Güncel Gönderiler: Fen Fakültesi
Toplam kayıt 1154, listelenen: 621-640
-
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 ... -
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 ... -
GC-MS Analysis of the Antioxidant Active Fractions of Micromeria juliana with Anticholinesterase Activity
(Natural Products Inc, 2009)The aerial parts of Micromeria juliana (L.) Bentham ex Reichb. were extracted with light petroleum, acetone and methanol, successively. The antioxidant activity of different concentrations of the extracts was evaluated ... -
In vitro Study of Antibacterial Activity on Multi-Resistant Bacteria and Chemical Composition of the Chloroform Extract of Endemic Centaurea drabifolia subsp cappadocica
(Sage Publications Inc, 2009)The antimicrobial activity of the n-hexane, chloroform, ethyl acetate and ethanol extracts of the aerial parts of C. drabifolia S.M. subsp. cappadocica (DC.) Wagenitz (Asteraceae) was evaluated against microorganisms ... -
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 ... -
Antioxidant activities, metal contents, total phenolics and flavonoids of seven Morchella species
(Pergamon-Elsevier Science Ltd, 2009)Seven Morchella species were analyzed for their antioxidant activities in different test systems namely beta-carotene/linoleic acid, DPPH, reducing power, chelating effect and scavenging effect (%) on the stable ABTS(center ... -
Studies on the antioxidant activity of essential oil and different solvent extracts of Vitex agnus castus L. fruits from Turkey
(Pergamon-Elsevier Science Ltd, 2009)This study is designed to examine the chemical composition and antioxidant activity of the essential oil and different solvent extracts of Vitex agnus castus. GC and GC-MS analysis was resulted in the detection of 27 ... -
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 ... -
Effect of various hues of yellow as sticky trap color on leafminers in cucumber growing greenhouses
(Entomological Soc Turkey, Ege Univ, 2009)Yellow sticky traps are widely used in the management of several insect pests. Many studies were carried out on the effects of some factors such as trap size, vertical and horizontal positioning, and trap location on ... -
Adsorption of Cu(II) onto silica gel-immobilized Schiff base derivative
(Elsevier, 2009)4-chloroisonitroacetophenone 4-aminobenzylhydrazone (CAAH) chemically anchored on a silica gel surface, has been used for Cu(II) sorption from aqueous solution. The surface modification processes was performed after ... -
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 Braconidae (Hymenoptera) fauna with seven new records
(Entomological Soc Turkey, Ege Univ, 2010)This study was carried out to contribute to parasitoid fauna of Braconidae family (Hymenoptera) of Turkey. Specimens were collected with swepping net from cultivated and non-cultivated plants in various habitats of Turkey ... -
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 ... -
Investigation of light induced degradation in hydrogenated amorphous silicon-germanium alloy thin films using temperature dependent photoconductivity
(Wiley-V C H Verlag Gmbh, 2010)Light induced degradation of undoped hydrogenated amorphous silicon-germanium (a-SiGe:H) alloys with different Ge contents has been investigated using intensity and temperature dependence of photoconductivity between 78K ... -
The effect of aging on the dark conductivity and noise in hydrogenated microcrystalline silicon thin films
(Wiley-V C H Verlag Gmbh, 2010)Aging hydrogenated microcrystalline silicon in air is found to affect both the dark conductivity and the 1/f noise. For a sample with a crystalline volume fraction of 0.39, the conductivity decreased by three orders of ... -
Instability effects in hydrogenated microcrystalline silicon thin films
(Wiley-V C H Verlag Gmbh, 2010)Instability effects on the dark conductivity (sigma(Dark)) and photoconductivity (sigma(photo)) of microcrystalline silicon films with different microstructures deposited on smooth and rough substrates, after exposure to ... -
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, ... -
Ecological Features of the Pinus pinea Forests in the North-West Region of Turkey (Yalova)
(Foundation Environmental Protection & Research-Fepr, 2010)In this study, the phytosociological structure and ecological features of the Pious pinea forests in the Fistikli village of Yalova province in the north-west region of Turkey was investigated. From the phytogeographical ... -
Spatial distribution of the incompressible strips at AB interferometer
(Elsevier Science Bv, 2010)In this work, the edge physics of an Aharonov-Bohm interferometer (ABI) defined on a two dimensional electron gas, subject to strong perpendicular magnetic field B, is investigated. We solve the three dimensional Poisson ... -
The self-consistent calculation of exchange enhanced odd integer quantized Hall plateaus within Thomas-Fermi-Dirac approximation
(Elsevier Science Bv, 2010)We study the emergent role of many-body effects on a two-dimensional electron gas (2DEG) within the Thomas-Fermi-Dirac-Poisson approximation, including both the exchange and correlation interactions in the presence of a ...
