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Adsorption of nitrous oxide on the(6,0) magnesium oxide nanotube

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Chinese Chemical Letters 2012年第11期23卷 1275-1278页

作者： Ali Ahmadi Peyghan Mohammad T.Baei Saeedeh Hashemian masoumeh moghimi Young Researchers Club Islamic Azad UniversityIslamshahr BranchTehranIran Department of Chemistry Azadshahr BranchIslamic Azad UniversityAzadshahrGolestanIran Department of Chemistry Yazd BranchIslamic Azad UniversityYazdIran Department of Chemistry Gonbad Kavoos BranchIslamic Azad UniversityGonbad KavoosGolestanIran

Nitrous oxide adsorption on the pristine （6,0） magnesium oxide nanotube was studied by using density functional theory calculations. We present the nature of the N2O interaction in selected sites of the nanotube. Adsorption energies corresponding to adsorption of the N2O on the nanotube were calculated to be in the range - 11.67 to -22.21 kJ mol- 1. Our results indicate that the N2O molecule has a weak physical adsorption on the pristine models due to weak Van der Waals interaction between the nanotubes and N2O molecule. The important results can be useful in production of the N2O sensors.

关键词： Magnesium oxide nanotube Adsorption N2O storage DFr

Low Complexity Adaptive Equalizers for Underwater Acoustic Communications

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China Ocean Engineering 2014年第4期28卷 529-540页

作者： masoumeh SOFLAEI Paeiz AZMI Faculty of Electrical and Computer Engineering Tarbiat Modares University

Interference signals due to scattering from surface and reflecting from bottom is one of the most important problems of reliable communications in shallow water channels. To solve this problem, one of the best suggested ways is to use adaptive equalizers. Convergence rate and misadjustment error in adaptive algorithms play important roles in adaptive equalizer performance. In this paper, affine projection algorithm （APA）, selective regressor APA（SR-APA）, family of selective partial update （SPU） algorithms, family of set-membership （SM） algorithms and selective partial update selective regressor APA （SPU-SR-APA） are compared with conventional algorithms such as the least mean square （LMS） in underwater acoustic communications. We apply experimental data from the Strait of Hormuz for demonstrating the efficiency of the proposed methods over shallow water channel. We observe that the values of the steady-state mean square error （MSE） of SR-APA, SPU-APA0 SPU-normalized least mean square （SPU-NLMS）, SPU-SR-APA0 SM-APA and SM-NLMS algorithms decrease in comparison with the LMS algorithm. Also these algorithms have better convergence rates than LMS type algorithm.

关键词： underwater acoustic communication affine projection algorithm (APA) selective regressor APA(SR-APA) selective partial update APA(SPU-APA) SPU-normalized least mean square (SPU-NLMS) algorithm set-membership APA(SM-APA) set-membership NLMS(SM-NLMS) algorithm

Exopolysaccharide produced by Vibrio neocaledonicus sp. as a green corrosion inhibitor:Production and structural characterization

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Journal of Materials Science & Technology 2018年第12期34卷 2447-2457页

作者： masoumeh Moradi Zhenlun Song Tao Xiao Key Laboratory of Marine Materials and Related Technologies Zhejiang Key Laboratory of Marine Materials and Protective TechnologiesNingbo Institute of Materials Technology and EngineeringChinese Academy of Sciences College of Materials Science and Engineering Taiyuan University of Technology

An exopolysaccharide substances produced by Vibrio neocaledonicus sp. was introduced as a novel green inhibitor against the corrosion of carbon steel in artificial seawater and acidic media. The produced extracellular polymeric substance（EPS） is heterogeneous with composition of polysaccharides, nucleic acids and protein and average molecular weight of 29,572 Da. Adsorption of EPS on the metal surfaces and formation of Fe-EPS complexes acted as a barrier to prevent the oxygen penetration and hindered anodic and cathodic reactions. The inhibitory effect increases with increasing EPS concentration and exposure time. The highest corrosion inhibitory effect（95.1%） was observed for 10 g/L of EPS after 5 days of exposure in seawater. This is the highest inhibitory effect ever been reported by EPSs. While, the optimum concentration of EPS with the highest inhibition efficiency in 1 N H;SO;was 1000 ppm. The influence of different parameters, such as initial pH, growth phase, various nitrogen and carbon sources on the production of EPS and its corrosion inhibitory effect were also investigated. According to results,the optimum culture medium for EPS production is contained artificial seawater including 5% mannitol as carbon source and 0.1%（NH;）;SO;as nitrogen source at pH = 8. This medium could produce 22.24 g/L EPS during 3 days’ incubation at 30 ℃. The corrosion inhibitory efficiency of obtained EPS was 95.97%.

