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Displaying 1 - 25 of 2013

Comparison of N-glycopeptide to released N-glycan abundances and the influence of glycopeptide mass and charge state on N-linked glycosylation of IgG antibodies

March 7, 2024
Concepcion Remoroza, Meghan Burke Harris, Tytus Mak, Sergey Sheetlin, Yuri Mirokhin, Zachary Goecker, Brian T. Cooper, Mark Lowenthal, Xiaoyu (Sara) Yang, Guanghui Wang, Dmitrii V. Tchekhovskoi, Stephen E. Stein
We report the comparison of mass-spectral-based abundances of tryptic glycopeptides to fluorescence abundances of released labeled glycans and the effects of mass and charge state and in-source fragmentation on glycopeptide abundances. The primary

Certification of Standard Reference Material(R) 1595a Tripalmitin

March 1, 2024
Michael Nelson, Jerome Mulloor, Brian Lang, Blaza Toman, Antonio Possolo, William Perry, Alicia Lyle
Standard Reference Material (SRM) 1595a Tripalmitin is a high purity chemical substance having a certified value for purity, expressed as a mass fraction. It is intended for use in preparing calibrants for measurement of total glyceride in clinical samples

Correlating Near-Infrared Spectra to Bulk Properties in Polyolefins

February 28, 2024
Bradley Sutliff, Shailja Goyal, Tyler Martin, Peter Beaucage, Debra Audus, Sara Orski
The industry standard for sorting plastic wastes is near-infrared (NIR) spectroscopy, which offers rapid and nondestructive identification of various plastics. However, NIR does not provide insights into the chain composition, conformation, and topology of

Establishing a framework for best practices for quality assurance and quality control in untargeted metabolomics

February 12, 2024
Tracey Schock, Jonathan Mosley, Chris Beecher, Warwick Dunn, Julia Kuligowski, Matthew Lewis, Georgios Theodoridis, Candice Ulmer, Dajana Vuckovic, Ian Wilson, Krista Zanetti
Background: Quality assurance (QA) and quality control (QC) practices are key tenets that facilitate study and data quality across all applications of untargeted metabolomics. Such important practices will strengthen this field and accelerate its success

Certification of Standard Reference Material(R) 2983 Inorganics in Geoduck Clam Tissue (Panopea generosa)

January 29, 2024
Colleen E. Bryan Sallee, Melannie Bachman, Steven J. Christopher, Debra Ellisor, Michael Ellisor, Jennifer Hoguet, Samuel Huntington, Caleb Luvonga, Amanda Moors, Dhayaalini Nadarajan, Tomohiro Narukawa, Jennifer Ness, Rebecca Pugh, James H. Yen, Lee L. Yu
Standard Reference Material (SRM) 2983 Inorganics in Geoduck Clam Tissue (Panopea generosa) is intended to be used for the evaluation of methods for the determination of elements, arsenic species, and proximates in this and similar matrices. A unit of SRM

Per- and Polyfluoroalkyl Substances in Firefighter Turnout Gear Textiles Exposed to Abrasion, Elevated Temperature, Laundering, or Weathering

January 16, 2024
Andrew Maizel, Andre Thompson, Meghanne Tighe, Samuel Escobar Veras, Alix Rodowa, Ryan Falkenstein-Smith, Bruce A. Benner Jr., Kathleen Hoffman, Michelle K. Donnelly, Olivia Hernandez, Nadine Wetzler, Trung Ngu, Jessica Reiner, Benjamin Place, John Kucklick, Kate Rimmer, Rick D. Davis
Textiles used in the construction of structural firefighter turnout gear jackets and pants have been found to contain per- and polyfluoroalkyl substances (PFAS) as well as fluoropolymer membranes and treatments containing fluorinated polymers. Additionally

Characterizing Styrene Monomer and Oligomers by SEC/MALS/VISC/DRI

January 10, 2024
Andre Striegel
Worldwide polystyrene (PS) production in 2020 was approximately 27 million metric tons, distributed among many nations, making it one of the most heavily imported and exported chemicals. Commercially produced PS usually possesses a broad molar mass

Recommendations from the Ocean Carbonate System Intercomparison Forum: Quantifying and reducing uncertainties in the calculations of carbonate system equilibrium in the oceans

