نتایج جستجو برای: fluoride ion
تعداد نتایج: 223952 فیلتر نتایج به سال:
Background and purpose: Fluoride is one of the drinking water contaminants regulated by EPA. This ion, in low doses in the mouth reduces tooth decay without health risk and at much higher doses causes health complications and can be toxic. The major sources of exposure to fluoride are drinking water, food, dental products, and pesticides. The biggest contributor to exposure for most people in I...
Diaryliodonium salts are shown to undergo rapid, fluoride-promoted aryl exchange reactions at room temperature in acetonitrile. Aryl exchange is shown to be exquisitely sensitive to the concentration of fluoride ion in solution; fast exchange is observed as the fluoride concentration approaches a stoichiometric amount at 50 mM substrate concentration. The reaction is slowed, but not halted if b...
objectives: fluoride therapy is important for control and prevention of dental caries. laser irradiation can increase fluoride uptake especially when combined with topical fluoride application. the objective of this study was to compare the effects of co 2 and diode lasers on enamel fluoride uptake in primary teeth. materials and methods: forty human primary molars were randomly assigned to fou...
A biocompatible fluoride receptor has been developed where the interaction between the boronic acid ester and amine (NH) results in fluoride ion selectivity and enhanced fluorescence quenching.
AIM The aim of the present study was to evaluate the relationship of drinking water fluoride levels with children's intelligence quotient (IQ). MATERIALS AND METHODS Water was collected from initially identified endemic fluoride regions according to the geological research of Government of India. Fluoride concentration of the water was assessed by utilizing fluoride ion selective electrode, O...
Serum concentrations and urinary excretion of inorganic fluoride (fluoride ion), a metabolite of sevoflurane, were measured by an ion-chromatographic analyzer after inhalation of three different concentrations of sevoflurane in adult, male Japanese white rabbits weighing 2.6-3.6 kg. Sevoflurane was administered at concentrations of 0% (control), 1%, 2% and 3% (Groups I, II, III and IV, respecti...
The fluoride content of commercially prepared strained fruit juices was assessed using a fluoride ion-specific electrode in conjunction with a reference electrode. Most of the products contained less than 0.33 gg of fluoride per ml, but six of the 18 products contained more than 0.50 gg of fluoride per ml. When used in normal quantities, the fluoride content of commercially prepared strained fr...
background and purpose: fluoride is one of the drinking water contaminants regulated by epa. this ion, in low doses in the mouth reduces tooth decay without health risk and at much higher doses causes health complications and can be toxic. the major sources of exposure to fluoride are drinking water, food, dental products, and pesticides. the biggest contributor to exposure for most people in i...
We describe a patient with tetanus, who received isoflurane for sedation to facilitate controlled mechanical ventilation. Isoflurane was administered for 34 days, resulting in a sustained serum inorganic fluoride ion concentration in excess of 50 mumol litre-1 and a peak serum inorganic fluoride ion concentration of 87 mumol litre-1. Although these concentrations are potentially nephrotoxic, no...
Fluorine is one of the most common elements in the Earth’s crust. Fluoride is recognized to be the most effective caries-preventive agent. The main sources of fluoride for people are generally food and drinking water. For this reason, the fluoride and also the metal ion (Ca, Cr, Cu, Fe, K, Mg, Mn, Na, Ni, Pb and Zn) concentrations in the drinking waters collected from the city center of Kayseri...
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