RESUMO
Resonant inelastic x-ray scattering (RIXS) provides remarkable opportunities to interrogate ultrafast dynamics in liquids. Here we use RIXS to study the fundamentally and practically important hydroxyl radical in liquid water, OH(aq). Impulsive ionization of pure liquid water produced a short-lived population of OH(aq), which was probed using femtosecond x-rays from an x-ray free-electron laser. We find that RIXS reveals localized electronic transitions that are masked in the ultraviolet absorption spectrum by strong charge-transfer transitions-thus providing a means to investigate the evolving electronic structure and reactivity of the hydroxyl radical in aqueous and heterogeneous environments. First-principles calculations provide interpretation of the main spectral features.
RESUMO
Odontogenic tumors comprise a complex group of lesions of diverse histopathological types and clinical behavior. The group of mixed odontogenic tumors, which are also rare, is composed of proliferating odontogenic epithelium in a cellular ectomesenchyme resembling dental papilla. Ameloblastic fibrodentinoma is a rare benign odontogenic tumor. The present case report discusses this tumor composed of odontogenic epithelium and odontogenic mesenchyme with dentin or dentin like tissue. The present paper also throws light on various histological similarities and complexities which make the interpretation of these set of odontogenic tumors a diagnostic dilemma.