The presence of mono-valent ions except HCO3 − that is NO3 − and Cl− showed little effect on fluoride adsorption because of the formation of weak bonds with the active sites at the outer-sphere complex.
Referring to the kinetic parameters k2, k3, and k4, Wong and Piert state "The magnitude of k4 (the non-reversible, hence consistent with Patlak analysis, parameter) is typically small in comparison to k2 and k3, indicating little dissociation of fluoride from the bone matrix".
Similarly, leachates from non-antibacterial mineral samples (CJ08 and DT05) had little effect on the fluoride ion 19F NMR relaxation rate (Table S3), indicating that paramagnetic metal species in non-antibacterial mineral leachates were not accessible for chemical coordination.
For the fumigant sulfuryl fluoride, very little is known concerning the mechanism of toxicity.
Twice a day humans do battle, attacking it with bristles, abrasives, flossers, surfactants, antibacterials, fluoride and alcohol to little avail.
Nitrate, potassium and fluoride have very little contribution to the solute load, together account for <4 % of the TDS.
For participants in ARIC and HPFS studies, the majority had little exposure to sources of fluoride in their first 20 to 30 years of life.
Those with poor oral hygiene, bad dietary habits, salivary MS, little or no exposure to fluoride, and parents with a low educational level or an immigrant background were at 32 times greater risk than were children without the corresponding etiologic and external risk factors.
Large tracts of China have superficial fluoride-rich minerals with little, if any, likelihood of contamination by other neurotoxicants that would be associated with fluoride concentrations in drinking water.
