Fig. 13
From: Effect of interface-active proteins on the salt crystal size in waterborne hybrid materials
Light microscopy of NaCl crystals formed after drying a droplet of a solution containing 375 mM NaCl, 5 mM Tris–HCl buffer, 375 mM acetic acid and 5 mg/mL collagen. (A) Overview image of the sample (×20 magnification), (B) detail of an “on salt” region (×300 magnification), (C) detail of the halo region (×200 magnification) and (D) detail of the region away from the salt (×500 magnification)