In biochemistry,<unk>  is a hydrodynamic technique for measuring the rotational diffusion constants (or, equivalently, the rotational drag coefficients.  The<unk>  of a solution sandwiched between two concentric cylinders is measured as a function of the difference in rotational speed between the inner and outer cylinders.  The<unk>  tends to orient an ellipsoidal particle (typically, a protein, virus, etc.) in one direction, whereas rotational diffusion (tumbling) causes the molecule to become disoriented.  The equilibrium between these two processes as a function of the<unk>  provides a measure of the axial ratio of the ellipsoidal particle.
Flow birefringence
Fluorescence
Vitreous humour
Aqueous humour
Macular edema
Sabatier reaction
Intrastromal corneal ring segments
Stripping