ORCID Profile
0000-0001-6667-9368
Current Organisation
Universiteit Twente
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Publisher: Springer Science and Business Media LLC
Date: 06-2015
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C4RA90054E
Abstract: Correction for ‘Chitosan (PEO)/bioactive glass hybrid nanofibers for bone tissue engineering’ by Sepehr Talebian et al. , RSC Adv. , 2014, 4, 49144–49152.
Publisher: Elsevier BV
Date: 12-2016
Publisher: Elsevier BV
Date: 09-2013
Publisher: American Chemical Society (ACS)
Date: 30-09-2015
Publisher: Elsevier BV
Date: 09-2015
Publisher: Elsevier BV
Date: 02-2014
Publisher: Elsevier BV
Date: 03-2013
Publisher: Elsevier BV
Date: 03-2017
Publisher: Elsevier BV
Date: 2016
Publisher: Hindawi Limited
Date: 2014
DOI: 10.1155/2014/379582
Abstract: This study describes the hydrothermal synthesis of a novel carbon almitic acid (PA) microencapsulated phase change material (MEPCM). The field emission scanning electron microscopy (FESEM) and high resolution transmission electron microscopy (HRTEM) images confirm that spherical capsules of uniform size were formed with a mean diameter of 6.42 μ m. The melting and freezing temperature were found to be slightly lower than those of pure PA with little undercooling. The composite retained 75% of the latent heat of pure PA. Thermal stability of the MEPCM was found to be better than that of pure PA. The thermal conductivity of MEPCM was increased by as much as 41% at 30°C. Due to its good thermal properties and chemical and mechanical stability, the carbon/PA MEPCM displays a good potential for thermal energy storage systems.
Publisher: Elsevier BV
Date: 11-2015
Publisher: Elsevier BV
Date: 12-2014
Publisher: MDPI AG
Date: 29-04-2013
DOI: 10.3390/MA6051608
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C6RA03721F
Abstract: A novel shape-stabilized phase change material (SSPCM) was fabricated by using a vacuum impregnation technique for solar-thermal energy storage applications.
Publisher: Wiley
Date: 21-12-2017
DOI: 10.1002/APP.46083
Publisher: Springer Science and Business Media LLC
Date: 10-07-2014
Publisher: Elsevier BV
Date: 12-2013
Publisher: Elsevier BV
Date: 08-2015
Publisher: Elsevier BV
Date: 05-2016
Publisher: Elsevier BV
Date: 11-2013
Publisher: Elsevier BV
Date: 03-2016
Publisher: Elsevier BV
Date: 06-2016
Publisher: Elsevier BV
Date: 12-2014
Publisher: American Chemical Society (ACS)
Date: 07-03-2017
Abstract: Tissue engineering aims to generate or facilitate regrowth or healing of damaged tissues by applying a combination of biomaterials, cells, and bioactive signaling molecules. In this regard, growth factors clearly play important roles in regulating cellular fate. However, uncontrolled release of growth factors has been demonstrated to produce severe side effects on the surrounding tissues. In this study, poly(lactic-co-glycolic acid) (PLGA) microspheres (MS) incorporated three-dimensional (3D) CORAGRAF scaffolds were engineered to achieve controlled release of platelet-derived growth factor-BB (PDGF-BB) for the differentiation of stem cells within the 3D polymer network. Fourier transform infrared spectroscopy, energy-dispersive X-ray spectroscopy, scanning electron microscopy, and microtomography were applied to characterize the fabricated scaffolds. In vitro study revealed that the CORAGRAF-PLGA-PDGF-BB scaffold system enhanced the release of PDGF-BB for the regulation of cell behavior. Stromal cell attachment, viability, release of osteogenic differentiation markers such as osteocalcin, and upregulation of osteogenic gene expression exhibited positive response. Overall, the developed scaffold system was noted to support rapid cell expansion and differentiation of stromal cells into osteogenic cells in vitro for bone tissue engineering applications.
