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Displaying 676 - 700 of 3757

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 …

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) …

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 …

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 …

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 …

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 …

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 …

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 …

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) …

Formation of Solid Electrolyte Interface on Cycled Lithium-Ion Battery Cathodes: Soft X-ray Absorption Study

May 3, 2002
Author(s)
Mahalingam Balasubramanian, James McBreen, Xiao-Qing Yang, H S. Lee, A R. Moodenbaugh, Daniel A. Fischer, Ziwen Fu, D Abraham
… Lithium-ion batteries are promising candidates for hybrid electric … to study the nature of the SEI layers in lithium-ion battery cathodes. … cathode, hybrid electric vehicles (HEV), lithium-ion batteries, solik electrolyte intervace (SEI) … Formation of Solid Electrolyte Interface on Cycled Lithium-Ion Battery Cathodes: Soft X-ray Absorption Study …

Low-Temperature Kinetics of the Reaction of the OH Radical With Hydrogen Peroxide

October 12, 2021
Author(s)
A B. Vakhtin, D C. McCabe, A R. Ravishankara, S R. Leone
… The kinetics of the reaction of the OH radical with hydrogen peroxide. H 2 O 2 are studied over a temperature … supersonic expansion of nitrogen with admixed H 2 O 2 . Hydrogen peroxide serves as both the OH radical photolytic … high temperatures) to a mechanism involving formation of a hydrogen-bonded complex (at low temperatures). Atmospheric …

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 …

Air-Stable Cu(I) Metal-Organic Framework for Hydrogen Storage

September 1, 2023
Author(s)
Debabrata Sengupta, Patrick Melix, Saptasree Bose, Joshua Duncan, Xingjie Wang, Mohammad Mian, Kent Kirlikovali, Faramarz Joodaki, Timur Islamoglu, Taner N. Yildirim, Randall Snurr, Omar Farha
… contain open metal sites have the potential for storing hydrogen (H2) at ambient temperatures. In particular, … demonstrate very high isosteric heats of adsorption for hydrogen relative to other reported MOFs with open metal … isosteric heats of adsorption (32 kJ/mol) with good hydrogen storage capability under ambient conditions (10.4 …

Achieving 0.2 % Relative Expanded Uncertainty in Ion Chromatography Analysis using a High-Performance Methodology

April 12, 2011
Author(s)
Ryan G. Brennan, Therese A. Butler, Michael R. Winchester
… spectrometry (ICP-OES) has been successfully translated to ion chromatography (IC) to enable analyses with extremely low … high-performance (HP), ion chromatography (IC), low uncertainty, anion SRM … Achieving 0.2 % Relative Expanded Uncertainty in Ion Chromatography Analysis using a High-Performance …

Modification to a testing assembly to enable strain-life measurements in pressurized hydrogen gas

August 25, 2023
Author(s)
Peter Bradley, May Ling Martin, Matthew Connolly, Robert Amaro, Damian Lauria, Andrew Slifka
… material lifetime and damage response. Strain-life data in hydrogen gas environments is missing in the literature and could provide valuable insights into hydrogen effects on the mechanical response of metals such as steels. We adapted existing hydrogen-gas-environment mechanical-testing equipment, which …

Reduction of Hydrogen Cyanide Concentrations and Acute Inhalation Toxicity From Flexible Polyurethane Foam Combustion Products by the Addition of Copper Compounds. Part 4. Effects of Combustion Conditions and Scaling on the Generation of Hydrogen cyanide

December 1, 1992
Author(s)
Barbara C. Levin, E Braun, M Paabo, Richard H. Harris Jr., Magdalena Navarro
… of cuprous oxide (Cu2O) in reducing the concentrations of hydrogen cyanide (HCN) from flexible polyurethane foams (FPU) … hydrogen cyanide, acute toxicity, combustion products, … Reduction of Hydrogen Cyanide Concentrations and Acute Inhalation Toxicity … of Combustion Conditions and Scaling on the Generation of Hydrogen cyanide …
Displaying 676 - 700 of 3757
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