Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Before and after images of a typical spreading experiment with a 2 µl droplet of a 2 mM SDS solution containing erythrosine B dye placed on the center of the PGM subphase. Each particle is marked by a black dot in the image for ease of viewing. For scale reference: the Petri dish is 14 cm in diameter. Note that innermost tracer particles are swept outward by the spread of the dye solution.
