Influence of matrix porosity on the immobilization of penicillin acylase by radiation-induced polymerization

Radiation‐Induced Copolymerization of cis‐[PdCl2{CN(CH2)3‐OC(O)CHCH2}2]: A Novel Route to Organometallic Cross‐linked Copolymers Useful for Catalytic Applications

“…1 mL min-') by means of a syringe (needle inner diameter ca. 0.45 mm) into a cylindrical Pyrex vial (outer diameter 2 5 cm) containing an excess volume of petroleum ether maintained at -78'C [7]. The system was then irradiated with y-rays from a "Co source at a rate of 0.50 Gy s-for 17 h. Beadlike polymer particles were recovered, washed with ethanol and diethyl ether, and finally dried under vacuum.…”

Preparation of polymeric biomaterials with the aid of radiation-chemical methods

“…by means of low-temperature radiation-induced polymerisation have been described. 250 The influence of the monomer : enzyme ratio on the immobilisation was investigated. It was established that the rate of liberation of the enzyme is independent of the nature of the monomer, the degree of polymerisation, and the porosity, but does depend strongly on the presence in the system of the cross-linking agent tris(hydroxymethyl)propane trimethacrylate even in small amounts (*0.03% ± 0.04%).…”