Search Results
Results 551 - 600 of 1755
< 7 8 9 10 11 12 13 14 15 16 17 >
Chiwa M - - 2004
Throughfall chemistry was studied in a mature Sitka spruce plantation in order to investigate canopy interactions, such as nitrogen absorption, cation leaching, and neutralization of rainfall passing through the canopy. The plantation had been exposed to six different simulated mist treatments including N (NH(4)NO(3)) and S (H(2)SO(4) at pH 2.5) ...
Lippi Giuseppe - - 2004
Owing to considerable physical, endocrinological and metabolic adaptations, the analysis of biochemical data in elite and top-class athletes requires caution. With the aim to identify metabolic and biochemical adaptations to particular lifestyle conditions, such as regular and strenuous physical exercise, we measured the concentration of serum albumin, creatinine, uric acid ...
Xu Fang - - 2004
Nannochloropsis sp. was grown under mixotrophic conditions with 30 mM glucose as carbon source, reaching 507 mg dry wt l(-1) after 8 d. This was 1.4-fold of that obtained under photoautotrophic conditions. Under mixotrophic and photoautotrophic cultivations, the net photosynthetic rate of Nannochloropsis sp. did not change but the respiratory ...
Marquette Christophe A - - 2003
A multifunctional bio-sensing chip was designed based on the electrochemiluminescent (ECL) detection of enzymatically produced hydrogen peroxide. Six different oxidases specific for choline, glucose, glutamate, lactate, lysine and urate were non-covalently immobilised on imidodiacetic acid chelating beads (glucose oxidase only) or on diethylaminoethyl (DEAE) anion exchanger beads, and spotted on ...
Ucar M - - 2004
OBJECTIVE: The aim of this study was to examine the effect of carbamazepine on the pharmacokinetics of orally administered simvastatin in healthy volunteers. METHODS: In a randomised, two-phase crossover study and a wash out of 2 weeks, 12 healthy volunteers took carbamazepine for 14 days (600 mg daily except 200 ...
Denzer Christian - - 2003
Hyperuricemia is part of the "metabolic syndrome". The aim of this study was to investigate the regulation and role of serum uric acid in the cardiovascular risk factor profile of obese children and adolescents. Serum levels of uric acid and selected risk factors and hormones were determined in 269 children ...
Martinez-Pérez David - - 2003
The simultaneous encapsulation of a coupled uricase-peroxidase system and amplex red in a sol-gel matrix allows one to obtain a reagent-less and ready-to-use fluorescent biosensor for the accurate detection of uric acid in highly diluted biological fluids. The detection limit of the prepared biosensor was found to be 20 nM ...
Trostchansky Andrés - - 2003
We have studied the role of three Mn(III)porphyrins differing in charge, alkyl substituent length and reactivity, on LDL exposed to low fluxes of peroxynitrite (PN) in the presence of uric acid. Mn(III)porphyrins (5 microM, MnTE-2-PyP(5+), MnTnOct-2-PyP(5+), and MnTCPP(3-)) plus uric acid (300 microM) inhibited cholesteryl ester hydroperoxide formation, changes in ...
Hoshi Tomonori - - 2003
Uricase (UOx) and polyelectrolyte were used for preparation of a permselective multilayer film and enzyme multilayer films on a platinum (Pt) electrode, allowing the detection of uric acid amperometrically. The polyelectrolyte multilayer (PEM) film composed of poly(allylamine) (PAA) and poly(vinyl sulfate) (PVS) were prepared via layer-by-layer assembly on the electrode, ...
Ward Richard A - - 2003
Dialyzer performance may change with reuse depending on whether or not the dialyzer is cleaned with bleach. Bleach is usually used in conjunction with formaldehyde as the germicide. Because few data are available for dialyzers cleaned with bleach and disinfected with peracetic acid, we examined dialyzer performance in a cross-over ...
Miao Wujian - - 2003
Anodic electrogenerated chemiluminescence (ECL) with tri-n-propylamine (TPrA) as a coreactant was used to determine DNA and C-reactive protein (CRP) by immobilizations on Au(111) electrodes using tris(2,2'-bipyridyl)ruthenium(II) (Ru(bpy)(3)(2+)) labels. A 23-mer synthetic single-stranded (ss) DNA derived from the Bacillus anthracis with an amino-modified group at the 5' end position was covalently ...
