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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Acta neuropathologica 30 (1974), S. 271-276 
    ISSN: 1432-0533
    Keywords: Intracranial Teratoma ; Electron Microscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary A massive congenital benign teratoma grossly replacing the cerebral hemispheres has been examined by light and electron microscopy. The tumor contained tissues derived from all three germ layers. The cerebellum showed morphological features suggesting a state of maturation equivalent to that of 20 to 25 weeks of gestation. The tumor is discussed in the light of present theories on the pathogenesis of teratomas.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Acta neuropathologica 3 (1964), S. 211-216 
    ISSN: 1432-0533
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Verschiedene Glykolyse-Hemmer (0,1 mol Monojodessigsäure, Fluoressigsäure, Natriumfluorid, Natriumbisulfit und eine Mischung von Phenobarbital und Monojodessigsäure) wurden an Gewebe von Großhirnrinde und Kleinhirn des Meerschweinchens angewendet. Es wurde festgestellt, daß Monojodessigsäure sowie Fluoressigsäure so starke Artefakte in den Zellen erzeugen, daß sie nicht als Hemmstoffe geeignet sind. Natriumfluorid und Natriumsulfit erzeugen ebenfalls Artefakte in Form von “Löchern” (Substanzverlust) im Cytoplasma, wenn auch in geringerem Grad als die beiden vorgenannten Hemmstoffe. Eine Mischung von Phenobarbital und Monojodessigsäure (pH 7) kann verwendet werden, jedoch bietet das keine Vorteile gegenüber der gewöhnlichen Fixierung 2 Std nach dem Tod, d.h. jene Zeitspanne, in welcher die übrigen Gewebsproben im Hemmer inkubiert waren. Mit Gallocyanin-Färbung und Bestimmung der Extinktion des Cytoplasma von großen Nervenzellen zeigen die Messungen bis zu 4 Tagen post mortem einen beachtlichen Verlust von RNA am 2. Tag. Da Zellvolumsveränderungen in Form einer anfänglichen Schrumpfung, die von einer Volumszunahme gefolgt werden, muß für die Auswertung der Veränderungen des RNA-Gehaltes im Zellcytoplasma das Volumen im Verhältnis zur RNA-Konzentration berücksichtigt werden.
    Notes: Summary Various inhibitors of glycolysis (0.1 mol monoiodoacetic acid, fluoracetic acid, sodium fluoride, sodium bisulphite, and a mixture of phenobarbital and monoiodoacetic acid) were used on tissue from the cerebral cortex and cerebellum of guinea pigs. Monoiodoacetic acid and fluoracetic acid were found to produce such pronounced artefacts in the cells that they could not be used as inhibitors. Sodium fluoride and sodium sulphite also produce artefacts, in the form of “holes” (loss of substance) in the cytoplasm, though to a lesser degree than the first two inhibitors mentioned. A mixture of phenobarbital and monoiodoacetic acid (pH 7) can be used, but offers no advantages over ordinary fixation 2 hrs after death, i.e. the lapse of time the other tissue samples had lain in inhibitor. With gallocyanin staining and determination of the extinction in the cytoplasm of the large nerve cells, measurements up to 4 dayspost mortem show a demonstrable loss of RNA on the 2nd day. As there are cell volume changes in the form of an initial shrinkage followed by an increase in the volume, the volume must be allowed for in relation to the RNA concentration in order to evaluate the changes in the RNA content of the cytoplasm of the cells.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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