2. Material and methods
2.1. Materials
An alkaline grade gelatin Type-B from bovine skin 225 Bloom
(SigmaeAldrich, Steinheim, Germany) was used. The average molecular weight of gelatin was Mv ¼1:0$10
5
g=mol. pH at the isoelectric point was 4.9.
Samples ofk-carrageenan (SigmaeAldrich) with average molecular weight Mv ¼6:8$10
5
g=mol was used without additional
purification.