomatic haemophilic patients with disabling arthropathy, in order to obtain pain relief and functional improvement. It is associated with a low rate of complications and may reduce the need for substitution of factor VIII and IX.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2516.1998.00183.x
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  • 9
    Electronic Resource
    Electronic Resource
    Anti-GD 3 Antibodies are Potent Activators of Human γ/δ and α/β Positive T Cells (1995)
    Oxford, UK : Blackwell Publishing Ltd
    Scandinavian journal of immunology 41 (1995), S. 0 
    Details
    ISSN: 1365-3083
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: The ganglioside GD3 has a variety of biological functions. These include stimulatory effects is on proliferation, natural killer activity and cytokine production by freshly isolated peripheral T cells. In this study we have characterized anti-GD3 antibody (MoAb Z21) mediated effects on T cell clones. Our data indicate that α/β TCR CD4+ and CD8+ as well as γ/δ TCR positive T cells can be stimulated resulting in proliferation and cytokine production. This effect could be blocked by cyclosporin A and did not involve the LFA-3 or CD4 molecule. Apart from IFN-γ and IL-2 production by T helper I and T helper 0 cells we have observed production of IL-4 and IL-10 by T helper 2 cells indicating that the GD3 molecule is not a marker for a certain functional T cell subset. In contrast to anti-CD3 mediated activation, the responsiveness of T cells to stimulation via GD3 was dependent on the cell surface expression of the molecule and could be enhanced by costimulation via CD2, CD3, CD26 or CD28. In addition, anti-GD3 antibodies delivered a potent costimulatory signal for antigen-induced proliferation of CD4+ T lymphocytes. In summary, our experiments illuminate the mechanisms of anti-GD3 antibody induced T cell activation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3083.1995.tb03595.x
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  • 10
    Electronic Resource
    Electronic Resource
    Synthesis and analysis of oxidation and carbonyl condensation compounds of tryptophan
    Amsterdam : Elsevier
    Journal of Chromatography A 661 (1994), S. 93-99 
    Details
    ISSN: 0021-9673
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0021-9673(94)85180-8
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