- G.E. Palade described ribosomes as particles with high affinity to contrast dyes as early as 1955.
- In 1952-1953, electron microscopy made it possible for G.E. Palade and F.S. Sjostrand to show the characteristic structural differences of mitochondria.

Reference:
1. Color Atlas of Cytology, Histology, and Microscopic Anatomy 4th Edition. Wolfgang Kuehnel, M.D. Thieme Publications. 2003.