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. Author manuscript; available in PMC: 2018 Jun 27.
Published in final edited form as: ACS Nano. 2017 Apr 26;11(6):5339–5343. doi: 10.1021/acsnano.7b00822

Figure 4.

Figure 4

Human olfactory detection studies. (A) Lipase activity test in the presence of the pro-fragrance SAEPE was carried out with six participants. SAEPE only and 5 mM Phosphate buffer were used as the negative control. The hydrolyzed form of SAEPE was used as the positive control (strong standard). Hydrolyzed SAEPE and SAEPE in the presence of uninhibited lipase are significantly different from the negative controls SAEPE alone (p<0.01 and p<0.01, respectively) after 15 minutes. (B) With ten participants, olfactory detection of E. coli at 102 and 104 cfu/mL were compared to the controls of just buffer and sensor only after 15 minutes. The olfactory signals from the vials which contained 102 and 104 cfu/mL of E. coli are significantly different from the signal from the sensor-only vial (p<0.001 and p<0.0001, respectively).