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Surface area of particle administered versus mass in determining the pulmonary toxicity of ultrafine and fine carbon black: comparison to ultrafine titanium dioxide

机译:确定超细和细粉炭黑的肺毒性时所用颗粒表面积与质量的比值:与超细二氧化钛的比较

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摘要

BackgroundNanoparticles are characterized by having a high surface area per mass. Particulate surface area has been reported to play an important role in determining the biological activity of nanoparticles. However, recent reports have questioned this relationship. This study was conducted to determine whether mass of particles or surface area of particles is the more appropriate dose metric for pulmonary toxicity studies. In this study, rats were exposed by intratracheal instillation to various doses of ultrafine and fine carbon black. At 1, 7, or 42 days post-exposure, inflammatory and cytotoxic potential of each particle type was compared on both a mass dosage (mg/rat) as well as an equal surface area dosage (cm2 of particles per cm2 of alveolar epithelium). In an additional study, the pulmonary responses to instillation of ultrafine carbon black were compared to equivalent particle surface area doses of ultrafine titanium dioxide.
机译:背景技术纳米粒子的特征在于每质量具有高表面积。据报道,颗粒表面积在确定纳米颗粒的生物活性中起重要作用。但是,最近的报道质疑这种关系。进行这项研究是为了确定颗粒的质量或颗粒的表面积对于肺毒性研究是否更合适。在这项研究中,通过气管内滴注将大鼠暴露于各种剂量的超细和细碳黑中。在暴露后1、7或42天,比较每种颗粒类型的炎症和细胞毒性潜力的质量剂量(mg /大鼠)和相等的表面积剂量(cm 2 每cm 2 肺泡上皮的颗粒数)。在另一项研究中,将对超细炭黑滴入的肺部反应与超细二氧化钛的等效颗粒表面积剂量进行了比较。

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