Results 41 to 50 of about 20,400 (248)
Geologia USP. Série Científica, 2010 Diques e raros stocks máficos são comuns nos terrenos arqueanos de Goiás, onde ocorrem em enxames de 2.3 - 2.5 Ga nos complexos granito-gnáissicos (2.8 e 2.7 Ga) e nas seções estratigráficas inferiores de metakomatiitos e metabasaltos, mas eram ...
Hardy Jost, Jayme Estevão Scandolara
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Geologia USP. Série Científica, 2004 As rochas vulcano-sedimentares do orógeno do Rio Alegre ocorrem no SW do Cráton Amazônico e compreendem rochas vulcânicas máficas e ultramáficas, rochas sedimentares químicas, além de rochas intrusivas máficas a félsicas.
João Batista de Matos +4 more
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A evolução constitucional do direito de propriedade sobre os recursos minerais no Brasil
Contribuciones a las ciencias socialesO presente trabalho tem como objetivo estudar a atividade de mineração no Brasil à luz do constitucionalismo nacional, abordando em particular a construção histórica do direito de propriedade sobre os recursos minerais, explorando o olhar do direito ...
H. Viana +1 more
semanticscholar +1 more source
, 2017 A selecao de adicao mineral pozolânica para compor a matriz de cimento Portland requer determinacao previa de sua reatividade, o que e realizado diretamente, por meio do ensaio Chapelle modificado (NBR 15.895), ou indiretamente, pelo ensaio de ...
J. Filho +4 more
semanticscholar +1 more source
Hydrophysical Database for Brazilian Soils (HYBRAS) and Pedotransfer Functions for Water Retention
Vadose Zone Journal, Volume 17, Issue 1, Page 1-17, 2018., 2018 Core Ideas We propose a Hydrophysical Database for Brazilian Soils (HYBRAS). Data in HYBRAS comprise 445 soil profiles, with 1075 samples of Brazilian soils. We compared the accuracy of water retention estimates based on climate‐based PTFs. In general, the Brazilian PTFs performed better than the temperate models for HYBRAS.
Marta Vasconcelos Ottoni +4 more
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Geochemical characterization of surficial sediments from the southwestern Iberian continental shelf
Ciencias Marinas, 2005 The impact of trace elements (Ba, Nb, Zr, Y, Sr, Rb, Pb, As, Zn, Cu, Ni, Co, Cr, V, La, Ce, Nd, Sm, Eu, Tb, Yb and Lu) transported by the Guadiana, Tinto-Odiel and Guadalquivir rivers on sediments from the southwestern Iberian continental shelf has been
A Machado +5 more
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Case Reports in Surgery, Volume 2014, Issue 1, 2014., 2014 Sialolithiasis is a pathologic condition that affects 60 million people per year, which is caused by the presence of calcified structures, named sialoliths, inside the salivary glands and their salivary ducts. Despite the large incidence of sialolithiasis, its etiology is still unknown.
Ademir Franco +7 more
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Estimating recharge rates with baseflow separation in the Ibicuí Watershed (South America)
Revista Águas Subterrâneas, 2016 This study aims to estimate the groundwater recharge rates in the Ibicuí Watershed, in the state of Rio Grande do Sul, using baseflow separation method. The watershed’s main aquifer is the Guarani Aquifer System, in its confined areas (West) and outcrop (
Camila Dalla Porta Mattiuzi +3 more
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Molecular Characterization of TP53 Gene in Human Populations Exposed to Low‐Dose Ionizing Radiation
BioMed Research International, Volume 2013, Issue 1, 2013., 2013 Ionizing radiation, such as that emitted by uranium, may cause mutations and consequently lead to neoplasia in human cells. The TP53 gene acts to maintain genomic integrity and constitutes an important biomarker of susceptibility. The present study investigated the main alterations observed in exons 4, 5, 6, 7, and 8 of the TP53 gene and adjacent ...
Igor Brasil-Costa +9 more
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Lineações minerais em porfiroblastos
Revista Brasileira de Geociências, 2009 The study of mineral lineations has been of fundamental importance in the comprehension of tectonic evolution in orogenetic belts. However, in polydeformated areas, while the newest lineation’s orientation can be found, the oldest lineations tend to be obliterated by the newest deformation events.
Frederico Guilherme Guaraldo de Andrade +1 more
openaire +3 more sources