Freely relaxing polymers remember how they were straightened

Freely relaxing polymers remember how they were straightened.

The relaxation of initially straight semiflexible polymers has been discussed mainly with respect to the longest relaxation time. The biologically relevant nonequilibrium dynamics on shorter times is comparatively poorly understood, partly because "initially straight" can be realized in manifold ways. Combining Brownian dynamics simulations and systematic theory, we demonstrate how different ex...

A freely relaxing polymer remembers how it was straightened

Benedikt Obermayer, Wolfram Möbius, 2 Oskar Hallatschek, Erwin Frey, ∗ and Klaus Kroy † Arnold Sommerfeld Center and Center of NanoScience, Ludwig-Maximilians-Universität München, Theresienstr. 37, 80333 München Institut für Theoretische Physik, Universität zu Köln, Zülpicher Str. 77, 50937 Köln Max Planck Institute for Dynamics and Self-Organization, 37073 Göttingen Institut für Theoretische P...

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"Doubly selective" antimicrobial polymers: how do they differentiate between bacteria?

We have investigated how doubly selective synthetic mimics of antimicrobial peptides (SMAMPs), which can differentiate not only between bacteria and mammalian cells, but also between Gram-negative and Gram-positive bacteria, make the latter distinction. By dye-leakage experiments on model vesicles and complementary experiments on bacteria, we were able to relate the Gram selectivity to structur...