Browsing Department of Chemistry by Issue Date
Now showing items 21-40 of 707
-
A study of the chemiionization reactions of Ca, Sr and Ba with O2(X 3Σ-g)
(1994)Chemielectron and chemiion spectra resulting from the reactions of effusive beams of Ca, and Sr and Ba (in their ground 1S states) with ground state molecular oxygen O2(X 3Σ- g) have been recorded using electron spectroscopy ... -
Sorption of radioiodine on organic rich soil, clay minerals and alumina
(Kluwer Academic Publishers, 1994)Batch method was used to investigate the sorption behavior of radioiodine on organic rich soil, alumina, chlorite-illite clay mixture and bentonite.131I was used as tracer. The grain sizes of the samples used were all below ... -
Radiochronology of sediments from the Mediterranean sea using natural 210Pb and fallout 137Cs
(Kluwer Academic Publishers, 1994)The210Pb and137Cs profiles of sediment cores from two locations in southern Spain, three locations in southern Turkey and two locations in northern Cyprus were determined by direct γ-ray spectroscopy. Sedimentation rates ... -
Sorption behavior of Co2+, Zn2+ and Ba2+ ions on alumina, kaolinite and magnesite
(Kluwer Academic Publishers, 1994)The sorption behavior of Ba2+, Co2+ and Zn2+ ions on alumina, kaolinite and magnesite have been investigated using the batch method.60Co,65Zn and133Ba were used as radiotracers. The mineral samples were separated into ... -
Influence of even nucleon numbers and closed shells on mass and charge distribution in low energy fission
(Kluwer Academic Publishers, 1994)Extensive experimental and evaluated yield data are now available for the fragments in low energy nuclear fission. Using these data we re-examined the influence of even nuclear numbers and closed shells on the mass and ... -
Variation of stability constants of thorium and uranium oxalate complexes with ionic strength
(De Gruyter Oldenbourg, 1994)The extraction of Th(IV) and UO!+ by a solution of TTA and HDEHP, respectively in toluene has been used to obtain stability constants of their oxalate complexes at 298 Κ in 1, 3, 5, 7 and 9 Μ ionic strength (NaC104) ... -
A conducting composite of polypyrrole I. synthesis and characterization
(Elsevier, 1994-02)A conducting composite of polypyrrole was prepared via electrochemical methods. A polyamide was used as the insulating matrix polymer. The characterization of the composite was done by FT-IR, SEM, TGA, DSC and pyrolysis ... -
Investigation of thin films SiO2 obtained by low temperature plasmachemical deposition
(American Institute of Physics, 1994-07-26) -
Visible photoluminescence from thin films of SiOx prepared by low-temperature plasmachemical deposition
(American Institute of Physics, 1994-07-26) -
Migration behaviour of Barium and Strontium in Granite
(De Gruyter Oldenbourg, 1994-12-01)The sorption behaviour of Ba2+ and Sr2+ cations on granite have been studied under flowing and static conditions in column and batch experiments. 133Ba, 90Sr and 3H were used as radio tracers. The retardation factors, R1, ... -
A conducting composite of polypyrrole II. As a gas sensor
(Elsevier, 1995)Pure polypyrrole (PPy) and polypyrrole-polyamide (PPy-PA) composite films were synthesized electrochemically. The gas-sensing ability was investigated for both pure PPy and PPy-PA films. The composite films' response to ... -
Radiochemical studies of the sorption behavior of strontium and barium
(Kluwer Academic Publishers, 1995)The sorption behavior of strontium and barium on kaolinite, bentonite and chlorite-illite mixed clay was studied by radioanalytical techniques using the batch method.90Sr (29.1 y) and133Ba (10.5 y) were used as radiotracers. ... -
IR and turbidity studies of vitamin E-cholesterol-phospholipid membrane interactions
(Kluwer Academic Publishers-Plenum Publishers, 1995)Binary and tertiary mixture of α-tocophenol, cholesterol and dimyristoylphosphatidylcholine in the form of multilamellar liposomes were investigated by Fourier Transform Infrared and visible spectroscopy. Results of the ... -
Instrumental neutron activation analysis of blood serum
(Kluwer Academic Publishers, 1995)Instrumental neutron activation analysis has been used to determine 15 trace elements in twelve blood serum samples taken from healthy students at Bilkent University in Ankara. The method allowed the determination of Sc, ... -
High-voltage optical emission in binary gaseous mixtures of N2
(Elsevier, 1995)Optical emission in 1:1 binary gaseous mixtures under high voltage displays a varying character depending on pressure, applied voltage polarity, and chemical nature of the mixture. Under negative polarity, in pure N2 and ... -
A photoelectron spectroscopic investigation of conducting polypyrolle-polyamide composite film
(Elsevier, 1995-04)X-ray photoelectron spectrum of the electrochemically prepared polypyrrole and polypyrrole-polyamide composite films exhibit an additional strong high binding energy peak at 402.0 eV corresponding to N+ moieties. Intensity ... -
Electron spectroscopic investigations of CdS and CdTe electrochemically coated on glass
(Springer, 1996)The electrodeposition of CdS and CdTe is investigated to improve the stoichiometric properties of CdS/CdTe layers on ITO-glass substrates for solar cell applications. X-ray photoelectron spectroscopy is utilized for the ... -
Analyses of products from autoclave reactions: Derivation of reaction parameters
(1996)This work presents energetics for high pressure hydroprocessing reactions derived from post analyses of liquid and gaseous products. Specifically, GC and GC/MS were used to follow the product distribution from the hydrocracking ... -
Conducting polymer composites of polypyrrole and polyindene
(Elsevier, 1996)Polypyrrole-polyindene composites were prepared via electrochemical methods. Two different approaches were utilized. In the first, the electro-initiated polymerization of indene on a platinum electrode was achieved at 2.0 ... -
Electron spectroscopic investigation of Sn coatings on glasses
(Springer, 1996)Float glasses of different thicknesses and a conducting tin oxide glass have been investigated using Photo and Auger Electron Spectroscopy induced by AlKα X-rays. On the basis of measured chemical XPS shifts in the binding ...
