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Displaying 76 - 100 of 806

Polyoxocationic Antimony Oxide Cluster with Acidic Protons

June 17, 2022
Author(s)
Yuki Watanabe, Kim Hyeon-Deuk, Takafumi Yamamoto, Masayoshi Yabuuchi, Olesia M. Karakulina, Yasuto Noda, Takuya Kurihara, I-Ya Chang, Masanobu Higashi, Osamu Tomita, Cedric Tassel, Daichi Kato, Jingxin Xia, Tatsuhiko Goto, Craig Brown, Yuto Shimoyama, Naoki Ogiwara, Joke Hadermann, Artem M. Abakumov, Sayaka Uchida, Ryu Abe, Hiroshi Kageyama
The success and continued expansion of research in polyoxometalates (POMs) owe largely to their structural richness and wide range of functions. However, while most POM clusters known to date are negatively charged, there is only a handful of cationic POMs

Probing the Link between Pancratistatin and Mitochondrial Apoptosis through Changes in the Membrane Dynamics on the Nanoscale

June 6, 2022
Author(s)
Stuart R. Castillo, Brett W. Rickeard, Mitchell DiPasquale, Michael H. Nguyen, Aislyn Lewis-Laurent, Milka Doktorova, Batuhan Kav, Markus S. Miettinen, Michihiro Nagao, Elizabeth Kelley, Drew Marquardt
Pancratistatin (PST) is a natural antiviral alkaloid that has demonstrated specificity towards cancerous cells and explicitly targets the mitochondria. PST initiates apoptosis while leaving healthy, noncancerous cells unscathed. However, the manner by

Structures and Dynamics of Anionic Lipoprotein Nanodiscs

April 21, 2022
Author(s)
D. Sweeney, Susan T. Krueger, Kakali Sen, John Hackett
Nanolipoprotein particles known as nanodiscs (NDs) have emerged as versatile and powerful tools for the stabilization of mem-brane proteins permitting a plethora of structural and biophysical studies. Part of their allure is their flexibility to

Q-Dependent Collective Relaxation Dynamics of Glass-Forming Liquid Ca 0.4 K 0.6 (NO 3 ) 1.4 Investigated by Wide-Angle Neutron Spin-Echo

April 19, 2022
Author(s)
Peng Luo, Yanqin Zhai, Peter Falus, Victoria Garcia Sakai, Monika Hartl, Maiko Kofu, Kenji Nakajima, Antonio Faraone, Y. Z
Employing high-intensity wide-angle neutron spin-echo spectroscopy, we measured the coherent intermediate scattering function of the prototypical ionic glass former Ca 0.4K 0.6(NO 3) 1.4 in the equilibrium and supercooled liquid state from 383 to 519 K

Transformation of Lipid Vesicles into Micelles by Adding Nonionic Surfactants: Elucidating the Structural Pathway and the Intermediate Structures

March 24, 2022
Author(s)
Igor K. Mkam Tsengam, Marzhana Omarova, Elizabeth Kelley, Alon V. McCormick, Geoffrey D. Bothun, Srinivasa R. Raghavan, Vijay T. John
The phospholipid lecithin (L) and the nonionic surfactant Tween 80 (T) are used together in various contexts, including in drug delivery and oil spill remediation. There is hence a need to elucidate the nanostructures in L/T mixtures, which is the focus of

Head on Comparison of Self- and Nano-Assemblies of Gamma Peptide Nucleic Acid Amphiphiles

February 9, 2022
Author(s)
Shipra Malik, Vikas Kumar, Chung-Hao Liu, Kuo-Chih Shih, Susan T. Krueger, Mu-Ping Neih, Raman Bahal
Peptide nucleic acids (PNAs) are nucleic acid analogs with superior hybridization properties and enzymatic stability than deoxyribonucleic acid (DNA). In addition to gene targeting applications, PNAs have garnered significant attention as bio-polymer due

Low-Background Neutron Reflectometry from Solid/Liquid Interfaces

February 1, 2022
Author(s)
David Hoogerheide, Joseph Dura, Brian B. Maranville, Charles F. Majkrzak
Liquid cells are an increasingly common sample environment for neutron reflectometry experiments and are critical for measuring the properties of materials at solid/liquid interfaces. Background scattering determines the maximum useful scattering vector

Neutron vibrational spectroscopic evidence for short H???H contacts in the RNiInH1.4; 1.6 (R = Ce, La) metal hydride

February 1, 2022
Author(s)
Ryan Klein, Rafael Balderas-Xicohtencatl, Jan Petter Maehlen, Terrence J. Udovic, Craig Brown, Robert Delaplane, Yongqiang Cheng, Roman Denys, Anibal Ramirez Cuesta, Volodymyr Yartys
Intermetallic metal hydrides are critical materials for hydrogen storage applications, however, metal hydrides with greater storage capacities are still needed. Within metal hydrides, the volumetric storage capacities are limited by the number of hydrogen

Styrene-Maleic Acid Copolymer Nanodiscs to Determine the Shape of Membrane Proteins

January 28, 2022
Author(s)
Cheol Jeong, Ryan Franklin, Karen J. Edler, Kenno Vanommeslaeghe, Joseph E. Curtis
Lipid nanodiscs can be used to solubilize functional membrane proteins (MPs) in nativelike environments. Thus, they are promising reagents that have been proven useful to characterize MPs. Both protein and non-protein molecular belts have shown promise to

Dynamics of Molecular Associates in Methanol/Water Mixtures

January 26, 2022
Author(s)
Yanqin Zhai, Peng Luo, Jackson Waller, Jeffrey L. Self, Leland Harriger, Y. Z., Antonio Faraone
The dynamics of molecular associates in methanol/water mixtures was investigated using quasielastic neutron scattering. By measuring the signal from four methanol/water samples differing only by their isotopic composition, the relative motion of the water

Predicting the plateau modulus from molecular parameters of conjugated polymers

January 18, 2022
Author(s)
Abigail Fenton, Renxuan Xie, Melissa Aplan, Youngmin Lee, Michael Gill, Ryan Fair, Fabian Kempe, Michael Sommer, Chad R. Snyder, Enrique Gomez, Ralph Colby
The relationship between Kuhn length lk, Kuhn monomer volume v0, and plateau modulus GN0 , initially proposed by Graessley and Edwards for flexible polymers, and extended by Everaers, has a large gap in experimental data between the flexible and stiff

Considerations in applying neutron depth profiling to Li-ion battery research

December 14, 2021
Author(s)
Daniel Lyons, Jamie Weaver, Anne Co
Li distribution within micron-scale battery electrode materials is quantified with neutron depth profiling (NDP). This method allows determination of intra- and inter-electrode parameters such as lithiation efficiency, electrode morphology change and Li

The PROSPECT Experiment

December 14, 2021
Author(s)
Hans Pieter Mumm
The Precision Reactor Oscillation and Spectrum Experiment, PROSPECT, is designed to both perform a reactor-model independent search for eV-scale sterile neutrino oscillations at meter-long baselines and to make a precise measurement of the antineutrino
Displaying 76 - 100 of 806