introduction: various methods have been used for the treatment of dentine hypersensitivity such as dentifrices, sealants and different types of lasers. the aim of this study was to evaluate the effect of neodimium:yttrium-aluminium-garnet (nd:yag) laser in association with graphite on the dentin morphologic changes. methods: in this experimental in vitro study, 16 freshly extracted third molars...

OBJECTIVES to identify the prevalent nursing diagnoses (ND) in the hospitalized elder care; to compare the prevalent ND with the duration of hospital stay and with the prescribed cares for their respective diagnoses. METHOD Transversal historical study carried through in Porto Alegre, RS, by analyzing patient records age e60 years old, interned in clinical unities of a university hospital. ...

Patterned ZnO nanodot (ND) arrays and a ND-cavity microstructure were realized on an anodic alumina membrane (AAM) surface through a spin-coating sol–gel process, which benefits from the morphology and localized negative charge surface of AAM as well as the optimized sol concentration. The growth mechanism is believed to be a self-assembly process. This provides a simple approach to fabricate s...

Twenty-four different local and gradient-corrected density functional methods were used in a study of the reaction H + Hz-+ H2 + H. Barrier heights were calculated with a large basis set. The results were compared to those obtained by ab initio methods and experiment. It was found that conventional Kohn-Sham methods consistently and significantly underestimate the reaction barrier. In particula...

To facilitate the treatment of electromagnetic effects in applications such as dynamically perturbed vortons, this work employs a covariantly formulated string-source Green measure to obtain a coherent relativistic scheme for describing the self interaction of electromagnetic currents in string models of a very general kind, at leading order in the relevant field gradients, using a regularised ...

We explore the possibility that zitterbewegung is the key to a complete understanding of the Dirac theory of electrons. We note that a literal interpretation of the zitterbewegung implies that the electron is the seat of an oscillating bound electromagnetic field similar to de Broglie’s pilot wave. This opens up new possibilities for explaining two major features of quantum mechanics as consequ...

Minimally processed vegetables (MPV) are economically important commodities due to a combination of factors such as convenience, healthiness nd desirable sensory characteristics. These commodities are susceptible to microbiological invasion due to the presence of cut surfaces causing both icrobiological and physiological mechanisms to be possible limitations for the sensory shelf life. This rev...