Results 21 to 30 of about 25,260 (207)

Hydrophysical Database for Brazilian Soils (HYBRAS) and Pedotransfer Functions for Water Retention

open access: yesVadose 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
wiley   +1 more source

Petrografia, geoquímica e geocronologia das rochas do orógeno Rio Alegre, Mato Grosso: um registro de Crosta oceânica mesoproterozóica no SW do Cráton Amazônico

open access: yesGeologia 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
doaj   +1 more source

Evaporitos como recursos minerais [PDF]

open access: yesRevista Brasileira de Geofísica, 2000
Evaporites are sedimentary rocks commonly formed in sedimentary environments of low terrigenous input, under arid climate where the evaporation rates are high enough for the formation of brines from which the evaporitic sediments are generated. The economic potential of these rocks is enormous, and halite, the commonly consumed salt, is one of the most
Silva, Maria A. M. da   +2 more
openaire   +3 more sources

Massive Submandibular Sialolith: Complete Radiographic Registration and Biochemical Analysis through X‐Ray Diffraction

open access: yesCase 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
wiley   +1 more source

Molecular Characterization of TP53 Gene in Human Populations Exposed to Low‐Dose Ionizing Radiation

open access: yesBioMed 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
wiley   +1 more source

Águas minerais de Santa Catarina [PDF]

open access: yes, 2000
Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico.Esta pesquisa representa uma análise hidrogeológica das águas minerais de Santa Catarina. Em função de suas características físico-químicas, modo de ocorrência e relações
Coitinho, João Batista Lins
core  

Estimation of recharge of the Guarani Aquifer system based on the application of the water-table fluctuation method in the Ibicui River-RS

open access: yesRevista Águas Subterrâneas, 2017
The estimation of groundwater recharge is determinant for the sustainable groundwater management. The recharge can be estimated using different methods according to the characteristics of the studied area, the spatial and temporal scales and data ...
Flora Würth Simon   +3 more
doaj   +1 more source

Distribuição dos minerais pesados ao longo do curso inferior do rio Itajaí-Açu/SC e sua correlação sedimentar com a planície costeira, praia e plataforma continental interna adjacente [PDF]

open access: yes, 2007
Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Filosofia e Ciências Humanas. Programa de Pós-Graduação em Geografia.Os minerais pesados são compostos químicos detríticos oriundos de rochas ígneas, metamórficas e sedimentares ...
Souza, Denis Roberto de
core  

Recursos minerais do Brasil

open access: yesTerrae Didatica, 2021
Esta revisão objetiva elaborar diretrizes para aumentar a atratividade de investimentos no setor mineral brasileiro. Fundamenta-se em pesquisa bibliográfica e documental, consultas a diversas órgãos de governo e instituições privadas, visando diagnosticar a situação atual, diante das potencialidades e deficiências.
Cassio Roberto da Silva   +1 more
openaire   +1 more source

The Stability of Manganese Oxides Under Laser Irradiation During Raman Analyses: II. Layer Structures

open access: yesJournal of Raman Spectroscopy, Volume 56, Issue 10, Page 1072-1088, October 2025.
Manganese oxides are important geomaterials with diverse technological applications. Here, we investigate the behaviour of the most common Mn oxides with layer structures under irradiation by a 532‐nm laser, with intensity ranging from 23 µW/µm2 to 36.8 mW/µm2.
Simone Bernardini   +4 more
wiley   +1 more source

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