Ferruginous
Mostrando 1-12 de 28 artigos, teses e dissertações.
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1. More is not always better: responses of the endemic plant Vellozia nanuzae to additional nutrients
ABSTRACT Soil nutrients are one of the main drivers of plant species composition and distribution, mainly due to the role they play in plant survival and reproductive success. However, the nutritional requirements of plants inhabiting their native ecosystems are still poorly known. This is the case for most species of campo rupestre vegetation, which are fou
Acta Bot. Bras.. Publicado em: 2020-09
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2. Seed germination and dormancy break in Eragrostis polytricha, a native Brazilian grass species with potential for recovery of degraded lands
ABSTRACT Ferruginous Rocky Outcrops have high levels of species richness and endemism, but have been threatened by several anthropic actions, especially mining. Eragrostis polytricha, a common grass species in the vegetation of these outcrops, has shown promising features for use in the recovery of mining areas. However, in order to fully understand the spec
Acta Bot. Bras.. Publicado em: 2020-09
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3. Correlations of rock mass classifications applied to ferruginous caves
Abstract For the Brazilian iron ore mines, the presence of caves presents a challenge, since most of them are located within the ore deposit. The National Environment Commission (CONAMA 347 Resolution/2004) establishes that the speleological heritage, as well as its area of influence, cannot sustain irreversible environmental impacts. The physical integrity
REM, Int. Eng. J.. Publicado em: 2020-06
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4. And people already ask with malice: Where is ...
Abstract For the Brazilian iron ore mines, the presence of caves presents a challenge, since most of them are located within the ore deposit. The National Environment Commission (CONAMA 347 Resolution/2004) establishes that the speleological heritage, as well as its area of influence, cannot sustain irreversible environmental impacts. The physical integrity
REM, Int. Eng. J.. Publicado em: 2020-06
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5. X-ray Microtomography to Quantify Morphological Sandstones Properties
Abstract The sandstones of the Furnas Formation in the State of Paraná, south of Brazil, are located in regions with great importance due to the natural heritage found in the rocky forms and associated flora and fauna. This paper presents a detailed analysis of the internal structure of diverse sandstones of the Furnas Formation. X-ray microtomography allow
Braz. arch. biol. technol.. Publicado em: 12/08/2019
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6. Mammal tooth traces in a ferruginous cave in southeastern Brazil and their relevance to cave legal protection
Abstract: We describe the first occurrence of biogenic traces made by mammals within an iron formation cave located in the Serra da Ferrugem Ridge, in Southeastern Brazil. These bioerosions are tooth traces produced in boulders, walls and floor within the cave. The traces occur as sets of two or more grooves, which are highly variable in size. The grooves we
An. Acad. Bras. Ciênc.. Publicado em: 19/06/2019
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7. Frequency of leucism in a colony of Anoura geoffroyi (Chiroptera: Phyllostomidae) roosting in a ferruginous cave in Brazil
Resumo: Relatamos aqui o primeiro registro de frequência de leucismo em uma espécie de morcego Neotropical. Leucismo é uma anomalia na pigmentação da pele dos animais que consiste na perda total ou parcial da cor natural da espécie, podendo acometer partes ou todo o corpo do animal. Em um estudo de captura e marcação de indivíduos de uma população
Biota Neotrop.. Publicado em: 18/04/2019
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8. Reversibility of the Hardening Process of Plinthite and Petroplinthite in Soils of the Araguaia River Floodplain under Different Treatments
ABSTRACT Although ferruginous materials occur frequently in soils of tropical regions, information about the reversal of the hardening process of these materials is scarce. This study assessed the influence of different chemical treatments and periods of immersion on the reversibility of the hardening process of plinthite and petroplinthite in soils of the A
Rev. Bras. Ciênc. Solo. Publicado em: 02/07/2018
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9. Phytosociology of the herbaceous-subshrub layer of a rupestrian complex in Serra do Espinhaço, Brazil
ABSTRACT Rupestrian complexes of the Serra do Espinhaço are recognized for their high degree of biodiversity and endemism. However, environmental impacts, particularly from mining, have degraded these environments. The purpose of this study was to describe the herbaceous-subshrub communities that occur in quartzitic (QRC) and ferruginous (FRC) rupestrian co
Acta Bot. Bras.. Publicado em: 27/11/2017
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10. Cutaneous tuberculosis with nonreactive PPD skin test: a diagnostic challenge
The authors report a case of cutaneous tuberculosis in a 63-year-old female patient, who had an infiltrated, erythematous-ferruginous plaque of indurated aspect on her right leg and a nonreactive PPD skin test. Diagnosis was made by tissue culture and PCR of skin biopsy material. The treatment was p
An. Bras. Dermatol.. Publicado em: 2015-02
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11. Controle na distribuição das lateritas e saprolitos de alto teor no depósito de níquel laterítico do Jacaré, Distrito de Carajás, Brasil
The Jacaré world class nickel lateritic deposit (495Mt @ 1,19% Ni) is positioned about 52 Km NNE straight line from São Félix do Xingu/PA State - Carajás Mineral Province. The deposit occurs in essentially dunitic and gabbroic rocks magmatically layered with subordinated peridotites and pyroxenites levels. The saprolitic zones host the main Ni ores and t
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2011
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12. Florística, fitissociologia e relação solo-vegetação em campo rupestre ferruginoso do Quadrilátero Ferrífero, MG / Floristic, fitossociology and soil-vegetation relationship in ferruginous campo rupestre of the Iron Quadrangle, Brazil
O Quadrilátero Ferrífero esta localizado em uma área de transição entre dois grandes domínios morfoclimáticos brasileiros, confrontando em sua borda oeste com o Domínio do Cerrado e em sua borda leste com o Domínio dos Mares de Morros florestados. Esta transição também ocorre em relação aos biomas Cerrado e Mata Atlântica. A vegetação associ
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/07/2010