Figure 2:

Comparison of densities among (A) biological organisms in density media, (B) media used for density gradient centrifugation separations, and (C) ENMs (bulk). Densities for gradient density media are represented in percentages of weight by volume (w/v; 10 % iodixanol, 20 % iodixanol, 30 % iodixanol, Percoll (23 % coated silica spheres in water), 20 % sucrose, 30 % sucrose, 50 % sucrose, and 60 %sucrose). T. thermophila: Tetrahymena thermophila; B. braunii: Botryococcus braunii var. Showa; C. elegans: Caenorhabditis elegans; P. aeruginosa: Pseudomonas aeruginosa; D. salina: Dunaliella salina; E. coli: Escherichia coli; C. reinhardtii (cw15): Chlamydomonas reinhardtii (cw15); R. palustris: Rhodobacter palustris (CGA009); S. obliquus: Scenedemus obliquus ^{128, 324–328}