96 research outputs found
The use of piezocone tests for high-resolution stratigraphy of Quaternary sediment sequences in the Brazilian coast
Analysis of paternal lineages in Brazilian and African populations
The present-day Brazilian population is a consequence of the admixture of various peoples of very different origins, namely, Amerindians, Europeans and Africans. The proportion of each genetic contribution is known to be very heterogeneous throughout the country. The aim of the present study was to compare the male lineages present in two distinct Brazilian populations, as well as to evaluate the African contribution to their male genetic substrate. Thus, two Brazilian population samples from Manaus (State of Amazon) and Ribeirão Preto (State of São Paulo) and three African samples from Guinea Bissau, Angola and Mozambique were typed for a set of nine Y chromosome specific STRs. The data were compared with those from African, Amerindian and European populations. By using Y-STR haplotype information, low genetic distances were found between the Manaus and Ribeirão Preto populations, as well as between these and others from Iberia. Likewise, no significant distances were observed between any of the African samples from Angola, Mozambique and Guinea Bissau. Highly significant Rst values were found between both Brazilian samples and all the African and Amerindian populations. The absence of a significant Sub-Saharan African male component resulting from the slave trade, and the low frequency in Amerindian ancestry Y-lineages in the Manaus and Ribeirão Preto population samples are in accordance with the accentuated gender asymmetry in admixture processes that has been systematically reported in colonial South American populations
Consumo de frutas e hortaliças e as condições de saúde de homens e mulheres atendidos na atenção primária à saúde
Ambiente domiciliar e alterações do desenvolvimento em crianças de comunidade da periferia de São LuÃs - MA
Avaliação da atividade antimicrobiana de antissépticos e desinfetantes utilizados em um serviço público de saúde
Reproductive system of Eriocnema fulva Naudin (Melastomataceae), an endemic species of Minas Gerais state, SE Brazil
Infectivity of cysts of the ME-49 Toxoplasma gondii strain in bovine milk and homemade cheese
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