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Applied Mathematics and Mechanics(English Edition) 2024年第3期45卷 407-424页

作者： M.SAFI M.VAKILIFARD M.J.MAHMOODI Faculty of Civil Water&Environmental EngineeringShahid Beheshti UniversityTehran ***Iran Faculty of Mechanical and Energy Engineering Shahid Beheshti UniversityTehran ***Iran

In this paper,layered periodic foundations(LPFs)are numerically examined for their responses to longitudinal and transverse modes in the time and frequency *** different unit-cells,i.e.,2-layer,4-layer,and 6-layer unit-cells,comprising concrete/rubber,concrete/rubber/steel/rubber,and concrete/rubber/steel/rubber/lead/rubber materials,respectively,are taken into ***,the viscoelasticity behavior of the rubber is modeled with two factors,i.e.,a frequency-independent(FI)loss factor and a linear frequency-dependent(FD)loss *** the extraction of the complex dispersion curves and the identification of the band gaps(BGs),the simulations of wave transmission in the time and frequency domains are performed using the COMSOL *** parametric studies evaluate the effects of the rubber viscoelasticity models on the dispersion curves and the wave transmission for the longitudinal and transverse *** results show that considering the rubber viscoelasticity enhances the wave attenuation ***,the transverse-mode damping is more sensitive to the viscoelasticity model than its longitudinal *** 6-layer unit-cell LPF exhibits the lowest BG,ranging from 4.8 Hz to 6.5 Hz.

关键词： layered metamaterial periodic foundation complex dispersion curve wave transmission diagram

Electrospun Aloe Vera Extract Loaded Polycaprolactone Scaffold for Biomedical Applications:A Promising Candidate for Corneal Stromal Regeneration

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Journal of Bionic Engineering 2024年第4期21卷 1949-1959页

作者： Amin Orash Mahmoud Salehi Mohammad Rafienia Narsimha Mamidi Saeed Heidari Keshel Alireza Baradaran-Rafii Department of Chemistry and Nanotechnology School of Engineering and ScienceTecnologico de MonterreyMonterreyNuevo Leon64849Mexico Biosensor Research Center Isfahan University of Medical SciencesIsfahan81746-73461Iran Wisconsin Center for NanoBioSystems School of PharmacyUniversity of Wisconsin-MadisonMadisonWisconsin53705USA medical Nanotechnology Research Center Shahid Beheshti University of Medical SciencesTehran19857-17443Iran Department of Ophthalmology Ophthalmic Research CenterLabbafinejad Medical CenterShahid Beheshti University of Medical SciencesTehran19395-4631Iran Department of Ophthalmology Morsani College of MedicineUniversity of South FloridaTampaFL33612USA Department of Tissue Engineering and Applied Cell Science School of Advanced Technologies in MedicineShahid Beheshti University of Medical SciencesTehran19857-17443Iran

Corneal diseases,the second leading cause of global vision loss affecting over 10.5 million people,underscores the unmet demand for corneal tissue *** the scarcity of fresh donor corneas and the associated risks of immune rejection,corneal tissue engineering becomes *** nanofibrous scaffolds that mimic the natural corneal structure is crucial for creating transparent and mechanically robust corneal equivalents in tissue ***,Aloe Vera Extract(AVE)/Polycaprolactone(PCL)nanofibrous scaffolds were primed using *** electrospun AVE/PCL fibers exhibit a smooth,bead-free morphology with a mean diameter of approximately 340±95 nm and appropriate light *** measurements reveal Young’s modulus and ultimate tensile strength values of around 3.34 MPa and 4.58 MPa,respectively,within the range of stromal *** addition,cell viability of AVE/PCL fibers was measured against Human Stromal Keratocyte Cells(HSKCs),and improved cell viability was *** cell-fiber interactions were investigated using scanning electron *** conclusion,the incorporation of Aloe Vera Extract enhances the mechanical,optical,hydrophilic,and biological properties of PCL fibers,positioning PCL/AVE fiber scaffolds as promising candidates for corneal stromal regeneration.

