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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 28 for “"Oil-in-water emulsions"”.
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Cellulose Nanocrystals as 'Green' Emulsifiers Stabilized Crude Oil in Water Emulsions
This study examines the ability of CNC to stabilize crude o/w Pickering emulsions. The effects of concentration of CNC, ionic strength of the aqueous phase, volume fraction of crude oil to water, and the presence of divalent ions on the stability of crude o/w emulsions were examined. Emulsions …
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Sensory Perception of Saltiness and Bitterness in Oil-in-Water Emulsions
… objective of this research was to evaluate saltiness and bitterness perception in oil-in-water emulsion systems. For that purpose, three experiments were performed: A sensory threshold study, a descriptive sensory and physical property evaluation, and a psychophysical assessment of taste …
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T2 Characterization of Oil-In-Water Emulsions for NMR Sensor Applications
… essential aspect of healthcare with implications in chronic conditions such as renal disease and congestive heart failure. Current fluid status determination techniques lack quantitative methods and standards. Our research explores a point-of-care approach through a portable single-sided magnetic …
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Effect of composition on empirical stability trends for oil-in-water emulsions
Relative stabilities of paraffin oil-in-water emulsions were determined empirically as a function of increasing ionic strength, surfactant type or concentration, droplet size, pH and calcium(II) concentration. Stabilities were measured by droplet size changes, planar interface oil droplet …
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Evaluation of Xanthan/Enzymatically Modified Guar Gum Mixtures in Oil-in-Water Emulsions
<p>Oil-in-water emulsions have wide range of applications in food industry because of their structure-forming properties, and as delivery systems of polyunsaturated fatty acids into foods. The thermodynamic instability of oil and water, and high susceptibility of unsaturated fatty acids to …
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Impact of ingredient interactions on the physico-chemical stability of milk protein-stabilised oil-in-water emulsions
Besides an oil phase and an aqueous phase, emulsions also contain an emulsifier (e.g. protein). In addition, most food emulsions contain other ingredients, which are intended to adjust the macroscopic appearance, rheology or gravitational stability. Thickeners are used to slow down creaming or …
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Effects of Xanthan/Locust Bean Gum Mixtures on the Physicochemical Properties and Oxidative Stability of Whey Protein Stabilized Oil-In-Water Emulsions
<p>Scientific evidence shows that dietary intake of the omega-3 polyunsaturated fatty acids is beneficial to human health. Fish oil is a rich source of omega-3 fatty acids. However, fish oil with high levels of omega-3 PUFA is very susceptible to oxidative deterioration during storage. The …
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Cavitation erosion of materials
This investigation was undertaken to find the optimum hydraulic fluids and materials for combating cavitation erosion in hydraulic mining machinery operating,on 5:95 oil-in-water emulsions, Controlled cavitation was generated in the laboratory in a vibratory cavitation apparatus employing the …
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Resistance-in-series modeling in high-shear rotary ultrafiltration
Large volumes of spent oil-in-water emulsions are produced in the metal working (MW) industry. In high-shear rotary ultrafiltration (HSR-UF), disk membranes are rotated at speeds up to 1,750 rpm to generate hydraulic turbulence, which scours the membrane surface. Thus, the pump is required only to …
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Evaporation of liquids from structured and non-structured mixtures
The work presented in this thesis describes the evaporation rates of a wide variety of samples obtained under a controlled gas flow using a gravimetric technique. Evaporation rates for pure liquids with vapour pressures ranging from 0.1 to 500 Torr, water contained in silica particles, …
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Fatores críticos na emulsificação por membranas : caracterização e avaliação do processo
The investigation of the critical factors involved in membrane emulsification (ME) using polymeric membranes was carried out. Two different techniques were applied (direct and premix ME with repetitive cycles) in order to obtain oil in water emulsions (O/W) using sunflower oil and lemon essential …
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Application of Soluble Whey Protein-Carboxymethylcellulose Complex in Emulsion and Acid-induced Gelation
Soluble complex between whey protein isolate (WPI) and carboxymethylcellulose (CMC) can be formed at pH above the pI of the protein. In the first study, the influence of CMC concentration and molecular weight (Mw = 270k, 750k, and 2,500kDa) on the stability and properties of WPI/CMC-stabilized …
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Particles at fluid interfaces : behaviour and derived materials
… of this thesis are to enhance the understanding of the particle behaviour at fluid interfaces using novel and stimuli responsive particles, and how their adsorption at these interfaces affect the emulsions, foams or other materials that they are stabilising. Materials stabilised solely by …
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Carbon Nanotubes for the Stabilization of Lipid Nanostructured Particles
… hydrophilic head-group and hydrophobic alkyl chain/s. Lipids are known to self-assemble into remarkable nanostructures in the aqueous medium. In order to enhance their applicability, these nanostructures are further stabilised into nanoparticles using various stabilisers; resultant are the …
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NMR-Studien an grenzflächenaktiven Verbindungen in kosmetisch relevanten Systemen
In this work surfactant systems of cosmetically interest are examined by static and dynamic NMR-methods in order to get more insight in stabilization mechanisms of emulsions used for cosmetic products. Cosmetic oil in water emulsions with a stearyl phosphate emulsifier were examined by means of …
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Colloidal Self-Assembly: Particle Synthesis, Functionalisation and Applications
Colloids, broadly defined as particles small enough to not sediment under gravitational force while dispersed in a continuous medium, are of great scientific and industrial importance. They are present in foods, cosmetics, paints and other materials, often in a jammed or a gelled state. This …
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Advances in membrane-based oil/water separation
Oil is a widespread pollutant from oil spills to industrial oily wastewater in the oil and gas, metalworking, textile and paper, food processing, cosmetics, and pharmaceutical industries. A wastewater of particular concern is produced water, an oily waste stream from hydrocarbon extraction …
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Conjugated polymers and designed interfaces : conformational analysis and applications
… can be altered by nearby environments. The intrapolymer conformation and interpolymer assemblies have a crucial impact on a variety of properties such as absorption, energy migration, and fluorescence. In this dissertation, the conformational changes and their effects on photophysics in …
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Unique Emulsions based on recombinant Hydrophobins
Hydrophobins are very interesting proteins of fungal origin. Beside their relatively small size of around 100 amino acids, they are well known to be the most surface active, natural proteins that have a strong tendency for self-assembly. Due to their versatile properties hydrophobins are present in …
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