Coalescence stability of emulsions containing globular milk proteins

Tcholakova, Slavka; Denkov, Nikolai D.; Ivanov, Ivan B.; Campbell, Bruce

doi:10.1016/j.cis.2006.05.021

Cited by 302 publications

(187 citation statements)

References 125 publications

(334 reference statements)

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“…It is well known that the droplet size of protein-stabilized emulsion can be controlled by changing the oil and/or emulsifier content 16,17 , and that the composition of a system may be classifi ed into so-called surfactant-rich and surfactantpoor regimes. In the former regime, droplet size is independent of emulsifier or oil content, and the factors affecting the drop size are the interfacial tension and the hydrodynamic conditions during emulsification 2,4 . In the latter regime, on the other hand, droplet size rapidly decreases with increased emulsifi er content.…”

Section: Oil Droplet Size Of Emulsionsmentioning

confidence: 99%

“…The P CR is a measure of the mechanical strength of the protein film against coalescence between oil drops in emulsion systems. Theoretical details on the P CR are written in the papers of Tcholakova et al 4,5 . Figure 7 shows a typical graph for the time course of phase separation of BSA-stabilized emulsion with 35 v/ v oil content.…”

Section: Oiling-off Of Emulsion By Centrifugal Accelerationmentioning

confidence: 99%

“…This apparatus was useful for the present purpose because it could directly measure the light transmission profi le along the entire sample length during centrifugation, and made it possible to verify the equilibration of the phase-separate process in the emulsions. From the estimated volume of released oil-and cream-phase at the mechanical equilibrium state under a given centrifugal acceleration, the critical osmotic pressure, P CR , a quantitative measure against coalescence between oil drops, could be evaluated 4,5,9,10 .…”

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The Coalescence Stability of Protein-stabilized Emulsions Estimated by Analytical Photo-centrifugation

2011

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Section: Oil Droplet Size Of Emulsionsmentioning

confidence: 99%

Section: Oiling-off Of Emulsion By Centrifugal Accelerationmentioning

confidence: 99%

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The Coalescence Stability of Protein-stabilized Emulsions Estimated by Analytical Photo-centrifugation

2011

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“…These studies use extreme and different conditions to accelerate the potential reactions between components and demonstrate the most common instability processes of formulations (phase separation, flocculation and creaming) (Tcholakova et al, 2006). The conditions of these studies are not intended to estimate product shelf-life, but to provide formulation screening .…”

Section: Preliminary Stability Testsmentioning

confidence: 99%

Use of Opuntia ficus-indica (L.) Mill extracts from Brazilian Caatinga as an alternative of natural moisturizer in cosmetic formulations

Damasceno¹,

Silva²,

Fernandes³

et al. 2016

Braz. J. Pharm. Sci.

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The aim of this work was the obtainment of Opuntia fícus-indica (L.) Mill extract for the development of cosmetic formulations and in vivo evaluation of its moisturizing effects. The formulations were tested for preliminary and accelerated stability. Organoleptic characteristics, pH values and rheological behavior were assessed. The evaluation of moisturizing efficacy of the emulsions formulated with 3.0% of Polyacrylamide (and) C13-14 Isoparaffin (and) Laureth-7 containing 1.0 and 3.0% of O. ficus-indica hydroglycolic extract (EHG001) was performed using the capacitance method (Corneometer®) and the transepidermal water loss -TEWL evaluation (Tewameter®). The emulsions formulated were stable, exhibiting pseudoplastic and thixotropic behavior. The results of evaluation of moisturizing efficacy showed increased skin hydration after five hours by mainly increasing the skin barrier effect. The formulations containing 1.0 and 3.0% of EHG001 enhanced the skin barrier effect by reducing TEWL up to four hours after application. The results observed suggest that O. ficus-indica hydroglycolic extract may act through a humectant and occlusion mechanism.Uniterms Opuntia fícus indica/emulsion stability. Opuntia fícus indica/cosmetic efficacy. Skin/cosmetics/ use/efficacy

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“…These studies use extreme and different conditions to accelerate the potential reactions between components and demonstrate the most common instability processes of emulsions (phase separation, flocculation and creaming) (Tcholakova et al, 2006). The conditions of these studies are not intended to estimate product shelf-life, but to provide the formulation screening .…”

Section: Preliminary Stability Testsmentioning

confidence: 99%

Development of O/W emulsions containing Euterpe oleracea extract and evaluation of photoprotective efficacy

Daher

Fontes

Rodrigues

et al. 2014

Braz. J. Pharm. Sci.

