U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Search Publications by: Elijah Petersen (Fed)

Search Title, Abstract, Conference, Citation, Keyword or Author
Displaying 26 - 50 of 100

Agglomeration of Escherichia coli with positively charged nanoparticles can lead to artifacts in a standard Caenorhabditis elegans toxicity assay

April 19, 2018
Author(s)
Shannon Hanna, Antonio Montoro Bustos, Alexander W. Peterson, Vytas Reipa, Leona D. Scanlan, Sanem Hosbas Coskun, Tae Joon Cho, Monique Johnson, Vincent A. Hackley, Bryant C. Nelson, Michael R. Winchester, John T. Elliott, Elijah Petersen
The increased use and incorporation of engineered nanoparticles (ENPs) in consumer products requires a robust assessment of their potential environmental implications. However, a lack of standardized methods for nanotoxicity testing has yielded results

Detection and Quantification of Graphene Family Nanomaterials in the Environment

March 5, 2018
Author(s)
David Goodwin, Adeyemi Adeyele, Li Piin Sung, Kay Ho, Robert Burgess, Elijah Petersen
An increase in production of commercial products containing graphene-family nanomaterials (GFNs) has led to concern over their release into the environment. The fate and potential ecotoxicological effects of GFNs in the environment are currently unclear

Counting Caenorhabditis elegans: Protocol Optimization and Applications for Population Growth and Toxicity Studies in Liquid Medium

January 17, 2018
Author(s)
Steven Lund, Sanem Hosbas Coskun, Monique Johnson, Christopher Sims, Elijah Petersen, John T. Elliott, Bryant C. Nelson, Leona D. Scanlan, Shannon K. Hanna, Karina Brignoni, Patricia Lapasett
The nematode Caenorhabditis elegans is used extensively in molecular, toxicological and genetics research. However, standardized methods for counting nematodes in liquid culture do not exist despite the wide use of nematodes and need for accurate

Sucrose density gradient centrifugation for efficient separation of engineered nanoparticles from a model organism, Caenorhabditis elegans

October 11, 2017
Author(s)
Monique E. Johnson, Antonio R. Montoro Bustos, Elijah J. Petersen, Shannon K. Hanna, Karen E. Murphy, Lee L. Yu, Bryant C. Nelson, Michael R. Winchester
This protocol describes a strategy for separating Caenorhabditis elegans (C. elegans) from engineered nanomaterials, a critical step for accurate quantification in uptake studies. Conventional rinsing procedures, typically comprised of water or buffer

Multiple method analysis of TiO2 nanoparticles uptake, accumulation and effects in rice (Oryza sativa L.) plants

August 4, 2017
Author(s)
Yinqging Deng, Elijah Petersen, Katie Challis, Savelas A. Rabb, Richard D. Holbrook, James Ranville, Bryant C. Nelson, Baoshan Xing
Understanding the translocation of nanoparticles (NPs) into plants is challenging because quantitative and qualitative methods are still being developed and the comparability of results among different methods is unclear. In this study, the uptake of NPs

Biological Uptake, Distribution and Depuration of Radio-labeled Graphene in Adult Zebrafish: Effects of Graphene Size and Natural Organic Matter

February 27, 2017
Author(s)
Kun Lu, Shipeng Dong, Elijah Petersen, Xiaofeng Chang, Peng Wang, Sijie Lin, Liang Mao
The exciting commercial application potential of graphene materials may inevitably lead to their increasing environmental exposure and risk. This study focused on using carbon-14 labeled few-layer graphene (FLG) to determine whether the size of graphene

Biophysical Characterization of Functionalized Titania Nanoparticles and Their Application in Dental Adhesives

February 2, 2017
Author(s)
Jirun Sun, Elijah J. Petersen, Stephanie S. Watson, Christopher M. Sims, Alexander Kassman, Stanislav A. Frukhtbeyn, Drago Skrtic, Meryem T. Ok, Deborah S. Jacobs, Qiang Ye, Bryant C. Nelson
It is demonstrated that carboxylic acid-functionalized titanium dioxide (TiO2) NPs produce significantly higher levels of reactive oxygen species (ROS) after visible light irradiation (400–800 nm, 1600 mW/cm2) in comparison to nonfunctionalized TiO2 NPs

Impact of UV irradiation on multiwall carbon nanotubes in nanocomposites: formation of entangled surface layer and mechanisms of release resistance

January 31, 2017
Author(s)
Tinh Nguyen, Elijah J. Petersen, Bastien T. Pellegrin, Justin M. Gorham, Thomas F. Lam, Minhua Zhao, Li Piin Sung
Carbon nanotubes (CNTs) are increasingly used in consumer and structural polymeric products to enhance a variety of properties. Under weathering, the polymer matrix will degrade and the nanofillers will potentially be released from the products, which

