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Search Publications

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Displaying 351 - 375 of 910

Transverse Lipid Organization Dictates Bending Fluctuations in Model Plasma Membranes

January 21, 2020
Author(s)
Brett W. Rickeard, Michael H. Nguyen, Mitchell DiPasquale, Caesar G. Yip, Hamilton Baker, Frederick A. Heberle, Xiaobing Zuo, Elizabeth Kelley, Michihiro Nagao, Drew Marquardt
Bending fluctuation is one of the most important dynamic modes of lipid membranes. These fluctuations play a vital role in many biological processes, most notoriously, contributing to the regulation of membrane protein activity. We investigated the bending

Structural and Reorientational Dynamics of Tetrahydroborate (BH 4 -) and Tetrahydrofuran (THF) in a Mg(BH 4 ) 2 &#82263THF Adduct: Neutron-Scattering Characterization

January 7, 2020
Author(s)
Mirjana NMN Dimitrievska, Marina Chong, Mark E. Bowden, Hui Wu, Wei Zhou, Iffat Nayyar, Bojana Ginovska, Thomas Gennett, Tom Autrey, Craig M. Jensen, Terrence J. Udovic
Metal borohydrides are considered as promising materials for hydrogen storage applications due to their high volumetric and gravimetric hydrogen densities. Recently, different solvents have been complexed with Mg(BH 4) 2 in efforts to improve its

6 LiF:ZnS(Ag) Neutron Detector Performance Optimized using Waveform Recordings and ROC Curves

January 1, 2020
Author(s)
Kevin N. Pritchard, A. Osovizky, Jeffrey B. Ziegler, Louis E. Binkley, Peter NMN Tsai, Nancy Hadad, M. Jackson, C. Hurlbut, George M. Baltic, Charles Majkrzak, Nicholas C. Maliszewskyj
We used data analysis and pattern recognition techniques to optimize the neutron sensitivity and selectivity of an ultrathin 6LiF:ZnS(Ag) scintillator based neutron detector paired with a Silicon Photomultiplier (SiPM). We recorded waveforms from the

Characterization of an Extensive Interface on Vitronectin for Binding to Plasminogen Activator Inhibitor-1: Adoption of Structure in an Intrinsically Disordered Region

December 24, 2019
Author(s)
Letitia O. Puster, Christopher B. Stanley, Vladmir N. Uversky, Joseph E. Curtis, Susan T. Krueger, Yuzhuo Chu, Cynthia B. Peterson
Small-angle neutron scattering (SANS) measurements were used to characterize vitronectin, a protein found in human plasma and tissues that functions in regulating cell adhesion and migration, as well as proteolytic cascades that affect blood coagulation

Application of INAA methods for KRISS infant forumla CRM analysis: Standardization of INAA at KRISS

November 15, 2019
Author(s)
Hana Cho, Kishore B. Dasari, Radojko Ja?imovi?, Rolf L. Zeisler, Nicholas Sharp, Sun-Ha Kim, Gwang Min Sun, Yong-Hyeon Yim
We have established an instrumental neutron activation analysis (INAA) method, including k0- based INAA, at the Korea Research Institute of Standards and Science (KRISS) for the certification of reference materials. As part of establishing INAA

Elusive Valence Transition in Mixed-Valence Sesquioxide Cs 4 O 6

November 4, 2019
Author(s)
Ross H. Colman, H. Esma Okur, Winfried Kockelmann, Craig Brown, Annette Sans, Claudia Felser, Martin Jansen, Kosmas Prassides
Cs 4O 6 is a mixed valence molecular oxide with a cubic structure, comprising valency-delocalized O 2 4/3- units and with properties highly sensitive to cooling protocols. Here we use neutron powder diffraction to authenticate that, while upon deep

Realization of Interlayer Ferromagnetic Interaction in MnSb 2 Te 4 toward the Magnetic Weyl Semimetal State

November 4, 2019
Author(s)
Taito Murakami, Yusuke Nambu, Takashi Koretsune, Gu Xiangyu, Takafumi Yamamoto, Craig Brown, Hiroshi Kageyama
Magnetism in the newly synthesized topological magnet Sb 2MnTe 4 is examined. Magnetic susceptibility, specific heat, and neutron diffraction measurements reveal a ferrimagnetic transition below 25 K, in contradiction to previous theoretical calculations

