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https://www.readbyqxmd.com/read/29164921/gait-speed-is-not-magic-but-is-prognostically-important-in-older-patients
#1
Urs Granacher, Heinz Völler
No abstract text is available yet for this article.
January 1, 2017: European Journal of Preventive Cardiology
https://www.readbyqxmd.com/read/29164764/influence-of-levulinic-acid-hydrogenation-on-aluminum-coordination-in-zeolite-supported-ruthenium-catalysts-a%C3%A2-27-al-3qmas-nuclear-magnetic-resonance-study
#2
Wenhao Luo, Ernst R H van Eck, Pieter C A Bruijnincx, Bert M Weckhuysen
The influence of a highly oxygenated, polar protic reaction medium, that is, levulinic acid in 2-ethylhexanoic acid, on the dealumination of two zeolite-supported ruthenium catalysts, namely Ru/H-β and Ru/H-ZSM-5, has been investigated by (27) Al triple-quantum magic-angle spinning nuclear magnetic resonance spectroscopy (3QMAS NMR). Upon use of these catalysts in the hydrogenation of levulinic acid, the heterogeneity in aluminum speciation is found to increase for both Ru/H-ZSM-5 and Ru/H-β. For Ru/H-ZSM-5, the symmetric, tetrahedral framework aluminum species (FAL) were found to be mainly converted into distorted tetrahedral FAL species, with limited loss of aluminum to the solution by leaching...
November 22, 2017: Chemphyschem: a European Journal of Chemical Physics and Physical Chemistry
https://www.readbyqxmd.com/read/29161649/magic-angle-spinning-nmr-below-6%C3%A2-k-with-a-computational-fluid-dynamics-analysis-of-fluid-flow-and-temperature-gradients
#3
Erika L Sesti, Nicholas Alaniva, Peter W Rand, Eric J Choi, Brice J Albert, Edward P Saliba, Faith J Scott, Alexander B Barnes
We report magic angle spinning (MAS) up to 8.5 kHz with a sample temperature below 6 K using liquid helium as a variable temperature fluid. Cross polarization (13)C NMR spectra exhibit exquisite sensitivity with a single transient. Remarkably, (1)H saturation recovery experiments show a (1)H T1 of 21 s with MAS below 6 K in the presence of trityl radicals in a glassy matrix. Leveraging the thermal spin polarization available at 4.2 K versus 298 K should result in 71 times higher signal intensity...
November 11, 2017: Journal of Magnetic Resonance
https://www.readbyqxmd.com/read/29159504/there-is-no-magic-in-speaker-policies-creating-gender-equality-at-brain-stimulation-conferences-editorial-ii-to-the-supplement-from-the-2nd-european-conference-on-brain-stimulation-in-psychiatry
#4
EDITORIAL
Anna-Katharine Brem, Soili M Lehto, Daniel Keeser, Frank Padberg
No abstract text is available yet for this article.
November 20, 2017: European Archives of Psychiatry and Clinical Neuroscience
https://www.readbyqxmd.com/read/29156654/a-dual-band-frequency-reconfigurable-origami-magic-cube-antenna-for-wireless-sensor-network-applications
#5
Syed Imran Hussain Shah, Sungjoon Lim
In this paper, a novel dual band frequency reconfigurable antenna using an origami magic cube is proposed for wireless sensor network (WSN) applications. The proposed origami antenna consists of a meandered monopole folded onto three sides of the magic cube. A microstrip open-ended stub is loaded on the meandered monopole. The proposed origami magic cube can be mechanically folded and unfolded. The proposed antenna operates at 1.57 GHZ and 2.4 GHz in the folded state. In the unfolded state, the proposed antenna operates at 900 MHz and 2...
November 20, 2017: Sensors
https://www.readbyqxmd.com/read/29154037/sex-and-age-specific-modulation-of-brain-gaba-levels-in-a-mouse-model-of-alzheimer-s-disease
#6
Upasana Roy, Lara Stute, Corinna Höfling, Maike Hartlage-Rübsamen, Jörg Matysik, Steffen Roβner, A Alia
Age and sex are risk factors of Alzheimer's disease (AD). Among the neurotransmitter systems, gamma-aminobutyric acid (GABA) has been implicated in AD pathogenesis but the relevance of sex-specific GABAergic dysfunction during AD progression remains unknown. In the present study, we utilized state-of-the-art high-resolution magic angle spinning nuclear magnetic resonance to systematically monitor the brain region-, age-, and sex-specific modulation of GABA levels in wild-type and Tg2576 mice with amyloid pathology...
