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Displaying 26 - 50 of 120

Trace Element Biodistribution in the American alligator (Alligator mississippiensis)

April 23, 2017
Author(s)
Frances Nilsen, Brittany L. Kassim, Patrick Delaney, Ted Lange, Arnold Brunell, Stephen E. Long, Tracey B. Schock, Louis J. Guillette Jr.
Routine monitoring of contaminant levels in wildlife is an important measure of ecosystem health and also can identify potential human health implications. This is particularly important when the monitored species is recreationally hunted for human

Development of Two Fine Particulate Matter Standard Reference Materials ( 4 mm and 10 mm) for the Determination of Organic and Inorganic Constituents

April 13, 2016
Author(s)
Michele M. Schantz, Danielle Cleveland, N. Alan Heckert, John Kucklick, Stefan D. Leigh, Stephen E. Long, Jennifer Lynch, Karen E. Murphy, Rabia Oflaz, Adam L. Pintar, Barbara J. Porter, Savelas A. Rabb, Stacy Schuur, Stephen Wise, Rolf L. Zeisler
Two new Standard Reference Materials (SRMs), SRM 2786 Fine Particulate Matter ( 4 µm) and SRM 2787 Fine Particulate Matter ( 10 µm) have been developed in support of the US Environmental Protection Agency's National Ambient Air Quality Standards for

Global DNA methylation loss associated with mercury contamination and aging in the American alligator (Alligator mississippiensis)

March 1, 2016
Author(s)
Frances Nilsen, John Bowden, Brittany L. Kassim, Colleen E. Bryan Sallee, Stephen E. Long, Benjamin B. Parrott, Stephen E. Somerville, Ted Lange, Patrick Delaney, Arnold Brunell, Louis J. Guillette
Mercury is a widespread environmental contaminant with exposures eliciting a well-documented catalog of negative outcomes in animals. Yet, our knowledge regarding the underlying mechanisms by which mercury exposures exert these effects remains incomplete

Urinary iodine and stable isotope analysis to examine habitat influences on thyroid hormones among coastal dwelling American alligators

December 9, 2015
Author(s)
Ashley S. Boggs-Russell, Heather J. Hamlin, James C. Nifong, Brittany L. Kassim, Russell H. Lowers, Thomas M. Galligan, Stephen E. Long, Louis J. Guillette Jr.
The American alligator, a freshwater species, is known to forage in marine environments which could lead to increased dietary uptake of iodine, a nutrient necessary for the production of thyroid hormones. To explore the influence of dietary iodine on

Certification of Elements in and Use of Standard Reference Material 3280 Multivitamin/Multielement Tablets

December 2, 2013
Author(s)
Gregory C. Turk, Katherine E. Sharpless, Steven J. Christopher, Danielle Cleveland, Russell D. Day, Stephen E. Long, Elizabeth A. Mackey, Anthony F. Marlow, Rick L. Paul, John R. Sieber, Rabia Oflaz, Laura J. Wood, Lee L. Yu, Rolf L. Zeisler, Stephen A. Wise, James H. Yen, E. Greene, J. Harnly, I-P Ho, Joseph M. Betz, R. Q. Thompson, Candace Jongsma
Standard Reference Material (SRM) 3280 Multivitamin/Multielement Tablets was issued by the National Institute of Standards and Technology (NIST) in 2009 and has certified and reference mass fraction values for 13 vitamins, 26 elements, and 2 carotenoids

Determination of Trace Sulfur in Biodiesel and Diesel Standard Reference Materials by Isotope Dilution Sector Field Inductively Coupled Plasma Mass Spectrometry

November 14, 2013
Author(s)
Steven J. Christopher, Stephen E. Long, Renata Amais, Joaquim N?ga
A method is described for quantification of sulfur at low concentrations on the order of 10 µg g-1 in biodiesel and diesel fuels using double isotope dilution and sector field inductively coupled plasma mass spectrometry (ID-SF-ICP-MS). Closed vessel

Development of a Standard Reference Material for Metabolomics Research

November 4, 2013
Author(s)
Karen W. Phinney, Guillaume Ballihaut, Mary Bedner, Johanna Camara, Steven J. Christopher, William C. Davis, Nathan G. Dodder, Brian E. Lang, Stephen E. Long, Mark S. Lowenthal, Elizabeth A. McGaw, Karen E. Murphy, Bryant C. Nelson, Jocelyn L. Prendergast, Jessica L. Reiner, Catherine A. Rimmer, Lane C. Sander, Michele M. Schantz, Katherine E. Sharpless, Lorna T. Sniegoski, Susan S. Tai, Jeanice M. Brown Thomas, Thomas W. Vetter, Michael J. Welch, Stephen A. Wise, Laura J. Wood, William F. Guthrie, Robert C. Hagwood, Stefan D. Leigh, James H. Yen, Nien F. Zhang, Madhu Chaurhary-Webb, Huiping Chen, Bridgette Haynes, Donna J. LaVoie, Leslie F. McCoy, Shahzad S. Momin, Neelima Paladugula, Elizabeth C. Pendergrast, Christine M. Pfeiffer, Carissa D. Powers, Zia Fazili-Qari, Daniel Rabinowitz, Michael E. Rybak, Rosemary L. Schleicher, Mary Xu, Mindy Zhang, Arthur L. Castle, Brandi S. Benford, Gauthier Eppe

A simple and sensitive HPLC-ICP-MS method for the accurate determination of Vitamin B12 in Fortified Breakfast Cereals and Multivitamin Tablet Reference Materials

April 10, 2013
Author(s)
Siva K. Chinthalapati, Lee L. Yu, John E. Schiel, Stephen E. Long
A sensitive high performance liquid chromatography (HPLC) coupled with inductively coupled plasma mass spectrometry (ICP-MS) method has been developed for the determination of vitamin B12. The method was based on efficient isocratic separation with a

Fast standard addition method for LA-ICPMS using a spinning platform

February 19, 2013
Author(s)
John L. Molloy, Stephen E. Long, Fanny Claverie, Julian Malherbe, Naomi Bier
A method has been developed for the fast and easy determination of Pb, Sr, Ba, Ni, Cu, and Zn, which are of geological and environmental interest, in solid samples by Laser Ablation Inductively Coupled Plasma Mass Spectrometry (LA-ICPMS) using a sample