The oxidative stability of microalgae oil (MO) and its enzymatic glycerolysis product (GP) have been determined by using the accelerated oxidation methods differential scanning calorimetry (DSC) Rancimat at temperatures in range 50–90 °C. Kinetic analyses MO GP provide Arrhenius activation energy enthalpy entropy, temperature coefficients, Q 10 index 20 °C (OSI ), based on secondary tertiary pr...

This study was carried out to study some quality indices (acid value, peroxide value and UV absorption K232nm, K270nm and ∆K) of virgin olive oil of three varieties (Coratina, Koronakii and Picual) at two stages of ripening. Also, organoleptic tests, phenolic content, αtocopherol and oxidative stability measured by Rancimat method at 100 ̊C were determined. Fatty acid composition and volatile co...

recently, subcritical water extraction (swe) has been well known as a green technology for extraction of bioactive compounds from plants. in this study, subcritical water extraction, ultrasound assisted extraction (uae) and shaker solvent extraction (sse) were compared for extraction of phenolic compounds from fig (ficuscarica) pulp and skin. antioxidant activity of the extracts was evaluated u...

The quality, composition and oxidative stability of argan oils from unroasted kernels were evaluated before and after filtering the cold-pressed oils. Filtering leads to significant changes in the content of free fatty acids, the peroxide value, the total content of phospholipids and the oxidative stability measured by the Rancimat test at 110°C. The high level of tocopherols, fatty acid and st...

A luteolin and phospholipid complex was prepared to improve the lipophilic properties of luteolin. The physicochemical properties of the complex were analyzed by ultraviolet-visible spectrometry (UV), infrared spectrometry (IR), X-ray diffractometry (XRD) and differential scanning calorimetry (DSC). The results showed that luteolin and phospholipid in the complex were joined by non-covalent-bon...

Co-extraction of pomegranate seed oil (PSO) with green tea leaves (GTL) (0 [control sample], 2.5, 5, 7.5, and 10% w/w) was conducted by cold-press to evaluate the extracted quality during storage. The extraction yield similar control sample up 5% w/w GTL. Total phenol chlorophyll content were increased in oils increasing level acid peroxide values storage lowest achieved for PSO Rancimat analys...

The main objective of this study was the screening of some selected aromatic plants very popular in Greece, with respect to their total phenolic content, antioxidant capacity, reducing activity, and oxidative stability. All plants were extracted with the conventional method, reflux with methanol. The essential oils of the plants were also analyzed for their antioxidant properties. The total phe...