Effect of sunflower lecithins on the stability of water-in-oil and oil-in-water emulsions

2002 ◽  
Vol 5 (2) ◽  
pp. 135-143 ◽  
Author(s):  
L. G. Pan ◽  
M. C. Tomás ◽  
M. C. Añón
Keyword(s):  
Oil In Water ◽  
The Stability ◽  
Stability Of Water

Improvement of the stability of water-in-oil-in-water multiple emulsions by the addition of surfactants in the internal aqueous phase of the emulsions

1993 ◽  
Vol 93 (1-3) ◽  
pp. 61-74 ◽  
Author(s):  
Takayuki Ohwaki ◽  
Ryouichi Machida ◽  
Hiroshi Ozawa ◽  
Yoshiaki Kawashima ◽  
Tomoaki Hino ◽  
...  
Keyword(s):  
Aqueous Phase ◽  
Multiple Emulsions ◽  
Oil In Water ◽  
The Stability ◽  
Stability Of Water

Effect of particle concentration on the stability of water-based SiO2 nanofluid

2021 ◽  
Vol 379 ◽  
pp. 457-465
Author(s):  
Tiancheng Zhang ◽  
Quanle Zou ◽  
Zhiheng Cheng ◽  
Zihan Chen ◽  
Ying Liu ◽  
...  
Keyword(s):  
Particle Concentration ◽  
Water Based ◽  
The Stability ◽  
Stability Of Water

scholarly journals Vertical Density Inhomogeneity of Kama Reservoir Water Masses in the Region of Berezniki: Possible Genesis and Influence on the Stability of Water Use

2021 ◽  
Vol 1945 (1) ◽  
pp. 012029
Author(s):  
A P Lepikhin ◽  
T P Lyubimova ◽  
A V Bogomolov ◽  
Yu S Lyakhin ◽  
A A Tiunov ◽  
...  
Keyword(s):  
Water Use ◽  
Water Masses ◽  
Density Inhomogeneity ◽  
Reservoir Water ◽  
Vertical Density ◽  
The Stability ◽  
Stability Of Water

scholarly journals Influence of Whey Protein Micro-Gel Particles and Whey Protein Micro-Gel Particles-Xanthan Gum Complexes on the Stability of O/W Emulsions

Polymers ◽  
2021 ◽  
Vol 13 (14) ◽  
pp. 2301
Author(s):  
Man Zhang ◽  
Bin Liang ◽  
Hongjun He ◽  
Changjian Ji ◽  
Tingting Cui ◽  
...  
Keyword(s):  
Oxidative Stability ◽  
Whey Protein ◽  
High Speed ◽  
Xanthan Gum ◽  
Physical Stability ◽  
Theoretical Support ◽  
Gel Particles ◽  
Oil In Water ◽  
The Stability ◽  
The Impact

Appropriate pretreatment of proteins and addition of xanthan gum (XG) has the potential to improve the stability of oil-in-water (O/W) emulsions. However, the factors that regulate the enhancement and the mechanism are still not clear, which restricts the realization of improving the emulsion stability by directional design of its structure. Therefore, the effects of whey protein micro-gel particles (WPMPs) and WPMPs-XG complexes on the stability of O/W emulsion were investigated in this article to provide theoretical support. WPMPs with different structures were prepared by pretreatment (controlled high-speed shear treatment of heat-set WPC gels) at pH 3.5–8.5. The impact of initial WPC structure and XG addition on Turbiscan Indexes, mean droplet size and the peroxide values of O/W emulsions was investigated. The results indicate that WPMPs and XG can respectively inhibit droplet coalescence and gravitational separation to improve the physical stability of WPC-stabilized O/W emulsions. The pretreatment significantly enhanced the oxidative stability of WPC-stabilized O/W emulsions. The addition of XG did not necessarily enhance the oxidative stability of O/W emulsions. Whether the oxidative stability of the O/W emulsion with XG is increased or decreased depends on the interface structure of the protein-XG complex. This study has significant implications for the development of novel structures containing lipid phases that are susceptible to oxidation.

