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Measurement of contact angle (CA) of phosphate buffer saline (PBS) (Left side column indicating: Control) and CMC solution (80 μg/ml prepared in PBS) of biosurfactant obtained from Pseudomonas aeruginosa RTE4 (right side column indicating: test) on Glass (first row), Parafilm (second row), OHP sheet (third row), and Teflon (fourth row).
