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  • 1
    Electronic Resource
    Electronic Resource
    Deoxygenation of sulfoxides promoted by electrophilic silicon reagents: preparation of aryl-substituted sulfonium salts (1988)
    s.l. : American Chemical Society
    The @journal of organic chemistry 53 (1988), S. 5571-5573 
    Details
    ISSN: 1520-6904
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/jo00258a041
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  • 2
    Electronic Resource
    Electronic Resource
    Multiplication formulas of orthogonal polynomials of boson field operators: Derivation based on the generalized phase-space method (1988)
    College Park, Md. : American Institute of Physics (AIP)
    Journal of Mathematical Physics 29 (1988), S. 696-701 
    Details
    ISSN: 1089-7658
    Source: AIP Digital Archive
    Topics: Mathematics , Physics
    Notes: The products of several orthogonal polynomials of boson field operators, the quantum mechanical version of multiple Wiener integrals, are expressed as linear combinations of the polynomials. The expression is obtained by making use of the correspondence rules of boson operators and complex numbers.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.528009
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  • 3
    Electronic Resource
    Electronic Resource
    Improvement of the C/N ratio and corrosivity of TbFeCo amorphous films by controlling their microstructure (1988)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 63 (1988), S. 3850-3852 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The dependence of structural and magneto-optical (MO) properties of TbFeCo films on Ar pressure, deposition rate, and magnetic field have been investigated by using the facing-target sputtering (FTS) system. The films prepared at high deposition rate and/or with the plasma-free substrate did not have any appreciable columnar structure. The Kerr rotation angle of the films was as high as 0.37°. No significant change in the magneto-optical properties of the films was observed after exposing them to air for 250 days. MO disks fabricated by the FTS system had a high C/N ratio of 57 dB at a bit length of 5 μm.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.340636
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  • 4
    Electronic Resource
    Electronic Resource
    Neutron and x-ray scattering studies on semicrystalline polymer blends (1988)
    s.l. : American Chemical Society
    Macromolecules 21 (1988), S. 1703-1709 
    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/ma00184a029
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  • 5
    Electronic Resource
    Electronic Resource
    Giant pigmented tumour of the scalp—a diffuse neurofibroma or a congenital naevus showing neurofibromatous changes? Immunohistochemical and electron microscopic studies (1988)
    Oxford, UK : Blackwell Publishing Ltd
    Histopathology 13 (1988), S. 0 
    Details
    ISSN: 1365-2559
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: A case of giant pigmented tumour of the scalp which developed in a 47–year-old woman is reported. Macroscopically, the tumour showed a peculiar two-layered structure, consisting of an upper non-pigmented and a lower pigmented portion. Histologically, it was composed of elongated neurofibromatous tumour cells with abundant collagen fibres in the non-pigmented portion and round naevus-like cells with abundant melanin pigment in the pigmented portion. S-100 protein and neurone-specific enolase were demonstrated in most of the tumour cells, but neurofilament and myelin basic protein were not detected. Electron microscopy revealed melanosomes in the tumour cells of the pigmented portion. These findings might support a melanocytic origin for the tumour, but the lack of superficial pigmentation and the associated hair loss were against this. The tumour may represent an example of duality of neural crest differentiation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2559.1988.tb02023.x
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  • 6
    Electronic Resource
    Electronic Resource
    Off-shell behaviour of theN-N interaction in a six-quark resonating group model of the deuteron (1988)
    Springer
    Few body systems 5 (1988), S. 45-58 
    Details
    ISSN: 1432-5411
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Two different 6-quark resonating group models of the deuteron are investigated to study the off-shell property of theN-N interaction. In the first model the quarks interact by a central one-gluon-exchange potential plus confinement potential. The meson-exchange contribution to then-p potential is simulated by a central GaussianN-N potential. In the second model the quarks interact by one-gluon-and one-pion-exchange potentials (central and noncentral) plus confinement potential. A small additional “σ”-exchange potential between neutron and proton binds the deuteron at the correct energy. Several off-shell variants of the two resonating group models are compared with each other by analyzing their elastic electron scattering cross sections. It is found that the standard renormalized version of the resonating group model yields potentials and wave functions that may be considered physical within the limitations of the model. Unitary off-shell transformations, which modify potentials and wave functions in any sizeable way, lead to a disagreement between the charge distribution predicted by the model via analysis of electron scattering and the charge distribution following from the microscopic quark distribution. Both of the 6-quark models support a soft repulsive core of the tripletn-p potential with a core height of around 900 MeV.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01351268
