Yayın tarihi için Fen Fakültesi listeleme
Toplam kayıt 1146, listelenen: 261-280
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Antioxidant and Anticholinesterase Activity Evaluation of ent-Kaurane Diterpenoids from Sideritis arguta
(Amer Chemical Soc, 2009)The petroleum ether and acetone extracts of the aerial parts of Sideritis arguta afforded two new and six known diterpenoids with the ent-kaurane skeleton. The structures of the new diterpenoids were determined as ent-7 ... -
Double-walled carbon nanotube based carbon paste electrode as xanthine biosensor
(Springer Wien, 2009)We describe the first usage of a double walled carbon nanotube (DWCNT) modified carbon paste electrode as biosensor transducer. Xanthine was chosen as a substrate for evaluation of the electrode performance. Proper amount ... -
The In Vitro Antimicrobial Activities of the Essential Oils of Some Lamiaceae Species from Turkey
(Mary Ann Liebert, Inc, 2009)In this study, antimicrobial activities of the essential oils obtained by using the hydrodistillation method from some lamiaceous plants-Mentha longifolia (L.) Hudson ssp. longifolia, M. longifolia (L.) Hudson ssp. typhoides ... -
Removal of cationic dyes by kaolinite
(Elsevier Science Bv, 2009)The removal of cationic dyes such as maxilon yellow 4GL (MY 4GL) and maxilon red GIRL (MR GRL) on kaolinite from aqueous solutions has been studied according to the adsorption method. The adsorbed amount of dyes on kaolinite ... -
Quantum Hall effect in a high-mobility two-dimensional electron gas on the surface of a cylinder
(Amer Physical Soc, 2009)The quantum Hall effect is investigated in a high-mobility two-dimensional electron gas on the surface of a cylinder. This special topology leads to a spatially varying filling factor along the current path. The resulting ... -
Current-direction-induced rectification effect on (integer) quantized Hall plateaus
(Edp Sciences S A, 2009)Current distribution across narrow Hall bars in out of linear response regime is studied within a self-consistent Hartree-type mean-field approximation for samples which are equally and unequally depleted laterally. The ... -
Interaction-mediated asymmetries of the quantized Hall effect
(Epl Association, European Physical Society, 2009)Experimental and theoretical investigations on the integer quantized Hall effect in gate-defined narrow Hall bars are presented. At low electron mobility the classical (high-temperature) Hall resistance line R(H)(B) cuts ... -
Electrostatic screening and experimental evidence of a topological phase transition in a bulk quantum Hall liquid
(Iop Publishing Ltd, 2009)The electrostatic screening of a medium disordered quantum Hall liquid was investigated using an electric field penetration (EFP) technique. At sufficiently low temperatures and at magnetic fields corresponding to the ... -
Investigation of temperature dependent dc current transport mechanism on Au/poly(4-vinyl phenol)/p-Si device
(Iop Publishing Ltd, 2009)In this study, temperature dependent current-voltage (I-V) measurements and investigation of the dc current transport mechanism of Au/poly(4-vinyl phenol)/p-Si device have been performed. While the series resistance value ... -
The Effect of Temperature on the Essential Oil Components of Salvia potentillifolia Obtained by Various Methods
(Sage Publications Inc, 2009)The chemical compositions of the essential oils of Salvia potentillifolia (Lamiaceae) were analyzed by GC and GC-MS. The oils were obtained by four different methods (hydrodistillation, steam distillation, and two extraction ... -
The effect of repeated annealing temperature on the structural, optical, and electrical properties of TiO2 thin films prepared by dip-coating sol-gel method
(Springer, 2009)In this study, we have studied the effect of repeated annealing temperatures on TiO2 thin films prepared by dip-coating sol-gel method onto the glasses and silicon substrates. The TiO2 thin films coated samples were ... -
A new record for Turkey: Michauxia nuda A.DC. (Campanulaceae)
(Tubitak Scientific & Technical Research Council Turkey, 2010)Michauxia nuda A.DC. (Campanulaceae) is recorded for the first time (C8 Siirt province) from Turkey. The diagnostic characters of M. nuda are described and its habitat and conservation status are indicated. Besides, it is ... -
Contributions to the Turkish Eulophidae (Hymenoptera, Chalcidoidea) with new records
(Entomological Soc Turkey, Ege Univ, 2010)This study was carried out to determine Eulophidae species, they have economical important for biological control, collected in various habitats in 2000 and between 2006-2008 in some provinces of Turkey. Specimens were ... -
Contributions to the Turkish Agromyzidae (Diptera) fauna with ten new records
(Entomological Soc Turkey, Ege Univ, 2010)This study was carried out between 2007- 2009 in some province of Turkey Specimens of leafminers were collected on cultured and non-cultured plants during 3 year In this study 10 new records belonging to 6 genera are found ... -
Contributions to the Dolichopodidae (Diptera) Fauna of Turkey
(Gazi Entomological Research Soc, 2010)Faunistic data are given for 5 species of Dolichopodidae, new to the fauna of Turkey and collected in the Marmara and Eagen regions. The following species are recorded for first time in Turkey Chrysotimus molliculus (Fallen, ... -
Lepiota rubella Bres., an unusual tropical American agaric from Turkey
(2010)Mycologists have presented some new records of macrofungi in recent years from Turkey (Solak et al., 2009; Baş Sermenli & Işıloğlu, 2009). In 2004 an exceedingly small, reddish brown lepiotaceous agaric was found with ... -
Morchella anatolica (Ascomycota), a new species from southwestern Anatolia, Turkey
(Taylor & Francis Inc, 2010)Morchella anatolica (Ascomycota, Pezizales, Morchellaceae), a new species collected from pine forest of southwestern Anatolia, Turkey, is described and illustrated. -
Evaluation of Antioxidant Activities of 3 Edible Mushrooms: Ramaria flava (Schaef.: Fr.) Quel., Rhizopogon roseolus (Corda) TM Fries., and Russula delica Fr.
(Korean Society Food Science & Technology-Kosfost, 2010)The methanolic extracts of Ramaria flava, Rhizopogon roseolus", and Russula delica were analyzed for their antioxidant, activities in different test systems including. beta-carotene/linoleic acid, 1.1-dipheny1-2-picrylhydrazyl ... -
Evaluation of metal concentration and antioxidant activity of three edible mushrooms from Mugla, Turkey
(Pergamon-Elsevier Science Ltd, 2010)This study is designed for the determination of metal concentrations, antioxidant activity potentials and total phenolics of Amanita caesarea, Clitocybe geotropa and Leucoagaricus pudicus. Concentrations of four heavy ... -
ON THE ADAPTIVE NADARAYA-WATSON KERNEL REGRESSION ESTIMATORS
(Hacettepe Univ, Fac Sci, 2010)Nonparametric kernel estimators are widely used in many research areas of statistics. An important nonparametric kernel estimator of a regression function is the Nadaraya-Watson kernel regression estimator which is often ...