Index Catalog // ScholarsArchive@OSU

An in silico Approach to Determine the Influence of Surface Chemical Properties on the Toxicity of Engineered Zinc Oxide Nanoparticles

Creator:: Zhou, Zitao
Abstract:: Nanotechnology products have long since made their way to markets around the world increasing the concerns about whether nanomaterials pose a risk to our environment or health. It has been suggested that engineered nanomaterial (ENM) with broad applications and rapid commercialization need better risk assessment and regulation. However, the refinement...
Resource Type:: Masters Thesis
Full Text:: Toxicity of Engineered Zinc Oxide Nanoparticles. Abstract approved: Stacey L. Harper Nanotechnology

Assessing the Impacts of Size, Structure, and Surface Chemistry on the Toxicity of Two High Production Organic Nanomaterials using the Embryonic Zebrafish Model

Creator:: Meredith, Ailcea N.
Abstract:: The low risk and sustainable implementation of nanotechnology requires understanding how nanomaterial physicochemical properties influence their toxicity. Major drivers of toxicity need to be avoided while maximizing product efficacy so nanomaterials can be produced to best serve their applications and be of low risk when intentionally or unintentionally released into...
Resource Type:: Masters Thesis
Full Text:: Abstract approved: ______________________________________________________ Stacey L. Harper The

A Review and Toxicological Evaluation of an Environmentally-Friendly Alternative to Silver Nanoparticles

Creator:: Nix, Cassandra E.
Abstract:: Within the past two decades, the rise of nanotechnology has provided various technological and industrial sectors with avenues for significant growth and improvements to existing practices. With the inherent qualities which make materials on the nanoscale unique in behavior and function, there are limitless applications of nanotechnology. One of the...
Resource Type:: Masters Thesis
Full Text:: Stacey L. Harper Within the past two decades, the rise of nanotechnology has provided various

Novel Approaches to Evaluate the Environmental Impacts of Nanomaterials

Creator:: Wu, Fan
Abstract:: Numerous studies have shown that some nanomaterials are highly toxic to aquatic organisms and can potentially disrupt overall community health; however, current methods to evaluate the nanomaterials environmental impacts rarely consider the environmental realism or provide sufficient detail on the impact at the community level. Here we demonstrate three approaches...
Resource Type:: Dissertation
Full Text:: Abstract approved: ____________________________________________ Stacey L. Harper Numerous

Size and surface area dependent toxicity of silver nanoparticles in zebrafish embryos (Danio rerio)

Creator:: Tuttle, George R.
Abstract:: Many studies addressing the toxicity of silver nanomaterials have found that smaller sized silver nanoparticles are usually more toxic to organisms and in cell culture than particles of larger sizes yet it is not entirely clear why. We investigated the size dependent toxicity of silver nanoparticles by measuring the response...
Resource Type:: Masters Thesis
Full Text:: Nanoparticles in Zebrafish Embryos (Danio rerio) Abstract approved: Stacey L. Harper Many

Studies on effect of stabilizers, chelators and inherent periodicity on nanoparticle antioxidant activity

Creator:: Zhou, Zheng
Abstract:: The level of reactive oxygen species (ROS) is tightly regulated in biological systems as overproduction can lead to oxidative stress and result in a number of diseases. Due to its negative effects, antioxidants are studied and used against ROS in medicine, pharmaceuticals and therapeutics. Because of issues with the uptake...
Resource Type:: Masters Thesis
Full Text:: Abstract approved: ______________________________________________________ Stacey L. Harper The

Method development for characterizing the hydrophobicity of engineered nanoparticles

Creator:: Lee, Fang Yu
Abstract:: Characterizing the hydrophobicity of nanoparticles can help us understand their fate and transport in the environment, as well as how nanoparticles may interact with biological systems. However, contact angle and partition coefficient have limitations in measuring the hydrophobicity of nanoparticles, thus promising methods to measuring the hydrophobicity of nanoparticles are...
Resource Type:: Masters Thesis
Full Text:: Stacey L. Harper Characterizing the hydrophobicity of nanoparticles can help us understand their

Heteroaggregation between citrate-stabilized gold nanoparticles and hematite colloids : mechanisms and quantification of nanoparticle-colloid interactions

Creator:: Smith, Brian M.
Abstract:: Understanding the aggregation behavior of engineered nanomaterials (ENMs) in aqueous environments is essential to understanding their fate, transport, and toxicity. Because naturally occurring colloids will likely be present at much higher concentrations than ENMs in environmental systems, heteroaggregation and attachment with these natural colloids could significantly influence ENM fate and...
Resource Type:: Masters Thesis
Full Text:: of laboratory resources by Dr. Stacey Harper and Dr. Christine Kelly. Conversations with Ed

The effects of engineered coatings and natural organic matter on nanoparticle aggregation

Creator:: McDowell, Shannon A.
Abstract:: In order to better predict the aggregation state of nanomaterials, the factors that influence aggregation must be understood. The combined effects of natural and engineered coatings have been shown to factor into nanoparticle aggregation behavior in preliminary research. In this study, aggregation behaviors of gold nanoparticles with two different engineered...
Resource Type:: Masters Thesis

Development and applications of a high-throughput activity assay, using the ammonia-oxidizing bacteria Nitrosomonas europaea

Creator:: Bartow, Shannon M.
Abstract:: The rising demand on freshwater resources emphasizes the benefit of biogeochemical processes that maintain clean water by removing pollutants such as excess nitrogen. The most sensitive step in the removal of nitrogen from waterways is the oxidation of ammonia, a part of nitrification, which is carried out by ammonia oxidizing...
Resource Type:: Masters Thesis

ScholarsArchive@OSU

An in silico Approach to Determine the Influence of Surface Chemical Properties on the Toxicity of Engineered Zinc Oxide Nanoparticles

Assessing the Impacts of Size, Structure, and Surface Chemistry on the Toxicity of Two High Production Organic Nanomaterials using the Embryonic Zebrafish Model

A Review and Toxicological Evaluation of an Environmentally-Friendly Alternative to Silver Nanoparticles

Novel Approaches to Evaluate the Environmental Impacts of Nanomaterials

Size and surface area dependent toxicity of silver nanoparticles in zebrafish embryos (Danio rerio)

Studies on effect of stabilizers, chelators and inherent periodicity on nanoparticle antioxidant activity

Method development for characterizing the hydrophobicity of engineered nanoparticles

Heteroaggregation between citrate-stabilized gold nanoparticles and hematite colloids : mechanisms and quantification of nanoparticle-colloid interactions

The effects of engineered coatings and natural organic matter on nanoparticle aggregation

Development and applications of a high-throughput activity assay, using the ammonia-oxidizing bacteria Nitrosomonas europaea

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