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.

Search Publications

NIST Authors in Bold

Displaying 701 - 725 of 3841

NIST 38. NIST Spectroscopic Properties of Atoms and Atomic Ions Database

October 16, 2008
Author(s)
J R. Rumble
… The NIST Spectroscopic Properties of Atoms and Atomic Ions Database provides listings of prominent air or vacuum … atomic ions, atomic physics, atomic spectroscopy, energy levels, … NIST 38. NIST Spectroscopic Properties of Atoms and Atomic Ions Database …

Microstructure effects on the fracture surface resistance of base metal in line pipe steels in high pressure H2 gas

April 29, 2025
Author(s)
Andrew LeBoeuf, Santigopal Samanta, Joseph Ronevich, Christopher San Marchi, Zachary Buck, Matthew Connolly, Lawrence Cho, Kip Findley
… Cost-effective transportation of gaseous hydrogen requires the use of long-distance low-carbon steel … exhibit decreased fracture resistance due to exposure to hydrogen, recent data shows that fracture resistance can vary … the fracture response of modern pipeline grades in hydrogen gas. ASTM E1820 fracture toughness tests were …

Assessing girth weld quality of pipeline steels and their susceptibility to hydrogen embrittlement

August 28, 2024
Author(s)
Zack Buck, Newell Moser, Nicholas Derimow, May Ling Martin, Damian Lauria, Enrico Lucon, Douglas Stalheim, Peter Bradley, Matthew Connolly
… Hydrogen has long been considered a viable carbon-free option … and alternative technologies. However, the effects of hydrogen-assisted damage mechanisms that result in the … reduction in ductility, and fracture when exposed to hydrogen. Predicting lifetimes of pipelines can be difficult …

Calcium and phosphate ion releasing composite: Effect of pH on release and mechanical properties

October 27, 2008
Author(s)
Hockin D. Xu, Michael Weir, Limin Sun
… “smart” to increase the calcium (Ca) and phosphate (PO4) ion release at cariogenic pH. Methods. TTCP was ball-milled … level mass fractions varied from 0% to 75%. Ca and PO4 ion release were measured vs. time at pH of 7.4, 6, and 4. … mechanical properties, tooth caries inhibition, Ca and PO4 ion release …

Binding Energies in Atomic Negative Ions: III

November 14, 2018
Author(s)
T Andersen, H K. Haugen, H Hotop
… splittings and excited state energies of negative ions as well as lifetimes of metastable states are given. … ab initio calculations, atomic negative ions, binding energy, electron affinity, excited states, … Binding Energies in Atomic Negative Ions: III …

Optimal transport and colossal ionic mechano-conductance in graphene crown ethers

July 12, 2019
Author(s)
Subin Sahu, Justin E. Elenewski, Christoph Rohmann, Michael P. Zwolak
… Biological ion channels balance electrostatics and hydration, yielding large ion selectivities alongside high transport rates. These … transport conditions. Crown ethers are known for selective ion adsorption. When embedded in graphene, however, transport … Ion transport, Nanopores, Ion channels, Crown ether …

Pore Modulation of Hydrogen-Bonded Organic Frameworks for Efficient Separation of Propylene

September 11, 2023
Author(s)
Youlie Cai, Junkuo Gao, Jing-Hong Li, Puxu Liu, Yanchun Zheng, Wei Zhou, Hui Wu, Libo Li, Rui-Biao Lin, Banglin Chen
… Developing hydrogen-bonded organic frameworks (HOFs) that combine … there is a lack of effective strategies to tune the hydrogen-bonded network to achieve high-performance HOFs. … by introducing structure-directing agents (SDAs) into the hydrogen-bonding network of tetrakis (4-carboxyphenyl) …

Quantifying Long-Time Hydrogen-Deuterium Exchange of Bovine Serum Albumin with Hydrogen-Deuterium Exchange Small-Angle Neutron Scattering

January 9, 2025
Author(s)
Roisin Donnelly, Norman J. Wagner, Yun Liu
… Hydrogen−deuterium exchange (HDX) measured by small-angle … fluctuations and that for exchanging an amide hydrogen. Adding a tonicity agent of 150 mM NaCl has only a … Quantifying Long-Time Hydrogen-Deuterium Exchange of Bovine Serum Albumin with Hydrogen-Deuterium Exchange Small-Angle Neutron Scattering …

