Fig. 6
Screenshots of aggregates (outlined in black) viewed with ILM images for different aggregative conditions. The images are obtained by adjusting the viewing parameters of the software between the interference patterns (background formed by black and white dots) and the optical microscopy image (scale provided at the bottom right of the image and retraced to improve readability). (a) Suspension acidified to pH 3 (mean aggregative score of 2.6/3.0); scale bars, 1 µm. (b) Suspension alkalised to pH 12 (mean aggregative score of 1.1/3.0); scale bars, 5 µm. (c) Suspensions maintained for 4 days at 40 °C (mean aggregative score of 2.1/3.0); scale bars, 1 µm. Some artefacts are visible in the images, particularly in images (a) and (c), i.e., concentric circles.
