Ara
Toplam kayıt 351, listelenen: 31-40
Spectroscopic determination of acid dissociation constants of some pyridyl Shiff bases
(American Chemical Society, 2006)
The acid dissociation constants (pK(a)) of eight biologically active pyridyl Shiff bases were determined using a UV-vis spectroscopic technique at 25 +/- 0.1 degrees C. The first acidity constants (pK(a1)) of the ...
Synthesis, spectral studies of salicylidine-pyridines: Crystal and molecular structure of 2-[(1E)-2-aza-2-(5-methyl (2-pyridyl)ethenyl)]-4-bromobenzen-1-ol
(Pergamon-Elsevier Science LTD, 2007)
Schiff bases derived from different meta-substituted salicylaldehyde and 5-methylaminopyridine have been synthesized and characterized by elemental analysis, FT-IR, NMR and UV-vis techniques. NMR assignments were made using ...
Validated capillary electrophoresis study for the determination of cetirizine in pharmaceutical forms
(Taylor & Francis Inc, 2006)
A capillary electrophoretic method for the determination of cetirizine is described in this study. The method was developed by using a running buffer consisting of 10 mM of 10% methanol with pH 8.5, employing a fused silica ...
Preparation and characterization of activated carbon produced from pomegranate seeds by ZnCl2 activation
(Elsevier Science BV, 2009)
In this study, pomegranate seeds, a by-product of fruit juice industry, were used as precursor for the preparation of activated carbon by chemical activation with ZnCl2. The influence of process variables such as the ...
Vibrational spectroscopic study on some Hofmann type clathrates: M(1-Phenylpiperazine)(2)Ni(CN)(4)center dot 2G (M = Ni, Co and Cd; G = aniline)
(Elsevier Science BV, 2009)
New Hofmann type aniline clathrates in the form of M(PP)(2)Ni(CN)(4)center dot 2G (where pp = 1-phenylpiperazine, G = aniline and M = Ni. Co and Cd) have been prepared in powder form and FT-IR and Raman spectra have been ...
Cr(III)-imprinted polymeric beads: Sorption and preconcentration studies
(Elsevier Science BV, 2007)
The purpose of this study is to prepare a novel molecular imprinted adsorbent to Cr(III) analysis with high selectivity. Initially, chromium (III)-methacryloylhistidine (MAH/Cr(III)) complex monomer was synthesized and ...
Tetrakis[mu-4-(dimethylamino)benzoato-kappa O-2:O ']bis[(N,N-diethylnicotinamide-kappa N-1)zinc(II)]
(Int Union Crystallography, 2009)
The title molecule, [Zn-2(C9H10NO2)(4)(C10H14N2O)(2)], is a centrosymmetric binuclear complex, with Zn atoms [Zn center dot center dot center dot Zn ' = 2.8927 (4) angstrom] bridged by four carboxylate groups from 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.
Structural and optical properties of SnS semiconductor films produced by chemical bath deposition
(IOP Publishing LTD, 2009)
SnS films have been deposited at room temperature by the chemical bath deposition technique. The films have been examined to evaluate their structure, morphology, composition and optical properties. SnS films were ...
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 ...