HF-free low temperature synthesis of MXene for electrochemical hydrogen production.

MXenes (two-dimensional (2D) transition-metal carbides, nitrides, and carbonitrides) are gaining significant interest as alternative electrocatalysts for the hydrogen evolution reaction due to their excellent properties, such as high electrical conductivity, large surface area, and chemical stability. MXenes are traditionally synthesized using hydrofluoric acid (HF), which raises safety and environmental concerns due to its highly corrosive and toxic nature. HF introduces fluoride functional groups on the surface of MXenes, which have been reported to have a detrimental effect on electrocatalysis.

Unravelling the benefits of thermal waters enhancing oral health: a pilot study.

Background: Oral health represents a public health problem due to its remarkable social impact and medical costs. Crenotherapy with sulfur water is shown to be a complementary, less toxic, and traumatizing therapy, but the number of studies that evaluate the effect of natural mineral waters effect on oral health are scarce. The aim of this pilot study is to evaluate the impact of thermal water therapy on the oral health of the participants, assessing parameters such as plaque index, gingival bleeding index and periodontal probing depth as well on the perception of symptoms of oral mucosa diseases (OMD).

Multidimensional role of selenium nanoparticles to promote growth and resilience dynamics of against sodium fluoride stress.

High fluoride (F) concentrations negatively affect the seed germination, plant growth, development, and yield of crops. L. is an F-sensitive crop frequently grown on marginal lands affected by F salts.

Enriching fluorotelomer carboxylic acids-degrading consortia from sludges and soils.

Fluorotelomer carboxylic acids (FTCAs) has drawn increasing attention due to their prevalent occurrence, high toxicity, and bioaccumulating effects. In this study, microbial consortia with sustainable FTCA removal abilities were enriched and characterized from two activated sludges and five soils when no external carbon sources were supplemented. After four generations of enrichment, stable 6:2 FTCA and 5:3 FTCA biodegradation were achieved, reaching 0.

Health Implications of Proinflammatory Cytokine Activity at Different Levels of Fluoride Exposure: A Systematic Review.

The chronic intake of excessive fluoride (F) (>  1.5 mg/L) affects several tissues, organs, and systems. This represents a worldwide issue due to the presence of the compound in nature, with drinking water being the main source of exposure.

Esculin, a Coumarin Glucoside Prevents Fluoride-Induced Oxidative Stress and Cardiotoxicity in Zebrafish Larvae.

Fluoride (F) is a major groundwater contaminant spread across the world. In excess concentrations, F can be detrimental to living beings. F exposure is linked to cellular redox dyshomeostasis, leading to oxidative stress-mediated pathologies including heart dysfunction.

Curcumin mitigates sodium fluoride toxicity in Caenorhabditis elegans.

Fluoride, a naturally occurring element found in water, soil, food, and atmospheric precipitation, can lead to fluorosis and various health issues when consumed excessively. However, the mechanism of fluorosis is still under investigation. This study utilizes Caenorhabditis elegans as a model organism to investigate the effects of fluoride exposure on biological systems and to explore the mechanisms by which curcumin mitigates fluoride-induced toxicity.

Electro-activated peroxymonosulfate based on hollow cubic skeleton nanoflower cathode catalyst MoSe/cubic nanocage (CNC) for enhanced degradation of norfloxacin: Performance, mechanism, degradation pathways and toxicity.

Recently, antibiotic wastewater pollution has become increasingly serious. In this study, a novel hollow cubic framework self-supported nanoflower-like cathode catalyst (MoSe/CNC) based on Co Fe prussian blue analogues (CoFePBA)-derived cubic nanocage (CNC) loaded with MoSe was successfully prepared and utilized in an electro-activated peroxymonosulfate (PMS) system for norfloxacin (NOR) degradation. Benefit from the combined structures of MoSe, MoC, and Co/FeNC, the electrocatalytic activity and specific surface area were greatly improved.

A prescription for engineering PFAS biodegradation.

Per- and polyfluorinated chemicals (PFAS) are of rising concern due to environmental persistence and emerging evidence of health risks to humans. Environmental persistence is largely attributed to a failure of microbes to degrade PFAS. PFAS recalcitrance has been proposed to result from chemistry, specifically C-F bond strength, or biology, largely negative selection from fluoride toxicity.

