Results 21 to 30 of about 395,400 (125)

Conformational dynamics in GPCR signaling by NMR

Magnetic Resonance Letters, 2022
G-protein-coupled receptors (GPCRs) mediate a wide range of cellular responses to various ligands or stimuli, and are the most important drug targets associated with human diseases.
Yunfei Hu, Changwen Jin
doaj  

Spin polarization contrast observed in GaAs by force-detected nuclear magnetic resonance [PDF]

Appl. Phys. Lett. 80, 1794 (2002), 2002
We applied the recently developed technique of force-detected nuclear magnetic resonance (NMR) to observe 71Ga, 69Ga, and 75As in GaAs. The nuclear spin-lattice relaxation time is 21$\pm$5 min for 69Ga at $\sim 5$ K and 4.6 Tesla. We have exploited this long relaxation time to first create and then observe spatially varying nuclear spin polarization ...
arxiv   +1 more source

Assessing Lumbar Plexus and Sciatic Nerve Damage in Relapsing-Remitting Multiple Sclerosis Using Magnetisation Transfer Ratio

Frontiers in Neurology, 2021
Background: Multiple sclerosis (MS) has traditionally been regarded as a disease confined to the central nervous system (CNS). However, neuropathological, electrophysiological, and imaging studies have demonstrated that the peripheral nervous system (PNS)
Ratthaporn Boonsuth, Rebecca S. Samson, Carmen Tur, Carmen Tur, Marco Battiston, Francesco Grussu, Francesco Grussu, Francesco Grussu, Torben Schneider, Masami Yoneyama, Ferran Prados, Ferran Prados, Ferran Prados, Antrea Ttofalla, Sara Collorone, Rosa Cortese, Olga Ciccarelli, Claudia A. M. Gandini Wheeler-Kingshott, Claudia A. M. Gandini Wheeler-Kingshott, Claudia A. M. Gandini Wheeler-Kingshott, Marios C. Yiannakas   +20 more
doaj   +1 more source

Reliability and Validity of Power Spectrum Slope (PSS): A Metric for Measuring Resting-State Functional Magnetic Resonance Imaging Activity of Single Voxels

Frontiers in Neuroscience, 2022
Methods that capture the features of single voxels of resting-state fMRI (RS-fMRI) could precisely localize the abnormal spontaneous activity and hence guide precise brain stimulation.
Zhenxiang Zang, Zhenxiang Zang, Yang Qiao, Shaozhen Yan, Shaozhen Yan, Jie Lu, Jie Lu   +6 more
doaj   +1 more source

High-field optically detected nuclear magnetic resonance in GaAs [PDF]

Appl. Phys. Lett. 86, 182103 (2005), 2005
A method for high-field optically detected nuclear magnetic resonance (ODNMR) is developed sensitive to 10**8 nuclei. Nuclear spin transitions are induced using a radio frequency coil and detected through Faraday rotation spectroscopy. Unlike conventional ODNMR, which is limited to low fields and relies on the measurement of time-averaged luminescence ...
arxiv   +1 more source

First and second trimester urinary metabolic profiles and fetal growth restriction: an exploratory nested case-control study within the infant development and environment study

BMC Pregnancy and Childbirth, 2018
Background Routine prenatal care fails to identify a large proportion of women at risk of fetal growth restriction (FGR). Metabolomics, the comprehensive analysis of low molecular weight molecules (metabolites) in biological samples, can provide new and ...
Gauri Luthra, Ivan Vuckovic, A. Bangdiwala, H. Gray, J. B. Redmon, E. S. Barrett, S. Sathyanarayana, R. H. N. Nguyen, S. H. Swan, S. Zhang, P. Dzeja, S. I. Macura, K. S. Nair   +12 more
doaj   +1 more source

Two-dimensional terahertz magnetic resonance spectroscopy of collective spin waves [PDF]

Phys. Rev. Lett. 118, 207204 (2017), 2016
Nonlinear manipulation of nuclear and electron spins is the basis for all advanced methods in magnetic resonance including multidimensional nuclear magnetic and electron spin resonance spectroscopies, magnetic resonance imaging, and in recent years, quantum control over individual spins.
arxiv   +1 more source

Force-detected nuclear magnetic resonance: Recent advances and future challenges [PDF]

Nanotechnology 21, 342001 (2010), 2010
We review recent efforts to detect small numbers of nuclear spins using magnetic resonance force microscopy. Magnetic resonance force microscopy (MRFM) is a scanning probe technique that relies on the mechanical measurement of the weak magnetic force between a microscopic magnet and the magnetic moments in a sample.
arxiv   +1 more source

Spatial Imaging and Mechanical Control of Spin Coherence in Strained GaAs Epilayers [PDF]

, 2005
The effect of uniaxial tensile strain on spin coherence in n-type GaAs epilayers is probed using time-resolved Kerr rotation, photoluminescence, and optically-detected nuclear magnetic resonance spectroscopies. The bandgap, electron spin lifetime, electron g-factor, and nuclear quadrupole splitting are simultaneously imaged over millimeter scale areas ...
arxiv   +1 more source

Accelerated nanoscale magnetic resonance imaging through phase multiplexing [PDF]

Applied Physics Letters 106, 213101 (2015), 2014
We report a method for accelerated nanoscale nuclear magnetic resonance imaging by detecting several signals in parallel. Our technique relies on phase multiplexing, where the signals from different nuclear spin ensembles are encoded in the phase of an ultrasensitive magnetic detector.
arxiv   +1 more source