关键词： Corneal stromal regeneration Aloe vera extract Polycaprolactone Electrospinning

The Anxiolytic and Antidepressant Effect of Stachys Lavandulifolia in the Experimental Pentylenetetrazole-Induced Rat Model of Acute Seizure

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World Journal of Traditional Chinese Medicine 2024年第1期10卷 114-120页

作者： Vahid Azizi Farzin Allahyari Abdolkarim Hosseini Department of Animal Sciences Faculty of Life Sciences and BiotechnologyShahid Beheshti UniversityTehranIran

Objective:In traditional medicine,Stachys lavandulifolia or mountain tea has been used in the treatment of arthritis and rheumatoid arthritis.A leaf extract from this plant is also thought to be effective in treating epilepsy as well as other neurological *** assess the effect of *** extract(SLE),rats were exposed to a stress and anxiety model caused by *** and Methods:A challenge dose of pentylenetetrazole(PTZ)(60 mg/kg)was used to induce seizures in male Wistar rats(200-250 g).Animal treated with an intraperitoneal injection of either SLE(50 mg/kg)or sodium valproate(100 mg/kg)alone or in combination 30 min before PTZ *** effect of stress and anxiety was assessed using an open field test(OFT),forced swim test(FST),and elevated plus maze(EPM).At the end of the experiment,anesthesia was used to euthanize rats,and their blood serum was collected for measurements of glutathione(GSH),malondialdehyde(MDA),and GSH peroxidase(GPx).Results:In contrast to the control group,those treated with PTZ exhibited depressive *** 50 mg/kg,SLE provided protection against seizures induced by *** also reduced seizure-induced stress and anxiety,significantly improving FST,EPM,and OFT compared with the PTZ-treated *** decreasing MDA levels and restoring the antioxidant enzymes GSH and GPx,SLE treatment protects against seizure-induced anxiety and ***:SLE inhibits oxidative stress damage and seizure-induced stress by inhibiting seizures'inhibitory effects.

关键词： Anxiety behavior depression oxidative stress traditional medicine

考虑气动载荷的超级高铁系统混合悬挂吊舱稳定性分析

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Acta Mechanica Sinica 2024年第4期40卷 199-211页

作者： Hamed Petoft Abbas Rahi Vahid Fakhari Faculty of Mechanical and Energy Engineering Shahid Beheshti UniversityTehran***Iran

超级高铁运输技术(HTT)是一种新型运输方式.它的工作原理是将一种称为吊舱的超高速车辆移动到低气压管中.本文研究了考虑空气动力载荷的新型混合悬浮吊舱的稳定性分析.拟议的吊舱包含两个悬浮装置:磁悬浮(EMS)和气垫.在这方面,气垫有助... 详细信息

超级高铁运输技术(HTT)是一种新型运输方式.它的工作原理是将一种称为吊舱的超高速车辆移动到低气压管中.本文研究了考虑空气动力载荷的新型混合悬浮吊舱的稳定性分析.拟议的吊舱包含两个悬浮装置:磁悬浮(EMS)和气垫.在这方面,气垫有助于系统克服整体重量.EMS悬架有两个比例微分(PD)控制器,可在存在空气动力载荷的情况下稳定吊舱的运动:一个控制垂直位移,另一个控制横向运动.本文建立了吊舱的五自由度动力学模型,包括吊舱的垂直和横向位移以及吊舱的俯仰、滚转和偏航力矩.介绍了气垫、磁悬浮和空气动力载荷的动态模型.求解相关动力学方程后,研究了控制器参数和气动升力和阻力载荷对吊舱稳定性的影响.此外,还分析了控制器系数和其他一些吊舱设计参数(包括气垫刚度、总质量和管内气压)对临界速度的影响.

关键词：横向运动空气动力载荷横向位移磁悬浮吊舱偏航力矩混合悬浮整体重量

Soft multifunctional neurological electronic skin through intrinsically stretchable synaptic transistor

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Nano Research 2024年第7期17卷 6550-6559页

作者： Pengcheng Zhu Shuairong Mu Wenhao Huang Zeye Sun Yuyang Lin Ke Chen Zhifeng Pan Mohsen Golbon Haghighi Roya Sedghi Junlei Wang Yanchao Mao Key Laboratory of Materials Physics of Ministry of Education School of Physics and MicroelectronicsZhengzhou UniversityZhengzhou 450001China School of Mechanical and Power Engineering Zhengzhou UniversityZhengzhou 450001China Department of Chemistry Shahid Beheshti UniversityTehran ***Iran

