title: Affinity of hydroxyapatite for furfural and a brown pigment formed by furfural and glycine.
abstract: The affinity of hydroxyapatite for furfural and a brown pigment formed by furfural and glycine was studied. A series of mixtures containing 1 M furfural and 0.25-2.0 M glycine were incubated at 37 degrees C and aliquots of hydroxyapatite added. The apatite showed a strong affinity for the brown pigment formed, and an excess of glycine in the mixtures appeared to enhance the binding. The adsorption of furfural to hydroxyapatite was estimated by a spectrophotometric method. The data revealed that pretreatment with CaCl2 and glycine significantly increased the adsorption of furfural.
mesh_terms: D000327:Adsorption; D005662:Furaldehyde; D005998:Glycine; D006882:Hydroxyapatites; D008239:Lysine; D010860:Pigments, Biological; D014075:Tooth Discoloration / Q000139:chemically induced*
chemical_list: D006882:Hydroxyapatites; D010860:Pigments, Biological; D005662:Furaldehyde; D008239:Lysine; D005998:Glycine