Polyethylene and polypropylene are the two polyolefins with wide ranging applications. They are recalcitrant and hence remain inert to degradation and deterioration leading to their accumulation in the environment, and, therefore creating serious environmental problems. In this review, biodegradation of these two polymers under in vitro conditions is reported. An attempt has been made to cover ...

Group 4 complexes containing an anilide(pyridine)phenoxide ligand and activated with methylaluminoxane (MAO) catalyze the formation of highly regioirregular polypropylene.

in this research, the decay resistance of bagasse-polypropylene composite has been evaluated. the scope of research was to assess the effect of different weight percentages of bagasse (40, 55 and 70%) and coupling agent, (mapp) maleic anhydride grafted polypropylene (0, 4 and 6%) on the fungal decay of the composite. astm d1413-99 modified test method was used to carry out the decay test, trame...

OBJECTIVES This study determined the difference in the location of the caries dye staining endpoint of 1% Acid Red dye in propylene glycol versus that of 1% Acid Red dye in polypropylene glycol. METHODS Freshly extracted permanent molar crowns with primary occlusal carious lesions were chisel-split axially to expose the lesion in cross-section on both halves. One half was stained with propyle...

The use of alloplastic-mesh is now a common practice in hernia repair around the world especially in the developed and industrialized countries [4].However in developing countries like Ghana, this methodology is either unknown by many local surgeons and general practitioners, or for fear of the unknown,it is not practiced. This study aimed to assess the appropriateness, outcomes and suitability...

PURPOSE To evaluate the medium-term efficacy and safety of transobturator four-arm polypropylene mesh in the treatment of high-stage anterior vaginal wall prolapse and concomitant stress urinary incontinence (SUI). MATERIALS AND METHODS Between September 2010 and August 2013, a prospective single-center trial was performed to evaluate women with stage≥3 anterior vaginal wall prolapse with or ...

Background: Most surgeons are reluctant to place synthetic mesh in contaminated abdominal wall repairs for fear of mesh infection. Biologic meshes are often used in this setting; however, these meshes lack the long-term durability of permanent, synthetic mesh. The authors present a single-center case series illustrating the safety and efficacy of the use of lightweight, large-pore polypropylene...

Magnetite nanoparticles (MNPs) show remarkable stability during extreme photothermal heating (≥770 K), displaying no change in size, crystallinity, or surfactants. The heat produced is also shown as chemically useful, driving the high-barrier thermal decomposition of polypropylene carbonate. This suggests MNPs are better photothermal agents (compared to gold nanoparticles), for photothermally d...

Microbacterium (formerly Corynebacterium) sp. No. 7 was isolated from activated sludge as a polypropylene glycol (PPG)-assimilating bacterial strain. Its oxidative PPG degradation has been proposed on the basis of PPG dehydrogenase activity and the metabolic products. Here, we report the complete genome sequence of Microbacterium sp. No. 7. The genome of the strain No. 7 is composed of a 4,599,...

Cementitious composites are one of the most consumed construction materials in the world. The use of cementitious composites is increasing due to their special characteristics. The behavior of high strength cementitious composites is improved by increasing the fiber percentage. In the present paper, the effects of steel microfibers and polypropylene fibers on mechanical properties and impact re...