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.

Chemistry

Analytical chemistry

Search Publications

Search Title, Abstract, Conference, Citation, Keyword or Author
  • Published Date
Displaying 926 - 950 of 2094

Universal Proteolysis and MSn for N- and O- Glycan Branching Analysis

April 20, 2013
Author(s)
John E. Schiel, Karen W. Phinney, Nicholas J. Smith
The continually growing list of critical glycosylation-related processes has made analytical methodology for detailed glycan characterization an area of increasing interest. Glycosylation is a post translational modification of unsurpassed complexity due

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

Evaluation of Pacific White Shrimp (Litopenaeus vannamei) Health During a Superintensive Aquaculture Growout using NMR-based Metabolomics

March 27, 2013
Author(s)
Tracey B. Schock, Dan Bearden, Jessica Duke, Abby Goodson, Daryl Weldon, Jeff Brunson, John Leffler
Success of the shrimp aquaculture industry requires technological advances that increase production and environmental sustainability. Indoor, superintensive, aquaculture systems have been developed that permit year-round production of farmed shrimp at high

Detection of E-cyanomethanimine (HCN-dimer) towards Sagittarius B2(N) from the GBT PRIMOS Survey

March 20, 2013
Author(s)
Francis J. Lovas, Daniel P. Zaleski, Nathan A. Seifert, Amanda L. Steber, Matt T. Muckle, Ryan A. Loomis, Joanna F. Corby, Oscar Martinez, Kyle Crabtree, Phillip R. Jewell, Jan M. Hollis, David Vasquez, Jolie Nyiramahirwe, Nicole Sciortino, Kennedy Johnson, Michael C. McCarthy, Anthony J. Remijan, Brooks H. Pate
An understanding of the formation, distribution and overall excitation of large molecules in astronomical environments remains in question even though more than 170 distinct chemical compounds have been detected in astronomical environments. Furthermore, a

FACTORS INFLUENCING EXPOSURE TO ORGANOHALOGEN CONTAMINANTS IN PREDATORY BIRDS FROM COASTAL SOUTH CAROLINA, USA

March 15, 2013
Author(s)
Jessica L. Reiner, Jennifer Yordy, Sam Rossman, Peggy H. Ostrom, Stacy Hughes, Keely Bargnesi, James D. Elliot
Predatory bird species occupy high trophic levels and consequently are susceptible to bioaccumulating high levels of environmental contaminants. To evaluate potential risks from exposure to past- and current- use contaminants, levels of legacy contaminants

Quantitative measurements of glutathione in yeast cell lysate using 1H NMR

February 20, 2013
Author(s)
Steve Y. Rhieu, Aaron A. Urbas, Katrice Lippa, Vytas Reipa
A method for quantifying the level of glutathione (GSH) in yeast cell lysate is described using 1H NMR analysis. For quantification purposes, the 1H resonances corresponding to the Cys βCH2 of GSH were identified as having the fewest overlapping spectral

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

The Detection of Interstellar Ethanimine (CH3CHNH) from Observations taken during the GBT PRIMOS Survey

February 13, 2013
Author(s)
Francis J. Lovas, Ryan A. Loomis, Daniel P. Zaleski, Amanda L. Steber, Justin L. Neill, Matthew T. Muckle, Brent J. Harris, Jan M. Hollis, Phillip R. Jewell, Valerio Lattanzi, Oscar Martines, Michael C. McCarthy, Anthony J. Remijan, Brooks H. Pate
As the availab¬¬ility of publicly accessible spectral line surveys from radio astronomy increases, new approaches to the identification of molecules in the interstellar medium are possible. We have performed reaction product screening measurements using
Was this page helpful?