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. Author manuscript; available in PMC: 2022 Dec 19.
Published in final edited form as: J Vis Exp. 2021 Nov 17;(177):10.3791/63059. doi: 10.3791/63059

Figure 3: Effects of camera level and detection threshold on measured particle size and concentration of filtered and unfiltered samples.

Figure 3:

Mean (A) and Mode (B) particle size at combined camera levels 12, 13, 14 as the detection threshold was increased from 2 to 3 to 5 (n = 3), showing a significant decrease in particle sizes of the filtered samples. Particle concentrations (C) at combined camera levels 12, 13, 14 as the detection threshold was increased from 2 to 3 to 5) (n = 3), showing a concentration decrease as the detection threshold increased with no significant difference between filtered and unfiltered samples. Mean (D) and Mode (E) particle size at combined detection thresholds as the camera level increased from 12 to 14 (n = 3), showing a decrease in particle size of the filtered samples. Particle concentrations (F) at combined detection thresholds as camera levels increased from 12 to 14 (n = 3), showing a concentration increase as the camera level increases with no significant differences between filtered and unfiltered samples. Abbreviation: DT = detection threshold.