Zobrazeno 1 - 10
of 13
pro vyhledávání: '"Hyung-Tae Kwak"'
Publikováno v:
SPE Russian Petroleum Technology Conference.
Autor:
Peter L. Gor’kov, Zhehong Gan, Timothy A. Cross, Mark D. Bird, Kiran Shetty, William W. Brey, Hyung-Tae Kwak
Publikováno v:
Journal of Magnetic Resonance. 191:135-140
Resistive and resistive-superconducting hybrid magnets can generate dc magnetic fields much higher than conventional superconducting NMR magnets but the field spatial homogeneity and temporal stability are usually not sufficient for high-resolution N
Autor:
Zhehong Gan, Philip J. Grandinetti, Travis H. Sefzik, Subramanian Prasad, Ted M. Clark, Hyung-Tae Kwak
Publikováno v:
Journal of Non-Crystalline Solids. 352:2834-2840
Pyrex ® is an ubiquitous material that has attained widespread use in laboratory glassware and household utensils due to its properties, cost effectiveness, and ease of fabrication. Despite its importance, the structure of borosilicate glass such as
Autor:
Hyung-Tae Kwak, Zhehong Gan
Publikováno v:
Journal of Magnetic Resonance. 168:346-351
Multiple-quantum magic-angle spinning experiment removes second-order quadrupolar broadening from the central-transition of half-integer quadrupolar nuclei. This paper presents a novel scheme to enhance the sensitivity of MQMAS using signals from mul
Publikováno v:
Solid State Nuclear Magnetic Resonance. 24:71-77
Rotor-assisted population transfer (RAPT) was developed as a method for enhancing MAS NMR sensitivity of quadrupolar nuclei by transferring polarization associated with satellite transitions to the central m=12---12 transition. After a single RAPT tr
Publikováno v:
Journal of Magnetic Resonance. 160:107-113
The dependence of the (Rotor Assisted Population Transfer) RAPT enhancement on offset frequency for nuclei experiencing different quadrupolar couplings has been exploited to design two new spectral editing schemes, pi/2-RAPT and RAPT-pi-RAPT, for the
Publikováno v:
Journal of Magnetic Resonance. 153:151-154
Reference EPFL-ARTICLE-204450doi:10.1006/jmre.2001.2435View record in Web of Science Record created on 2015-01-08, modified on 2017-12-03
Publikováno v:
ResearcherID
An approach for enhancing the NMR sensitivity of the central transition of spin-3/2 nuclei is presented. Through selective excitation of the satellite transitions using a fast 180 degrees phase alternating pulse train during magic-angle spinning a se
Autor:
Subramanian, Prasad, Ted M, Clark, Ramesh, Sharma, Hyung-Tae, Kwak, Philip J, Grandinetti, Herbert, Zimmermann
Publikováno v:
Solid state nuclear magnetic resonance. 29(1-3)
We report the application of rotor-assisted population transfer (RAPT) to measure the quadrupolar coupling constant (C(q)) for spin 5/2 nuclei. Results from numerical simulations are presented on the magnitude of enhancement factor as a function of f
Autor:
Zhehong Gan, Hyung-Tae Kwak
Publikováno v:
Journal of magnetic resonance (San Diego, Calif. : 1997). 164(2)
Double-quantum and double-quantum-filtered satellite-transition magic-angle spinning (STMAS) experiments are proposed. The experiments efficiently convert satellite-transition coherence from single- to double-quantum with a central-transition selecti