Carbon Cycle
Mostrando 13-24 de 695 artigos, teses e dissertações.
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13. Decomposition and Nutrient Release of Cover Crops in Mango Cultivation in Brazilian Semi-Arid Region
ABSTRACT Knowledge of the decomposition dynamics of aboveground phytomass and its release of nutrients in mixtures of cover crops as well as the impact on the soil tillage system is fundamental for the sustainable management of agroecosystems. This work aimed to evaluate whether soil tillage and the choice of cover crops cultivated in the interrows can be te
Rev. Bras. Ciênc. Solo. Publicado em: 29/04/2019
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14. Avaliação comparativa da pegada de carbono de margarina e manteiga produzidas no Sul do Brasil
RESUMO A avaliação de ciclo de vida (ACV) é uma técnica de estimativa de impactos ambientais, como emissão de gases de efeito estufa (CO2eq), para geração de produto ou realização de processo. O objetivo deste estudo foi estabelecer a pegada de carbono para a produção da margarina e da manteiga com uso das normas ISO e PAS aplicadas a uma empresa
Eng. Sanit. Ambient.. Publicado em: 25/04/2019
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15. Background and the use of isoscapes in the Brazilian context: essential tool for isotope data interpretation and natural resource management
Resumo Padrões de distribuição espacial de isótopos estáveis podem ser apresentados em mapas chamados de isoscapes e têm sido amplamente utilizados para rastrear processos biogeoquímicos em sistemas naturais e antrópicos. Isoscapes têm o potencial de melhorar a disseminação e interpretação dos padrões espaciais de isótopos estáveis, aumentar
Rev. Ambient. Água. Publicado em: 25/03/2019
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16. Evaluación del uso de acetileno como fuente de carbono en la carburización de aceros
ABSTRACT The effect of using acetylene as a carbon source in the gas carburization of AISI/SAE 8620 steel was evaluated in this work. For this purpose, a gaseous carburizing system was designed and manufactured with the following characteristics: controlled production of a carburant gaseous atmosphere, inert and hermetic isothermal reaction zone and carbon/o
Matéria (Rio J.). Publicado em: 19/07/2018
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17. The genome sequence of Dyella jiangningensis FCAV SCS01 from a lignocellulose-decomposing microbial consortium metagenome reveals potential for biotechnological applications
Abstract Cellulose and its associated polymers are structural components of the plant cell wall, constituting one of the major sources of carbon and energy in nature. The carbon cycle is dependent on cellulose- and lignin-decomposing microbial communities and their enzymatic systems acting as consortia. These microbial consortia are under constant exploratio
Genet. Mol. Biol.. Publicado em: 14/05/2018
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18. Crashworthiness and Impact Energy Absorption Study Considering the CF/PA Commingled Composite Processing Optimization
The processing of the thermoplastic composites can cause matrix thermo-oxidative degradation. Understanding the level of thermo-oxidative degradation, as well as the thresholds of temperature and processing time, allows the manufacture of high performance composites with higher crashworthiness. This study evaluated the matrix thermo-oxidative degradation by
Mat. Res.. Publicado em: 22/01/2018
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19. Chemical, Biological, and Biochemical Parameters of the Soil P Cycle After Long-Term Pig Slurry Application in No-Tillage System
ABSTRACT In Southern Brazil, agricultural soils are often treated over long periods with annual pig slurry (PS) applications, and their influence on soil nutrient dynamics should be monitored. This study aimed to evaluate the P forms accumulated in the soil and some biological and biochemical parameters of the P cycle after 19 successive PS applications over
Rev. Bras. Ciênc. Solo. Publicado em: 09/11/2017
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20. Kinetics of Magnetic Ageing of 2%Si Non-oriented Grain Electrical Steel
The effect of carbon content on the magnetic ageing index and Vickers hardness evolution on annealed samples of 2%Si non-oriented grain electrical steel was studied. Samples with 40 and 60ppm carbon content were subjected at ageing temperatures of 200 and 225ºC, respectively. During the ageing treatment, the cycle was interrupted on several time intervals i
Mat. Res.. Publicado em: 23/10/2017
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21. Carbon dioxide/methanol conversion cycle based on cascade enzymatic reactions supported on superparamagnetic nanoparticles
ABSTRACT The conversion of carbon dioxide into important industrial feedstock is a subject of growing interest in modern society. A possible way to achieve this goal is by carrying out the CO2/methanol cascade reaction, allowing the recycle of CO2 using either chemical catalysts or enzymes. Efficient and selective reactions can be performed by enzymes; howev
An. Acad. Bras. Ciênc.. Publicado em: 16/10/2017
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22. Carbon and nutrient stocks of three Fabaceae trees used for forest restoration and subjected to fertilization in Amazonia
ABSTRACT Amazonia is crucial to global carbon cycle. Deforestation continues to be one of the main causes of the release of C into the atmosphere, but forest restoration plantations can reverse this scenario. However, there is still diffuse information about the C and nutrient stocks in the vegetation biomass. We investigated the carbon and nutrient stocks o
An. Acad. Bras. Ciênc.. Publicado em: 31/08/2017
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23. Predicting of biomass in Brazilian tropical dry forest: a statistical evaluation of generic equations
ABSTRACT Dry tropical forests are a key component in the global carbon cycle and their biomass estimates depend almost exclusively of fitted equations for multi-species or individual species data. Therefore, a systematic evaluation of statistical models through validation of estimates of aboveground biomass stocks is justifiable. In this study was analyzed t
An. Acad. Bras. Ciênc.. Publicado em: 23/08/2017
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24. Assessment of Metabolism of the Eastern Oyster and Eastern Elliptio Using NMR Spectroscopy
Metabolites are known to characterize the functional responses of a cell. Therefore, a quantitative measurement of metabolite profiles can provide insight into the underlying effect of genetic or environmental actions on cell metabolism. It follows then that the study of the metabolite profiles of bivalve mollusks, such as oysters, can be particularly worthw
J. Braz. Chem. Soc.. Publicado em: 2017-07