Preparation and physicochemical stability of tomato seed oil microemulsions

Abstract

In this study, microemulsions were fabricated using tomato seed oil, water, Tween 80 and citric acid, and then the physicochemical characteristics and the influence of environmental stress were investigated. The physicochemical properties of the microemulsions were evaluated by transmission electron microscopy (TEM), mean particle diameter, polydispersity index (PDI) and conductivity. The phase diagrams of tomato seed oil/Tween 80/citric acid/water microemulsions were constructed under different pHs and ionic strengths. Storage stability of the systems was investigated at 4, 37 and 65°C, and changes in turbidity and lipid oxidation products were monitored. Nano‐size zeta potential analyzer results demonstrated that the mean particle diameter and polydispersity index of tomato seed oil microemulsions were 14 nm and 0.014. The transition from W/O to O/W could be detected from electrical conductivity and viscosity data with the increasing of water content. The results showed that the microemulsion areas decreased with increasing pH and NaCl concentrations. What is more, the study proved that tomato seed oil microemulsions exhibited a good storage stability. Practical Application In this study, the preparation of tomato seed oil microemulsion can not only make full use of the nutritional value of tomato seed oil, but also ensure the effective protection of the nutrients contained in it, and improve the problem of adding difficult. By using microemulsion as delivery carrier of tomato seed oil, the application of tomato seed oil in food, cosmetics and other fields could be enhanced. Therefore, the preparation of tomato seed oil microemulsion provides a theoretical basis for production practice.

Formulation of a Stable Oil-in-Water Microemulsion of Torreya grandis cv. Merrillii Aril Essential Oil and Its Application in Loquat Fruit Preservation

“…The microemulsion structure in this range was of an O/W type. Similar microstructural transitions have also been observed in microemulsions with different oils such as sacha inchi oil [21] and tomato seed oil [22].…”

Tomato seed extract promotes health of the gut microbiota and demonstrates a potential new way to valorize tomato waste

“…While this is advantageous to the consumer, tomato processing generates an estimated 5.4-9 million tons of waste a year, largely in the form of pomace containing the skins, some pulp, and tomato seeds, which is often discarded or used as an additive for animal feed [5,[7][8][9][10][11][12]. However, tomato seeds (5-10% of pomace) are highly nutritious, 32% protein, 27% fat, and 18% fiber, and rich in phytochemicals and phenolic acids, and other bioactive compounds [12][13][14]. This makes tomato seeds a potential source for extraction of bioactive compounds that can be used as high-value additives for application in the food, pharmaceutical, and cosmetic industries [9,15].…”