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Fabrication and Characterization of Willemite Scaffolds Using Corn Stalk as a Novel Bio Template for Bone Tissue Engineering Applications

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Journal of Bionic Engineering 2023年第1期20卷 16-29页

作者： zahra Yahay Seyed Mehdi Mirhadi Fariborz Tavangarian Department of Cellular Biotechnology Cell Science Research CenterRoyan Institute for BiotechnologyACECRIsfahan81593-58686Iran Department of Materials Engineering Shahreza BranchIslamic Azad UniversityShahrezaIsfahan86145-311Iran Mechanical Engineering Program School of ScienceEngineering and TechnologyPennsylvania State UniversityHarrisburgMiddletownPA17057USA

In this paper,we used Corn Stalk(CS)as a renewable and economical bio template to fabricate willemite scaffolds with the potential application in skull bone *** was used as a sacrificial template to synthesize the *** scaffolds with the chemical formula of Zn2SiO4 and pore size in the range of 3 to 10µm could be successfully synthesized by soaking CS in the willemite solution for 24 h and sintering at 950°C for 5 *** porosity of the samples was controlled by the soaking time(between 12 and 48 h)in the willemite solution from 5 to 35%,*** properties of these scaffolds showed a good approximation with cranial bone *** addition,cytotoxicity assays(MTT)were performed on Human Bone Marrow Stromal cells(HBMSc)and A172 human glioblastoma cell lines by direct and indirect culture methods to estimate their toxicity for bone and nerve cells,*** Phosphatase(ALP)activity and DAPI/Phalloidin cell staining were also performed to investigate the efficiency of the scaffolds for bone tissue engineering *** results showed that the scaffolds had good biocompatibility with both HBMSC and A172 cells,noticeable improvement on ALP activity,and great apatite formation ability in Simulated Body Fluid(SBF).All the evidence ascertained that willemite scaffolds made by corn stalks could be a useful candidate for bone tissue engineering applications.

关键词： Corn stalk Bio template Bioactive ceramics-Scaffolds Bone tissue engineering

Synthesis of nanocrystalline γ-Al_2O_3 by sol-gel and precipitation methods for methanol dehydration to dimethyl ether

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Journal of Natural Gas Chemistry 2011年第2期20卷 128-134页

作者： zahra Hosseini Majid Taghizadeh Fereydoon Yaripour Chemical Engineering Department Babol University of Technology Catalyst Research Group Petrochemical Research and Technology Company NPC

The capability of sol-gel and conventional precipitation techniques for the synthesis of nanocrystalline γ-alumina was investigated. These catalysts were used for vapor-phase dehydration of methanol to dimethyl ether in a fixed-bed reactor under the same operating conditions （T = 300 ？C, P = 1 bar, LHSV = 2.8, 11.7, 26.1 h？1） and characterized by means of N2 adsorption-desorption, NH3-TPD, XRD, TGA and SEM techniques. According to the experimental results, the catalysts prepared using sol-gel method in non-aqueous medium showed better performance compared with those prepared by other methods.

关键词： γ-Al2O3 sol-gel precipitation methanol dehydration dimethyl ether

Development and assessment of algorithms for DEM-LES simulations of fluidized bed

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Particuology 2023年第12期83卷 241-257页

作者： Fatima Ez-zahra El Hamra Radouan Boukharfane UM6P College of Computing Mohammed Ⅵ Polytechnic University(UM6P)BenguerirMorocco

The use of high-fidelity Discrete Element Method(DEM)coupled with Computational Fluid Dynamics(CFD)for particle-scale simulations demands extensive simulation times and restricts application to small particulate ***-CFD simulations require good performance and satisfactory scalability on high-performance computing platforms.A reliable parallel computing strategy must be developed to calculate the collision forces,since collisions can occur between particles that are not on the same processor,or even across processors whose domains are *** present paper describes a parallelization technique and a numerical verification study based on a number of tests that allow for the assessment of the numerical performance of DEM used in conjunction with Large-Eddy Simulation(LES)to model dense flows in fluidized *** fluid phase is computed through solving the volume-averaged four-way coupling Navier-Stokes equations,in which the Smagorinsky sub-grid scale tensor model is ***,the performance of Sub-Grid Scale(SGS)turbulence models applied to Fluidized Bed Reactor(FBR)configurations has been assessed and *** developed numerical solver represents an interesting combination of techniques that work well for the present purpose of studying particle formation in fluidized beds.