Increasing evidence indicates low bioaccumulation of carbon nanotubes

January 27, 2017
Author(s)
Rhema Bjorkland, David Tobias, Elijah Petersen
As the production of carbon nanotubes (CNTs) expands, so does the potential for release into the environment. The possibility of bioaccumulation and toxicological effects has prompted research on their fate and potential ecological effects. For many

Diffusion of multiwall carbon nanotubes (MWCNTs) through an HDPE geomembrane

January 4, 2017
Author(s)
Pooneh Taghizadeh-Saheli, R. K. Rowe, Elijah Petersen, Denis O'Carroll
The new applications for carbon nanotubes (CNTs) in various fields and consequently the increase in their production volume have increased their potential release to the environment. Landfills are one of the major locations where carbon nanotubes are

Separation, Sizing, and Quantitation of Engineered Nanoparticles in an Organism Model Using Inductively Coupled Plasma Mass Spectrometry and Image Analysis

December 16, 2016
Author(s)
Monique E. Johnson, Shannon Hanna, Antonio R. Montoro Bustos, Christopher M. Sims, Lindsay C. Elliott, Babak Nikoobakht, John T. Elliott, Richard D. Holbrook, Keana C. Scott, Karen E. Murphy, Elijah J. Petersen, Lee L. Yu, Bryant C. Nelson, Akshay Lingayat, Adrian C. Johnston
For environmental studies assessing uptake of orally ingested engineered nanoparticles (ENPs), a key step in ensuring accurate quantification of ingested ENPs is efficient separation of the organism from ENPs that are either nonspecifically adsorbed to the

Toward Achieving Harmonization in a Nano-cytotoxicity Assay Measurement through an Interlaboratory Comparison Study

September 29, 2016
Author(s)
John T. Elliott, Matthias Roesslein, Nam W. Song, Blaza Toman, Agnieszka Kinsner-Ovaskainen, Rawiwan Maniratanachote, Marc L. Salit, Elijah J. Petersen, Fatima Sequeira, Jieun Lee, Francois Rossi, Cordula Hirsch, Harald Krug, Wongsakorn Suchaoin, Peter Wick
Design and development of reliable cell-based nanotoxicology assays is important for ranking of potential hazardous engineered nanomaterials. Challenges to producing a reliable assay protocol include working with nanoparticle dispersions and living cell

Design, sensitivity analysis, and testing of a Caenorhabditis elegans nanoecotoxicity assay

August 11, 2016
Author(s)
Shannon Hanna, Gregory A. Cooksey, Bryant C. Nelson, John T. Elliott, Elijah J. Petersen
Increasing production and usage of engineered nanomaterials (ENMs) has generated widespread interest in measuring their environmental and human health effects. However, the lack of standardized methods for these measurements has often led to contradictory

Considerations of Environmentally-Relevant Test Conditions for Improved Evaluation of Ecological Hazards of Engineered Nanomaterials

June 8, 2016
Author(s)
Patricia Holden, Jorge Gardea-Torresdey, Frederick Klaessig, Ronald Turco, Monika Mortimer, Kerstin Hund-Rinke, David Avery, Damia Barcelo, Renata Behra, Yoram Cohen, Laurence Deydier-Stephan, Barbara Harthorn, Danail Hristozov, John Johnston, Agnes Kane, Larry Kaputska, Arturo Keller, Hunter Lenihan, Wess Lovell, Catherine Murphy, Roger Nisbet, Elijah Petersen, Martin Scheringer, Monita Sharma, David Speed, Yasir Sultan, Jason White, Eva Wong, Baoshan Xing, Meghan Steele Horan, Hilary Godwin, Andre Nel
Engineered nanomaterials (ENMs) entering the environment could impact biological populations or entire ecosystems. Ecotoxicology aims to determine effective concentrations, which often exceed those in the environment. ENM behaviors in complex media impede

Quantification of carbon nanotubes in environmental matrices: Current capabilities, case studies, and future improvements

April 6, 2016
Author(s)
Elijah J. Petersen, D. X. Flores-Cervantes, Thomas Bucheli, Lindsay C. Elliott, Jeffrey A. Fagan, Alexander Gogos, Shannon Hanna, Antonio R. Montoro Bustos, Desiree L. Plata, Vytautas Reipa, Paul Westerhoff, Michael R. Winchester, Elisabeth Mansfield
Carbon nanotubes (CNTs) have numerous exciting potential applications approaching commercialization. As such, quantitative measurements of CNTs in key environmental matrices (water, soil, sediment, and biological tissues) are needed to address concerns

GC-MS/MS Measurement of Nanomaterial Induced Genotoxicity in Isolated DNA

November 24, 2015
Author(s)
Bryant C. Nelson, Elijah J. Petersen, Pawel Jaruga, M Miral Dizdar
Making accurate measurements of the environmental fate and environmental and biological effects of engineered nanomaterials (ENMs) is critical for reliable risk assessment of these materials. ENM induced oxidative stress and/or direct binding of ENMs to