We present a method to identify and sort the oils in oil-water mixtures based on the Overhauser dynamic nuclear polarization (ODNP) enhancement at low field. Through combining two types of radicals, e.g. ODNP enhancer TEMPO and relaxation reagent Mn2+, we can selectively enhance the 1H NMR signal of oil in oil-water mixture infiltrated in porous media. More importantly, we have found that the enhancements of light oils in porous materials are inversely dependent of their viscosities but independent of pore size approximately above 10 ?m. This allows us to roughly sort oils according to their ODNP enhancement values. The verification experiments in sandstones saturated with several oil and water mixtures show that the method is useful for oils identification and classification in porous media, especially for reservoir assessment or development.
Optically-generated Overhauser dynamic nuclear polarization: A numerical analysis #ODNP #DNPNMR
From The DNP-NMR Blog:
Optically-generated Overhauser dynamic nuclear polarization: A numerical analysis #ODNP #DNPNMR
Cheney, Daniel J., and Christopher J. Wedge. “Optically-Generated Overhauser Dynamic Nuclear Polarization: A Numerical Analysis.” The Journal of Chemical Physics 152, no. 3 (January 21, 2020): 034202.
https://doi.org/10.1063/1.5133408.
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02-29-2020 09:52 PM
Overhauser Dynamic Nuclear Polarization for the Study of Hydration Dynamics, Explained #DNPNMR #ODNP
From The DNP-NMR Blog:
Overhauser Dynamic Nuclear Polarization for the Study of Hydration Dynamics, Explained #DNPNMR #ODNP
Franck, John M., and Songi Han. “Overhauser Dynamic Nuclear Polarization for the Study of Hydration Dynamics, Explained.” In Methods in Enzymology, 615:131–75. Elsevier, 2019.
https://doi.org/10.1016/bs.mie.2018.09.024.
We outline the physical properties of hydration water that are captured by Overhauser Dynamic Nuclear Polarization (ODNP) relaxometry and explore the insights that ODNP yields about the water and the surface that this water is coupled to. As...
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05-06-2019 04:47 PM
In-situ Overhauser-enhanced nuclear magnetic resonance at less than 1 ?T using an atomic magnetometer #DNPNMR #ODNP
From The DNP-NMR Blog:
In-situ Overhauser-enhanced nuclear magnetic resonance at less than 1 ?T using an atomic magnetometer #DNPNMR #ODNP
Lee, Hyun Joon, Seong-Joo Lee, Jeong Hyun Shim, Han Seb Moon, and Kiwoong Kim. “In-Situ Overhauser-Enhanced Nuclear Magnetic Resonance at Less than 1 ?T Using an Atomic Magnetometer.” Journal of Magnetic Resonance 300 (March 1, 2019): 149–52.
https://doi.org/10.1016/j.jmr.2019.02.001.
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03-24-2019 10:41 PM
A table-top PXI based low-field spectrometer for solution dynamic nuclear polarization #DNPNMR #ODNP
From The DNP-NMR Blog:
A table-top PXI based low-field spectrometer for solution dynamic nuclear polarization #DNPNMR #ODNP
Biller, Joshua R., Karl F. Stupic, and J. Moreland. “A Table-Top PXI Based Low-Field Spectrometer for Solution Dynamic Nuclear Polarization.” Magnetic Resonance in Chemistry 56, no. 3 (2017): 153–63.
https://doi.org/10.1002/mrc.4672.
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06-20-2018 08:56 PM
Free Radical Imaging Using In Vivo Dynamic Nuclear Polarization-MRI #DNPNMR #ODNP
From The DNP-NMR Blog:
Free Radical Imaging Using In Vivo Dynamic Nuclear Polarization-MRI #DNPNMR #ODNP
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Utsumi, H. and F. Hyodo, Free Radical Imaging Using In Vivo Dynamic Nuclear Polarization-MRI. Methods Enzymol, 2015. 564: p. 553-71.
https://www.ncbi.nlm.nih.gov/pubmed/26477265
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08-18-2017 04:59 PM
Chapter Sixteen - Overhauser Dynamic Nuclear Polarization Studies on Local Water Dynamics #DNPNMR
From The DNP-NMR Blog:
Chapter Sixteen - Overhauser Dynamic Nuclear Polarization Studies on Local Water Dynamics #DNPNMR
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Kaminker, I., R. Barnes, and S. Han, Chapter Sixteen - Overhauser Dynamic Nuclear Polarization Studies on Local Water Dynamics, in Methods in Enzymology, Z.Q. Peter and W. Kurt, Editors. 2015, Academic Press. p. 457-483.
http://www.sciencedirect.com/science/article/pii/S0076687915004000
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03-09-2017 12:11 AM
Quantitative cw Overhauser effect dynamic nuclear polarization for the analysis of local water dynamics
From The DNP-NMR Blog:
Quantitative cw Overhauser effect dynamic nuclear polarization for the analysis of local water dynamics
Franck, J.M., et al., Quantitative cw Overhauser effect dynamic nuclear polarization for the analysis of local water dynamics. Prog Nucl Magn Reson Spectrosc, 2013. 74(0): p. 33-56.
http://www.ncbi.nlm.nih.gov/pubmed/24083461
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11-21-2013 01:14 AM
Quantitative cw Overhauser Dynamic Nuclear Polarization for the Analysis of Local Water Dynamics
Quantitative cw Overhauser Dynamic Nuclear Polarization for the Analysis of Local Water Dynamics
Publication date: Available online 4 July 2013
Source:Progress in Nuclear Magnetic Resonance Spectroscopy</br>
Author(s): John M. Franck , Anna Pavlova , John A. Scott , Songi Han</br>
Liquid state Overhauser Effect Dynamic Nuclear Polarization (ODNP) has experienced a recent resurgence of interest. The ODNP technique described here relies on the double resonance of electron spin resonance (ESR) at the most common, i.e. X-band (~ 10 GHz), frequency and 1H nuclear...
Characterizing oils in oil-water mixtures inside porous media by Overhauser dynamic nuclear polarization #DNPNMR #ODNP
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