关键词： Extracellular polymeric substances Vibrio neocaledonicus sp. Green corrosion inhibitor Chemical analysis

Micromorphological Aspects of Two Forest Soils Development Derived from Igneous Rocks in Lahijan, Iran

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Journal of Mountain Science 2012年第5期9卷 646-655页

作者： Hasan RAMEZANPOUR masoumeh POURMASOUMI Department of Soil Science College of AgricultureUniversity of Guilan

In order to characterize various micromorphologic properties of two forest soils derived from different parent rocks in Lahijan, and use the data collected from micromorphological analysis to interpret dominant pedogenic processes. Two representative soil pedons, granite （P1） and andesitic basalt （P2） were selected in a mountain landform with northwest aspect. Samples for thin section preparation were taken from each horizon by Kubiena boxes or clods. Micromorphological analysis of soils derived from these two soil pedons in eastern part of Lahijan （northern Iran） were conducted based on the physicochemical and mineralogical data. Micromorphological properties were characterized using a polarized light microscope under plain and cross light. Thin section study indicated that the nature of the parent material clearly affected the content of clay formation. It also showed that clay accumulation in the Bt horizons was not only due to clay illuviation （argillan）, but that strong in situ weathering of primary minerals also contributed to the enrichment of clay in soils derived from andesitic basalt. Comparing the results of clay mineralogy obtained from X-ray diffraction （XRD） with microscopic studies revealed that birefringence fabric （b-fabric） of the groundmass was partly striated due to smectitic minerals in soil of andesitic basalt （Hapludalf）, whereas speckled birefringence fabric was dominant in soil of granite （Udorthent） because of the absence of these minerals. We speculate that pores of skeletal fragments or microcracks in P1 were a place for illuvial clay protection. However, the main factor for flluvial clay film disruption （striation anddeformation） was biological activity （faunal turbation and root pressure） in P1 and expandable minerals and faunal turbation in P2.

关键词： Igneous rocks Illuviation Lahijan Soilmicromorphology Granite Andesitic basalt

Copper iodide nanoparticles on poly(4-vinyl pyridine) as new and green catalyst for multicomponent click synthesis of 1,4-disubstituted-l,2,3-triazoles in water

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Chinese Chemical Letters 2012年第7期23卷 797-800页

作者： Jalal Albadi Mosadegh Keshavarz masoumeh Abedini masoumeh Vafaie-nezhad Khatam Al-Anbia University of TechnologyBehbahanIran Department of Chemistry College of ScienceUniversity of GuilanRashtIran Department of Chemistry Gachsaran BranchIslamic Azad UniversityGachsaranIran

Poly（4-vinyl pyridine） supported nanoparticle of copper（Ⅰ） iodide is reported as a green and recyclable catalyst for the regioselective synthesis of 1,4-disubstituted-1H-1,2,3-triazoles from benzyl halides,sodium azide and terminal alkynes in water. This catalyst can be recovered by simple filtration and recycled up to 8 consecutive runs without any loss of its efficiency.

关键词： Click chemistry Poly(4-vinyl pyridine) supported Nanoparticles Copper(1) iodide Triazoles

Comparison of efficacy of folic acid and silymarin in the management of antiepileptic drug induced liver injury:a randomized clinical trial

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Hepatobiliary & Pancreatic Diseases International 2017年第3期16卷 296-302页

作者： masoumeh Asgarshirazi Mamak Shariat Mahdi Sheikh Department of Pediatrics Vali-asr HospitalTehran University of Medical SciencesTehranIran Maternal Fetal and Neonatal Research CenterTehran University of Medical SciencesTehranIran

BACKGROUND： Liver injury associated with antiepileptic drugs accounts for a large proportion of drug-induced liver injuries （DILI） in children. Although withdrawal of the causative agent is the only proved treatment for DILI, in some dinical situations it is not possible. Recent studies have reported promising results of using hepatoprotective drugs with antioxidant actions for the management of DILl. This study aimed to evaluate the efficacy of folic acid versus silymarin treatment in relation to decreasing liver enzymes in patients with DILI due to antiepileptic therapy. METHODS： This randomized, open-label, clinical trial evalu- ated 55 children with epilepsy who were on antiepileptic treat- ment and experienced DILL The children were randomized to receive either silymarin （5 mg/kg per day） or folic acid （1 mg per day） for one month and were followed up for three months. RESULTS： Liver enzymes significantly decreased in both groups. The decrease trend in alanine aminotransferase （ALT） and aspartate aminotransferase （AST） were stronger in the folic acid group compared to silymarin group （P=0.04 and P=0.007, respectively）. At the end of the study patients in the folic acid group had significantly lower ALT （P=0.04）, AST （P=0.02）, and gamma-glntamyl transferase （GGT）（P〈0.001） levels and also higher percentage of normal ALT （30.7% vs 3.4%, P=0.009） and AST （42.3% vs 0%, P〈0.001）, and GGT （23.1% vs 0%, P=0.008） values compared to the patients in the silymarin group. No rebound elevations in ALT, AST and GGT levels or adverse reactions were noted in neither of the study ***： Although both treatments were safe and effective in decreasing liver enzymes, folic acid seems to be superior to silymarin in the management of DILl.

