Using the sample of sun-dried tangle, I analized the distribution and changes in inorganic elements according to the geological location of production of the tangle, location of leaves, and tissues before boiling and after boiling with the analytical electron microscope, the atomic extinction method, and the titration method and stated the results in my last report of 1989. Through my experiment, I proved that there was a large quantity of S in the ascus part. This time, I used fresh tangle and conducted an X-ray microanalysis to investigate the formation of the ascus part, its relation with S and the distribution differences in inorganic elements according to the tissue with the analytical electron microscope, Results were as follows;
1. The location of "fucoidin" in which physiological activity can be found, highly relates with S. Therefore, we can easily acknowledge the degree of distribution by measuring the value of S.
2. Significant differences were found in the distribution of S, according to the location and tissue of the seaweed body.
3. Differences in distribution caused by the difference in tissue structure was also found with other inorganic elements.