Pb Toxicity
Mostrando 1-12 de 61 artigos, teses e dissertações.
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1. Environmental effects of leachate extracts from reclaimed asphalt pavement: determination of metals, polycyclic aromatic hydrocarbon and acute toxicity to Daphnia magna
RESUMO Reclaimed Asphalt Pavement (RAP) has a variety of organic and inorganic compounds that can interact with the environment and promote deleterious effects on human health. This study investigated the potential toxicity of RAP through metal determination, polycyclic aromatic hydrocarbon (PAH) analysis and acute toxicity tests with Daphnia magna. Leached
Engenharia Sanitaria e Ambiental. Publicado em: 2022
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2. Interaction of Pb, Ni and Cd with Aquatic Humic Substances of Amazonian Blackwater Rivers
In this study, the extraction and characterization of aquatic humic substances (AHS) from two blackwater rivers in the Amazon basin was carried out in order to assess the seasonal effects in the AHS structure. In addition, an investigation of the complexing capacities (CC) of the structures containing the metal ions CdII, NiII and PbII was also done. The cha
J. Braz. Chem. Soc.. Publicado em: 2021-02
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3. Actividad de enzimas del estrés oxidativo en plantas de tomate cv. Amalia en respuesta al plomo
ABSTRACT Contamination of soils by heavy metals is a result of human activity, agriculture and industry. Among heavy metals, lead is a potential pollutant that in plants causes numerous symptoms of toxicity such as stunted growth, blackening of the root system and generalized chlorosis. The activity of superoxide dismutase enzyme (SOD; EC 1.15.1.1) and gluta
Hortic. Bras.. Publicado em: 2017-04
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4. Antifungal activity of extracts from Atacama Desert fungi againstParacoccidioides brasiliensis and identification ofAspergillus felis as a promising source of natural bioactive compounds
Fungi of the genus Paracoccidioides are responsible for paracoccidioidomycosis. The occurrence of drug toxicity and relapse in this disease justify the development of new antifungal agents. Compounds extracted from fungal extract have showing antifungal activity. Extracts of 78 fungi isolated from rocks of the Atacama Desert were tested in a microdilution as
Mem. Inst. Oswaldo Cruz. Publicado em: 2016-03
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5. Clinical safety evaluation of a tea containing Cissampelos sympodialis in healthy volunteers
ABSTRACTCissampelos sympodialis Eichler, Menispermaceae, is widely used by Indian tribes and folk medicine to treat various inflammatory disorders, including asthma. Clinical toxicological trials were made with the tea of C. sympodialis, a medicinal plant. The study took place at Lauro Wanderley Hospital/UFPB-PB, where seventeen healthy volunteers were chose
Rev. bras. farmacogn.. Publicado em: 2015-10
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6. Estimation of some heavy metals in polluted well water and mercury accumulation in broiler organs
The aim of this study was to investigate the relationship between the concentrations of heavy metals in well water and bioaccumulation of the most abundant metals in chicken tissues in some areas in the province of Mecca Almokaramah, Saudi Arabia. Among the heavy metals (Cd, Zn, Cr, Mn, Cu Hg, Pb and Ni) studied, mercury (Hg) revealed highest in concentratio
Braz. arch. biol. technol.. Publicado em: 2013-10
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7. Assessment of water quality of the Corumbataí River (SP) through biotic and abiotic variables / Avaliação da qualidade da água do rio Corumbataí (SP) por meio de variáveis bióticas e abióticas
A poluição das águas tem sido um problema para a sociedade. Atualmente as bacias hidrográficas são áreas geográficas de grande preocupação para os setores públicos e privados e as degradações antrópicas, se refletem no âmbito social e econômico. A preferência pelo rio Corumbataí neste estudo se deu pela grande diversidade de impactos sobre a
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 02/05/2012
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8. Toxicidade do chorume de aterro doméstico : avaliação por meio de biomarcadores em bivalves
Estudos ecotoxicológicos podem ser empregados na avaliação da qualidade de ecossistemas, por meio do uso de biomarcadores, que são alterações em parâmetros em nível subindividual que indicam que um organismo foi exposto a contaminantes. Os bivalves são organismos frequentemente utilizados em estudos ecotoxicológicos e a espécie Corbicula fluminea
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/03/2012
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9. Disponibilidade de Cd em Latossolos e sua transferência e toxicidade para as culturas de alface, arroz e feijão / Cadmium availability in Oxisols and its transfer and toxicity to lettuce, rice and bean crops
O cádmio (Cd) é um elemento potencialmente tóxico para as plantas, animais e homens. O Cd é particularmente perigoso devido à sua mobilidade relativamente alta em solos e transferência para as plantas. Além disso, plantas que crescem em solos contaminados podem acumular Cd nos tecidos comestíveis em grandes quantidades sem qualquer sintoma visível d
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 24/02/2012
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10. Avaliação de sistemas de desfluoretação de águas para comunidades rurais do semi-árido / EVALUATION OF DEFLUORIDATION WATER SYSTEMS FOR SEMI-ARID RURAL COMMUNITIES.
O presente estudo objetivou implantar, avaliar e comparar a eficácia de dois sistemas de desfluoretação de águas em duas localidades com problema de fluorose endêmica na zona rural de São João do Rio do Peixe, Paraíba. Os sistemas investigados foram Estação de Tratamento de Águas (ETA) e Filtro Desfluoretador Regenerável (FDR). O estudo foi divid
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 15/02/2012
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11. Fitoextração em solo contaminado com metais pesados / Phytoextraction of soil contaminated with heavy metals
The industrial and urban progress associated with increased production of consumer goods has resulted in the generation of waste, which, for a long time, was indiscriminately discarded in the environment, causing damage usually irreversible to recover. Two experiments were conducted in soils contaminated with heavy metals: the first aimed at the disposal of
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 25/07/2011
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12. Avaliação da imobilização do sal trissódico do ácido 1,8 -dihidróxi-2-(4-sulfofenilazol)-3,6-naftalenodisulfônico (SPADNS) em sílica gel / Evaluation of 2-(4-sulphophenylazo)-1,8-dihydroxy-3,6-napthalene disulphonic acid trisodium salt immobilization at silica gel
Solid phase extraction (SPE) is a kind of procedure for preconcentration and choice of solid phase is very important to develop analytical methods because your selectivity, affinity and retention capacity. The metals preconcentration is very used in environmental samples that have metals such as Pb2+, Cd2+, Ni2+, Al3+ at μg L-1. In that sense, the main
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 18/03/2011