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.

Survey on the genital Mycoplasmosis by multiplex PCR

Abstract: Mycoplasmas hominis, Mycoplasmas genitalium and Ureaplasma urealyticum are associated with infections of the genitourinary tract, reproductive failure, and neonatal morbidity and mortality. A multiplex PCR was developed for simultaneously detection of these Mycoplasmas species in a single amplification reaction. The total number of 104 samples was collected from 104 women’s genital specimens with urogenital infections for identification of M.hominis, M.genitalium and U.realyticum by multiplex PCR. The High Pure PCR Template Preparation Kit purified nucleic acids from 100 μl of specimen (American, Roche Company). In addition to the kit, boiling method was used to extraction of DNA from samples. UUA2 and UUS2 primers were used for urease gene amplification of U.urealyticum, MH1 and MH2 used for 16S rRNA gene amplification of M.hominis, and Adhesionproteingene (MgPa) used for 16S rRNA gene amplification of M.genitaliumin all samples. The number of 28 samples (27%) was positive for Mycoplasmas. M.hominis, M.genitalium,and U.urealyticum were detected in 8.7, 3.9, and 14.5 percent of samples, respectively. The accumulated frequencies for M.hominis, M.genitalium,and U.urealyticum were 9(8.7%), 4(3.9%), and 15(14.5 %), respectively. The results of this study revealed that Multiplex PCR is a highly sensitive, specific and cost-effective test for screening of genitourinary tract infections.

A Novel GH-92 Nano-Adsorbent Using the Sponge from the Persian Gulf for Lead and Cadmium Removal

Abstract: pollutants from aquatic ecosystems, especially from drinking water, has always been a major concern for scientists. Recent decades have witnessed the widespread application of natural compounds used as adsorbents to remove various pollutants. On the other hand, studies have proved nanotechnology to be an effective way of removing pollutants. A new type of sponge belonging to the family Demospongiae that has nano holes and is native to the Persian Gulf was investigated for the first time in the present study for use as an adsorbent to remove calcium, magnesium, cobalt, cadmium, and lead ions from water. For this purpose, adbsorption in sponges of different aggregate sizes, contact time, particle size, and ambient pH were measured. The results showed that the proposed sponge is capable of adsorbing the above-mentioned metal ions to various degrees. While small amounts of calcium, magnesium, and cobalt were adsorbed by this sponge, cadmium recorded a higher adsorption of 2.37 mg/g at pH=5. The highest adsorption level of 79.19 mg per gram of adsorbent was recorded for lead at a pH range of 4.5-5 with a mesh size of 230. This is the highest adsorption ever recorded for lead in the literature on selective separation of lead from the other ions.

Bis[1-(2-eth­oxy­phen­yl)-3-(4-nitro­phen­yl)triazenido]mercury(II)

Abstract: In the title compound, [Hg(C14H13N4O3)2], the central Hg atom (site symmetry 2) is six-coordinated by two tridentate 1-(2-eth­oxy­phen­yl)-3-(4-nitro­phen­yl)triazenide ligands through two N and one O atoms. The mononuclear complex mol­ecules are connected into two parallel chains by inter­molecular C—H⋯O hydrogen-bonding inter­actions. These chains are connected to each other by face-to-edge C—H⋯π inter­actions between the CH of the ethoxy groups and the aromatic rings, resulting in a two-dimensional architecture in the ac plane.

Phase transition of modified Horndeski gravity with new method

Abstract: In this paper, we investigate the critical points of the $ P-V $ diagram and the phase transitions of the Horndenski black holes. In fact, the usual Horndeski black holes do not have $ P-V $ critical points, hence do not show any phase transitions. However, we successfully modify the Horndeski black hole solution to obtain such a phase transition behavior. This modified black holes solution is satisfied by the equation of state of liquid-gas phase transition. Also, we study the thermodynamics of our modified Horndeski black hole by applying a new method based on the equation of state that originated from the slope of temperature versus entropy. This new prescription provides us a simple powerful way to study the critical behavior and the phase transition of the black holes and concludes the novel results. The analytical interpretation of possible phase transition points leads us to set some nonphysical range on the horizon radius for the black hole.