PURPOSE We report the preliminary results of endoscopic treatment of vesicoureteral reflux in children using polyacrylate polyalcohol copolymer. MATERIAL AND METHODS We performed a prospective multicenter review of pediatric patients treated with subureteral injection of a new nonabsorbable substance. Only patients with 1 year of followup were included. RESULTS A total of 83 patients underw...

Two series of polyacrylate films with different H-bonding capable monoacrylate copolymers were synthesized by UV-initiated photo-polymerization.

We report a simple photolithographic approach for the creation and micropatterning of chemical functionality on polymer surfaces by use of surface-active block copolymers that contain protected photoactive functional groups. The block copolymers self-assemble at the substrate-air interface to generate a surface that is initially hydrophobic with low surface tension but that can be rendered hydr...

The phase separation between polydiacetylene and a polyacrylate is studied at the local scale with correlative spectroscopic microscopy techniques, revealing new properties of confined polydiacetylene.

The use of transverse electric (TE) polarization has dominated illumination schemes as selective polarization is used for high-NA patterning. The benefits of TE polarization are clear – the interference of diffracted beams remains absolute at oblique angles. Transverse magnetic (TM) polarization is usually considered less desirable as imaging modulation from interference at large angle falls of...

This study investigated compressive strength, chloride penetration, and freeze-thaw resistance of multiwalled carbon nanotube (MWNT) concrete. More than 100 cylindrical specimens were used to assess test variables during sensitivity observations, including water-cement ratios (0.75, 0.5, and 0.4) and exposure to chemical agents (including gum arabic, propanol, ethanol, sodium polyacrylate, meth...

Macromol. Biosci. 2002, 2, 207 –213 Full Paper: Calcium ions are introduced to sodium polyacrylate gels swollen in sodium chloride solutions and the volume transition is measured by osmotic and small-angle neutron-scattering. The osmotic pressure is found to depend on the sodium chloride con­ centration, indicating that calcium preferen­ tially replaces condensed sodium ions, a result supported...

The stability of polyacrylate and polyester based aqueous dispersions designed for ultrathin coating of extruded plastic films, especially bi-axially oriented polyethylene terephthalate (BOPET), was studied. Also, the effect of the gemini surfactant based defoaming/wetting agent on the properties of the dispersions was examined. The addition of the defoaming/wetting agent resulted in reducing t...

Palygorskite (Pal) is a natural clay mineral with fibrous morphology and high surface area. Depending on the geological origin, it presents impurities, such as quartz carbonates, which can harm some of its properties. Therefore, this work seeks to define viable methodology for purification Brazilian Pal. Two types mixing processes (sonication milling) two dispersing agents (sodium silicate sodi...