Yazar "Küçükbay F.Z." seçeneğine göre listele

Listeleniyor 1 - 3 / 3
  • Küçük Resim Yok
    Öğe
    Determination of Some Essential Elements and Composition of the Essential Oils of Achillea grandifolia Friv. (Asteraceae) from Different Localities
    (Taylor and Francis Ltd., 2012) Küçükbay F.Z.; Çetin H.
    The chemical composition essential oils of Achillea grandifolia natively grown from different localities in Turkey and their total contents of major, minor and trace elements (Al, Mn, Zn, B, Cu, Fe, Co, Se, Cd, Pb) were studied. Piperitone (34.0 %), carvacrol (7.0 %) and p-cymene, (5.0 %) were the main components in the oil of Achillea grandifolia collected from Izmir. The oil of Achillea grandifolia collected from Aydin contained 1,8-cineole (32.0 %), piperitone (18.7 %), and p-cymene, (10.0 %) as main constituents. The determination of mineral and trace elements in Achillea grandifolia samples leaves was carried out by flame and graphite furnace atomic absorption spectrometry. The accuracy of method was ensured by using standard reference material (NIST-SRM 1515 Apple leaves). Results presented here clearly show that the examined herbal remedies play a meaningful role in human nutrition as micro-nutrients sources. Their recommended daily dose consumption is not harmful. © 2012, Copyright Har Krishan Bhalla & Sons.
  • Küçük Resim Yok
    Öğe
    Essential oil composition of elettaria cardamomum maton
    (2013) Kuyumcu Savan E.; Küçükbay F.Z.
    Cardamom (Elettaria cardamomum Maton) is one of the most commonly used spices and is known as "the queen of spices". Cardamom of the Zingiberaceae family is one of the world's very ancient and expensive spices. The aromatic seeds of Elettaria cardamomum Maton are used in treatment of various diseases; from asthma to cardiac disorders besides using spices. Hydrodistilled essential oil of Cardamom which obtained using a Clevenger-type apparatus, were analysed by GC and GC-MS. Relative percentage amounts of the separated compounds were calculated from FID chromatograms. n-Alkanes were used as reference points in the calculation of relative retention indices (RRI). Sixty seven compounds were identified, representing 96.9% of the oil. The major components were found to be 1,8-cineole (25.6%), linalool (6.3%), a-terpinyl acetate (40.7%).
  • Küçük Resim Yok
    Öğe
    In vitro antioxidant activities of methanol extracts of three achillea species from Turkey
    (Turkish Chemical Society, 2021) Tekin Z.; Küçükbay F.Z.; Dikme A.
    In this study, total phenolics and flavonoid compounds of methanolic extract concentrations of three medicinal plant, Asteraceae (Compositae) L. genus that are grown in Turkey and belong to the genus Achillea, were determined with the goal of measuring their antioxidant activities. Antioxidant capacity was measured by widely used iron reducing power, DPPH radical scavenging activity and metal chelating capacity. The antioxidant activities of the achillea extracts used in the study were compared with the standard antioxidants (BHA, BHT and ?-tocopherol), which were frequently used as antioxidant food additives. According to the free radical scavenging activity antioxidant results, all the extracts exhibited higher DPPH radical scavenging activity than the standards used. The extract from A.boissieri showed remarkable 2,2-diphenyl-1-picrylhydrazyl free radical scavenging activity (68.51% at 37.5 ?g/mL) comparable with synthetic antioxidants. The ferric reducing antioxidant power was found to be moderate in methanolic extract of Achillea species, whereas the chelating capacity of the extracts were found to be lower as compared to the standards. In addition, total phenolic, flavonoid and flavonol content of all extracts were measured spectrophotometrically and the results were expressed as "gallic acid equivalent" or "quercetin equivalent". The total phenolic content was expressed as equivalents of gallic acid and the results were observed to range from 11.86 to 23.63 mg/g dry extract weight. The total flavonoid concentrations of Achillea extracts were expressed as quercetin equivalent. Flavonoid content ranged from 15.05 to 29.70 mg/g. Total flavonol concentrations of the extracts were determined to be between 5.92 and 7.20 mg/g in terms of quercetin equivalent. This study showed that Achillea L. species, which has been used for treatment in Anatolia for years, can be used as a potential natural antioxidant source. © 2021, Turkish Chemical Society. All rights reserved.