Carbon Fixation
Mostrando 13-24 de 407 artigos, teses e dissertações.
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13. Volumetria, calorimetria e fixação de carbono em florestas plantadas com espécies exóticas e nativas usadas como fonte energética no Polo Gesseiro do Araripe PE. / Volumetry, calorimetry and carbon fixation in forests planted with exotic and native species used as energy source in the Gypsum Pole of Araripe -PE.
In the industrial and commercial sectors of the Araripe Region in Pernambuco, the use of fire wood is mainly directed to the processes of calcination and production of gypsum in different technologies. Thus, this study aimed to find alternatives to supply the demand of firewood in the Gypsun Pole of Araripe in Pernambuco through the implementation of the for
Publicado em: 2009
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14. Caracterização fenotípica e produção de biopolímeros por bactérias isoladas de nódulos de guandu [(Cajanus cajan (L.) Millsp.]. 2009, 166f. / Phenotypic characterization and biopolymers production by bacteria isolated from pigeonpea [Cajanus cajan (L.) Millsp.] root nodules. Seropédica: UFRRJ, 2008. 166p.
The biological nitrogen fixation (BNF) is a natural process carried out by prokaryotes collectively called diazotrophs. Among the diverse microorganisms able to fix the atmospheric nitrogen, stand out those capable of set up mutualistic associations with legume plants in specialized structures called nodules. Thus the search for microorganisms able to establ
Publicado em: 2009
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15. Isotopical analysis of free range and wild capybara (Hydrochoerus hydrochaeris) tissues / Análise isotópica de diferentes tecidos de capivara (Hydrochoerus hydrochaeris) de criadouro e vida livre
Based on isotopic methodology, this study developed a dietary analysis of free range and wild capybara, using different tissues (muscle, blood, nail and hair), in order to provide information for the species management and verify possible alternative tissues that reflect the values of the consumption source. It was analyzed carbon (C) and nitrogen (N) stable
Publicado em: 2009
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16. Algoritmo regional de monitoramento da taxa de fixação de carbono pelas florestas tropicais da América do Sul / Regional algorithm for monitoring the carbon assimilation by tropical forests of the South America
The most likely scenario for the next decades presents strong modifications in the global environment, including increase of the atmospheric concentration of CO2 and other trace gases, climate change and intensification of the impacts caused by the man s action. These changes may cause important modifications in the composition, structure and distribution of
Publicado em: 2008
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17. NUTRIENT CYCLING AND GRAIN CROP YIELD IN CROPPING SYSTEMS UNDER NO-TILLAGE / CICLAGEM DE NUTRIENTES E PRODUTIVIDADE DE GRÃOS EM SUCESSÕES DE CULTURAS SOB SISTEMA PLANTIO DIRETO
The no-tillage adoption combined with the presence of crop residues on soil surface and minimum soil disturbance increase the soil organic matter content, that associated with broadcast fertilization, change the nutrient dynamic and its relationship with plant nutrition. This study was carried out in a long term experiment (1997 to 2007) in Cruz Alta (RS) ai
Publicado em: 2008
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18. Production potential and biological nitrogen fixation efficiency of five elephant-grass genotypes (Pennisetum purpureum Schum.), for use as alternative energy source. / Potencial produtivo e eficiência da fixação biológica de nitrogênio de cinco genótipos de capim elefante (Pennisetum purpureum Schum.), para uso como fonte alternativa de energia.
Elephant grass (Pennisetum purpureum Schum.) is one of the grasses known for its great capacity for dry matter accumulation, having also other characteristics favorable for the energy production. The objective of this study was to select elephant grass genotypes for high biomass yield, nitrogen accumulation and contribution of Biological Nitrogen Fixation (B
Publicado em: 2008
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19. Estimativa da área e do tempo de permanência da vegetação secundária na amazônia legal por meio de imagens LANDSAT/TM
- Secondary vegetation, formed by natural regeneration of areas that are deforested and later abandoned, have many functions relevant to the ecology of the landscape in which it is embedded such as fixation of atmospheric carbon, maintenance of the biodiversity and the connection among forest remnants and restoration of soil fertility. The latter function is
Publicado em: 2008
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20. Citrus plastid-related gene profiling based on expressed sequence tag analyses
Plastid-related sequences, derived from putative nuclear or plastome genes, were searched in a large collection of expressed sequence tags (ESTs) and genomic sequences from the Citrus Biotechnology initiative in Brazil. The identified putative Citrus chloroplast gene sequences were compared to those from Arabidopsis, Eucalyptus and Pinus. Differential expres
Genetics and Molecular Biology. Publicado em: 2007
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21. Soil carbon and nitrogen stocks and fertility in areas in recuperation with leguminous trees and on shifting cultivation system area with high productivity. / Estoque de carbono, nitrogênio e fertilidade do solo em áreas em recuperação com leguminosas e em sistema de agricultura itinerante de alta produtividade .
This study aimed to evaluate carbon and nitrogen stocks restoration, and soil fertility status in land reclamation with nodulated and mycorrhizal legume trees and fallow length on high productivity shifting cultivation. Evaluations were made of soil C and N stocks, concentration of free and occluded light fraction and soil available Ca, Mg, P, K, C and N, an
Publicado em: 2007
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22. Caracterização fisiológica e influência da época de plantio no florescimento de cultivares de cana-de-açúcar.
Brazil is the largest sugarcane producer in the world, and this extremely important crop gives rise to significant social, economical and environmental implications for the country. Brazil is also the largest industrial manufacturer of sugarcane alcohol and thus occupies a strategic position in terms of supply of this alternative and renewable source of ener
Publicado em: 2007
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23. Análise comparativa da eficiência entre as espécies florestais pinus taeda e araucaria angustifolia (bert.) o. ktze no seqüestro de co2 em reflorestamento na Região Sul do Brasil
The emission of polluted gases and its negative environmental effects has gained increasing importance in the last years, due the called global climate changes, caused by the heat retention in the atmosphere. And finding solution, emphasizing the Kyoto Protocol, where it motivates the capture of GEE through reforestation, over all, with species of fast growt
Publicado em: 2006
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24. Uso e propriedades do solo : efeitos nas micorrizas arbusculares
Arbuscular mycorrhizal fungi (AMF) are important components of ecosystems, because they are associate to plants and they increase phosphorus absorption, being important for studding the effects of converting native areas in to pasture or cultivation of the AMF in areas of âCaatingaâ and of Atlantic forest, and to evaluate the capacity of mycorrhizal plants
Publicado em: 2004