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Experimental investigation into L-Arg and L-Cys eco-friendly surfactants in enhanced oil recovery by considering IFT reduction and wettability alteration

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Petroleum Science 2020年第1期17卷 105-117页

作者： hamed foroughi asl Ghasem Zargar Abbas Khaksar Manshad Mohammad Ali Takassi Jagar A.Ali Alireza Keshavarz Department of Petroleum Engineering Abadan Faculty of Petroleum EngineeringPetroleum University of Technology(PUT)AbadanIran Department of Petroleum Engineering Ahwaz Faculty of Petroleum EngineeringPetroleum University of Technology(PUT)AhwazIran Department of Petroleum Engineering Faculty of EngineeringSoran UniversitySoranKurdistan RegionIraq Department of Petroleum Engineering College of EngineeringKnowledge UniversityErbilKurdistan RegionIraq School of Engineering Edith Cowan UniversityJoondalupWA 6027Australia

Surfactant flooding is an important technique used to improve oil recovery from mature oil reservoirs due to minimizing the interfacial tension(IFT)between oil and water and/or altering the rock wettability toward water-wet using various surfactant agents including cationic,anionic,non-ionic,and amphoteric *** this study,two amino-acid based surfactants,named lauroyl arginine(L-Arg)and lauroyl cysteine(L-Cys),were synthesized and used to reduce the IFT of oil–water systems and alter the wettability of carbonate rocks,thus improving oil recovery from oil-wet carbonate *** synthesized surfactants were characterized using Fourier transform infrared spectroscopy and nuclear magnetic resonance analyses,and the critical micelle concentration(CMC)of surfactant solutions was determined using conductivity,pH,and turbidity *** results showed that the CMCs of L-Arg and L-Cys solutions were 2000 and 4500 ppm,*** was found that using L-Arg and L-Cys solutions at their CMCs,the IFT and contact angle were reduced from 34.5 to 18.0 and15.4 mN/m,and from 144°to 78°and 75°,***,the L-Arg and L-Cys solutions enabled approximately 11.9%and 8.9%additional recovery of OOIP(original oil in place).It was identified that both amino-acid surfactants can be used to improve oil recovery due to their desirable effects on the EOR mechanisms at their CMC ranges.

关键词： Chemical EOR Amino-acid surfactant IFT Wettability Coreflooding

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The Effects of Nanoparticle Additives on Thermophysical Properties of Concrete Mixtures

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Open Journal of Civil Engineering 2022年第4期12卷 587-614页

作者： Kamran Rahmati Shadbad Ali foroughi-asl Siamak Talatahari Sassan Mohasseb Faculty of Civil Engineering University of Tabriz Tabriz Iran ETH SMTEAM GmbH Meilen Switzerland

In recent years, energy-retrofitting is becoming an imperative aim for existing buildings worldwide and increased interest has focused on the development of nanoparticle blended concretes with adequate mechanical properties and durability performance, through the optimization of concrete permeability and the incorporation of the proper nanoparticle type in the concrete matrix. In order to investigate the potential use of nanocomposites as dense barriers against the permeation of liquids into the concrete, three types of nanoparticles including Zinc Oxide (ZnO), Magnesium Oxide (MgO), and composite nanoparticles were used in the present study as partial replacement of cement. Besides, the effect of adding these nanoparticles on both pore structure and mechanical strengths of the concrete at different ages was determined, and scanning electron microscopy (SEM) images were then used to illustrate the uniformity dispersion of nanoparticles in cement paste. It was demonstrated that the addition of a small number of nanoparticles effectively enhances the mechanical properties of concrete and consequently reduces the extent of the water permeation front. Finally, the behavioral models using Genetic Algorithm (GA) programming were developed to describe the time-dependent behavioral characteristics of nanoparticle blended concrete samples in various compressive and tensile stress states at different ages.

关键词： Nanoparticle Blended Concretes Zinc Oxide (ZnO) Magnesium Oxide (MgO) Composite Nanoparticles Genetic Algorithm (GA) Programming Time-Dependent Behavioral Model

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Pseudo four-component and regioselective synthesis of 4-amino-3,5-dicyano-6-arylphthalates using triethylamine catalyst

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Chinese Chemical Letters 2013年第6期24卷 497-499页

作者： Bagher Mohammadi Mansoor Shafieey hamed Kazemi Ali Ramazani Department of Chemistry Payame Noor University Departmen of Chemistry University of Zanjan

An efficient triethylamine-catalyzed synthesis of 4-amino-3,5-dicyano-6-arylphthalates is described.A one-pot,simple pseudo four-component reaction between arylaldehydes,dialkyl acetylenedicarboxylates, and twice as m... 详细信息

关键词： Multicomponent reactions Ring closure Triethylamine Catalysis Regioselective 4-Amino-3 5-dicyano-6-arylphthalates

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Prevalence of antibiotic resistance in Helicobacter pylori : A recent literature review

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World Journal of Methodology 2015年第3期5卷 164-174页

作者： Reza Ghotaslou hamed Ebrahimzadeh Leylabadlo Yalda Mohammadzadeh asl Research Center of Infectious and Tropical Diseases Tabriz University of Medical Sciences Department of Microbiology School of Medicine Tabriz University of Medical Sciences

AIM: To review previous studies(the last 6 years) about the Helicobacter pylori(H. pylori) antibiotic resistance in order to evaluate the trend in antibiotic resistance. METHODS: In this study, the Pub Med, MEDLINE, Science Direct, Google Scholar and Scielo manuscripts were reviewed from 2009 to 2014. RESULTS: On the whole rates of H. pylori antibiotic resistance were 47.22%(30.5%-75.02%) for metronidazole, 19.74%(5.46%-30.8%) for clarithromycin, 18.94%(14.19%-25.28%) for levofloxacin, and 14.67%(2%-40.87%) for amoxicillin, 11.70%(0%-50%) for tetracycline, 11.5%(0%-23%) for furazolidon and 6.75%(1%-12.45%) for rifabutin. The frequency of tetracycline, metronidazole and amoxicillin resistance was higher in Africa, while clarithromycin and levofloxacin resistance was higher in North America and Asian, respectively. CONCLUSION: The most sensitive drug is rifabutin and the lowest sensitive drug is metronidazole in the world. The worldwide H. pylori antibiotic resistance to clarithromycin and levofloxacin has increased during the last 6 years. The present systematic review show alarming results and a novel plan is needed for eradication therapy of H. pylori infections.

关键词： Antibiotic resistance Helicobacter pylori Worldwide

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