No abstract

Constant shear rate rheokinetics was used to evaluate the polymerization of four norbornene-based monomer systems as candidate healing agents in self-healing composites: endo-dicyclopentadiene (endo-DCPD), exo-DCPD, 5-ethylidene-2-norbornene (ENB), and a 1:1 volume mixture of endo-DCPD:ENB. The ruthenium catalyst induced ring-opening metathesis polymerization of the healing agent candidates were measured experimentally under isothermal conditions while the influences of several different variables were considered (e.g., test temperature, catalyst concentration, catalyst form). Analyzing the increase in viscosity during the polymerization, comparisons of the reaction kinetics of the different monomers were quantified by defining two parameters, t t and ⌬t, which correspond to the polymerization initiation and propagation rates respectively. Generally, ENB shows the fastest polymerization kinetics, and endo-DCPD the slowest.

No abstract

TA slightly inhibits LDC but strongly reduces biofilm by inhibiting bacterial lysine uptake. Unfortunately, TA may impair dental epithelial attachments by also inhibiting lysine transporter uptake. Ecor-LDC inhibitors other than lysine analogs may maintain sufficient lysine levels and attachment integrity to prevent periodontal inflammation.

No abstract