Murilo da Silva Dantas

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In this work, a novel procedure is developed to determine the amount of salt for crude oils in which the available laboratory techniques are unable to provide accurate salt content values. The technique is based on measuring the salinity of the wash water that is vigorously mixed with the crude oil (forming an emulsion) and then separating it from the(More)
Surface-active compounds of biological origin are widely used for many industries (cosmetic, food, petrochemical). The Saccharomyces lipolytica CCT-0913 was able to grow and produce a biosurfactant on 5% (v/v) diesel-oil at pH 5.0 and 32C. The cell-free broth emulsified and stabilized the oil-in-water emulsion through a first order kinetics. The results(More)
This work presents biochemical characterization of a lipase from a new strain of Bacillus sp. ITP-001, immobilized using a sol gel process (IB). The results from the biochemical characterization of IB showed increased activity for hydrolysis, with 526.63 U g at pH 5.0 and 80 °C, and thermal stability at 37 °C. Enzymatic activity was stimulated by ions such(More)
−A mathematical model was developed to predict breakthrough curves during purification of the two chitosanases from Metarhizium anisopliae by expanded bed adsorption, taking into account the axial dispersion of liquid and using Streamline DEAE and SP XL adsorbents, anion and cation exchange resins, respectively. All the experiments were performed without(More)
Introduction: Considered as a neglected disease by the WHO, visceral leishmaniasis (VL) has expanded and urbanized. Its transmission and expansion have been linked to several factors. Objective: To evaluate the epidemiological aspects of VL in the city of Aracaju/SE, through retrospective studies of the historical series of human and canine VL in the(More)
In this work, the mutual solubilities of sets of ionic liquids ([CnMIM] [TF2N] (n = 4, 8, 12), [C4PY] [TF2N], [C8MIM] [OTF]) and organic compounds (heptane, o-xylene, toluene, or water) are investigated. The experimental data measured for these systems were used to adjust the binary interaction parameters between their components for the Non-Random Two(More)
5-(Oxiran-2-ilmetil)-1,3-benzodioxol ou epóxi-safrol (SO) vem sendo estudado ao longo dos anos devido a suas propriedades dependentes da concentração, como indução à apoptose e transdiferenciação celular. A coprecipitação do SO com um polímero biodegradável e biocompatível, poli(3-hidroxibutirato-co-3-hidroxivalerato) (PHBV), foi realizada utilizando a(More)
This work reports high-pressure cloud point data for the quaternary system glycerol + olive oil + n-butane + AOT surfactant. The static synthetic method, using a variable-volume view cell, was employed for obtaining the experimental data at pressures up to 27 MPa. The effects of glycerol/olive oil concentration and surfactant addition on the pressure(More)
a Electrochemistry and Nanotechnology Laboratory, Research and Technology Institute/Processes Engineering Post-graduation, Universidade Tiradentes, Av. Murilo Dantas, 300, Aracaju, SE, Brazil b MCMA group, Department of Inorganic Chemistry, Faculty of Sciences, University of Alicante, Ap. 99 E-03080, Alicante, Spain c Grupo Catalizadores y Adsorbentes,(More)