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Author: Steven Christopher

Displaying records 1 to 10 of 32 records.
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1. Influence of mercury and selenium chemistries on the progression of cardiomyopathy in pygmy sperm whales, Kogia breviceps
Published: 10/1/2012
Authors: Colleen E Bryan, William C Davis, Wayne E. McFee, Carola A. Neumann, Jennifer Schulte, Gregory D. Bossart, Steven J Christopher
Abstract: More than half of pygmy sperm whales (Kogia breviceps) that strand exhibit signs of cardiomyopathy (CMP). Many factors may contribute to the development of idiopathic CMP in K. breviceps, including genetics, infectious agents, contaminants, biotoxin ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906134

2. Development and Certification of Green Tea-Containing Standard Reference Materials
Published: 11/30/2011
Authors: Lane C Sander, Mary Bedner, Michael C. Tims, James H Yen, David Lee Duewer, Barbara J. Porter, Steven J Christopher, Russell D Day, Stephen E Long, John L Molloy, Karen E Murphy, Brian E Lang, Rachel A. Lieberman, Laura J Wood, M. Payne, M. C. Roman, J. M. Betz, A. NguyenPho, Katherine E Sharpless, Stephen A Wise
Abstract: A suite of three green tea-containing Standard Reference Materials (SRMs) has been issued by the National Institute of Standards and Technology (NIST). The materials are characterized for catechins, xanthine alkaloids, theanine, and toxic elements. ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906814

3. EVALUATION OF A MICROWAVE-ASSISTED METAL-LABELING STRATEGY FOR QUANTIFICATION OF PEPTIDES VIA RPLC-ICP-MS AND THE METHOD OF STANDARD ADDITIONS
Published: 11/26/2011
Authors: Steven J Christopher, Eric L Kilpatrick, Lee Lijian Yu, William C Davis, blakely adair
Abstract: NIST has performed preliminary research on applying a calibration methodology based on the method of standard additions to the quantification of lanthanide-labeled peptides via reverse-phase liquid chromatography coupled to inductively coupled plasma ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907016

4. Specimen Banking for Marine Animal Health Assessment
Published: 11/8/2010
Authors: John R Kucklick, Rebecca S Pugh, Paul R Becker, Jennifer M Keller, Russell D Day, Jennifer Yordy, Amanda J Moors, Steven J Christopher, Colleen E Bryan, Lori Schwacke, Randall S. Wells, Brian C. Balmer, Aleta Hohn, Teri Rowles
Abstract: Marine animals are faced with health threats including disease and accumulation of toxic pollutants. There are several efforts in the USA seeking to relate health metrics to the exposure of marine animals to pollution, biotoxins, and disease. The Na ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=905334

5. IMEP-28: Total Arsenic, Cadmium, Lead and Mercury in Food Supplements
Published: 10/30/2009
Authors: Lane C Sander, Stephen E Long, Steven J Christopher, Russell D Day, Karen E Murphy, Ines Baer, Beatriz de la Calle, Inge Verbist, Danny Vendelbo, Hakan Emteborg, Philip Taylor
Abstract: The Institute for Reference Materials and Measurements (IRMM) of the Joint Research Centre (JRC), a Directorate-General of the European Commission, operates the International Measurement Evaluation Programme IMEP. It organises interlaboratory compari ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903993

6. Consideration and Influence of Complexed forms of Mercury Species on the reactivity Patterns Determined by Speciated Isotope Dilution Model Approaches: A Case for Natural Biological Reference Materials
Published: 6/1/2008
Authors: David Point, J. I. Garcia Alonso, William C Davis, Steven J Christopher, Aurore Guichard, O.F. X. Donard, Paul R Becker, Gregory C Turk, Stephen A Wise
Abstract: The origins and the processes driving the inadvertent transformations of inorganic mercury (iHg) and methylmercury (MeHg) in cryogenically stored and homogenized fresh-frozen versus freeze-dried biological Standard Reference Materials (SRM) were inve ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=832174

7. Certification of Methylmercury Content in Two Fresh-Frozen Reference Materials: SRM 1947 Lake Michigan Fish Tissue and SRM 1974b Organics in Mussel tissue
Published: 10/1/2007
Authors: William C Davis, Steven J Christopher, Rebecca S Pugh, Olivier F. X. Donard, E Krupp, David Point, M. Horvat, D. Gibicar, Z. Kljakovic-Gaspic
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904237

8. Description and Results of the NIST/NOAA 2005 Interlaboratory Comparison Exercise for Trace Elements in Marine Mammals
Published: 10/1/2007
Authors: Rebecca S Pugh, Steven J Christopher, Michael B. Ellisor, Elizabeth A Mackey, Rabia Oflaz Oflaz, Barbara J. Porter, Kathie J Bealer, John R Kucklick, Paul R Becker, T K Rowles
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904236

9. Development and Application of an Ultratrace Method for Speciation of Organotin Compounds in Cryogenically Archived and Homogenized Biological Materials
Published: 10/1/2007
Authors: William C Davis, David Point, Steven J Christopher, Michael B. Ellisor, Rebecca S Pugh, Paul R Becker, Barbara J. Porter, Stephen A Wise, Olivier F. X. Donard
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904256

10. Improved Certified Values for Total Mercury and Speciated Mercury in NIST Standard Reference Materials Using Isotope Dilution ICP-MS
Published: 10/1/2007
Authors: Stephen E Long, William C Davis, Steven J Christopher, Jacqueline L Mann, William R. Kelly
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904246