Optical and Magnetooptical Properties of Clinical Dextrans

Abstract

The effect of dextran concentration, pH, temperature, and urea on the conformation of dextran chain in saline solution were studied. Two characteristic concentrations for both dextrans were observed. One with c1 ≈ 0.02 g/dL and second with c 2 ∼ 2 g/dL which may be related with aggregation and overlapping processes of polymer chains, respectively. The mean optical polarizability for dextran polysaccharides were discussed in relation to their radius of gyration. Preliminary results of the Faraday effect dispersion and their temperature dependence is also presented.

Biospeckle laser as a tool to analyze erythrocyte aggregation

“…4 Other studies have been conducted on the effects of macromolecules in such systems. 5,6 The polysaccharide dextran of 500 kDa of molecular weight (dex500) is frequently used as an RBC aggregation promoter for in vitro experimentation. 7 There are two coexisting models to explain the origin of the RBC aggregation.…”

“…The linking of fibrinogen to the RBC has been experimentally demonstrated 4 . Other studies have been conducted on the effects of macromolecules in such systems 5 , 6 . The polysaccharide dextran of 500 kDa of molecular weight (dex500) is frequently used as an RBC aggregation promoter for in vitro experimentation 7 .…”