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- W2083008520 abstract "The synergistic solvent extraction of cerium (III) using two acidic organophosphorus extractants, 2-ethylhexylphosphonic mono-2-ethylhexyl ester (PC 88A) and di-2-ethylhexyl phosphoric acid (D2EHPA), in a chloride medium was investigated using spectroscopic analyses. The mixture systems exhibited a synergistic effect on the extraction of Ce(III), and the synergism was due to the generation of a novel dimer, which combined with the PC 88A and D2EHPA unimer through hydrogen bonding interactions. The polymerization state and conformation of the PC 88A and D2EHPA were analyzed using fourier transform infrared spectroscopy (FT-IR), nuclear magnetic resonance spectroscopy (NMR) and mass spectrometry (MS), and the organic structure and composition of the extraction complexes were also characterized. Furthermore, the chelating forms of the complexes in the synergistic system were determined and explained using spectral data. During the extraction process, each Ce combined with three dimers of the extractant and released three H+, and the Ce cation exchanged with the POH group and coordinated with the PO group." @default.
- W2083008520 created "2016-06-24" @default.
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- W2083008520 date "1989-01-01" @default.
- W2083008520 modified "2023-10-18" @default.
- W2083008520 title "Signs of fertility: The personal science of natural birth control By Margaret Nofzinger. Nashville: MND Publishing, Inc. 1988. 100 pages. $6.95, softcover. Available from MND Publishing, Inc., P.O. Box 210813, Nashville, TN 37221. The price includes handling; TN residents add $0.54 for state sales tax" @default.
- W2083008520 doi "https://doi.org/10.1016/0091-2182(89)90142-0" @default.
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