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Your search keyword '"Quintella, Cristina M."' showing total 3 results
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3 results on '"Quintella, Cristina M."'

1. Selective inhibition of paraffin deposition under high flow rate as a function of the crude oil paraffin type and content by fluorescence depolarization: Polypropylene and high-density polyethylene

Author

Quintella, Cristina M., Lima, Angelo M.V., and Silva, Eduardo B.

Subjects
Polypropylene -- Chemical properties, Chemical reactions -- Research, Chemicals, plastics and rubber industries
Abstract

High-density polyethlene (HDPE) and polypropylene (PP) were studied to identify tailor-made materials for walls of pipelines and ducts for crude paraffinic oil that inhibit paraffin depositions. The static and the dynamic interfacial tensions were observed, by traditional contact angle measurements and by fluorescence depolarization of the natural fluorescent probes of the crude oil, flowing at a high rate.

Published
2006

2. Fluorescence depolarization investigation of the lobed jet 90-degree twists and structural features

Author

Quintella, Cristina M., Paula, Ana, Musse, S., and Goncalves, Cristiane C.

Subjects
Hydrodynamics -- Research, Ethylene -- Chemical properties, Chemical reactions, Polarization (Electricity), Chemicals, plastics and rubber industries
Abstract

A study of lobe-forming liquid jets of ethylene glycol emerging from narrow slit-shaped nozzles is reported. It was observed that increase in jet velocity elongates the lobes but does not change their number and also the insights in molecular reactions can be valuable in controlling chemical reactions.

Published
2004

3. Observation of the effect of wetting efficiency on a flow of liquids impinging on solid substrates by fluorescence depolarization

Author

Quintella, Cristina M., Goncalves, Cristiane C., Castro, Martha T.P.O., Pepe, Iuri M., Musse, Ana P.S., and Lima, Angelo M.V.

Subjects
Surface tension -- Research, Thin films -- Research, Dielectric films -- Research, Laser photochemistry -- Research, Chemistry, Physical and theoretical -- Research, Cluster analysis, Chemicals, plastics and rubber industries
Abstract

An evaluation of the polarised laser-induced fluorescence (PLF-FI) efficiency for the study of the dynamic interfacial tention of liquid thin films flowing without boundaries on solid substrates is presented. Hierarchic cluster analysis (HCS) showed that, as adhesion decreased, similarity among the polarization maps increased.

Published
2003

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