Islamic Azad University North Tehran Branch

About: Islamic Azad University North Tehran Branch is a education organization based out in Tehran, Iran. It is known for research contribution in the topics: Adsorption & Catalysis. The organization has 868 authors who have published 968 publications receiving 9987 citations.

Shannon information entropies for the three-dimensional Klein-Gordon problem with the Poschl-Teller potential

Abstract: The Shannon information entropies for the Klein-Gordon equations are evaluated for the Poschl-Teller potential, and the position-space information entropies for the ground and the excited states are calculated.

Simultaneous Echo Power and Doppler Frequency Measurement System Based on Microwave Photonics Technology

Abstract: A Doppler shift measurement system based on four-wave mixing effect in a highly nonlinear fiber is demonstrated practically. The system exhibits two low-frequency voltages, which are functions of the Doppler shift, and therefore, low-cost low-frequency photodetectors can be employed in the system. No sophisticated electrical instrument is required to perform the measurement. The scheme is able to simultaneously and independently measure the Doppler frequency of a radar echo and its power level with carrier frequency up to 40 GHz. The system is suitable to be employed in any microwave photonics (MWP) radar system with broad frequency agility characteristics or the other MWP systems operating based on frequency hopping technique.

CFD simulation of solid–liquid flow in a two impinging streams cyclone reactor: Prediction of mean residence time and holdup of solid particles

Abstract: The hydrodynamic behavior of a two impinging streams cyclone reactor (TISCR) was simulated using the computational fluid dynamics (CFD) technique. An Eulerian multiphase model has been used to compute the unsteady flow of a solid–liquid suspension in a 3D geometric configuration. The mean residence time ( t m ) and holdup of solid particles were calculated from a number of simulated results obtained at different solid and liquid flow rates. The CFD simulation results were compared with the experimental data available in the literature and a fairly well agreement was observed. Such a correlation was gradually improved with increasing solid flow rate.

Chemical Composition of the Essential Oil from Aerial Parts, Leaves, Flowers and Roots of Artemisia persica Boiss. from Iran

Abstract: Sixty constituents were identified in essential oil from aerial parts, leaves, flowers and roots of Artemisia persica Boiss. from Iran. The oils were obtained by hydrodistillation and the composition of the oils were analyzed by a combination of GC and GC/MS. The oils obtained from aerial parts were rich in (Z)-ocimenone (39.6%), ascaridole (16.0%) and α-terpinene (10.0%). The major components of the leaves oil were cis-sabinene hydrate (38.8%) and terpinolene (13.3%). The flowers oil was characterized by higher amounts of cis-sabinene hydrate (41.2%) and ethyl 2-nonynoate (24.4%). β-Cedren-9-one (76.7%) was the predominant compound in the roots oil.