Preparation of a Nanoemulsion with Carapa guianensis Aublet (Meliaceae) Oil by a Low-Energy/Solvent-Free Method and Evaluation of Its Preliminary Residual Larvicidal Activity

Figure 4

Set of emulsions prepared with C. guianensis oil and single surfactants or blends as follows (from left to right): polysorbate 81 (HLB = 10), polysorbate 85 (HLB 11), polysorbate 80/polysorbate 85 (HLB = 11.5), polysorbate 20/polysorbate 81 (HLB = 12), polysorbate 20/polysorbate 85 (HLB = 12), polysorbate 80/polysorbate 81 (HLB = 12), polysorbate 80/polysorbate 85 (HLB = 12), and polysorbate 80/polysorbate 85 (HLB = 12.5). (a) represents macroscopical characteristic of the emulsions on the day of preparation. (b) represents macroscopical characteristic of the emulsions after 7 days of storage (25°C).

(a)

(b)