No abstract

In the coastal multilayer aquifer system of a highly urbanized southern city (Recife, Brazil), where groundwaters are affected by salinization, a multi-isotope approach (Sr, B, O, H) was used to investigate the sources and processes of salinization. The high diversity of the geological bodies, built since the Atlantic opening during the Cretaceous, highly constrains the heterogeneity of the groundwater chemistry, e.g. Sr isotope ratios, and needs to be integrated to explain the salinization processes and groundwater pathways. A paleoseawater intrusion, most probably the 120 kyB.P. Pleistocene marine transgression, and cationic exchange are clearly evidenced in the most salinized parts of the Cabo and Beberibe aquifers. All (87)Sr/(86)Sr values are above the past and present-day seawater signatures, meaning that the Sr isotopic signature is altered due to additional Sr inputs from dilution with different freshwaters, and water-rock interactions. Only the Cabo aquifer presents a well-delimitated area of Na-HCO3 water typical of a freshening process. The two deep aquifers also display a broad range of B concentrations and B isotope ratios with values among the highest known to date (63-68.5‰). This suggests multiple sources and processes affecting B behavior, among which mixing with saline water, B sorption on clays and mixing with wastewater. The highly fractionated B isotopic values were explained by infiltration of relatively salty water with B interacting with clays, pointing out the major role played by (palaeo)-channels for the deep Beberibe aquifer recharge. Based on an increase of salinity at the end of the dry season, a present-day seawater intrusion is identified in the surficial Boa Viagem aquifer. Our conceptual model presents a comprehensive understanding of the major groundwater salinization pathways and processes, and should be of benefit for other southern Atlantic coastal aquifers to better address groundwater management issues.

No abstract

the development of the neurolinguistic system for speech fluency, in terms of speech disruptions, seems to stabilize itself during the first years of life, presenting no alterations during the life span. Indexes of speech rate present variations in the age groups, indicating patterns of acquisition, development, stabilization and degeneration.

No abstract

In the Amazon basin, intense precipitation recycling across the forest significantly modifies the isotopic composition of rainfall (δ18O, δD). In the tropical hydrologic cycle, such an effect can be identified through deuterium excess (dxs), yet it remains unclear what environmental factors control dxs, increasing the uncertainty of dxs‐based paleoclimate reconstructions. Here we present a 4‐year record of the isotopic composition of rainfall, monitored in the northwestern Amazon basin. We analyze the isotopic variations as a function of the air mass history, based on atmospheric back trajectory analyses, satellite observations of precipitation upstream, leaf area index, and simulated moisture recycling along the transport pathway. We show that the precipitation recycling in the forest exerts a significant control on the isotopic composition of precipitation in the northwestern Amazon basin, especially on dxs during the dry season (r = 0.71). Applying these observations to existing speleothem and pollen paleorecords, we conclude that winter precipitation increased after the mid‐Holocene, as the expansion of the forest allowed for more moisture recycling. Therefore, forest effects should be considered when interpreting paleorecords of past precipitation changes.

No abstract

OBJETIVO: investigar a distribuição dos fonoaudiólogos no estado de Minas Gerais, sua inserção no SUS e as variações geográficas dessa distribuição e suas desigualdades. MÉTODO: análise dos Cadernos de Informações de Saúde dos 853 municípios do estado de Minas Gerais referentes a 2009, disponíveis no Sistema de Informações em Saúde brasileiro, o DATASUS. Foram pesquisados os indicadores: população municipal, número total de fonoaudiólogos da rede SUS e da rede privada e número médio de fonoaudiólogos (SUS e rede privada) por mil habitantes. RESULTADOS: a análise dos dados revelou a presença de 1.733 fonoaudiólogos atuando no estado em 2009. Destes, 67,8% atendiam à rede SUS. Dos 853 municípios, 505 (59%) não possuíam o profissional fonoaudiólogo no período investigado. Observou-se que entre as 13 macrorregiões estaduais as regiões Centro-Sul e Sul apresentaram a melhor média de fonoaudiólogos por 10.000 habitantes (1/10.000) e as regiões Norte de Minas e Nordeste, as piores: 0,16 e 0,05/10.000, respectivamente. Observou-se a presença de 0,58 fonoaudiólogos/10.000 habitantes disponíveis na rede SUS e 0,86 fonoaudiólogos/10.000 atendendo à rede privada e ao SUS no estado. CONCLUSÃO: a inclusão de fonoaudiólogos na assistência à saúde estadual ainda é deficitária, sendo observada grande disparidade na distribuição dos profissionais. É notório o estrangulamento da assistência fonoaudiológica no SUS em Minas Gerais, visto que para cada 17.000 mineiros existia somente um fonoaudiólogo no SUS estadual em 2009. Ressalta-se a necessidade de uma mobilização dos profissionais e dos gestores de saúde para garantir a integralidade da atenção à saúde no estado.