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

Table 2

Best fit parameters for Mn²⁺ solution without and with addition of alginate 5% or 15% w/w.

	Mn^2+ solution		+5% alginate		+15% alginate
	25°C	37°C	25°C	37°C	25°C	37°C
	2.85						Å
	6
	0.018 ± 0.001						cm^−1
	28 ± 1	20 ± 1	4200 ± 1400	3100 ± 1200	3800 ± 600	2700 ± 500	ps
	5.3 ± 0.1	4.5 ± 0.1	17 ± 2	16 ± 2	18 ± 1	18 ± 1	Ps
	18 ± 1	14 ± 1	44 ± 16	29 ± 11	220 ± 100	100 ± 70	ns
	—		0.03 ± 0.01		0.06 ± 0.01
	—	—	39 ± 1	29 ± 1	51 ± 3	36 ± 2	ps
A^FC/h	0.82 ± 0.01		0.48 ± 0.08		0.29 ± 0.02		MHz

Outer sphere relaxation was also included with d = 3.6 Å and D = 3.0·10⁻⁵ and 3.9·10⁻⁵cm²/s at 25°C and 37°C, respectively. fixed.