Other methods involve absorption onto beads coated with an absorbent material and filtration.

The system draws in air and traps the particles in a liquid, which then flows past tiny beads coated with antibodies that hook onto only certain pathogens.

The smoke from the burning carbon - mostly carbon dioxide and water vapor - is drawn through an aluminum tube containing beads coated with tobacco essence and other "natural" flavorings.

The receptors are bound to beads coated with a polyhydroxy scintillator.

These oligonucleotides were attached to Dynal magnetic beads coated with streptavidin according to the manufacturer's instructions.

Preliminary identification of the peptide binding to the SSB oligonucleotide was accomplished by synthesising a 5' biotinolyated SSB oligonucleotide and attaching it to magnetic Dynal beads coated with streptavidin.

Because the GST protein has a strong binding affinity for GSH, beads coated with the compound can be added to the protein mixture; as a result, the protein of interest attached to the GST will stick to the beads, isolating the protein from the rest of those in solution.

A chitin binding domain is genetically fused to a protein of interest and then contacted to beads coated with chitin.

A system developed at the Lawrence Livermore National Laboratory draws in air, traps particles in a liquid and flows them past beads coated with antibodies.

As time passes, the beads coated in protein A/G are added to the mixture of antibody and protein.