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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Anatomy and embryology 182 (1990), S. 215-224 
    ISSN: 1432-0568
    Keywords: Gastrointestinal motility ; Electrophysiology of smooth muscle ; Interstitial cells of Cajal ; Slow waves ; Rhodamine 123
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The role of interstitial cells of Cajal (ICC) is difficult to determine because these cells are not easily identified by light microscopy, and there are no compounds available to specifically lesion ICC. Ultrastructural studies have shown an abundance of mitochondria in ICC. Therefore, we have used rhodamine 123, a fluorescent dye that is specifically accumulated by mitochondria, to identify ICC in canine proximal colon. This technique provided good discrimination between ICC and smooth muscle cells, but enteric neurons were labeled with rhodamine 123. This compound has cytotoxic properties in some cells. Therefore, we treated intact muscle strips with rhodamine 123 while recording intracellular electrical activity from circular muscle cells. Uptake of rhodamine 123 by ICC was associated with an alteration in electrical rhythmicity. These data suggest that rhodamine 123 may be a useful tool for visualizing and perhaps chemically lesioning ICC.
    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 89 (1988), S. 1030-1041 
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The crystal growth rates of Lennard-Jones fcc (face-centered cubic) (111) and (100) faces into the melt have been studied as a function of undercooling by molecular dynamics. The (100) grows without activation energy barrier at rates determined by the difference in the free energies of the crystal and melt phases, and the arrival rate of atoms across a plane determined from the kinetic theory of gases. The maximum velocity occurs at approximately half the melting point and represents 80 m/s for argon. The (111), on the other hand, grows at rates two to three times lower than this; the exact rate being size dependent. The growth kinetics are now activated and resemble Wilson–Frenkel behavior. However, the step responsible for such activation is not the simple liquid diffusion of Wilson–Frenkel theory, but rather the concerted motion of atoms at the interface selecting either all fcc or all hcp (hexagonal close packed) triangular lattice sites before a layer can grow.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 149 (1942), S. 613-613 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] I HAVE observed a curious optical effect which I have not seen described anywhere. If an open book is illuminated fairly strongly from one side, for example, from over one shoulder, the general colour of the white paper is different for the two eyes when one or the other is closed. The effect ...
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Journal of Behavior Therapy and Experimental Psychiatry 14 (1983), S. 109-115 
    ISSN: 0005-7916
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Psychology
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 54 (1989), S. 451-453 
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Particle-induced displacement damage effects in silicon bipolar transistors, including those due to electrons and to fission neutrons, are correlated on the basis of the nonionizing energy deposited in the lattice by the primary knock-on atoms. Deviations from linearity between damage effects and energy deposition are in a direction opposite to those expected from defect cluster models but can be accounted for in terms of the fraction of vacancy-interstitial pairs initially formed that survive recombination.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 55 (1989), S. 1469-1471 
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The particle-induced depression of the superconducting critical temperature Tc of YBa2Cu3O7−δ is shown to be directly proportional, over seven orders of magnitude, to the nonionizing energy deposited in the lattice by primary knock-on atoms displaced by incident electrons, protons, and heavy ions. It is concluded that ΔTc is proportional only to the average number of defects produced and can therefore be predicted for any particle, energy, and fluence from a calculation of the nonionizing energy loss.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 75 (1994), S. 5910-5912 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Successful imaging is demonstrated of the three individual Cartesian components of the vector magnetic field from a magnetized surface. This is accomplished by exploiting the capability of the magnetic force scanning tunneling microscope to generate two-dimensional mapping of definite combinations of orthogonal magnetic-field components. This method is applied to well-characterized patterns on thin-film longitudinal recording media and some peculiar characteristics of recorded magnetization patterns are found, including the presence of a significant cross-track magnetization component persisting along the track edges. The experimental approach and the unique physical insights acquired by simultaneously investigating individual magnetic-field components are discussed.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 73 (1993), S. 5799-5801 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The problem of magnetization image reconstruction from magnetic force scanning tunneling microscopy images is discussed. The reconstruction problem is reduced to some convolution-type integral equations and analytical solutions to these equations are obtained by using the standard Fourier transform technique. The theoretical discussion is illustrated with some numerical examples.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 79 (1996), S. 6063-6063 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Magnetic force microscopy (MFM) is a powerful technique that has gained wide acceptance in the imaging of magnetization patterns. However, MFM images are "raw'' images, and they are not necessarily identical to the original images of the magnetization patterns. In an attempt to investigate the relationship between the raw images and the magnetization patterns, we present a theoretical analysis of the MFM images through numerical computations. In this way, we show the dependence of the images on both the orientation of the probe's magnetic moment and the interaction between the probe moment and the sample magnetic fields. For a pure sinusoidal magnetization pattern, a vertical orientation of the MFM probe's magnetic moment will yield images that follow the magnetic charge density distribution, while a horizontal orientation of the probe will yield MFM images that follow the magnetization patterns themselves. We investigate the deviation from this correlation between the images and the magnetization distribution when magnetization patterns are not purely sinusoidal. Computations are performed for periodic patterns with linear and arctangent transitions. To model the interaction of the tip with the sample's magnetic fields, we model the tip as a Stoner–Wohlfarth particle. This allows us to investigate how the tip–sample interaction may distort the MFM image. Our modeling suggests that in general there is no direct correlation between the raw MFM image and the actual magnetization distribution. This makes a strong case for the implementation of image reconstruction techniques. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 75 (1994), S. 5756-5758 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The capability to image individual vector components of surface magnetic fields locally has been developed recently, and this component-selective technique has been applied to understand the field distribution of recorded patterns. Apart from the commonly measured in-plane component in the direction of the track Hx, a cross-track component Hy has been observed along the edges. While the Hx field images show side written patterns extending laterally from the edges, the Hy field images reveal localized bright and dark spots on both sides of the track. This suggests that pairs of mutually opposite magnetic dipole layers persist on both edges which are oriented transverse to the track direction. A systematic investigation was made of these side fringing fields to understand their behavior as a function of recording wavelength.
    Type of Medium: Electronic Resource
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