Bacterial use of biofilms cross-linked by gamma irradiation

Gamma-irradiation was used to produce sterile free-standing biodegradable c aseinate films. The effect of irradiation doses (i.e. number of cross-links ) on the bacterial use of these films using a strain of Pseudomonas aerugin osa was investigated. Results showed that the main difference in overall ut ilisation for both films (4 or 64 kGy) was observed in terms of period of u tilisation which was delayed 8 days for the film containing the highest num ber of cross-links (64 kCy). (C) 2000 Elsevier Science Ltd. All rights rese rved.