Described is a "double mesh" technique for performing laparoscopic re-do repairs of inguinal hernias. When doing this procedure, it is virtually impossible to take down the peritoneum due to incorporation of the old mesh. This technique is therefore done by using a simple onlay of polypropylene mesh, covering the hernia defect and ensuring that sufficient staples are placed into the iliopubic t...

Bulk isotactic polypropylene in the a form was studied using density functional theory-based computations. The computed physical structure of this system is in excellent agreement with available experimental data. The electronic band structure, ionization potential, and electron affinity were also determined. The impact of various types of chemical imperfections (including double bond, hydroxyl...

Melt spinning of polypropylene fibers containing silver and zinc nanoparticles was investigated. The nanometals were generally uniformly dispersed in polypropylene, but aggregation of these materials was observed on fiber surface and in fiber cross-sections. The mechanical properties of the resulted composite fibers with low concentration of nanometal were comparable to those for the control P...

Attempts were made to modify polypropylene fibers by melt blending with polyethylene terephthalate in order to enhance the dyeability of the resultant fiber. Five blends of polypropylene/polyethylene terephthalate/compatibilizer were prepared and subsequently spun into fibers. Three disperse dyes were used to dye such modified fibers at boiling and 130 °C. The dyeing performance of the blend fi...

photooxidation as an important process, which significantly affects the service life of the polypropylene products, has been the subject of much theoretical and experimental study. pigments used often change the light stabilities of polypropylene. out-door applications of pigmented polypr-opylene are now increasingly developed in products such as artificial grass. the aim of this work is to exa...

Polypropylene/wood flour composites were melting compounded in an internal mixer at 190°C and 60 rpm rotor speed and then samples were fabricated by injection molding. Effects wood flour content on the physical properties of composites was investigated. For this purpose, hardness, water absorption and thickness swelling of samples was determined at different levels of wood flour content. The re...

the present work is aimed to find a new and efficient type of antioxidants for polypropylene. hence, effects of 3,3-bis(4-hydroxy-2-methyl-5-propan-2-ylphenyl)-2-benzofuran-1-one, generally known as thymolphthalein, on thermo-oxidative stability of polypropylene in solid and melt states were evaluated and compared with those of songnox 1010, an efficient commercially used antioxidant for the po...

Distinct enzyme activities were found in extracts from Stenotrophomonas maltophilia showing dye-linked oxidation of polypropylene glycols. The activities were induced when polypropylene glycols served as sole carbon and energy sources for the bacterium. In the logarithmic phase, most of the enzyme activities (88%) were found in the cytoplasm. In the stationary phase, more than half of the activ...

Some form of Ripstein sling procedure using teflon, marlex or mersilene to fix the rectum into the sacral hollow is a popular surgical option for the treatment of complete prolapse of the rectum. The Ripstein procedure with marlex mesh used in three patients confirms the technical simplicity, safety and effectiveness of the operation in controlling the prolapse. As it is with other current surg...