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Characteristic of immobilized cells before biosurfactant production (A,B), after the 1st production cycle (C,D) and after the 3rd production cycle (E,F). The 3000X magnified image is shown on the left while the 10000X magnified image is displayed on the right. The immobilized cells from the 1st and 2nd biosurfactant production cycles were reused without washing process.
