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- W2092503411 abstract "We examined the magnetic resonance properties of 12 paramagnetic piperidinyl nitroxyls in water and plasma solutions. Paramagnetic contributions to proton relaxation times were measured using 10.7 and 100 MHz spectrometers. Proton relaxation enhancement from nitroxyls increased with ascending molecular weight, in plasma solutions versus equimolar aqueous solutions, and with measurements at 10.7 MHz compared to 100 MHz. Relaxation rates were observed to approximately double at 10.7 MHz compared to 100 MHz and from water to plasma solutions. The data indicate that proton spin-lattice relaxation enhancement is magnetic field-dependent, and increases using nitroxyls of large molecular weight and with chemical substitutents that increase the microviscosity of solvent water molecules. The development of nitroxyls for diagnostic MRI will be aided by understanding these in vitro physical characteristics and trends." @default.
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- W2092503411 date "1985-01-01" @default.
- W2092503411 modified "2023-10-17" @default.
- W2092503411 title "Magnetic field dependence of spin-lattice relaxation enhancement using piperidinyl nitroxyl spin-labels" @default.
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- W2092503411 doi "https://doi.org/10.1016/0730-725x(85)90011-6" @default.
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