Audio frequency dielectric constant measurements of CO and N in their solid phases are presented. Anomalous 2 temperature dependence of the dielectric constant in the a-phases of both CO and N and strong hysteresis effects above an 2 onset temperature T , 42 K in the b-phase of pure N have been observed. A simple mean-field theory is proposed which h 2

This article presents a case report of an intraoral teratoma in an 11-year-old boy. The tumor contained cartilage, smooth muscle, respiratory epithelium, brain, and skeletal muscle. Two adjacent cervical lymph nodes exhibited reactive changes, but another had been largely replaced by brain tissue.

SUMMARY Two cases of oral speckled leukoplakia with differing behaviour are presented. This precancerous lesion of unknown aetiology requires early diagnosis for proper management. Candida albicans are frequently found in these lesions. The significance of epithelial dysplasia in relation to treatment is discussed. Surgical removal is the treatment ofchoice.