Supplemental instructional material on the placement of a rubber dam on a child patient. Two alterna...
Shows the armamentarium for, and the procedure of, placing a periodontal dressing in the upper left ...
Shows the trocars placement for Laparoscopic Nephrectomy in canine. ... laparoscopy laparoscopic tro...
Two different placement methods are shown. Orig. air date: FEB 25 82
Reasons for using rubber dams and the instruments and clamps necessary to place the rubber dam are p...
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Abstract: Many epoxy systems under consideration for composite pressure vessels are composed of toughened epoxy resins. In this work, epoxy blends containing both rigid aromatic and flexible aliphatic components were prepared, to model toughened systems, and determine the optimum route of silicate addition. Compositions were chosen such that both glassy and rubbery resins were obtained at room temperature. The physical properties of the nanocomposites varied with T(g) and silicate placement, however, nanocomposite T(g)s were observed which exceeded that of the base resin by greater than 10 C. The tensile strength of the glassy resin remained constant or decreased on the dispersion of clay while that of the rubbery material doubled. Selectively placing the clay in the aliphatic component of the rubbery blend resulted in a greater than 100% increase in material toughness.