False colour SEM of Sephadex beads.

False colour SEM of Sephadex beads.

T875/0254 Rights Managed

Request low-res file

530 pixels on longest edge, unwatermarked

Request/Download high-res file

Uncompressed file size: 51.0MB

Downloadable file size: 2.6MB

Price image Pricing

Please login to use the price calculator


Credit: DR JEREMY BURGESS/SCIENCE PHOTO LIBRARY

Caption: False colour scanning electron micrograph of Sephadex beads. These beads are used in the separation of molecules according to size (molecular weight). They are made of an inert polymer, in this case dextran, and each bead contains pores of a specific size. A glass column is packed with beads in water and the mixture of proteins, or protein and salt, to be separated is poured in. Small molecules can penetrate the pores in the matrix and their progress through the column is impeded, while larger molecules proceed downwards at the rate of flow of the solvent. This technique is known as column chromotography or gel filtration. Magnification: x200 at 6x4.5cm size.

Release details: Model release not required. Property release not required.

Keywords: apparatus, chemical, chemistry, column chromatography, equipment, gel filtration, industry, protein fractionation, proteomics, sephadex, sephadex beads, technology

Licence fees: A licence fee will be charged for any media (low or high resolution) used in your project.