Despoblamiento rural y cambios recientes en los procesos de urbanización regional

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La incidencia de las características de los empresarios en el desarrollo de las PYMEs: el caso de la metalmecánica en el Gran Buenos Aires

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Distritos industriales italianos: experiencias y aportes para el desarrollo de políticas industriales locales

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Pequeños y medianos empresarios industriales metalmecánicos de Rosario

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Teores de iodo em dietas secas e úmidas para gatos adultos comercializadas na cidade do Rio de Janeiro, Brasil

Were analyzed 29 samples, 16 wet and 13 dry cat food of different flavors. The iodine levels ranged from 2.7 to 3.4 (average 2.95 mg/kg/MS) in dry food and 2.9 to 4.0 (average 3.4 mg/kg/MS) in the wet food. Eight samples (27.6%) specified on the package the assurance level (maximum) of iodine, with a dry (2.0 mg/kg/diet) and seven wet (0.04 mg/kg/diet). All non-compliant, because the values were higher than declared. Cats fed commercial diets consume proportionally more iodine in wet food than cats fed dry diets, but both with high levels of iodine. All samples analyzed were above the amounts stated on the labels. Accordingly, the wet and dry commercial food for cats show no reliable values with those reported, resulting in a possible excessive intake of this trace element for animals in question.

Physicochemical and mechanical properties of zirconium oxide and niobium oxide modified Portland cement-based experimental endodontic sealers

Aim: To evaluate the physicochemical and mechanical properties of Portland cement-based experimental sealers (ES) with different radiopacifying agents (zirconium oxide and niobium oxide micro- and nanoparticles) in comparison with the following conventional sealers: AH Plus, MTA Fillapex and Sealapex. Methodology: The materials were tested for setting time, compressive strength, flow, film thickness, radiopacity, solubility, dimensional stability and formaldehyde release. Data were subjected to anova and Tukey tests (P < 0.05). Results: MTA Fillapex had the shortest setting time and lowest compressive strength values (P < 0.05) compared with the other materials. The ES had flow values similar to the conventional materials, but higher film thickness (P < 0.05) and lower radiopacity (P < 0.05). Similarly to AH Plus, the ES were associated with dimensional expansion (P > 0.05) and lower solubility when compared with MTA Fillapex and Sealapex (P < 0.05). None of the endodontic sealers evaluated released formaldehyde after mixing. Conclusion: With the exception of radiopacity, the Portland cement-based experimental endodontic sealers presented physicochemical properties according to the specifications no 57 ANSI/ADA (ADA Professional Product Review, 2008) and ISO 6876 (Dentistry - Root Canal Sealing Materials, 2012, British Standards Institution, London, UK). The sealers had setting times and flow ability that was adequate for clinical use, satisfactory compressive strength and low solubility. Additional studies should be carried out with the purpose of decreasing the film thickness and to determine the ideal ratio of radiopacifying agents in Portland cement-based root canal sealers. © 2013 International Endodontic Journal.

Movilidad interprovincial en el Ecuador

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San Pedro Sula: cálculo y análisis de indicadores socio-económico y demográfico, con aplicación de ZONPLAN y REDATAM PLUS

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Avaliação do estado nutricional do micronutriente ferro em atletas femininas

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Número do tipo ponto flutuante com precisão estendida

Pós-graduação em Engenharia Mecânica - FEIS

Design de superfície: por uma visão projetual geométrica e tridimensional

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Política social y reformas estructurales: Cuba a principios del siglo XXI

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La economía del cambio climático en Centroamérica: impactos potenciales en los patrones intraanuales y espaciales del clima: serie técnica 2012

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La economía del cambio climático en Centroamérica: impactos potenciales en los ecosistemas: serie técnica 2012

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Enfoque alternativo para el análisis del desarrollo regional: estudio de la estrategia de crecimiento agrícola de la región No O.A. en el decenio 1970-80; versión preliminar

Versión ampliada del documento presentado al Seminario Bases para una Política Regional y de Asentamientos Humanos en la Argentina, organizado por el CEUR en diciembre de 1983