Development of photoactive biomaterial using modified fullerene nanoparticles.

Medical device-associated biofilm infections continue to pose a significant challenge for public health. These infections arise from biofilm accumulation on the device, hampering the antimicrobial treatment. In response, significant efforts have been made to design functional polymeric devices that possess antimicrobial properties, limiting or preventing biofilm formation.

Starch hydrolysis using maltogenase immobilized via different techniques.

A series of modified poly(urethane-urea) carriers for immobilization of maltogenase from Bacillus stearothermophilus were presented. Poly(urethane-urea) microparticles (PUU) from poly(vinyl alcohol) and isophorone diisocyanate were modified with ethylenediamine, glutaraldehyde, trichlorotriazine and gold nanoparticles (AuNPs). Covalent attachment of enzyme to carrier via active isocyanate, aldehyde or aromatic chlorine group or electrostatic adsorption to AuNPs was performed.

Catalytic properties of maltogenic α-amylase from Bacillus stearothermophilus immobilized onto poly(urethane urea) microparticles.

The immobilization of maltogenic α-amylase from Bacillus stearothermophilus (BsMa) onto novel porous poly(urethane urea) (PUU) microparticles synthesized from poly(vinyl alcohol) and isophorone diisocyanate was performed by covalent attachment to free isocyanate groups from PUU microparticles, or by physical adsorption of enzyme onto the surface of the carrier. The influence of structure, surface area and porosity of microparticles on the catalytic properties of immobilized BsMa was evaluated. The highest efficiency of immobilization of BsMa was found to be 72%.