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Composition, environment, and economic value of the Permian to Cretaceous coated grains from Zagros and the Persian Gulf

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International Journal of Sediment Research 2023年第3期38卷 316-334页

作者： mehrangiz naderi-khujin Vahid Tavakoli Pars Oil and Gas Company School of Geology College of Science University of Tehran

Ooid grainstone/packstone carbonate facies of the Dalan, Kangan, and Arab formations are the main hydrocarbon reservoirs in the Persian Gulf. Based on detailed petrographic and petrophysical analyses,sedimentological and mineralogical features of the Permian to Late Cretaceous carbonate and iron-rich coated grains from Zagros and the Persian Gulf were investigated. Frequent ooids in these formations indicate a high-energy environment and a wave-dominated shallow carbonate platform. Because of wide-spread Permian-Triassic epiric seas and long-lasting periods of arid and hot climate, Permian-Triassic carbonate ooids have more vertical and lateral distribution in comparison with Late Jurassic carbonate ooids. Dolomite, calcite, and anhydrite are the major minerals of carbonate ooid grains. Early Cretaceous iron-rich ooids have been deposited above a major Late Aptian disconformity during the highstand systems tract. Ooid ironstone bulk sample X-ray diffraction(XRD) analysis shows that goethite,siderite, fluorapatite, calcite, quartz, and pyrite are the major phases of ooid ironstone deposits. This layer of iron bearing ooids could have economic importance in its outcrops in the Zagros area. Late Cretaceous iron-rich coated grains(pisoid-oncoids) were deposited above the Sarvak exposure surface during the Late Cretaceous, long-lasting sea-level fall on the Arabian Plate. Boehmite, diaspore, hematite, and goethite are the main minerals of these kind of iron-rich deposits. Late Cretaceous karst-type bauxite deposits have also been reported from different sections of the Zagros area and have economic value for mining.

关键词： Coated grains Depositional conditions Permian Cretaceous Bauxite

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Fusion Energy and Stopping Power in a Degenerate DT Pellet Driven by a Laser-Accelerated Proton Beam

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Communications in Theoretical Physics 2016年第6期65卷 761-766页

作者： M.mehrangiz A.Ghasemizad S.Jafari B.Khanbabaei Department of Physics University of Guilan Department of Physics Damghan University

In this paper, we have improved the fast ignition scheme in order to have more authority needed for highenergy-gain. Due to the more penetrability and energy deposition of the particle beams in fusion targets, we employ a laser-to-ion converter foil as a scheme for generating energetic ion beams to ignite the fusion fuel. We find the favorable intensity and wavelength of incident laser by evaluating the laser-proton conversion gain. By calculating the source-target distance, proton beam power and energy are estimated. Our analysis is generalized to the plasma degeneracy effects which can increase the fusion gain several orders of magnitude by decreasing the ion-electron collisions in the *** is found that the wavelength of 0.53 μm and the intensity of about 1020W/cm^2, by saving about 10% conversion coefficient, are the suitable measured values for converting a laser into protons. Besides, stopping power and fusion burn calculations have been done in degenerate and non-degenerate plasma mediums. The results indicate that in the presence of degeneracy, the rate of fusion enhances.

关键词：激光驱动制动功率聚变能源质子束非退化弹丸 DT 等离子体

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Molecular Detection and Association of QnrA, QnrB, QnrSand BlaCMYResistance Genes among Clinical Isolates of Salmonellaspp. in Iran

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Advances in Microbiology 2014年第1期4卷 63-68页

作者： Raheleh Saboohi Bahareh Rajaei Nahid Sepehri Rad Mohamad Reza Razavi Mohammad Reza Aghasadeghi Arfa Moshiri Ahmad Reza Bahremand Keivan Kave Peiman Kave mehrangiz Zangeneh Mohammad Rahbar Sara Khorami Sarvestani Seyed Davar Siadat Department of Infectious Diseases Islamic Azad University Tehran Medical Branch Tehran Iran Department of Microbiology Iranian References Laboratory Research Center Ministry of Health and Medical Education Tehran Iran Department of Microbiology Pasteur Institute of Iran Tehran Iran Department of Microbiology Pasteur Institute of Iran Tehran Iran Department of Mycobacteriology & Lung Research Pasteur Institute of Iran Tehran Iran Department of Microbiology Pasteur Institute of Iran Tehran Iran Department of Stem Cells Division of Nanobiomaterials and Tissue Engineering National Institute of Genetic Engineering and Biotechnology Tehran Iran Department of Microbiology Pasteur Institute of Iran Tehran Iran Research Institute for Endocrine Sciences Shahid Beheshti University of Medical Sciences Tehran Iran Department of Mycobacteriology & Lung Research Pasteur Institute of Iran Tehran Iran Department of Veterinary Medicine Kermanshah University of Medical Sciences Kermanshah Iran Hope Generation Foundation Tehran Iran School of Management and Medical Informatics Isfahan University of Medical Sciences Isfahan Iran

Prevalence of three plasmid-mediated quinolone resistance determinant qnrA, qnrB, qnrS and extended spectrum Cephalosporins determinant blaCMY, among eighty-five isolates of Salmonella spp. collected in the community between 2008 and 2010 was determined by PCR. Not only qnr genes but also bla genes were positive in twenty-four different isolates. PCR assay detected that 22 of 85 (25.8%) Salmonella spp. carried the qnrA, 1 (1.17%) of 85 isolates harbored the qnrB, 1 (1.17%) of them contained the qnrS, 1 (1.17%) isolate carried all the three qnrA, qnrB, qnrS genes, 24 of 85 (28.2%) Salmonella carried blaCMY and 5 (5.88%) isolates carried qnrA and blaCMY. Antimicrobial susceptibility patterns of isolates were as follows: 49 (57.6%) exhibited resistance to Nalidixic acid and none of them to Ciprofloxacin. 33 (38.82%) isolates exhibited resistance to Cephalosporins and 2 (2.35%) of them exhibited ESBL phenotype and 12 (14.1%) isolates resistance to Ampicilin. These results were confirmed by MIC determination test as well. Having detected qnr and bla genes suggested that these genes spread antibiotic resistance among pathogenic bacteria.

关键词： QnrA QnrB QnrS ESBL (Extended-Spectrum Beta-Lactamase) BlaCMY

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