Results 51 to 60 of about 1,356,161 (305)

Method of relaxation rates measurement in proton-containing materials

Journal of Electronic Science and Technology, 2020
A method of the relaxation time measurement in a flowing sample, based on the comparison of the amplitudes of nuclear magnetic resonance (NMR) signals observed from the reference and tested flowing samples was represented.
Sergey Ermak, Vladimir Semenov, Roman Lozov   +2 more
doaj   +1 more source

Application of XGBoost model for in-situ water saturation determination in Canadian oil-sands by LF-NMR and density data

Scientific Reports, 2022
Water saturation determination is among the most challenging tasks in petrophysical well-logging, which directly impacts the decision-making process in hydrocarbon exploration and production. Low-field nuclear magnetic resonance (LF-NMR) measurements can
Strahinja Markovic, Jonathan L. Bryan, Reza Rezaee, Aman Turakhanov, Alexey Cheremisin, Apostolos Kantzas, Dmitry Koroteev   +6 more
doaj   +1 more source

Molecular dynamics simulation of spin-lattice NMR relaxation in poly-L-lysine dendrimers: manifestation of the semiflexibility effect.

Physical Chemistry, Chemical Physics - PCCP, 2015
NMR relaxation experiments are widely used to investigate the local orientation mobility in dendrimers. In particular, the NMR method allows one to measure the spin-lattice relaxation rate, 1/T1, which is connected with the orientational autocorrelation ...
D. Markelov, S. Falkovich, I. Neelov, M. Ilyash, V. Matveev, E. Lähderanta, P. Ingman, A. A. Darinskii   +7 more
semanticscholar   +1 more source

Counterion Dependent Side‐Chain Relaxation Stiffens a Chemically Doped Thienothiophene Copolymer

Advanced Functional Materials, EarlyView.
Oxidation of a thienothiophene copolymer, p(g3TT‐T2), via different doping strategies and dopant molecules resulted in materials with similar oxidation levels and a high electrical conductivity of ≈100 S cm−1. However, mechanical properties varied significantly, with sub‐glass transition temperatures and elastic moduli spanning from –44°C to –3°C and ...
Mariavittoria Craighero, Meghna Jha, Elsa Veronica Flores‐Vela, Joost Kimpel, Andreas Schaefer, Jiali Guo, Jesika Asatryan, Alberto Peinador Veiga, Shuichi Haraguchi, Per‐Anders Carlsson, Jaime Martín, Mariano Campoy‐Quiles, Christian Müller   +12 more
wiley   +1 more source

Solvent inhibition in the liquid-phase catalytic oxidation of 1,4-butanediol: understanding the catalyst behaviour from NMR relaxation time measurements

, 2016
Catalytic reaction studies and nuclear magnetic resonance (NMR) relaxation time measurements have been compared to study the influence of competitive adsorption of reactant and solvent on catalytic conversion. The reaction chosen is the aerobic catalytic
C. D'agostino, M. Feaviour, G. Brett, J. Mitchell, A. York, G. Hutchings, M. Mantle, L. Gladden   +7 more
semanticscholar   +1 more source

Bio‐Inspired Molecular Events in Poly(Ionic Liquids)

Advanced Functional Materials, EarlyView.
Originating from dipolar and polar inter‐ and intra‐chain interactions of the building blocks, the topologies and morphologies of poly(ionic liquids) (PIL) govern their nano‐ and micro‐processibility. Modulating the interactions of cation‐anion pairs with aliphatic dipolar components enables the tunability of properties, facilitated by “bottom‐up ...
Jiahui Liu, Marek W. Urban
wiley   +1 more source

Quantification of dissolved O2 in bulk aqueous solutions and porous media using NMR relaxometry

Scientific Reports, 2021
Effects of dissolved paramagnetic oxygen (O2) in water on 1H nuclear magnetic resonance (NMR) Carr-Purcell-Meiboom-Gill (CPMG) experiments is evaluated at a 1H Larmor frequency of 2 MHz.
Kurt Livo, Manika Prasad, Trent R. Graham   +2 more
doaj   +1 more source

Sustainable Catalyst‐Free PLG Networks: Recyclability, Biodegradability, and Functional Performance

Advanced Functional Materials, EarlyView.
A catalyst‐additive free covalent adaptable network is developed from star‐shaped poly(lactide‐co‐glycolide) cross‐linked with pyromellitic dianhydride, enabling internal carboxylic acid‐driven transesterification. The resulting biodegradable network exhibits mechanical robustness (Young's modulus ≈1.6 GPa), complete recyclability, rapid biodegradation
Lars Schwarzer, Emilia Fulajtar, Seema Agarwal   +2 more
wiley   +1 more source

Structural properties of two inequivalent Cs(1) and Cs(2) sites in perovskite tricaesium pentahalogencobaltate, Cs3CoX5 (X = Cl, Br)

AIP Advances, 2017
The local structures of Cs3CoX5 (X = Cl, Br) were examined using nuclear magnetic resonance (NMR) and magic angle spinning (MAS) NMR experiments. The two inequivalent Cs(1) and Cs(2) sites in two compounds were clearly distinguished based on static NMR ...
Ae Ran Lim, Sung Soo Park, Jin-Hae Chang
doaj   +1 more source

Substrate Modulated Dynamics of the ADP/ATP Transporter Revealed by NMR Relaxation Dispersion

Nature Structural &Molecular Biology, 2015
The ADP/ATP carrier (AAC) transports ADP and ATP across the inner mitochondrial membrane. Unlike most transporters, which have two-fold direct or inverted quasisymmetry, AAC has apparent three-fold rotational symmetry.
Sven Brüschweiler, Qin Yang, Changqing Run, J. Chou   +3 more
semanticscholar   +1 more source