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.
Macroporous commercial silicon nitride microsives purchased from Aquamarijn Micro Filtration BV (Zutphen, Netherlands), having on top a Si3N4 membrane (5 mm × 5 mm × 0.6 mm) with macropores arranged in a hexagonal setting and diameter of 5 μm.
