BACKGROUND Aseptic loosening of total hip arthroplasties is generally caused by periprosthetic bone resorption due to tissue reactions on polyethylene wear particles. In vitro testing of polyethylene cups incorporated with vitamin E shows increased wear resistance. The objective of this study is to compare vitamin E-stabilized highly cross-linked polyethylene with conventional cross-linked poly...

In medicine and food industry, bacterial colonisation on surfaces is a common cause of infections and severe illnesses. However, the detailed quantitative information about the dynamics and the mechanisms involved in bacterial proliferation on solid substrates is still lacking. In this study we investigated the adhesion and detachment, the individual growth and colonisation, and the cell size c...

OBJECTIVE To determine the safety and efficacy of using porous high-density polyethylene (PHDPE) in the repair of orbital defects. DESIGN Retrospective case series. SETTING Academic tertiary care trauma center. Patients One hundred seventy patients with orbital defects requiring surgical repair. Intervention Orbital defect repair with PHDPE. Main Outcome Measure Our review documents surgica...

The Young modulus for crystalline polyethylene is calculated using ab initio molecular dynamics based on density functional theory in the local density approximation (DFT-LDA). This modulus, which can be seen as the ultimate value for the Young modulus of polyethylene fibers, is found to be 334 GPa. For the first time the modulus is evaluated ab initio (no bias from experimental data) with demo...

Gaseous acetylation of microcrystalline cellulose (MCC) was carried out to modify its chemical and physical properties and at the same time to preserve the morphology of cellulose microfibrils. Spectroscopic analysis of the samples was indicative of the success of the reaction as indicated by FT-IR and H-nmr studies. The chemically modified microcrystalline cellulose (MCC) were blended with hig...

Continuous optimization of business process execution including its adaptation to changes within the market environment or the company itself becomes increasingly important. Therefore, business performance related decision support needs to be an integral part of Business Process Management (BPM) Environments. We experienced that such a support is especially useful when dealing with complex and ...

The effect of titanium dioxide as a semiconductive additive and barium titanate as a highly polar additive on the d.c. transient currents in low density polyethylene is investigated. Experiments were made using thick specimens under high electric field ( > 25 x 106 V/m) and constant temperature of 40OC. Results indicate that the incorporation of the foresaid additives has a remarkable effect on...