Fluoride concentrations in 42 urinary calculi were determined using a microdiffusion procedure in conjunction with a fluoride sensitive electrode. Mean values of 56, 230 and 1112 ng./mg. fluoride were obtained for uric acid, calcium oxalate monohydrate and apatite/struvite stones, respectively. Fluoride concentration was found to be related to calcium oxalate dihydrate levels as well as to apatite content. It is suggested that the former has zeolithic properties which might trap fluoride while formation and growth of the latter appears to be enhanced by elevated urinary fluoride levels.
Fluoride Balances In Pregnant And Nonpregnant Women.
In planning health protection for pregnant as well as nonpregnant women exposed to fluorides, information about their fluoride metabolism is essential. The authors determined fluoride balances in small groups of young women maintained on two different low-fluoride diets for one or two 21-day periods in a metabolic unit. One diet
Urinary fluoride excretion in Jamaica in relation to fluoridated salt.
The purpose of this study was to compare the urinary fluoride levels in subtropical Jamaica just before the beginning of salt fluoridation (250 mg/kg salt) in 1987 and again 20 months later. Four age groups were studied in three locations with low to intermediate fluoride concentrations in the drinking water.
Urinary fluoride excretion in fluoride exposed workers with diminished renal function.
The usefulness of measuring fluoride (16984488) in serum and urine as an index of hydrofluoric-acid (144490) (HFA) exposure in workers with chronic renal function failure (CRF) was investigated. The first group consisted of 40 patients with CRF and serum creatinine and blood urea nitrogen values greater than 5 and 50
Low-to-moderate fluoride exposure in relation to overweight and obesity among school-age children in China.
Highlights A large-scale study on school-age children's health in a Chinese fluorosis area. Low-to-moderate fluoride and children's anthropometric measurements were assessed. Fluoride exposure is related to increased BMI z-score and prevalence of overweight. The significant associations were differed by gender and mainly observed in girls. Associations were stronger among children
Prevention of bony fluorosis in aluminum smelter workers. A five-year study of fluoride absorption and excretion -- Pt. 3.
1. A study of over 52,000 urinary fluoride determinations collected over a 5-year period among aluminum smelter workers is described. The pre-shift urinary fluoride concentration (representative of bony burden) appears to increase less rapidly than the post-shift concentration. This slow rate of bony buildup of pre-shift urinary fluoride concentrations reflects
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