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    Antioxidant properties, chemical composition and nutritional value of Terfezia boudieri (Chatin) from Turkey
    (Sage Publications Ltd, 2012) Dundar, A.; Yesil, O. Faruk; Acay, H.; Okumus, V.; Ozdemir, S.; Yildiz, A.
    Our objectives were to investigate the chemical composition, nutritive value and antioxidant activity potentials of Terfezia boudieri Chatin collected from different areas from Southeast of Turkey. The amounts of energy, protein, fat, carbohydrate, crude fibre, moisture and ash were 34.00-65.00 (kcal/100 g), 1.40-2.73, 0.86-1.71, 4.84-11.60, 80.86-90.33 (g/100 g, f.w.) and 1.02-1.98 g/100 g dry mass, respectively. Fatty acids and amino acids analyses revealed that linoleic acid and glutamic acid were, respectively the most abundant. Among the essential amino acids leucine was the highest amount and this was followed by threonine. Magnesium was the most abundant element with a concentration value of 182.30 mg/100 g dry mass. T. boudieri exhibited excellent antioxidant activity when compared with standard compounds. In total antioxidant and chelating effect on ferrous ions activity T. boudieri showed the highest activity against the standards. Additionally, at all studied tests antioxidant activity of the mushroom increased with increasing concentration. The total phenolic content of T. boudieri was found as 8.45 mg/g.
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    Öğe
    Heavy Metal Biosorption Characteristics of the Submerged Aquatic Plant (Nasturtium officinale)
    (Asian Journal Of Chemistry, 2010) Okumus, V.; Basaran, D.; Onay, A.
    In the present investigation an aquatic plant, Nasturtium officinale was examined for its biosorption ability of heavy metal ions. The results obtained from biosorption experiments were used to understand the driving forces that govern the interaction between metal ions and biosorbent. The experimental biosorption data were fitted to the Scatchard plot, Langmiur and Freundlich isotherms. According to the parameters of the Langmiur isotherm, the maximum biosorption capacities of Cd2+ and Co2+ were 0.56 and 0.49 mg/g, respectively. In view of Freundlich isotherms. the maximum biosorption capacities of Cd2+ and Co2+ were 2.23 mg/g for both of metal ions.