Biological Exposure Limit
Mostrando 1-12 de 27 artigos, teses e dissertações.
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1. Avaliação das condições ambientais e de trabalho em salas cirúrgicas e de necropsia - estudos de casos em hospitais públicos e IMLs da região metropolitana do Rio de Janeiro / Environmental and work conditions assessment - study cases in public hospitals and IMl S of the metropolitan region of Rio de Janeiro
A qualidade do ar é um importante indicador de saúde ambiental, sendo o seu monitoramento contínuo necessário. Apesar da relevância do tema, há muitos países em que os limites de exposição para agentes biológicos ainda não foram estabelecidos ou foram definidos de forma inadequada, podendo comprometer a qualidade ambiental. Os ambientes hospitalar
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 04/08/2011
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2. DETERMINATION OF TOTAL AS IN OCEANIC WATER BY HG AFS / DETERMINAÇÃO DE AS TOTAL EM ÁGUAS OCEÂNICAS POR HG AFS
The increase in industrial activity has increased human exposure to metals and metalloids exponentially. In this context, arsenium is a good example, being increasingly found in several natural environments. It is an element with no essential biological function, and possessed of elevated toxicity. The discharge of toxic elements in aquatic bodies can promot
Publicado em: 2010
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3. Indicadores Biológicos de Exposição a solventes orgânicos e sua inter-relação com o estresse oxidativo / Biological Exposure Indices of organic solvents and its relationship with the oxidative stress
The use of organic solvents in the work environment represents a significant risk to workers health. The painters composed, among others, a group of individuals who are in direct contact with solvents through the respiratory and dermal route. The biological monitoring, through biological exposure index (BEI) determination, can ensure the emergence of chronic
Publicado em: 2008
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4. Determinação de metil-etil-cetona em amostras de urina com amostragem por micro extração em fase sólida (MEFS) em headspace associada à cromatografia gasosa com detector de ionização de chama (CG-DIC)
Methyl ethyl ketone (MEK) is a solvent commonly used in chemical, paint and shoe industry. The aim of this study was to develop and validate a method for urinary quantification of MEK, employing headspace solid phase micro extraction sampling (SPME) coupled to gas chromatography with flame ionization detection (GC-FID). The calibration curve (y=4.6851x-0.001
Química Nova. Publicado em: 2008
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5. measure Biomarker / Mensuração de biomarcador de exposição às aflatoxinas em fluidos biológicos
Aflatoxins are natural substances that present toxic and carcinogenic effects to humans. These substances may be present in human diet or, in specific cases, in the breathing air. Thus, the human exposition to aflatoxins is object of concern. One of the most effective ways to evaluate human exposition to aflatoxins is to measure the presence of biomarkers in
Publicado em: 2007
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6. Avaliação dos indicadores biológicos de exposição aos metais em trabalhadores de fundições / Evaluation of biological indicators of exposure to metals in foundry workers
The sanitary metal production is a sector in constant development in Brazil. This industrial process involves stages such as evaporation, condensation and oxidation of metals, therefore allowing the formation of metallic fumes in some types of industry, and also in foundries. The contaminated environment can induce, in the workers, biochemical alterations an
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 07/12/2004
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7. Niveis de glutationa reduzida e atividade da catalase, superoxido dismutase e glicose-6-fosfato desidrogenase em individuos expostos ao vapor de mercurio
Mercury (Hg) is used in different human activities. The primary exposition to this metal has its origin from the ingestion of contaminated food and odontologic amalgam. The occupational exposure is the most frequent via in cantamination. Mercury tightly binds to sulfidric groups (SH) presenting cell membrane proteins, enzymes, and low molecular weight substa
Publicado em: 1995
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8. Metodos para expressar a excreção urinaria do fluor como indicador de exposição
Urinary fluoride can be used as an index of exposure because fluoride is excreted by lhe kidney into the urine. Biological threshold limit value has been recommended, but there are no agreement about which method to use in order to express urinary fluoride concentration since the sources of exposure can be different.Spot urine samples were collected from adu
Publicado em: 1990
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9. Trichloroethylene exposure. Biological monitoring by breath and urine analyses.
A mathematical model developed previously has been used to study some aspects of biological monitoring of exposure to trichloroethylene (TRI) by the analysis of this solvent in alveolar air or of its metabolites, trichloroethanol (TCE) and trichloroacetic acid (TCA), in urine. Assuming that a biological control must be representative of the time-weighted ave
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10. Biological monitoring of workers exposed to benzene in the coke oven industry.
Workers in the coke oven industry are potentially exposed to low concentrations of benzene. There is a need to establish a well validated biological monitoring procedure for low level benzene exposure. The use of breath and blood benzene and urinary phenol has been explored in conjunction with personal monitoring data. At exposures of about 1 ppm benzene, ur
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11. Use of molecular epidemiological techniques in a pilot study on workers exposed to chromium.
OBJECTIVES--Molecular epidemiological techniques, capable of detecting damage to DNA, were used to see if such damage occurred in the lymphocytes of a group of workers exposed to chromium. The two aims of this pilot study were to see if these new techniques might make useful biological monitoring tools for workers exposed to chromium and also, to help assess
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12. Allylmercapturic acid as urinary biomarker of human exposure to allyl chloride.
OBJECTIVE: To evaluate the use of urinary mercapturic acids as a biomarker of human exposure to allyl chloride (3-chloropropene) (AC). During three regular shut down periods in a production factory for AC, both types of variables were measured in 136 workers involved in maintenance operations. METHODS: Potential airborne exposure to AC was measured by person