H. Kimurasuda et al., DESALTING AND WATER RESTORATION OF SALTED JELLYFISH RHIZOSTOMEAE DURING IMMERSION IN WATER, Fisheries science, 61(6), 1995, pp. 948-950
The physical properties of salted jellyfish were studied by X-ray fluo
rescence (XRF), energy dispersive X-ray analysis (EDX), and thermograv
imetric analysis (TGA). The jellyfish were cut into two parts (Middle
and Edge) and immersed in water for up to 9 days. XRF and EDX analysis
results indicated that NaCl was removed from the salted jellyfish on
immersion, and that no further NaCl was lost after 3 h. Water contents
of unheated and heated (60 degrees C), Middle and Edge parts after im
mersion were analyzed by TGA. For each sample, water content increased
to an equilibrium level. For both unheated samples, water restoration
took about 1 h, so the desalting and water restoring times were diffe
rent. This implied that the mechanism of rehydration involved both dis
placement of NaCl by H2O and also swelling. Although the heated sample
s did shrink, the equilibrium water contents (after water restoration)
were very similar to the unheated samples. This indicated that the wa
ter retaining structure of the salted jellyfish was not damaged under
those conditions (60 degrees C for 15 min).