Ara
Toplam kayıt 53, listelenen: 21-30
H-1 C-13 NMR and (n)J(CH) coupling constants investigation of 4-Phenylpyridine: A combined experimental and theoretical study
(Elsevier Science BV, 2007)
Proton coupled and uncoupled C-13, H-1, DEPT, COSY and HETCOR NMR spectra of 4-Phenylpyridine (4-Phpy) have been reported for the first time except for its H-1 NMR spectrum. In order to provide a precise structural elucidation ...
The determination of the optical band and optical constants of non-crystalline and crystalline ZnO thin films deposited by spray pyrolysis
(Natl Inst Optoelectronics, 2007)
The optical constants and optical band gaps of the non-crystalline and crystalline zinc oxide (ZnO) thin films deposited by the spray pyrolysis method onto glass substrates at the different deposition times have been ...
Investigations on the physical properties of the polycrystalline ZnS thin films deposited by the chemical bath deposition method
(2007)
Transparent and polycrystalline zinc sulfide (ZnS) thin films were prepared by the chemical bath deposition (CBD) technique onto glass substrates deposited at 80 °C using aqueous solution of zinc acetate, thiourea, ...
Variation of photoluminescence from Si nanostructures in SiO2 matrix with Si+ post implantation
(2007)
Si nanoclusters were formed by 28Si ion implantation into SiO2 matrix and subsequently annealed at 1050 °C for 2 h under N2 ambient. The photoluminescence (PL) characteristics depend on the 28Si fluence. The PL signals ...
Beta-transition properties for neutron-rich Sn and Te isotopes by Pyatov method
(Indian Acad Sciences, 2007)
Based on Pyatov's method, the low-lying Gamow-Teller (GT) 1(+) state energies and log(ft) values for Sb-128,Sb-130,Sb-132 and I-132,I-134,I-136 isotopes have been calculated. In this method, the strength parameter of the ...
Dielectric behavior of the catalyst zeolite NaY
(Scientific Technical Research Council Turkey-Tubitak, 2007)
Zeolites are crystalline hydrated aluminosilicates of alkaline and alkaline earth metals. The basic zeolite structure is an anionic frame of Si and Al T-atoms, which are tetrahedral and coordinated with oxygen atoms. The ...
N-acylbenzotriazole mediated synthesis of some methacrylamido amino acids
(Bentham Science Publ LTD, 2007)
N-acylbenzotriazole mediated synthetic methodology for introducing methacryloyl ( MA) group onto amino acids with complete retention of chirality has been disclosed.
Purification of penicillin acylase through a monolith column containing methacryloyl antipyrine
(Elsevier Science BV, 2007)
The aim of this work was to test a chromatographic support containing 4-amino-antipyrine for its ability to purify penicillin acylase in crude extract and pure penicillin acylase. First, methacryloyl antipyrine (MAAP) as ...
Measurements of radon concentrations in well waters near the Aksehir fault zone in Afyonkarahisar, Turkey
(Pergamon-Elsevier Science LTD, 2007)
Afyonkarahisar is located in the mid-west Anatolia in Turkey where Aksehir fault zone lies. This earthquake active zone has produced earthquakes in magnitudes from 3.0 to 7.1 in Richter scale. The Rn-222 concentrations in ...
Mimicking receptor for methylmercury preconcentration based on ion-imprinting
(Elsevier Science BV, 2007)
Solid-phase extraction (SPE) based on molecularly imprinted polymers (MIPs) were used to develop selective separation and preconcentration for methylmercury ion from complex matrixes. In this study, an ion-imprinting polymer ...