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  • 2005-2009  (1)
  • 2000-2004  (1)
  • 1970-1974  (2)
  • 1
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Industrial and engineering chemistry 9 (1970), S. 325-329 
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1437-773X
    Keywords: Key wordsα-Smooth muscle actin ; Transforming growth factor-β1 ; Bile ductule ; Bile duct ligation ; Immunohistochemistry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract To investigate the early in vivo response of hepatic stellate cells in biliary fibrosis, we examined rat livers during the first 7 days after bile duct ligation using light microscopy, immunohistochemistry, electron microscopy, and immunoelectron microscopy. At day 1 after bile duct ligation, α-smooth muscle actin-positive fibroblasts appeared and then increased in number around the proliferating bile ductules. With time, the destruction of the external limiting plate became accentuated because of the invasion of the proliferating bile ductules and periductural fibrosis. At day 7, stromal cells containing fat droplets appeared in the fibrous tissue adjacent to the periportal parenchyma; these are termed denuded hepatic stellate cells. In the fibrous tissue disconnected from the liver parenchyma, the denuded hepatic stellate cells were replaced by myofibroblast-like cells. Meanwhile, the expression of transforming growth factor-β1 on biliary epithelial cells increased. These results indicate the dual origin of myofibroblasts in experimental biliary fibrosis, the periductural and periductal fibroblasts in the initial stage, and the denuded hepatic stellate cells in the subsequent stage. These two types of stromal cells may undergo myofibroblastic transformation by the transforming growth factor-β1 secreted by the proliferating biliary epithelial cells.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 295-296 (Oct. 2005), p. 735-740 
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: A rapid calibration method for the parameters of a laser light plane scanning 3D measurement system is proposed. The mathematic model and the calibrated parameters of the measurement system are presented. A novel orthogonal calibration jig composed of two orthogonal planes is designed. The CCD camera parameters and the light plane parameters of the measurement system can be rapidly calibrated with the orthogonal calibration jig. The laser scanning 3D measurement system is calibrated with the calibration jig. A standard plane is measured at different positions. The accuracy is better than 0.1mm
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Acta mechanica 15 (1972), S. 1-19 
    ISSN: 1619-6937
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Description / Table of Contents: Zusammenfassung Für das im Titel genannte Problem werden die Navier-Stokes-Gleichungen nach einer vonSparrow, Lin, undLundgren vorgeschlagenen Methode linearisiert, wodurch die Grundgleichungen Integral-Differentialgleichungen werden. Für den Fall zweier gleichförmiger Strahlen, von denen jeder eine Hälfte des Kreisrohres einnimmt, wird eine exakte Lösung gefunden. Weiters wird eine Variations-Formulierung desselben Problems angegeben, die der Differential-Formulierung vollkommen äquivalent ist. Näherungslösungen dieser Variationsmethode werden erhalten, und es zeigt sich, daß eine einfache zweigliedrige Näherung ausgezeichnete Übereinstimmung mit der exakten Lösung zeigt.
    Notes: Summary This paper is concerned with the problem of confined laminar jet-mixing in a circular channel. The Navier-Stokes equations are linearized patterned after an approach proposed bySparrow, Lin, andLundgren in their study of laminar flow development in a channel. After linearization, the governing equation becomes an integro-differential equation. The exact solution is found for the case of two uniform streams each occupying half of a circular channel. Additionally a variational formulation of the same problem is established, completely equivalent to the differential formulation. This variational formulation is constructed based upon the use of convolutions. Approximate variational solutions are obtained. It develops that a simple two-term approximation gives excellent agreement with the exact solution.
    Type of Medium: Electronic Resource
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