Origin of the MRI Contrast in Natural and Hydrogel Formulation of Pineapple Juice

Figure 7

¹H longitudinal relaxivity (a, c) and transverse relaxivity (b, d) at 25 °C and their dipolar, Fermi-contact, and outer-sphere contributions in the pineapple juice (a, b) and in the Mn²⁺ solution (c, d) upon addition of 15% w/w alginate.

(a)

(b)

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(d)