ABSTRACT: In the present study, Persian gum, an exudate gum which secrets from the mountain almond tree (Amygdalus scoparia Spach) from two different regions is evaluated by means of chemical and instrumental analysis (fractionated by solving in water and alkaline solutions at 0.1, 0.5 and 1 M and also Smith degradation) using HPLC, 1H–NMR and 13C–NMR spectroscopy’s. The total sugar and uronic ...

statement of problem: disinfection of dental impressions is a weak point in the dental hygiene chain. in addition, dental office personnel and dental technicians are endangered by cross-contamination. objectives : this study aimed to investigate the dimensional stability of two color-changing irreversible hydrocolloid materials (ih) after disinfection with glutaraldehyde. materials and methods ...