October 26, 2017: Neurobiology of Aging
https://www.readbyqxmd.com/read/29151205/filamentous-bacteriophage-viruses-preparation-magic-angle-spinning-solid-state-nmr-experiments-and-structure-determination
#7
Omry Morag, Nikolaos G Sgourakis, Gili Abramov, Amir Goldbourt
Filamentous bacteriophages are elongated semi-flexible viruses that infect bacteria. They consist of a circular single-stranded DNA (ssDNA) wrapped by a capsid consisting of thousands of copies of a major coat protein subunit. Given the increasing number of discovered phages and the existence of only a handful of structures, the development of methods for phage structure determination is valuable for biophysics and structural virology. In recent years, we developed and applied techniques to elucidate the 3D atomic-resolution structures of intact bacteriophages using experimental magic-angle spinning (MAS) solid-state NMR data...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29151203/experimental-aspects-of-polarization-optimized-experiments-poe-for-magic-angle-spinning-solid-state-nmr-of-microcrystalline-and-membrane-bound-proteins
#8
T Gopinath, Gianluigi Veglia
Conventional NMR pulse sequences record one spectrum per experiment, while spending most of the time waiting for the spin system to return to the equilibrium. As a result, a full set of multidimensional NMR experiments for biological macromolecules may take up to several months to complete. Here, we present a practical guide for setting up a new class of MAS solid-state NMR experiments (POE or polarization optimized experiments) that enable the simultaneous acquisition of multiple spectra of proteins, accelerating data acquisition...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29151202/nmr-of-macromolecular-assemblies-and-machines-at-1-ghz-and-beyond-new-transformative-opportunities-for-molecular-structural-biology
#9
Caitlin M Quinn, Mingzhang Wang, Tatyana Polenova
As a result of profound gains in sensitivity and resolution afforded by ultrahigh magnetic fields, transformative applications in the fields of structural biology and materials science are being realized. The development of dual low temperature superconducting (LTS)/high-temperature superconducting (HTS) magnets has enabled the achievement of magnetic fields above 1 GHz (23.5 T), which will open doors to an unprecedented new range of applications. In this contribution, we discuss the promise of ultrahigh field magnetic resonance...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29150594/mating-design-and-genetic-structure-of-a-multi-parent-advanced-generation-inter-cross-magic-population-of-sorghum-sorghum-bicolor-l-moench
#10
Patrick O Ongom, Gebisa Ejeta
MAGIC populations are powerful next generation mapping resources. We describe here the mating design and structure of the first MAGIC population in sorghum and test its utility for mapping. The population was developed by intercrossing 19 diverse founder lines, through a series of paired crosses with a genetic male sterile source, followed by 10 generations of random mating. At the final stage of random mating, one thousand random fertile plants in the population were identified and subjected to six generations of selfing to produce 1000 immortal MAGIC inbred lines...
November 17, 2017: G3: Genes—Genomes—Genetics
https://www.readbyqxmd.com/read/29150197/preface-ultrafast-magic-angle-spinning-nmr
#11
EDITORIAL
Marek J Potrzebowski
No abstract text is available yet for this article.
October 2017: Solid State Nuclear Magnetic Resonance
https://www.readbyqxmd.com/read/29149787/the-role-of-the-home-environment-in-dementia-care-and-support-systematic-review-of-qualitative-research
#12
Dia Soilemezi, Amy Drahota, John Crossland, Rebecca Stores
Background The domestic home is the preferred site for care provision for people with dementia and their families, therefore creating a dementia and caring friendly home environment is crucial. This systematic review synthesised qualitative studies to explore the role of the home environment and identify potential barriers and facilitators in home dementia care and support to inform future practice and research. Methods A systematic search in 12 databases identified international qualitative literature on perceptions and experiences of community-dwelling people with dementia, family and formal carers regarding the role of the home environment and ways to tackle daily challenges...
January 1, 2017: Dementia
https://www.readbyqxmd.com/read/29149466/microsecond-timescale-protein-dynamics-a-combined-solid-state-nmr-approach
#13
Petra Rovó, Rasmus Linser
Conformational exchange in proteins is a major determinant in protein functionality. In particular, the μs-ms timescale is associated with enzymatic activity and interactions between biological molecules. We show here that a comprehensive data set of R1ρ relaxation dispersion profiles employing multiple effective fields and tilt angles can be easily obtained in perdeuterated, partly back-exchanged proteins at fast magic-angle spinning and further complemented with chemical-exchange saturation transfer NMR experiments...
