Nycthemeral variations of mitotic activity in the adrenal cortex of the rat
Michat, L.; Nouet, J.C.
Comptes Rendus des Seances de la Societe de Biologie et de ses Filiales 169(6): 1421-1423
1975
ISSN/ISBN: 0037-9026 PMID: 132230 Document Number: 92687
Working on histologic sections 7 microns thick in the equatorial part of male rat adrenal cortex, we found two high mitotic activity periods. The first one stays at midnight and shows an average number of 42 mitoses per section; the second one occurs at 5 a.m. with an average number of mitoses of 70,1 per section. If we except these particular points, the mitotic activity is low, the average number of mitoses being 13,2 per section.