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371 28 36 Vladisavljevic , G.T. & Williams , R.A. (2005): Recent developments in manufacturing emulsions and particulate products using

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Abstract  

Using the nephelometric sedimentation analytical method, the emulsions dispersity was investigated. These emulsions were formed in a centrifugal extractor mixing chamber with different extraction systems: TBP in kerosene—HNO3 and TBP in CCl4−HNO3. The TBP and HNO3 concentration, the speed of rotation and the supply of the mixing chamber with the phases stream influence on the histeresis loop of the emulsion type and the emulsion dispersity was described. The foaminess of extraction systems was investigated, and the stabilizing influence of w/o emulsions on the foaminess was confirmed.

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Abstract  

The influence of zirconium ions on the stability of the primary emulsion in model extraction systems was examined. Zirconium ions in the systems containing TBP only cause a slight increase of the stability of the primary emulsions. The addition of MBP brings about precipitation of sediments that fix the emulsions and make phase separation difficult. The addition of DBP increases the stability of the primary emulsion. Kerosene as the diluent of TBP increases the stability of the primary emulsions more than carbon tetrachloride.

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Hung, S.C. & Zayas, J.F. (1991): Emulsifying capacity and emulsion stability of milk protein and corn germ protein flour. J. Fd Sci. , 56 , 1216–1218. Zayas J

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. Pre-emulsification, a process of preparing oil-in-water emulsion prior to be incorporated in a meat product, is a practical means to add vegetable oils into comminuted meat products. The non-meat proteins used to stabilise pre-emulsified emulsions play

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We studied thermal transitions and physical stability of oil-in-water emulsions containing different milk fat compositions, arising from anhydrous milk fat alone (AMF) or in mixture (2:1 mass ratio) with a high melting temperature (AMF–HMT) or a low melting temperature (AMF–LMT) fraction. Changes in thermal transitions in bulk fat and emulsion samples were monitored by differential scanning calorimetry (DSC) under controlled cooling and reheating cycles performed between 50 and –45C (5C min–1). Comparison between bulk fat samples and emulsions indicated similar values of melting completion temperature, whereas initial temperature of fat crystallization (T onset) seemed to be differently affected by storage temperature depending on triacylglycerols (TAG) composition. After storage at 4C, T onset values were very similar for emulsified and non-emulsified AMF–HMT blend, whereas they were lower (by approx. 6C) for emulsions containing AMF or mixture of AMF–LMT fraction. After storage at –30C, T onset values of re-crystallization were higher in emulsion samples than in bulk fat blends, whatever the TAG fat composition. Light scattering measurements and fluorescence microscopic observations indicated differences in fat droplet aggregation-coalescence under freeze-thaw procedure, depending on emulsion fat composition. It appeared that under quiescent freezing, emulsion containing AMF–LMT fraction was much less resistant to fat droplet aggregation-coalescence than emulsions containing AMF or AMF–HMT fraction. Our results indicated the role of fat droplet liquid-solid content on emulsion stability.

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Journal of Thermal Analysis and Calorimetry
Authors: Robson Miranda da Gama, Tatiana Santana Balogh, Simone França, Tânia Cristina Sá Dias, Valcinir Bedin, André Rolim Baby, Jivaldo do Rosário Matos, and Maria Valéria Robles Velasco

after the use of cosmetics treatments. This research the effect of oxidative hair dye emulsions, with or without conditioning agents on Caucasian hair. The hair was analyzed by DSC, TG, and Derivative Thermogravimetric (DTG) analysis

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, characterization and thermal properties of highly crosslinked, hydrophilic stable spherical microspheres based on the new aromatic tetrafunctional methacrylate monomers and divinylbenzene (DVB) prepared by emulsion–suspension polymerization in the presence of pore

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Abstract  

A method is described by which the stability of emulsions can be measured by a modified liquid scintillation counter. The Ra 226 external standard source of a commercially available equipment, fixed in the measuring position, is used for the production of Cerenkov radiation in a sample of an emulsion. This Cerenkov radiation is absorbed by the sample due to its turbidity. The turbidity of emulsions follows a typical course with time designated as creaming-up-curve. These curves can be registrated automatically in digital form.

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Abstract  

The recovery of uranium(VI) from chloride solution using a liquid emulsion membrane (LEM) technique was studied. The emulsion is constituted by the quaternary salt of benzyloctadecyldimethyl ammonium chloride (BODMAC, R4NCl) as a carrier, kerosene as organic diluent, Span 80 as emulsifying agent and 0.5 mol/l Na2CO3 as stripping phase. The important variables affecting the LEM permeation process such as the concentrations of extractant, internal strip phase, types of organic diluent, and the presence of magnesium chloride or magnesium sulfate were investigated. It was found that, at a given condition, the maximum extraction rate of uranium(VI) reached 80%. The emulsion was stable at low pH in the presence of certain amounts of electrolytes such as NaCl and MgCl2.

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