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.

Synthesis and Characterization of New Schiff Bases of Ethylenediamine and Benzaldehyde Derivatives, Along with Their Iron Complexes

Abstract: Two new symmetrical Schiff bases have been prepared by the condensation of ethylenediamine and two benzaldehyde derivatives, 2-hydroxybenzaldehyde and 2,4-dimethoxybenzaldehyde. The electronic transitions within these Schiff bases molecules in chloroform solvent have been investigated by UV-Vis spectroscopy. The 1H NMR and IR spectra were studied and assigned to related groups. Furthermore, Two iron complexes with mentioned Schiff base have been synthesized by the reaction of titled ligands and transition metal ion, Fe (III) in the ratio of 1:1. The iron complexes have been characterized as well.

Memory loss risk assessment for the students nearby high-voltage power lines-a case study.

Abstract: With increasing sources of alternating current electromagnetic fields (EMFs) in everyday life, their possible harmful effects on human health are a main area of concern in many countries. Given that children are the most valuable assets of each country, it is of utmost importance to study the effect(s) of EMF exposure on various health aspects of members within this age group. The present research is the first systematic study of the effects of exposure to electric substations on the memory status of male students in the age group of 10 to 12 years. The flux density values of extremely low frequency magnetic field were measured at four elementary schools in Tehran in accordance with IEEE std 644–1994. The device was 3-axis (X, Y, and Z) Gauss Meter, model: TES-1394. The students from two schools nearby a high voltage electricity substation (at distances of 30 and 50 m) were selected as the exposed group, and the students of two other schools at further distances of 1390 and 610 m were considered as the control group. To determine the status of working memory in the students, the questionnaire was adapted from Wechsler Intelligence Scale for Children (WISC-IV). The completed questionnaires were analyzed by t test and chi-square using SPSS 20. The average magnetic flux density was 0.245 μT at case schools and 0.164 μT at control schools, P < 0.01. The demographic characteristics of the students in the two groups were not statistically different. However, the difference in working memory was significant at the level of 5 %. The results of the questionnaire data showed that students in the control group had better working memory compared to students in case group. The findings revealed a reverse correlation between magnetic flux density and working memory of students (R = −0.255). It is concluded that extremely low frequency magnetic field exposure may have a negative impact on the working memory of children, but further studies are necessary to reach a definitive conclusion.

Tris(4,4'-bi-1,3-thia-zole-κN,N')iron(II) tetra-bromidoferrate(III) bromide.

Abstract: In the [Fe(4,4′-bit)3]2+ (4,4′-bit is 4,4′-bi-1,3-thia­zole) cation of the title compound, [Fe(C6H4N2S2)3][FeBr4]Br, the FeII atom (3 symmetry) is six-coordinated in a distorted octa­hedral geometry by six N atoms from three 4,4′-bit ligands. In the [FeBr4]− anion, the FeIII atom (3 symmetry) is four-coordinated in a distorted tetra­hedral geometry. In the crystal, inter­molecular C—H⋯Br hydrogen bonds and Br⋯π inter­actions [Br⋯centroid distances = 3.562 (3) and 3.765 (2) A] link the cations and anions, stabilizing the structure.

Hexaaqua-magnesium(II) bis-(pyridinium-2,6-dicarboxyl-ate).

Abstract: In the title compound, [Mg(H2O)6](C7H4NO4)2, a single six-coordinate Mg2+ cation (site symmetry 2/m) is bonded to six water mol­ecules in a distorted octa­hedral geometry. The crystal packing between the complex cation and the zwitterionic organic cation (m symmetry) is stabilized by inter­molecular O—H⋯O hydrogen bonds and weak inter­molecular C—H⋯O inter­actions.