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  2. Gel permeation chromatography - Wikipedia

    en.wikipedia.org/wiki/Gel_permeation_chromatography

    Gel permeation chromatography. Gel permeation chromatography (GPC) [1] is a type of size-exclusion chromatography (SEC), that separates high molecular weight or colloidal analytes on the basis of size or diameter, typically in organic solvents. The technique is often used for the analysis of polymers. As a technique, SEC was first developed in ...

  3. Ion-exchange resin - Wikipedia

    en.wikipedia.org/wiki/Ion-exchange_resin

    Ion-exchange resin beads. An ion-exchange resin or ion-exchange polymer is a resin or polymer that acts as a medium for ion exchange, that is also known as an ionex. [1] It is an insoluble matrix (or support structure) normally in the form of small (0.25–1.43 mm radius) microbeads, usually white or yellowish, fabricated from an organic polymer substrate.

  4. Sephadex - Wikipedia

    en.wikipedia.org/wiki/Sephadex

    Sephadex. Sephadex is a cross-linked dextran gel used for gel filtration. It was launched by Pharmacia in 1959, after development work by Jerker Porath and Per Flodin. [1][2] The name is derived from se paration Pha rmacia dex tran. It is normally manufactured in a bead form and most commonly used for gel filtration columns.

  5. Size-exclusion chromatography - Wikipedia

    en.wikipedia.org/wiki/Size-exclusion_chromatography

    Cytiva, Bio-Rad, Bio-Works, emp Biotech, Knauer, Phenomenex. Size-exclusion chromatography, also known as molecular sieve chromatography, [1] is a chromatographic method in which molecules in solution are separated by their shape, and in some cases size. [2] It is usually applied to large molecules or macromolecular complexes such as proteins ...

  6. Water crystal gel - Wikipedia

    en.wikipedia.org/wiki/Water_crystal_gel

    Hydrated water gel, or water beads. Water crystal gel or water beads or gel beads is any gel which absorbs and contains a large amount of water.Water gel is usually in spherical form and composed of a water-absorbing superabsorbent polymer (SAP, also known as slush powder in dry form) such as a polyacrylamide (frequently sodium polyacrylate).

  7. Amazon, Walmart, and Target stop selling potentially deadly ...

    www.aol.com/finance/amazon-walmart-target-stop...

    Walmart said it will prohibit the sale of water beads that are marketed to children under 9, while Target said it will halt the sale of the product marketed to children under the age of 12.