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Enhanced axonal regeneration and functional recovery of the injured sciatic nerve in a rat model by lithium-loaded electrospun nanofibrous scaffolds

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Bio-Design and Manufacturing 2024年第5期7卷 701-720页

作者： Banafsheh Dolatyar Bahman Zeynali Iman Shabani Azita Parvaneh tafreshi Reza Karimi-Soflou Developmental Biology Laboratory School of BiologyCollege of ScienceUniversity of TehranTehran ***Iran Department of Biomedical Engineering Amirkabir University of Technology(Tehran Polytechnic)Tehran ***Iran Department of Molecular Medicine Faculty of Medical BiotechnologyNational Institute of Genetic Engineering and BiotechnologyTehran ***Iran 123

Increasing evidence indicates that engineered nerve grafts have great potential for the regeneration of peripheral nerve injuries(PNIs).While most studies have focused only on the topographical features of the grafts,we have considered both the biophysical and biochemical manipulations in our applied *** achieve this,we fabricated an electrospun nanofibrous scaffold(ENS)containing polylactide nanofibers loaded with lithium(Li)ions,a Wnt/β-catenin signaling *** addition,we seeded human adipose-derived mesenchymal stem cells(hADMSCs)onto this engineered scaffold to examine if their differentiation toward Schwann-like cells was *** further examined the efficacy of the scaffolds for nerve regeneration in vivo via grafting in a PNI rat *** results showed that Li-loaded ENSs gradually released Li within 11 d,at concentrations ranging from 0.02 to(3.64±0.10)mmol/L,and upregulated the expression of Wnt/β-catenin target genes(cyclinD1 and c-Myc)as well as those of Schwann cell markers(growth-associated protein 43(GAP43),S100 calcium binding protein B(S100B),glial fibrillary acidic protein(GFAP),and SRY-box transcription factor 10(SOX10))in differentiated *** the PNI rat model,implantation of Li-loaded ENSs with/without cells improved behavioral features such as sensory and motor functions as well as the electrophysiological characteristics of the injured *** improved function was further validated by histological analysis of sciatic nerves grafted with Li-loaded ENSs,which showed no fibrous connective tissue but enhanced organized myelinated *** potential of Li-loaded ENSs in promoting Schwann cell differentiation of hADMSCs and axonal regeneration of injured sciatic nerves suggests their potential for application in peripheral nerve tissue engineering.

关键词： Stem cell Schwann cell differentiation Electrospun nanofibrous scaffold Lithium ion Nerve regeneration

highly stable Ga-doped ZnO/polystyrene nanocomposite film with narrow-band cyan emission

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Journal of Semiconductors 2022年第12期43卷 46-54页

作者： Sanaz Alamdari Majid Jafar tafreshi Morteza Sasani Ghamsari Department of Nanotechnology Faculty of New Sciences and TechnologiesSemnan UniversitySemnan35131-19111Iran Faculty of Physics Semnan University35195-363SemnanIran Photonics&Quantum Technologies Research School Nuclear Science and Technology Research Institute11155-3486TehranIran

In the present study,a simple method for the preparation of a luminescent flexible gallium doped zinc oxide(GZO)/polystyrene nanocomposite film was *** prepared GZO powder was characterized through different optical and structural *** XRD study revealed the existence of a wurtzite structure with no extra oxide ***-mapping,EDX,FTIR and XPS analyses were used to confirm the presence of elements and the several groups present in the *** excitations of UV,the prepared hybrid nanocomposite showed a strong cyan emission with narrow full width at half the maximum value(20 nm)that has not been reported before.X-ray and laser-induced luminescence results of the hy-brid film revealed novel blue-green emission at room *** prepared composite film showed a strong scintillation re-sponse to ionizing *** strong emissions,very weak deep-level emissions,and low FWhM of composite indicate the de-sirable optical properties with low-density structural defects in the GZO composite ***,the prepared hybrid film can be considered to be a suitable candidate for the fabrication of optoelectronic devices.

