Metal Tolerance
Mostrando 13-24 de 98 artigos, teses e dissertações.
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13. Analysis for the presence of determinants involved in the transport of mercury across bacterial membrane from polluted water bodies of India
Abstract Mercury, which is ubiquitous and recalcitrant to biodegradation processes, threatens human health by escaping to the environment via various natural and anthropogenic activities. Non-biodegradability of mercury pollutants has necessitated the development and implementation of economic alternatives with promising potential to remove metals from the e
Braz. J. Microbiol.. Publicado em: 2016-03
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14. Modeling and analysis of soybean (Glycine max. L) Cu/Zn, Mn and Fe superoxide dismutases
Superoxide dismutase (SOD, EC 1.15.1.1) is an important metal-containing antioxidant enzyme that provides the first line of defense against toxic superoxide radicals by catalyzing their dismutation to oxygen and hydrogen peroxide. SOD is classified into four metalloprotein isoforms, namely, Cu/Zn SOD, Mn SOD, Ni SOD and Fe SOD. The structural models of soybe
Genet. Mol. Biol.. Publicado em: 17/05/2013
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15. Monitoramento ambiental de zinco em produtos agrícolas / Environmental monitoring of zinc in agricultural products
Large areas have been affected by heavy metals in concentrations which may pose environmental hazard. Due to increased industrial activity and highly technical agriculture, it becomes critical to monitor the levels of heavy metals in soil, because plants behave as a mechanism for transfer of contaminants from soil to higher levels of the food chain. Ingestio
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 09/10/2012
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16. Heavy metal tolerance (Cr, Ag and Hg) in bacteria isolated from sewage
Samples of sewage from a university hospital and a chemistry technical school were analysed for the percentage of bacterial tolerance to chromium (Cr), silver (Ag) and mercury (Hg). Additionally, we investigated the effect of these metals on pigmentation and on some enzymatic activities of the metal tolerant strains isolated, as well as antimicrobial resista
Braz. J. Microbiol.. Publicado em: 2012-12
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17. Desenvolvimento de novos sistemas de eletrocatalisadores nano-dispersos 20%Pt-(2% Pt-Ce0,9W0,102)/C tolerantes ao monóxido de carbono( CO) para ânodos de PEMFC / Development of new systems of nano-disperse 20%Pt-(2%Pt-Ce0,9W0,1O2)/C electrocatalysts tolerant to carbon monoxide (CO) for PEMFCs anodes
O material (pó) de nanofase de Ce0,9W0,1O2 foi sintetizado por coprecipitação de oxalatos de cério (IV) e cátions de tungstênio (IV). A redução da platina (2%) foi feita pelo método da redução por álcool, utilizando uma solução de ácido hexacloroplatínico (H2PtCl6.6H2O) como fonte do metal, óxido de cério dopado com tungstênio (Ce0,9W0,1O2
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/08/2011
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18. Ecophysiological and anatomical changes due to uptake and accumulation of heavy metal in Brachiaria decumbens
The growth and developmental characteristics of grasses and their high biodiversity make such plants suitable for remediation of areas contaminated by heavy metals. Nevertheless, heavy metal toxic effect on the plants may cause alteration in their metabolic pathways, such as photosynthesis, respiration, and growth, modifying plant anatomy. This work aimed to
Scientia Agricola. Publicado em: 2011-10
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19. Antioxidant system of ginseng under stress by cadmium
Toxic levels of Cd can cause protein denaturation and oxidative stress, which result in membrane damage, enzimatic activity changes and other metabolic damage. Some plants may show alteration in the activity of their antioxidant enzymes as a heavy metal tolerance mechanism. This study aims at evaluating the role of enzymes of the antioxidant system in adapti
Scientia Agricola. Publicado em: 2011-08
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20. Quick adaptation of Ralstonia Solanacearum to copper stress to recover culturability and growth in water and soil
Cells of Ralstonia solanacearum were exposed to Cu in distilled water, and the resulting Cu-stressed non-culturable cells were inoculated to natural (non-pasteurized) and pasteurized soils in order to examine their culturability and recovery. Exposing the cells to 20 µM CuSO4 produced transitory non-culturable cells, which exhibited a remarkable recovery in
Brazilian Journal of Microbiology. Publicado em: 2011-06
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21. Identificação de espécies hiperacumuladores e prospecção de genes relacionados à tolerância de plantas a cádmio / Identification of hyperaccumulator species and prospecting plant genes related to cadmium tolerance
Nas últimas décadas, com aumento da industrialização e o uso mais intenso de práticas agrícolas, está havendo a liberação de altas quantidades de elementos potencialmente tóxicos na biosfera, como o metal pesado cádmio (Cd), que é muito tóxico à maioria dos organismos. Uma alternativa para solucionar este problema é o uso da fitoextração, qu
Publicado em: 2011
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22. Predictors of restenosis after percutaneous coronary intervention using bare-metal stents: a comparison between patients with and without dysglycemia
The objective of this study was to identify intravascular ultrasound (IVUS), angiographic and metabolic parameters related to restenosis in patients with dysglycemia. Seventy consecutive patients (77 lesions) selected according to inclusion and exclusion criteria were evaluated by the oral glucose tolerance test and the determination of insulinemia after a s
Brazilian Journal of Medical and Biological Research. Publicado em: 2010-06
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23. Role of ferritin in the rice tolerance to iron overload
Deficiência de ferro (Fe) ocorre freqüentemente em plantas, uma vez que este mineral é pouco disponível em condições aeróbicas. Plantas de arroz cultivadas sob alagamento, no entanto, estão sujeitas ao excesso de Fe, que pode ser extremamente tóxico. Alguns cultivares de arroz são resistentes a altas concentrações de ferro, mas os mecanismos fisi
Publicado em: 2010
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24. Fitotoxicidade do alumínio : efeitos, mecanismo de tolerância e seu controle genético / Aluminum phytotoxicity: effects, tolerance mechanisms and it’s genetic control
Solos ácidos associados a metais tóxicos são uma das maiores restrições à produção agrícola e, entre os metais, o alumínio destaca-se como um dos maiores problemas em solos com pH ≤ 5,0. O melhoramento para tolerância ao alumínio é considerado um excelente caminho para aumentar o desempenho de plantas economicamente importantes cultivadas em s
Publicado em: 2010