- Biomonitoring can be a cost effective approach for airborne fluoride monitoring.
- Internal fluorides decreased exponentially with distance from the source.
- Distance and exposure time significantly influenced fluoride accumulation.
- Plant age had no significant impact on fluoride accumulation.
Airborne fluoride emission is an environmental concern. There is a lack of knowledge in determining factors influencing internal fluoride accumulation in plant tissue. The aim of this study was to improve understanding of how temporal, spatial and physiological factors influence internal fluoride accumulation. Lolium perenne L. (perennial rye grass) was used as a bioindicator and exposed in 52 sites in 2015 and 11 sites in 2016 surrounding the emission source. Biomass was harvested for fluoride analysis. A biomonitoring system was developed to standardize greenhouse cultivation, field exposure, and plant harvest. Results show that relatively cooler weather may promote internal fluoride accumulation of perennial rye grass over time. Distance from the source and exposure time significantly influenced internal fluoride accumulation. Internal fluoride concentrations decreased exponentially with distance from the source, with a sharp drop within 500?m. Generally, fluoride accumulation increased with days of exposure. It peaked after 81?days of exposure in 2015 and 110?days in 2016. Plant age had no significant impact on fluoride accumulation. Biomonitoring can be a cost effective approach for detecting long term environmental impacts of airborne pollution. The method in this research can be applied in various point source air pollution scenarios to assess emission impacts on biota and to aid in land use management.
*Original abstract online at https://www.sciencedirect.com/science/article/abs/pii/S0048969721075951
Long-term follow up of ionic plasma fluoride level in patients receiving hemodialysis treatment
The elimination half-life of fluoride is significantly increased in patients with chronic renal failure. This led us to conduct a study of variations of its plasma levels in 35 patients receiving dialysis treatment. In this population, there is a gaussian distribution of the values before and after the hemodialysis session,
The distribution of fluoride of prenatal origin in the rat--a pilot study.
Sixteen female, Sprague-Dawley rats were divided into four equal groups. Two groups served as controls receiving low or regular concentrations of fluoride (F); animals in the other two groups were given drinking water, containing 100 parts/10(6) F, for 3 weeks either during or immediately before pregnancy. Thirteen days after delivery,
Assessing fluoride concentrations of juices and juice-flavored drinks.
Few studies have investigated fluoride exposures from juices and juice-flavored drinks manufactured with water. In this study, the authors analyzed 532 juices and juice drinks for fluoride. Fluoride ion concentrations ranged from 0.02 to 2.80 parts per million, in part because of variations in fluoride concentrations of water used in production. Children's ingestion of fluoride from juices and juice-flavored
No evidence that fluoride supplements taken during pregnancy prevent caries.
Data sources: Cochrane Oral Healths Trials Register, the Cochrane Central Register of Controlled Trials (CENTRAL) Medline, Embase, LILACS BIREME Virtual Health Library CINAHL US National Institutes of Health Ongoing Trials Register (ClinicalTrials.gov) and the World Health Organization International Clinical Trials Registry Platform databases. Study selection: Randomised controlled trials (RCTs) including quasi-randomised
Exposure Assessment of Fluoride Intake Through Commercially Available Black Tea (Camellia sinensis L.) from Areas with High Incidences of Chronic Kidney Disease with Undetermined Origin (CKDu) in Sri Lanka.
Fluoride is a beneficial trace element for human health as its deficiency and excess levels can cause detrimental health effects. In Sri Lanka, dry zone regions can have excessive levels of fluoride in drinking water and can cause dental and skeletal fluorosis. In addition to drinking water, traditional habits of
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