A variety of membrane
in which hydrostatic pressure forces a liquid against a semipermeable membrane.
The term "ultrafiltration" was found in the following pages:
Thiomersal in influenza vaccine: more than just an adjuvant | EVISA's News
Directory of scientists: Vera I. Slaveykova
Tools for elemental speciation
Tools for elemental speciation analysis
Fractionation as a first step towards speciation analysis | EVISA's News