Pattern Formation in Microemulsions Affected by Electric Fields

Dähmlow, Patricia; Müller, Stefan

doi:10.1007/978-3-319-64334-2_10

Cited by 2 publications

(1 citation statement)

References 22 publications

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“…Moreover, the increment in the conductivity has been observed with the increase of water phase concentration. According to the scientific reports, the percolation threshold may occur when swollen micelles start self-assembling, as happened with sample C4 (Figure ). The conductivity increased significantly when the concentration of water was higher than 50–60 wt % which is attributed to the transition of the bicontinuous structure of o/w.…”

Section: Results and Discussionmentioning

confidence: 83%

Citrus sinensis Essential Oil-Based Microemulsions: Green Synthesis, Characterization, and Antibacterial and Larvicide Activities

Souza

Santos

Barbosa

et al. 2021

ACS Food Sci. Technol.

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The aim of this study was the development and characterization of a new microemulsion composed of sweet orange (Citrus sinensis L.) essential oils (EOCs) and evaluate its antibacterial and larvicide profiles. The optimal combination of EOCs, surfactant (Kolliphor EL), and water was achieved using a ternary phase diagram. EOCs were obtained from orange peel by steam-distillation and analyzed by gas chromatograph–mass spectrometer (GC-MS). A total of 25 compounds were identified, among which 90 wt % was d-limonene. In order to determine antimicrobial activity of the formulation, minimum inhibitory concentration (MIC) assay was done. d-Limonene, limonene 1,2-epoxide, and β-mircene showed a high antibacterial activity. Cell viability studies were performed in L929 murine fibroblast as a cellular line, using the MTT assay. A cell viability of 118% for EOCs and 117.7% for microemulsion after 72 h was recorded indicating no relevant cytotoxic effect. In vivo studies, based on a wax moth, Galleria mellonella (G. mellonella), larvae as a model system showed 100% of larvae mortality under the influence of the microemulsion with EOCs, while a second efficiency rating of 45% for larvae mortality was reached for pure EOCs. These tests confirm a strong larvicide activity for the essential oil, characterized by the highest concentration of limonene as the larvicide agent. The loading of EOCs into microemulsions offered an improved approach for the delivery of this oil which retained its bioactivity, as shown in vitro and in vivo.

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Section: Results and Discussionmentioning

confidence: 83%

Citrus sinensis Essential Oil-Based Microemulsions: Green Synthesis, Characterization, and Antibacterial and Larvicide Activities

Souza

Santos

Barbosa

et al. 2021

ACS Food Sci. Technol.

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Conducting Medium Electrical Conductivity at High Current Density

Timchenko

Zadorozhny

2021

HoBMSTU.SNS

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The experimental research example of electrical characteristics of structurally heterogeneous thinlayer conductors (nickel, copper) at high current density (108--109 А/m2) is shown. This current density in conditions of the samples intensive cooling is sufficient for the process of irreversible, nonthermally activated deformation. The experiment results show that the conducting medium at high current density has essential nonlinearities expressed in nonlinear dependence of the samples electrical resistance from current density. With repeated current treatments of the samples the conductors' electrical resistivity decreases. The number of defects removed from the volume of material as a result of nickel foil treatment by electric current is estimated. It is shown that under conditions of highdensity direct electric current flow in microvolumes of homogeneous and inhomogeneous conducting media a volume charge can appear. The appearance of the volume charge in a conducting medium can be caused by interaction forces during the motion of electrons and ions. Due to the interaction forces between ions and electrons of basic material and impurities, additional local ionization occurs which is realized in nano-volumes of a conductor. In the case of heterogeneous medium, the volume charge depends on the nature of the specific conductivity distribution. In a homogeneous conductor the volume charge is proportional to the square of the current density in the sample

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Pattern Formation in Microemulsions Affected by Electric Fields

Cited by 2 publications

References 22 publications

Citrus sinensis Essential Oil-Based Microemulsions: Green Synthesis, Characterization, and Antibacterial and Larvicide Activities

Citrus sinensis Essential Oil-Based Microemulsions: Green Synthesis, Characterization, and Antibacterial and Larvicide Activities

Conducting Medium Electrical Conductivity at High Current Density

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