Bionized NanoFerrite particles

are prepared via the core-shell method with a core of 75-80% (w/w) magnetite and a shell of dextran or hydroxyethyl starch, are available with particle diameters of 80 nm and 100 nm, are thermally blocked at room temperature and show specific interaction with alternating magnetic fields (Dennis et al. 2008 und 2009; Krycka et al., 2011; Bordelon et al., 2011), 100 nm BNF particles can be separated with conventional permanent magnets, 80 nm BNF particles have to be separated in high gradient magnetic fields or for several hours at a strong permanent magnet, are designed with the surface functionalities OH (plain), NH2, PEG-NH2, COOH and PEG-COOH for the covalent binding of proteins, antibodies or other molecules, are available with covalently bound proteins (streptavidin, protein A), can be provided with covalently bound antibodies on request, can easily be filtered through 0.22 µm filters.