Summary
A formvar-carbon coated grid is placed on the surface of a suspension of a cell fraction. Part of the cellular material will adhere to the formvar-carbon film. For morphologic investigation the grid is immediately transferred to the surface of a washing solution; for histochemical identification of cell structures the grid is however placed on the surface of a incubation medium. After washing or incubation, the grid is negatively stained, i.e. transferred to the surface of the PTA solution (PTA 10%, pH=6,5 with 1 n NaOH), and finally again washed for a short time. Morphological and histochemical (Gomori method for the localisation of the acid phosphatase activity) findings on membranes and particles of a fraction of rat spleen are reported.
Zusammenfassung
Ein mit Formvar-Kohle befilmtes Netz wird auf die Oberfläche einer suspendierten Zellfraktion gelegt. Ein Teil der Suspension wird somit aufgenommen. Für die Untersuchung von morphologischen Strukturen wird es sofort auf die Oberfläche einer Waschlösung übertragen, zur Identifizierung von histochemischen Zellstrukturen auf eine Inkubationslösung. Danach wird das Netz auf die Oberfläche der „negative-staining“-Lösung (PWS 10%, pH 6,5 mit 1 n NaOH) gebracht und anschließend nochmals gewaschen. Morphologische und histochemische (Säurephosphatase nach Gomori) Befunde an Membranen und Partikeln einer Fraktion der Rattenmilz werden diskutiert.
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Reale, E., Luciano, L. Histochemische Reaktion und „negative staining“ von Zellfraktionen. Histochemie 11, 296–304 (1967). https://doi.org/10.1007/BF00305806
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DOI: https://doi.org/10.1007/BF00305806