**Entanglement in solutions
of
semiflexible polymers**

**Concentration Regimes -
Semiflexible Rods (L<L _{p})**

**Solutions of Actin Protein
Filaments**

**Flourescence Microscopy of
Entangled Actin Filaments**

**Concentration Regimes -
Semiflexible Coils ( L>>L _{p })**

**Semiflexible Polymer in a
Tube**

**Brownian Dynamics
Simulations of Entangled Solutions**

**Scaling collapse of áDd ^{2}(t)ñ**

**Concentration dependence of
R _{e}**

**Concentration dependence of
t _{e}**

**MSD Transverse to Tube of
Chain in a Frozen Network**

**Rotational Diffusivity -
Theory**

**Rotational diffusivity in
concentrated solutions**

**Linear Viscoelasticity (a
preliminary attempt)**

**Binary Collision
Approximation**

**Effective Medium
Approximation**

**Elastic Network
Approximation (ENA)**

**Predictions for Tube Radius
and Entanglement Length**

**Tube Radii from Theory,
Simulations, and Experiment**