Little is known about the effect of fluorides on bacteria. In large concentrations inorganic and organic fluoride compounds inhibit growth. Fluorine is not known to be an essential trace element for bacteria, fungi, or algae. Recently Davis and Dubos (1947) have shown that fluoride inhibits the action of a lipase on "tween 80" in concentrations that do not affect the growth of Mycobacterium tub...

The aims of this study were to evaluate the fluorine depth profiles of pure titanium (Ti), stainless steel (SUS), and polymethyl methacrylate (PMMA) modified by plasma-based fluorine ion implantation and the effects of fluorine ion implantation on contact angle, fluoride ion release, and S. mutans adhesion. Fluorine-based gases used were Ar+F2 and CF4. By means of SIMS, it was found that the pe...

Abstract. In Thailand, the consumption of soy milk products is common but there is limited data about their fluoride content. The purpose of this study was to es- timate the fluoride content of soy milk products available in Thailand. Fluoride content was determined for 76 brands of soy milk using a F-ion-specific electrode. The fluoride concentrations ranged from 0.01 to 3.78 μg/ml. The fluori...

New rhodamine based molecules have been designed as dual probes for the ppb-level selective detection of Hg(2+) and F(-) ions in aqueous medium at physiological pH 7.4. The probes have been designed in such a way to utilize both the properties of the metal ion induced 'turn-on' detection mechanism of the spirolactam ring opening of the rhodamine moiety and the reaction based cleavage of the O-s...

background: the human body gets fluorine from a variety of sources including food and water. this element is essential in order to prevent tooth decay. however, high concentrations of this element led to a lot of dental fluorosis and skeletal injuries. this study aimed to measure the concentration of fluoride in water and tea consumed in the city of qom. methods: the present study is cross-sect...

Previous reports found that some fluoride-containing dentifrices do not release effective concentrations of fluoride during brushing. Failure to release fluoride can be due to dentifrice matrix components that interfere with the solubilization of the fluoride salts during brushing. A new generation of dentifrices has the capability to precipitate beneficial fluoride salts during tooth brushing....

previous studies have indicated that there may be a relationship between the salivary fluoride concentrations and dental caries while the emphasis was on dental caries in permanent teeth. the aim of this study was to assess the prevalence of dental caries and its predictors in 3-6 year-old children in tehran, iran. the other objective of this investigation was to clarify a relationship between ...

Breakfast cereals and snacks are foodstuffs highly appreciated by children, and the possibility that they contain substantial amounts of fluoride, associated with their widespread consume, may make them important contributors to the total daily fluoride intake. The aim of this study was to analyze the fluoride content on several breakfast cereals (A) and snacks (B) purchased in Brazil. The anal...

0 Fluoride contamination occurs in a wide range of industrial effluents-wastewater from aluminum and steel production, metal finishing and electroplating, glass and semiconductor manufacturing, ore-beneficiation, and fertilizer operations. Concentration limits for fluoride of 1.0 to 1.5 mg/L have been established from time to time for surface waters, based upon two premises: (1) that these wate...