Results 261 to 270 of about 1,457,064 (320)

Microwetting dynamic behavior and mechanism for coal dust based on low field NMR method—A case study

, 2021
With the gradual improvement of coal mine mechanization and automation, improving the production efficiency has also caused the dust concentration at the production site to increase significantly, which not only poses a great threat to the occupational ...
Qingtao Zhang, Gang Zhou, H. Yingying, Mengyao Xing, Rui Zhang, Pengfei Wang, Shengyong Hu   +6 more
semanticscholar   +1 more source

NMR at very low fields

Magnetic Resonance Imaging, 2010
Although nuclear magnetic resonance in low fields around or below the Earth's magnetic field is almost as old as nuclear magnetic resonance itself, the recent years have experienced a revival of this technique that is opposed to the common trend towards higher and higher fields.
Lutz, Trahms, Martin, Burghoff
openaire   +2 more sources

Hydration kinetics of cementitious materials based on low-field NMR and isothermal calorimetry

Fullerenes, nanotubes, and carbon nanostructures, 2021
The Krstulovic-Dabic (KD) hydration kinetic model is often used to study the hydration mechanism of cement-based materials. Based on this model, isothermal calorimetry is usually to study the hydration kinetics of cementitious materials, and the obtained
An-ming She, Kun Ma, Wu Yao, J. Zuo, G. Liao   +4 more
semanticscholar   +1 more source

Gated cardiac imaging using low-field NMR

Physics in Medicine and Biology, 1986
A system for the ECG gating of NMR images is described. It is based on the Aberdeen Mark 1 0.04 T imager and a 280 microprocessor to control data acquisition. The collection of images is discussed including: saturation recovery images; inversion recovery images and phase-encoded images.
D G, Norris, J M, Hutchison
openaire   +2 more sources

Low frequency magnetic field plus high pH promote the quality of pork myofibrillar protein gel: A novel study combined with low field NMR and Raman spectroscopy.

Food Chemistry, 2020
This study investigated the combined effects of low frequency magnetic field (LF-MF) (3.8 mT) and pH (5-7) on pork myofibrillar protein (MP) gel quality. With LF-MF applying, the water ratio and migration rate both changed to varying extents.
Kun Yang, Yuanhua Zhou, Juanjuan Guo, Xiaolong Feng, Xian Wang, Limei Wang, Jing Ma, Weiqing Sun   +7 more
semanticscholar   +1 more source

Low field 11B nmr in YRh4B4

Physica B+C, 1981
Abstract An adiabatic field cycling technique is used to study the 11 B nmr in the anomalous ternary superconductor YRh 4 B 4 at fields below H c1 .
F.Y. Fradin, P.K. Tse, J.W. Downey
openaire   +1 more source

Low Field NMR Water Cut Metering

Canadian International Petroleum Conference, 2002
Abstract We have developed a new on line water cut meter using low field Nuclear Magnetic Resonance (NMR) technology. This instrument is designed for use on heavy oil systems where conventional instruments experience difficulties.
Ian Wright, Lastockin David, Allsopp Kevin, Evers-Dakers Maureen, Kantzas Apostolos   +4 more
openaire   +1 more source

Low field NMR measurements in3He-A

Physica B: Condensed Matter, 1994
Abstract We are making simultaneous measurements of the longitudinal and transverse resonances in fields of the order of 30 gauss in a parallel plate geometry, defined by mylar films 100 μm apart, so that l is well oriented perpendicular to the static magnetic field.
T.R. Mullins, V.V. Dmitriev, A.J. Armstrong, J.R. Hook, H.E. Hall   +4 more
openaire   +1 more source

Study on the Effects of Heterogeneous Distribution of Methane Hydrate on Permeability of Porous Media Using Low‐Field NMR Technique

Journal of Geophysical Research: Solid Earth, 2020
The permeability of sediments is an important parameter that effects flow characteristics of the gas and water in the process of natural gas hydrates development. The distribution of gas hydrate is generally heterogeneous in porous media.
Yunkai Ji, Jian Hou, Ermeng Zhao, Nu Lu, Yajie Bai, Kang Zhou, Yongge Liu   +6 more
semanticscholar   +1 more source

A method to probe the pore-throat structure of tight reservoirs based on low-field NMR: Insights from a cylindrical pore model

, 2020
This research proposes a new method of estimating pore-throat size distribution that converted based on nuclear magnetic resonance (NMR) T2 spectra, so as to more accurately explore the pore-throat structures of tight reservoirs. In this work, one of the
Hexin Huang, Rongxi Li, Fengyang Xiong, H. Hu, Wei Sun, Zhenxue Jiang, Lei Chen, Lin Wu   +7 more
semanticscholar   +1 more source