Enantiomers share nearly identical physical properties but have different chiral geometries, making their identification and separation difficult. Here we show that when exposed to a rotating electric field, the left- and right-handed chiral molecules rotate with the field and act as microscopic propellers; moreover, owing to their opposite handedness, they propel along the axis of field rotati...

BACKGROUND Trunk axial rotation is a risk factor for chronic low back pain (CLBP). The characteristics of rotational mobility in the pelvis and spine among CLBP patients are not fully understood. PURPOSE The purpose of this study was to examine three-dimensional kinematic changes, and to compare the differences of rotational mobility and coupled motion, in patients with and without CLBP. ME...

Given two objectsA andB, we denote their configuration space as C-space and each configuration or point in C-space corresponds to relative configuration (i.e., position and orientation) of A w.r.t B. In the rest of the paper, we assume that A is movable and B is fixed. For 2D objects, C-space has 2 degrees of freedom (DOF) if A can only undergo translation motion, and 3-DOF if we take into acco...

Time is of the essence: The rotational motion of biomolecules depends on intra- and intermolecular interactions and thus on distinct functional states. A new method, called HYCUD accurately predicts rotational correlation times in complex dynamic systems. It gives insights into the motional behavior of multidomain proteins in their free form and in supramolecular complexes.

The rotational motion of an interacting Bose-Einstein condensate confined by a harmonic trap is investigated by solving the hydrodynamic equations of superfluids, with the irrotationality constraint for the velocity field. We point out the occurrence of an overcritical branch where the system can rotate with angular velocity larger than the oscillator frequencies. We show that in the case of is...