The present study was undertaken to evaluate and compare the potential of antioxidant activities of olive leaf extracts(OLEs) with other natural or synthetic antioxidants. So, the aim of this study was to assess the effectiveness of methanolic-,ethanolic-,and water-olive leave extracts (OLEs) and compare it with other antioxidants such as green tea extract , tert-butylhydroxyquinone (TBHQ) , citric acid on the oxidative stability of virgin canola oil during storage at an oven at 63±1°C temperature for 0,5,10,15,20 days. To follow the relative of oxidative deterioration of canola oil , oils were analyzed periodically for their peroxide value (PV) , iodine value (IV) , acid value (AV) and Thiobarbituric acid (T.B.A.). Analysis of heated canola oils demonstrated significant increases in PV and AV and T.B.A. However , IV of the oils were markedly decreased. Results also showed that olive leaf extracts (i.e.,methanolic-,ethanolic-,and water-olive leave extracts) secured protective effect against oxidation of canola oil and can serve as substitutes for synthetic antioxidants .

The gross chemical composition, protein content and amino acid composition of mango stone kernels of four Egyptian varieties (Ewsi, Hendi, Fonso and Timour) were investigated. Carbohydrates are the main components of the seed. The protein content varies between 5.0 and 7.2% and the ether extract ranged from 10.8% to 13.6%. High glutamic acid, aspartic acid and leucine content and low concentration of sulfur-containing amino acids are characteristic for the proteins of mango kernels. Lysine level is also low, the concentration of other essential amino acids is acceptable. Sulfur-containing amino acids are the first limiting ones followed by lysine and threonine.

Electromagnetic fields (EMFs) are common in our everyday lives. They have many origins and severe effects on individuals and environments where they inflict a great deal of health and psychological harm. The current study investigated the impact of high voltage (H.V.) EMF 5.4 k / v for 2, 4 h per day with a frequency equal to 50 Hz on body weight(b.wt), blood indices, and certain liver enzymes of albino rats after 25 days of exposure to the electromagnetic field. This work focuses on the therapeutic action of methanol extract of Rosmarinus officinalis (R. officinalis) leaves at a dose (5 mg/kg b. wt) against harmful EMF-induced effects. The findings showed that electromagnetic field exposure induced a substantial decrease in red blood cells (RBC), haemoglobin concentration (Hb), and catalase activity (CAT). Although white blood cells (WBCs), aspartate aminotransferase (AST), alanine aminotransferase (ALT), Total Bilirubin, Urea, Creatinine, Uric Acid, and Malondialdehyde (MDA) levels have increased significantly under EMF treatment. Treatment with R.officinalis showed attenuation in these parameters that were induced in rats exposed to H.V. These findings were followed by the histopathological analysis of the liver in the observations. Finally, we conclude that R.officinalis leaves extract offered substantial protection against H.V induced liver damage and can be applied in drug production.

The present study was undertaken to evaluate the potential of antioxidant activity of olive leaf extracts (OLEs) and compared with other natural or synthetic antioxidants. Different extracts in term of antioxidant properties were studied. Three extracts of olive leaf were obtained by using ethanol , methanol and water .So, the aim of this study was to assess the effectiveness of such extracts and compared it with other antioxidants such as green tea extract , TBHQ , citric acid on the oxidative stability of sunflower oil during storage at an oven at 63±1°C for 0, 5, 10, 15, 20 days. To follow the relative of oxidative deterioration of sunflower oil , as well as deteriming the antioxidative activity of various samples. Oils were analyzed periodically for their peroxide value (PV) , iodine value (IV) , acid value (AV) and thiobarbituric acid (T.B.A.). Analysis of heated sunflower oils demonstrated significant increases in PV and AV and T.B.A. However , IV of the oils were markedly decreased. On the other hand , ethanol extract exhibited the highest antiradical activity among solvents. Results also showed that the three extracts of olive leaf (i.e. methanolic-, ethanolic-and water-olive leaf extracts) secured protective effect against oxidation of sunflower oil and can serve as substitutes for synthetic antioxidants .

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