Water-soluble sulfonated monomer based on 3,4-propylenedioxythiophene (ProDOT-sultone) was synthesized and characterized for the first time via the O-alkylation of the corresponding unreactive , -disubstituted hydroxyl group with propane sultone in the presence of a catalytic amount of 1,4-diazabicyclo[2.2.2]octane (DABCO). This new monomer was oxidatively polymerized to produce regioregular wa...

The aim of this in vitro study was to compare the long-term effect overnight use denture cleansers with different chemical compositions on color stability base polymers (DBPs). four DBPs evaluated were PEEK (PK group), thermoinjection-molded polyamide (PA auto-polymerized polymethylmethacrylate (PMMA) (AP and heat-polymerized resin PMMA (HP group). cleaning agents used Corega tablet (CT), Prote...

objectives: scaling and root planing (srp) is one of the most commonly used procedures during periodontal treatment. the aim of this study was to evaluate the root surface roughness after srp with erbium: yttrium aluminum garnet (er:yag) laser compared to ultrasonic and hand instruments.   materials and methods: in this experimental study, 56 extracted sound single-rooted teeth with moderate le...

background and objectives: bacillus species are attractive industrial organisms due to their rapid growth rates leading to a short fermentation cycle and for their capacity to secrete important enzymes and proteins such as xylanase into the extracellular medium. considering the industrial importance of xylanase, in this current study, bacillus spp. were isolated from different soils and were sc...

3.1 CHAPTER SUMMARY The solid state structure-property behavior was investigated of a series of poly(ether-blockamide) PEBAX thermoplastic elastomers based on nylon 12 and polytetramethylene oxide with varying hard segment content. Particular emphasis was placed on better defining the morphological features of this series of commercially available materials. Compression molded and solution cast...

The magnetization curves of magnetic fluid samples were measured using a vibrating sample magnetometer (VSM) and the differential run method. For standard fluids, VSM gives significantly underestimated values magnetization. In case solid based on epoxy resin, there is complete coincidence obtained by two measurement methods. last experiment was performed with styrene-based sample. It initially ...

Background: Traditionally for decades most oral maxillofacial prosthesis were fabricated using heat cured acrylic resin with or without Co-Cr metal base, however, recently polyamide materials that are processed thermally not chemically have been widely promoted for use as the perfect alternative to conventional hard acrylic dentures. The aim of this study was to assess the reaction of human mes...