Actin filaments are major determinants of cell shape, motility and adhesion, which control important biological processes including embryonic development and wound healing. These processes are associated with changes in actin assembly, which is regulated by controlling the balance between polymerized and non-polymerized actin. To maintain a significant pool of non-polymerized actin, mechanism(s...

Polymeric coatings such as polyurethanes, acrylic, epoxies and silicones have been used for over 40 years to protect printed wiring boards (PWB) from moisture, handling and environmental influences. Special semiconductor grade polymers have been developed for chip passivation layers. Polyimide became the standard passivation layer for memory chips and other devices needing surface protection fo...

In this work, we investigate the dynamics of ion motion in “doubly-polymerized” ionic liquids (DPILs) which both charged species an liquid are covalently linked to same polymer chains. Broadband dielectric spectroscopy is used characterize these materials over a broad frequency and temperature range, their behavior compared that conventional “singly-polymerized” (SPILs) only one attached Polyme...

A fundamental question in cell and developmental biology is how epithelial cells construct the diffusion barrier allowing them to separate different body compartments. Formation of tight junction (TJ) strands, which are crucial for this barrier, involves the polymerization of claudins, TJ adhesion molecules, in temporal and spatial manners. ZO-1 and ZO-2 are major PDZ-domain-containing TJ prote...

This study investigated the influence of ceramic thickness and curing unit on light transmission through leucite-reinforced material and polymerization of a dual-cured resin luting agent. Discs of Empress Esthetic (Ivoclar Vivadent) of 0.7-, 1.4- and 2-mm thickness were prepared. Variolink II (Ivoclar Vivadent) was placed in a 1-mm-thick cylindrical mold, and light-activated through ceramic for...

One of the earliest events in the process of cell motility is the massive generation of free actin barbed ends, which elongate to form filaments adjacent to the plasma membrane at the tip of the leading edge. Both cofilin and Arp2/3 complex have been proposed to contribute to barbed end formation during cell motility. Attempts to assess the functions of cofilin and Arp 2/3 complex in vivo indic...

OBJECTIVES The aim of this study was to investigate microhardness and compressive strength of composite resin (Tetric-Ceram, Ivoclar Vivadent), compomer (Compoglass, Ivoclar, Vivadent), and resin modified glass ionomer cement (Fuji II LC, GC Corp) polymerized using halogen light (Optilux 501, Demetron, Kerr) and LED (Bluephase C5, Ivoclar Vivadent) for different curing times. METHODS Samples ...

This Article contains an error in the Methods section under subheading 'Freeze substitution, resin embedding and sectioning'. " The first 12 h of polymerization were done at − 45 °C, during which the samples were covered with foil and indirectly exposed to UV light. The cover was then removed and samples were warmed to 0 °C at 5 °C/h and polymerized for a further 8 h, then left in the fumehood ...

Statement of problem: Fracture strength of a denture base resin is of great concern, and many approaches have been used to strengthen acrylic resin dentures. Purpose: The aim of this study was to measure the transverse strength of a heat polymerized acrylic resin, after reinforcement with metal wire and two types of glass fibers. Materials and Methods: Forty rectangular specimens (65.0×10.0×3.3...