检索结果-南通市图书馆

Journal of Bionic Engineering 2020年第6期17卷 1209-1223页

作者： maryam Mohammadi Sayed Mahmood Rabiee Saeed Hesaraki Department of Materials Engineering Babol Noshirvani University of TechmologyBabol 71167-47148Iran Nanotechnologv and Advanced Materials Materials and Energy Research CenterKaraj ***AlborzIran

The effect of concurrent attendance of two inhibitors of bone degradation,namely Alendronate(Aid)sodium trihydrate and Strontium(Sr),on Calcium Phosphate Cement(CPC)characteristics was *** this aim,5 wt%Strontium and 21 mM Alendronate sodium trihydrate were used in calcium phosphate cement and setting time,ion and drug release were ***264.7 and G cell were cultured on cement samples and Tartrate-Resistant Acid Phosphatase(TRAP),Alkaline phosphatase(ALP)activity and MTT assay were *** results of structural analysis indicated that 21 mM Aid did not let the cement ***,colloidal silica was added to the cement formula and successfully decreased the setting *** vitro tests showed Sr-loaded sample had a greater inhibitory effect on biocompatibility of G cells than Aid-loaded and Sr-Ald-loaded *** addition,the findings about osteoblast MTT and ALP activity indicated that Sr was more effective in osteogenic activity of G *** simultaneous presence of Aid and Sr in Calcium Phosphate Cement(CPC)was not as effective in its biocompatibility as the presence of Sr alone.

关键词： calcium phosphate cements drug release alendronate sodium trihydrate strontium RAW264.7 cell G cell

Advanced development in upstream of petroleum industry using nanotechnology

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Engineering 2020年第6期28卷 1483-1491页

作者： Sedigheh Sadegh Hassani maryam Daraee Zahra Sobat Catalysis research Division Research Institute of Petroleum Industry(RIPI)West Entrance Blvd.Olympic VillageP.O.Box 14857-33111TehranIran Nanotechnology Research Center Research Institute of Petroleum Industry(RIPI)West Entrance Blvd.Olympic VillageP.O.Box 14857-33111TehranIran

Nowadays,energy supply is one of the most important issues due to limitation of oil,gas and coal *** of rapid population,civilization and energy consumption growth,the improved technologies to make optimal use of the sources,solving related problems and finding new energy sources are *** than 10 years ago,nanotechnology as one of the most important technologies has also been applied to progress in the oil and gas industry(upstream,midstream and downstream).The experience of these years has shown that application of nanotechnology in the oil industry improves the exploration of crude oil and natural gas(underground or deep water),drilling and bringing the crude oil or raw natural gas to the surface,as well as transportation,storage,processing and purifying *** with high specific surface area,pore volume and small size show unique physical and chemical properties,which could be applied in several *** this regard,many researchers have been focused on various nanoparticles for upstream industries and studied their potential in oil exploration,drilling,production and enhanced oil recovery(EOR).Also,in downstream and midstream which involve refining of crude oil,processing and purifying of raw natural gas,transportation and storage of crude or refined petroleum products,the nanomaterials have been used to improve the quality of oil and make it appropriate for the *** sulfur gasoline,enhancing the octane number and coating the transportation system are among the goals that have been achieved successfully using *** this work,various types of nanoparticles such as metallic,metal oxide,hybrid nanoparticles,carbon nanomaterials,nano-composites and their applications in oil upstream industry are ***,their usage in different types of oil upstream processes is discussed.

关键词： Nanotechnology Oil exploration Oil drilling Nanoparticles Enhanced oil recovery

Incorporation of 3-dimensional lycopodium with hydrophobic nature and interconnected nano-channels into polyvinylidene fluoride membranes for desalination applications by vacuum membrane distillation

在线全文

学校读者我要写书评

暂无评论

化学科学与工程前沿:英文版 2023年第9期17卷 1162-1182页

作者： Saeed Seraj Toraj Mohammadi maryam Ahmadzadeh Tofighy Center of Excellence for Membrane Research and Technology Department of ChemicalPetroleum and Gas EngineeringIran University of Science and Technology(IUST)Tehran***Iran

