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首页> 外文期刊>International journal of biomedical nanoscience and nanotechnology >Characterisation of nanoparticles resulting from different braking behaviours
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Characterisation of nanoparticles resulting from different braking behaviours

机译：表征不同制动行为的纳米颗粒

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摘要

Brake wear particulate matter (PM) may provoke cardiovascular effects. A system was developed to expose cells to airborne PM from brakes. Six car models were tested, each with full stop and normal deceleration. PM numbers, mass and surface, metals, and carbon compounds were measured. Full stop produced higher PM number and mass concentrations than normal deceleration (up to 10 million particles/cm3 in 0.2 m3 volume). 87% of the PM mass was in the fine (100 ran to 2.5 mum) and 12% in the coarse (2.5 to 10 murn) fraction, whereas 74% of the PM number was nanoscaled (ultrafine < 0.1 mum) and 26% fine PM. Elemental concentrations were 2,364, 236, and 18 mug/m3 of iron, copper and manganese, respectively, and 664 and 36 mug/m of organic and elemental carbon. PM-release-differed between cars and braking behaviour. Temperature and humidity were stable. In conclusion, the established system seems feasible for exposing cell cultures to brake wear PM.
机译：制动器磨损的颗粒物（PM）可能引起心血管疾病。开发了一种系统，以使制动单元将细胞暴露于空气中的PM。测试了六个汽车模型，每个模型均具有完全停止和正常减速的能力。测量了PM数量，质量和表面，金属和碳化合物。完全停止产生的PM数量和质量浓度高于正常减速（在0.2 m3的体积中高达1000万个颗粒/ cm3）。 87％的PM质量在细颗粒中（100到2.5微米），12％在粗颗粒（2.5至10微米）中，而74％的PM量是纳米级的（超细<0.1 mum），26％细下午。铁，铜和锰的元素浓度分别为2,364、236和18大杯/立方米，有机碳和元素碳的元素浓度分别为664和36大杯/立方米。 PM释放在汽车和制动性能之间有所不同。温度和湿度稳定。总之，建立的系统对于将细胞培养物暴露于制动磨损PM看来是可行的。

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