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eme1wk9 - sources also cause nanoparticles production like...

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Kenny Yu EME 1 12/1/08 Professor Ian Kennedy – Nanoparticles Today, Professor Ian Kennedy came to our class to discuss about nanoparticles. Some nanoparticles are good like toxins and pesticides but some could also be bad for inhaling. Most of these bad nanoparticles come from energy combustions. The impact of these bad nanoparticles in the air can increase non-accidental deaths in the United States by one to five percent annually. It is estimated to be around 36,000 excess deaths annually in the United States. From 1991-1998, people got rid off big harmful particles but made more nanoparticles when they designed the new engine. They got rid of the black smoke and soot but increased the amount of nanoparticles floating in the air. Not only do nanoparticles get produced from cars and big diesel trucks, they also come from domestic sources like charbroiling, wood burning, and using gas stoves. Stationary
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Unformatted text preview: sources also cause nanoparticles production like power plants and off road equipment (pumps, tractors, locomotives, etc.). Kennedy also explains to us the life cycle of a particle. First, it gets produced by emissions. Then it goes through atmospheric processing where it gets into the air that we breathe. Later, it gets inhaled by living things such as us and gets into the cells. When it gets into our lungs, macrophages in our lungs tries to eat away these bad particles and this process is called deposition. Whatever the macrophages cannot eat up, the particles goes to different parts of the body which is called translocation. Some of the nanoparticles enters our brain and into other organs in our body which may become lethal and dangerous to our health....
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