In the present research,for the first time,lycopodium as a novel nanofiller was incorporated into a polyvinylidene fluoride matrix to fabricate lycopodium/polyvinylidene fluoride flat-sheet membrane for desalination applications by vacuum membrane distillation *** prepared lycopodium/polyvinylidene fluoride membranes and lycopodium were characterized by field emission scanning electron microscopy,X-ray diffraction,Fourier transform infrared,energy dispersive X-ray,and mapping *** contact angle and liquid entry pressure measurements were also *** surface methodology was applied to optimize membrane structure and *** optimized lycopodium/polyvinylidene fluoride membrane exhibits superior performance compared to the neat polyvinylidene fluoride membrane in terms of flux,salt rejection,water contact angle,and *** vacuum membrane distillation experiments,using a 15000 ppm NaCl solution as a feed at 70℃,the neat polyvinylidene fluoride membrane,optimum membrane,and agglomerated membrane(with high lycopodium loading)demonstrated 3.80,25.20,and 14.83 LMH flux and 63.30%,99.99%,99.96%salt rejection,*** improvement in flux and salt rejection of the optimized membrane was related to the presence of lycopodium with hydrophobic nature and interconnected nano-channels in membrane *** was found that lycopodium,as the most hydrophobic material,effectively influences the membrane performance and structure for membrane distillation applications.

关键词： lycopodium hoprobhobicity vucuum embrane distillation desalination

Size dependent free vibration analysis of functionally graded piezoelectric micro/nano shell based on modified couple stress theory with considering thickness stretching effect

在线全文

学校读者我要写书评

暂无评论

Defence Technology（防务技术） 2021年第1期17卷 119-134页

作者： maryam Lori Dehsaraji Mohammad Arefi Abbas Loghman Department of Solid Mechanics Faculty of Mechanical EngineeringUniversity of KashanKashanIran

Higher-order shear and normal deformation theory is used in this paper to account thickness stretching effect for free vibration analysis of the cylindrical micro/nano shell subjected to an applied voltage and uniform temperature *** dependency is included in governing equations based on the modified couple stress ***’s principle is used to derive governing equations of the cylindrical micro/nano *** procedure is developed using Navier technique for simply-supported boundary *** numerical results are presented to investigate the effect of significant parameters such as some dimensionless geometric parameters,material properties,applied voltages and temperature rising on the free vibration responses.

关键词： Thickness stretching effect Shear and normal deformation theory Vibration analysis Length scale parameter Modified couple stress theory

Potassium phthalimide:An efficient and green organocatalyst for the synthesis of 4-aryl-7-(arylmethylene)-3,4,6,7-tetrahydro-1Hcyclopenta[d]pyrimidin-2(5H)-ones/thiones under solvent-free conditions

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2014年第2期25卷 313-316页

作者： Hamzeh Kiyani maryam Ghiasi School of Chemistry Damghan University

An efficient synthesis of Biginelli-type compounds using potassium phthalimide as a green, mild, and commercially available organocatalyst in a one-pot, multi-component cyclocondensation reaction of cyclopentanone, aldehydes, and urea/thiourea is reported. The present methodology is a green approach to access 4-aryl-7-（aryImethylene）-3,4,6,7-tetrahydro-1H-cyclopenta[d]pyrimidin-2（5H）-ones/thiones. It offers several merits such as simple operational procedures, no use of hazardous organic solvents, and cheap and environmentally friendly solid basic catalyst.

关键词： Organocatalyst Potassium phthalimide Biginelli reaction PyrimidinoneSolvent-free

Facile one-pot synthesis of pyrido[2,3-d]pyrimidine derivatives over ZrO_2 nanoparticles catalyst

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2012年第3期23卷 257-260页

作者： Shahrzad Abdolmohammadi maryam Afsharpour Department of Chemistry East Tehran BranchIslamic Azad UniversityPO Box 33955-163TehranIran Nano Science and Technology Research Center University of TehranTehranIran

An efficient synthesis of hexahydropyrido[2,3-d]pyrimidinetrione derivatives is achieved via tandem Knoevenagel-Michael addition of aromatic aldehydes,methylcyanoacetate and 4（6）-aminouracil in solvent-free conditions in the presence of 10 mol%of ZrO_2 nanoparticles（ZrO_2 NPs） as a heterogenous *** procedure is formed in high yields,short reaction time and an environmentally friendly specificity.

