Confined versus Unconfined Crystallization in Block Copolymer/Salt Mixtures Studied by Depolarized Light Scattering

Hydrogen bond dynamics in water studied by depolarized Rayleigh scattering

2014 We measured the depolarized Rayleigh light scattering by water from 80°C down to 17°C. The spectra obtained could be analysed into two lines, a broad and a sharp one. From the sharp line we deduced a relaxation time which can be interpreted as a reorientational time due to rotations. The broad line gives a relaxation time which is Arrhenius temperature dependent, with an activation energy ...

Detailed analysis of the induction period of polymer crystallization by depolarized light scattering.

In order to clarify the structure formation processes in the induction period of polymer crystallization the annealing time dependence of depolarized light-scattering (DPLS) intensities has been investigated as a function of crystallization temperature for poly(ethylene terephthalate), poly(ethylene naphthalate), syndiotactic polystyrene, and isotactic polystyrene. It is found that the inductio...

Title Detailed analysis of the induction period of polymer crystallization by depolarized light scattering

Distinct signaling mechanisms regulate migration in unconfined versus confined spaces

Using a microchannel assay, we demonstrate that cells adopt distinct signaling strategies to modulate cell migration in different physical microenvironments. We studied α4β1 integrin-mediated signaling, which regulates cell migration pertinent to embryonic development, leukocyte trafficking, and melanoma invasion. We show that α4β1 integrin promotes cell migration through both unconfined and co...

Depolarized resonance light scattering by porphyrin and chlorophyll a aggregates.

A quantum mechanical model is developed for the observed resonance enhancement of light scattering by aggregates of electronically interacting chromophores. Aggregate size, monomer oscillator strength, extent of electronic coupling, and aggregate geometry are all important determinants of intensity in resonance light scattering (RLS) spectra. The theory also predicts the value of the depolariza...