Bariol Simon - - 2003
PURPOSE: To compare biochemical analysis of stent encrustation with that of urinary stones from the same patient. PATIENTS AND METHODS: Any patient presenting from February to December 2000 with a symptomatic ureteral or renal calculus that necessitated stenting and delayed calculus retrieval was enrolled in the study. The stent and ...
Zotz Gerhard - - 2004
The occurrence of crassulacean acid metabolism (CAM) in the epiphyte community of a lowland forest of the Atlantic slope of Panama was investigated. I hypothesized that CAM is mostly found in orchids, of which many species are relatively small and/or rare. Thus, the relative proportion of species with CAM should ...
Gorman Gregory S - - 2003
Using [2-13C]uric acid as a test material, we developed a mass spectrometric procedure that detects and estimates the difference in 13C enrichment at the positions of carbons 2 and 8 of the purine ring. This method could replace radiochemical methods and could trace the incorporation of carbon fragments into the ...
Balasubramanian T - - 2003
In animals deprived of food for a long period, a drop in the fat mass below 5% of the total body mass results in an increase in blood glucocorticoids and uric acid levels, followed by foraging activity. Since the glucocorticoids increase the uric acid excretion, an increase in the level ...
Koguchi Takashi - - 2003
This study was performed to clarify how dietary fiber (DF) with different viscosities would be associated with dietary RNA metabolism. Male Wistar strain rats, four weeks old, were fed diets containing a 3% (w/w) yeast RNA and a 5% (w/w) viscous DF for five days. Viscosity of DF samples used, ...
Afzal Naeema - - 2003
BACKGROUND: The present study was undertaken to determine the uric acid profile in patients with unexplained chronic musculoskeletal complaints, and to establish any possible causal role for altered uric acid profile in such patients. METHOD: A comparative study of 36 patients and 36 controls of both sexes and ages between ...
Moriwaki Hiroshi - - 2003
Perfluorooctane sulfonate (PFOS) and perfluorooctanoic acid (PFOA) are shown to be globally distributed, environmentally persistent and bioaccumulative. Although there is evidence that these compounds exist in the serum of non-occupationally exposed humans, the pathways leading to the presence of PFOS and PFOA are not well characterized. The concentrations of PFOS ...
Koren Omry - - 2003
The biodegradation of hydrocarbon pollutants in open systems is limited by the availability of a utilizable nitrogen source. This limitation can be overcome by using uric acid. Enrichment cultures grown on crude oil-uric acid media yielded mixed and pure cultures that degraded petroleum. In a simulated open system, uric acid ...
Grove Robert A - - 2003
We report the first case of uric acid nephrolithiasis in a free-ranging river otter (Lontra canadensis). A 7 yr old male river otter collected from the Skagit River of western Washington (USA) had bilateral nephrolithiasis and severely enlarged ureters (one of 305 examined [0.33%]). The uroliths were 97% uric acid ...
Dimsdale J E - - 2003
OBJECTIVE: The four objectives of this study were to test the ability of a 1-item fatigue scale to correlate with the fatigue subscale of the Profile of Mood States (POMS), to test the acceptability of recording hourly fatigue ratings, to examine the chronobiological variation in self-reports of fatigue, and finally ...
Hwangbo Hoon - - 2003
Enterobacter intermedium, isolated from grass rhizosphere, exhibited a strong ability to solubilize insoluble phosphate. This bacterium oxidized glucose to gluconic acid and sequentially to 2-ketogluconic acid (2-KGA), which was identified using HPLC and GC-MS. The ability of E. intermedium to solubilize phosphate and produce 2-KGA produce in broth medium containing ...
Goldman Stanton C - - 2003
Acute tumor lysis syndrome with hyperuricemia and renal failure usually occurs during the initial period of chemotherapy in patients with aggressive hematological malignancies. Standard therapy for hyperuricemia includes hydration, urine alkalinization and pharmacoreduction of uric acid with allopurinol. In the USA, rasburicase has recently been approved by the US Food ...
Hossain Rayhan Zubair - - 2003
The aim of the present study was to investigate the composition of urinary tract stones in patients from Okinawa, the most southern island group of Japan. The study was conducted by 12 hospitals in Okinawa. A total of 1816 urinary tract calculi were obtained from 1816 patients (1323 males; 493 ...
Feliubadaló Lidia - - 2003
Cystinuria is a common recessive disorder of renal reabsorption of cystine and dibasic amino acids that results in urolithiasis of cystine. Cystinuria is caused by defects in the amino acid transport system b0,+ (i.e. the rBAT/b0,+AT heteromeric complex). Mutations in SLC3A1, encoding rBAT, cause cystinuria type A, characterized by a ...
