What Manufacturers Really Mean By Natural And Artificial Flavors Like many shoppers, I find food labels confusing. In most circumstances, the implications of âartificialâ and naturalâ are pretty clear.
Hydroxylapatite, also called hydroxyapatite (HA), is a naturally occurring mineral form of calcium apatite with the formula Ca 5 (PO 4) 3 (OH), but is usually written Ca 10 (PO 4) 6 (OH) 2 to denote that the crystal unit cell comprises two entities. Hydroxylapatite is the hydroxyl endmember of the complex apatite group.
The tooth mineral hydroxyapatite de-composes and calcium fluoride adheres tothe apatite and can serve as a source of flu-oride for subsequent conversion of hydroxy-apatite to fluorapatite.6Recently there has been interest in theapplication of physical chemistry principles to hydroxyapatite, the primary mineral of teeth.ith the aid of a computer, it ispossible to calculate initial rates of reactionthat can be used to evaluate a priori thefluoride uptake potential of various fluoridesolutions. The variables that can be exam-ined are the fluoride concentration, phos-phate concentration, pH, buffer type (pKa), and buffer concentration.