Mined Areas
Mostrando 13-22 de 22 artigos, teses e dissertações.
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13. The uses of ants as bioindicators in the environmental monitoring of mined sites revegetation. / O uso de formigas como bioindicadores no monitoramento ambiental de revegetação de áreas mineradas.
As atividades de mineração são o suporte do crescimento e do desenvolvimento econômico da sociedade moderna. Por outro lado, estas atividades são causadoras de consideráveis modificações ambientais. Assim, faz-se necessário o desenvolvimento da Avaliação de Impacto Ambiental, que vise a definição de planos de controle ambiental que garanta a mit
Publicado em: 2007
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14. CobMiner - Mineração de Padrões Arborescentes com Restrições
Most work on pattern mining focus on simple data structures like itemsets or sequences of itemsets. However, a lot of recent applications dealing with complex data like chemical compounds, protein structure, social network, XML and Web Log databases, require much more sophisticated data structures (trees or graphs) for their specification. Here, interesting
Publicado em: 2007
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15. ATIVIDADES EXTRATIVAS MINERAIS E SEUS COROLÁRIOS NA BACIA DO ALTO RIBEIRÃO DO CARMO: DA DESCOBERTA DO OURO AOS DIAS ATUAIS
The discovery of gold in the headboards of Ribeirão of Carmo in the end of the 18th Century brought a notable migratory flow for the area, originating several villages, among the ones which those that originated the current towns of Ouro Preto and Mariana. In more than three hundred years of occupation, the area passed by an alternation of periods with prev
Publicado em: 2006
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16. Effect of both host plant and mating disruption technique on the reproductive behavior of Leucopteta coffeella (Lepidoptera: Lyonetiidae) / Efeito da planta hospedeira e da técnica da confusão sexual no comportamento reprodutivo de Leucoptera coffeella (Lepidoptera: Lyonetiidae)
The present thesis had the aim to study the importance of the host plant to the reproductive behavior of L. coffeella. At first, the following aspects were evaluated: (i) the effect of the reproductive condition of females in response to host plant volatiles; (ii) if mating proportion, initiation time and copulation duration are affected by the presence of v
Publicado em: 2006
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17. Avaliação da recuperação da área degradada pela mineração de argila através do plantio de Mimosa scabrella Benth(Fabaceae), sob duas técnicas de preparação do solo, Doutor Pedrinho, SC
The reclamation of degraded areas is a set of idealized and executed actions carried out by specialists of the most different areas of the human knowledge seeking to provide the re-establishment of balanced and sustainable conditions existing previouly to the degradation of a natural system. The study area is a mine of refractory clay of 96,14 ha that has be
Publicado em: 2005
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18. Mechanical tillage of mining degraded areas at Jamari National Forest (Rondonia - BR) / Mecanização no preparo de solo em areas degradadas por mineração na Floresta Nacional do Jamari (Rondonia-BR)
The usage of a nation s natural resources directly implies the manipulation of natural environments on the terrestrial surface. In this scenario, estimates indicate that mining contributes to one percent of the degradation of the soils of the planet. It is observable that, although it seems to be a small number, this percentage denotes a high intensity of de
Publicado em: 2005
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19. Revegetação de áreas mineradas: estudo dos procedimentos aplicados em minerações de areia. / Mining revegetation: methods and techniques used in sand mines.
This dissertation analyses the methods and techniques used to revegetate areas of sand mines and assess the results obtained. In the first phase of study, reclamation activities of five typical sand mines were observed. In general, revegetation in these mines plays a fundamental role in mined areas reclamation. Two mines were selected for a more detailed ass
Publicado em: 2003
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20. Dinâmica da regeneração natural de espécies arbóreas e arbustivas no sub-bosque de povoamento de Mimosa scabrella Bentham, em área minerada, em Poços de Caldas-MG / Dynamics of natural regeneration of tree and shrub community in understory of stands of Mimosa scabrella Bentham in mined area, Poços de Caldas, Brazil
In 1982/1983 as part of its mine rehabilitation strategy, ALCOA Alumínio S.A. hydroseeded herbaceous species and planted tree seedlings of Mimosa scabrella Bentham in Retiro-Branco bauxite mining site. In 1997, 19 sample plots of 50m2 were implanted in this area for initial characterization of natural regeneration process. Sampling sufficiency and ideal siz
Publicado em: 2002
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21. A poluição atmosférica por material particulado na mineração a céu aberto. / Atmospheric pollution by particulate matter in the open pit mining.
Atmospheric pollution aspects were analyzed. Two types of ambients were selected for study: a mining ambient and an urban ambient. To obtain a preliminary evaluation of the quality of the air in these ambients a sampling program was accomplished for each area. Two basic points were studied: the concentration of the total suspended particulates and the chemic
Publicado em: 1999
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22. Search and Discovery Strategies for Biotechnology: the Paradigm Shift
Profound changes are occurring in the strategies that biotechnology-based industries are deploying in the search for exploitable biology and to discover new products and develop new or improved processes. The advances that have been made in the past decade in areas such as combinatorial chemistry, combinatorial biosynthesis, metabolic pathway engineering, ge
American Society for Microbiology.