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  • 7
    Electronic Resource
    Electronic Resource
    Size distribution of fractured areas in one-dimensional systems (1988)
    Springer
    Journal of statistical physics 51 (1988), S. 569-584 
    Details
    ISSN: 1572-9613
    Keywords: Fracture ; size distribution ; power law ; diffusion process ; Hausdorff dimension ; self-similar
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We study a one-dimensional model for fracture, identifying fractured areas with intervals on which a stress fieldξ exceeds a threshold valueΔ. Whenξ is a diffusion process, the cumulative numberN(l) of fractured areas whose length is greater thanl obeys a power lawCl −p asl↓0 with probability one. The exponentp and the constantC are determined. The exponentp agrees with the Hausdorff dimension of the end points of fractured areas, i.e.,ξ −1(Δ). Even ifξ is self-similar with parameterH〉0, i.e.,ξ(cx)−Δ is equivalent toc H {ξ(x)−Δ} for anyc〉0, the exponentp does not depend solely onH;p=λH, whereλɛ(0, 1/H) is another parameter characterizingξ. Non-diffusion processes are given whereN(l) does not follow a power law.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01028473
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  • 8
    Electronic Resource
    Electronic Resource
    Cockayne syndrome: Magnetic resonance images of the brain in a severe form with early onset (1988)
    Springer
    Journal of inherited metabolic disease 11 (1988), S. 88-102 
    Details
    ISSN: 1573-2665
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary A 2-year-old boy with an early onset and severe form of Cockayne's syndrome (CS) showed differences from the common CS form, which made the clinical diagnosis difficult. However, the cellular characteristics of CS, that the patient's skin fibroblasts exhibited the hypersensitivity to the lethal effect of 254 nm ultraviolet light (UV) and a defective recovery of post-UV DNA synthesis, but normal level of UV-induced unscheduled DNA synthesis, were observed. The magnetic resonance imaging (MRI) by the inversion-recovery method of the brain at age of 26 months showed atrophy or poor development of high signal images of the white matter. The MRI spin-echo image showed a low signal image of the lenticular nucleus. The T1 and T2 values of the cerebrum (grey matter, white matter, lenticular nucleus and thalamus) were greater than those of the age-matched controls, but similar to infant brains with much free water. Such MRI findings may suggest hypomyelination leading to the severe atrophy of the brain in this CS patient. His severe symptoms progressed rapidly until his death at 35 months due to systemic sepsis and renal dysfunction. Autopsy revealed severe microcephaly, severe atrophy of cerebrum, cerebellum and brain stem, and calcification throughout the brain, especially in the basal ganglia. Myelin staining showed numerous patchy losses of myelination in the cortical white matter.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01800059
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  • 9
    Electronic Resource
    Electronic Resource
    Stochastic disk dynamo as a model of reversals of the earth's magnetic field (1988)
    Springer
    Journal of statistical physics 53 (1988), S. 19-39 
    Details
    ISSN: 1572-9613
    Keywords: Stochastic ; disk dynamo ; master equation ; large deviation ; reversal ; earth's magnetic field
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A stochastic model is given of a system composed ofN similar disk dynamos interacting with one another. The time evolution of the system is governed by a master equation of the class introduced by van Kampen as relevant to stochastic macrosystems. In the model, reversals of the earth's magnetic field are regarded as large deviations caused by a small random force ofO(N −1/2) from one of the field polarities to the other. Reversal processes are studied by simulation, which shows that the model explains well the activities of the palaeomagnetic field inclusive of statistical laws of the reversal sequence and the intensity distribution. Comparisons are made between the model and dynamical disk dynamo models.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01011542
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  • 10
    Electronic Resource
    Electronic Resource
    Noninvasive measurement of arterial elasticity in various human limbs (1988)
    Springer
    Medical & biological engineering & computing 26 (1988), S. 641-646 
    Details
    ISSN: 1741-0444
    Keywords: Admittance plethysmography ; Arterial compliance ; Human limb ; Noninvasive measurement ; Volume elastic modulus ; Volume oscillometric method
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: Abstract Arterial elasticity expressed by such indices as volume elastic modulus Ev and compliance Ca were noninvasively measured in various human limb segments; the upper arms, forearms, fingers, thighs, calves and toes. These indices are defined, respectively, as $$E_v = \Delta P/(\Delta V/\bar V_a )$$ and Ca=ΔV/ΔP, where ΔP is pulse pressure, $$\bar V_a $$ mean arterial volume and ΔV its pulsatile variation. ΔP was calculated from systolic Pas and mean Pam arterial pressures determined by volume oscillometric sphygmomanometry using the following equation: $$\Delta P = 3(P_{as} - P_{am} )/2\bar V_a $$ and the ΔV were detected by electrical admittance plethysmography at various transmural pressure Pt levels controlled by a compression cuff. The values obtained in these limb segments were compared with each other at Pt levels 0,30 and 60 mm Hg and the differences between them were discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02447504
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