We demonstrate that purine restriction is associated with a decreased excretion of a number of uv-absorbing compounds-including uric acid, hypoxanthine, xanthine, adenine, pseudouridine, and 5-acetylamino-6-amino-3methyluracil-indicating that these compounds originate, at least partly, exogenously. Administration of allopurinol and oxipurinol is associated with a decreased excretion of uric aci...

Excretion rates of adrenaline and noradrenaline, performance in an audiovisual conflict test, and subjective reactions to the test as well as habitual response patterns were examined in 25 subjects. Subjects with high excretion rates of both hormones performed better during the entire stress session than did subjects with low excretion rates, the trend being particularly pronounced in respect t...

1. The relations between the concentration of plasma uric acid and urinary excretion of aldosterone, sodium and potassium, were studied in ten healthy males on a diet containing 160 mmol of sodium and 90 mmol of potassium per day. 2. Plasma uric acid correlated positively with aldosterone excretion and this correlation was statistically independent of sodium and potassium excretion. 3. Plasma u...

BACKGROUND Agreement between spot and 24-hour urine protein measurements is poor in kidney transplant recipients. We investigated whether using formulae to estimate creatinine excretion rate (eCER), rather than assuming a standard creatinine excretion rate, would improve the estimation of proteinuria from spot urine samples in kidney transplant recipients. METHODS We measured 24 hour urine pr...

A completely randomized experimental design was conducted to estimate ammonia excretion rate by red tilapia (Oreochromis sp.) during different stages of its growth in recirculating water system units typically designed to meet the experiment purposes. Eight weight groups each containing 75individuals of 20, 30, 40, 60, 80, 120, 180 and 200g average weight were considered as treatments in duplic...