Abstract
WE have found that ovalbumin dissolved in water decreases the proton spin–lattice relaxation time T1 and proton spin–spin relaxation time T2 and we show that this effect is due to an increase of correlation time of part of the water molecules. The correlation time τ can be defined as the mean time of persistence of the angular position of a water molecule and is simply related1 to the Debye dielectric relaxation time τd, τ=τd/3. According to the theory of nuclear magnetic relaxation by Solomon2, T1 and T2 are functions of τ. In some cases τ can be expressed as a function of the macroscopic viscosity of the liquid1, but in the case of protein solutions such an explanation is not possible as was shown by Hennel et al.3.
Published Version
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