T-cells, second only to macrophages, are often considered as the potential cells involved in debris-related failure of arthroplasty. Here, we assessed the effects of particulate wear debris on T-cells and inflammatory reactions. Blood samples from 25 donors were incubated with polyether-ether-ketone (PEEK) and cobalt-chromium-molybdenum (CoCrMo) particles generated by custom cryo-milling and pu...

BACKGROUND Polyetheretherketone (PEEK) and its composites are polymers resistant to fatigue strain, radiologically transparent, and have mechanical properties suitable for a range of orthopaedic applications. In bulk form, PEEK composites are generally accepted as biocompatible. In particulate form, however, the biologic response relevant to joint replacement devices remains unclear. The biolog...

In regions where studded tyres and traction material are used during winter, e.g. the Nordic countries, northern part of USA, Canada, and Japan, mechanically generated particles from traffic are the main reason for high particle mass concentrations in busy street and road environments. In many Nordic municipalities the European environmental quality standard for inhalable particles (PM(10)) is ...

The article presents the results of research a railway disc brake in evaluation weight wear friction pads. tests were carried out on certified stand where and mechanical characteristics are determined. was additionally equipped with thermal imaging camera to observe contact pads disc. Attention also paid examining influence such parameters braking process as surface pad disc, thickness determin...

Abstract A brake is the most critical safety and important performance component in vehicles. Brake pads were formerly manufactured mainly using asbestos as friction material (30-70%). Thermally stable temperature for up to 500°C. Asbestos strong, flexible & available at a reasonable cost but carcinogenic nature. This causes serious health problems like lung cancer hence it got banned India...

Problem This scientific article is devoted to the value of static and dynamic coefficients friction disc-pad brakes. The issue brake wear very acute because safety using machine itself depends on its reliable operation. Therefore, relevance chosen topic cannot be doubted. Goal. aim establish patters influence main operational parameters pairs a model potential kinematic coefficient friction. Me...

Vertical Coal Mill (VCM) is equipment for grinding and pulverizing coal into micron size. Rotary kilns then use the powders as fuel burners. The VCM has a housing section equipped with lining plate wear tear protector. comprises segments similar thicknesses materials that are severe to due gas-carrying solid particles hitting surface. specific material resilient abrasion required extend operati...

COPERT is a globally used software tool used to calculate air pollutant and greenhouse gas emissions produced by road transport, and its scientific development is managed by the European Commission. The software estimates all types of emissions including hot running, start, evaporative and non-exhaust (tire wear, brake wear). Previous studies showed that a similar software used in Australia nee...