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.

Modelling and an improved NSGA-II algorithm for sustainable manufacturing systems with energy conservation under environmental uncertainties: a case study

Abstract: This study addresses a flexible job shop scheduling problem considering the energy tax regulations. We introduce two strategies as reactive scheduling to deal with two different kinds of uncertaint...

New kinetic models for the crystallization of anatase nanoparticles from amorphous titania (TiO2)

Abstract: In this article, amorphous Titania (TiO2) nanoparticles were crystallized both in a solution environment and by a dry heat treatment using new kinetic models with the capabilities of more accurately predicting the polymorphic transformation behavior of TiO2. In these models, both the nucleation and growth processes were simultaneously taken into account. The results were indicative of the Surface Nucleation (SN) of anatase occurring in a hydrothermal treatment process through the phase transformation. Also, both the surface and interface nucleation processes were found to play significant roles in the phase transformation kinetics when dealing with dry heat treatments at low temperatures. The proposed models were advantageous to any other published models, in which the nucleation mechanisms had been incorporated with suitable growth expressions. In other words, no experimental data of a particle size were required to investigate the phase transformation kinetics of TiO2 nanoparticles in the models...

Propane-1,2-diammonium bis­(pyridine-2,6-dicarboxyl­ato-κ3O,N,O′)nickelate(II) tetra­hydrate

Abstract: The reaction of nickel(II) nitrate hexa­hydrate, propane-1,2-diamine and pyridine-2,6-dicarboxylic acid in a 1:2:2 molar ratio in aqueous solution resulted in the formation of the title compound, (C3H12N2)[Ni(C7H3NO4)2]·4H2O or (p-1,2-daH2)[Ni(pydc)2]·4H2O (where p-1,2-da is propane-1,2-diamine and pydcH2 is pyridine-2,6-dicarboxylic acid). The geometry of the resulting NiN2O4 coordination can be described as distorted octa­hedral. Considerable C=O⋯π stacking inter­actions are observed between the carboxyl­ate C=O groups and the pyridine rings of the (pydc)2− fragments, with O⋯π distances of 3.1563 (12) and 3.2523 (12) A and C=O⋯π angles of 95.14 (8) and 94.64 (8)°. In the crystal structure, a wide range of non-covalent inter­actions, consisting of hydrogen bonding [O—H⋯O, N—H⋯O and C—H⋯O, with D⋯A distances ranging from 2.712 (2) to 3.484 (2) A], ion pairing, π–π [centroid-to-centroid distance = 3.4825 (8) A] and C=O⋯π stacking, connect the various components to form a supra­molecular structure.

Photocatalytic Degradation of Azo Dye Acid Yellow 23 in Water Using NiFe2O4 Nanoparticles Supported on Clinoptilolite as a Catalyst in a Circulating Fludized Bed Reactor

Abstract: In this investigation photocatalytic degradation of the azo dye Acid Yellow 23 (AY23) in water studied. NiFe2O4 nanoparticles was supported on Clinoptilolite (NiFe2O4/CP) using a precipitation method. NiFe2O4/CP catalysts have been characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD) and BET surface area analysis. Optimum conditions were determined for the removal of Acid Yellow 23 (AY23) dye in water using a factor at the time the experimental design method in a circulating fludized bed reactor under UV irradiation. The results showed that pH= 5, photocatalyst amount = 40 (mg/l), H2O2 concentration = 30 ppm and temperature = 20 0 C was optimum conditions for this reaction. A first order reaction with k= 0.0214 min −1 was observed for the photocatalytic degradation reaction. The results showed that UV/NiFe2O4/CP process was more effective in degradation of Acid Yellow 23 dye. KEYWORDS: Acid Yellow 23, Photodegradation, UV/NiFe2O4/CP, Circulating fludized bed reactor.

The Evaluation of Hepatitis C Virus Core Antigen in Immunized Balb/C Mice

Abstract: Background Hepatitis infection represents one of the important causes of morbidity and mortality in developing countries, however there is not any effective vaccine against hepatitis C which is one of the significant problems in vaccine project.