Air particles3/21/2023 ![]() ![]() Studies in mice have shown some effects of breathing polluted air on the brain. Alternatively magnetite particles could enter the brain from polluted air and end up in amyloid plaques as a consequence of the brain’s waste disposal processes. However, the study did not provide evidence that magnetite is involved in the formation of amyloid plaques or that it can lead to the death of brain cells. The particles were seen inside protein deposits called amyloid plaques which are abundant in the Alzheimer’s brain, leading to speculation that magnetite could be involved in the development of Alzheimer’s disease. This study confirmed that fine particulate material can pass into the brain via the blood stream or directly through the thin lining of the nose. Using a special electron microscope, the researchers examined surface properties of the magnetite particles to prove that they had been generated at the high temperatures found in an engine rather than through natural processes. A study of brain tissue from people in Mexico City and Manchester conducted in 2016 confirmed that magnetite from air pollution can pass into the brain. Magnetite particles are released into the air by burning fuel, but they are also produced naturally in the brain. ![]() ![]() A form of iron called magnetite is often found within fine particulate matter and can be studied in body due to its magnetic properties. Most research has focused on a component of air pollution known as fine particulate matter or PM 2.5 - tiny particles that are 40 times smaller than the width of a human hair. Long term exposure or exposure to high levels of air pollution can be hazardous, leading to health conditions that affect the lungs and heart. Air pollution is made up of several different components including gases, chemical compounds, metals and tiny particles known as particulate matter. ![]()
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