关键词： DEM-LES Fluidized bed Computational efficiency Numerical accuracy

Advanced development in upstream of petroleum industry using nanotechnology

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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

Determination of Chilling and Heat Requirements of Pistachio (Pistacia vera L.) Cultivars

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Agricultural Sciences in China 2009年第7期8卷 803-807页

作者： Majid Rahemi zahra Pakkish Department of Horticultural Science Shiraz University Department of Horticultural Science Shahid Bahonar University

Determination of chilling and heat requirements of pistachio （Pistacia vera L.） cultivars is important for satisfactory growth and development, particularly when large-scale commercial production is desired. This experiment was conducted to determine chilling requirement inducing vegetative and flower buds of Kalle-Ghuchi, Owhadi, Ahmad-Ahgaei, and Akbari pistachio. Shoots with enough vegetative and flower buds were taken from pistachio trees during autumn 2007 and 2008 when temperature reached to 15°C. Cuttings with flower buds were kept under （5 ± 1）°C for 0, 600, 650, 700, 750, 800, 850, 900, 950, 1 000, 1 050, 1 100, 1 150, 1 200, 1 250, and 1 300 h, respectively, and cuttings with vegetative buds were kept at 51°C until 1 500 h. The results indicated that pistachio cultivars requite chilling time between 750-1 400 h and heat requirements between 8 852-15 420 growing degree hours （GDH）. Consequently, Kalle-Ghuchi had the lowest chilling （750-950 h）, and heat （8 852-9 768 GDH） requirements, Ahmad-Aghaei and Owhadi had intermediate （1 000-1 250 h, 10 656- 13 320 GDH） and Akbari had the highest chilling （1 200-1 400 h） and heat （11 863-15 420 GDH） requirement.

关键词： chilling requirement heat requirement pistachio

Selective oxidation of alcohols with H2O2 catalyzed by zinc polyoxometalate immobilized on multi-wall carbon nanotubes modified with ionic liquid

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Chinese Chemical Letters 2017年第5期28卷 971-975页

作者： Robabeh Hajian zahra Alghour Department of Chemistry Yazd UniversityYazd 89195-741lran

In this work,acid functionalized multi-wall carbon nanotubes（MWCNTs） were modified with imidazolium-based ionic *** selective oxidation of various alcohols with hydrogen peroxide catalyzed by [PZnMo2W9O39]^5-,ZnPOM,supported on ionic liquids-modified with MWCNTs,MWCNTAPIB,is *** catalyst[ZnPOM@APIB-MWCNT],was characterized by X-ray diffraction,scanning electron microscopy（SEM） and FT-IR spectroscopic *** heterogeneous catalyst exhibited high stability and reusability in the oxidation reaction without loss of its catalytic performance.

关键词： Immobilized ionic liquid [PZnMo2W9O39]^5- Hydrogen peroxide Oxidation Alcohol Heterogeneous catalyst

Removal of Ni and Cd Ions from Aqueous Solution Using Iron Dust-zeolite Composite： Analysis by Thermodynamic, Kinetic and Isotherm Studies

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Chemical Research in Chinese Universities 2017年第2期33卷 318-326页

作者： zahra AHALI ABADEH Mehdi IRANNAJAD Department of Mining and Metallurgical Eng. Amirkabir University of Technology Tehran *** Iran

