Environmental Biodegradation
Mostrando 13-24 de 98 artigos, teses e dissertações.
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13. The effects of trace elements, cations, and environmental conditions on protocatechuate 3,4-dioxygenase activity
Phenanthracene is a highly toxic organic compound capable of contaminating water and soils, and biodegradation is an important tool for remediating polluted environments. This study aimed to evaluate the effects of trace elements, cations, and environmental conditions on the activity of the protocatechol 3,4-dioxygenase (P3,4O) enzyme produced by the isolate
Sci. agric. (Piracicaba, Braz.). Publicado em: 2013-04
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14. Toxicological evaluation of vegetable oils and biodiesel in soil during the biodegradation process
Vegetable oils and their derivatives, like biodiesel, are used extensively throughout the world, thus posing an environmental risk when disposed. Toxicity testing using test organisms shows how these residues affect ecosystems. Toxicity tests using earthworms (Eisenia foetida. are widespread because they are a practical resource for analyzing terrestrial org
Braz. J. Microbiol.. Publicado em: 2012-12
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15. Preparação, caracterização e estudos de biodegradação de blendas à base de PDLLA e PVP
Poly(D,L-lactide), PDLLA, is a polymer with potential applications in medical, environmental, and pharmaceutical areas. Despite its versatility, the hydrophobicity limits its applications. To overcome this problem, one strategy is the preparation of blends with hydrophilic polymers such as poly(vinylpyrrolidone), PVP. In this study, we report the preparation
Química Nova. Publicado em: 2012
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16. A procura de bactérias degradadoras de metamidofós. / Searching for methamidofos degrading bacteria.
Methamidophos is a strong acetylcholinesterase inhibitor and, therefore, a very toxic organophosphorus insecticide. This product has been widely employed for pest control in a variety of cultures, but little information is available about its biodegradation. 12 bacteria were isolated and characterized, from water and soil samples obtained from a site contami
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/09/2011
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17. Análise econômica da produção de polímeros biodegradáveis no contexto de uma biorefinaria a partir de cana-de-açúcar. / Economic assessment of biopolymer production in a sugarcane based biorefinery context.
Polihidroxialcanoatos são polímeros biodegradáveis, sintetizados por bactérias a partir de fontes de carbono renováveis. Este trabalho se concentra na produção de P3HB a partir de xilose no contexto de uma usina padrão de álcool e açúcar que produz energia através de cogeração, utiliza resíduos agrícolas de cana-de-açúcar e passaria a produ
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 05/09/2011
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18. Seleção de fungos produtores de lipases a partir de resíduos oleosos derivados do saneamento ambiental
The selection of fungi producing lipase from oily residues of environmental sanitation is the main objective of this work. Of 113 fungal isolates obtained, 75 were pre-selected as producers of lipase. Of these,16 were selected by the largest indices enzymatic and four by growth and response to rhodamine-B test, having quantified its specific lipolytic activi
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/02/2011
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19. Biodegradation of crude petroleum oil and environmental pollutants by Candida tropicalis strain
A local yeast isolate named A was isolated from polluted area of Abou-Qir gulf (Alexandria, Egypt), identified according to a partial sequence of 18sRNA as Candida tropicalis. The isolate showed a high potency in petroleum oil biodegradation as well some hydrocarbons. Morphological changes in cell diameter of this yeast were recognized upon growing the targe
Brazilian Archives of Biology and Technology. Publicado em: 2011-08
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20. Aplicação do modelo Tucker-3 para a análise da biodegradação de diesel
Tucker-3 model offers several advantages for analysis of environmental data but its interpretation is still challenging. A Tucker-3 model was applied to a biodegradation experiment involving a large number of overlapped chromatographic peaks and a temporal variation. The Tucker-3 model allowed the data to be decomposed in two processes: evaporation and biode
Química Nova. Publicado em: 2010
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21. LixiviaÃÃo, formaÃÃo de resÃduos ligados e biorremediaÃÃo de atrazina em solo subtropical submetido à aplicaÃÃo de Ãgua residuÃria da suinocultura / Leaching, bound residues formation and bioremediation of the atrazine in subtropical soil submitted of swine wastewater application
Atrazine is a triazine herbicide, widely used in agriculture to control weeds in corn and cane sugar farming. However, atrazine is considered a pesticide moderately persistent in the environment and the application of wastewater to the soil can affect its environmental performance. In this study, the effects of wastewater from swine (ARS) in leaching, dissip
Publicado em: 2010
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22. ANTI-INFLAMATÓRIO DEXAMETASONA: ESTUDOS DE BIODEGRADABILIDADE, TOXICIDADE, OCORRÊNCIA E DEGRADAÇÃO OXIDATIVA AVANÇADA EM EFLUENTE HOSPITALAR / ANTI-INFLAMMATORY DEXAMETHASONE: STUDIES OF BIODEGRADABILITY, TOXICITY, OCCURRENCE AND ADVANCED OXIDATIVE DEGRADATION IN HOSPITAL EFFLUENT
A presença de fármacos e substâncias ativas no ambiente vem sendo causa de preocupação nos últimos anos. Uma gama destes compostos tem sido encontrada em águas tratadas em estações de tratamento de efluentes, águas superficiais e, menos frequentemente, em águas subterrâneas, em todo o mundo. A Dexametasona (DEX), um anti-inflamatório análogo à
Publicado em: 2010
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23. Evaluación de la degradación por termoxidación de termoplásticos empleados en aplicaciones agrícolas
Polyolefins as polypropylene are used in agricultural applications for plant assistance and protection. However, their massive consumption is causing environmental problems. In this study, polypropylene and polypropylene blends with starch and biodegradable polymers such as Mater-Bi that could be used in this agricultural endeavor, were exposed to several th
Rem: Revista Escola de Minas. Publicado em: 2009-12
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24. Bioremediation of a tropical soil contaminated with plasticizers process wastes. / Biorremediação de solo tropical contaminado com resíduos da produção de plastificantes.
Plasticizers are low volatility compounds that offer flexibility and processability to resins. The phthalates and adipates, used as plasticizers, have low water solubility e high partition octanol/water(Kow) and accumulate in soil and sediments. This compounds are considered teratogenics, carcinogenics and as endocrine disruptors. This study evaluated the bi
Publicado em: 2009