关键词： Ga doped ZnO cyan emission narrow-band emission nanocomposite

Mathematical modeling of electrochemical storage for incorporation in methods to optimize the operational planning of an interconnected micro grid

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Journal of Zhejiang University-Science C(Computers and Electronics) 2010年第9期11卷 737-750页

作者： Elaheh MAShhOUR S.M.MOGhADDAS-tafreshi Department of Electrical Engineering K.N.Toosi University of Technology

We extract a mathematical model to simulate the steady-state charging and discharging behaviors of an electrochemical storage over a 24-hour time ***,we develop a model for optimizing the daily operational planning of an interconnected micro grid considering electrochemical *** optimization model is formulated to maximize the total benefit of the micro grid via selling power to its end consumers and also exchanging power with the wholesale energy market so that the constraints of distributed energy resources(DERs) and low-voltage grid are *** optimization problem is solved by a genetic algorithm,and applied on two micro grids operating under different scenarios containing the absence or presence of electrochemical *** of the results of the optimization model for this micro grid,with and without electrochemical storage,shows that the electrochemical storage can improve the economical efficiency of the interconnected micro grids by up to 10.16%.

关键词： Electrochemical storage Micro grid Operational planning Distributed energy resources

Impact of repeated loading on mechanical response of a reinforced sand

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Journal of Rock Mechanics and Geotechnical Engineering 2019年第4期11卷 804-814页

作者： Aida Mehrpazhouh Seyed Naser Moghadas tafreshi Mehdi Mirzababaei Department of Civil Engineering K.N. Toosi University of TechnologyTehranIran School of Engineering and Technology Central Queensland University120 Spencer StreetMelbourneVictoria3000Australia

Pavements constructed over loosely compacted subgrades may not possess adequate California bearing ratio (CBR) to meet the requirements of pavement design codes,which may lead to a thicker pavement design for addressing the required *** have been proven to be effective for mitigating the adverse mechanical behaviors of weak soils as integrated constituents of base and sub-base layers in road *** study investigated the behaviors of unreinforced and reinforced sand with nonwoven geotextile using repeated CBR loading test (followed by unloading and reloading).The depth and number of geotextile reinforcement layers,as well as the compaction ratio of the soil above and below the reinforcement layer(s) and the compaction ratio of the sand bed,were set as variables in this *** layers were placed at upper thickness ratios of 0.3,0.6 and 0.9 and the lower thickness ratio of *** compaction ratios of the upper layer and the sand bed varied between 85% and 97% to simulate a dense layer on a medium dense sand bed for all unreinforced and reinforced testing *** CBR loading tests were conducted to the target loads of 100 kgf,150 kgf,200 kgf and 400 kgf,respectively (1 kgf=9.8 N).The results indicated that placing one layer of reinforcement with an upper thickness ratio of 0.3 and compacting the soil above the reinforcement to compaction ratio of 97% significantly reduced the penetration of the CBR piston for all target repeated load ***,using two layers of reinforcement sandwiched between two dense soil layers with a compaction ratio of 97% with upper and lower thickness ratios of 0.3 resulted in the lowest penetration.

关键词： Geosynthetics Geotextile Reinforced soil California bearing ratio (CBR) Elastic behavior Repeated loading Dense sand Medium dense sand

Narrowing the focus:Therapeutic cell surface targets for refractory triple-negative breast cancer

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World Journal of Clinical Oncology 2020年第4期11卷 169-179页

作者： Narges K tafreshi David L Morse Marie Catherine Lee Department of Cancer Physiology Moffitt Cancer CenterTampaFL 33612United States Department of Physics University of South FloridaTampaFL 33612United States Division of Oncologic Sciences University of South FloridaTampaFL 33612 FLUnited States Comprehensive Breast Program Moffitt Cancer CenterTampaFL 33612United States

Triple-negative breast cancer(TNBC)is defined as a type of breast cancer with lack of expression of estrogen receptor,progesterone receptor and human epidermal growth factor 2 *** comparison to other types of breast cancer,TNBC characterizes for its aggressive behavior,more prone to early recurrence and a disease with poor response to molecular target *** TNBC is identified in only 25%-30%of American breast cancer cases annually,these tumors continue to be a therapeutic challenge for clinicians for several reasons:Tumor heterogeneity,limited and toxic systemic therapy options,and often resistance to current standard therapy,characterized by progressive disease on treatment,residual tumor after cytotoxic chemotherapy,and early recurrence after complete surgical ***-surface targeted therapies have been successful for breast cancer in general,however there are currently no approved cell-surface targeted therapies specifically indicated for ***,several cell-surface targets have been identified as candidates for treatment of TNBC and associated targeted therapies are in *** purpose of this work is to review the current clinical challenges posed by TNBC,the therapeutic approaches currently in use,and provide an overview of developing cell surface targeting approaches to improve outcomes for treatment resistant TNBC.

