Simultaneous Adsorption and Fixation of Aspergillus oryzae β-Galactosidase on Polyelectrolyte-Layered Polysulfone Hollow-Fiber Membrane

Immobilization of Perylene-3,4,9,10-Tetracarboxylic Dianhydride on Hollow Polysulfone Fibers: Primary Amine Coupling and Fluorescence Reporting

The fluorescent dye perylene-3,4,9,10-tetracarboxylic dianhydride (PBA) was immobilized onto polysulfone hollow fibers by means of a wet coating procedure. After immobilization, PBA was able to react with primary amines through a double anhydride ring opening reaction. The in situ amine coupling was further revealed by fluorescence analysis. Both emission (534 nm →538 nm) and fluorescence lifetime changes (2.7 ns →3.3 ns) of the dye are a useful tool to detect and visualize the occurrence of the reaction. The successful implementation of amine coupling with a reporting function on polysulfone fibers holds great interest for biomedical applications.

The effect of transmembrane pressure and feed flow rate on transgalactosylation of lactose in an enzymatic membrane reactor

The hydrolysis and transgalactosylation reaction of lactose in enzymatic membrane reactor (EMR) with immobilized β-gal is affected by transmembrane pressure (TMP) and feed flow rate.