Part 1
Nanoparticles have been defined by the International Organization for Standardization (ISO) as objects with all dimensions in the nanoscale, which is approximately 1 to 100 nm. Nanoparticles are present in a variety of consumer products that we come into contact with every day. Some examples (taken from https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6192267/) include:
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Zinc oxide nanoparticles are used in sunscreens, food additives, pigments
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Titanium dioxide nanoparticles are extensively used as a pigment, a thickener, and a UV absorber in cosmetic and skincare products.
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Synthetic amorphous silica nanoparticles are used as a common food additive
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Silver nanoparticles are good antibacterial and antiviral agents and have been used to treat infections in bums, open wounds, chronic ulcers, trophic sores, eczema, and acne, and are also used as an antimicrobial agent in kinds of toothpaste, shampoos, air sanitizer sprays, detergents, and soaps
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Biodegradable polymer nanoparticles are the preferred carriers for targeted and controlled drug delivery systems
Think about some ways in which individuals who use one or more of the nanoparticle-containing products above may be exposed to those nanoparticles.
Once you have done so, please write a one page about the following information:
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Identify the source.
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In a few words, describe the pathway that the nanoparticles take from the source to human contact (example: nanoparticles from makeup are introduced into the air around the face of the person when they apply the makeup).
ME 424: Health, Safety and Environment Fall-2K23
Page 2 of 4
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List the relevant route(s) of exposure (example: aerosolized nanoparticles from makeup may be inhaled when the makeup is applied). WRITE A ASSIGNMENT ON THESE GUDELINES