{
  "name": "Oxygen diffusion across a Paramecium-sized distance",
  "desc": "Time for dissolved oxygen in water at 25 °C to spread 35 µm, half the widest Paramecium caudatum width, and 1 cm, computed as t = x²/(2D), the diffusion time in one dimension",
  "lic": "CC BY 4.0",
  "lic_url": "https://creativecommons.org/licenses/by/4.0/",
  "by": "Ants, Cells & Atoms",
  "url": "https://antscellsandatoms.com/microscopic-life/paramecium/",
  "from": [
    "diffusion coefficient of oxygen in water at 25 °C, 2.1e-5 cm²/s (Somerville and Proctor 2013)",
    "widest Paramecium caudatum width 70 µm (BOSO-Micro)",
    "t = x²/(2D), the diffusion time in one dimension (Vestergaard, Flyvbjerg and Møller 2012)"
  ],
  "how": "Compiled by Ants, Cells & Atoms from the data listed",
  "data_by": [
    "Somerville GA, Proctor RA 2013, BMC Microbiology 13:9, CC BY 2.0, https://doi.org/10.1186/1471-2180-13-9, retrieved 2026-10-24",
    "Velho Rodrigues MF, Lisicki M, Lauga E 2021, PLOS ONE 16(6):e0252291, CC BY 4.0, https://doi.org/10.1371/journal.pone.0252291, retrieved 2026-10-24",
    "One-dimensional diffusion time t = x²/(2D): Vestergaard CL, Flyvbjerg H, Møller IM 2012, Frontiers in Plant Science 3:295, CC BY 3.0, https://doi.org/10.3389/fpls.2012.00295, retrieved 2026-10-24",
    "Diffusion times computed 2026-10-24"
  ]
}