uric acid/cariës

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Nitrogen dioxide-dependent oxidation of uric acid in the human oral cavity under acidic conditions: implications for its occurrence in acidic dental plaque.

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The pH in dental plaque falls to below 5 after the ingestion of foods, and it may remain low if acid-tolerant bacteria grow in the plaque. Certain nitrate-reducing bacteria in the oral cavity can proliferate in dental plaque at low pH, and nitrite is detected in such plaque. In acidic dental plaque,

Comparison of antioxidant enzymes activity and the concentration of uric acid in the saliva of patients with oral cavity cancer, odontogenic cysts and healthy subjects.

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Chronic inflammation is related to oxidative stress and is still believed to be the cause of carcinogenesis. Patients with oral cavity cancer (OCC) exhibited lower total antioxidant capacity, uric acid (UA) concentration, salivary peroxidise (SPO) and superoxide dismutase (SOD) activity in their

Parotid fluid and serum uric acid and total protein in relation to dental caries experience.

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[Levels of sodium, potassium, chloride, inorganic phosphate, calcium, glucose, uric acid, urea N and creatinine in the saliva of healthy children with low and high caries activity].

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Transfer and dynamics of uric acid in the pregnant rhesus monkey. II. A mathematical model.

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The objective of the present study was to develop a mathematical model of the dynamics of uric acid between fetal and maternal compartments in the term pregnant rhesus monkey. In 3 different animals 14C-labeled uric acid was injected into the fetal circulation, the amniotic fluid and the maternal

Real-time in vivo uric acid biosensor system for biophysical monitoring of birds.

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Research on birds has long played an important role in ecological investigations, as birds are relatively easily observed, and their high metabolic rates and diurnal habits make them quite evidently responsive to changes in their environments. A mechanistic understanding of such avian responses

Evaluation of the status of salivary antioxidants in dental caries.

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Dental caries is one of the most common, communicable and infectious disease worldwide. Oxidative stress may play a role in caries pathogenesis and salivary antioxidants may play a preventive role on dental caries. The aim of this study was to evaluate salivary superoxide dismutase,

Production of nitric oxide-derived reactive nitrogen species in human oral cavity and their scavenging by salivary redox components.

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Nitrite is reduced to nitric oxide (NO) in the oral cavity. The NO generated can react with molecular oxygen producing reactive nitrogen species. In this study, reduction of nitrite to NO was observed in bacterial fractions of saliva and whole saliva. Formation of reactive nitrogen species from NO

[Effect of urea and uric acid on the hemolytic activity of Sendai virus].

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It was found that haemolytic activity of Fushimi strain of Sendai virus multiplied in allantoic cavity of chicken embryos is independent on its haemagglutinating titer and also on allantoic fluid urea and uric acid content. It was shown in experiments with embryonated eggs that these two compounds

Effect of urea and uric acid on influenza virus type C. Brief report.

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The replication of influenza type C/1233 virus following inoculation into the amniotic sac of embryonated hen's eggs is significantly greater than that seen in the allantoic cavity. However, optimal growth condition for amniotically propagated C/1233 occur in the allantois of 8-day old embryos

Antioxidative phytochemicals from Rhododendron oldhamii Maxim. leaf extracts reduce serum uric acid levels in potassium oxonate-induced hyperuricemic mice.

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BACKGROUND Some of the genus Rhododendron was used in traditional medicine for arthritis, acute and chronic bronchitis, asthma, pain, inflammation, rheumatism, hypertension and metabolic diseases and many species of the genus Rhododendron contain a large number of phenolic compounds and antioxidant

[Dissolution of obstructive uric acid calculi by percutaneous nephrostomy and in situ alkalinization].

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Following the introduction of one or two percutaneous nephrostomy drains, 16 obstructive uric acid calculi were treated by perfusion of excretory cavities with 14% sodium bicarbonate solution. Twelve calculi had dissolved within an average of 5 days, 1 required percutaneous lithotripsy because of

Uric acid calculi: types, etiology and mechanisms of formation.

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The study of the composition and structure of 41 stones composed of uric acid was complemented by in vitro investigation of the crystallization of uric acid. Uric acid dihydrate (UAD) precipitates from synthetic urine under physiological conditions when the medium is supersaturated with respect to

Structure of uric acid concretion developed around a catheter.

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A uric acid concretion formed round a catheter (JJ stent) in the bladder and removed intact from the body together with the catheter was studied using an electron scanning microscope. The concretion was composed of anhydrous uric acid, some uric acid dihydrate (< 5 wt.%) and individual particles of

Role of uric acid in different types of calcium oxalate renal calculi.

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OBJECTIVE The presence of uric acid in the beginning zone of different types of 'pure' calcium oxalate renal calculi was evaluated with the aim of establishing the degree of participation of uric acid crystals in the formation of such calculi. METHODS The core or fragment of different types of

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