Neurological electronic skin(E-skin)can process and transmit information in a distributed manner that achieves effective stimuli perception,holding great promise in neuroprosthetics and soft *** E-skin with multifunctional perception abilities can enable robots to precisely interact with the complex surrounding ***,current neurological E-skins that possess tactile,thermal,and visual perception abilities are usually prepared with rigid materials,bringing difficulties in realizing biologically synapse-like ***,we report a soft multifunctional neurological E-skin(SMNE)comprised of a poly(3-hexylthiophene)(P3HT)nanofiber polymer semiconductor-based stretchable synaptic transistor and multiple soft artificial sensory receptors,which is capable of effectively perceiving force,thermal,and light *** stretchable synaptic transistor can convert electrical signals into transient channel currents analogous to the biological excitatory postsynaptic *** it also possesses both short-term and long-term synaptic plasticity that mimics the human memory *** integrating a stretchable triboelectric nanogenerator,a soft thermoelectric device,and an elastic photodetector as artificial receptors,we further developed an SMNE that enables the robot to make precise actions in response to various surrounding *** with traditional neurological E-skin,our SMNE can maintain the softness and adaptability of biological synapses while perceiving multiple stimuli including force,temperature,and *** SMNE could promote the advancement of E-skins for intelligent robot applications.

关键词： electronic skin soft stretchable polymer semiconductor synaptic transistor multifunctional

Effect of thermal maturation and organic matter content on oil shale fracturing

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International Journal of Coal Science & Technology 2024年第2期11卷 16-34页

作者： Fatemeh Saberi Mahboubeh Hosseini‑Barzi Department of Geology and Geological Engineering University of North Dakota264 Centennial DriveGrand ForksNDUSA Department of Geology and Petroleum Basins Shahid Beheshti University of TehranTehranTehran ProvinceIran

The Pabdeh Formation represents organic matter enrichment in some oil fields,which can be considered a source *** study is based on the Rock–Eval,Iatroscan,and electron microscopy imaging results before and after heating the *** discovered this immature shale that undergoes burial and diagenesis,in which organic matter is converted into *** migration is the process that transports hydrocarbons in the source *** investigated this phenomenon by developing a model that simulates hydrocarbon generation and fluid pressure during kerogen-to-hydrocarbon *** initially formed at the tip/edge of kerogen and were filled with hydrocarbons,but as catagenesis progressed,the pressure caused by the volume increase of kerogen decreased due to hydrocarbon *** transformation of solid kerogen into low-density bitumen/oil increased the pressure,leading to the development of damage zones in the source *** Pabdeh Formation’s small porethroats hindered effective expulsion,causing an increase in pore fluid pressure inside the initial *** stress accumulated due to hydrocarbon production,reaching the rock’s fracture strength,further contributed to damage zone *** the expansion process,microfractures preferentially grew in low-strength pathways such as lithology changes,laminae boundaries,and pre-existing *** the porous pressure created by each kerogen overlapped,individual microfractures interconnected,forming a network of microfractures within the source *** research sheds light on the complex interplay between temperature,hydrocarbon generation,and the development of expulsion fractures in the Pabdeh Formation,providing valuable insights for understanding and optimizing hydrocarbon extraction in similar geological settings.

关键词： Oil shale Microfracture Hydrocarbon generation Organic matter Thermal maturation Primary migration

Leveraging Nanotechnology for Addressing COVID-19: Revealing Antiviral Approaches and Hurdles

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World Journal of Nano Science and Engineering 2024年第1期14卷 1-14页

作者： Mehrnaz Mostafavi Mahtab Shabani Department of Physics Faculty of Allied Medicine Shahid Beheshti University of Medical Sciences Tehran Iran Department of Internal Medicine Loghman Hakim Hospital Shahid Beheshti University of Medical Sciences Tehran Iran

The emergence of COVID-19 has caused extensive harm and is recognized as a significant threat to human life worldwide. Currently, the application of nanomedicine techniques in pre-clinical studies related to various infections, such as respiratory viruses, herpes viruses, human papillomavirus, and HIV, has demonstrated success. Nanoparticles, due to their specific attributes, have garnered considerable attention in combating COVID-19. Strategies employing nanomaterials for COVID-19 prevention encompass the development of rapid, precise diagnostic tools, the creation of effective disinfectants, the delivery of mRNA vaccines to the biological system, and the administration of antiretroviral medications within the body. This article focuses on recent research regarding the effectiveness of nano platforms as antiviral measures against coronaviruses. It delves into the molecular characteristics of coronaviruses and the affected target systems, highlighting challenges and limitations in combating SARS-CoV-2. Additionally, it explores potential nanotechnology-based treatments to confront current and future variants of coronaviruses associated with COVID-19 infections.

