In migrating adherent cells such as fibroblasts and endothelial cells, the microtubule-organizing center (MTOC) reorients toward the leading edge [1-3]. MTOC reorientation repositions the Golgi toward the front of the cell [1] and contributes to directional migration [4]. The mechanism of MTOC reorientation and its relation to the formation of stabilized microtubules (MTs) in the leading edge, ...

Understanding cellular membrane processes is critical for the study of events such as viral entry, neurotransmitter exocytosis, and immune activation. Supported lipid bilayers are commonly used to model these membrane processes experimentally. Despite the relative simplicity of such a system, many important structural and dynamic parameters are not experimentally observable with current techniq...

In this paper we present a study of photoinduced eeects, including molecular relaxation in a side chain liquid crystalline polymer. In particular, we have studied relaxation phenomena using Ellipsometry and Photoinduced Birefringence in pump-probe experiments, which were carried out as a function of temperature, optical pump intensity and sample preparation and history. Two speciic areas were i...

The reorientation dynamics of water confined within nanoscale, hydrophilic silica pores are investigated using molecular dynamics simulations. The effect of surface hydrogen-bonding and electrostatic interactions are examined by comparing with both a silica pore with no charges (representing hydrophobic confinement) and bulk water. The OH reorientation in water is found to slow significantly in...

The estimation of the surface tension of water is theoretically dealt on the basis of the dipole molecular model. It is known that the experimentally determined surface tension of freshly exposed surface has a higher value than the nominal value of 73 [mN/m]. We calculated the value corresponding to the fresh surface where the reorientation of the molecules has not occurred.

Spatial learning and navigation have frequently been investigated using a reorientation task paradigm (Cheng, Cognition, 23(2), 149-78, 1986). However, implementing this task typically involves making tacit assumptions about the nature of spatial information. This has important theoretical consequences: Theories of reorientation typically focus on angles at corners as geometric cues and ignore ...