objective: comparing the effect of repeated opening of the container lid of two dentin adhesive systems, prime&bond; nt (p&b; nt) and ibond (ib), on shear bond strength. materials and methods: intact bovine lower incisors (n=60), fixed in acrylic were ran-domly divided into six groups (n=10). groups i and ii were set as control groups. p&b; nt and ib were applied on the samples after five days ...

Students are often unsure of how to select the right study path at a higher educational institution. They either lack knowledge proposed or they do not manage learn more before making their selection. Universities apply various approaches, such as printed online course curricula, facilitate selection process. Yet these approaches inefficient because attract students' attention, provide ambiguou...

statement of problem: ceramics as in ceramo-metallic and all ceramic tooth restorations have grown popular owing to their high tissue compatibility and esthetic advantages. such restorations have the capability to deliver valuable services over a long period of time; however, failures under intraoral conditions are not unanticipated. purpose: the purpose of this in-vitro study was to investigat...

hydrogen bonding of dppe with water that surrounded of membrane, plays an important role in permeability ofmembrane that we were presented this matter with analysis of bond angles and torsion angles before and after ofadded water molecules.interaction with water molecules causes some changes in the geometry of dppe which were explained bythe contribution of zwitterionic form of dppe molecule, a...

The sample population was consisted of 299 male and female students of the University of Khwarizmi. Theories used in this study included Social bonding theory, differential opportunity, differential association, feeling anomie and frustration (love, and academic failure). The obtained results indicate that there is the bound variables, anomie, differential association, feeling of anomie, social...