关键词： COVID-19 Coronavirus Nanomaterials Nano-Based Vaccine SARS-CoV-2

Insight into small eyes: a practical description from phenotypes presentations to the management

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International Journal of Ophthalmology(English edition) 2024年第2期17卷 380-391页

作者： Sana Niazi Sorcha NíDhubhghaill Farideh Doroodgar Zisis Gatzioufas Mohammad Hossein Dehghan Translational Ophthalmology Research Center Tehran University of Medical SciencesTehran ***Iran Antwerp university Hospital Edegem 2650Belgium Faculty of Health Sciences Antwerp UniversityAntwerpen 2000EdegemBelgium Negah Aref Ophthalmic Research Center Shahid Beheshti University of Medical SciencesTehran 16666Iran university Eye Hospital Basel Basel 4031Switzerland

This narrative review aimed to have an algorithmic approach to microphthalmos by a systematic *** definition can be related to a number of special *** the more challenging cases of complex microphthalmos,relative anterior microphthalmos,and nanophthalmos,the surgeon can approach these cases more safely if they have a deep understanding of the anatomical variations and ideal formulae for intraocular lens computation and knows how to avoid intra-and post-operative *** this article,we review the criteria by which we recognize and describe pre-,intra-,and post-operative considerations,as well as discuss the ideal intraocular lenses for microphthalmos,given the intricate varieties of small eye phenotypes.

关键词： microphthalmos nanophthalmos lenses intraocular anterior chamber axial length eye cataract microcornea syndrome

Applications of SMILE-extracted lenticules in ophthalmology

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International Journal of Ophthalmology(English edition) 2024年第1期17卷 173-187页

作者： Hossein Aghamollaei Hassan Hashemi Mahsa Fallahtafti Seyed-Hashem Daryabari Mehdi Khabazkhoob Khosrow Jadidi Chemical Injuries Research Center Systems Biology and Poisonings InstituteBaqiyatallah University of Medical SciencesTehran ***Iran Noor Research Center for Ophthalmic Epidemiology Noor Eye HospitalTehran ***Iran Vision Health Research Center Semnan University of Medical SciencesSemnan ***Iran Department of Basic Sciences School of Nursing and MidwiferyShahid Beheshti University of Medical SciencesTehran ***Iran

AIM:To review recent innovations,challenges,and applications of small incision lenticule extraction(SMILE)extracted lenticule for treating ocular ***:A literature review was performed in the PubMed database,which was last updated on 30 December *** was no limit regarding *** authors evaluated the reference lists of the collected papers to find any relevant ***:Due to the simplicity and accuracy of modern femtosecond lasers and the extensive development of SMILE surgery,many healthy human corneal stromal lenticules were extracted during surgery,motivating some professionals to investigate the SMILE lenticule reusability in different ocular *** addition,new approaches had been developed to preserve,modify,and bioengineer the corneal stroma,leading to the optimal use of discarded byproducts such as lenticules from SMILE *** lenticules can be effectively re-implanted into the autologous or allogenic corneas of human subjects to treat refractive errors,corneal ectasia,and corneal perforation and serve as a patch graft for glaucoma drainage devices with better cosmetic ***:SMILE-extracted lenticules could be a viable alternative to human donor corneal tissue.

关键词： small incision lenticule extraction corneal lenticule implantation keratoconus corneal perforation femtosecond laser stromal keratophakia

Rice Husk at a Glance:From Agro-Industrial to Modern Applications

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Rice science 2024年第1期31卷 14-32页

作者： Masoumeh KORDI Naser FARROKHI Martin I.PECH-CANUL Asadollah AHMADIKHAH Department of Cell&Molecular Biology Faculty of Life Sciences and BiotechnologyShahid Beheshti UniversityTehran ***Iran 1062 Metallurgical Industry Avenue Industrial Park Saltillo-Ramos ArizpeRamos ArizpeCoahuila 25900Mexico

Excessive waste production has led to the concept of a circular bioeconomy to deliver valuable by-products and improve environmental *** annual worldwide rice production accounts for more than 750 million tons of grain and 150 million tons of *** husk(RH)contains valuable biomaterials with extensive applications in various *** proportions of each component depend primarily on rice genotype,soil chemistry,and climatic *** and its derivatives,including ash,biochar,hydrochar,and activated carbon have been placed foreground of applications in agriculture and other *** the investigation on RH’s compositions,microstructures,and by-products has been done copiously,owing to its unique features,it is still an open-ended area with enormous scope for innovation,research,and ***,we reviewed the latest applications of RH and its derivatives,including fuel and other energy resources,construction materials,pharmacy,medicine,and nanobiotechnology to keep this versatile biomaterial in the spotlight.

关键词： circular bioeconomy rice husk activated carbon rice husk ash rice husk biochar rice husk hydrochar rice husk application