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Euterpe oleracea Mart. is a palm tree popularly known as açai, which is primarily found in northern Brazil. The açai's fruits contain anthocyanins, a class of polyphenols to which antioxidant properties have been attributed. The aim of this work was to develop O/W sunscreens emulsions containing açai glycolic extract (AGE) and to evaluate both their physical stability and photoprotective efficacy. Emulsions containing AGE and sunscreens were formulated using different types and concentrations of polymeric surfactant (acrylates/C 10-30 alkyl acrylate crosspolymer and sodium polyacrylate). The influence of two rheology modifiers (polyacrylamide (and) C13-14/isoparaffin (and) Laureth-7 and Carbomer) on the stability was also investigated. Physical stability was evaluated by preliminary and accelerated studies. Emulsions with 1.0% sodium polyacrylate were stable and exhibited non-newtonian pseudoplastic behavior and thixotropy. Photoprotective efficacy was evaluated by in vivo Sun Protection Factor (SPF) and determination of Protection Factor of UVA (PF-UVA). When AGE was added to the sunscreen emulsion, no significant increase in the in vivo SPF value was observed. The emulsion containing AGE showed PF-UVA = 14.97, 1.69 of the SPF/PF-UVA ratio and a critical wavelength value of 378 nm, and may therefore be considered a sunscreen with UVA and UVB protection. Euterpe oleracea Mart. é uma palmeira popularmente conhecida como açaí, encontrada no norte do Brasil. O fruto do açaí apresenta em sua composição antocianinas, uma classe de polifenóis à qual é atribuída propriedade antioxidante. Os objetivos desse trabalho foram desenvolver emulsões fotoprotetoras O/A contendo extrato glicólico de açaí (AGE), avaliar a estabilidade física e avaliar a eficácia fotoprotetora. Emulsões contendo AGE e filtros solares foram formuladas utilizando diferentes tipos e concentrações de tensoativo polimérico (acrilates/C 10-30 alquil acrilato polímero cruzado e polilacrilato sódico). A influência de dois modificadores reológicos (poliacrilamida (e) C13-14/isoparafina (e) Laureth-7 e Carbomer) na estabilidade foi avaliada. A estabilidade física das emulsões foi avaliada por meio de estudos de estabilidade preliminar e acelerada. Emulsões com 1,0% poliacrilato sódico foram estáveis, exibiram comportamento não-newtoniano pseudoplástico e tixotrópico. A eficácia fotoprotetora foi avaliada pelo teste in vivo de Fator de Proteção Solar (FPS) e pela determinação do Fator de Proteção UVA (FP-UVA). Quando adicionado o AGE na emulsão contendo filtros solares, não se observou aumento significativo no valor do FPS. A emulsão contendo o AGE apresentou FP-UVA=14,97, a razão FPS/ FP-UVA = 1,69 e o comprimento de onda crítico igual a 378 nm, podendo ser considerado um protetor solar com proteção UVA e UVB. Unitermos:Emulsão O/A/desenvolvimento. Euterpe oleracea/farmacognosia. Euterpe oleracea/extrato glicólico/eficácia fotoprotetora. Protetores Solares/desenvolvimento. Fator de Proteção Solar.

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Coalescence stability of emulsions containing globular milk proteins

Cited by 302 publications

References 125 publications

The Coalescence Stability of Protein-stabilized Emulsions Estimated by Analytical Photo-centrifugation

The Coalescence Stability of Protein-stabilized Emulsions Estimated by Analytical Photo-centrifugation

Use of Opuntia ficus-indica (L.) Mill extracts from Brazilian Caatinga as an alternative of natural moisturizer in cosmetic formulations

Development of O/W emulsions containing Euterpe oleracea extract and evaluation of photoprotective efficacy

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