Dictionary > Dextran

Dextran

Dextran
high molecular weight polysaccharides synthesised by some micro organisms. Consist of D glucose linked by – 1,6 bonds (and a few – 1,3 and – 1,4 bonds). Dextran 75 (average molecular weight 75 kD) has a colloid osmotic pressure similar to blood Plasma, so dextran 75 solutions are used clinically as plasma expanders. They will also cause charge shielding and at the right concentrations induce flocculation of red cells, a trick that is used in preparing leucocyte rich plasma for white Cell purification in the laboratory. Cross linked dextran is the basis for sephadex. Commercially derived from strains of Leuconostoc mesenteroides.


You will also like...

kinesin motor proteins transporting molecules across microtubules
Movement of Molecules Across Cell Membranes

Molecules move within the cell or from one cell to another through different strategies. Transport may be in the form of..

Geological Periods
Geological Periods

Geological periods is a study guide that cites the different geological periods on Earth's timeline. Each has a brief ov..

Young plant growing from the soil.
Soils

Nutrients in the soil are essential to the proper growth of a land plant. This tutorial deals with the properties of soi..

Homeostasis by water regulation
Homeostasis of Organism Water Regulation

Osmoregulation is the regulation of water concentrations in the bloodstream, effectively controlling the amount of water..

Physical growth
Physical Development in Humans

This tutorial elaborates on the physical development of humans, particularly from puberty to adulthood. Read this tutori..

Adaptation Tutorial
Adaptation Tutorial

Adaptation, in biology and ecology, refers to the process or trait through which organisms or the populations in a habit..