Resposta de celúlas odontoblastóides MDPC-23 irradiadas com LED de 630nm

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Estudo citogenético da região 7q11.23: a síndrome de Williams-Beuren

Pós-graduação em Pediatria - FMB

Notas de la CEPAL Nº 23

Cae Inversión Extranjera en América Latina y el Caribe Crisis del Café Impacta a Economías de la Región Columna de opinión de José Antonio Ocampo, Secretario Ejecutivo de la CEPAL: Desafíos para las Economías Pequeñas en la Era Global Precisiones: Políticas de Apoyo a las Pequeñas y Medianas Empresas (PYME) Indicadores Ventana al Asia Publicaciones recientes y calendario de eventos

ECLAC Notes Nº 23

Foreign Investment in Latin America and the Caribbean Falls Coffee Crisis Hurts the Region's Economies Op-ed by ECLAC's Executive Secretary, José Antonio Ocampo: Challenges for Small Economies in the Global Age Highlights: Policies for PYMEs Indicators Window on Asia Recent titles and calendar of events

Citotoxicidade direta e transdentinária da clorexidina sobre células odontoblastóides MDPC-23 e análise de sua atividade antimicrobiana in vitro

Pós-graduação em Ciências Odontológicas - FOAR

Determinação direta de selênio em água de coco e em leite de coco utilizando espectrometria de absorção atômica com atomização eletrotérmica em forno de grafite

Selenium is both essential and toxic to man and animals, depending on the concentration and the ingested form. Most fruits and vegetables are poor sources of selenium, but coconut can be a good selenium source. Samples were suspended (1 + 4 v/v) in a mixture of tertiary amines soluble in water (10% v/v CFA-C). This simple sample treatment avoided contamination and decreased the analysis time. The standard additions method was adopted for quantification. The action of the autosampler was improved by the presence of the amines mixture in the suspension. A Varian model AA-800 atomic absorption spectrometer equipped with a graphite furnace and a GTA 100 autosampler was used for selenium determination in coconut water and coconut milk. Background correction was performed by means of the Zeeman effect. Pyrolytically coated graphite tubes were employed. Using Pd as chemical modifier, the pyrolysis and the atomization temperatures were set at 1400 and 2200oC, respectively. For six samples, the selenium concentration in coconut water varied from 6.5 to 21.0 mg L^-1 and in coconut milk from 24.2 to 25.1 mg L^-1. The accuracy of the proposed method was evaluated by an addition-recovery experiment and all recovered values are in the 99.5^-102.3% range. The main advantage of the proposed method is that it can be directly applied without sample decomposition.