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Experimental investigation of shock-buffet criteria on a pitching airfoil

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Chinese Journal of Aeronautics 2022年第7期35卷 179-191页

作者： Mehran MASDARI Aghil ZEINALZADEH mohammad Ali abdi mohammad reza SOLTANI Faculty of New Sciences and Technologies University of TehranTehran ***Iran Department of Aerospace Engineering Sharif University of TechnologyTehran 11365-11155Iran Department of Aeronautical and Astronomical Engineering University of WashingtonSeattleWAUSA

An experimental investigation of the shock-buffet phenomenon subject to unsteady pitching supercritical airfoil around its quarter chord has been conducted in a transonic wind *** model was equipped with pressure taps connected to the fast response *** were conducted at different free-stream Mach number from 0.61 *** principle goal of this investigation was to experimentally discuss the shock-buffet criterion over a SC(2)-0410 supercritical pitching related to the hysteresis loops of total drag and trailing edge pressure,the behaviour of the shock wave foot location,the pressure distribution over the upper surface,and by implementing the wavelet analysis of the normal *** ensure capturing the buffet phenomenon by utilizing these criteria,a pressure port has been drilled exactly at the trailing edge of the airfoil where its output was used to detect the buffet phenomenon for different *** representation of the flow using the shadow graph flow visualization technique for different test cases is further used to illustrate the unsteady shock wave motion.A comparative analysis of experimental measurements shows that the conducted criteria confirm each other when the buffet phenomenon occurs at the position of the oscillating cycle.

关键词： Airfoil Buffeting Experimental analysis Hysteresis loops Pitching motion Shock wave Wavelet analysis

Relationship between Temperaments of Medicinal Plants and Their Major Chemical Compounds

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Journal of Traditional Chinese Medicine 2011年第1期31卷 27-31页

作者： mohammad reza Shams Ardekani Roja Rahimi Behjat Javadi Leila abdi Mahnaz Khanavi Department of Traditional Pharmacy Faculty of Traditional Iranian Medicine Tehran University of Medical Sciences Department of Pharmacognosy Faculty of Pharmacy Tehran University of Medical Sciences

Objective: To determine any relationship between temperaments of medicinal plants referred to traditional Iranian manuscripts and their major chemical compounds. Methods: Plants used in traditional Iranian medicine were categorized based on their major chemical compounds including alkaloids, phenolic compounds, and essential oils. Their temperaments were extracted from traditional herbal pharmacopeias of Iran. The possible relationship between major chemical compounds and temperaments of each group were evaluated. Results: Plants containing phenolic compounds as their major constituents are hot and dry temperaments except those contain tannins with cold and dry temperaments. Plants containing essential oils have hot and dry temperaments except those whose major essential oils with alcoholic structure which have cold and dry temperaments. Alkaloid-containing plants have cold and dry or hot and dry temperaments based on their alkaloidal structures. Conclusions: There is a close relationship between major chemical compounds of medicinal plants and their temperaments mentioned in traditional Iranian manuscripts.

关键词： traditional Iranian medicine " temperament " alkaloids " phenolic compounds " volatile oils

Impacts of oak deforestation and rainfed cultivation on soil redistribution processes across hillslopes using ^(137)Cs techniques

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Forest Ecosystems 2021年第3期8卷 425-438页

作者： Shamsollah Ayoubi Nafiseh Sadeghi Farideh Abbaszadeh Afshar mohammad reza abdi Mojtaba Zeraatpisheh Jesus Rodrigo-Comino Department of Soil Science College of AgricultureIsfahan University of TechnologyIsfahan 84156-83111Iran Department of Soil Science College of AgricultureUniversity of JiroftKermanIran Department of Physics Faculty of ScienceUniversity of IsfahanIsfahan 81747-73441Iran Henan Key Laboratory of Earth System Observation and Modeling Henan UniversityKaifeng 475004China College of Environment and Planning Henan UniversityKaifeng 475004China Department of Physical Geography University of TrierTrierGermany Soil Erosion and Degradation Research Group Department of GeographyUniversitat de ValènciaValenciaSpain