NMR Spectroscopy and Multiscale Modeling Shed Light on Ion-Solvent Interactions and Ion Pairing in Aqueous NaF Solutions

September 10, 2024
Author(s)
Gosia Musial, Demian Riccardi, Chris Suiter, Ethan Sontarp, Samantha Miller, Robert Lirette, Kyle Covington-Rehmeier, Avik Mahata, Chris Muzny, Angela Stelson, Kathleen Schwarz, Jason A. Widegren
… The balance between ion solvation and ion pairing in aqueous solutions modulates chemical and … quantitative determination of the distribution of ion-solvation and ion-pairing states remains elusive. Here, … NMR Spectroscopy and Multiscale Modeling Shed Light on Ion-Solvent Interactions and Ion Pairing in Aqueous NaF …

Ion Storage Group Website

January 1, 1997
Author(s)
Wayne M. Itano, B E. King, John J. Bollinger, D J. Berkeland
… http://tf.nist.gov/ion/index.htm … Ion Storage Group Website …

Loss of 45 Da from a2 Ions and Preferential Loss of 48 Da from a2 Ions Containing Methionine in Peptide Ion Tandem Mass Spectra

January 29, 2011
Author(s)
Yamil Simon, Pedatsur Neta, Xiaoyu Yang, Stephen E. Stein
… which correspond to a neutral loss of 45 Da from a 2 ions. From exact mass analysis this loss is ascribed to … formamide (or NH 3 +CO). Elimination of formamide from a 2 ions requires that the ions cyclize. A mechanism for this … other neutral losses, such as H 2 O. However, if the a 2 ion contains methionine, a neutral loss of 48 Da, ascribed to …

Modelling Study of Interactions of Ozone and Hydrogen Peroxide on Indoor Surfaces

March 15, 2023
Author(s)
Dustin Poppendieck, Toby J. Carter, David Shaw, Nicola Carslaw
… model, INCHEM-Py, to quantify the impact that ozone and hydrogen peroxide deposition onto internal surfaces has on … radical concentrations are 40% lower than following hydrogen peroxide deposition onto the same surfaces. Total … ppbv following ozone deposition, but were negligible for hydrogen peroxide deposition. Surface deposition, …

Detection and identification of sugar alcohol sweeteners by ion mobility spectrometry

June 23, 2016
Author(s)
Thomas Forbes, Edward Sisco, Christopher Browne
… of sugar alcohols sweeteners was demonstrated using ion mobility spectrometry (IMS). IMS provides a valuable … Ion mobility spectrometry, Sugar alcohols, Alternative … Detection and identification of sugar alcohol sweeteners by ion mobility spectrometry …

Treasure of the Past: II. The Atomic Weight of Bromine

July 1, 2000
Author(s)
Alan Weber
… For chlorine a number of determinations of the ratio of hydrogen to chlorine in hydro-choleric acid have been made, … been made. Since the determination of the ratio chlorine: hydrogen was carried out with reasonable ease, it seemed … applied for the purpose of determining the ratio between hydrogen and bromine. The method, which was employed by Noyes …

M 2 (m-dobdc) (M=Mg,Mn, Fe, Co, Ni) Metal-Organic Frameworks Exhibiting Increased Charge Density and Enhanced H 2 Binding at the Open Metal Sites

August 14, 2014
Author(s)
Matthew T. Kapelewski, Stephen J. Geier, Matthew Ross Hudson, David Stuck, Jarad A. Mason, Jocienne N. Nelson, Zeric Z. Hulvey, Elizabeth Gilmour, Stephen A. FitzGerald, Martin Head-Gordon, Craig Brown, Jeffrey R. Long
… materials that are being heavily investigated for their hydrogen storage properties due to their high internal … strong interactions with adsorbed gases. Increasing they hydrogen binding enthalpy of such materials is necessary for them to be viable candidates for use as hydrogen storage media in most applications. A structural …

Experimental Uhrig Dynamical Decoupling Using Trapped Ions

June 25, 2009
Author(s)
Michael J. Biercuk, Hermann Uys, Aaron Vandevender, Nobuyasu Shiga, Wayne M. Itano, John J. Bollinger
… Our qubit system consists of a crystalline array of 9 Be + ions confined in a Penning trap. We use an electron-spin-flip … Experimental Uhrig Dynamical Decoupling Using Trapped Ions …