关键词： Breast cancer Triple negative Biomarker Cell surface Targeted therapy Chemorefractory

Integrating IPsec within OpenFlow Architecture for Secure Group Communication

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ZTE Communications 2014年第2期12卷 41-49页

作者： Vahid heydari Fami tafreshi Ebrahim Ghazisaeedi haitham Cruickshank Zhili Sun Centre for Communication System Research (CCSR) University of Surrey Department of Systems and Computer Engineering Carleton University

Network security protocols such as IPsec have been used for many years to ensure robust end-to-end communication and are important in the context of SDN. Despite the widespread installation of IPsec to date, per-packet protection offered by the protocol is not very compatible with OpenFlow and tlow-like behavior. OpenFlow architecture cannot aggregate IPsee-ESP flows in transport mode or tunnel mode because layer-3 information is encrypted and therefore unreadable. In this paper, we propose using the Security Parameter Index （SPI） of IPsec within the OpenFlow architecture to identify and direct IPsec flows. This enables IPsec to conform to the packet-based behavior of OpenFlow architecture. In addition, by distinguishing between IPsec flows, the architecture is particularly suited to secure group communication.

关键词： IPsec OpenFlow secure group communication group domain of interpretation (GDOI) flow-based switching

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世界屋脊上方的星空

中国国家天文 2011年第4期5卷 118-123页

作者： Babak A．tafreshi 司南（译）

我们似乎是在天堂里行走。这里除了环绕我们的浓雾和远处山谷河水的声音外再没有其它。为了找到合适的拍摄地点，我们已经在山里走了3天，现花我们位于海拔4000米的地方，等待着神话般的喜马拉雅山的天空暗下来。正是这引人入胜的景色... 详细信息

我们似乎是在天堂里行走。这里除了环绕我们的浓雾和远处山谷河水的声音外再没有其它。为了找到合适的拍摄地点，我们已经在山里走了3天，现花我们位于海拔4000米的地方，等待着神话般的喜马拉雅山的天空暗下来。正是这引人入胜的景色，已经把我们带到了尼泊尔。

关键词：星空屋脊世界喜马拉雅山尼泊尔山谷浓雾

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拍摄壮丽夜景的技巧

中国国家天文 2012年第11期6卷 118-123页

作者： Babak A.tafreshi 郭晓博(译)

从巴西海岸外的一个小岛上看去，银河系高高地悬挂在椰子树之上。柔和的海浪打破了小岛的宁静，轻轻地冲刷着海边细小的沙粒。当我站在照相机旁边时，这无数的沙粒就在脚下，我正试图拍摄头顶上无垠的星海和脚下宁静的大地。

关键词：拍摄夜景西海岸椰子树银河系照相机宁静沙粒

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拍摄北极光

中国国家天文 2013年第3期7卷 118-123页

作者： Babak A.tafreshi 郭晓博(译)

使用本文介绍的这些简单技巧，就可以拍摄出极具魅力的极光照片。2012年3月5日。我坐在电脑前，在***网站上搜索关于太阳活动的最新动态。我看到一个巨大的太阳黑子出现在日面边缘，它咆哮着，很可能会产生X级耀班以及气体喷发，进而将... 详细信息

使用本文介绍的这些简单技巧，就可以拍摄出极具魅力的极光照片。2012年3月5日。我坐在电脑前，在***网站上搜索关于太阳活动的最新动态。我看到一个巨大的太阳黑子出现在日面边缘，它咆哮着，很可能会产生X级耀班以及气体喷发，进而将大量太阳风粒子吹进地球的磁层。这样的太阳活动很可能在接下来的两周里导致壮观的极光。看来，是我该收拾行装、准备出发的时候了!

关键词：北极光拍摄太阳活动 com 太阳黑子太阳风日面喷发