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  • Analytical Chemistry and Spectroscopy  (1)
  • Cerebral vasoconstriction  (1)
  • Chromaffin cells  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Acute cerebral artery constriction in the spontaneously hypertensive rat following blood and plasma administration into the subarachnoid space (1996)
    Springer
    Journal of biomedical science 3 (1996), S. 117-125 
    Details
    ISSN: 1423-0127
    Keywords: Subarachnoid hemorrhage ; Spontaneously hypertensive rat ; Vasospasm ; Cerebral vasoconstriction ; Vascular casting
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract The purpose of the present study was to demonstrate, using a vascular casting technique, acute vasoconstrictive changes in the cerebral vasculature 1 h following whole-blood or plasma infusion into the subarachnoid space of conscious spontaneously hypertensive rats. Vascular casts from animals infused (over 20 min) with 0.45 ml of heparinized autologous arterial blood or plasma exhibited incomplete filling, while casts from saline-infused controls exhibited virtually no filling defects. Significant elevations in intracranial pressure were noted in blood, but not in plasma- or saline-infused rats. Two characteristic forms of constriction occurred, depending upon the vessel lumen diameter. Vessels with lumen diameters 〉100 µm were flattened longitudinally with deep endothelial nuclear imprints, while smaller vessels had focal circular constrictions resembling beads. Arterial cast filling terminated in vessels with lumen diameters from 70 to 20 µm with focal signs of constriction at or near the point of cast termination. The results indicate that the presence of both blood and plasma in the subarachnoid space produces acute small-artery constriction. This phenomenon is due to a noncellular blood component and does not correlate with increases in intracranial pressure.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02255539
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Presence of adrenal medullary chromaffin cells in primary adrenal dispersions and their persistence in long-term culture (1982)
    Springer
    Cell & tissue research 227 (1982), S. 225-229 
    Details
    ISSN: 1432-0878
    Keywords: Chromaffin cells ; Adrenocortical cell suspensions ; Cell culture ; Catecholamine fluorescence
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Cell suspensions prepared by enzymatic dispersion of whole rat adrenal glands for the purpose of studying adrenocortical cells were found to contain chromaffin cells even though they are commonly thought to not survive in such preparations. These cells fluoresced when treated with methods specific for catecholamines. The fluorescent cells persisted in the cultures of “cortical” cells, took on the morphology of neurons in the cultures, maintained their specific catecholamine fluorescence in long-term cultures, and ultrastructurally were identical to chromaffin cells.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00206344
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Elemental X-ray mapping of cementitious phases using an energy-dispersive spectrometer in the scanning electron microscope (1978)
    New York, NY [u.a.] : Wiley-Blackwell
    X-Ray Spectrometry 7 (1978), S. 145-147 
    Details
    ISSN: 0049-8246
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: Elemental X-Ray mappings on Portland cement clinkers have been obtained using a scaning electron microscope-energy dispersive system (SEM-EDS). Using this method, elemental mapping of the major constituents of cement (Ca, Si, Al, Fe) can be generated in as little as 300 s, while the minor constituents(〈10%) Such as Na, Mg, P, S, K yield poorer contrast mappings. The technique used and the resultant mappings obtained are discussed.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/xrs.1300070306
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    Paper (German National Licenses)
    Fulltext
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