Inorganic Deposits
Mostrando 1-10 de 10 artigos, teses e dissertações.
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1. ESTUDO DA FORMAÇÃO DE DEPÓSITOS INORGÂNICOS EM CAMPOS PETROLÍFEROS. / STUDY OF FORMATION OF INORGANIC DEPOSITS IN PETROLEUM FIELDS.
Grande parte da produção mundial de petróleo e gás vem hoje de plataformas continentais, incluindo as bacias marginais atlânticas da Costa Brasileira. Na Bacia de Campos é intensa a utilização da injeção de água do mar para recuperação secundária e, como consequência, haverá um significativo incremento da quantidade de água produzida nas pr�
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/11/2012
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2. Abrasão, desgaste e atrito sob deslizamento de recobrimentos preparados por aspersão térmica a partir de PET pós-consumo
This work intends to contribute to the development of polymer coatings by combustion thermal spraying of recycled poly(ethylene terephthalate) PET for the improvement of the tribological behavior of carbon steel piping. Coatings with high wear resistance may reduce corrosion, the formation of organic and inorganic deposits, and the friction of the transporte
Publicado em: 2008
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3. Utilização do composto de resíduos da poda da arborização urbana em substratos para produção de mudas. / Utilization of the compost of residues from the pruning of the urban trees in substrate, for the production of seedling.
The discarding of materials by the humanity is increasing. Cultural, economic and population factors contribute for volumetric formation of these materials. To minimize the effect of the accumulation of these materials in the garbage deposits, public politics must be implemented to enlarge the recycling of inorganic materials and the composting of the organi
Publicado em: 2007
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4. Influence of Calcification Solution on in vitro Chitosan Mineralization
The influence of the calcification solution on the mineralization of chitosan membranes was analysed. Two factors were studied: pH and chemical composition (excess of calcium or phosphate ions) of solutions. Substrates (membranes) of chitosan underwent mineralization by soaking in calcification solutions for 7 days at 36.5 °C. As expected, SEM-EDS analyses
Materials Research. Publicado em: 2002-03
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5. Extraosseous calcification. Evidence for abnormal pyrophosphate metabolism in uremia.
The inorganic constituents and crystalline features of extraosseous calcium-phosphate deposits obtained from dialyzed uremic and hypercalcemic patients were studied. Visceral calcification (heart, lung, and kidney) in hypercalcemic patients exhibited either an amorphous or apatitic X-ray diffraction pattern. Uremic visceral calcification consistently gave an
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6. Ultrastructural Evidence for Calcium Phosphate Deposition by Isolated Corn Shoot Mitochondria 1
This study demonstrates that isolated corn (Zea mays L. Wf9 xM14) shoot mitochondria will accumulate calcium phosphate crystals in vitro that are comparable to those observed in both in vivo and in vitro animal mitochondria. The intensity of deposition, as observed by electron microscopy, increased with incubation time, substrate concentration, and concentra
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7. Scanning electron microscopy and x-ray microanalysis of mineral deposits in lungs of a patient with pleural mesothelioma.
Scanning electron microscopy of lung tissue, ashed at low temperature, and obtained from an insulation worker who had died of pleural mesothelioma, showed the presence of numerous inorganic particles and fibres. A regional variation in fibre concentration in different tissue samples was found, and the size distribution of naked fibres and asbestos bodies was
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8. The effects of exercise on protein and electrolyte secretion in parotid saliva.
1. Ten subjects collected ten 1 min samples of parotid saliva at a constant flow rate 1-2 hr before exercise, immediately after running 3-8 miles and 3 hr after exercise. 2. Exercise had no significant effects on the concentration of sodium, potassium, calcium, magnesium, chloride, bicarbonate or inorganic phosphate. 3. Exercise caused a marked elevation in
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9. Formation of calcium pyrophosphate crystals in vitro: implications for calcium pyrophosphate crystal deposition disease (pseudogout)
Little is known about how calcium pyrophosphate dihydrate (CaPPD) crystals form in vivo and give rise to chondrocalcinosis or pseudogout (pyrophosphate arthropathy or calcium pyrophosphate crystal deposition disease). In this study a simple method has been devised to define the conditions necessary for the deposition of crystals in vitro. Crystal formation i
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10. Behaviour of indicators of exposure and effect after cessation of occupational exposure to lead.
The behaviour of blood lead (PbB) and of some indicators of effect (erythrocyte protoporphyrin IX (EP), delta-aminolaevulinic acid dehydratase activity of erythrocytes (ALAD), and urinary delta-aminolaevulinic acid (ALAU)) were studied in subjects who had ceased working with inorganic lead for at least one year. Relations between these indices and chelatable