关键词： anticonvulsant antiepileptic enzymes hepatitis hepatotoxicity

Static properties and semileptonic transitions of lowest-lying doubleheavy baryons

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Chinese Physics C 2023年第3期47卷 57-66页

作者： Zahra Ghalenovi masoumeh Moazzen Sorkhi Department of Physics Kosar University of BojnordIran

The static properties and semileptonic decays of ground-state doubly heavy baryons are studied in the framework of a non-relativistic quark *** a phenomenological potential model,we calculate the ground-state masses and magnetic moments of doubly heavy Ω and Ξ *** the heavy quark limit,we introduce a simple form of the universal Isgur-Wise function used as the transition form factor and then investigate the exclusive b→c semileptonic decay widths and branching fractions for 1/2→1/2 baryon *** obtained results are in agreement with other theoretical predictions.

关键词： hypercentral quark model double heavy baryons semileptonic decay

The influence of silane coupling agent and poplar particles on the wettability, surface roughness, and hardness of UF-bonded wheat straw(Triticum aestivum L.)/poplar wood particleboard

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Journal of Forestry Research 2014年第3期25卷 667-670页

作者： Seyedeh masoumeh Hafezi Kazem Doosthoseini Department of Wood and Paper Sciences and Technology Faculty of Natural Resources University of Tehran

We used silane coupling agents to improve the bonding ability between wheat straw particles and UF resin, and investigated surface properties （wettability and surface roughness） and hardness of parti-cleboard made from UF-bonded wheat straw （Triticum aestivum L.） combined with poplar wood as affected by silane coupling agent content and straw/poplar wood particle ratios. We manufactured one-layered particleboard panels at four different ratios of straw to poplar wood par-ticles （0%, 15%, 30% and 45% wheat straw） and silane coupling agent content at three levels of 0, 5% and 10%. Roughness measurements, average roughness （Ra）, mean peak-to-valley height （Rz）, and root mean square roughness （Rq） were measured on unsanded samples by using a fine stylus tracing technique. We obtained contact angle measurements by using a goniometer connected to a digital camera and computer sys-tem. Boards containing greater amounts of poplar particles had superior hardness compared to control samples and had lower wettability. Panels made with higher amounts of silane had lower Rq values.

关键词： wheat straw particleboard poplar wood surface properties,wettability silane coupling agent hardness

Synthesizing and characterizing the magnetic EDTA/chitosan/CeZnO nanocomposite for simultaneous treating of chromium and phenol in an aqueous solution

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Chinese Journal of Chemical Engineering 2023年第6期58卷 76-88页

作者： masoumeh Sheikh Hosseini Lori Mohammad Delnavaz Hoda Khoshvaght Faculty of Engineering Civil Engineering DepartmentKharazmi UniversityTehran 15719-14911Iran

A new magnetic nanocomposite chitosan/EDTA/CeZnO(MEC-CeZnO)is synthesized as an efficient and eco-friendly bio-compound for the removal of chromium Cr(VI)metal ions and phenol organic matters from aqueous *** are characterized using field emission scanning electron microscope,energy dispersive X-ray spectroscopy,transmission electron microscope,X-ray diffraction,X-ray photoelectron spectroscopy,Fourier transform infrared spectroscopy,diffuse reflection spectroscopy,and PL *** reduction rate of Cr(VI)ions and phenol degradation is evaluated under various experimental conditions,separately and *** average pore diameter and specific surface of MEC-CeZnO nanocomposite are obtained 50 nm and 210 m^(2)·g^(-1)respectively,which suggest the successful synthesis of the nanocomposite because of the increased surface area and reduced pores in comparison to previous ***,the best Cr(VI)and phenol reduction efficiencies are 98%and 92%at 180 min of retention time,both following the Langmuir-Hinshelwood first-order *** mechanisms of Cr(VI)and phenol removal from aqueous solutions involved Cr(VI)reduction,phenol oxidation,and *** the reusability of MEC-CeZnO showed that both degradation and recovery capacity is stable in 5 cycles.

关键词： Magnetic chitosan Chromium Phenol Photochemistry Nanoparticles Experimental validation