Movement of microorganisms in viscous environments

  title={Movement of microorganisms in viscous environments},
  author={Howard C. Berg and L. Turner},
SOME microorganisms swim well in solutions containing viscous agents (molecules with long unbranched chains, such as methylcellulose)1–7. Leptospira, a slender helical bacterium, swims more rapidly in such an environment than it does in water3, even at viscosities of several hundred centipoise (1 cP = 10−3 kg m−1 s−1). This behaviour is baffling until one realises that solutions of viscous agents are highly structured (gel-like). The solute forms a loose quasi-rigid network easily penetrated by… CONTINUE READING
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