November 17, 2017: Chemphyschem: a European Journal of Chemical Physics and Physical Chemistry
https://www.readbyqxmd.com/read/29148785/rapid-quantitative-measurements-of-paramagnetic-relaxation-enhancements-in-cu-ii-tagged-proteins-by-proton-detected-solid-state-nmr-spectroscopy
#14
Dwaipayan Mukhopadhyay, Philippe S Nadaud, Matthew D Shannon, Christopher P Jaroniec
We demonstrate rapid quantitative measurements of site-resolved paramagnetic relaxation enhancements (PREs), which are a source of valuable structural restraints corresponding to electron-nucleus distances in the ~10-20 Å regime, in solid-state nuclear magnetic resonance (NMR) spectra of proteins containing covalent Cu(2+)-binding tags. Specifically, using protein GB1 K28C-EDTA-Cu(2+) mutant as a model, we show the determination of backbone amide (15)N longitudinal and (1)H transverse PREs within a few hours of experiment time based on proton-detected 2D or 3D correlation spectra recorded with magic-angle spinning frequencies ≥ ~60 kHz for samples containing ~10-50 nanomoles of (2)H,(13)C,(15)N-labeled protein back-exchanged in H2O...
November 17, 2017: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/29145080/comparing-the-efficacy-of-solid-and-magic-echo-refocusing-sequences-applications-to-1-h-nmr-echo-spectroscopy-of-shale-rock
#15
Gregory S Boutis, Ravinath Kausik
Quantitative evaluation of the solid and viscous components of unconventional shale rock, namely kerogen and bitumen, is important for understanding reservoir quality. Short transverse coherence times, due to strong (1)H-(1)H dipolar interactions, motivates the application of solid state refocusing pulse sequences that allow for investigating components of the free-induction decay that are otherwise obscured by instrumental effects such as probe ringdown. This work reports on static, wide-line (1)H spectroscopy of shale rock and their extracted components, which include kerogen and bitumen, by the application of solid echo and magic echo pulse sequences...
November 3, 2017: Solid State Nuclear Magnetic Resonance
https://www.readbyqxmd.com/read/29141439/double-cross-polarization-for-the-indirect-detection-of-nitrogen-14-nuclei-in-magic-angle-spinning-nmr-spectroscopy
#16
Diego Carnevale, Xiao Ji, Geoffrey Bodenhausen
Nitrogen-14 NMR spectra at fast magic-angle spinning rates can be acquired indirectly by means of two-dimensional techniques based on double cross polarization transfer (1)H → (14)N →(1)H. Experimental evidence is given for polycrystalline samples of glycine, l-histidine, and the dipeptide Ala-Gly. Either one-bond or long-range correlations can be favored by choosing the length of the cross polarization contact pulses. Longer contact pulses allow the detection of unprotonated nitrogen sites. In contrast to earlier methods that exploited second-order quadrupolar/dipolar cross-terms, cross polarization operates in the manner of the method of Hartmann and Hahn, even for (14)N quadrupolar couplings up to 4 MHz...
November 14, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/29140470/database-resources-of-the-national-center-for-biotechnology-information
#17
(no author information available yet)
The National Center for Biotechnology Information (NCBI) provides a large suite of online resources for biological information and data, including the GenBank® nucleic acid sequence database and the PubMed database of citations and abstracts for published life science journals. The Entrez system provides search and retrieval operations for most of these data from 39 distinct databases. The E-utilities serve as the programming interface for the Entrez system. Augmenting many of the Web applications are custom implementations of the BLAST program optimized to search specialized data sets...
November 13, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/29140279/free-standing-and-self-crosslinkable-hybrid-films-by-core-shell-particle-design-and-processing
#18
Steffen Vowinkel, Stephen Paul, Torsten Gutmann, Markus Gallei
The utilization and preparation of functional hybrid films for optical sensing applications and membranes is of utmost importance. In this work, we report the convenient and scalable preparation of self-crosslinking particle-based films derived by directed self-assembly of alkoxysilane-based cross-linkers as part of a core-shell particle architecture. The synthesis of well-designed monodisperse core-shell particles by emulsion polymerization is the basic prerequisite for subsequent particle processing via the melt-shear organization technique...
November 15, 2017: Nanomaterials
https://www.readbyqxmd.com/read/29139369/oral-mucocoele-the-magic-of-sclerotherapy
#19
Anju George, Eswari Loganathan
No abstract text is available yet for this article.
2017: Skinmed
https://www.readbyqxmd.com/read/29139027/-magic-bullets-at-the-center-stage-of-immune-therapy-a-special-issue-on-therapeutic-antibodies
#20
EDITORIAL
Zhiqiang An
No abstract text is available yet for this article.
November 14, 2017: Protein & Cell
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