Nanofood Presentation
- 1. Engineered Nanomaterials in Food By Paloma Tracy and Mariah Poitier
- 3. Vocab ENM-Engineered Nanomaterials adsorption - Capability of a solid substance to attract to its surface molecules of a gas or solution agglomeration aggregation- a group or mass of distinct or varied things oxidation-reaction in which a material gives up electrons reduction reactions-the gaining of electrons. bioaccumulate-become concentrated in the bodies of living things
- 4. Engineered Nanomaterials (ENMs) 3 categories: inorganic surface functionalized materials organic Seen in Sunscreens, Cosmetics , Sports Equipment http://seas.yale.edu/faculty-research/research-areas/nanomaterials
- 5. What is Nanofood? contain engineered nanomaterials (ENMs) metal oxide nanoparticles man-made nanoparticles such as silver, titanium dioxide, zinc oxide, silica, etc. used in food supplements and food packaging http://www.earth911.com/content/uploads/2011/03/Chip-Bags.jpg
- 6. Inorganic Nanomaterials found in food additives and food packaging/ storage ENMs of... transition metals (silver, iron, titanium, and zinc) alkaline earth metals (calcium and magnesium) non-metals (selenium and silicates) s1.ibtimes.com (source)
- 7. Properties of ENMs NanoSilver Anti Microbial, Anti Odor, Supplements NanoTitaniniuum Block UV rays, Prevents microbial growth Nano Zinc Absorbs UV w/o emitting heat NanoSilica Caking Agent
- 8. Applications NanoSilver textiles , cosmetic/ hygiene, appliances , cleaning agents NanoTitianum paints, plastics, colorants Nano Zinc Polymer composites , multivitamin NanoSilica s3-production.bobvila.com
- 10. Benefits of Nanofood improved taste, texture, and consistency preservation (shelf life extension) → enable the foods to be transported further 150-600 nanofoods and 400-500 nano food packaging applications are on the market www-tc.pbs.org
- 12. Risk Assessment food contamination may come from nano pesticides contact of food with nanoparticulate-based coatings during preparation or processing migration of ENMs from food packaging surface coatings can make non harmful particles highly toxic lack of data animal testing shows potential harm for humans possible correlation between ENMs and chronic disorders and autoimmune diseases
- 13. Risk Assessment - Humans expose humans to man-made nanoparticles alter body metabolism Ag - “damage cells derived from human and mammalian skin, liver, lung, brain, vascular, and reproductive tissues” TiO2 - absorbed through the lung or GIT into systemic circulation and then distributed in the liver, kidneys, spleen, and brain health complications size allows ENMs to enter the food chain and bloodstream undetected and accumulate within tissues and organs low solubility allows ENMs to cross the “gastrointestinal tract as an intact particle” harm the GIT by interacting with surfaces or inhabitants of the lumen (microbiota) induce oxidative stress, release toxic ions, disrupt electron/ion cell membrane transport activity and cause oxidative damage and lipid peroxidation
- 14. Risk Assessment - Environment ENMs may “undergo diverse physical, chemical, and biological transformations” such as deposition, adsorption, agglomeration, aggregation, and oxidation/reduction reactions environmental factors (pH, salinity, microbes, natural organic material) may affect the reactivity, mobility, and toxicity of ENMs ENMs may bioaccumulate () in the food chain
- 15. Conclusion increased use of ENMs in consumer products will increase concern about potential human toxicity and environmental impact “urgent need to gather information on this subject” to determine: will the potential dangers outweigh the benefits?
- 16. References 1. http://www.earth911.com/content/uploads/2011/03/Chip-Bags.jpg 2. Martirosyan, Alina, and Yves-Jacques Schneider. "Engineered Nanomaterials in Food: Implication for Food Safety and Consumer Health." International Journal of Environmental Research and Public Health. 28 May 2014. Web.