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• W2023821945 endingPage "632" @default.
• W2023821945 startingPage "623" @default.
• W2023821945 abstract "Ambient air levels of fine particulate matter (PM ≤ 2.5 μm) are associated with mortality and morbidity. In addition to traffic, large quantities of fine and ultrafine particles (UFPs ≤ 100 nm) are emitted by residential wood combustion. Polycyclic aromatic hydrocarbon (PAH) and soot-rich emissions from small scale heating appliances have been linked with a plethora of toxicological effects. Recently, new technology appliances have been introduced into use although there are several uncertainties related to the toxicological properties of those emissions. In this study, PM1 (PM ≤ 1 μm) emissions from three different biomass combustion situations were compared. PM samples were produced in a novel adjustable biomass combustion reactor to avoid the problems encountered if one uses different appliances to generate the desired combustion conditions. The combustion conditions represented efficient, intermediate and smoldering situations. The concentration related effects of the particles (15, 50,150 and 300 μg ml−1) were investigated in a RAW264.7 macrophage cell line after 24 h' exposure. We analyzed cellular metabolic activity, cell cycle, and indicators of genotoxicty, oxidative stress and proinflammatory responses. Interestingly, the particles collected from smoldering and intermediate combustion conditions decreased cellular metabolic activity less than those from efficient combustion (10-fold difference). However, the samples from intermediate and smoldering combustion evoked greater DNA damage in the comet assay (2.5-fold difference). In contrast, only the particulate samples from efficient combustion triggered G2-cell cycle arrest and oxidative stress in the macrophages. These results indicate that ash rich PM emissions from appliances with almost complete combustion may still exert health impacts. However, particulate emissions from efficient combustion were small when compared to the two other situations. Thus, even with their faults and the obvious need for development, consumers should be encouraged to purchase efficient combustion devices in order to reduce exposure to PM induced adverse health effects." @default.
• W2023821945 created "2016-06-24" @default.
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• W2023821945 date "2014-06-01" @default.
• W2023821945 modified "2023-10-18" @default.
• W2023821945 title "Different toxic mechanisms are activated by emission PM depending on combustion efficiency" @default.
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• W2023821945 doi "https://doi.org/10.1016/j.atmosenv.2014.02.036" @default.
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