Electron impact (EI) tandem mass spectrometry (MS/MS) combined with EPR spin trapping was used to detect and identify the free radical metabolites of various halocarbons in rat liver microsomal dispersions. EPR spectra of the spin adducts of radical metabolites derived from fluorine-containing halocarbons display fluorine hyperfine splitting, which can be used as proof for the identification of...

Bioactive glass formed on the base sample (Go) of 45S5 system with fluorine additives samples were prepared by melt quenching method. The glassy samples were subjected to DTA for determining temperatures at which phase transition occur. FTTR spectroscopy shed a light on the sorts of compounds, their structure as well as their functional groups. The crystalline nature of samples was confirmed by...

A field investigation was carried in cattle in the vicinity of Aluminium industry and Fertilizers unit situated in the Eloor industrial belt of Ernakulam district, Kerala. Clinical surveys were conducted in randomly selected 119 cattle aged three years and above. Blood and urine samples were collected from the randomly selected thirty cattle, aged three years and above and the fluorine content ...

The fluorine atom concentration has been measured in the downstream region of a low-temperature, atmospheric-pressure plasma fed with 739.0 Torr helium and 12.6 Torr carbon tetrafluoride (3.1 × 1017 cm−3). The fluorine atoms were titrated with H2 molecules, and the HF reaction product was detected by infrared spectroscopy. The radio-frequency gas discharge produced 1.2 × 1015 cm−3 of F atoms, w...

Introduction: F-labelled cells provide an important new technique to evaluate in vivo the migration of implanted cells such as in stem cell therapy [1]. F-marker substances such as perfluorocarbons (PFC ) have been used for cell tracking based on F spectroscopy [2]as well as F magnetic resonance imaging (MRI). We present first results of F MRI of fibroblasts and neuroblastoma cells labeled with...

The development of advanced flexible large-area electronics such as flexible displays and sensors will thrive on engineered functional ink formulations for printed electronics where the spontaneous arrangement of molecules aids the printing processes. Here we report a printable elastic conductor with a high initial conductivity of 738 S cm(-1) and a record high conductivity of 182 S cm(-1) when...

In absorption chromatography, fused peaks may arise due to incomplete resolution of two or more eluting species. In figure 1, the chromatogram of an inorganic multicomponent polluting substance, acquired by means of a Dionex Ionic chromatographic system, is shown. The problem consists in quantitative evaluation of fluorine content, whose retention time is 3 mn, on the basis of the measured chro...

Organofluorine compounds are widely used in many different applications, ranging from pharmaceuticals and agrochemicals to advanced materials and polymers. It has been recognised for many years that fluorine substitution can confer useful molecular properties such as enhanced stability and hydrophobicity. Another impact of fluorine substitution is to influence the conformations of organic molec...

The utilization of dentifrices with low fluorine concentration, for children under 6 years of age, has been suggested to reduce the risks of dental fluorosis. However, in order to have anticariogenic potential, the dentifrice should form loosely-bound fluorine (CaF2) on dental enamel. Considering that the formation of CaF2 is a function inversely related to pH, dentifrices with pH 5.5, with 275...

In the Centro de Ingeniería Sanitaria a process named ARCIS-UNR was developed for arsenic and fluorine removal from groundwater by means of coagulation with polyaluminium chloride (PACl) and double filtration. A treatment plant for 11,200 inhabitants was designed. During monitoring of the plant it was needed to get more data regarding removal mechanisms and relevant variables in coagulation-ads...