background: recent results have provided increasing evidence to support involvement of membrane damage in the mechanism of ionizing radiation induced killing of mammalian cells. these findings have stimulated renewed interest in evaluating the damage to membrane as a primary initiator in radiation-induced cell killing especially in apoptotic death. the present study was aimed to gain deeper ins...

condensation pressure effect on microleakage of mineral trioxide aggregate seyed mohsen jalalzade 2elham khoshbin *3seyed abdolkarim tabatabaei endodontist, mashhad, iran. assistant professor of endodontic department, dental school, hamedan university of medical science, hamedan, iran post graduate student of pediatric dentistry department, dental school, shahid beheshti university of medical s...

condensation of glyoxal, formaldehyde and anilines lead to the formation of 2,4,6,8- tetraphenyl and substituted phenyl 2,4,6,8-tetraazabicyclo [3.3.0] octanes. the reactions are sensitive to ph and temperature. ortho derivatives of anilines do not participate in this condensation. x-ray structural determination reveals a cis-dienvelope geometery about the two fused rings.