… Because the Fearon reaction is not specific for urea, but … of blood and three samples of urine
were treated with an excess … with tungstic acid, thefiltrates were analyzed for residual urea …

… This method seems to estimate only 94 % of the total urea and as this figure was very
constant with the standard urea solutions, and the values for urea in urine by this method were …

… , for the urine urea excretion is much less during the night than during the day, a finding
directly opposite to that which would be expected if variation in this factor caused the blood urea …

Several methods for determining urea in blood and urine are in use in clinical laboratories,
but none is ideal in mass routine analysis. The spectrophotometric method based on a …

… urine, only 5 minutes are recommended for blood. In a study of the effect of blood cells on the
determination of urea … the true urea content of blood can be obtained only by the analysis of …

… of urea in blood and urine based upon the urea-p… By treating the blood and urine with
activated carbon, these … ifitrates of blood and urine are reacted with our modified Ehrlich reagent, …

A specific electrode is described for the direct assay of urea in blood and urine. The electrode
is prepared by immobilizing a layer of urease in polyacrylamide over the surface of a …

… tubular luminal concentration of urea, allowing the concentration of urea in the urine to be …
in the blood. While the concentration ofthe urea in the urine is high, the actual amount of urea …

… to the blood urea content. Expressed in other words, with abundant urine the urea -excretion
per minute equals the urea contained in a constant volume of blood. This volume of …

… "an economy of water in renal function referable to urea." Recently, experiments in the rat …
urine volume required toexcrete a given solute load is reduced when urea is a principal urinary …