BACKGROUND The recent introduction of urea sensors for dialysis monitoring has made possible new approaches to urea kinetic modelling. In this study we show how the equilibrated postdialysis urea concentration (Ceq) and Kt/V corrected for double-pool urea kinetics (Kt/Vdp) can be accurately determined using an on-line sensor providing a continuous measure of blood water urea. A modification of ...

the physiological effects of a diet free of meat and eggs were studied. fifteen adult lacto-vegetarians were matched with non-vegetarian individuals by age, sex, body weight and height. a two-week dietary record was secured from each individual. the food consumed over a 48-hour period was measured. venous blood samples were taken from each individual for determination of serum total protein, ur...

Flow injection analysis instrumentation and methodology for the determination of ammonia and ammonium ions in an aqueous solution are described. Using in-line solid phase basification beds containing crystalline media. the speciation of ammoniacal nitrogen is shifted toward the un-ionized form. which diffuses in the gas phase across a hydrophobic microporous hollow fiber membrane into a pure-wa...

Trials were started in spring, summer and autumn to compare the effect of Agrotain-treated urea and standard urea, at application rates of 25, 50, 75 and 100 kg N/ha, on dairy pasture production on a commercial dairy farm in Canterbury. There were six replicates of these eight treatments, plus two control plots per replicate where no urea was applied. Each trial was mown three times at around t...

An improved method for the colorimetric determination of urea is described. The method is simple, requiring a deproteinized filtrate obtained after treatment of a small quantity of whole oxalated blood, serum, plasma or urine with 12.5% trichloracetic acid containing 50 g. activated carbon. The addition of Ehrlich's reagent to this filtrate results in the immediate production of a stable yellow...

Fast and accurate determination of creatinine is critical in kidney function diagnostics. This paper discusses the usage metal-organic framework based on copper(II) acetylenedicarboxylic acid (CuADCA) as a catalyst electrochemical oxidation creatinine, glucose urea. CuADCA was synthesized by deprotonation with triethylamine for first time. Successful synthesis confirmed FTIR EDS. The material c...