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| Canto,Gizele Scotti do; Treter,Janine; Yang,Samanta; Borré,Gustavo Luís; Peixoto,Maria Paula Garofo; Ortega,George González. |
| Saponins are natural compounds able to form abundant foam, a desirable quality required in some chemical, foods, cosmetic and pharmaceutical processes. Ilex paraguariensis A. St. Hil. (Aquifoliaceae) known as mate, is a South American widely cultivated specie due to the preparation of a tea-like beverage from its leaves. Moreover, its green fruits are a rich source of non-toxic and very low haemolytic saponins. In this study, mate saponin fraction (MSF) was evaluated as a foam former, focusing on its foamability, foam lifetime, and film drainage in the presence of different electrolytes (ionic strength I = 0.024 M). Sodium dodecyl sulphate (SDS) and polysorbate 80 (Poly-80) were used as reference surfactants. The critical micelle concentration (CMC), the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ilex paraguariensis; Aquifoliaceae; Mate; Saponins; Surfactants; Foam; Assay. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502010000200010 |
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| Divanach, P.; Sube, J.. |
| Four marine phytoplanctonic cultures from natural inoculum of Nannodito sp. have been submitted to different fertilizers in identical light and temperature conditions. The composition of enrichments has been studied to introduce Nitrogen as comparative factor. One tank without nutrients and three enriched cultures, the first only with sodium nitrate, the second with "Conway medium" and the last in which nutrients were provided by convenient dilution of "foam", have been followed for physical, chemical, biological parameters during three months. Temperature, pH, dissolved oxygen, optical density, particulate matters, Organic Carbon, Nitrogen, Phos phorus, Calcium, Magnesium, Sodium, Potassium, metal traces and biological parameters were analysed... |
| Tipo: Text |
Palavras-chave: Enrichissements; Recyclage; Écume; Phytoplancton; Déchets; Aquaculture; Enrichments; Recycling; Foam; Phytoplankton; Wastes; Aquaculture. |
| Ano: 1979 |
URL: http://archimer.ifremer.fr/doc/00305/41662/42780.pdf |
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| Camps, A; Vall-ilossera, M; Villarino, R; Reul, Nicolas; Chapron, Bertrand; Corbella, I; Duffo, N; Torres, F; Miranda, Jj; Sabia, R; Monerris, A; Rodriguez, R. |
| Sea surface salinity can be measured by microwave radiometry at L-band (1400-1427 MHz). This frequency is a compromise between sensitivity to the salinity, small atmospheric perturbation, and reasonable pixel resolution. The description of the ocean emission depends on two main factors: 1) the sea water permittivity, which is a function of salinity, temperature, and frequency, and 2) the sea surface state, which depends on the wind-induced wave spectrum, swell, and rain-induced roughness spectrum, and by the foam coverage and its emissivity. This study presents a simplified two-layer emission model for foam-covered water and the results of a controlled experiment to measure the foam emissivity as a function of salinity, foam thickness, incidence angle, and... |
| Tipo: Text |
Palavras-chave: Brightness temperature; Emission; Foam; Microwave radiometry; Salinity; Sea. |
| Ano: 2005 |
URL: http://archimer.ifremer.fr/doc/00000/10940/9268.pdf |
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