Influence of the welan gum biopolymer concentration on the rheological properties, droplet size distribution and physical stability of thyme oil/W emulsions

Martín-Piñero, M. José; Garcı́a, M. C.; Muñoz, José; Alfaro-Rodríguez, María-Carmen

doi:10.1016/j.ijbiomac.2019.04.137

Cited by 26 publications

(10 citation statements)

References 20 publications

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“…As a result of greater oil breakdown caused by the formation of a stable oil-in-water emulsion by microbes, the nutrients available to the bacteria are increased. In natural systems, this phenomenon is produced by using the autochthonous surfactant bio-population, which results in the development of stable emulsions [148]. Additionally, microbes have the capacity to attach to and create complexes with the contaminants, which makes the process of degrading pollutants more laborious and challenging.…”

Section: Bioremediationmentioning

confidence: 99%

A review on the physicochemical and biological applications of biosurfactants in biotechnology and pharmaceuticals

Abbot

Paliwal

Sharma

et al. 2022

Heliyon

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Section: Bioremediationmentioning

confidence: 99%

A review on the physicochemical and biological applications of biosurfactants in biotechnology and pharmaceuticals

Abbot

Paliwal

Sharma

et al. 2022

Heliyon

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“…Interestingly, droplet size distribution can be quantified using different parameters, e.g., Sauter diameter, volumetric diameter, span, or uniformity. There are several studies that relate these parameters with physical stability and rheology [ 1 , 2 , 3 ]. Normally, smaller medium droplet sizes and narrower droplet size distributions provokes higher viscosities and enhanced physical stability.…”

Section: Introductionmentioning

confidence: 99%

Relation between Droplet Size Distributions and Physical Stability for Zein Microfluidized Emulsions

et al. 2022

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Zein, a subproduct of the food industry and a protein, possesses limited applications due to its high hydrophobic character. The objective of this research was to investigate the influence of homogenization pressure and cycles on the volumetric mean diameter (D4,3), span values, and Turbiscan Stability Index (TSI) using the response surface methodology for microfluidized emulsions containing zein as a unique stabilizer. Results showed that homogenization pressure seems to be the most influential parameter to obtain enhanced physical stability and droplet size distributions, with the optimum being 20,000 psi. Interestingly, the optimum number of cycles for volumetric diameter, span value, and TSI is not the same. Although a decrease of D4,3 with number of cycles is observed (optimum three cycles), this provokes an increase of span values (optimum one cycle) due to the recoalescence effect. Since physical stability is influenced by D4,3 and span, the minimum for TSI is observed at the middle level of the cycles (2 cycles). This work highlights that not only volumetric diameter, but also span value must be taken into consideration in order to obtain stable zein emulsions. In addition, this study wants to extend the limited knowledge about zein-based emulsions processed with a Microfluidizer device.

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“…These characteristics make its use in a dispersed system very interesting since it allows the delay to destabilization mechanisms such as creaming, flocculation, or coalescence. This is due to the presence of a biopolymer in the continuous phase provoking an increase in its viscosity, which reduces droplet mobility 7 . Furthermore, several studies reveal that pectin could act as an emulsifier as a consequence of its hydrophobic domains in its chemical structure that allow its absorption at the oil–water interface 8,9 …”

Section: Introductionmentioning

confidence: 99%

“…This is due to the presence of a biopolymer in the continuous phase provoking an increase in its viscosity, which reduces droplet mobility. 7 Furthermore, several studies reveal that pectin could act as an emulsifier as a consequence of its hydrophobic domains in its chemical structure that allow its absorption at the oil-water interface. 8,9 All the pectin properties mentioned support its use in emulsion formulation because they contribute to its structural stability and additionally impart desirable texture to the final product.…”

Section: Introductionmentioning

confidence: 99%

Elaboration and characterization of nanoemulsion with orange essential oil and pectin

et al. 2021

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BACKGROUND: Nanoemulsions formulated with citric essential oils are currently of interest because of their physical and chemical properties and multiple applications in areas such as the food industry or agrochemicals. These are thermodynamically unstable and have almost Newtonian flow behaviour, but a suitable formulation allows systems to be obtained with good physical stability and rheological properties. The addition of pectin makes this possible. In this work, food nanoemulsions formulated with pectin, orange essential oil (5 wt%), and Tween 80 were obtained by microfluidization. First, the effect of Tween 80 concentration from 1 to 5 wt% on emulsions without pectin was evaluated. Then, pectin was added to the most stable nanoemulsion obtained and two variables were studied: the pectin solution concentration (from 2 to 6 wt%) and the pectin/emulsion ratio (1:1 or 2:1) at a fixed pectin concentration. RESULTS: Rheological, laser diffraction, and multiple light scattering techniques were employed to determine the content of Tween 80 that results in the most stable nanoemulsion without pectin, which was 3 wt%. In addition, these techniques were used to determine the structure and physical stability of the nanoemulsions containing orange essential oil and pectin. The results obtained showed that the emulsions containing 2 wt% pectin were destabilized before 24 h. Furthermore, the emulsion with 6 wt% pectin and a 2:1 pectin/ emulsion ratio showed the highest viscosity and the lowest mean diameters, and therefore the greatest stability.CONCLUSION: This work extends the knowledge of formulation of nanoemulsions and using essential oils.

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Influence of the welan gum biopolymer concentration on the rheological properties, droplet size distribution and physical stability of thyme oil/W emulsions

Cited by 26 publications

References 20 publications

A review on the physicochemical and biological applications of biosurfactants in biotechnology and pharmaceuticals

A review on the physicochemical and biological applications of biosurfactants in biotechnology and pharmaceuticals

Relation between Droplet Size Distributions and Physical Stability for Zein Microfluidized Emulsions

Elaboration and characterization of nanoemulsion with orange essential oil and pectin

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