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Mostrando 1-12 de 28 artigos, teses e dissertações.
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1. Relief Position and Soil Properties under Continuous Banana Cropping in Subhumid Climate in Northeast Brazil
ABSTRACT Sequences of thick and eroded soils in hills surfaces are cultivated with banana since the beginning of the last century in the Northeast of Pernambuco (PE), Brazil. Measurements of soil properties depending on soil slope under intensive agricultural cultivation are limited mostly as the pedogenetic approach. This study aimed to identify the dominan
Rev. Bras. Ciênc. Solo. Publicado em: 09/09/2019
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2. Análisis arqueométrico de pigmentos del sitio arqueológico Tambo Colorado por difracción de rayos X sincrotrón
ABSTRACT Despite the exceptional architecture and polychromy of archaeological site of Tambo Colorado, there has been no conservation work or in the architectural structures of raw earth, nor on the surfaces. These jobs require a proper understanding of the state of conservation of the site architecture and the analysis of the materials used. With this purpo
Matéria (Rio J.). Publicado em: 20/05/2019
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3. Nests of “caba-leão” wasps (Sceliphron sp., Sphecidae) used in traditional medicine by riverine communities of the Jaú and Unini Rivers, Amazon, Brazil: ethnopharmacological, chemical and mineralogical aspects
ABSTRACT This research contributes to the study of substances present in homemade remedies used by the riverine communities of the Amazon, which are the result of insect–mineral–vegetable oil-interaction. The results of the analyses show the main components (inorganic and organic components) of the “caba-leão” wasps nests (Sceliphron sp., Sphecidae)
Rev. bras. farmacogn.. Publicado em: 2018-06
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4. Cordão Formation: loess deposits in the southern coastal plain of the state of Rio Grande do Sul, Brazil
ABSTRACT Loess consists of silt-dominated sediments that cover ~10% of the Earth's surface. In southern South America it occurs in Argentina, Bolivia, Paraguay and Uruguay, and its presence in southern Brazil was never studied in detail. Here is proposed a new lithostratigraphic unit, Cordão Formation, consisting of loess deposits in the southern Brazilian
An. Acad. Bras. Ciênc.. Publicado em: 2016-12
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5. Genesis and Classification of Soils Containing Carbonates in a Toposequence of the Bambuí Group
ABSTRACT The Bambuí Group, formed from siliciclastic sediments deposited on an extensive epicontinental platform at the end of the Neoproterozoic era, is characterized by limestones with fine to very fine texture. Limestone-derived soils in the southeast of Tocantins state, Brazil, are less notorious than similar soils in other regions of Brazil and their c
Rev. Bras. Ciênc. Solo. Publicado em: 29/08/2016
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6. Genesis and Classification of Soils Containing Carbonate on the Apodi Plateau, Brazil
ABSTRACT Information is scarce on the genesis and classification of soils derived from calcareous rocks in the Northeastern region of Brazil. This study describes the morphological, physical, chemical, mineralogical, and micromorphological properties of four soil profiles (P1-P4) located in the Apodi Plateau. A pedogenesis hypothesis and soil classification,
Rev. Bras. Ciênc. Solo. Publicado em: 31/05/2016
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7. Estudio estructural de arcillas de Chulucanas por difracción de rayos-X y método de Rietveld
Results of measures of X-ray diffraction showed a sequence of chemical and structural changes such as dehydration, decomposition and formation of new phases in clays subjected to gradual increases in temperature. The components of the samples were determined identifying Ca-montmorillonite, vermiculite, muscovite, kaolinite, chlorita, illite, quartz and albit
Matéria (Rio J.). Publicado em: 2014-06
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8. Rb-Sr systematics of holocene pelitic sediments and their bearing on whole-rock dating
In many cases, when dealing with argillaceous fine-grained sedimentary rocks, the isotopic ages obtained from Rb–Sr whole-rock isochron calculations are of geological significance, despite the fact that the initial conditions of Sr isotopic homogenization are not fulfilled. To explain this, a mechanical mixing during deposition has been suggested, leading
Publicado em: 2011
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9. Efeito da adição de feldspato e/ou resíduo de caulin em formulações à base de argila ilítica
A indústria de cerâmica vermelha do Piauí é bem desenvolvida e se destaca no contexto nacional pela qualidade técnica de seus produtos. Já a indústria de revestimento pouco se desenvolveu, visto que o estado possui uma única empresa que produz revestimento de base argilosa vermelha. Esta tese tem por objetivo utilizar a massa básica predominantement
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 16/11/2010
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10. Argilominerais em solos de manguezais da costa brasileira / Clay minerals in mangrove soils of Brazilian coast
Mangroves are transitional ecosytems between continental and marine environments. Its widely distributed along Brazilian coast under great variability of climatic, oceanographic, geological and geomorphological conditions. Its soil mineralogy has a relevant role in the pedogenic processes and biogeochemical behavior of nutrients and potential inorganic and o
Publicado em: 2010
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11. Análise e avaliação dos problemas existentes na fachada de arenito do Museu Júlio de Castilhos, Porto Alegre, RS
The Júlio de Castilhos museum of Porto Alegre, formerly used as residence, was built in 1877 by a military engineer Catão Roxo. This building is one of the few examples of urban architecture from the last part of the nineteenth century. Its façade is covered by arenitic and granitic rocks quarried near the city. The covering shows the effects of weatherin
Publicado em: 2010
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12. Análise geoquímica dos sedimentos de fundo do Arroio do Salso, Porto Alegre-RS-Brasil
This paper presents the results of a study performed on bedload samples from the Salso Creek in the Porto Alegre City (Rio Grande do Sul State) rural area where agricultural and pastoral activities are carried out within urban areas. Sediment sampling took place on the 16th September 2001 (winter) and 21th January 2002 (summer), at five sites along the Salso
Publicado em: 2010