نتایج جستجو برای: fluoride concentration

تعداد نتایج: 398979  

2012
Alberto Carlos Botazzo DELBEM Maurício BERGAMASCHI Eliana RODRIGUES Kikue Takebayashi SASSAKI Ana Elisa de Mello VIEIRA Emilene Macario Coimbra MISSEL

UNLABELLED Because of the growing concerns regarding fluoride ingestion by young children and dental fluorosis, it is necessary to develop new dentifrices. OBJECTIVE The aim of this study was to evaluate the effect of dentifrices with calcium citrate (Cacit) and sodium trimetaphosphate (TMP) on enamel demineralization. MATERIAL AND METHODS Enamel blocks (n=70), previously selected through s...

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 2005
mahmoud bayat abbas taeb saeed rastegar

crystallization of aluminum fluoride at atmospheric pressure has been considered. structure, size and shape of crystals formed during the crystallization process have been investigated. by applying the direct analysis method for the existed aluminum in solution, the aluminum fluoride nucleation process has been detected as a concentration valley at the outset of crystallization process. the lin...

Journal: :Kidney international 1974
W J Johnson D R Taves

The safety of fluoridated community water supplies for dialysate and long-term intermittent hemodialysis has been questioned since 1965 [1]. The only significant means of clearing fluoride from body fluids are renal excretion and incorporation into bone [2]. When dialysate is prepared with fluoridated water, fluoride ion moves along a concentration gradient from dialysate to blood [3, 4]. Becau...

Journal: :Crystals 2023

In the current study, we sought to evaluate effects of phosphoryl-oligosaccharides calcium (POs-Ca) and/or fluoride-containing toothpaste on enamel. Six groups experimental were prepared by adding various concentrations POs-Ca fluoride. A 5 × 10-mm window enamel bovine incisor was immersed in resin and divided into three areas for “sound”, “demineralized (DEM)”, “after pH cycle (aft. cycle)”. A...

Journal: :International journal of clinical and experimental medicine 2015
Ya-Lou Zhang Qin Luo Qiang Deng Tian Li Yan Li Zhi-Lu Zhang Jin-Jie Zhong

This study aims to explore the potential pathways and molecular characteristics of fluorine-induced osteoblast apoptosis. In vitro fluorine-induced model was established with an osteogenesis sarcoma cell line Saos-2. Then flow cytometry was used to determine the mitochondrial membrane potential at 24 h after the intervention. 84 apoptosis-related genes in the cells were determined using the fun...

Journal: :Clinical chemistry 1979
L Singer R H Ophaug

We found no significant difference between the means for ionic, bound, and total fluoride concentrations in the plasma of male and female subjects of the same age, living in a community with fluoridated water. When results for the 264 fasting subjects were therefore combined according to age, they indicated that persons over 60 years of age have a significantly higher mean ionic (3.89 mumol/L) ...

Journal: :Chemical communications 2011
Sébastien Rochat Kay Severin

A simple assay for the detection of fluoride in water by fluorescence spectroscopy was developed. The assay is based on commercially available reagents and allows sensing of fluoride in the low millimolar concentration range with high selectivity over other anions.

Journal: :international journal of environmental research 2010
a. rahmani j. nouri s. kamal ghadiri a.h. mahvi r. zarem

besides human dental and skeletal fluorosis, drinking water above permissible levels of fluoride is known to cause a wide range of adverse health effects. in this study, the adsorption of fluoride from aqueous solution onto pretreated zeolite has been studied by using batch test. the large surface area of natural zeolite (i. e., clinoptilolite from miyaneh region, iran) was utilized to create a...

Journal: :Toxicology and industrial health 2011
Rupal A Vasant Mona C Khajuria A V R L Narasimhacharya

Fluoride toxicity occurs due to high concentrations of fluoride in water sources or anthropogenic causes. The aim of the present study was to investigate the effects of an Ayurvedic drug--Pankajakasthuri (PK)--in relation to fluoride-induced toxicity in mammalian lungs. The results indicated that sodium fluoride increased lipid peroxidation and decreased enzymatic and non-enzymatic antioxidants...

2012
Elsa Vasquez Graciela Zegarra Edgar Chirinos Jorge L Castillo Donald R Taves Gene E Watson Russell Dills Lloyd L Mancl Peter Milgrom

BACKGROUND There is growing interest in the use of diammine silver fluoride (DSF) as a topical agent to treat dentin hypersensitivity and dental caries as gauged by increasing published research from many parts of the world. While DSF has been available in various formulations for many years, most of its pharmacokinetic aspects within the therapeutic concentration range have never been fully ch...

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