Biomimetic aggrecan solutions show gel-like rheological behavior

Gel-like behavior in aggrecan assemblies.

Aggrecan, a large biological polyelectrolyte molecule with a bottlebrush shape, forms complexes with hyaluronic acid (HA) that provide compressive resistance in cartilage. In solutions of aggrecan alone, the concentration dependence of the osmotic pressure Pi is marked by self-assembly of the molecules into aggregates. When HA is added to the solution at low aggrecan concentration c, the osmoti...

Rheological behavior of microemulsions.

We study the stationary and transient behaviors of a microemulsion phase subjected to a shear flow. The system is described by a diffusion-convective equation that generalizes the usual Cahn-Hilliard equation. Nonlinear terms are treated in a self-consistent approximation. Shear, first and second normal stresses are calculated as momenta of the structure factor. Shear thinning is observed in st...

Rheological Characterization of Ethanolamine Gel Propellants

Gel-like modes. of polymer solutions in ” θ ” solvents

2014 A polymer solution forms a transient network of lifetime Tr. In good solvents, the mesh size l is identical to the correlation length 03BE for the fluctuations of the monomer concentration c. But in « 03B8 » solvents (where the pair interaction vanishes), / is much smaller than 03BE. The dynamics involve then two quantitatively very different elastic moduli E : :1) at low frequencies, E = ...

Effect of some biopolymers on the rheological behavior of surimi gel.

The objective of this study was to investigate the effect of selected biopolymers on the rheological properties of surimi. In our paper, we highlight the functional properties and rheological aspects of some starch mixtures used in surimi. However, the influence of some other ingredients, such as cryoprotectants, mannans, and hydroxylpropylmethylcellulose (HPMC), on the rheological properties o...