HF is a corrosive mineral acid. It has extremely harmful systemic effects through any route of exposure. In dilute solutions the onset of symptoms is latent. It is important for caregivers to remember that HF has distinct clinical signs and a specific antidote, namely calcium gluconate. The industrial use of HF heightens the importance of being prepared for possible exposures. The emergency medical teams should be familiar with its symptoms, should possess the proper protective means and should be ready to respond properly in case of emergency.
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Charcoal dentifrices: A laboratory study of their safety and efficacy.
Am J Dent
October 2024
University at Buffalo School of Dental Medicine, Buffalo, NY, USA,
Purpose: To compare charcoal-containing dentifrices (CDs) to non-charcoal containing dentifrices (NCDs) through the following experiments: potentially available fluoride, 1-minute fluoride release, pH, cytotoxicity, heavy metals, enamel fluoride uptake (EFU) and relative dentin abrasivity (RDA).
Methods: Nine fluoride dentifrices; six CDs and three NCDs were tested (n= 3) for available fluoride, the amount of fluoride released within 1 minute, pH cytotoxicity, heavy metals, EFU and RDA. Four CDs and 1 NCD contained sodium fluoride (NaF) as the active ingredient whereas two dentifrices contained stannous fluoride (SnF₂; 1 CD and 1 NCD), and two dentifrices contained disodium monofluorophosphate (Na₂FPO₃, or Na₂MFP; 1 CD and 1 NCD).
Article Synopsis
- Dental caries, a common disease caused by oral biofilms, affects nearly half of the global population despite the use of fluoride, although a new FDA-approved iron oxide nanozyme (ferumoxytol) shows promise in disrupting these biofilms.
- Combining ferumoxytol with stannous fluoride significantly enhances their effectiveness in preventing both biofilm accumulation and enamel damage, outperforming either treatment alone.
- The synergy between these two agents not only stabilizes the stannous fluoride but also improves its catalytic activity, demonstrating a novel method to combat dental caries without adverse effects on oral health or microbiome diversity.
Enhanced removal of phosphate using pomegranate peel-modified nickel‑lanthanum hydroxide.
Sci Total Environ
February 2022
Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao 266237, PR China.
In this work, a bimetallic Ni/La nanoparticle-laded biosorbent was fabricated from pomegranate fibers by solvothermal synthesis method. The material exhibited a high-efficient phosphate removal capability. The results of the characterization analysis showed that the surface of pomegranate fibers was rough and evenly coated with Ni and La after modification, and the specific surface area of Ni-La@Peel increased to 50.
View Article and Find Full Text PDFIn situ structural modification of bacterial cellulose by sodium fluoride.
Carbohydr Polym
March 2020
Institute of Chemicobiology and Functional Materials, School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, PR China. Electronic address:
Bacterial cellulose could be produced in any shape due to its high moldability during fermentation process, but structural modification often requires the inclusion of templates or other polymeric materials. In this work, sodium fluoride was introduced in bacterial cultivation process to modify the microstructure. Under static conditions, the final pH, BC yield, morphology, structure and properties of the obtained BC were investigated.
View Article and Find Full Text PDFHigh resolution crystal structure of a fluoride-inhibited organophosphate-degrading metallohydrolase.
J Inorg Biochem
December 2017
School of Chemistry and Molecular Biosciences, The University of Queensland, St. Lucia, Queensland 4072, Australia. Electronic address:
Metal ion-dependent, organophosphate-degrading enzymes (OP hydrolases) have received increasing attention due to their ability to degrade and thus detoxify commonly used pesticides and nerve agents such as sarin and VX. These enzymes thus garner strong potential as bioremediators. The OP hydrolase from Agrobacterium radiobacter (OpdA) is one of the most efficient members of this group of enzymes.
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