Before revision: Superparamagnetic microbeads: the monosized Dynabeads (scanning electron microscope image) Microbeads are uniform polymer particles, typically 0.5 to 500 micrometres in diameter.
After revision: , also called Ugelstad particles after the Norwegian chemist John Ugelstad, who invented and patented them in 1977,Superparamagnetic microbeads: the monosized Dynabeads (scanning electron microscope image) Microbeads are uniform polymer particles, typically 0.5 to 500 micrometres in diameter.