Study of water diffusion in human dentin by optical coherent tomography

The diffusion of chemical agents in dental tissues is of interest for many problems of dental tissue physiology (diffusion of liquor and water), dental healing (diffusion of preparations), and cosmetic dental treatment (diffusion of whitening agents). The water diffusion in samples of human dentin was monitored using optical coherent tomography (OCT). This diffusion manifests itself as a change in the slope and amplitude of the OCT signal from the sample. It is shown that the average dentin permeability with respect to water is (15.11 ± 21.73) × 10⁻⁶ cm/s. These experimental results demonstrate the OCT efficiency for studying the diffusion in hard biological tissues.     

Pd-Catalyzed asymmetric allylation involving bis(diamidophosphite) based on the salen-type chiral diamine

Russian Chemical Bulletin - New bis(diamidophosphite) ligand with stereogenic phosphorus atoms in the 1,3,2-diaza-phospholidine rings was synthesized based on (1R,2R)-[N,...