Background:As one of the main components of land-use change,deforestation is considered the greatest threat to global environmental diversity with possible irreversible environmental ***,one example could be the impacts of land-use changes from oak forests into agricultural ecosystems,which may have detrimental impacts on soil mobilization across ***,to date,scarce studies are assessing these impacts at different slope positions and soil depths,shedding light on key geomorphological ***:In this research,the Caesium-137(^(137)Cs)technique was applied to evaluate soil redistribution and soil erosion rates due to the effects of these above-mentioned land-use *** achieve this goal,we select a representative area in the Lordegan district,central Iran.^(137)Cs depth distribution profiles were established in four different hillslope positions after converting natural oak forests to rainfed *** each hillslope,soil samples from three depths(0–10,10–20,and 20–50 cm)and in four different slope positions(summit,shoulder,backslope,and footslope)were taken in three transects of about 20m away from each *** activity of ^(137)Cs was determined in all the soil samples(72 soil samples)by a gamma *** addition,some physicochemical properties and the magnetic susceptibility(MS)of soil samples were ***:Erosion rates reached 51.1 t·ha^(−1)·yr^(−1) in rainfed farming,whereas in the natural forest,the erosion rate was 9.3 t·ha^(−1)·yr^(−1).Magnetic susceptibility was considerably lower in the cultivated land(χhf=43.5×10^(−8)m^(3)·kg^(−1))than in the natural forest(χhf=55.1×10^(−8)m^(3)·kg^(−1)).The lower soil erosion rate in the natural forest land indicated significantly higher MS in all landform positions except at the summit one,compared to that in the rainfed farming *** shoulder and summit positions were the most erodible hillslope positions in the natural forest and rainfed farming,res

关键词： Land-use change Soil redistribution Topographical changes Radionuclide Rainfed farming Deforestation

Seismic control of multi-degrees-of-freedom structures by vertical mass isolation method using MR dampers

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Earthquake Engineering and Engineering Vibration 2024年第2期23卷 503-510页

作者： Mohamad Shahrokh abdi Masoud Nekooei mohammad-Ali Jafari Department of Civil Engineering Marivan BranchIslamic Azad UniversityMarivan ***Iran Department of Civil Engineering Science and Research BranchIslamic Azad UniversityTehran ***Iran Structural Department of Transmission and Distribution Research Center Niroo Research Institute(NRI)Tehran ***Iran

Vertical mass isolation(VMI)is one of the novel methods for the seismic control of *** this method,the entire structure is assumed to consist of two mass and stiffness subsystems,and an isolated layer is located among *** this study,the magnetorheological damper in three modes:passive-off,passive-on,and semi-active mode with variable voltage between zero and 9 volts was used as an isolated layer between two ***-degrees-of-freedom structures with 5,10,and 15 floors in two dimensions were examined under 11 pairs of near field *** each level,the displacement of MR dampers was taken into *** responses of maximum displacement,maximum inter-story drift,and maximum base shear in controlled and uncontrolled buildings were compared to assess the suggested approach for seismic control of the *** to the results,the semi-active control method can reduce the response by more than 12%compared to the uncontrolled mode in terms of maximum displacement of the mass subsystem of the *** method can reduce more than 16%and 20%of the responses compared to the uncontrolled mode in terms of maximum inter-story drift and base shear of the structure,respectively.

