Band gap engineered zinc oxide nanostructures a sol-gel synthesis of solvent driven shape-controlled crystal growth.

A reliable sol-gel approach, which combines the formation of ZnO nanocrystals and a solvent driven, shape-controlled, crystal-growth process to form well-organized ZnO nanostructures at low temperature is presented. The sol of ZnO nanocrystals showed shape-controlled crystal growth with respect to the solvent type, resulting in either nanorods, nanoparticles, or nanoslates. The solvothermal process, along with the solvent polarity facilitate the shape-controlled crystal growth process, augmenting the concept of a selective adhesion of solvents onto crystal facets and controlling the final shape of the nanostructures.

Final design of the beam source for the MITICA injector.

The megavolt ITER injector and concept advancement experiment is the prototype and the test bed of the ITER heating and current drive neutral beam injectors, currently in the final design phase, in view of the installation in Padova Research on Injector Megavolt Accelerated facility in Padova, Italy. The beam source is the key component of the system, as its goal is the generation of the 1 MeV accelerated beam of deuterium or hydrogen negative ions. This paper presents the highlights of the latest developments for the finalization of the MITICA beam source design, together with a description of the most recent analyses and R&D activities carried out in support of the design.

Full-time dental faculty perceptions of satisfaction with the academic work environment.

A significant factor in a faculty member's accepting or maintaining an academic appointment is the work environment. Assessing the work environment to identify characteristics that could increase faculty retention and recruitment could be valuable to an educational institution. This study assessed the academic dental work environment to identify positive and negative areas affecting career satisfaction.

Improving the oral hygiene of institutionalized mentally retarded clients.

Purpose: The quality of oral health care of persons with mental retardation has been reported in the literature to be less than that of their normal peers. The purpose of this study, set in a Midwest institution for persons with developmental retardation, was to determine if a change in policy followed by staff training and monitored by an interested third party would improve the oral hygiene of clients living on wards.

Methods: Methods used to train staff in proper toothbrushing were developed.

Management of patients needing antibiotic prophylaxis in a dental education setting.

The management of antibiotic prophylaxed (ABX) patients at an educational institution was evaluated to identify areas for improvement. Management criteria, reflecting guidelines to prevent oral-induced hematogenous microbial seeding, were pretested and applied to 1,225 record entries of eighty-five patients needing ABX for dental treatment between 1991 and 1996. Seven hundred twenty-two of the visits had 857 management or documentation problems, including no documentation indicating whether or not patients premedicated (n = 281); incomplete, insufficient, or repeated treatment (n = 214); and preventive concerns (n = 172), among others.

Retention of cemented implant-supported restorations.

Purpose: This investigation compared cement failure loads of a gold cylinder luted to a CeraOne titanium abutment (5-mm-high chimney) 24 hours postcementation when either zinc phosphate, Tempbond NE, or Tempbond luting agent was used.

Materials And Methods: Luting agent (0.01 mL) was applied to the internal aspect of the gold cylinder, and the cylinder was seated with finger pressure followed by a load of 5 kg for 10 minutes.

Sjögren's syndrome: a challenge for dentistry.

Sjögren's syndrome presents dentists with many challenges, from diagnosis to therapy. The secondary effects of xerostomia cause a spectrum of oral problems, including caries, candidal infection, and inflammation of the oral mucosa. The oral signs and symptoms may be the first manifestations of systemic aspects of the disease.

Numerical simulation of the signal and data processing of the HIPPARCOS satellite.

This paper presents a theoretical study of the diffraction pattern which will be obtained with the telescope launched aboard the HIPPARCOS satellite. The output signal is studied by simulating observations of various stars of different spectral types and classes. In the case of very faint stars, the signal will consist of only a few photons during a sampling interval, so that a statistical recovery of the signal will be needed.