García-Pavía Pablo - - 2003
Overactivity of phosphoribosylpyrophosphate synthetase (PRS) is an X chromosome-linked disorder of purine metabolism that is characterized by gout with uric acid overproduction and, in some families, neurodevelopmental impairment. We present the case of a 24-year-old Spanish woman with renal colic and hyperuricemia, which first manifested at age 11 years. Results ...
Martin Jonathan W - - 2003
Haloacetic acid (HAA) concentrations were measured in air samples from a semi-rural and a highly urbanized site in southern Ontario throughout 2000 to investigate their sources and gas-particle partitioning behavior. Denuders were efficient for collection of gaseous HAAs, and the particle phase was collected on a downstream quartz filter with ...
Yamada I - - 2003
1. To elucidate any potential species differences, the in vitro metabolism of pitavastatin and its lactone was studied with hepatic and renal microsomes from rats, dogs, rabbits, monkeys and humans. 2. With the addition of UDP-glucuronic acid to hepatic microsomes, pitavastatin lactone was identified as the main metabolite in several ...
Serra Pier Andrea - - 2003
The effects of either intraperitoneally (i.p.) or intrastriatally administered sufentanil on the release and metabolism of dopamine (DA) in the rat striatum were evaluated using in vivo microdialysis. Dialysate concentrations of DA and its acidic metabolites dihydroxyphenylacetic acid (DOPAC) and homovanillic acid (HVA) were increased following i.p. administration of either ...
Takahashi S - - 2003
OBJECTIVE: To assess the effect of a combination treatment using anti-hyperuricaemic agents with fenofibrate and/or losartan on uric acid metabolism in hypertriglyceridaemic and/or hypertensive patients with gout. METHODS: Twenty seven patients with gout were included in a fenofibrate plus anti-hyperuricaemic agents combination study, and 25 in a losartan plus anti-hyperuricaemic ...
Hines C J - - 2003
Endotoxin was measured in air and dust samples collected during four commercial aircraft flights. Samples were analyzed for endotoxin biological activity using the Limulus assay. 3-hydroxy fatty acids (3-OH FA) of carbon chain lengths C10:0-C18:0 were determined in dust by gas chromatography-ion trap tandem mass spectrometry. The geometric mean (geometric ...
Fischer Marc L - - 2003
Simultaneous temporally resolved indoor and outdoor measurements of ammonia and nitric acid are valuable for determining the gas-particle equilibrium conditions governing concentrations of ammonium nitrate aerosol. We report the results of simultaneous automated indoor and outdoor measurements of ammonia and nitric acid concentrations made at an unoccupied, single-story residence in ...
Schüssele Andrea - - 2003
Flowabilities of six commercially available, direct compression excipients, Emcompress, Fujicalin, Starch 1500, Avicel PH-102, Tablettose 80, and Tablettose 100 were examined according to the technical procedure described in the current European Pharmacopoeia, and with a Sotax Flow Tester. Results revealed unfavourable properties for Fujicalin compared to other substances. Fujicalin, however, ...
Kanellis John - - 2003
Previous studies have reported that uric acid stimulates vascular smooth muscle cell (VSMC) proliferation in vitro. We hypothesized that uric acid may also have direct proinflammatory effects on VSMCs. Crystal- and endotoxin-free uric acid was found to increase VSMC monocyte chemoattractant protein-1 (MCP-1) expression in a time- and dose-dependent manner, ...
Langlois Michel - - 2003
BACKGROUND: Uric acid is frequently elevated in hypertension. In addition to renal and metabolic disturbances, lower limb ischemia might contribute to hyperuricemia among hypertensives complicated by peripheral arterial disease (PAD). OBJECTIVE: To test the hypothesis that uric acid status is related to lower limb function in hypertensives with PAD. METHODS: ...
James Tim J - - 2003
Reactive oxygen species have been implicated in the impaired healing of chronic leg ulcers but little direct evidence is available. We have observed a significant (p < 0.01) elevation of the allantoin : uric acid percentage ratio, a marker of oxidative stress, in wound fluid from chronic leg ulcers (median ...
