Caves
Mostrando 1-12 de 88 artigos, teses e dissertações.
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1. SALITRE: O PRODUTO QUÍMICO ESTRATÉGICO NO PASSADO DO BRASIL
Saltpeter demanded for a long-time strategic attention in view of its importance in the form of gunpowder by the governments of many nations. The sources of this mineral in Brazil were almost always associated to the soil in caves, which was extracted because of a limited amount of that precious salt. The first references pointed out that saltpeter was first
Quím. Nova. Publicado em: 2021-04
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2. 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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3. 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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4. A new species of Oiovelia from Colombia, with notes for other three species of South American Veliinae (Heteroptera: Gerromorpha: Veliidae)
Abstract The new species Oiovelia shepardi is described based on macropterous specimens from the departments of La Guajira and Antioquia in northwestern Colombia, and is compared to its presumed closest relative. The female of Paravelia cunhai Rodrigues & Moreira, 2016 and the male of P.polhemusi Rodrigues, Moreira, Nieser, Chen & Melo, 2014 are described fo
Pap. Avulsos Zool.. Publicado em: 03/10/2019
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5. A compilation of longevity data in decapod crustaceans
Abstract Longevity information was collected from 219 literature sources for 244 decapod crustaceans, representing 1.7% of species, 4.8% of genera and 30% of families. Reliable methods of age determination (laboratory rearing, mark-recapture method, growth models, lipofuscin method) revealed longevities from 0.1 to 72 years, corresponding to a 700-fold diffe
Nauplius. Publicado em: 16/09/2019
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6. Soft-bodied benthic algae in pristine Brazilian streams: from acid to karst
ABSTRACT This study evaluated soft-bodied benthic algae from seven streams located in protected areas of central Brazil (Parque Nacional de Brasília, Parque Nacional da Chapada dos Veadeiros and Parque Estadual de Terra Ronca), and related them to abiotic factors. We addressed the following questions: A) how algal community structure in Cerrado streams is i
Acta Bot. Bras.. Publicado em: 12/09/2019
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7. Licófitas e samambaias do Parque Estadual Monte Alegre (PEMA), Pará, Brasil
RESUMO O Cerrado é um importante domínio fitogeográfico brasileiro, uma vez que abrange porcentagem considerável do território nacional. Nesse domínio há estimativas de 241 a 284 espécies de samambaias e licófitas, apesar disso, há poucos trabalhos ressaltando-as nesse ambiente, assim o objetivo desse estudo foi realizar um levantamento das plantas
Hoehnea. Publicado em: 12/09/2019
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8. To boldly go: on invasive goblin spiders in Brazil (Araneae, Oonopidae)
RESUMO Doze aranhas consideradas não-nativas da família Oonopidae são registradas em áreas urbanas no Brasil: Brignolia dasysterna Platnick, Dupérré, Ott & Kranz-Baltensperger, 2011, B. parumpunctata (Simon, 1893), Triaeris stenaspis Simon, 1892, Ischnothyreus peltifer (Simon, 1892), I. velox Jackson, 1908, Opopaea concolor (Blackwall, 1859), O. desert
Iheringia, Sér. Zool.. Publicado em: 09/09/2019
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9. High cellulolytic activities in filamentous fungi isolated from an extreme oligotrophic subterranean environment (Catão cave) in Brazil
Abstract Abstract: Isolation and screening of new fungal strains from extreme and understudied environments, such as caves, is a promising approach to find higher yields enzyme producers. Cellulolytic fungal strains isolated from a Brazilian cave were evaluated for their enzymatic production after submerged (SmF) and solid-state fermentation (SSF). After SmF
An. Acad. Bras. Ciênc.. Publicado em: 29/07/2019
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10. Physical stability of iron ore caves: geomechanical studies of a shallow underground cave in SE Brazil
Abstract Caves hosted in iron formations are attracting considerable interest due to their scientific and environmental value. Some of these caves are located in or near iron ore mine sites, which represent an important source of income to Brazil. However, the Brazilian legislation requires speleological studies that currently have an impact upon ore reserve
REM, Int. Eng. J.. Publicado em: 2019-06
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11. Analysis of bacterial communities and characterization of antimicrobial strains from cave microbiota
Abstract In this study for the first-time microbial communities in the caves located in the mountain range of Hindu Kush were evaluated. The samples were analyzed using culture-independent (16S rRNA gene amplicon sequencing) and culture-dependent methods. The amplicon sequencing results revealed a broad taxonomic diversity, including 21 phyla and 20 candidat
Braz. J. Microbiol.. Publicado em: 2018-06
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12. Differences between caves with and without bats in a Brazilian karst habitat
ABSTRACT. Since bats shelter in roosts during their period of diurnal inactivity, the quality and availability of roosts are important aspects of their ecology. Karst areas have great potential for the availability of day roosts, since they form caves, which serve as bat shelters. Here we characterize the caves used by bats in a preserved karst area of South
Zoologia (Curitiba). Publicado em: 19/10/2017