In order to optimize the screw-press extraction conditions of oil from goldenberry (Physalis peruviana L.) seeds obtained nectar processing waste, a face centered design was applied. The extracted at different temperatures (60, 80, and 100°C) seed moisture contents (8, 10, 12%). Oil recovery (OR) increased residual in cake decreased significantly as content temperature were reduced; volatile ma...

The antioxidant properties of various fractions of a methanolic extract obtained from the aerial parts of Verbascum macrurum have been determined by monitoring their capacity to scavenge the stable free-radical DPPH. They were also evaluated as natural preservatives against oxidative rancidity using the accelerated Rancimat method. Their activities expressed as protection factor (PF(r)) indicat...

In this study was analyzed the effect of crop year and harvesting time on the fatty acid composition of cv. Picual virgin olive oil. The study was carried out during the fruit ripening period for three crop seasons. The mean fatty acid composition of Picual oils was determined. The oils contained palmitic acid (11.9%), oleic acid (79.3%), and linoleic acid (2.95%). The content of palmitic acid ...

in this study, antioxidant activity of kolkhung skin oil, baneh skin oil and seasame oil were compared. the ratio between polyunsaturated to saturated fatty acids (pufa/sfa) of kolkhung skin oil, bane skin oil and seasame seed oil were 0.52, 0.26 and 3.06, respectively. total phenolic contents of kolkhung skin oil, bane skin oil and seasame seed oil were 99.67, 645.73 and 81.72 mg/kg, respectiv...

The antioxidant and antimicrobial activity of methanol or dichloromethane extracts of O. dictamnus, produced from wild and organic cultivated specimens, were determined. The Rancimat and malondialdehyde (MDA) by HPLC methods were used to measure the antioxidant action, in comparison with that of the common commercial antioxidants butylated hydroxytoluene (BHT) and alpha-tocopherol. The extracts...

The oils of some unconventional oilseeds (hemp, radish, terebinth, stinging nettle, laurel) were obtained by a cold-press method in which the total oil content, fatty acids, tocopherol isomers, some metal contents (Ca, Mg, Fe, Cu), antioxidant activity and oxidative stability were determined. The total oil content was determined ranging between 30.68 and 43.12%, and the oil samples had large am...

The aim of this study was to determine the chemical composition (fatty acids, tocopherols, and sterols) evaluate oxidative stability Moroccan pomegranate ( Punica granatum L.) seed oil. oil content 22.63 g/100g dry weight. fatty acid showed a dominance conjugated linolenic acids (CLnAs) (86.96 g/100g). most dominant punicic (75.1 g/100g), followed by catalpic (6.7 g/100g) linoleic with amounts ...

Several fatty acid alkyl esters were subjected to accelerated methods of oxidation, including EN 14112 (Rancimat method) and pressurized differential scanning calorimetry (PDSC). Structural trends elucidated from both methods that improved oxidative stability included decreasing the number of double bonds, introduction of trans as opposed to cis unsaturation, location of unsaturation closer to ...

Bioactive compounds extracted from natural sources can benefit human health. The aim of this work was to determine total phenolic content and antioxidant activity in extracts of Euphorbia tirucalli L. followed by identification and quantification of the phenolic compounds, as well as their antibacterial activities. Antioxidant activities were determined by DPPH and ABTS(•+) assay. Identificatio...