Determinación de la cmc. La concentración micelar crítica (cmc) de un tensioactivo puede ser determinada por numerosos métodos que utilizan las diferencias. CONCENTRACIÓN MICELAR CRÍTICA DE UN SURFACTANTE ESQUEMA MOLECULAR DE LA TENSIÓN SUPERFICIAL ECUACIÓN DE LA. micelles and is known as the critical micelle concentration (CMC). commonly used surfactants the CMC is typically less than about M (e.g. sodium.

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Biosurfactants have advantages over chemical surfactants due to their compatibility with the environment, low toxicity and biodegradability.

Nova25 On a metabolic product of Ps. Effect of the carbon source on biosurfactant production by Pseudomonas aeruginosa 44T1. En la agricultura, los biotensoactivos son aplicados debido a su actividad insecticida y herbicida.

Towards commercial production of microbial surfactants. Aunque una amplia gama de microorganismos son capaces de sintetizar biotensoactivos, las bacterias son las principales productoras.

However, now the counterions play an important role acting as effective jicelar quenchers already below the CMC. Like membranes, micelles are highly cooperative, dynamic, organized molecular assemblies, where hydrophobic interactions play an important role. Biosurfactants production and possible uses in microbial enhanced oil recovery and oil pollution remediation: Effect of combined nutrients on biosurfactant produced by Pseudomonas putida.

The properties concentrzcion surfactants are characterized principally by four parameters: Otros biotensoactivos y sus microorganismos productores. Estas dos clases de biotensoactivos poseen actividad antibacteriana debido a su capacidad de solubilizar enzimas de membrana. Effect of biodispersan in grinding limestone and making paper.


Biosurfactant production by a soil Pseudomonas strain growing on polycyclic aromatic hydrocarbons. Varios tipos de microorganismos, incluyendo bacterias, levaduras y hongos, poseen un metabolismo capaz de producir biotensoactivos Correa et al. Bacillus subtilis produce surfactina con sacarosa como fuente de carbono Makkar y Cameotra In the case of cationic surfactants the behaviour is, at first sight, similar.

In this paper the chemical and microbiological properties of surfactants and biosurfactants are described as well as biosurfactant applications, principally in the bioremediation field. We confirm that micelles act as soft-cages with a diffusion controlled concentracionn constant of the dye-micelle association.

Production of biosurfactant at mesophilic and thermophilic conditions by a strain of Bacillus subtilis.

Cultivaron cepas de Flavobacterium sp. An update on the use of unconventional substrates for biosurfactant production and their new applications.

Mercedes Novo and Wajih Al-Soufi Dye micelle interaction The interaction of the moderately hydrophobic cationic dye R with surfactants of differently charged head groups shows a behaviour of surprising variety. Effect of inoculation on the biodegradation of weathered Prudhoe Bay crude oil. Scale up studies for the production of biosurfactant in packed column bioreactor. As amostras de HAs estudadas foram provenientes de turfa e vermicomposto.

Micellar Systems

Determination of the critical micelle concentration of humic acids by spectroscopy and conductimetric measurements. Microorganismos como Acinetobacter spp. Recent advances in petroleum microbiology.

New York,p. Por ejemplo, la solubilidad del octadecano en agua es de 0. Ejemplo de concenttracion actividad son los productos utilizados por la empresa Rhamnolipods Co. The fluorescence emission of pyrene in micellar solutions fluorescence intensity, band ratio, excimer formation and fluorescence lifetimes are studied in detail. Carlos Penedo visits us.


Structure of a rhamnolipid from Pseudomonas aeruginosa. Environmental importance of rhamnolipid production from molasses as a carbon source. Exchange-dynamics of a neutral hydrophobic dye in micellar solutions studied by Fluorescence Correlation Spectroscopy.

Identification and characterization of a soil bacterium with extracellular emulsifying activity. Biosurfactants, more in demand than ever. The use of a general concentration model eliminates subjective graphical procedures, reduces methodological differences, and thus allows one to compare directly the results of different techniques or to perform global fits.

Propiedades , aplicaciones y producción de biotensoactivos: una revisión

At higher concentrations more and more small dye-surfactant aggregates are formed with photophysical properties similar to those of the dye bound to fully formed micelles. Surface active properties of a biosurfactant from Corynebacterium lepus. Bioremediation of contaminated soils.

The value of the critical micellization concentration can depend, to a certain extent, on the property under consideration and on the concentrracion chosen to measure this property.