相关实验视频
Updated: Sep 23, 2026

10:11
Whole-Body Nanoparticle Aerosol Inhalation Exposures
Published on: May 7, 2013
15.9K
在野火季节,细颗粒物透到蒙大拿州西部的住宅中
Ethan S Walker1, Taylor Stewart1, Dave Jones1
1Center for Population Health Research, University of Montana, Missoula, MT, USA.
The Science of the total environment
|July 1, 2023
概括
野火烟雾显著增加室内细颗粒物 (PM2.5). 室内PM2.5水平和透率在家庭之间差异很大,这表明需要有针对性的干预措施.
科学领域:
- 环境健康 环境健康
- 空气质量科学 空气质量科学
- 公共卫生 公共卫生
背景情况:
- 由于野火频率和强度的增加,野火空气污染对公共卫生构成越来越大的风险.
- 建议减少室内暴露于野火烟雾,但关于室内透率和影响因素的数据有限.
研究的目的:
- 在野火季节评估细颗粒物 (PM2.5) 透到蒙大拿州西部的住宅.
- 为了确定与更高的室内PM2.5透率相关的家庭和行为特征.
主要方法:
- 从2022年7月到10月,在20个住宅中使用低成本传感器测量了室外和室内PM2.5的持续度.
- 透效率 (Finf) 用对外/室内PM2.5数据进行计算.
- 分析包括家庭数据组合和子组比较.
主要成果:
- 在野火期间,室内每天PM2.5的中位数为10.4μg/m3,而整体为2.5μg/m3.
- 整体透效率 (Finf) 为0.34,野火期间的值较低 (0.32),而非野火期间的值较低 (0.39).
- 室内PM2.5和FINF根据家庭的收入,家庭年龄,空调使用和空气清洁器的存在,在不同家庭之间有很大的差异.
结论:
- 在野火期间,室内PM2.5度大幅增加.
- 在家庭中观察到室内PM2.5和透效率的显著变化.
- 研究结果表明,可修改的家庭特征和行为可以为针对野火烟雾暴露的针对性公共卫生干预提供信息.
相关概念视频
Washing, Drying, and Ignition of Precipitates
After filtration, the precipitate is washed to remove coprecipitated impurities and any remaining mother liquor. Colloidal precipitates, such as silver chloride, are washed with an electrolyte (such as dilute nitric acid) to prevent the peptization of the precipitate. In the case of slightly soluble precipitates, the wash solution contains a common ion to reduce solubility. Lead sulfate, which is slightly soluble in water, is washed with dilute sulfuric acid. Similarly, wash solutions may be...
Pulmonary Ventilation: Inhalation
Pulmonary ventilation is a vital process that ensures the exchange of oxygen and carbon dioxide in the lungs. It refers to the movement of air into and out of the lungs, enabling the body to obtain oxygen and remove waste carbon dioxide. In this article, we will explore the intricacies of pulmonary ventilation, including its underlying principles, mechanisms, and the interplay of pressures within the respiratory system.
Boyle's law becomes particularly pertinent when examining respiratory...
Boyle's law becomes particularly pertinent when examining respiratory...
Factors Affecting Pulmonary Ventilation
Besides the pressure difference between the external environment and the lungs, the airflow rate and ease of pulmonary ventilation are also influenced by three other factors: surface tension of the fluid in the alveoli, compliance of the lungs, and airway resistance.
Alveolar Surface Tension
The alveolar fluid lines the luminal surface of the alveoli and exerts a force called surface tension. This force is caused by the polar water molecules in the liquid being more strongly attracted to each...
Alveolar Surface Tension
The alveolar fluid lines the luminal surface of the alveoli and exerts a force called surface tension. This force is caused by the polar water molecules in the liquid being more strongly attracted to each...
Inhalation Anthrax
Anthrax is a zoonotic disease caused by Bacillus anthracis, a Gram-positive, spore-forming bacterium. It primarily affects herbivorous animals but can be transmitted to humans through skin contact, ingestion, or inhalation of spores.Cutaneous anthrax, the most common form, typically results from direct contact with bacterial spores through skin abrasions and is generally less severe. Gastrointestinal anthrax results from eating undercooked or contaminated meat. It affects the mouth, throat, or...

