Malignant ureteral obstruction can result in renal dysfunction or urosepsis and can limit the physician's ability to treat the underlying cancer. There are multiple methods to deal with ureteral obstruction including regular polymeric double J stents (DJS), tandem DJS, nephrostomy tubes, and then more specialized products such as solid metal stents (e.g., Resonance Stent, Cook Medical) and poly...

The main objective of this research is to improvethe design and performance of the polyurethane foam-filled thin-walled aluminum grooved circular tubes using multi-response optimization (MRO) technique. The tubes are shaped with the inner and the outer circular grooves at different positions along the axis. For this aim, several numerical simulations using ABAQUS finite element explicit code ar...

Honeycomb materials are widely used in aircraft structures. However, these structures have disadvantages longitudinal compression forces. While aluminum is generally as the face material sandwich composites structures, Nomex honeycomb or core material, depending on design. The reduced interface area between and surface layer also increases probability of separation under an applied load. In thi...

Hybrid halometalates containing lead, tin, bismuth and antimony organic cations have recently shown a bevy of interesting photophysical properties. Aiming at finding chemically stable thermally inert species, three halobismutate species this class, crystallized with proton sponge-derived (PRSH), been isolated as microcrystalline powders by mixing 1,8-bis(dimethylamino)-naphthalene (proton spong...

In this study, polycarbonate diol/isosorbide-based antibacterial polyurethane nanofiber fabrics containing Ag nanoparticles were prepared by electrospinning process. Bio-based highly elastic polyurethane was prepared from hexamethylene diisocyanate and isosorbide/polycarbonate diol (8/2) by a simple one-shot bulk polymerization. Ag nanoparticles were formed using simple thermal reduction of sil...

objective: to date, several scaffolds have been fabricated for application in bone tissue repair. however, there remains a need for synthesis of scaffolds with better mechanical properties, which can be applied to defects in weight-bearing bones. we constructed a composite ceramic bioscaffold of hydroxyapatite-alumina and silicon carbide (ha-al2o3- sic) to take advantage of the mechanical prope...

Introduction: Socket grafting offers a predictable, simple way to conserve the buccolingual and mesiodistal dimensions of the future implant site, and various bone-grafting materials using various techniques have shown promising results. Aim: This case presentation describes the use of an absorbable gelatin sponge in the socket preservation procedure. Materials and Methods: A 47-year-old male p...

We report a new inkless catalytic muCP technique that achieves accurate, fast, and complete pattern reproduction on SAMs of Boc- and TBS-protected thiols immobilized on gold using a polyurethane-acrylate stamp functionalized with covalently bound sulfonic acids. Pattern transfer is complete at room temperature just after one minute of contact and renders sub-200 nm size structures of chemically...