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  • Articles  (4)
  • Engineering General  (2)
  • Immunohistochemistry  (2)
  • Chemical Engineering
  • 1975-1979  (4)
  • 1979  (4)
  • 1
    Electronic Resource
    Electronic Resource
    Somatostatinergic nerves in the cervical spinal cord of the monkey (1979)
    Springer
    Cell & tissue research 200 (1979), S. 83-90 
    Details
    ISSN: 1432-0878
    Keywords: Spinal cord ; Tupaia ; Somatostatin ; Immunohistochemistry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Somatostatinergic nerves in the spinal cord of the monkey were investigated utilizing immunohistochemistry with various antibodies against synthetic somatostatin. In contrast to earlier investigations, it is shown that somatostatinergic nerve endings occur in most of the areas of the grey matter of the spinal cord. The somatostatinergic axons are, however, characteristically distributed in three main regions: (1) Densely-packed endings are seen in lamina II of the substantia gelatinosa, forming a crescent-shaped pattern in the columna dorsalis. Somatostatin immunoreactivity is also seen in lamina I and in the Lissauer tract. (2) A fine network of fibers is observed around the central canal; the endings are concentrated on special cell bodies. Some single perikarya are also stained in this region. (3) A loose network of single fibers is found ending on perikarya of the columna lateralis or ventralis. The perikarya of the nerve axons, with the exception of those terminating in the columna dorsalis, have as yet not been identified. In order to better understand the somatostatinergic system of the spinal cord, these newly-detected somatostatinergic nerves must be studied and their exact pathways analyzed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00236889
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Met-enkephalin-like immunoreactivity in Merkel cells (1979)
    Springer
    Cell & tissue research 201 (1979), S. 343-348 
    Details
    ISSN: 1432-0878
    Keywords: Merkel cell ; Sinus hair follicle ; Rat skin ; Enkephalin ; Immunohistochemistry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The Merkel cells from sinus hair follicles of rats were investigated by immunohistochemistry using different antisera against neuropeptides and gastroenteropancreatic (GEP)-hormones. For the first time it has been demonstrated that Merkel cells exhibit an immunoreactivity towards metenkephalin (methionine-enkephalin). The met-enkephalin immunoreactivity was restricted to Merkel cells and was not found in associated nerve axons or terminals. Denervation of Merkel cells did not affect the met-enkephalin immunoreactivity. Antisera against leu-enkephalin (leucine-enkephalin) and other polypeptides did not produce an immunoreaction. The demonstration of met-enkephalin-like immunoreactivity supports the concept that the Merkel cell is a member of the paraneuronal system and a potential neuroreceptor cell.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00236994
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  • 3
    Electronic Resource
    Electronic Resource
    A finite element approach to subsonic aerodynamics (1979)
    Chichester [u.a.] : Wiley-Blackwell
    International Journal for Numerical Methods in Engineering 14 (1979), S. 665-679 
    Details
    ISSN: 0029-5981
    Keywords: Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mathematics , Technology
    Notes: A study of the application of the Finite Element Method to compressible potential flows, typified by the airfoil problem, is undertaken. Some novel approaches, believed to simplify solution techniques, are presented.The solutions use two pseudo-variational integrals, appropriate to subsonic flows, and possessing a physical iterative basis. With constant-derivatives triangular elements formulated for cylindrical co-ordinates, accurate solutions are easily obtained for the flow over a circular cylinder. For arbitrary airfoils a simple mapping is used to transform them into near circles. An appropriate mesh is then constructed in the mapped plane. The paper then presents two solution approaches by which this non-linear problem is solved in both the near circle plane and the airfoil plane.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/nme.1620140504
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  • 4
    Electronic Resource
    Electronic Resource
    3D mine pillar design information from 2D FEM analysis (1979)
    New York, NY [u.a.] : Wiley-Blackwell
    International Journal for Numerical and Analytical Methods in Geomechanics 3 (1979), S. 145-157 
    Details
    ISSN: 0363-9061
    Keywords: Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Architecture, Civil Engineering, Surveying , Geosciences
    Notes: This paper described a technique for obtaining three-dimensional mine design information using a two-dimensional finite element program where the mining geometry consists of an extensive array of underground rooms and pillars. The technique is based upon a simple augmentation of forces in a two-dimensional analysis to produce the same average pillar stress that would occur in a full three dimensional analysis. Detailed comparisons between a three-dimensional analysis, a two-dimensional analysis (plane stress and plane strain) and an augmented two-dimensional analysis (also plane stress and plane strain) of stress about a typical coal mine pillar are presented. A local factor of safety is defined and then mapped over the pillar midplane, the immediate roof and immediate floor using the results from the full three-dimensional analysis. Comparisons of roof and pillar safety factor distributions obtained by the three-dimensional, two-dimensional and augmented two-dimensional analyses show that the minimum safety factors in the pillar (at the pillar sides) are predicted quite closely by the augmented two-dimensional techniqe (plane stress). The same is true of the immediate roof, although the three-dimensional safety factor tends to be higher in the roof (over the room) than that calculated by the augmented twodimensional technique. The augmented loading procedure appears to hold considerable promise as a very efficient and cost reducing techniqe for mine pillar design.
    Additional Material: 12 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/nag.1610030204
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