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.
(a–d) Sequence of photographs showing the movement of two seed particles in the sodium silicate solution near to the membrane with 0.275 M Na2SiO3 and a saturated solution of CoCl2. The particles are in the middle of the dashed circles. Field of view: 6.55 × 6.55 mm2. (Online version in colour.)
