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[Feulgen reaction conducted on unfixed smears]

E A Erenpreĭsa, S E Tsvetkova

    Arkhiv Patologii
    |January 1, 1977
    PubMed
    Summary

    Feulgen

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    Area of Science:

    • Cytochemistry
    • Molecular Biology
    • Histology

    Background:

    • Feulgen's reaction is a standard cytochemical staining method.
    • Chemical fixation is typically required before staining.
    • The reaction detects DNA content.

    Purpose of the Study:

    • To investigate an alternative method for Feulgen's reaction.
    • To eliminate the need for chemical fixation.
    • To assess the quantitative accuracy of the modified reaction.

    Main Methods:

    • Hydrolysis of air-dried smears with 5N HCl at room temperature.
    • Application of Schiff's reagent or alternative basic dyes.
    • Analysis of staining results for quantitative accuracy.

    Main Results:

    • Feulgen's reaction can be performed on air-dried smears without chemical fixation.
    • Both Schiff's reagent and alternative basic dyes yield quantitative results.
    • The modified procedure simplifies DNA staining protocols.

    Conclusions:

    • Chemical fixation is not essential for Feulgen's reaction.
    • This simplified method provides accurate quantitative DNA measurements.
    • The findings offer a more efficient approach to cytochemical DNA analysis.

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