منابع مشابه
Methylated purines in urinary stones.
BACKGROUND The aim of the study was to measure the content of methylated purines that appear as admixtures in uric acid stones. METHODS We analyzed urinary calculi from 48 residents of Western Pomerania who underwent surgery at the urology ward in Szczecin. Stone samples were dissolved in 0.1 mol/L NaOH. Extracts were diluted in 50 mmol/L KH(2)PO(4) and analyzed by reversed-phase HPLC with ul...
متن کاملUrinary purines in leukemia.
Urinary purine excretion has been determined for four normal subjects, for thirteen patients with different types of acute and chronic leukemia, and for one man with mycosis fungoides by means of paper chromatography. Differentiation between types of leukemia, based on punine excretion, was not conclusive. Increases in 1-methylhypoxanthine and 8-hydroxy-7-methylguanine in nearly all patients, a...
متن کاملFasting and urinary stones
Introduction: Fasting is considered as one of the most important practices of Islam, and according to Prophet Mohammad, fasting is obligatory upon Muslims. The aim of this study is to evaluate the effects of fasting on urinary stones. Materials and Methods:Very few studies have been carried out on urinary stones and the effect of Ramadan fasting. The sources of the present study are Medline and...
متن کاملMutational Synergism between Radiations and Methylated Purines in Escherichia Coli.
Doneson, Ira N. (University of Kansas, Lawrence), and Delbert M. Shankel. Mutational synergism between radiations and methylalted purines in Escherichia coli. J. Bacteriol. 87:61-67. 1964.-A synergistic mutational effect was demonstrated between low doses of ultraviolet light and the methylated purines caffeine, theophylline, and theobromine. Caffeine produced the greatest effect and theobromin...
متن کاملPatterns of excretion of methylated purines in hepatocellular carcinoma.
The quantities of total and free guanine, adenine, hypoxanthine, and six of their methylated derivatives and of 6-succinoaminopurine have been measured in urine speci mens from cases of hepatocellular carcinoma and cirrhosis of the liver, and from normal subjects. Total base was defined as the sum of the free purine plus the increment released by means of acid hydrolysis. Analyses were per form...
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ژورنال
عنوان ژورنال: Clinical Chemistry
سال: 2005
ISSN: 0009-9147,1530-8561
DOI: 10.1373/clinchem.2005.048033