title: Effects of temperature on the removal of urea as ammonia by enzymatic conversion and by gas absorption using an oxygenator.
abstract: Urea in dialysate solution was converted by urease into ammonium and bicarbonate. Ammonium and bicarbonate can be removed using a gas absorption unit (e.g. oxygenator) to remove ammonia gas and carbon dioxide. The times for the total ammonium levels in the dialysate to be lowered by 50% were 95 minutes at 25 degree C and 15 minutes at 60 degree C. Increasing the dialysate temperature alone was effective in increasing the removal of ammonium, without the need to add NaOH.
mesh_terms: D000042:Absorption; D000641:Ammonia; D001639:Bicarbonates; D055598:Chemical Phenomena; D002621:Chemistry; D006801:Humans; D007688:Kidneys, Artificial; D010106:Oxygenators; D013696:Temperature; D014508:Urea; D014510:Urease / Q000378:metabolism*
chemical_list: D001639:Bicarbonates; D000641:Ammonia; D014508:Urea; D014510:Urease