Shrewsbury M M - - 2003
Functional analysis of human pollical distal phalangeal (PDP) morphology is undertaken to establish a basis for the assessment of fossil hominid PDP morphology. Features that contribute to the effectiveness of grips involving the distal thumb and finger pulp areas include: 1) distal thumb interphalangeal joint morphology, facilitating PDP conjunct pronation ...
Peres Luis A B - - 2003
OBJECTIVE: To assess the prevalence of the main metabolic alterations found in patients with recent diagnosis of urolithiasis in the West region of Parana state, Brazil. MATERIALS AND METHODS: We made a retrospective study on 425 patients with evidence of recent formation of renal stones. Laboratory assessment consisted in 3 ...
Moyer Robert A - - 2003
Hypouricemia is seen in a variety of clinical situations. Although precipitation of gout is well known following initiation of uricosuric therapy, it has been reported rarely following the institution of total parenteral nutrition (TPN), despite its known uricosuric effect. We describe a patient who developed polyarticular gout on 2 occasions ...
Kajander E Olavi - - 2003
Kidney stone formation is a multifactorial disease in which the defence mechanisms and risk factors are imbalanced in favour of stone formation. We have proposed a novel infectious agent, mineral forming nanobacteria (NB), to be active nidi that attach to, invade and damage the urinary epithelium of collecting ducts and ...
Navolanic P M - - 2003
Renal precipitation of uric acid associated with tumor lysis syndrome (TLS) is a major complication in the management of leukemia, lymphoma, and other drug-sensitive cancers. Management of hyperuricema has historically consisted of administration of allopurinol, hydration, alkalinization to maintain pH between 7.0 and 7.3, and in some cases diuresis. Allopurinol, ...
Mangavel C - - 2003
The influence of a set of hydrophilic plasticizers varying in their chain length (ethyleneglycol and longer molecules) on the tensile strength and elongation at break of cast gluten films was studied. When considered on a molar basis (moles of plasticizer per mole of amino acid), the effect of the different ...
Telo João P - - 2003
The oxidation of uric and of four N-methyluric acids in aqueous solution was studied by EPR spectroscopy. The primary oxidising radicals react with uric acid and its methyl derivatives by formal hydrogen abstraction from an NH group to yield radical-anions in neutral or moderately basic solutions and the respective radical-dianions ...
Izzedine Hassane - - 2003
Fanconi's syndrome (FS) was first described by Lignac in 1924. Associated with numerous varieties of inherited and acquired conditions, FS is characterized by a generalized transport defect in the proximal tubules, leading to renal losses of glucose, phosphate, calcium, uric acid, amino acids, bicarbonates, and other organic compounds. Cardinal symptoms ...
Kim W K - - 2003
Inhibition of microbial uricase in poultry manure is critical to reduce NH3 volatilization, because hydrolysis of uric acid by microbial uricase is the first step in the production of NH3 gas in poultry manure. Three experiments were conducted to evaluate the effects of minerals on uricase activity and NH3 volatilization ...
Lee Burton W - - 2003
Pesticides, such as parathion, are metabolized by cytochrome p-450 system to paraoxon, which is a potent cholinesterase inhibitor. Paraoxonase (PON) catalyzes the hydrolysis of these toxic metabolites and protects against pesticide toxicity. A glutamine/arginine (Gln/Arg) polymorphism at amino acid position 192 of PON has been described. The Arg/Arg genotype is ...
Zhao Min - - 2003
A generic fill-and-flow channel biosensor with upstream electrodes to determine the extent of interferences in the sample is described. A pair of upstream electrodes poised at a suitable potential allows both the calculation of the extent of removal of interfering agents and the effect of interfering agents at the detector ...
Viitasalo Jukka - - 2003
Range in javelin throwing is determined by the release parameters and aerodynamic factors. The current study was designed to investigate the effects of release speed, release angle and uncorrected angle of attack measured at the foul line on the official javelin throwing result. The data were collected in international competitions ...
Demirel A - - 2003
The composition of urinary stones was predicted on the basis of the differences in their Hounsfield unit (HU) densities as detected by in vivo non-contrast helical computed tomography (NCHCT). A total of 87 stones, which had been obtained from patients admitted to the emergency department with acute flank pain, were ...
Lee Yong Suk - - 2003
Cutaneous microdialysis is a new tool for direct sampling and real-time monitoring in dermatological research. However, its use in general laboratory practice poses several problems, one of which is determination of the relative recovery of the target material. Uric acid, one of the major antioxidants in the skin, was analysed ...
< 7 8 9 10 11 12 13 14 15 16 17 >