Investigation of N 2 Plasma Effects on the Depth Profile of Hydrogen Silsesquioxane Thin Films Using High Resolution Specular X-Ray Reflectivity

October 16, 2008
Author(s)
Hae-Jeong Lee, Eric K. Lin, J K. Lan, Y L. Cheng, H C. Liou, Wen-Li Wu, Y L. Wang, M S. Feng, C G. Chao
… N2 plasma effects on the density depth profile of hydrogen silsesquioxane (HSQ) thin films. The SXR data … density profile, exposure time, hydrogen silsesquioxane, low-k dielectric, plasma effect, … Investigation of N 2 Plasma Effects on the Depth Profile of Hydrogen Silsesquioxane Thin Films Using High Resolution …

Measurements of 25 Mg + and 27 Al + magnetic constants for improved ion clock accuracy

July 15, 2019
Author(s)
Samuel M. Brewer, Jwo-Sy Chen, Aaron M. Hankin, Ethan Clements, Chin-wen Chou, Kyle Beloy, Will McGrew, Xiaogang Zhang, Robert J. Fasano, Daniele Nicolodi, Holly Leopardi, Tara Fortier, Scott Diddams, Andrew Ludlow, David J. Wineland, David Leibrandt, David Hume
… 358(60) X 10-5 and the nuclear g-factor for the free 25Mg+ ion gI' = 1.861 957 83(28) X 10-4. … of 25 Mg + and 27 Al + magnetic constants for improved ion clock accuracy …

High Energy X-Ray Diffraction and Small-Angle Scattering Measurements of Hydrogen Fatigue Damage in AISI 4130 Steel

June 4, 2022
Author(s)
Matthew Connolly, May Ling Martin, Peter Bradley, Damian Lauria, Andrew Slifka, Jun-Sang Park, Robert Amaro, Jonathan Almer
… are critical for repurposing existing pipelines for hydrogen transmission as well as for developing novel steels … which are minimally susceptible to lifetime degradation by hydrogen. Ultimately, lifetime prediction models assess the … when materials are in inert environments compared to in hydrogen environments. For example, in the three leading …

Hydrogen-Deuterium Exchange Mass Spectrometry (HDX-MS) Centroid Data Measured between 3.6 degC and 25.4 degC for the Fab Fragment of NISTmAb

May 2, 2019
Author(s)
Jeffrey W. Hudgens, Elyssia S. Gallagher, Ioannis L. Karageorgos, Kyle W. Anderson, Richard Y. Huang, Guodong Chen, George M. Bou-Assaf, Alfonso Espada, Michael J. Chalmers, Edu Harguindey, Hui-Min Zhang, Benjamin T. Walters, Jennifer Zhang, John Venable, Caitlin Steckler, In Hee Park, Ansgar Brock, Xiaojun Lu, Ratnesh Pandey, Arun Chandramohan, Ganesh Srinivasan Anand, Sasidhar N. Nirudodhi, Justin Sperry, Jason C. Rouse, James A. Carroll, Kasper D. Rand, Ulrike Leurs, David D. Weis, Mohammed A. Al-Naqshabandi, Daniel Deredge, Patrick Wintrode, Malvina Papanastasiou, John D. Lambris, Sheng Li, Sarah Urata
… 5K8A) reference material, as measured by the bottom-up hydrogen-deuterium exchange mass spectrometry (HDX-MS) … centroid, hydrogen-deuterium exchange, interlaboratory comparison, mass … Hydrogen-Deuterium Exchange Mass Spectrometry (HDX-MS) …

Automated SIMS for Determining Isotopic Distributions in Particle Polutations

February 1, 1998
Author(s)
David S. Simons, John G. Gillen, Cynthia J. Zeissler, R H. Fleming, P J. McNitt
… throughput is achieved by using a commercial secondary ion microscope to collect direct ion images simultaneously from multiple particles within the … image pairs are recorded by spatially resolved single ion counting with a resistive anode encoder (RAE) image …
Displaying 701 - 725 of 3841
Was this page helpful?