Apparent C Mineralization
Mostrando 1-12 de 17 artigos, teses e dissertações.
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1. Eletrodos porosos contendo TiO2 e WO3 : propriedades eletroquímicas e atividade fotocatalítica para remoção do corante Rodamina 6G e do hormônio 17 a-etinilestradiol em solução aquosa / Porous electrodes containig TiO2 and WO3 : eletroctrochemical properties and photocatalytic activity for removal of Rodhamine 6G dye and 17 alfa -ethynylestradiol
Porous films electrodes containing TiO2 and WO3 were deposited on SnO2:F (FTO) conducting glass from aqueous suspensions with TiO2 Degussa P25®, WO3 precursors and polyethylene glycol, followed by heating (450°C, 30 min). The maximum absorption was respectively observed at 390 and 480 nm for TiO2 and WO3 samples; intermediate values were obtained for the m
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 02/07/2012
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2. DINÂMICA DO CARBONO DURANTE A DECOMPOSIÇÃO DE PALHA DE TRIGO MARCADA COM 13C E DEJETOS LÍQUIDOS DE SUÍNOS / CARBON DYNAMICS DURING DECOMPOSITION OF 13C-LABELLED WHEAT STRAW AND PIG SLURRY
Em áreas de plantio direto, os dejetos de suínos são aplicados sobre os resíduos culturais, tanto de plantas de cobertura de solo como das culturas comerciais. Existem poucas informações de pesquisa envolvendo a dinâmica do carbono no solo com esta modalidade de aplicação dos dejetos. Uma melhor compreensão da dinâmica do carbono durante a decompo
Publicado em: 2007
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3. Argamassa de cimento reforçada com fibras de bagaço de cana-de-açucar e sua utilização como material de construção
In this research, "Cement mortar reinforced with sugar cane bagasse fibers and its use as building material", the use of solid waste from sugar alcohol industry as a component to alternative material. The addition of cane bagasse to cement mortar can result in a good building material, provided that problems of chemical incompatibility of fiber and cement ar
Publicado em: 1996
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4. Aerobic and anaerobic degradation and mineralization of 14C-chitin by water column and sediment inocula of the York River estuary, Virginia.
Potential rates of chitin degradation (Cd) and mineralization (Cm) by estuarine water and sediment bacteria were measured as a function of inoculum source, temperature, and oxygen condition. In the water column inoculum, 88 to 93% of the particulate chitin was mineralized to CO2 with no apparent lag between degradation and mineralization. No measurable disso
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5. Kinetics of mineralization of organic compounds at low concentrations in soil.
The kinetics of mineralization of 14C-labeled phenol and aniline were measured at initial concentrations ranging from 0.32 to 5,000 ng and 0.30 ng to 500 micrograms/g of soil, respectively. Mineralization of phenol at concentrations less than or equal to 32 ng/g of soil and of aniline at all concentrations began immediately, and the curves for the evolution
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6. Enhanced biodegradation of phenanthrene in oil tar-contaminated soils supplemented with Phanerochaete chrysosporium.
In recent years, the white rot fungus Phanerochaete chrysosporium has shown promise as an organism suitable for the breakdown of a broad spectrum of environmental pollutants, including polynuclear aromatic hydrocarbons (PAHs). The focus of this study was to determine whether P. chrysosporium could effectively operate in an actual field sample of oil tar-cont
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7. Enhancement of Solubilization and Biodegradation of Polyaromatic Hydrocarbons by the Bioemulsifier Alasan
Alasan, a high-molecular-weight bioemulsifier complex of an anionic polysaccharide and proteins that is produced by Acinetobacter radioresistens KA53 (S. Navon-Venezia, Z. Zosim, A. Gottlieb, R. Legmann, S. Carmeli, E. Z. Ron, and E. Rosenberg, Appl. Environ. Microbiol. 61:3240–3244, 1995), enhanced the aqueous solubility and biodegradation rates of polyar
American Society for Microbiology.
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8. Rapid Benzene Degradation in Methanogenic Sediments from a Petroleum-Contaminated Aquifer
In methanogenic sediments from a petroleum-contaminated aquifer, [14C]benzene was converted to 14CH4 and 14CO2 without an apparent lag. Phenol, acetate, and propionate were intermediates in benzene mineralization. These results suggest that alternative electron acceptors need not be available for there to be significant natural attenuation of benzene in some
American Society for Microbiology.
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9. Degradation of Phthalate and Di-(2-Ethylhexyl)phthalate by Indigenous and Inoculated Microorganisms in Sludge-Amended Soil
The metabolism of phthalic acid (PA) and di-(2-ethylhexyl)phthalate (DEHP) in sludge-amended agricultural soil was studied with radiotracer techniques. The initial rates of metabolism of PA and DEHP (4.1 nmol/g [dry weight]) were estimated to be 731.8 and 25.6 pmol/g (dry weight) per day, respectively. Indigenous microorganisms assimilated 28 and 17% of the
American Society for Microbiology.
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10. Biodegradation of 1,2,3- and 1,2,4-Trichlorobenzene in Soil and in Liquid Enrichment Culture †
The biodegradation of radiochemically pure (99%) 1,2,3- and 1,2,4-trichlorobenzene (TCB) in soil was investigated. Experimental difficulties posed by the high volatility and slow biodegradation rate of the TCBs were partially overcome by using a specially designed incubation and trapping apparatus. Evolution of 14CO2 from active versus poisoned soil dosed wi
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11. Mineralization of Trichloroethylene by Heterotrophic Enrichment Cultures
Microbial consortia capable of aerobically degrading more than 99% of exogenous trichloroethylene (TCE) (50 mg/liter) were collected from TCE-contaminated subsurface sediments and grown in enrichment cultures. TCE at concentrations greater than 300 mg/liter was not degraded, nor was TCE used by the consortia as a sole energy source. Energy sources which perm
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12. Effect of manganese on preferential degradation of lignin by Pleurotus ostreatus during solid-state fermentation.
Practical utilization of the polysaccharides in the lignocellulosic complex is limited because of the high lignin content of the complex. In this study we focused on the effect of Mn on lignin and cellulose biodegradation during solid-state fermentation by the edible mushroom Pleurotus ostreatus. Preferential degradation of lignin was enhanced by the additio