关键词： seismic control vertical mass isolation base shear magnetorheological damper semi-active control

Evaluation of rabbit antibody response against 8 and 16 kDa recombinant subunits of antigen B from Echinococcus granulosus

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Asian Pacific Journal of Tropical Medicine 2012年第5期5卷 355-357页

作者： Jahangir abdi Bahram Kazemi mohammad Hasan Karimfar mohammad Bagher Rokni Department of Medical Parasitology and Mycology School of ParamedicineIlam University of Medical SciencesHornIran Cellular and Molecular Biology Research Centre Shahid Reheshti University(Medical Campus)Tehran.Iran Department of Medical Parasitology and Mycology School of ParamedicineIlam University of Medical SciencesIlam.Iran Department of Medical Parasitology and Mycology School of Public HealthTehran University of Medical SciencesTehranIran

Objective:To immunize rabbits with 12 and 16 kDa recombinant subunits of antigen B from Echinococcus granulosus(***) and measuring polyclonal antibody and humoral immune response using ELISA and gel ***:Two mentioned antigens were cloned and expressed in expression vector and purified by affinity *** young rabbits were selected and challenged intradermallt with yielded recombinant ***’ sera were collected post infection and were tested using ELISA and gel diffusion for polyclonal antibody detection 10 days after last ***:The specific antibody against the recombinant peptides was efficiently produced within 4 weeks post ***: Produced recombinants proteins could induce the immune response of the rabbits successfully. This process might improve the clarification of diagnosis and vaccination as regards hydatidosis.

关键词： Cystic echinococcosis Hydatidosis Polyclonal antibody

Evaluation of wear and corrosion resistance of pure Mg wire produced by friction stir extrusion

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Transactions of Nonferrous Metals Society of China 2015年第6期25卷 1847-1855页

作者： mohammad SHARIFZADEH mohammad ali ANSARI Morteza NARVAN reza abdi BEHNAGH Alireza ARAEE mohammad Kazem BESHARATI GIVI School of Mechanical Engineering College of EngineeringUniversity of Tehran Faculty of Mechanical engineering Urmia University of Technology

A solid-state process--friction stir extrusion （FSE） was applied to produce wires from Mg chips. The FSE process was performed using tool rotational speed of 150, 250 and 355 r/min at a constant plunge rate of 20 mm/min. The microstructural evolution, tribological behavior and corrosion resistance of the reference specimen and the friction stir extruded specimens were investigated. Microstructural characteristics of the specimens were investigated by optical microscopy （OM） and scanning electron microscopy （SEM）. The evaluations of mechanical properties include microhardness and dry sliding wear test. The corrosion resistance of the extruded specimens was characterized by potentiodynamic polarization test. The results show that the extruded specimens possess good surface quality and the process is beneficial for the improvement of hardness and wear resistance of the first machined chips. The produced wires are also found to have adequate corrosion resistance. These results demonstrate that FSE is an effective strategy for converting the machined Mg chips into the usable wires.

关键词： friction stir extrusion Mg wire friction wear hardness corrosion

INAA to Determine Trace Element Concentrations in the Hair of Street Children of Isfahan City, Iran

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World Journal of Nuclear Science and Technology 2013年第4期3卷 117-122页

作者： Khadijeh rezaee Ebrahim Saraee mohammad reza abdi mohammad Mehdi Gharipour Nayereh Soltani Department of Nuclear Engineering Faculty of Advance Sciences and Technologies University of Isfahan Isfahan Iran Department of Physics Faculty of Science University of Isfahan Isfahan Iran Departments of Physics Universiti Putra Malaysia UPM Serdang Selangor Malaysia Safahan Institute of Higher Education Isfahan Iran

This study aimed to assess trace element concentrations in the hair of street children. Nutritional status was assessed by 24 hours’ dietary recall and anthropometric measurements. Data analysis found that Br, Sc, Sm and Ti concentrations show a normal distribution, and there is no significant difference between street children and control group. However, in the street children’s hair, the levels of Au, U, V are decreased and the levels of Co, La, Sb, Th are increased compared to the control group.

