Hydrogen Sulphide
Mostrando 1-12 de 31 artigos, teses e dissertações.
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1. Efeitos diferenciais do sulfeto de hidrogênio exógeno e endógeno na sinovite experimental induzida por carragenina em ratos Wistar. / Differential effects of hydrogen sulphide exogenous and endogenous in experimental synovitis induced by carrageenan in Wistar rats.
Este estudo se propôs a avaliar o efeito do gás sulfídrico (H2S), produzido endogenamente em mamíferos, na sinovite induzida pela injeção intra-articular de carragenina (CGN) no joelho de ratos Wistar (250 g). Ratos foram tratados (-60 min) com indometacina, o inibidor da cistationina g-liase DL-propargilglicine (PGly) ou doador de
Publicado em: 2010
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2. Efeitos gastroprotetor e procinÃtico do sulfeto de hidrogÃnio (H2S) em camundongos - papel dos neurÃnios aferentes sensÃveis a capsaicina, receptores vanilÃides do tipo 1 (TRPV1) e canais de k atp-depedentes (KATP). / Gastroprotect and prokinetic effect of hydrogen sulphide (H2S) in mice: role of capsaicin-sensitive afferent neurons, vanilloid receptors type 1 (TRPV1) and K ATP-dependent channels (KATP).
INTRODUÃÃO: Recentemente, foi demonstrado que o H2S està envolvido em inÃmeras funÃÃes fisiolÃgicas e patolÃgicas, sendo produzido em muitos tecidos de mamÃferos. OBJETIVOS: Avaliar o papel do H2S na defesa da mucosa e no controle da motilidade gÃstrica em camundongos, bem como estudar a participaÃÃo dos canais de KATP, dos neurÃnios sensoriais
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 04/12/2009
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3. Biofilter efficiencies in the purification and deodorization of hydrogen sulfide emissions / Desempenho de filtro biológico na depuração e desodorização de emissões de sulfeto de hidrogênio
Traditionally the industrial waste gases have been treated by physical-chemical processes, such as scrubbers, absorption, condensation and oxidation. Although these techniques presented great efficiency, the need to add chemical products and the replacement of adsorbent results in relatively high operational costs compared to biological treatment techniques.
Publicado em: 2007
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4. RemoÃÃo de Sulfeto em uma estaÃÃo de tratamento de efluentes de nÃquel por oxidaÃÃo Ãmida
The waste treatment of electronics components industry that use nickel in your electrochemistry process consist in aplication phisical-chemical metods as precipitation and filtration. This industry of northeast region remove nickel by add sulphide in excess with total precipitation of metal. The oxidation process adoptee by industry for removing this sulphid
Publicado em: 2006
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5. Estudo do desempenho de resinas poliméricas para remoção de H2S do gás natural
O gás natural (GN) é uma fonte de energia limpa encontrada no subsolo de rochas porosas, associado ou não ao petróleo. Sua composição básica inclui metano, etano, propano e outros componentes, como dióxido de carbono, nitrogênio, ácido sulfídrico e água. H2S é um dos poluentes naturais do gás natural. É considerado crítico no que se refere à
Publicado em: 2006
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6. EVALUATION OF API STEEL WELDED JOINTS IN A CORROSIVE MEDIUM / AVALIAÇÃO DA JUNTA SOLDADA DE AÇO API EM MEIO CORROSIVO
The steel tubes used in the Oil Industry are constantly exposed to hydrogen sulphide (H2S) which leads to the diffusion of hydrogen into the steel, provoking hydrogen induced embrittlement cracks and/or stress corrosion cracking. Welded joints, generally considered to be the critical region in pipelines, were evaluated in this study, using slow strain rate t
Publicado em: 2005
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7. Chemical absorption of H2S for biogas purification
This work presents an experimental study of purification of a biogas by removal of its hydrogen sulphide (H2S) content. The H2S was removed by means of chemical absorption in an iron-chelated solution catalyzed by Fe/EDTA, which converts H2S into elemental sulphur (S). Preparation of the catalyst solution and the results of biogas component absorption in the
Brazilian Journal of Chemical Engineering. Publicado em: 2004-09
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8. Caracterização dos fluidos H2S e agua em reservatorios carbonaticos
Reservoir fluids from two basins - Campos and Santos - of East Brazil margin have been studied. Samples from over 16 wells have been utilized in the fluid characterization. Water and hydrogen sulphide (H_) are fluids with large distribution in petroleum fields and may provide important informations for reservoir studies. High H2S concentratios are normally a
Publicado em: 1993
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9. The Eye and Hydrogen Sulphide
An incident in which five men were exposed to hydrogen sulphide and steam is described. Three of the men developed delayed eye effects, and a review of the literature supports the view that these effects were due to hydrogen sulphide.
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10. Hydrogen Sulphide Studies: I. Detection of Hydrogen Sulphide in Cultures
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11. Exposure to hydrogen sulphide and respiratory function.
A study was carried out to assess possible effects of low concentrations of hydrogen sulphide on respiratory function. The cohort comprised 26 male pulp mill workers (mean age 40.3, range 22-60 years) with a daily exposure to hydrogen sulphide in the workplace, and 10 volunteers, who had asthma (three men, mean age 40.7, range 33 to 50 years, and seven women
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12. Hydrogen sulphide poisoning: blood sulphide concentration and changes in haem metabolism.