Lead Sulfide
Mostrando 1-12 de 21 artigos, teses e dissertações.
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1. Design of Three-Layer Antireflection Coating for High Reflection Index Lead Chalcogenide
Antireflection coatings (ARC), not only reduce the reflection of the incident radiation but also protect the surface from environmental degradations. In present study, three- layer design was theoretically calculated and experimentally realized on the surface of lead chalcogenide, which had high refractive characteristics. First the theoretical designs of th
Mat. Res.. Publicado em: 11/11/2019
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2. Films Formed on Carbon Steel in Sweet Environments - A Review
Corrosion of carbon steel pipelines in sweet environments has been extensively researched on oil and natural gas exploration and production in order to obtain efficient corrosion mitigation methods. Although the consequences of corrosion are known, the cause and mechanism by which a certain phenomenon occurs are still not well understood. Sweet corrosion is
J. Braz. Chem. Soc.. Publicado em: 04/07/2019
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3. Carbon steel corrosion induced by sulphate-reducing bacteria in artificial seawater: electrochemical and morphological characterizations
ABSTRACT In this work, the corrosion behavior of carbon steel AISI 1020 was evaluated in artificial seawater in the presence of mixed sulfate-reducing bacteria (SRB) culture isolated from the rust of a pipeline. The corrosion evaluation was performed by electrochemical techniques (open circuit potential (Eocp), polarization curves and electrochemical impedan
Matéria (Rio J.). Publicado em: 2016-12
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4. Synthesis of Star-Shaped Lead Sulfide (PbS) Nanomaterials and theirs Gas-Sensing Properties
Star-shaped PbS nanomaterials are synthesized by a hydrothermal method. Morphology and structure of the PbS nanomaterials are analyzed by SEM, HRTEM and XRD. Gas-sensing properties of the as-prepared PbS sensor are also systematically investigated. The results show star-shaped PbS nanostructure consists of four symmetric arms in the same plane and demonstrat
Mat. Res.. Publicado em: 03/10/2016
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5. Evaluación De La Influencia De Las Condiciones De Fondo De Pozo En El Deterioro De Un Acero API P110, En Ambientes Simulados Del Proceso De Combustión In Situ, Por Gravimetría Y EIS
ABSTRACT Given the large amount of consumption of oil as an energy source, is resulting in a diminution in the existing world oil, the exploitation of heavy oil emerges as new alternative extraction is left aside because of the difficulties associated to processing. Therefore the in situ combustion process is an extraction method that facilitates production
Matéria (Rio J.). Publicado em: 2016-09
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6. Use of Lead (II) Sulfide Nanoparticles as Stabilizer for PMMA Exposed to Gamma Irradiation
Lead (II) sulfide (PbS) were synthesized by sonochemical method and crystals with cubic structure exhibit aggregated nanoparticles with size in the range of 50-100 nm. Commercial Poly(methyl methacrylate) (PMMA) containing the PbS nanoparticles (PbS-NP) exposed to gamma irradiation were investigated and both the viscosity-average molar mass (Mv) and degradat
Mat. Res.. Publicado em: 2015-04
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7. CaracterizaÃÃo FÃsica, QuÃmica e BiolÃgica da Ãgua na Sub-Bacia B1, do Rio CocÃ, Fortaleza-CE, com Ãnfase nos Aspectos da PoluiÃÃo ao Longo de um Ciclo ClimÃtico / Characterization Physical, Chemical and Biological Water in Sub-Basin B1, Rio Coco, Fortaleza-CE, with Emphasis on Aspects of Pollution Along a Climate Cycle
This study aimed to evaluate the physical, chemical, biological, and the occurrence of both the acute toxicity and the diversity and quantity of phytoplankton biomass, along a climatic cycle, on sub-basin B1, a member of the Cocà River basin, Fortaleza - CE. The sampling occurred monthly on fourteen collecting points in the period of September 2010 to April
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/03/2012
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8. Avaliação da composição isotópica do chumbo e da distribuição elementar nos sedimentos da represa Pedro Beicht, Cotia, São Paulo / Evaluation of isotopic composition of lead and elemental distribution in the sediments of the Pedro Beicht reservoir, Cotia, São Paulo
The water reservoir named Pedro Beicht provides water to five hundred thousand people in the metropolitan region of São Paulo city and is known by its excellent aquatic system quality. It is managed by Sanitation Company of São Paulo State (SABESP) and is surrounded by the Forest Reserve Morro Grande (RFMG). The RFMG was created in 1979 to ensure flora and
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 01/06/2011
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9. Os Depósitos de Cu-Au-Mo do tipo pórfiro de Bajo de La Alumbrera e Água Rica, Argentina : considerações genéticas sobre formação e fonte de minério
The world-class deposits of Bajo de la Alumbrera and Agua Rica in NW Argentina, are of the Cu-Au-Mo porphyry type (although Agua Rica has some epithermal characteristics). Both deposits are closely related to the activities and formation processes of the Miocene Farallón Negro Volcanic Complex. They are also controlled by the Tucuman Transfer Zone, which is
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2011
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10. Análise de perda e fluorescência em fibras de cristal fotônico com líquidos e polímeros
Fibras de cristal fotônico (PCFs) têm levado a uma atenção renovada ao campo das fibras ópticas devido às diversas propriedades exclusivas resultantes do seu perfil microestruturado. Em particular, este perfil permite a introdução de líquidos e polímeros na fibra de modo que estes interajam eficientemente com a luz, levando a aplicações em sensor
Publicado em: 2008
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11. Avaliação e síntese de corantes fenotiazínicos para determinação espectrofotométrica de sulfeto e sulfito empregando sistemas de análise em fluxo.
In this work seven aromatic amines O e N-substituted were evaluated at optimized reaction conditions for symmetrics phenothiazinic dyes. DMPD, DEPD, PPD, PAP e PAA were the start reagent, where the yield for phenothiazinic dyes varying from 10% to 43% for different oxidizing (Fe3+ or ClO-), acids (H2SO4 or HBF4) and precipitant agent (ClO4 - or BF4 -). The l
Publicado em: 2004
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12. Production of Hydrogen Sulfide by Streptomyces odorifer
By use of various trapping systems, as well as lead acetate papers, Streptomyces odorifer was shown to produce hydrogen sulfide. Other sulfur-containing compounds may be produced by S. odorifer, but the amounts obtained were too small for detailed analysis. It was suggested that hydrogen sulfide might be a part of the earthy-odor complex produced by S. odori