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Bladzijde 1 van 673 resultaten
[Influence of urease activity of the oral cavity and oropharynx on 13C-urea breath test].
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We examined whether 13C-urea breath test with powdered 13C-Urea is affected with urease activity in the oral cavity and oropharynx in H. pylori negative cases. We also examined whether the degree of gargling affects the results of 13C-UBT. The results demonstrated that the urease activity not only
Fluoride and urea chewing gums in an intra-oral experimental caries model.
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The aim of the present investigation was to evaluate the effect of sugar-free chewing gums containing fluoride (F) and urea in an intra-oral experimental caries model. Placebo chewing gums (without any active ingredient) and no gum served as controls. Fifteen subjects participated in a cross-over,
Bis-urea macrocycles with a deep cavity.
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Two configurational isomers of bis-urea macrocycles have been synthesized, and their neutral molecule recognition was studied by X-ray crystallography and (1)H NMR experiments. Cooperative action between the deep cavity and the urea groups and the influence of dipole alignments on molecular
Preparation of molecularly imprinted polymer containing selective cavities for urea molecule and its application for urea extraction.
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A new molecularly imprinted polymer material having urea molecule selective cavities was introduced. Urea was properly dissolved in acetonitrile in the presence of an acidic functional monomer. Molecularly imprinted polymers with different compositions were examined and the roper formulation was
Correlation between salivary urea level and dental caries.
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OBJECTIVE
The aim of this study was to determine the values of salivary urea in subjects with different caries activity.
METHODS
The planned trials were conducted in 80 children of both sexes, aged 16 years, with different caries activity. Based on the condition of teeth, the DMFT-index, respondents
Plaque pH in caries-free and caries-active young individuals before and after frequent rinses with sucrose and urea solution.
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OBJECTIVE
To examine pH in the approximal dental biofilm after acid and alkali formation from sucrose and urea, after an adaptation period to these substances, in caries-free (CF) and caries-active (CA) individuals. Saliva flow and buffer capacity, and aciduric bacteria in saliva and plaque were
Correlations of oral bacterial arginine and urea catabolism with caries experience.
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OBJECTIVE
Alkali generation by oral bacteria plays a key role in plaque pH homeostasis and may be a major impediment to the development of dental caries. To determine if the capacity of oral samples to produce ammonia from arginine or urea was related to caries experience, the arginine deiminase
Ammonia, urea and dental caries.
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A preliminary clinical report of caries control with a high urea ammoniated dentifrice.
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An experimental study on caries activity. 1. Effects of urea.
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[Caries prophylactic studies with hydrogen peroxide urea and sodium fluoride].
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High-urea ammoniated dentifrice: caries reduction through four years' home use.
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[Treatment of residual cavities in thoracoplasty by directed endocavitary injections of quinine urea salts].
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Two year clinical study of caries control with high-urea ammoniated dentifrice.
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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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