The epithelial tissue forming the posterior aspect of the apical foramen in the upper incisor of the rat was reconstructed from 1 μm thick serial cross sections. Like the lower incisor, this portion of the odontogenic organ in the upper incisor was composed of a bulbous and a "U"-shaped part. However, the bulbous part was considerably blunter and the "U"-shaped part much larger in circumference...

there have been few longitudinal studies on sick building syndrome (sbs), which include headache, fatigue, and runny nose. we considered effect of sick building syndrome with illnesses like headache, fatigue and runny nose. thus, we designed a questionnaire and asked from male of dormitory residence. questions of the questionnaire were more about known symptoms of buildings (headache, fatigue, ...