Eosinophilic ulcer of the tongue

Abstract

Two cases of tongue ulcers are presented. Histopathologic examination of biopsy specimens obtained from each case showed marked submucosal and muscular infiltration of polymorphonuclear eosinophils compatible with the diagnosis of eosinophilic ulcer of the tongue. The disease entity appears to be uncommon, yet, it should be recognized as benign since in both instances, healing was spontaneous.

Solvolysis kinetics of pentaammine(trifluoromethanesulfonato-O) complexes of cobalt(III), rhodium(III), and iridium(III)

“…The effect of solvent on the rates of reactions of transition-metal complexes has been reviewed. 27 Previously, analysis of results has included attempts to establish relationships of rate constant with dielectric constant, viscosity, and solvent polarity. The use of bulk solvent properties such as dielectric constant and viscosity have occasionally yielded useful relationships such as the log k vs. 1/e relationships for isomerization of haloalkene and haloketone complexes of lowvalent platinum.26 However, microscopic dielectric constants in the vicinity of ions may be very different from bulk values employed, so it may be unreasonable to expect useful relationships with ionic compounds; e for water within 1.5 Á of an ion has been estimated to fall to ~5, rising to ~80 4 Á from the ion.…”