Antifoams
Mostrando 1-4 de 4 artigos, teses e dissertações.
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1. Estudos da atividade antiespumante de ésteres etílicos derivados de óleos vegetais / Estudo da atividade antiespumante de ésteres etílicos derivados de óleos vegetais
Gas-liquid foams are colloidal systems formed by air bubbles separated by a liquid thin film stabilized by surfactants, which are often found in many industrial processes. It becomes often necessary the use of antifoams to avoid loses of material or loses in the processs efficiency caused by a large foam production. The foaming mixtures utilized in this work
Publicado em: 2008
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2. Drenagem de espumas gás-líquidos e influência da presença de partículas e anti-espumantes / Air-liquid foams drainage and influence of the presence of particles and antifoams
This Dissertation presents results of two comercial antifoams on the stability of gas-liquid foams formed in the presence of an anionic surfactant, a non-ionic surfactant and colloidal particles. Air-liquid foams are colloidal systems formed by air bubbles separated by liquid films. The drainage or flow of the liquid contained within these films pass through
Publicado em: 2007
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3. Unique susceptibility of Helicobacter pylori to simethicone emulsifiers in alimentary therapeutic agents.
Helicobacter pylori is killed in vitro by polyoxyethylene acyl esters and ethers similar to simethicone emulsifiers in therapeutic antifoams. The MBC of these compounds for Helicobacter pylori was less than 20 micrograms/ml, while other gram-negative bacteria were unaffected by much higher concentrations of up to 50 mg/ml.
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4. Growth and Survival of Helicobacter pylori in Defined Medium and Susceptibility to Brij 78
The gastrointestinal pathogen Helicobacter pylori requires supplementation with either fetal calf serum (FCS), bovine serum albumin (BSA), or (2,6-dimethyl)-β-cyclodextrin (CD) for growth in a complex or defined medium. Because the availability of medium in which all components were chemically defined would facilitate metabolic studies of H. pylori, growth
American Society for Microbiology.