scholarly journals Polymeric Micelles for the Enhanced Deposition of Hydrophobic Drugs into Ocular Tissues, without Plasma Exposure

Pharmaceutics ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 744
Author(s):  
Ijeoma F. Uchegbu ◽  
Jan Breznikar ◽  
Alessandra Zaffalon ◽  
Uche Odunze ◽  
Andreas G. Schätzlein
Keyword(s):  
Polymeric Micelles ◽  
Rabbit Model ◽  
Penetration Enhancer ◽  
Hydrophobic Drugs ◽  
Ocular Tissues ◽  
Ocular Penetration ◽  
Self Assembling ◽  
Similar Dose ◽  
Oil In Water ◽  
The Stability

Commercial topical ocular formulations for hydrophobic actives rely on the use of suspensions or oil in water emulsions and neither of these formulation modalities adequately promote drug penetration into ocular tissues. Using the ocular relevant hydrophobic drug, cyclosporine A (CsA), a non-irritant ocular penetration enhancer is showcased, which may be used for the formulation of hydrophobic actives. The activity of this penetration enhancer is demonstrated in a healthy rabbit model. The Molecular Envelope Technology (MET) polymer (N-palmitoyl-N-monomethyl-N,N-dimethyl-N,N,N-trimethyl-6-O-glycolchitosan), a self-assembling, micelle-forming polymer, was used to formulate CsA into sterile filtered nanoparticulate eye drop formulations and the stability of the formulation tested. Healthy rabbits were dosed with a single dose of a MET–CsA (NM133) 0.05% formulation and ocular tissues analyzed. Optically clear NM133 formulations were prepared containing between 0.01–0.1% w/v CsA and 0.375–0.75% w/v MET polymer. NM133 0.01%, NM133 0.02% and NM133 0.05% were stable for 28 days when stored at refrigeration temperature (5–6 °C) and room temperature (16–23 °C), but there was evidence of evaporation of the formulation at 40 °C. There was no change in drug content when NM133 0.05% was stored for 387 days at 4 °C. On topical dosing to rabbits, corneal, conjunctival and scleral AUC0–24 levels were 25,780 ng.h g−1, 12,046 ng.h g−1 and 5879 ng.h g−1, respectively, with NM133 0.05%. Meanwhile, a similar dose of Restasis 0.05% yielded lower values of 4726 ng.h/g, 4813 ng.h/g and 1729 ng.h/g for the drug corneal, conjunctival and scleral levels, respectively. NM133 thus delivered up to five times more CsA to the ocular surface tissues when compared to Restasis. The MET polymer was non-irritant up to a concentration of 4% w/v. The MET polymer is a non-irritant ocular penetration enhancer that may be used to deliver hydrophobic drugs in optically clear topical ocular formulations.

Co-adsorption behavior of asphaltenes and carboxylic acids with different alkyl chain lengths and its effects on the stability of water/model oil emulsion

Fuel ◽  
2021 ◽  
Vol 295 ◽  
pp. 120603
Author(s):  
Daiwei Liu ◽  
Hao Zhang ◽  
Yujiang Li ◽  
Chuanxian Li ◽  
Xinya Chen ◽  
...  
Keyword(s):  
Carboxylic Acids ◽  
Alkyl Chain ◽  
Co Adsorption ◽  
Adsorption Behavior ◽  
Water Model ◽  
Oil Emulsion ◽  
The Stability ◽  
Model Oil ◽  
Stability Of Water ◽  
Chain Lengths

scholarly journals Assessment of Fennel Oil Microfluidized Nanoemulsions Stabilization by Advanced Performance Xanthan Gum

