scholarly journals Fluorescent liquid pyrene derivative-in-water microemulsions

2016 ◽  
Vol 52 (46) ◽  
pp. 7344-7347 ◽  
Author(s):  
M. J. Hollamby ◽  
A. E. Danks ◽  
Z. Schnepp ◽  
S. E. Rogers ◽  
S. R. Hart ◽  
...  
Keyword(s):  
Droplet Size ◽  
Fluorescence Emission ◽  
Oil In Water

Using a liquid pyrene derivative as the oil, stable oil-in-water microemuslions are prepared, with tunable fluorescence emission via droplet size.

scholarly journals Stabilization and Release of Palm Tocotrienol Emulsion Fabricated Using pH-Sensitive Calcium Carbonate

Foods ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 358
Author(s):  
Phui Yee Tan ◽  
Beng Ti Tey ◽  
Eng Seng Chan ◽  
Oi Ming Lai ◽  
Hon Weng Chang ◽  
...  
Keyword(s):  
Calcium Carbonate ◽  
Droplet Size ◽  
Entrapment Efficiency ◽  
Ph Sensitive ◽  
Emulsion System ◽  
Ph Responsive ◽  
Small Droplet ◽  
Homogenization Time ◽  
Oil In Water ◽  
Ph Range

Calcium carbonate (CaCO3) has been utilized as a pH-responsive component in various products. In this present work, palm tocotrienols-rich fraction (TRF) was successfully entrapped in a self-assembled oil-in-water (O/W) emulsion system by using CaCO3 as the stabilizer. The emulsion droplet size, viscosity and tocotrienols entrapment efficiency (EE) were strongly affected by varying the processing (homogenization speed and time) and formulation (CaCO3 and TRF concentrations) parameters. Our findings indicated that the combination of 5000 rpm homogenization speed, 15 min homogenization time, 0.75% CaCO3 concentration and 2% TRF concentration resulted in a high EE of tocotrienols (92.59–99.16%) and small droplet size (18.83 ± 1.36 µm). The resulting emulsion system readily released the entrapped tocotrienols across the pH range tested (pH 1–9); with relatively the highest release observed at pH 3. The current study presents a potential pH-sensitive emulsion system for the entrapment and delivery of palm tocotrienols.

scholarly journals Effect of Polydispersity in Oil-droplet Size on Lipid Oxidation in Oil-in-water Emulsions

2016 ◽  
Vol 17 (3) ◽  
pp. 91-94 ◽  
Author(s):  
Yayoi MIYAGAWA ◽  
Kohshi KIKUCHI ◽  
Hirokazu SHIGA ◽  
Shuji ADACHI
Keyword(s):  
Lipid Oxidation ◽  
Droplet Size ◽  
Oil Droplet ◽  
Oil In Water ◽  
Oil Droplet Size

Effects of droplet size on the interfacial concentrations of antioxidants in fish and olive oil-in-water emulsions and nanoemulsions and on their oxidative stability

2020 ◽  
Vol 562 ◽  
pp. 352-362 ◽  
Author(s):  
Marlene Costa ◽  
Josefa Freiría-Gándara ◽  
Sonia Losada-Barreiro ◽  
Fátima Paiva-Martins ◽  
Carlos Bravo-Díaz
Keyword(s):  
Oxidative Stability ◽  
Olive Oil ◽  
Droplet Size ◽  
Oil In Water

Influence of droplet size on the antioxidant efficacy of oil-in-water emulsions loaded with rosemary in raw fermented sausages

2017 ◽  
Vol 243 (8) ◽  
pp. 1415-1427 ◽  
Author(s):  
Martin E. Erdmann ◽  
Ralf Lautenschlaeger ◽  
Heinar Schmidt ◽  
Benjamin Zeeb ◽  
Monika Gibis ◽  
...  
Keyword(s):  
Droplet Size ◽  
Fermented Sausages ◽  
Oil In Water

Preparation of a synergistically stabilized oil-in-water paraffin Pickering emulsion for potential application in wood treatment

Holzforschung ◽  
2018 ◽  
Vol 72 (6) ◽  
pp. 489-497 ◽  
Author(s):  
Jun Jiang ◽  
Jinzhen Cao ◽  
Wang Wang ◽  
Haiying Shen
Keyword(s):  
Mechanical Properties ◽  
Cell Wall ◽  
Size Distribution ◽  
Droplet Size ◽  
Surface Hardness ◽  
Pickering Emulsion ◽  
Silica Particles ◽  
Morphological Properties ◽  
Pickering Emulsions ◽  
Oil In Water

