In this paper, we have studied the essential oils chemical composition of leaves seven Eucalyptus species developed in Tunisia. were picked from trees growing different arboretums Choucha and Mrifeg located Sedjnene, region Bizerte (Choucha: E. maideni, astrengens et cinerea; : leucoxylon), Korbous Nabeul, North East Tunisia with sub-humid bioclimate, (E. lehmani), Souiniet-Ain Drahem arboretum Jendouba sideroxylon, bicostata). Essential individually tested against a large panel...

BACKGROUND: Characterisation of the essential oils from O. glandulosum collected in three locations Tunisia, chemical composition and evaluation their antioxidant activities were carried out. RESULTS: The Origanum vulgare L. subsp. (Desf.) Ietswaart localities north Tunisia—Krib, Bargou Nefza—were obtained yields 2.5, 3.0 4.6% (v/w), respectively. analysed by GC GC/MS assayed for total phenolics content, Folin–Ciocalteu method, effectiveness, using 2,2-diphenyl-1-picrylhydrazil (DPPH)...

Fatty acid composition of peanut seed oil in four varieties cultivated Tunisia showed that linoleic (C18:2), oleic (C18:1) and palmitic (C16) acids account for more than 84% Chounfakhi Massriya 85% the total fatty Trabilsia Sinya respectively. Seed contents were significantly different (P ≤ 0.05) did not exceed 48%. The study phenolics revealed contained (2.1 mg GAE/g DW), followed by cultivars (1.35 DW each); presented lowest phenolic content with 1 DW. Considerable antiradical ability was...

The chemical analysis of flesh and seed date palm fruit (Kentichi) was evaluated. Carbohydrates were the predominant component in all studied cultivars (~78.69-83.46 g/100g dry matter), followed by moisture content (~9.23-11.17%), along with moderate amount fat (~0.56-7.10 protein (~2.16-2.80 ash (~1.18-1.64 g/100 g matter). Some antioxidants (Ascorbic acid, total phenolic, flavonoid, chlorophyll carotenoids) found different values both seed. physicochemical properties antioxidant activity...

The Opuntia ficus indica (L.) (OFI) is used as a nutritional and pharmaceutical agent in various dietary value added products. This study underlines the possible use of native prickly pear cladode powder functional ingredient for health-promoting food production. To summarise, chemical characterization polyphenols, minerals soluble fibre was performed; furthermore, antioxidant activity bioaccessibility polyphenols were assessed. Eleven compounds between phenolic acids flavonoids identified,...

The chemical composition (total oil content, fatty acids, triacylglycerols (TAGs) and polar compounds) of six walnuts (Juglans regia L.) cultivars (Lauzeronne, Franquette, Hartley, Local pt, gd Parisienne) collected from Mateur (north Tunisia) was evaluated. major acids found in the walnut oils are linoleic acid (60.42–65.77%), oleic (13.21–19.94%) linolenic (7.61–13%). TAG species were mainly composed trilinolein (LLL), dilinoleoyl-linolenoyl-glycerol, dilinoleoyl-oleoyl-glycerol...

The aim of this study was to analyze the effects heating on some quality characteristics and antioxidant activity flaxseed hull oil. Polyunsaturated fatty acids (PUFA) Cox value decreased during heating. Heating process led considerable increase in saponification (SV), peroxide (PV), p-anisidine (p-AnV), oxidative (OV) specific extinction at 232 270 nm. There a significant decrease oil stability (1.4-1.0 h). Fuel properties were also changed after treatment. caused loss total phenolic acids,...

Abstract Coffee grounds are the most commonly generated daily waste in world, raising numerous questions regarding their proper management and environmental impact. The present study focuses on physical chemical characterization of oil extracted from spent coffee (SCG), with aim valorizing this by‐product as a potential source for production. results obtained analysis SCG were also compared to those some edible oils (soybean, corn, sunflower oils) cosmetic (lentisc, sweet almond, castor...

HPLC employing a thermostatted Lichrospher 100 diol column was used to separate mixtures of glycerophospholipids rapeseed, olive, almond, and sunflower oils. Elution performed with binary gradient two mixed solvents A: hexane – isopropanol acetic acid triethylamine (82:17:1.0:0.08 v/v/v/v) B: water (85:14:1.0:0.08 v/v/v/v). The LC effluent directly introduced into the mass spectrometer through an electrospray capillary. Information about fatty composition each glycerophos pho lipid class...

The essential oils (EO) extracted by hydrodistillation from the leaves of walnut cultivated in region Mateur (north Tunisia) have shown that yield ranging 0.033% to 0.075%. analysis GC-FID and GC-MS identified twenty-nine compounds representing 84.25% total oil. major constituents were Caryophyllene oxide (16.9 27.4%) followed β–Caryophyllene (4.0 22.5%), Germacrene (1.2 9.4%) β- Pinene (2.8 9.5%). Juglans regia L.' rich Sesquiterpene hydrocarbon (13.9 39.6%), Oxygenated sesquiterpenes...

Abstract The kernel oil content, FA and TAG composition, moisture weight as well fruit of three almond cultivars (Achaak, Mazetto, Perlees) were monitored during the maturation kernels. Lipid fractions all samples extracted using a mixture chloroform methanol. FAMF contained in these analyzed by GC HPLC, respectively. ratio to appears be good indicator development. total lipid content developing kernels exhibited sigmoidal pattern with time, similar seeds other higher plants; cultivar Achaak...

Abstract The phenolic fraction of flaxseed oil was quantified during the development three varieties (H52, O116 and P129). Seed samples were collected at regular intervals from 7 to 56 days after flowering (DAF). During oilseed processing, less polar compounds are co‐extracted with oil. methanolic extracts obtained by solid phase extraction. Separation conducted high‐performance liquid chromatography‐mass spectrometry. main detected maturation were: diphyllin, pinoresinol, matairesinol,...

Abstract Among oil compounds, fatty acids, tocopherols and xanthophylls (lutein zeaxanthin) are of special interest due to their nutritional properties. The identification quantification these compounds in pecan nuts ( Carya illinoinensis ) could therefore be very useful produce functional foods rich this type. This paper reports studies on accumulation the effect ripening content high value‐added compounds. total lipid increased during ripening. Saturated polyunsaturated acids decreased...

Changes in the chemical composition and antioxidant activity of flaxseed hull during maturation were investigated. P129 variety was studied at four stages (St1, St2, St3, St4). Significant variation proximate oil characteristics observed. A significant increase carbohydrates content observed development. The main methyl esters linolenic acid (48.95 - 51.52 %), oleic (20.27-23.41%) linoleic (15.62-17.70%). highest polyunsaturated fatty acids (PUFA) found to be 67.14 % first stage maturity...