At present, it seems clear that the nucleolus is multifunctional and represents one of the key cell organelles that participate directly or indirectly in cell resting, proliferation, differentiation and maturation states, and possibly also in programmed cell death. Thus, the morphology and cytochemistry of nucleoli may represent a very useful tool not only for the evaluation of nucleolar biosyn...

Acrosomal proteinase was found to be present in a highly organized distribution within the acrosomes of rabbit spermatozoa by cytochemistry. This distribution consists of at least six linear loops of evenly spaced proteinase granules, which run diagonally across the flat side of the sperm head in a crisscrossing pattern with the two most anterior loops surrounding the region of the acrosome rea...

Vessels within the lymphocytic infiltrate in 161 examples of 24 different diseases have been studied using light and electron microscopy and histochemistry. Hitherto undescribed venules have been identified within lymphocyte aggregates which exhibit a structure, ultrastructure and cytochemistry previously believed to be restricted to the high endothelial venules of lymphoid tissues. The signifi...