PMID- 18600653 OWN - NLM STAT- PubMed-not-MEDLINE DCOM- 20100520 LR - 20080707 IS - 0006-3592 (Print) IS - 0006-3592 (Linking) VI - 37 IP - 7 DP - 1991 Mar 25 TI - A novel magnetic silica support for use in chromatographic and enzymatic bioprocessing. PG - 614-26 AB - A limited number of support matrices have so far been developed for use in magnetically stabilized fluidized bed (MSFB) applications. We have developed a versatile magnetic silica support which can be derivatized readily for both adsorption chromatography and enzyme immobilization by well-known techniques. A magnetic pellicular bead is prepared by electrostatically depositing alternating layers of colloidal silica and cationic polymer onto macroscopic nickel core particles. The polymer is then burned out and the silica partially sintered to yield a porous shell with 5-80 m(2)/g of surface area. This magnetic composite was tested as a support for immobilizing invertase. Sucrose was continuously converted to its component monosaccharides with nearly constant activity over the first 8 days and retention of 50% of initial activity after 25 days. FAU - Goetz, V AU - Goetz V AD - Department of Chemical Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6393, USA. FAU - Remaud, M AU - Remaud M FAU - Graves, D J AU - Graves DJ LA - eng PT - Journal Article PL - United States TA - Biotechnol Bioeng JT - Biotechnology and bioengineering JID - 7502021 EDAT- 1991/03/25 00:00 MHDA- 1991/03/25 00:01 CRDT- 1991/03/25 00:00 PHST- 1991/03/25 00:00 [pubmed] PHST- 1991/03/25 00:01 [medline] PHST- 1991/03/25 00:00 [entrez] AID - 10.1002/bit.260370704 [doi] PST - ppublish SO - Biotechnol Bioeng. 1991 Mar 25;37(7):614-26. doi: 10.1002/bit.260370704.