AbstractPickering emulsions (emulsions stabilized by solid-state additives) are attractive as they have strong similarities with traditional surfactant-based emulsions. In this study, an oil-in-water (O/W) paraffin Pickering emulsion system with satisfying stability and small droplet size distribution was developed by hydrophilic silica particles and traditional surfactants as mixed emulsifiers. The droplet morphology and size distribution were observed by optical microscopy and a laser particle analyzer. The emulsion stability was improved and the droplet size was reduced after addition of a suitable amount of silica particles. The silica concentration of 1% showed the optimal effect among all the levels observed (0.1, 0.5, 1 and 2%). Wood was impregnated with the prepared emulsion, and the chemical and morphological properties of the product were investigated by Fourier-transform infrared (FTIR) spectroscopy and scanning electron microscopy (SEM) combined with energy-dispersed X-ray analysis (SEM-EDXA). Moreover, the hydrophobicity, thermal properties, surface hardness, axial compression strength (CS) and dynamic mechanical properties were tested. The silica was evenly distributed in the wood cell wall and thus there was a synergistic positive effect from the paraffin and silica in the cell wall leading to better hydrophobicity, improved surface hardness and mechanical properties including the thermal stability.

Effect of protein type, concentration and oil droplet size on the formation of repulsively jammed elastic nanoemulsion gels

Soft Matter ◽  
2019 ◽  
Vol 15 (47) ◽  
pp. 9762-9775 ◽  
Author(s):  
Aakash Patel ◽  
Athira Mohanan ◽  
Supratim Ghosh
Keyword(s):  
Whey Protein ◽  
Droplet Size ◽  
Sodium Caseinate ◽  
Oil Droplet ◽  
Critical Droplet ◽  
Oil In Water ◽  
Oil Droplet Size

Sodium caseinate (SC)-stabilized 40% oil-in-water nanoemulsions (NEs) could be transformed into elastic gels below a critical droplet size due to increase in ϕeff by a thicker steric barrier of SC, while whey protein (WPI)-stabilized NEs remained liquid due to thinner steric barrier of WPI.

scholarly journals Preparation and Characterization of Water-Based Nano-Perfumes

Nanomaterials ◽  
2018 ◽  
Vol 8 (12) ◽  
pp. 981 ◽  
Author(s):  
Małgorzata Miastkowska ◽  
Elwira Lasoń ◽  
Elżbieta Sikora ◽  
Katarzyna Wolińska-Kennard
Keyword(s):  
Droplet Size ◽  
Interfacial Area ◽  
High Energy ◽  
Protective Role ◽  
Food Industries ◽  
Low Viscosity ◽  
Oil In Water ◽  
Water Based

The application of nanoemulsions as a novel delivery system for lipophilic materials, such as essential oils, flavors, and fragrances is one of the growing technologies used in cosmetic, pharmaceutical, and food industries. Their characteristic properties, like small droplet size with high interfacial area, transparent or semi-transparent appearance, low viscosity, and high kinetic stability, make them a perfect vehicle for fragrances, in the perfume industry. They could be a great alternative to water-based perfumes, without alcohol, and solve problems related to the oxidation and low bioavailability of fragrances with other non-alcoholic vehicles of perfumes like pomades or gels. The aim of our study was to develop stable Oil-in-Water (O/W) nanoemulsions that are compatible with selected fragrance compositions, without ethanol, polyols, and ionic surfactants, and to study their physicochemical, microbiological, and dermatological properties. The nano-perfume systems were obtained with a low-energy (Phase Inversion Composition; PIC) and with a high-energy (ultrasound, US) method, taking into account the possibility of moving from the laboratory scale to an industrial scale. The optimized nano-perfume formulations, prepared with different methods, yielded the same physicochemical properties (stability, medium droplet size of the inner phase, polydispersity, viscosity, surface tension, pH, density). Stable systems were obtained with a fragrance composition concentration within 6–15% range. These formulations had a low viscosity and a pH suitable for the skin. Moreover, the obtained results confirmed the protective role of nanoemulsions. The peroxide number measurement (POV) showed that the tested fragrance compositions had a high chemical stability. The results of the microbiological tests confirmed that the obtained products were free of microbiological contamination and were appropriately preserved. The dermatological test results confirmed the safety of the developed preparations.

Influence of the Speed Mixing-on Viscosity and Droplet Size of Oil in Water Emulsions

2004 ◽  
Vol 22 (7-8) ◽  
pp. 1035-1043 ◽  
Author(s):  
María Vita Peralta-Martínez ◽  
Alejandro Arriola-Medellín ◽  
Emilio Manzanares-Papayanopoulos ◽  
Ramón Sánchez-Sánchez ◽  
Elvia María Palacios-Lozano
Keyword(s):  
Droplet Size ◽  
Oil In Water

Influence of droplet size on the efficacy of oil-in-water emulsions loaded with phenolic antimicrobials

2012 ◽  
Vol 3 (3) ◽  
pp. 290-301 ◽  
Author(s):  
Nino Terjung ◽  
Myriam Löffler ◽  
Monika Gibis ◽  
Jörg Hinrichs ◽  
Jochen Weiss
Keyword(s):  
Droplet Size ◽  
Oil In Water
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