To examine the effectiveness of iron dust-zeolite composite as an adsorbent for the removal of heavymetal ions from aqueous solutions, the adsorption isotherms, the kinetic, thermodynamic and optimum conditions,such as initial concentration, pH, contact time, adsorbent dosage and competitive adsorption conditions of heavymetals were investigated. The characterization of the composite was characterized via FTIR, SEM, XRF and XRDmethods. Kinetic results on the removal of heavy metal ions from aqueous solutions have been well described by thepseudo-second-order model. The adsorption data for Cd and Ni ions were fitted well with the Langmuir and Fretm-dlich isotherm models, respectively. The maximum adsorption capacities of iron dust-zeolite for Cd and Ni ions wereequal to 78.125 and 76.33 mg/g, respectively. The thermodynamic parameters such as enthalpy, entropy and freeenergy of adsorption of metal ions were determined. It was found that the process is endothermic, favorable andspontaneous. The competitive adsorption ability of heavy metal ions in the binary system on the composite showedthat Cd ions had a synergistic effect on the adsorotion of Ni and Ni ions had the negative effect on Cd adsorption.

关键词： Adsorption Zeolite Iron dust Heavy metal Competitive adsorption

Erratum to:Cadmium nanoclusters in a protein matrix:Synthesis,characterization,and application in targeted drug delivery and cellular imaging

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Nano Research 2024年第6期17卷 5755-5755页

作者： Morteza Sarparast Abolhassan Noori Hoda Ilkhani S.zahra Bathaie Maher F.El-Kady Lisa J.Wang Huong Pham Kristofer L.Marsh Richard B.Kaner Mir F.Mousavi Department of Chemistry Tarbiat Modares UniversityTehran 14115-175Iran Department of Clinical Biochemistry Faculty of Medical SciencesTarbiat Modares UniversityTehran 14115-111Iran Department of Chemistry and Biochemistry University of CaliforniaLos AngelesLos AngelesCA 90095USA Department of Chemistry Faculty of ScienceCairo UniversityGiza 12613Egypt California NanoSystems Institute University of CaliforniaLos AngelesLos AngelesCA 90095USA

The Electronic Supplementary Material available online erroneously only contains the first six pages of the entire supplementary material *** will find the entire supplementary material file online linked to this publisher’s *** publisher apologizes to the authors and readers for this *** Supplementary Material:Supplementary material(detailed description on procedures,and further characterizations,including synthesis,optimization,and characterization of CdNCs,HA-CdNCs,and DOX-HA-CdNCs;calculating quantum yield;a Jellium model for assigning the most valid number of the atoms in the NCs;drug loading and release;cellular uptake and cytotoxicity)is available in the online version of this article at https://***/10.1007/s12274-016-1201-z.

关键词： characterization matrix calculating

Non-thermal plasma modified growth and differentiation process of Capsicum annuum PP805 Godiva in in vitro conditions

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Plasma Science and Technology 2017年第5期19卷 43-48页

作者： Nasrin SAFARI Alireza IRANBAKHSH zahra ORAGHI ARDEBILI Department of Biology Science and Research Branch Islamic Azad University Tehran Iran Department of Biology Garmsar Branch Islamic Azad University Garmsar Iran Author to whom any correspondence should be addressed.

With the aim of evaluating the possible impacts of cold plasma on the structure and growth pattern of Capsicum annuum, the current study was carried out. The seeds were exposed to an argon-derived plasma（0.84 W cm^（-2） surface power densities） for 0, 1 or 2 minutes. Plasmatreated seeds were grown in the Murashige and Skoog（MS） medium or MS medium supplemented with BA and IAA. The presence of purple stems was recorded in plasma-treated plants grown in the medium supplemented with hormones. The recorded morphological differences were dependent on the exposure time of plasma treatments and/or the presence of hormones in the culture media. Plasma treatment of 1 minute had an improving effect on the shoot and root lengths as well as total leaf area, whereas plasma treatment of 2 minutes had an adverse effect. In contrast to the 1 minute treatment, plasma treatment of 2 minutes significantly impaired growth and hence reduced the total biomass. Alterations in stem diameter and differences in tissue patterns（especially in the vascular system） occurred, and were mainly dependent on the plasma exposure time and/or the presence of hormones. This is a first report on the effects of cold plasma on plant growth in in vitro conditions.

关键词： applied physics cold plasma differentiation nitric oxide growth