Influência do arcabouço hidroestratigráfico nas ocorrências de arsênio em águas subterrâneas ao longo do corredor termal do rio Uruguai (Argentina - Brasil - Uruguai)

The Thermal Corridor of Uruguay River is located in the triple border of Argentine, Brazil and Uruguay, and shows an intense economic thermal tourism activity, mainly based on groundwaters from Guarani Aquifer System (GAS). Recent studies have pointed out the occurrence of high concentrations of arsenic (>10 μg/L) in GAS groundwater in this area. The complex geological and hydrogeological framework in the area is associated to the Paraná Basin geological evolution south of the Assuncion-Rio Grande Arch; it encompass paleozoic marine sequences and continental sequences permian/eotriassic to mesozoic in age, which are covered by basaltic lavas of Serra Geral Formation. Iron oxide coatings have been described in sandstones of Buena Vista and Sanga do Cabral formations, which underlie GAS units. Arsenic occurrence is associated to sodium bicarbonate groundwater with pH values over 8.0. Arsenic is released to groundwater by desorption from iron oxides/hydroxides, as result of the higher pH of these waters, indicating that arsenic is released from the units that underlie GAS units. Increase in chromium and uranium concentrations are also related to high pH groundwaters, thus indicating special care on using groundwater from this region.

Producción de biomasa para biocombustibles líquidos: el potencial de América Latina y el Caribe

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Fecundidad diferencial en la República del Paraguay según condición de ruralidad y nivel de instrucción de la mujer

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República Argentina: análisis de la mortalidad por causas, con especial referencia a la Capital Federal y la Provincia de Buenos Aires

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Proyección de población 1970-2025: urbana y rural y económicamente activa por sexo y grupo de edad

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Los sistemas de información para la atención materno infantil y la planificación familiar: la situación en algunos países de América Latina y el Caribe

Proporciona un diagnóstico de la situación de los sistemas de información para la atención materno-infantil y planificación familiar en 9 países de la región, en donde las tasas de prevalencia anticonceptiva alcanzan al 50 por ciento o menos, a saber, Bolivia, Perú, Ecuador, Paraguay, República Dominicana, Honduras, Nicaragua, Dominica y Granada.

Hacia un perfil de la familia actual en Latinoamérica y el Caribe

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Tariffs and the Plano Real in Brazil

Includes bibliography

Los aranceles y el Plan Real de Brasil

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Hydroxyurea therapy in sickle cell anemia patients aids to maintain oral fungal colonization balance

Background: The aim of this study was to evaluate the frequency of Candida species and presence of lesions in the oral cavity of patients with sickle cell anemia (SS). Methods: The study included 30 patients diagnosed with sickle cell anemia and taking hydroxyurea for at least 90 days (SS/HU+); and 39 patients with sickle cell anemia and without hydroxyurea therapy (SS/HU-). Two control groups were constituted by healthy individuals matched to the test groups in age, gender, and oral conditions (C/HU+ for SS/HU+ and C/HU- for SS/HU-). Oral clinical examination and anamnesis were performed. Yeasts were collected by oral rinses and identified by API system. Antifungal susceptibility evaluation was performed according to the CLSI methodology. Data obtained for microorganisms counts were compared by Student's t test (SS/HU+ vs. C/HU+ and SS/HU- vs. C/HU-) using MINITAB for Windows 1.4. Significance level was set at 5%. Results: No oral candidosis lesions were detected. Significant differences in yeasts counts were observed between SS/HU- group and the respective control, but there were no differences between SS/HU+ and C/HU+. Candida albicans was the most prevalent species in all groups. Candida famata was observed both in SS and control groups. Candida dubliniensis, Candida glabrata, Candida krusei, Candida tropicalis, Candida pelliculosa, and Candida parapsilosis were observed only in SS groups. Most strains were susceptible to all antifungal agents. Conclusion: Hydroxyurea therapy seems to decrease candidal counts and resistance rate in sickle cell anemia patients. However, further studies should be conducted in the future to confirm this finding. Hydroxyurea therapy in sickle cell anemia patients maintains fungal species balance in oral cavity. © 2013 John Wiley & Sons A/S.

Venezuela: estudio de la fecundidad, haciendo especial enfasis para las mujeres casadas y no casadas, a partir de datos de las estadisticas vitales

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Brasil: la migracion interna en 1960

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Hacia un perfil de la familia actual en Latinoamérica y el Caribe

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