Synopsis
A densitometric method was utilized in the measurement of the relative thickness of the cellular membranes in the ventral lobe of the rat prostate. Potassium permanganate, glutaraldehyde, osmium tetroxide, and ruthenium tetroxide solutions were used as fixatives. During preparation for electron microscopy, the tissues were given standardized treatments to reduce methodological errors; latex particles were applied to the thin sections to serve as reference particles of a known size. The most remarkable observation of the study was that the densitometric method yielded reproducible results and that the different fixatives gave significantly different values for the relative thickness of cellular membranes. Glutaraldehyde, or glutaraldehyde followed by ruthenium tetroxide post-fixation, gave the highest values for membrane thickness while osmium tetroxide and potassium permanganate gave the lowest values. Glutaraldehyde treatment, prior to osmium tetroxide or potassium permanganate post-fixations, rendered the membranes thicker than after osmium tetroxide and potassium permanganate treatments alone. Ruthenium tetroxide appeared to be very suitable for fixation of cellular membranes.
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Pelttari, A., Helminen, H.J. The effects of various fixatives on the relative thickness of cellular membranes in the ventral lobe of the rat prostate. Histochem J 11, 599–611 (1979). https://doi.org/10.1007/BF01012542
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DOI: https://doi.org/10.1007/BF01012542