latest news: in International
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Potential of preparing cement clinker by adding the fluorine-containing sludge into raw meal
Highlights A sustainable treatment of hazardous fluoride containing sludge was proposed. Fluorine-containing sludge improved burnability, mineral morphology and properties of produced clinker. Fluorine was combined with calcium in produced clinker and hydration products. Fluorine-containing sludge from semiconductor industries were one kind of hazardous wastes, there was hardly effective treatment to realize its safe disposal and […]
International Electronics Industry -
Comparison of new formulas of stannous fluoride toothpastes with other commercially available fluoridated toothpastes: A systematic review and meta-analysis of randomised controlled trials
Excerpts: Aim: The aim of this study was to systematically review and analyse the difference in efficacy of stannous fluoride toothpaste formulations in comparison to other fluoridated toothpastes without stannous fluoride. Materials and methods: A systematic search of the literature was performed according to PRISMA guidelines. A search strategy was developed to answer the study […]
International Toothpaste -
Repeated low-dose exposures to sarin disrupted the homeostasis of phospholipid and sphingolipid metabolism in guinea pig hippocampus.
Note from FAN: The molecular structure of Sarin: Highlights Repeated low-dose sarin disturbed the cognitive ability in guinea pigs. Sarin disturbed phospholipid and sphingolipid metabolism in hippocampus. Neuropathy target esterase plays an important role on phospholipid metabolism. Biological function of identified metabolites that against sarin lesions need to be studied. Abstract Repeated low-level exposure to […]
International Chemical Weapons -
Miners, smelters still divided on copper processing charges
Excerpt: “However, a third source involved in the talks said the problem for Freeport is that Grasberg’s concentrate will risk exceeding the maximum permitted fluorine content of 1,000 parts per million, or 0.1%, in top copper consumer China.” FILE PHOTO: Truck is seen on a road in the Grasberg copper and gold mine operated by […]
International Copper Smelter -
No promising antidote 25 years after the Tokyo subway sarin attack: A review.
Note from FAN: The molecular structure of Sarin: Highlights This year marks 25 years since the Tokyo subway sarin attack. 2-PAM is the most widely used antidote in hospitals despite poor BBB permeability. We are trying to develop a reactivator that can easily cross the BBB. There are still no promising oximes that are safe, […]
International Chemical Weapons -
Using sunlight to transform chemical manufacturing into ‘zero-waste’ industries
Chemical engineers have successfully manipulated carbon nitride to use sunlight to synthesize fluorine-based molecules, which are key building blocks of pharmaceutical products in a breakthrough on the path to the ‘holy grail’ of zero waste industry manufacturing. Researchers from The University of Manchester have discovered that simple manipulations of carbon nitride, a metal-free, non-toxic solid, […]
International Pharmaceuticals -
Activation of pentafluoropropane isomers at a nanoscopic aluminum chlorofluoride: hydrodefluorination versus dehydrofluorination
Abstract The hydrofluorocarbon 245 isomers, 1,1,1,3,3-pentafluoropropane, 1,1,1,2,2- pentafluoropropane, and 1,1,1,2,3-pentafluoropropane (HFC-245fa, HFC-245cb, and HFC-245eb) were activated through C–F bond activations using aluminium chlorofluoride (ACF) as a catalyst. The addition of the hydrogen source Et3SiH is necessary for the activation of the secondary and tertiary C–F bonds. Multiple C–F bond activations such as hydrodefluorinations and dehydrofluorinations […]
International Greenhouse/Ozone Gases -
The ban on the use of fluoride in biathlon will come into force from the season-2021/22
The ban on the use of fluoride in biathlon and cross-country skiing will come into force from the 2021/22 season, reports TASS citing the International Biathlon Union (IBU) and the International Ski Federation (FIS). It is noted that the start date of the ban was decided to be postponed to the season due to the […]
International -
Breast milk analysis detects both legacy and emerging fluorinated compounds
Scientists have analysed breast milk from women living in cities in China and Sweden to check for 20 per- and polyfluoroalkyl substances (PFASs). The study detected significant levels of legacy PFASs and alternatives to those older PFASs, and is one of the first studies to detect 9-chlorohexadecafluoro-3-oxanone-1-sulfonic acid (F53-B) and 3H-Perfluoro-3-[(3-methoxy-propoxy)propanoic acid] (ADONA) in human […]
International Perfluorinated chemicals -
Fluoride containing water: A global perspective and a pursuit to sustainable water defluoridation management -an overview.
Highlights Fluoride level in natural waters can be exceedingly high reaching 2800 ppm F–. Contaminated water and diseases caused by fluoride are prevalent worldwide. Recent fluoride removal studies are mostly on the bench-scale phase. Investigated techniques usually omit high F– concentration wastewater (>100 ppm). Life cycle assessment and cost evaluation for defluoridation are deemed vital. […]
International Water Treatment