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MRI tracking of human Wharton’s jelly stem cells seeded onto acellular dermal matrix labeled with superparamagnetic iron oxide nanoparticles in burn wounds

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Burns & Trauma 2022年第1期10卷 129-141页

作者： Davood Mehrabani Mehra Nazempour Rouhollah Mehdinavaz-Aghdam Seyedeh-Sara Hashemi Reza Jalli Mahdi Saeedi Moghadam Shahrokh Zare Iman Jamhiri Javad Moayedi feridoun karimi-busheri Stem Cell Technology Research Center Shiraz University of Medical SciencesShirazFars T6G 2E171348-14336Iran Burn and Wound Healing Research Center Shiraz University of Medical SciencesShirazFars 71987-74731Iran Comparative and Experimental Medicine Center Shiraz University of Medical SciencesShirazFars 71348-14336Iran Li Ka Shing Center for Health Research and Innovation University of AlbertaEdmontonAlbertaCanada Department of Biomedical and Tissue Engineering Science and Research BranchIslamic Azad UniversityTehranIran School of Metallurgy and Materials Engineering College of EngineeringUniversity of TehranTehran ***Iran Medical Imaging Research Center Department of RadiologyShiraz University of Medical SciencesShirazFars 71348-14336Iran Department of Biochemistry School of Biotechnology and AgricultureShiraz BranchIslamic Azad UniversityShirazFars 71987-74731Iran Department of Oncology Faculty of MedicineUniversity of AlbertaEdmontonAlbertaT6G 1Z2Canada

Background:In vivo cell tracking after transplantation in regenerative medicine remains an unmet challenge and limits current understanding of the wound healing mechanism through cell-based *** study investigated tracking of human Wharton’s jelly stem cells(hWJSCs)seeded onto an acellular dermal matrix(ADM)and labeled with superparamagnetic iron oxide nanoparti-cles(SPIONs)by magnetic resonance imaging(MRI)in burn ***:The hWJSCs were characterized and assessed for growth kinetics.A total of 30 rats were enrolled in three equal *** 1 underwent scald burn injury left without treatment,the group 2 was treated by an ADM that was prepared from cosmetic surgery skin samples and the group 3 received hWJSCs labeled with SPIONs seeded onto an *** strength was evaluated before and after interventions,real time PCR assessed apoptosis,and Prussian blue staining,scanning electron microscopy(SEM)and MRI were used for the tracking of labeled ***:The hWJSCs exhibited mesenchymal stem cell *** doubling time was 40.1 *** did not show any toxic *** hWJSCs seeded onto an ADM decreased Bax and increased Bcl-2 gene *** of SPIONs within hWJSCs was confirmed by Prussian blue staining,SEM and MRI until day *** was a significant difference between the Young’s moduli of normal skin and the group receiving hWJSCs seeded onto an *** observations and SEM imaging confirmed that MRI is an accurate method to track SPION-labeled hWJSCs in ***:This study showed that SPION labeling coupled with MRI can be used to further understand the fate of stem cells after transplantation in a burn model.

关键词： Wharton’s jelly stem cells Superparamagnetic iron oxide nanoparticles Acellular dermal matrix Magnetic resonance imaging Healing Burn

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Computational Study of Electromagnetic Fields,Eddy Currents and Induction Heating in Thin and Thick Workpieces

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Communications in Computational Physics 2010年第6期8卷 211-225页

作者： Mohammad Hossein Tavakoli Hossein Karbaschi feridoun Samavat Physics Department Bu-Ali Sina UniversityHamedan 65174Iran

A set of 2D steady state finite element numerical simulations of electromagnetic fields,eddy currents distribution and induction heating pattern has been done for different thicknesses of a metal *** between the calculation results show the importance of workpiece thickness on induction heating process including electromagnetic field distribution,eddy currents pattern,heating structure and coil efficiency.

关键词： Computer simulation finite element analysis modeling induction heating metals

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The Study of the Symmetry in the Surface Structure of a Quasicrystal Al-Pd-Mn

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Advances in Materials Physics and Chemistry 2012年第2期2卷 82-84页

作者： Samavat feridoun Hadidchi Sanaz Tavakoli Mohammad Hossein Department of Physics Bu-Ali Sina University Hamedan Iran

In this paper, we are going to study the surface structure and existing symmetry by simulation of a quasicrystal Al-Pd- Mn. Quasicrystals have unique properties in their own structure. In the surface structure generally we should pay attention to two subjects. Firstly, what kind of atoms have situated on the surface and secondly the form of collecting atoms by each other sides. Usually, there are different ways for answer to these questions. In this study, Low Energy Ion Scattering (LEIS) technique has been applied. We select a representative cell by using gained information from Low Energy Electron Diffraction (LEED) technique, and give the information to the SABRE computer program. This computer program has been run for azimuthally angles 0 - 180 degrees in the intervals of 9 degree and its output has been analyzed for gaining azimuthally scan. The azimuthally scan shows the existing of a symmetry 72 degree on the surface of this quasicrystal.