Fluoride induces immune-inflammatory disorder in the kidneys via histone lysine crotonylation in vivo.

Fluoride is an essential trace element for human. Adequate levels of fluoride are crucial for maintaining skeletal growth, but excessive fluoride exposure entering the body can cause renal damage, including damaged renal tubules and impaired renal function. However, the mechanism on fluoride-induced kidney injury remains unclear.

Gut microbiota perturbation and subsequent oxidative stress in gut and kidney tissues of zebrafish after individual and combined exposure to inorganic arsenic and fluoride.

Chronic exposure to inorganic arsenic (iAs) and fluoride (F) affect gut health and potentially damage organs. The present study investigates the interplay between gut bacteria and oxidative stress (measured by MDA level, GSH level, catalase activity, Nrf2 translocation and expression) in zebrafish exposed to F (NaF 15 ppm) and As (AsO 50 ppb) alone or in combination. Combined exposure to As and F reduced gut bacterial alteration and imposed less oxidative stress compared to F- exposure alone.

The correlation between fluoride-induced bone damage and reduced DLAV formation in Zebrafish Larvae.

In this study, we aimed to investigate the mechanism by which fluoride exposure causes bone damage and the relationship with the loss of dorsal longitudinal anastomotic vessel (DLAV) formation in zebrafish larvae to further understanding of skeletal fluorosis. We assessed the development of chondrogenesis, osteogenesis, and DLAV angiogenesis, and reactive oxygen species (ROS) in zebrafish larvae subjected to blank control group (Con), low-fluoride group (LF), and high-fluoride group (HF). Abnormal development of the cartilage area, bone mineralization accompanied with abnormal mRNA expression of osteoblast-related OC, ALP, and Runx2b genes and osteoclast-related OPG and RANKL genes, and abnormal DLAV angiogenesis and ROS levels in zebrafish larvae were affected to varying degrees with the increase of fluoride exposure.

An in vivo and in silico probing of the protective potential of betaine against sodium fluoride-induced neurotoxicity.

Excessive fluoride exposure beyond the tolerable limit may adversely impacts brain functionality. Betaine (BET), a trimethyl glycine, possesses antioxidant, anti-inflammatory and anti-apoptotic functions, although the underlying mechanisms of the role of BET on fluoride-induced neurotoxicity remain unelucidated. To assess the mechanism involved in the neuro-restorative role of BET on behavioural, neurochemical, and histological changes, we employed a rat model of sodium fluoride (NaF) exposure.

Effect of fluoride-induced testicular alteration in rats fed a high-fat diet.

Previous research on the well-known environmental pollutant fluoride has demonstrated that fluoride exposure can lead to oxidative stress-related male infertility. Obesity is another public health issue that has a detrimental impact on male fertility. Previously, findings on fluoride toxicity in high-fat diet (HFD) conditions associated with oxidative stress have been evidenced.

AMPA and NMDA Receptors in Hippocampus of Rats with Fluoride-Induced Cognitive Decline.

This experimental study was performed to evaluate the alterations in the expression of a few subunits composing glutamate AMPA (a-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid) and NMDA (N-methyl-D-aspartate) receptors in the hippocampal cells of Wistar rats in response to long-term fluoride (F) exposure. The animals were given water with background 0.4 (control), 5, 20, and 50 ppm F (as NaF) for 12 months.

Fecal microbiota transplantation and short-chain fatty acids improve learning and memory in fluorosis mice by BDNF-PI3K/AKT pathway.

Fluoride, an environmental toxicant, not only arouses intestinal microbiota dysbiosis, but also causes neuronal apoptosis and a decline in learning and memory ability. The purpose of this study was to explore whether fecal microbiota transplantation (FMT) from healthy mice and bacteria-derived metabolites short-chain fatty acids (SCFAs) supplement protect against fluoride-induced learning and memory impairment. Results showed that FMT reversed the elevated percentage of working memory errors (WME) and reference memory errors (RME) in fluorosis mice during the eight-arm maze test.

Fluoride stimulates the MAPK pathway to regulate endoplasmic reticulum stress and heat shock proteins to induce duodenal toxicity in chickens.

Fluoride is one of the essential trace elements for body. However, excessive fluoride poses a major threat to human and animal health. Fluorosis may cause pathological damage of the duodenum, but the underlying mechanism needs to be further studied.