Chemical compounds, being the alkyl sulfate of sulfated saccharides, particularly, dextrin, dextran, and cyclodextrin, and pharmaceutical compositions containing these compounds. The spray product discharge rate of the inventive aerosol can is adjustable by means of an adjusting device provided in the spray head. Formation of the ion-exchange layer as a charge-mosaic layer consisting of the cationic polymer domains and the anionic polymer domains provides a charge-mosaic membrane exhibiting excellent electrolyte permselectivity and mechanical strength. The control device acts upon the second transistor to assure the charging of the capacitor. The circular portion at one end of the shaft is an annular plate that has at least two protrusions developed perpendicular to the circular plane. Also disclosed is an image processing method.