Perhaps you should try some spelling variations:

• centrifugation algorithmss »
  • identification algorithms (Expand Search)
• automated centrifugation »
  • automated distribution (Expand Search)
  • automated manipulation (Expand Search)
  • automated quantification (Expand Search)
• estimation algorithms »
  • optimization algorithms (Expand Search)
  • optimization algorithm (Expand Search)
  • evolution algorithms (Expand Search)
• automatic estimation »
  • automatic extraction (Expand Search)
  • automatic elevation (Expand Search)
  • automatic stations (Expand Search)