We consider polymers and proteins at membranes
in various non-equilibrium situations.
i) Polymers in shear flows are repelled from membranes and surfaces, useful for desorption of DNA in gene-chip applications.
ii) Proteins are unfolded in shear flows above a threshold shear rate (relevant for wound-healing in blood flow, "van-Willebrandt factor").
The critical shear rate is reduced at surfaces.
iii) Surface-anchored polymers that are beating back and forth can be used to pump liquids over surfaces, which is a concept realized
by biological ciliae but also attractive for synthetic designs.
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