Lead Contamination
Mostrando 13-24 de 133 artigos, teses e dissertações.
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13. 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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14. Essential minerals and inorganic contaminants (barium, cadmium, lithium, lead and vanadium) in dried bee pollen produced in Rio Grande do Sul State, Brazil
Abstract Like other beehive products, such as honey, royal jelly and propolis, bee pollen has attracted great interest because of the health benefits it can provide when consumed. Bee pollen has high contents of sugars and proteins and a low content of lipids, it is also a rich source of vitamins and other bioactive compounds, which makes it an attractive mi
Food Sci. Technol. Publicado em: 03/06/2016
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15. INVESTIGATION OF BIOFILM FORMATION IN COAGULASE-NEGATIVE STAPHYLOCOCCI ISOLATED FROM PLATELET CONCENTRATE BAGS
Platelet Concentrates (PCs) are the blood components with the highest rate of bacterial contamination, and coagulase-negative staphylococci (CoNS) are the most frequently isolated contaminants. This study investigated the biofilm formation of 16 contaminated units out of 691 PCs tested by phenotypic and genotypic methods. Adhesion in Borosilicate Tube (ABT)
Rev. Inst. Med. trop. S. Paulo. Publicado em: 23/02/2016
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16. Thermal processes for lead removal from the funnel glass of CRT monitors
The disposal of CRT monitors increases each year, generating millions of tons of waste containing various types of materials. The glass present in CRT tubes displayed about 20%-25% of lead oxide. If improperly disposed of, this glass can be leached directly in nature or may cause environmental contamination, especially with lead. Because of this leaching pos
Rem: Rev. Esc. Minas. Publicado em: 2015-09
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17. Health risk assessment of heavy metals in vegetables grown around battery production area
Battery production is one of the main sources of heavy metals that present great harm to human health even in low concentrations. Chromium (Cr), Cadmium (Cd) and Lead (Pb) were measured in edible portions of vegetables and soils around a battery production area in China, and the potential health risk of heavy metal contamination to the local population via v
Sci. agric. (Piracicaba, Braz.). Publicado em: 2014-04
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18. Influence of physical damage and freezing on histamine concentration and microbiological quality of yellowfin tuna during processing
Yellowfin tuna has a high level of free histidine in their muscle, which can lead to histamine formation by microorganisms if temperature abuse occurs during handling and further processing. The objective of this study was to measure levels of histamine in damaged and undamaged thawed muscle to determine the effect of physical damage on the microbial count a
Food Sci. Technol. Publicado em: 02/08/2013
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19. Formation of biofilm by Listeria monocytogenes ATCC 19112 at different incubation temperatures and concentrations of sodium chloride
Biofilm formation can lead to various consequences in the food processing line such as contamination and equipment breakdowns. Since formation of biofilm can occur in various conditions; this study was carried out using L. monocytogenes ATCC 19112 and its biofilm formation ability tested under various concentrations of sodium chloride and temperatures. Cultu
Braz. J. Microbiol.. Publicado em: 19/03/2013
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20. Avaliação da concentração de elementos químicos tóxicos na merenda escolar de crianças da cidade de Ribeirão Preto e estimativa de suas ingestões diárias / Assessment of toxic chemicals concentration in the school
Chemical\ s contamination in the environment is a growing worldwide problem. Many of these chemical elements, including Cd, Pb and As are toxic to humans. According to the World Health Organization (WHO), 90% of the intake of these toxic elements occurs through the food consumption (Tavares et al., 1992; Virga et al., 2007). Therefore, the estimation of expo
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 19/09/2012
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21. Valores de referência para metais potencialmente tóxicos em sedimentos e em moluscos filtradores no Rio Ribeira de Iguape / Reference values to potentially toxic metals in sediments and mussels in the River Ribeira de Iguape
The Ribeira do Iguape River Basin (RIRB) was historically influenced by intense mining activities mainly related to lead (Pb) extraction. For many decades, such exploitation was conducted under rudimentary conditions without control of environmental impacts produced during the stages of ore extraction and beneficiation. Thus, mining wastes and metallurgical
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 20/06/2012
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22. Crianças e adolescentes com plumbemia : habilidades sociais, problemas de comportamento, funcionamento intelectual e variáveis sociodemográficas / Social skills, blood lead level, intellectual functioning and social demographics variables in children and adolescents.
The World Health Organization has established that blood lead levels beyond 10μg/dl can cause neural behavior alterations in children, such as deficits in psychological development, hyperactivity, language development and cognition. This recognized group of potential hazards generated by blood lead level could lead to thinking about compromising of infa
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 15/06/2012
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23. Metais traço e aminas bioativas em alface proveniente da agricultura urbana
Urban agriculture is an activity being practiced in every city of the world. Its practice has provided several benefits to growers, among them, availability of fresh vegetables, source of vitamins, minerals and bioactive compounds such as polyamines, which have shown antioxidant activity. However, urban agriculture can be a risk in case the vegetables are co
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/05/2012
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24. Resistência adesiva dos cimentos resinosos convencionais e autoadesivos à dentina contaminada por saliva / Bond strength of different composite resin cements and dentin interfaces contaminated with saliva
Many dental injuries require indirect restorations fixed by adhesive cements. In some situations is not possible to isolate the operative field, which can lead to contamination by saliva of the dentin. The aim of this study was to analyze the treatment of dentin contaminated with saliva on shear bond strength of conventional and self-adhesive resin cements.
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 20/04/2012