Einiges über das Vorkommen derOrchideen in Mittel-Amerika und der sich darauf gründenden Cultur derselben

Ohne Zusammenfassung     

Versuch einer systematischen Aufzählung der in Mexico einheimischen,unter dem Volke gebräuchlichen und cultivirten Nutzpflanzen

Ohne Zusammenfassung     

deBeitr?ge zur Naturgeschichte der V?gel Brasiliens

Ohne ZusammenfassungFazenda do Bom Valle, 15. Februar 1867.     

Beitr?ge zur Naturgeschichte der V?gel Brasiliens

Ohne ZusammenfassungS. Juli-Heft, S. 217–233.     

Biographische Nachricht

Ohne Zusammenfassung     

ELECTRON MICROSCOPY OF HELA CELLS AFTER THE INGESTION OF COLLOIDAL GOLD

Tissue cultures of HeLa cells were grown in media containing colloidal gold, and after various intervals, the cells were fixed, embedded, and sectioned for electron microscopy. Uncoated grids with small holes were used in many of the experiments. Intracellular particles of gold were identified in areas surrounded by single membranes, in moderately dense granules, in globoid bodies, and in the cytoplasmic matrix. Gold particles were not found in typical mitochondria, Golgi complex, ergastoplasm (granular forms of endoplasmic reticulum), or nuclei. The phenomenon of pinocytosis was considered to be the most likely means by which the gold particles were ingested, and the locations of gold particles appeared to have significance concerning theories that membranous organelles of the cytoplasm may be derived from the cell membrane.     

Kurze Mitteilungen

Ohne Zusammenfassung