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Displaying 176 - 200 of 1605

Hydroxyl radical is a significant player in oxidative DNA damage in vivo.

June 15, 2021
Author(s)
Miral M. Dizdar, Barry Halliwell, Amitav Adhikary, Michael Dingfelder
Recent publications have suggested that oxidative DNA damage mediated by hydroxyl radical (.OH) is unimportant in vivo, and that carbonate anion radical (CO3.-) plays the key role. We examine these claims and summarize the evidence that OH does play a key

Ne-22 Ion-Beam Radiation Damage to DNA: From Initial Free Radical Formation to Resulting DNA-Base Damage

June 14, 2021
Author(s)
Melis Kant, Pawel Jaruga, Erdem Coskun, Samuel Ward, Alexander Stark, Thomas Baumann, David Becker, Amitava Adhikary, Michael Sevilla, Miral M. Dizdar
We report on the physicochemical processes and the products of DNA damage involved in Ne-22 ion-beam radiation of hydrated (12±3 H2O/nucleotide) salmon sperm DNA at 77 K. Free radicals trapped at 77 K were identified using electron spin resonance (ESR)

Plasmonic Sensing Studies of a Gas-Phase Cystic Fibrosis Marker in Moisture Laden Air

May 29, 2021
Author(s)
Libin Sun, Drew Hall, Douglas Conrad, Kurt D. Benkstein, Stephen Semancik, Mona Zaghloul
A plasmonic sensing platform was developed as a noninvasive method to monitor gas-phase biomarkers related to cystic fibrosis (CF). The nanohole array (NHA) sensing platform is based on localized surface plasmon resonance (LSPR) and offers a rapid data

Revision of the SNPforID 34-plex forensic ancestry test: Assay enhancements, standard reference sample genotypes and extended population studies

May 3, 2021
Author(s)
John Butler, Manuel Fondevila, Carla Santos, Ana Freire, Christopher Phillips, M Lareu, Peter Vallone
A revision of an established 34 SNP forensic ancestry test has been made by swapping the under- performing rs727811 component SNP with the highly informative rs3827760 that shows a near-fixed East Asian specific allele. We collated SNP variability data for

Characterization of extracellular vesicles and artificial nanoparticles with four orthogonal single-particle analysis platforms

April 6, 2021
Author(s)
Emily Mallick, Tanina Arab, Yiyao Huang, Liang Dong, Zhaohao Liao, Zezhou Zhao, Barbara Smith, Norman J. Haughey, Kenneth Pienta, Barbara Slusher, Patrick Tarwater, Juan Pablo Tosar, Angela M. Zivkovic, Wyatt N. Vreeland, Michael E. Paulaitis, Kenneth W. Witwer
We compared four orthogonal technologies for sizing, counting, and phenotyping of extracellular vesicles (EVs) and synthetic particles. The platforms were: single-particle interferometric reflectance imaging sensing (SP-IRIS) with fluorescence

Hydration of Hydrophilic Cloth Facial Coverings Greatly Increases the Filtration Properties for Nanometer and Micrometer-sized Particles

March 8, 2021
Author(s)
Christopher D. Zangmeister, James Radney, Matthew E. Staymates, Edward P. Vicenzi, Jamie Weaver
Filtration efficiencies (FE) of natural, synthetic, and blended fabrics were measured as a function of relative humidity (RH) for particles with mobility diameters between 50 nm and 825 nm. Fabrics were equilibrated at 99 % RH, mimicking conditions

National Institute of Standards and Technology Environmental Scan 2020

February 9, 2021
Author(s)
Heather Evans, Kristen K. Greene, William M. Healy, Elizabeth Hoffman, Kate Rimmer, Anna V. Sberegaeva, Neil M. Zimmerman
The 2020 National Institute of Standards and Technology Environmental Scan provides an analysis of key external factors that could impact NIST and the fulfillment of its mission in coming years. The analyses were conducted through four separate lenses

Chromosome-scale, haplotype-resolved assembly of human genomes

December 7, 2020
Author(s)
Justin Zook, Shilpa Garg, Heng Li
Haplotype-resolved or phased genome assembly provides a complete picture of genomes and their complex genetic variations. However, current algorithms for phased assembly either do not generate chromosome-scale phasing or require pedigree information, which

Chapter 4: Oxidatively induced DNA damage: Mechanisms and measurement

November 20, 2020
Author(s)
Miral M. Dizdar, Erdem Coskun, Gamze Tuna, Melis Kant, Pawel Jaruga
Oxidatively induced damage to DNA occurs in living organisms by endogenously or exogenously generated reactive species including free radicals. Mounting evidence suggests that this type of DNA damage plays an important role in the etiology of numerous

A Case Study of Medical Device Wireless Coexistence Evaluation

October 1, 2020
Author(s)
Mohamed Al-Kalaa, Joshua Guag, Seth Seidman, Yao Ma, Jason Coder
This article aims to provide a narrative for addressing wireless coexistence in medical devices to help medical device developers, test engineers, and regulatory affairs personnel throughout the device life cycle. Accordingly, we present a case-study
Displaying 176 - 200 of 1605