关键词： Hair INAA Isfahan Street Children Trace Elements

Exogenous Endophthalmitis Due to Illicit Drug Injection in an I.V. Drug User

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Open Journal of Ophthalmology 2015年第4期5卷 155-157页

作者： Seyed Ali Tabatabaei mohammad Soleimani mohammad reza Mansouri mohammad Ebrahimi Parisa abdi mohammad Riazi Esfahani Eye Research Center Farabi Eye Hospital Tehran University of Medical Sciences Iran

Background: Drug abuse could cause complications;infection and overdose are the most prevalent of them. Unreliable history of addicted patients also makes the diagnosis difficult and leads to delayed treatment and poor prognosis. Early recognition and prompt treatment are required to minimize the destructive damage. To our knowledge, there is not any previous report of bilateral eye injection among drug abusers, causing traumatic endophthalmitis in the English literature and our report helps ophthalmologists to think about rare sources of endophthalmitis. Aim: The aim is to emphasize the importance of considering exogenous endophthalmitis in I.V. drug users who abuse drugs. Methods: A 40-year-old I.V. drug user man was referred complaining a history of the pain, redness and impaired vision of both eyes from three days ago. Perilimbal injection and anterior chamber cellular reaction were present in both eyes. Both corneas were hazy;corneal edema, abscess, sealed corneal lacerations and dull red reflex were visible in both eyes. Results: After an ultrasonography based on the suspicion of endophthalmitis, anterior chamber and vitreous aspiration and intravitreal injection of vancomycin 1 mg and ceftazidime 2.25 mg were performed. The right eye rapidly deteriorated and was eviscerated two days later and the left eye had a good response to medications. Conclusion: This report illustrates that the orbit can be a potential site of drug injection and endophthalmitis should be considered in individuals who abuse drugs.

关键词： Endophthalmitis IV Drug User Addiction Trauma

Design,synthesis and pharmacological evaluation of 4-[2-alkylthio-5(4)-(4-substitutedphenyl)imidazole-4(5)yl]benzenesulfonamides as selective COX-2 inhibitors

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Acta Pharmacologica Sinica 2007年第8期28卷 1254-1260页

作者： Mona SALIMI mohammad Hossein GHAHREMANI Nima NADERI Mohsen AMINI Elika SALIMI Massoud AMANLOU Khosrou abdi Raha SALEHI Abbas SHAFIEE Research and Development Center Pasteur Institute of IranKasasIran Department of Pharmacology and Toxicology Faculty of Pharmacy and Pharmaceutical Sciences Research CenterTehran University of Medical SciencesTehranIran Neuroscience Research Center Shahid Beheshti University of Medical SciencesTehranIran Department of Medicinal Chemistry Faculty of Pharmacy and Pharmaceutical Sciences Research CenterTehran University of Medical SciencesTehranIran Department of Pharmacology Faculty of PharmacyMazanderan University of Medical SciencesSariIran

Aim:To design and synthesize a series of benzenesulfonamide derivatives,4-[2-alkylthio-5（4）-（4-substitutedphenyl）imidazole-4（5）-yl]benzenesulfonamides（4a-4j）,which are intended to act as cyclooxygenase-2（COX-2）inhibitors with goodCOX-2 inhibitor activity,and which will exert anti-inflammatory activities in ***:Benzenesulfonamide derivatives were designed and synthesized throughmulti-step chemical *** the synthesized compounds were evaluated inan in vitro *** active compound 4a-af was selected for further evaluationin a carrageenan-induced rat paw edema ***:Docking studies showedthat compound 4 bind into the primary binding site of COX-2 with the sulfonamideSO2NH2moiety interacting with the secondary pocket amino acid *** thein vitro assay,compound 4 inhibited COX-2 with an inhibition concentration IC50value of 1.23-8 nmol/L,compared to celecoxib with IC50 value of 1.5 nmol/***-pound 4b and 4c had good potency and selectivity in comparison to the *** the in vivo model,compound 4a-4f exhibited a moderate potency to inhibit 50%carrageenan-induced paw edema with value of 1.58-4.3 mg/*** the latterexperiment,compound 4c was the most active ***:The anti-inflammatory effects obtained for compound 4a-4j could be due to the presenceof fluorine or hydrogen substituents in the para position of the phenyl ring ofthese compounds.

关键词： cyclooxygenase-2 inhibitor imidazole alkylthio celecoxib