Publisher: Elsevier BV
Date: 11-2016
Publisher: Elsevier BV
Date: 11-2015
Publisher: American Chemical Society (ACS)
Date: 09-07-2014
DOI: 10.1021/AM500845X
Abstract: Calcium silicate (CaSiO3, CS) ceramics are promising bioactive materials for bone tissue engineering, particularly for bone repair. However, the low toughness of CS limits its application in load-bearing conditions. Recent findings indicating the promising biocompatibility of graphene imply that graphene can be used as an additive to improve the mechanical properties of composites. Here, we report a simple method for the synthesis of calcium silicate/reduced graphene oxide (CS/rGO) composites using a hydrothermal approach followed by hot isostatic pressing (HIP). Adding rGO to pure CS increased the hardness of the material by ∼40%, the elastic modulus by ∼52%, and the fracture toughness by ∼123%. Different toughening mechanisms were observed including crack bridging, crack branching, crack deflection, and rGO pull-out, thus increasing the resistance to crack propagation and leading to a considerable improvement in the fracture toughness of the composites. The formation of bone-like apatite on a range of CS/rGO composites with rGO weight percentages ranging from 0 to 1.5 has been investigated in simulated body fluid (SBF). The presence of a bone-like apatite layer on the composite surface after soaking in SBF was demonstrated by X-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM). The biocompatibility of the CS/rGO composites was characterized using methyl thiazole tetrazolium (MTT) assays in vitro. The cell adhesion results showed that human osteoblast cells (hFOB) can adhere to and develop on the CS/rGO composites. In addition, the proliferation rate and alkaline phosphatase (ALP) activity of cells on the CS/rGO composites were improved compared with the pure CS ceramics. These results suggest that calcium silicate/reduced graphene oxide composites are promising materials for biomedical applications.
Publisher: American Chemical Society (ACS)
Date: 25-07-2014
DOI: 10.1021/IE501947U
Publisher: Elsevier BV
Date: 02-2015
Publisher: Elsevier BV
Date: 08-2015
Publisher: MDPI AG
Date: 22-09-2021
Abstract: Gellan-chitosan (GC) incorporated with CS: 0% (GC-0 CS), 10% (GC-10 CS), 20% (GC-20 CS) or 40% (GC-40 CS) w/w was prepared using freeze-drying method to investigate its physicochemical, biocompatible, and osteoinductive properties in human bone-marrow mesenchymal stromal cells (hBMSCs). The composition of different groups was reflected in physicochemical analyses performed using BET, FTIR, and XRD. The SEM micrographs revealed excellent hBMSCs attachment in GC-40 CS. The Alamar Blue assay indicated an increased proliferation and viability of seeded hBMSCs in all groups on day 21 as compared with day 0. The hBMSCs seeded in GC-40 CS indicated osteogenic differentiation based on an lified alkaline-phosphatase release on day 7 and 14 as compared with day 0. These cells supported bone mineralization on GC-40 CS based on Alizarin-Red assay on day 21 as compared with day 7 and increased their osteogenic gene expression (RUNX2, ALP, BGLAP, BMP, and Osteonectin) on day 21. The GC-40 CS–seeded hBMSCs initiated their osteogenic differentiation on day 7 as compared with counterparts based on an increased expression of type-1 collagen and BMP2 in immunocytochemistry analysis. In conclusion, the incorporation of 40% (w/w) calcium silicate in gellan-chitosan showed osteoinduction potential in hBMSCs, making it a potential biomaterial to treat critical bone defects.
Publisher: Springer Science and Business Media LLC
Date: 13-01-2014
Abstract: In the present study, stable homogeneous graphene nanoplatelet (GNP) nanofluids were prepared without any surfactant by high-power ultrasonic (probe) dispersion of GNPs in distilled water. The concentrations of nanofluids were maintained at 0.025, 0.05, 0.075, and 0.1 wt.% for three different specific surface areas of 300, 500, and 750 m 2 /g. Transmission electron microscopy image shows that the suspensions are homogeneous and most of the materials have been well dispersed. The stability of nanofluid was investigated using a UV-visible spectrophotometer in a time span of 600 h, and zeta potential after dispersion had been investigated to elucidate its role on dispersion characteristics. The rheological properties of GNP nanofluids approach Newtonian and non-Newtonian behaviors where viscosity decreases linearly with the rise of temperature. The thermal conductivity results show that the dispersed nanoparticles can always enhance the thermal conductivity of the base fluid, and the highest enhancement was obtained to be 27.64% in the concentration of 0.1 wt.% of GNPs with a specific surface area of 750 m 2 /g. Electrical conductivity of the GNP nanofluids shows a significant enhancement by dispersion of GNPs in distilled water. This novel type of nanofluids shows outstanding potential for replacements as advanced heat transfer fluids in medium temperature applications including solar collectors and heat exchanger systems.
Publisher: Elsevier BV
Date: 07-2017
Publisher: Springer Science and Business Media LLC
Date: 08-05-2015
Publisher: American Chemical Society (ACS)
Date: 09-02-2015
DOI: 10.1021/EF502840F
Publisher: Elsevier BV
Date: 08-2016
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C4RA06761D
Abstract: Incorporation of bioactive glass into chitosan (PEO) nanofibers leads to improvement of strength and bone-cell differentiation capability.
Publisher: Elsevier BV
Date: 06-2015
Publisher: Elsevier BV
Date: 09-2017
Publisher: Elsevier BV
Date: 03-2016
Publisher: Elsevier BV
Date: 02-2017
Publisher: Elsevier BV
Date: 11-2013
Publisher: Public Library of Science (PLoS)
Date: 17-09-2014
No related grants have been discovered for mohammad mehrali.