Isolation and Characterization of Biosurfactant-Producing Bacteria from Amapaense Amazon Soils

Figure 2

Schematic representation of the qualitative tests used to evaluate the isolated bacterial strains’ capacity to produce biosurfactants: (a) drop collapse test, where 1Q, 2Q, 3Q, and 4Q represent the first, second, third, and fourth quadrants; (b) oil dispersion test.

(a)

(b)