Recent trends in crystallography a current IUCr journals perspective

November 1, 2019
Author(s)
Andrew J. Allen
The International Union of Crystallography (IUCr) publishes papers in nine scientific journals, including its high-impact, cross-cutting open-access journal, IUCrJ, plus its data publication, IUCrData. Where are these papers cited? To what degree are

Structure and Dynamics of Spherical and Rodlike Alkyl Ethoxylate Surfactant Micelles Investigated using NMR Relaxation and Atomistic Molecular Dynamics Simulations

October 29, 2019
Author(s)
Allison Talley Edwards, Abdolreza Javidialesaadi, Kathleen Weigandt, George Stan, Charles D. Eads
Predicting and controlling the properties of amphiphile aggregate mixtures requires understanding the arrangements and dynamics of the constituent molecules. To explore these topics, we study molecular arrangements and dynamics in alkyl ethoxylate nonionic

Clusters of Nanoscale Liposomes Modulate the Release of Encapsulated Species and Mimic the Compartmentalization Intrinsic in Cell Structures

October 23, 2019
Author(s)
Igor Kevin Mkam Tsengam, Marzhana Omarova, Lauren Shepherd, Nicholas Sandoval, Jibao He, Elizabeth Kelley, Vijay John
We report the ability to place a high concentration of liposomes in a confined volume as a multicompartment cluster that mimics biological cells and allows for the modulation of release of encapsulated species. The formation of these coated

Generation and Detection of Spin-Orbit Coupled Neutron Beams

October 8, 2019
Author(s)
Dusan Sarenac, Connor Kapahi, Wangchun Chen, Charles W. Clark, David G. Cory, Michael G. Huber, Ivar Taminiau, Kirill Zhernenkov, Dmitry A. Pushin
Spin-orbit coupling of light has come to the fore in nano-optics and plasmonics, and is a key ingredient of topological photonics and chiral quantum optics. We demonstrate a basic tool for incorporating analogous effects into neutron optics: the generation

Field-Tunable Quantum Disordered Ground State in the Triangular-Lattice Antiferromagnet NaYbO 2

October 1, 2019
Author(s)
Mitchell M. Bordelon, Eric Kenney, Chunxiao Liu, Tom Hogan, Lorenzo Posthuma, Marzieh Kavand, Yuangqi Lyu, Mark Sherwin, Nicholas Butch, Craig Brown, M. J. Graf, Leon Balents, Stephen D. Wilson
One of the simplest routes to pursuing magnets with strong quantum fluctuations that quench conventional order is via decorating a triangular lattice with antiferromagnetically coupled S=1/2 moments. As disorder and anisotropies inherent in materials

ROTDIF-web and ALTENS: GenApp-based Science Gateways for Biomolecular Nuclear Magnetic Resonance (NMR) Data Analysis and Structure Modeling

September 23, 2019
Author(s)
Yuexi Chen, Cheol Jeong, Alexey Savelyev, Susan T. Krueger, Joseph E. Curtis, Emre H. Brookes, David Fushman
Proteins and nucleic acids participate in essentially every biochemical process in living organisms, and the elucidation of their structure and motions is essential for our understanding how these molecular machines perform their function. Nuclear Magnetic

Tailoring Biomimetic Phosphorylcholine-Containing Block Copolymers as Membrane-Targeting Cellular Rescue Agents

September 9, 2019
Author(s)
Jia-Yu Wang, Wei Chen, Michihiro Nagao, Phullara Shelat, Brenton A. G. Hammer, Gregory T. Tietjen, Kathleen Cao, J. Michael Henderson, Lilin He, Binhua Lin, Bulent Akgun, Mati Meron, Shuo Qian, Sarah Ward, Jeremy D. Marks, Todd Emrick, Ka Yee C. Lee
Some synthetic polymers have been found capable of rescuing injured cells from death by targeting cell membranes. However, general principles for designing synthetic polymers to ensure strong, but non-disruptive cell membrane targeting unknown. Here, we

Accessing New Charge-Transfer Complexes by Mechanochemistry: A Tetrathiafulvalene Chloranilic Acid Polymorph Containing Segregated Tetrathiafulvalene Stacks

September 4, 2019
Author(s)
Jeffrey Jones, Vinh Ta Phuoc, Leire del Campo, Nestor E. Massa, Craig Brown, Silvina Pagola
Two polymorphs of tetrathiafulvalene chloranilic acid (ITF-CAH 2) have been synthesized by mechanochemistry. The previously known "ionic" polymorph (form I), was prepared by liquid assisted grinding (LAG) using various highly polar solvents; as well as
Displaying 351 - 375 of 910
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