Carboniferous
Mostrando 1-12 de 16 artigos, teses e dissertações.
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1. An Overview of the Photocatalytic H2 Evolution by Semiconductor-Based Materials for Nonspecialists
The solar-to-chemical energy conversion is promising to tackle sustainability challenges toward a global future. The production of H2 from sunlight represents an attractive alternative to the use of carboniferous fossil fuels to meet our energy demands. In this context, the water splitting reaction photocatalyzed by semiconductors that can be excited under v
J. Braz. Chem. Soc.. Publicado em: 2020-02
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2. Morphology of the megaspore Lagenoisporites magnus (Chi and Hills 1976) Candilier et al. (1982), from the Carboniferous (lower Mississippian: mid-upper Tournaisian) of Bolivia
Abstract: The morphology and structure of megaspores assigned to Lagenoisporites magnus from the Toregua Formation, Retama Group, mid-upper Tournaisian of Bolivia were studied. The analysis was performed with light, fluorescence and scanning electron microscopy. Megaspores were laterally compressed and presented a spherical body with a proximal gula, of the
An. Acad. Bras. Ciênc.. Publicado em: 22/07/2019
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3. Pyrite utilization in the carboniferous region of Santa Catarina, Brazil - Potentials, challenges, and environmental advantages
Abstract The main coal seams explored in the coal region of Santa Catarina are Barro Branco (BB) and Bonito (BO). Owing to the association with the mineral matter, the tailings generated in the beneficiation are arranged in disposal areas, and subject to the generation of acid mine drainage (AMD). The objective of this study was to evaluate the use of pyrite
REM, Int. Eng. J.. Publicado em: 19/06/2019
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4. ROTEIRO GEOLÓGICO NOS MUNICÍPIOS DE CASTRO E TIBAGI, PR BRASIL.
The Campos Gerais region, Paraná, Brazil, holds unique geological, geomorphological e paleontological sets, which are target of numerous works and scientific researcher. This research present a geological and paleontological route using the outcrops occurring along existing roads in the municipalities of Castro and Tibagi, Parana State, Brazil. This roadmap
Publicado em: 2010
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5. Padrões diagenéticos em arenitos de sistemas de Sabk ha costeiros-eólicos: um estudo comparativo dos reservatórios Juruá da área de Urucu, Bacia de Solimões, AM
Coastal-eolian sabkha sandstones from different ages and basins show similar diagenetic patterns, which understanding is important for their evaluation as geochemical systems and as hydrocarbon reservoirs. The Carboniferous sandstones of the Juruá Formation (Solimões Basin) are one of the most important gas reservoirs of Brazil. The sandstones and interbed
Publicado em: 2010
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6. ESTUDO TAFONÔMICO DE ICNOFÓSSEIS ATRIBUÍVEIS À DIPLÓPODOS (MYRIAPODA) NO PARQUE MUNICIPAL DO VARVITO, MUNICÍPIO DE ITU (SÃO PAULO, BRASIL)
Os artrópodos constituem um grupo que possui um extenso registro fossilífero e hoje constitui o grupo mais abundante e diverso dos animais terrestres. Suas pistas fossilizadas, aliadas a estudos geológicos, fornecem dados importantes para estudos paleoecológicos. Através da análise da oscilação da densidade de icnofósseis ao longo dos horizontes do
Publicado em: 2010
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7. ENTOMOLOGICAL ASPECTS IN HOMOGENEOUS STANDS OF Acacia mearnsii De Wild / ASPECTOS ENTOMOLÓGICOS EM POVOAMENTOS HOMOGÊNEOS DE Acacia mearnsii De Wild
The proposed work aimed to investigate the entomological aspects in homogeneous stands of Acacia mearnsii (black wattle). It was considered: insects identification and damage quantification on seeds; treatment effect of seeds and the insecticides application on the aerial part of plants of direct sowing; the survey qualiquantitative by light traps mean; the
Publicado em: 2007
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8. Análise e correlação de seqüências de 3a ordem do Subgrupo Itararé (PC), entre a região de Sorocaba-Itapetininga, SP, e a região ao sul do Arco de Ponta Grossa, Bacia do Paraná, Brasil / 3rd order sequence stratigraphy of Itararé Subgroup (Neopaleozoic), within Sorocaba - Itapetininga (SP) and the south area of Ponta Grossa Arch, Parana Basin, Brazil
The Itararé Subgroup (Carboniferous-Permian) of the Paraná Basin of southeastern Brazil contains the thickest, most extensive and one of the longest records of late Paleozoic glaciation in all of the Gondwana supercontinent. In the studied area, situated between the cities of Sorocaba and Itapetininga, São Paulo State, this record is characterized by glac
Publicado em: 2007
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9. SeqÃÃncias siluro-devoniana e eocarbonÃfera da Bacia do ParnaÃba, Brasil, como anÃlogos para a explotaÃÃo de hidrocarbonetos
The present study was applied to understanding the similar hydrocarbon reservoirs on the Silurian, Devonian and Early Carboniferous sequences of the ParnaÃba Basin. The exposure investigated are located in the central area in the Piauà state. These outcrops are geologicaly inserted in the southeastern border of the ParnaÃba Basin. Three outcrops constitui
Publicado em: 2005
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10. As causas da ineficacia da legislação brasileira na proteção a saude e segurança do trabalhador na mineração carbonifera : aspectos de meio ambiente do trabalho
The mining is a strategic activity of great importance for the economical development of Brazil, however, it is potentially degrading, offering risks for the environment, collectivity and to the workers employed in the extraction of ores. The mining workers are exposed in physical, chemical, biological and psychological factors that should be eliminated, or
Publicado em: 2002
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11. Low atmospheric CO2 levels during the Permo- Carboniferous glaciation inferred from fossil lycopsids
Earth history was punctuated during the Permo-Carboniferous [300–250 million years (Myr) ago] by the longest and most severe glaciation of the entire Phanerozoic Eon. But significant uncertainty surrounds the concentration of CO2 in the atmosphere through this time interval and therefore its role in the evolution of this major prePleistocene glaciation. He
The National Academy of Sciences.
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12. Impact of a Permo-Carboniferous high O2 event on the terrestrial carbon cycle
Independent models predicting the Phanerozoic (past 600 million years) history of atmospheric O2 partial pressure (pO2) indicate a marked rise to approximately 35% in the Permo-Carboniferous, around 300 million years before present, with the strong potential for altering the biogeochemical cycling of carbon by terrestrial ecosystems. This potential, ho
The National Academy of Sciences.