Foods ◽  
2021 ◽  
Vol 10 (4) ◽  
pp. 693
Author(s):  
Rubén Llinares ◽  
Pablo Ramírez ◽  
José Antonio Carmona ◽  
Luis Alfonso Trujillo-Cayado ◽  
José Muñoz
Keyword(s):  
Essential Oil ◽  
Rheological Properties ◽  
Xanthan Gum ◽  
Mechanical Energy ◽  
Physical Stability ◽  
Processing Condition ◽  
Oil In Water ◽  
Mechanical Spectra ◽  
The Stability ◽  
Fennel Oil

In this work, nanoemulsion-based delivery system was developed by encapsulation of fennel essential oil. A response surface methodology was used to study the influence of the processing conditions in order to obtain monomodal nanoemulsions of fennel essential oil using the microchannel homogenization technique. Results showed that it was possible to obtain nanoemulsions with very narrow monomodal distributions that were homogeneous over the whole observation period (three months) when the appropriate mechanical energy was supplied by microfluidization at 14 MPa and 12 passes. Once the optimal processing condition was established, nanoemulsions were formulated with advanced performance xanthan gum, which was used as both viscosity modifier and emulsion stabilizer. As a result, more desirable results with enhanced physical stability and rheological properties were obtained. From the study of mechanical spectra as a function of aging time, the stability of the nanoemulsions weak gels was confirmed. The mechanical spectra as a function of hydrocolloid concentration revealed that the rheological properties are marked by the biopolymer network and could be modulated depending on the amount of added gum. Therefore, this research supports the role of advanced performance xanthan gum as a stabilizer of microfluidized fennel oil-in-water nanoemulsions. In addition, the results of this research could be useful to design and formulate functional oil-in-water nanoemulsions with potential application in the food industry for the delivery of nutraceuticals and antimicrobials.

Electrically driven jets

1969 ◽  
Vol 313 (1515) ◽  
pp. 453-475 ◽  
Keyword(s):  
Electric Field ◽  
Soap Film ◽  
Radial Electric Field ◽  
Viscous Fluids ◽  
Critical Fields ◽  
Water Jets ◽  
Viscous Jets ◽  
The Stability ◽  
Stability Of Water ◽  
Long Cylinder

Fine jets of slightly conducting viscous fluids and thicker jets or drops of less viscous ones can be drawn from conducting tubes by electric forces. As the potential of the tube relative to a neighbouring plate rises, viscous fluids become nearly conical and fine jets come from the vertices. The potentials at which these jets or drops first appear was measured and compared with calculations. The stability of viscous jets depends on the geometry of the electrodes. Jets as small as 20 μm in diameter and 5 cm long were produced which were quite steady up to a millimetre from their ends. Attempts to describe them mathematically failed. Their stability seems to be due to mechanical rather than electrical causes, like that of a stretched string, which is straight when pulled but bent when pushed. Experiments on the stability of water jets in a parallel electric field reveal two critical fields, one at which jets that are breaking into drops become steady and another at which these steady jets become unsteady again, without breaking into drops. Experiments are described in which a cylindrical soap film becomes unstable under a radial electric field. The results are compared with calculations by A. B. Basset and after a mistake in his analysis is corrected, agreement is found over the range where experiments are possible. Basset’s calculations for axisymmetrical disturbances are extended to those in which the jet moves laterally. Though this is the form in which the instability appears, calculations about uniform jets do not seem to be relevant. In an appendix M. D. Van Dyke calculates the attraction between a long cylinder and a perpendicular plate at a different potential.

scholarly journals Impact of emulsifier-polysaccharide interactions on the stability and rheology of stabilised oil-in-water emulsions

2011 ◽  
Vol 1 ◽  
pp. 57-61 ◽  
Author(s):  
Kyriaki G. Zinoviadou ◽  
Thomas Moschakis ◽  
Vassilios Kiosseoglou ◽  
Costas G. Biliaderis
Keyword(s):  
Oil In Water ◽  
The Stability
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