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MSU Graduate Theses

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Nanomaterials

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The Effects Of Titanium Dioxide Nanoparticles On The Growth And Development Of Sorghum Bicolor (L.) Moenech, Adam Gregory Shoemaker May 2020

The Effects Of Titanium Dioxide Nanoparticles On The Growth And Development Of Sorghum Bicolor (L.) Moenech, Adam Gregory Shoemaker

MSU Graduate Theses

Engineered nanoparticles (ENPs) have seen a drastic increase in their use over the past decade in various consumer products. ENPs will therefore enter terrestrial ecosystems and soils with increasing frequencies, yet research into the effects of ENPs on living organisms and crops is greatly lacking. Currently, there is only one major study reported on the effects of a single ENP, silver quantum dots, on Sorghum bicolor, the 5th largest crop in the world. I examined the effects of a commonly used metal oxide nanoparticle, titanium dioxide (TiO2), on the growth and development of sorghum grown in …


Examination Of The Cytotoxicity Of Carboxyl Functionalized Single-Walled Carbon Nanotubes On Escherichia Coli, Brittany Linn Twibell Jul 2015

Examination Of The Cytotoxicity Of Carboxyl Functionalized Single-Walled Carbon Nanotubes On Escherichia Coli, Brittany Linn Twibell

MSU Graduate Theses

The growing use of carbon nanotubes (CNTs) in industrial and consumer products raises important questions about their environmental fate and impact on prokaryotes. In the environment, CNTs are exposed to a variety of conditions (e.g. UV light) that could lead to decomposition and changes in their chemical properties. Therefore, the potential cytotoxic effect of both pristine and artificially aged carboxyl functionalized single-walled CNTs at neutral and acidic conditions on Escherichia coli K12 was analyzed using a minimal inhibitory concentration (MIC) assay, which also allowed monitoring of non-lethal growth effects. However, there were no observable MIC or significant changes in growth …