De Souza W, Benchimol M
Laboratório de Ultraestrutura Celular e Microscopia Eletrônica, Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Brazil.
J Submicrosc Cytol Pathol. 1988 Jul;20(3):619-21.
Electron spectroscopic imaging (ESI) of very thin unstained sections of Tritrichomonas foetus fixed in an osmium tetroxide solution containing calcium and potassium ferrocyanide showed the presence of calcium in the form of electron-dense deposits located in the hydrogenosomes.