Asadollah Hassankhani

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A Fourier transform infrared spectrometer has been coupled with an optical microscope to study the distribution and characteristics of the mineral phase in calcifying tissues at 20μ spatial resolution. This represents the first biophysical application of this technique. High quality spectra were obtained in a relatively short scan time (1–2 minutes) from(More)
In this study, the interaction of three [1,2,3,4]tetrazolo[5,1-b]-quinazolin-8-one derivatives with salmon sperm DNA and BSA was investigated experimentally and theoretically. Fluorescence and absorption spectroscopy techniques were applied to determine the probable interaction mechanism and correlated binding constants and thermodynamic parameters. It was(More)
Distinguishing atrial flutter (AFL) from ‘organized’ atrial fibrillation (AF) from the ECG is important for optimal therapy, yet remains difficult. We hypothesized that analyzing the temporal and spatial regularity (phase) of ECG F-waves would separate AFL, even with F-wave variability, from AF. We studied ECGs in patients with isthmus (IDAFL; n=19) and(More)
A series of thiophene derivatives were synthesized via one-pot multicomponent reactions of alkyl bromides, aroyl or alkanoyl isothiocyanates, 1,3-dicarbonyl compounds and secondary amines under microwave irradiation at 80°C. Particularly valuable features of this method include high yields of products, broad substrate scope, short reaction time and(More)
The eggshell (ES) supported Cu(OH)2 nanoribbons containing 8 wt.% Cu(2+) as a novel and heterogeneous catalyst was synthesized by simply adding an aqueous solution of CuSO4 on the eggshell support at ambient temperature. The nanocomposite system was characterized by scanning electron microscopy (SEM), transition electron microscopy (TEM), X-ray diffraction(More)
A new one-pot, simple and effective procedure is presented for the preparation of O-containing phosphorus ylides by the Michael addition reaction of N-methylpyrrole-2-carbaldehydoxime, pyridin-2-carbaldehydoxime or acetophenonoxime with acetylenic esters.
A novel synthesis of triazolo[1,2-a]indazole-1,3,8-trione derivatives by reaction of urazole, dimedone and aromatic aldehydes under conventional heating and microwave irradiation and solvent-free conditions using silica nanoparticles prepared from rice husk ash as catalyst is described. The new method features high yields, multicomponent reactions and(More)
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