Results 31 to 40 of about 33,626 (171)
Revista Brasileira de Ciência do Solo, 2010 Morphologically differentiated Spodosols usually occur in the Coastal Plain of the South of Bahia and North of Espírito Santo. They are found in profiles known as "muçungas", i.e. sandy soils that accumulate water. In these areas, two kinds of Spodosols,
Aline Pacobahyba de Oliveira +5 more
doaj +1 more source
Novos paradigmas na educacão online com a aprendizagem aberta [PDF]
, 2007 This paper aims to discuss important concepts related to online education which bring a new educational paradigm: open learning through free learning materials and technologies.
Okada, Alexandra
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, 2022 A Formação Barreiras, de origem sedimentar, se estende ao longo do litoral brasileiro e tem sido objeto de diversas pesquisas, devido sua extensão e variabilidade espacial, além de se encontrar numa região intensamente povoada e de elevado interesse econômico.
Freire, Lisyanne Vasconcelos +4 more
openaire +1 more source
Rice Husk Ash Modified with Vanadium Pentoxide
Orbital: The Electronic Journal of Chemistry, 2017 Rice husk collected in Barreiras City, Bahia, Brazil was converted to rice husk ash (RHA) by acidic or basic leaching, followed by calcination. The resulting RHA was modified with vanadium pentoxide (2, 5, or 10 mass% of V2O5).
Isaias Alves Rodrigues +4 more
doaj +3 more sources
Evolution of the Post-Barreiras Sediments in the coastal zone of São Luís Basin, Maranhão, Brazil [PDF]
Boletim do Museu Paraense Emílio Goeldi. Ciências Naturais, 2013 The Post-Barreiras Sediments have been poorly studied,despite their interest for reconstituting sea-level fluctuations and the tectonic history in the Quaternary.
Dilce de Fátima Rossetti. +2 more
doaj
Gamma radiation of the street corners from South zone of Natal city, Rio Grande do Norte, Brazil
Brazilian Journal of Radiation Sciences, 2022 This research had the objective of studying the absorbed dose of the street corner intersections from the South zone of Natal city, Brazil. This city grew up on dune lands, on siliciclastic rocks from Barreiras Formation, these dunes are quartz-sand and ...
Thomas Ferreira da Costa Campos +4 more
doaj +1 more source
Influência da posição na encosta na manifestação do caráter coeso em solos da Formação Macacu, no Estado do Rio de Janeiro. [PDF]
, 2015 A coesão de alguns horizontes de certos solos interfere diretamente no crescimento de plantas, provocando redução da profundidade efetiva, do volume de raízes e da emergência de plântulas, em decorrência da redução da disponibilidade de água e ar no solo.
CURCIO, G. R. +4 more
core +1 more source
Iron oxides in plinthic soils on sedimentary deposits in northeastern Brazil
Revista Brasileira de Ciência do Solo, 1999 This study was conducted to examine the distribution and nature of Fe oxides in plinthic soils on the sediments of Barreiras Group (in the state of Piauí) and Itapecuru Formation (in the state of Maranhão) in Northeastern Brazil.
R. J. Heck, A. R. Mermut, M. C. Santos
doaj +1 more source
Grupos estratégicos: uma ferramenta estratégica [PDF]
, 2002 Comunicação apresentada nas XII Jornadas Luso-Espanholas de Gestão Científica na Universidade Da Beira InteriorDesde os anos 70 do século XX tem sido desenvolvida a teoria dos grupos estratégicos, assistindo-se nas décadas de 80 e 90 a uma autêntica ...
Ribeiro, Joaquim Silva +1 more
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Late Burdigalian (Miocene) age for pectinids (Mollusca-Bivalvia) from the Pirabas Formation (northern Brazil) derived from Sr-isotope (87 Sr/86 Sr) data [PDF]
, 2017 The faunas of the highly fossiliferous Pirabas Formation belong to the southern part of the biogeographical unit known as "Neogene Tropical America". This unit developed prior to the closure of the Central American Seaway by the Isthmus of Panama.
Del Río, CJ +4 more
core +1 more source