Results 11 to 20 of about 2,861,082 (242)

Nuclear magnetic resonance [PDF]

, 2012
Podeu consultar el llibre complet a: http://hdl.handle.net/2445/32166This article reviews the principles and methods of nuclear magnetic resonance spectroscopy, and gives examples of applications carried out at our Facility, which illustrate the ...
Molins i Montserrat, Mª Antònia, Gairí Tahull, Margarida, Muñoz-Torrero López-Ibarra, Victoria, Gonzalez, Teresa, Feliz Rodenas, Miguel   +4 more
core   +7 more sources

MIG gas shielding : Economic savings without detriment to quality [PDF]

, 2011
Over the years a number of claims have been made related to potential savings of the shielding gas used in the MIG process. A number of work streams have been set up to consider such areas from a technical and economic standpoint. The use of small helium
Gillies, Andrew, Campbell, Stuart, Moore, A.J., Scanlon, Thomas, Galloway, Alexander, Wu, T, McPherson, Norman   +6 more
core   +4 more sources

Nuclear magnetic shielding in HD and HT [PDF]

, 2022
We perform a calculation of the nuclear magnetic shielding in HD and HT molecules, with complete and perturbative accounts for nuclear masses. From the difference in shielding, we obtain the deuteron and triton magnetic moments in agreement with the ...
Komasa, Jacek, Spyszkiewicz, Anna, Pachucki, Krzysztof, Puchalski, Mariusz   +3 more
core   +1 more source

GMAW shielding gas flow optimisation by refinement of nozzle geometry [PDF]

, 2013
With an ongoing demand to improve the efficiency of the gas metal arc welding process, steps are being taken to reduce the shielding gas consumption. However, sufficient shielding gas coverage of the weld region is essential for the generation of high ...
S.W. Campbell, A.M. Galloway, Campbell, Stuart, Galloway, Alexander, N.A. McPherson, McPherson, Norman   +5 more
core   +4 more sources

Embroidered Coils for Magnetic Resonance Sensors [PDF]

, 2013
Magnetic resonance imaging is a widely used technique for medical and materials imaging. Even though the objects being imaged are often irregularly shaped, suitable coils permitting the measurement of the radio-frequency signal in these systems are ...
Newton, Michael, Dias, Tilak, Glen McHale, Tilak Dias, Michael Newton, Morris, Robert, McHale, Glen, Robert Morris   +7 more
core   +1 more source

Searching for the Best Values of NMR Shielding and Spin-Spin Coupling Parameters: CH_4-nF_n Series of Molecules as the Example

Molecules, 2023
Attempts at the theoretical interpretation of NMR spectra have a very long and fascinating history. Present quantum chemical calculations of shielding and indirect spin-spin couplings permit modeling NMR spectra when small, isolated molecules are studied.
Karol Jackowski, Mateusz A. Słowiński
doaj   +1 more source

The Radiofrequency NMR Spectra of Lithium Salts in Water; Reevaluation of Nuclear Magnetic Moments for 6Li and 7Li Nuclei

Magnetochemistry, 2018
LiCl and LiNO3 water solutions in the presence of small amounts of 3-helium have been investigated by means of multinuclear resonance spectroscopy. The resulting concentration dependences of the 3He, 6,7Li+, 14NO3− and 35Cl− resonance radiofrequencies ...
Włodzimierz Makulski
doaj   +1 more source

Characterization of magnetic field noise in the ARIADNE source mass rotor

Physical Review Research, 2022
The Axion Resonant Interaction Detection Experiment (ARIADNE) is a nuclear-magnetic-resonance-based experiment that will search for novel axion-induced spin-dependent interactions between an unpolarized source mass rotor and spin-polarized ^{3}He nuclei ...
Nancy Aggarwal, A. Schnabel, J. Voigt, Alex Brown, J. C. Long, S. Knappe-Grueneberg, W. Kilian, A. Fang, A. A. Geraci, A. Kapitulnik, D. Kim, Y. Kim, I. Lee, Y. H. Lee, C. Y. Liu, C. Lohmeyer, A. Reid, Y. Semertzidis, Y. Shin, J. Shortino, E. Smith, W. M. Snow, E. Weisman, H. Zhang   +23 more
doaj   +1 more source

Influence of stereoelectronic interactions on the 13C NMR chemical shift in iodine-containing molecules

Journal of Magnetic Resonance Open, 2022
Methyl substitution in ortho position causes a deshielding of 6–7 ppm on the 13C NMR chemical shift of the own methyl group and the carbon nucleus bonded to iodine atom (ipso) in iodobenzene-like molecules.
Renan V. Viesser, Cláudio F. Tormena
doaj   +1 more source

Theoretical Study of H/D Isotope Effects on Nuclear Magnetic Shieldings Using an ab initio Multi-Component Molecular Orbital Method

Molecules, 2013
We have theoretically analyzed the nuclear quantum effect on the nuclear magnetic shieldings for the intramolecular hydrogen-bonded systems of σ-hydroxy acyl aromatic species using the gauge-including atomic orbital technique combined with our multi ...
Masanori Tachikawa, Takayoshi Ishimoto, Taro Udagawa   +2 more
doaj   +1 more source