December 14, 2023
Brendan Carter, Jonathan Sharp, Andrew Dickson, Marta Alvarez, Michael Fong, Maribel Garcia-Ibanez, Ryan Woosley, Takeshita Yuichiro, Leticia Barbero, Robert Byrne, Wei-Jun Cai, Melissa Chierici, Simon Clegg, Regina Easley, Andrea Fassbender, Kalla Fleger, Xinyu Li, Macarena Martin-Mayor, Katelyn Schockman, Aleck Wang Zhaohui
The ocean carbonate system is critical to monitor because it plays a major role in regulating Earth's climate and marine ecosystems. It is monitored using a variety of measurements, and it is commonly understood that all major components of the seawater

Best practices in NMR metabolomics: Current state

December 12, 2023
Tracey Schock, Amanda Bayless, Goncalo Gouveia, Robert Powers, Valerie Copie, John Cort, Hamid R. Eghbalnia, Wimal Pathmasiri, David S Wishart, Erik Andersson, Robert Brua, Leo Cheng, Chaevien Clendinen, Darcy Cochran, Alexandra Crook, Michah Jeppesen, Amith Maroli, Matthew Merritt, Heidi Roth, Isin Sakallioglu, Saurav Sarma, Lloyd Sumner, Panteleimon Takis, Mario Uchimiya
A literature survey was conducted to identify current practices used by NMR metabolomics investigators. A total of 463 papers from 2020 and 80 papers from 2010 were selected from PubMed. The papers were manually analyzed by a team of investigators to

Untargeted metabolomics analyses and contaminant chemistry of Dreissenid mussels at the Maumee River Area of Concern in the Great Lakes

November 22, 2023
Tracey Schock, Daniel Bearden, Fabio Casu, Michael Edwards, Annie Jacob, Edward Johnson, Amanda Bayless, Elena Legrand
Bivalves stand out as an ideal ecological indicator and have been the basis of NOAA's Mussel Watch Program to monitor environmental health. In this study, we aimed to investigate the health of the Dreissenid mussel in the Maumee River. In addition to the

Metabolomics 2022 Workshop Report: State of QA/QC Best Practices in LC-MS-Based Untargeted Metabolomics, Informed Through mQACC Community Engagement Initiatives

November 8, 2023
Tracey Schock, Warwick Dunn, Julia Kuligowski, Jonathan Mosley, Candice Ulmer Holland, Dajana Vuckovic
Introduction: The Metabolomics Quality Assurance and Quality Control Consortium (mQACC) organized a workshop during the Metabolomics 2022 conference. Objectives: The goal of the workshop was to disseminate recent findings from mQACC community-engagement

Recommendations for setting a criterion and assessing commutability of sample materials used in external quality assessment/proficiency testing schemes

November 2, 2023
Sverre Sandberg, Pernille Fauskanger, Jesper Johansen, Thomas Keller, Jeffrey Budd, Neil Greenberg, robert rej, MAURO PANTEGHINI, VINCENT DELATOUR, Ferruccio Ceriotti, Liesbet Deprez, Johanna Camara, Finlay MacKenzie, Alicia Lyle, Eline van der Hagen, Chris Burns, W. Greg Miller
It is important for external quality assessment materials (EQAMs) to be commutable with clinical samples; i.e., they should behave like clinical samples when measured using end-user clinical laboratory in vitro diagnostic medical devices (IVD-MDs). Using

Single-Detector Double-Beam Modulation for High-Sensitivity Infrared Spectroscopy

October 25, 2023
Seongmin Kim, Yow-Ren Chang, Young Jong Lee
Balanced detection based on double beams is widely used to reduce common-mode noises, such as laser intensity fluctuation and irregular wavelength scanning, in absorption spectroscopy. However, employing an additional detector can increase the total system

Host Defense Peptide Piscidin and Yeast-derived Glycolipid Exhibit Synergistic Antimicrobial Action through Concerted Interactions with Membranes

October 19, 2023
Fei Liu, Alexander Greenwood, Yawei Xiong, Rebecca Miceli, Riqiang Fu, Kyle Anderson, Scott McCallum, Ella Mihailescu, Richard Gross, Myriam Cotten
Developing new antimicrobials as alternatives to conventional antibiotics has become an urgent race to eradicate drug-resistant bacteria and save human lives. Conventionally, antimicrobial molecules are studied independently even though they can be co
Displaying 1 - 25 of 2013