Mercury Vapour
Mostrando 1-12 de 46 artigos, teses e dissertações.
-
1. Evaluation of the catalyzed photo-cold vapour generation for determination of mercury by AAS
Nanopartículas de Ag suportadas em TiO2 (Ag-TiO2) foram usadas como catalisador na geração de vapor frio induzida por radiação UV com ácido fórmico, acoplado à absorção atômica para determinação do mercúrio total em amostras analíticas. A atividade redutora de Ag-TiO2 foi comparada com dois catalisadores semicondutores: TiO2 não modificado e
Journal of the Brazilian Chemical Society. Publicado em: 2012-02
-
2. REATOR ELETRÔNICO RESSONANTE ORIENTADO AO TESTE DIMERIZADO DE LÂMPADAS DE VAPOR DE MERCÚRIO E VAPOR DE SÓDIO EM ALTA PRESSÃO
Este trabalho apresenta a proposta de um reator eletrônico ressonante dedicado à realização de testes de funcionalidade básica de lâmpadas de vapor de sódio e de vapor de mercúrio em alta pressão. Os testes são realizados com potência reduzida visando economizar energia elétrica e minimizar o ofuscamento dos operadores. O reator proposto é parte
Publicado em: 2009
-
3. Avaliação crítica de métodos analíticos para determinação de arsênio e mercúrio em amostras de ácido sulfúrico de uma metalurgia de cobre. / Critical evaluation of analytical methods for determination of arsenic and mercury in samples of a sulfuric acid copper metallurgy.
Foram avaliados os desempenhos de três métodos analíticos baseados em: (I) espectrometria de absorção atômica com geração de vapor frio/hidretos por injeção de fluxo (FI-HG-AAS); (II) espectrometria de emissão óptica com plasma indutivamente acoplado com geração de vapor frio/hidretos em modo contínuo (HG-ICP OES) e, (III) espectrometria de em
Publicado em: 2007
-
4. The reconstruction of color spaces: type 2 diabetes and mercury vapour intoxication / Reconstrução do espaço de cores de pacientes com discromatopsia adquirida: diabéticos tipo 2 e intoxicados por vapor de mercúrio
Purpose. Color vision was examined in two groups of patients, one group with diabetes mellitus type 2 (DM2) without retinopathy (n=32) and a second group with chronic exposure to mercury vapour (Hg) (n=18), as well as in the respective age-matched controls (n=23; n=18) in order to reconstruct their color spaces. We assessed the type and degree of distortions
Publicado em: 2006
-
5. The attenuation of concentrations model: a new method for assessing mercury mobility in sediments
In this work we propose a new approach for the determination of the mobility of mercury in sediments based on spatial distribution of concentrations. We chose the Tainheiros Cove, located in the Todos os Santos Bay, Brazil, as the study area, for it has a history of mercury contamination due to a chloro-alkali plant that was active during 12 years. Twenty-si
Química Nova. Publicado em: 2004-02
-
6. Longitudinal study of workers exposed to mercury vapour at low concentrations: time course of inorganic and organic mercury concentrations in urine, blood, and hair.
Seven Japanese female workers exposed to mercury vapour at a concentration of < 0.02 mg Hg/m3 (8 h/day, 44 h/week) were examined for inorganic (I-Hg) and organic (O-Hg) mercury concentrations in urine, blood, and hair after 0, 4, 8, 17, and 23 months of exposure. Both I-Hg and O-Hg concentrations in urine and hair did not increase significantly even after 23
-
7. Female reproductive health in two lamp factories: effects of exposure to inorganic mercury vapour and stress factors.
To evaluate the possible influence of mercury vapour on female reproduction, 153 women working in a mercury vapour lamp factory have been compared with 193 women employed in another factory of the same company, where mercury was not used. Both groups of subjects were exposed to stress factors (noise, rhythms of production, and shift work). The production pro
-
8. Urinary excretion of mercury after occupational exposure to mercury vapour and influence of the chelating agent meso-2,3-dimercaptosuccinic acid (DMSA).
The spontaneous and chelator mediated excretion of mercury in urine was investigated in male subjects occupationally exposed to mercury vapour (alkaline battery and chloralkali plants) who did not exhibit any sign of kidney damage. The time course of the spontaneous elimination of mercury in urine was examined in seven workers (age 22-40) who had been remove
-
9. The Distribution and Excretion of Inhaled Mercury Vapour
Rats have been exposed for varying periods to an atmosphere containing 1 mg./cu.m. mercury vapour. The toxic effects produced showed resemblances to signs of mercurialism in man. An attempt has been made to study the kinetics of absorption and excretion of mercury from measurements of the amounts excreted and stored in the tissues.
-
10. The effect of occupational exposure to mercury vapour on the fertility of female dental assistants.
Exposure to mercury vapour or inorganic mercury compounds can impair fertility in laboratory animals. To study the effects of mercury vapour on fertility in women, eligibility questionnaires were sent to 7000 registered dental assistants in California. The final eligible sample of 418 women, who had become pregnant during the previous four years, were interv
-
11. Residual neurobehavioural effects associated with chronic exposure to mercury vapour.
To find the residual effects of long term exposure to mercury vapour, neurobehavioural tests were given to ex-mercury miners about 18 years after the end of mercury exposure. Seventy six male ex-mercury miners who had been exposed to high concentrations of mercury vapour (over 1.0 mg/m3) and with a history of mercury intoxication were compared with controls
-
12. EEG findings in chlor-alkali workers subjected to low long term exposure to mercury vapour.
The cerebral effect of long term (mean 15.6, SD 8.9 years) and low (about 25 micrograms/m3 air) exposure to mercury vapour was studied in a group of 41 workers in a chlor-alkali plant and in a group of matched referents by electroencephalography (EEG). In the visually interpreted EEGs only a tendency for an increased number of EEG abnormalities, especially f