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    Antimicrobial Activity of Turkish Citrus Leaf Oils and Compositions of Turkish Orange and Grapefruit Leaf Oils
    (Taylor and Francis Ltd., 2012) Kirbaslar, F. Gülay; Dulger, Basaran; Turker, Gülen; Tavman, Aydin
    The samples of the Citrus leaves viz., bitter orange (Citrus aurantium L.), lemon (Citrus lemon (L.) Burin. f), mandarin (Citrus reticulata Blanco), bergamot (Citrus bergamia Risso et Poit.), orange (Citrus sinensis (L.) Osbeck), grapefruit (Citrus paradisi Macfayden), were collected from southern Turkey (Antalya) and their leaf oils were obtained by steam distillation. The compositions of orange and grapefruit leaf oils were identified. The major monoterpenes range of the orange and grapefruit leaf oils are 72.55 (sabinene: 42.85 %) and 76.45% (sabinene: 52.25 %), respectively. The antimicrobial activities of Turkish Citrus leaf oils were evaluated using the disk diffusion method toward nine bacteria and five yeasts, and the results are compared with those for antibiotics. The Citrus leaf oils showed strong antimicrobial activity against the test organisms (> 10 mm zone). All of the Citrus leaf oils are more effective towards K. fragilis (antifungal effect) than the other microorganisms. © 2012, Copyright Har Krishan Bhalla & Sons.
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    Antimicrobial activity of Turkish Citrus peel oils
    (2009) Gülay Kirbaşlar, F.; Tavman, Aydin; Dülger, Başaran; Türker, Gülen
    The samples of the Citrus fruits viz., lemon (Citrus limon (L.) Burm. f.), grapefruit (Citrus paradisi Macfayden), bergamot (Citrus bergamia Risso et Poit.), bitter orange (Citrus aurantium L.), sweet orange (Citrus sinensis (L.) Osbeck), mandarin (Citrus reticulata Blanco) were collected from southern Turkey (Antalya) in November 2006 and their peel oils were obtained by cold-pressing process. The antimicrobial activities of Turkish Citrus peel oils were evaluated using the disk diffusion method toward 9 bacteria and the results compared with those for penicilling, ampicillin, cefotaxime, vancomycine, oflaxacin and tetracycline. Antifungal activities were reported for Kluyveromyces fragilis, Rhodotorula rubra, Candida albicans, Hanseniaspora guilliermondii and Debaryomyces hansenii yeasts, and the results were referenced against nystatin, ketaconazole and clotrimazole antifungal agents. The Citrus peel oils showed strong antimicrobial activity against the test organisms. Lemon and bergamot peel oils have a little higher activity than the other Citrus peel oils.
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    ANTIMICROBIAL ACTIVITY OF TURKISH CITRUS PEEL OILS
    (Pakistan Botanical Soc, 2009) Kirbaslar, F. Guelay; Tavman, Aydin; Duelger, Basaran; Tuerker, Guelen
    The samples of the Citrus fruits viz., lemon (Citrus limon (L.) Burm. f.), grapefruit (Citrus paradisi Macfayden), bergamot (Citrus bergamia Risso et Poit.), bitter orange (Citrus aurantium L.), sweet orange (Citrus sinensis (L.) Osbeck), mandarin (Citrus reticulata Blanco) were collected from southern Turkey (Antalya) in November 2006 and their peel oils were obtained by cold-pressing process. The antimicrobial activities of Turkish Citrus peel oils were evaluated using the disk diffusion method toward 9 bacteria and the results compared with those for penicillin-g, ampicillin, cefotaxime, vancomycine, oflaxacin and tetracycline. Antifungal activities were reported for Kluyveromyces fragilis, Rhodotorula rubra, Candida albicans, Hanseniaspora guilliermondii and Debaryomyces hansenii yeasts, and the results were referenced against nystatin, ketaconazole and clotrimazole antifungal agents. The Citrus peel oils showed strong antimicrobial activity against the test organisms. Lemon and bergamot peel oils have a little higher activity than the other Citrus peel oils.
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    Öğe
    Investigation of Raman, FT-IR, EPR spectra and antimicrobial activity of 2-(5-H/Me/Cl-1H-benzimidazol-2-yl)-phenol ligands and their Fe(NO3)3 complexes
    (Springer, 2007) Tavman, Aydin; Agh-Atabay, Naz M.; Guner, Sadik; Gucin, Fahrettin; Dulger, Basaran
    2-(5-H/Me/Cl-1H-benzimidazol-2-yl)-phenol ligands form 1:1 electrolytes, 5-coordinate monometallic complexes with iron(III) nitrate. The geometry of the [Fe(L)(OH)(H2O)(2)](NO3) complexes was derived from theoretical calculation in DGauss/DFT level (DZVP basis set) on CACHE. In all of the complexes the ligands are bidentate, via one imine nitrogen atom and phenolate oxygen atom. The coordination is completed with a hydroxide ion, and two water molecules, adopting a distorted square pyramidal geometry. The structures of the compounds were confirmed on the basis of elemental analysis, molar conductivity, magnetic moment, FT-Raman, FT-IR (mid-IR, far-IR), EPR and u.v.-vis. The antimicrobial activities of the free ligands, their hydrochloride salts, and the complexes were evaluated using the disk diffusion method in dimethyl sulfoxide (DMSO) as well as the minimal inhibitory concentration (MIC) dilution method, against nine bacteria and the results are compared with several known antibiotic agents. Antifungal activities were reported for Candida albicans, Kluyveromyces fragilis, Rhodotorula rubra, Debaryomyces hansenii, Hanseniaspora guilliermondii, and the results were referenced against nystatin, ketaconazole, and clotrimazole antifungal agents. In most cases, the compounds tested showed broad-spectrum (Gram(+) & Gram(-) bacteria) activities that were either more active or as potent as the references.