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  • 1990-1994  (3)
  • 1991  (3)
  • 1
    Electronic Resource
    Electronic Resource
    Muscular architecture in the omasal laminae of cattle and sheep (1991)
    Springer
    Veterinary research communications 15 (1991), S. 249-256 
    Details
    ISSN: 1573-7446
    Keywords: cattle ; laminae ; musculature ; omasum ; sheep ; stomach
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The muscular architecture of the bovine omasal laminae was examined. The omasal laminae had three thin smooth muscle layers which consisted of an intermediate layer and two lateral layers. The muscle bundles of the intermediate layers ran radially in the laminae and those of the two lateral layers ran parallel to the free border of the laminae. At the free border, three types of the muscular architecture were observed. In a histological study, the muscle bundles of the intermediate layer penetrated into the connective tissue around the smooth muscle fasciculi of the inner layer of the tunica muscularis of the omasal wall and attached to the bundles of both the inner layer and of the outer layer of the tunica muscularis. These results indicate that a re-evaluation of the muscular architecture in the omasal laminae is required to facilitate better understanding of the omasal morphology and physiology.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00430028
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    The effect of EC-IC bypass surgery on resting cerebral blood flow and cerebrovascular reserve capacity studied with stable Xe-CT and acetazolamide test (1991)
    Springer
    Neuroradiology 33 (1991), S. 217-222 
    Details
    ISSN: 1432-1920
    Keywords: EC-IC bypass ; Cerebral blood flow ; Xe-CT ; Cerebrovascular reserve capacity ; Acetazolamide
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Cerebral blood flow (CBF) and cerebrovascular reserve capacity (CRC) were measured by stable xenon computerized tomography (Xe-CT) and acetazolamide test in 15 patients with cerebrovascular disease before and after extracranial-intracranial (EC-IC) bypass surgery for minor stroke, reversible ischemic neurological deficit or transient ischemic attack. All had angiographically shown occlusive lesions of the major arterial trunk. In the present series, global analysis showed that the bypass did not increase the resting rCBF, but did increase the rCRC. We divided the patients into four groups according to the preoperative resting rCBF and rCRC. All 3 patients with normal resting rCBF and reduced rCRC showed postoperative improvement of rCRC. Of 6 patients with reduced CBF and reduced CRC, three had postoperative increase in resting CBF and four had increased CRC. One of two patients with reduced CBF and normal CRC showed only an increase in CRC. We propose that reduced CRC or reduced CBF with reduced CRC are criteria for selection of candidates for bypass surgery. We conclude that Xe-CT with the Diamox test is a useful and simple method for evaluating cerebral hemodynamics. Preoperative grouping with a combination of preoperative resting cCBF and preoperative rCRC is useful for predicting the effect of EC-IC bypass surgery.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00588221
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Effect of copper content on glass formation and superconductivity in the Bi-Pb-Sr-Ca-Cu-O system (1991)
    Springer
    Journal of materials science 26 (1991), S. 683-688 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract High-T c superconducting ceramics of formula Bi0.8Pb0.2SrCaCu x O y (x=1.5, 1.8 and 2.0) were prepared by using the melt-quenching method, and the effect of copper content on glass formation and superconductivity was examined. It was found that the composition withx=1.5 had a tendency to form a glass and Bi2(Sr, Ca)2CuOy crystals tended to precipitate easily during the rapid quenching of melts in the compositions withx=1.8 and 2.0. It was found from the temperature dependence of a.c. complex susceptibility that the intergrain coupling of superconducting crystals in the samples obtained was weak, but the weak coupling was improved by increasing the annealing time. The superconducting glass-ceramics Bi0.8Pb0.2SrCaCu1.5Oy exhibited superconductivity with aT c (zero) of 106 K and aJ c of 250 Acm−2.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00588304
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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