Güncel Gönderiler: Fen Fakültesi
Toplam kayıt 1154, listelenen: 321-340
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The flora of steppe surrounding Akyurt and Kalecik ( Ankara )
(1999)The study area, occurs in Ankara Province. During the period 1992-1994, by evaluating the collected 620 herbarium specimens, 50 families, 169 genera, 326 species, 4 subspecies and 1 varieties were identified. The number ... -
Kurşun nitratın (Pb(No3)2) arpa (Hordeum vulgare L.) mitotik kromozomları üzerine etkileri
(2002)u çalışmada farklı dozlardaki Kurşun Nitratın Arpa kök ucu hücreleri üzerine , sitogenetik etkileri çalışıldı. Arpa tohumları 0.5, 1.0 ve 5.0 mg/ml kurşun nitrat ihtiva eden çözelti ile 12, 24 ve 48 saat muamele edildi. ... -
Tuz stresi altındaki mısır bitkisinde (Zea mays L.) stres parametreleri üzerine Ca, MG VE K' nın etkileri
(2006)Tuz stresi altındaki mısır bitkisinde (Zea mays L.) stres parametreleri üzerine (membran geçirgenliği, nispi su içeriği, prolin, klorofil ve karotenoid miktarları ile yaprak ve köklerde makro elementler) kalsiyum (Ca), ... -
The vegetation of Cimen Mountain (Kahramanmaras)
(2001)This investigation was carried out between 1995 and 1996 in order to research the vegetation of imen Mountain (Kahramanmaraß). The research area is situated at about 20 km to the south-west of Kahramanmaraß. Vegetation ... -
Lenzitopsis oxycedri Malençon and Bertault (Thelephoraceae, Basidiomycota), a very rare wood-decay fungus collected in Turkey
(2007)Türkiye'nin Güney Akdeniz bölgesinde bulunan Antalya-Termessos Milli park'ında Juniperus foetidissima Willd. nın canlı dalı üzerinde Lenzitopsis oxycedri Malençon & Bertault toplandı. Bu çok nadir tür Thelephoraceae'nin ... -
Searching for Color Octet Leptons in Lepton-Hadron Collisions
(2003)We study the resonance production of color octet leptons ${l_8}$ predicted by composite preon models of leptons and quarks at lepton-hadron colliders such as TESLA x HERA,$\mu p$ and Linac-LHC with the energy of about 1-10 ... -
Barley powdery mildew (Erysiphe graminis DC f. sp. hordei MARCHAL) in the Aegean Region
(2001)This research was carried out to measure the field reaction of Turkish and some foreign originated barley varieties of which resistance genes were previously tested. In this research, 21 two-rowed barley and 8 six rowed ... -
Determination of defect distribution in a Ga-rich ZnO/CdS/Cu (In, Ga) $Se_2$ solar cell by admittance spectroscopy
(2005)This article presents a study on the energy distribution of defects in efficient thin film ZnO/CdS/Cu(In,Ga)$Se_2$ heterojunction solar cell by the use of admittance spectroscopy. The capacitance spectra of the device has ... -
The Effects of Science Teaching Through Team Game Tournament Technique on Success Level and Affective Characteristics of Students
(2008)The purpose of this study is to investigate the effects of teaching a unit & #8220; Reproduction and Growth in Living Things& #8221; from the science curriculum of 8th graders by using Team Game Tournament (TGT) ... -
Real gamma scattering at TESLA x N collider
(2001)The proposal for measurement of polarized gluon and quark distributions in scattering of polarized real y beam on polarized nuclear target have been considered. High energy y beam is obtained by backscattering of laser ... -
Admittance and impedance spectroscopy on Cu(In,Ga)Se2 solar cells
(2003)The present work reports some experimental results on the electrical properties of high efficiency ZnO/CdS/Cu(In,Ga)Se2 heterojunction solar cells. Admittance spectroscopy has been employed for characterisation of the bulk ... -
Application of microwave–assisted digestion to trace heavy metal determination in sea sediment sample
(2008)The main goal of this study is to develop an efficient microwave digestion method for the determination of Pb, Cu, Cr, Co and Zn elements from a sea sediment sample. Microwave acid digestion techniques were investigated ... -
Gold nanoparticle synthesis and characterisation
(2009)The aim of this study is to synthesize and characterize gold nanoparticles. For this purpose, the reduction reaction between tetrachloroauric acid and sodium citrate was used. At the end of the reduction reaction, gold ... -
Raman scattering in layered CdInGaS4
(2004)Raman scattering spectra of CdInGaS4 crystals grown by the chemical transport method were measured at room and liquid-nitrogen temperatures. Band pairs at 29-38, 43-48 and 60-65 $cm^{-1}$ are reported for the first time. ... -
Influence of nitrate, phosphate and herbicide stresses on nitrogenase activity and growth of cyaobacteria isolated from paddy fields
(2007)Samples were collected from paddy fields in Corum-TURKIYE. Nitrogen-free BG-11 medium was used for isolation of nitrogen fixing cyanobacteria. Acetylene reduction technique was used to determine the effects of different ... -
Irreducible polynomials by the polytope method over integral domains
(2005)Ostrowski realized that there is a relation between the factorization of a multivariate polynomial over any field and the integral decomposition of the Newton polytope of this polynomial. Here, we extended this result to ... -
Urease immobilized piezoelectric quartz crystal for urea conversion
(2008)In this study, the immobilization of the enzyme urease on the surface of the quartz crystal was reported. The layer growth on silver electrode resonator was monitored with QCM and the catalytic activity of the enzyme layer ... -
Photopolymerized poly(Ethylene glycol) diacrylate hydrogels for controlled release of ketoprofen
(2009)In this study, poly(ethylene glycol-diacrylate) (PEG-DA) hydrogels with two different concentrations, 30% and 50% w/w, were prepared by free radical polymerization method. Ethylene glycol dimethacrylate (EGDMA) and ... -
Carrier free cross-linked peroxidase aggregates: synthesis and characterization
(2008)In this study, cross-linked Horseradish Peroxidase (HRP) aggregates were prepared. Bovin Serum Albumin (BSA), a proteic feeder, and glutaraldehyde, a bifunctional reactive, a crosslinker agent has also been used. The initial ... -
Chelating agent effect on the release of gentamicin from PEG-DA hydrogels
(2008)In this study, controlled drug release devices of poly(ethylene glycol-diacrylate) (PEG-DA) hydrogels were prepared by free radical UV polymerization. PEG-DAmacromere was cross-linked with different percentages of ethylene ...