关键词： Pyrido[2 3-d]pyrimidines Solvent-free Tandem Knoevenagel-Michael addition ZrO_2 nanoparticles

A novel and efficient synthesis of alkyl thiocyanates from alkyl halides in water using phase transfer catalysts

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2011年第6期22卷 659-662页

作者： maryam Gorjizadeh Soheil Sayyahi Department of Chemistry Islamic Azad University

1,4-Bis（triphenylphosphonium）-2-butene dichloride（BTPBDC） and 1,4-bis（triphenyl phosphonium）-2-butene dithiocyanate （BTPBDT） were prepared and used as phase-transfer *** halides were converted efficiently to the corresponding alkyl thiocyanates under mild reaction conditions in *** evidence for the formation of isothiocyanates as by-product of the reaction was observed.

关键词： Alkyl thiocyanate Alkyl halide 1 4-Bis(triphenylphosphonium)-2-butene dichloride 1 4-Bis(triphenyl-phosphonium)-2-butene dithiocyanate Phase transfer catalyst

A mild,efficient and selective iodination of aromatic compounds using iodine and 1,4-bis(triphenylphosphonium)-2-butene peroxodisulfate

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2009年第12期20卷 1439-1443页

作者： Rashid Badri maryam Gorjizadeh Chemistry Department College of ScienceShahid Chamran University Chemistry Department College of ScienceShahid Chamran UniversityAhvaz 61357-4-3169 Iran

A simple and efficient method for the iodination of aromatic compounds has been achieved in the presence of iodine and 1,4- bis（triphenylphosphonium）-2-butene peroxodisulfate.

关键词： Iodoaromafic compounds Aromatic compounds Iodine 1,4-Bis(triphenylphosphonium)-2-butene peroxodisulfate

Improving the wear resistance of plasma electrolytic oxidation(PEO)coatings applied on Mg and its alloys under the addition of nano-and micro-sized additives into the electrolytes:A review

在线全文

学校读者我要写书评

暂无评论

Journal of Magnesium and Alloys 2021年第4期9卷 1167-1189页

作者： maryam Molaei Kazem Babaei Arash Fattah-alhosseini Department of Materials Engineering Bu-Ali Sina UniversityHamedan 65178-38695Iran

As an efficient surface modification approach,the plasma electrolytic oxidation(PEO)technique can boost the capability of wear protection in Mg and its alloys by applying a hard and thick ceramic *** this procedure,more efficient protection can be acquired via adding additives(in the form of particle,powder,sheet,etc.)into solutions and producing composite *** additives result in more efficient protection against wear via getting stuck in the cracks and pores of coatings and rising the thickness,hardness,and diminishing the porosity size and *** efficiency of each additive can be changed owing to its intrinsic properties like melting point,size,participation type(reactive,partly reactive,or inert)and potential of *** this review,the effects of distinct additives in nano-and micro-scale size on wear behavior of PEO coatings on Mg and its alloys is going to be reviewed.

关键词： Plasma electrolytic oxidation(PEO) Mg alloys Wear behavior Nano-sized additives Micro-sized additives

Efficient Authentication Scheme for UAV-Assisted Mobile Edge Computing

在线全文

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2023年第5期75卷 2727-2740页

作者： maryam Alhassan Abdul Raouf Khan Department of Computer Science College of Computer Science and Information TechnologyKing Faisal UniversityAlahssa31982Kingdom of Saudi Arabia

Preserving privacy is imperative in the new unmanned aerial vehicle(UAV)-assisted mobile edge computing(MEC)architecture to ensure that sensitive information is protected and kept secure throughout the ***,efficiency must be considered while developing such a privacy-preserving scheme because the devices involved in these architectures are resource *** study proposes a lightweight and efficient authentication scheme for *** proposed scheme is a hardware-based password-less authentication mechanism that is based on the fact that temporal and memory-related efficiency can be significantly improved while maintaining the data security by adopting a hardwarebased solution with a simple *** proposed scheme works in four stages:system initialization,EU registration,EU authentication,and session *** is implemented as a single hardware chip comprising registers and XOR gates,and it can run the entire process in one clock ***,the proposed scheme has significantly higher efficiency in terms of runtime and memory consumption compared to other prevalent methods in the *** are conducted to evaluate the proposed authentication *** results show that the scheme has an average execution time of 0.986 ms and consumes average memory of 34 *** hardware execution time is approximately 0.39 ns,which is a significantly less than the prevalent schemes,whose execution times range in ***,the security of the proposed scheme is examined,and it is resistant to brute-force *** 1.158×10^(77) trials are required to overcome the system’s security,which is not feasible using fastest available processors.

关键词： MEC UAVs drones security efficiency authentication hardware-based solution password-less authentication