| ultrafiltration | <procedure> Filtration under pressure. In the kidney, an ultrafiltrate is formed from plasma because the blood is at higher pressure than the lumen of the glomerulus. Also used experimentally to fractionate and concentrate solutions in the laboratory using selectively permeable artificial membranes. (18 Nov 1997) |
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| ultrafiltration coefficient | The filtration coefficient of a semipermeable membrane. (05 Mar 2000) |
| ultrafiltration fermenter | An apparatus for continuous fermentation that is run inconjunctionwith a continuous microfiltration system to constantly remove thelow-molecular-weight product of the fermentation. (09 Oct 1997) |