关键词： Low Energy Ion Scattering (LEIS) SABRE Computer Program Azimuthally Scan Quasicrystal Al-Pd-Mn

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Characterization and Structural Property of Indium Tin Oxide Thin Films

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Advances in Materials Physics and Chemistry 2017年第2期7卷 42-57页

作者： Ehsan Parsianpour Davood Raoufi Mojtaba Roostaei Bahram Sohrabi feridoun Samavat Physics Department Bu-Ali Sina University Hamedan Iran

In this study, Indium Tin Oxide (ITO) thin films were deposited by electron beam evaporation on white glass substrates with thicknesses of about 50, 100 and 170 nm. We investigated structural properties by X-ray Diffraction (XRD) and X-ray reflectivity (XRR). The results showed that ITO thin films have a crystalline structure with a domain that increases in size with increasing thickness. For uniform electron density, as the thin film roughness increases, reflectivity curve slope also increases. Also thinner film has more fringes than thicker film. The roughness determines how quickly the reflected signal decays. XRR technique is more suitable for very thin films, approximately 20 nm and less.

关键词： ITO Thin Film X-Ray Reflectivity

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Growth of KCl<sub>1–x</sub>Br<sub>x </sub>Mixed Crystals with Different Composition Percent and Study of KBr Concentration Effect on Optical Characteristics of Mixed Crystals

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Advances in Materials Physics and Chemistry 2012年第2期2卷 85-89页

作者： feridoun Samavat Ebrahim Haji-Ali Sajad Shahmaleki Somayeh Solgi Physics Department Bu-Ali Sina University Hamedan Iran Physics Department Imam Hossein University Tehran Iran

In the present research, mixed crystals KCl1–xBrx (x = 0.1, 0.3, 0.5, 0.7 & 0.9) were grown by Czochralski method. Then some analysis such as chemical etching, XRD, and absorbing spectrum were established on the irradiated crystals by γ-ray. The results of this research show that configuration of defects in mixed crystals in contrast with pure crystals is different. Somehow that type and percentage of cumulative composition cause to changing in lattice parameter and lattice defect density in alkali halide crystals and finally change optical properties of crystal.

关键词： Alkali Halide Crystal Growth Czochralski Seed Mixed Crystal Etching Color Center Lattice Defect X-Ray Diffraction Absorbing Spectrum

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Quasicrystals

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Open Journal of Physical Chemistry 2012年第1期2卷 7-14页

作者： feridoun Samavat Mohammad Hossein Tavakoli Safdar Habibi Babak Jaleh Parisa Taravati Ahmad Department of Physics Bu-Ali Sina University Hamedan Iran

Quasicrystals are material with perfect long-range order, but with no three-dimensional translation periodicity. They are typically binary and ternary metallic alloys. Quasicrystals have characteristic physical properties. Some resemble those of periodic crystals while others have similar properties to amorphous alloys. Many of their mechanical physical prop- erties are quite unusual by the standards of common metals. The peculiar physical properties of quasicrystals certainly give rise to the hope that they may become of some practical importance in the future. Some of these properties are surface related. This provides the main motivation for surface scientists to study this material. In this paper;quasicrystals, types of them, physical properties, surface science and potential applications of them have been discussed.

关键词： Quasicrstals Icosahedral Quasicrystals Polygonal Quasicrystals Aperiodic Intermetallics

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KCl Single Crystals Growth with Mn, Ag and In Impurities by Czochralski Method and Study of Impurities Influence on Their Properties

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Open Journal of Physical Chemistry 2012年第3期2卷 185-188页

作者： feridoun Samavat Ebrahim Haji Ali Somayeh Solgi P. Taravati Ahmad Physics Department Bu-Ali Sina University Hamedan Iran Physics Department Imam Hossein University Tehran Iran

In this research KCl, KCl:Mn, KCl:Ag and KCl:In single crystals have been grown by Czochralski method. X-ray diffraction confirms KCl single crystal formation. In this work also influence of mentioned impurities on the optical property of KCl single crystal has been studied by chemical etching. Then the hardness of these crystals have been measured by Vickers micro hardness. The result indicate the positive effect of the impurity on optical and mechanical properties.

关键词： Single Crystal KCl Czochralski X-Ray Diffraction Chemical Etching Vickers Micro Hardnes

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Effect of Annealing Temperature on the Optical Properties of Palladium Thin Film

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Open Journal of Physical Chemistry 2012年第2期2卷 103-106页

作者： feridoun Samavat Farzane Mahmoodi Parisa Taravati Ahmad Mohammad Faraz Samavat Mohammad Hossein Tavakoli Sanaz Hadidchi Department of Physics Bu-Ali Sina University Hamedan Iran

In this paper, the effect of annealing temperature on the optical properties of palladium thin films has been investigated. The Pd thin films with thickness of about 123 ? were deposited on glass substrates by electron beam coating method. Then the palladium thin films were annealed in air at 350℃, 450℃, 550℃ and 650℃ for 1h and then cold slowly. All the initial Pd films were found to have amorphous structure. Their optical properties were studied as function of annealing temperature using Ultraviolet-Visible (UV-Vis) spectroscopy. The direct band gaps in Pd films have been de- termined. Decreasing the values of the direct band gap shows also increasing the Pd crystallite nanostructure with increasing annealing temperature.

关键词： Pd Properties Coating XRD Band Gap Annealing Crystallite Nanostructure

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Study Coefficient and Optical Application of KCI Single Crystal with Sn Impurity Growth on Czochralski Method under Visible Radiation

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材料科学与工程（中英文A版） 2012年第12期2卷 799-802页

作者： feridoun Samavat Ebrahim Haji Ali Somayeh Solgi Physics Department Faculty of Science Bu-Ali-Sina University Hamedan Iran Physics Department Faculty of Science lmam Hossein University Tehran 1ran

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