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Neutron research

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Displaying 526 - 550 of 1582

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

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
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