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Combination therapy using evening primrose oil and electrical stimulation to improve nerve function following a crush injury of sciatic nerve in male rats

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Neural Regeneration Research 2017年第3期12卷 458-463页

作者： Omid Badri Parviz Shahabi Jalal Abdolalizadeh Mohammad Reza Alipour Hadi Veladi Mehdi Farhoudi mohsen sharif zak Tabriz University of Medical Sciences International Branch ArasTabrizIran Neuroscience Research Center Tabriz University of Medical SciencesTabrizIran Immunology Research Center Tabriz University of Medical SciencesTabrizIran Drug Applied Research Center Tabriz University of Medical SciencesTabrizIran Microsystem Fabrication Laboratory Tabriz UniversityTabrizlran Department of Biochemistry Faculty of MedicineTabriz University of Medical SciencesTabrizIran

Peripheral nerve injuries with a poor prognosis are *** primrose oil（EPO） has beneficial biological effects and immunomodulatory *** electrical activity plays a major role in neural regeneration,the present study investigated the effects of electrical stimulation（ES）,combined with evening primrose oil（EPO）,on sciatic nerve function after a crush injury in *** anesthetized rats,the sciatic nerve was crushed using small haemostatic forceps followed by ES and/or EPO treatment for 4 *** recovery of the sciatic nerve was assessed using the sciatic functional *** changes of gastrocnemius muscle atrophy were investigated by light *** changes were assessed by the nerve conduction velocity of sciatic *** was used to determine the remyelination of the sciatic nerve following the *** ＋ ES,EPO,and ES obviously improved sciatic nerve function assessed by the sciatic functional index and nerve conduction velocity of the sciatic nerve at 28 days after *** of the peripheral nerve remyelination marker,protein zero（P0）,was increased in the treatment groups at 28 days after *** atrophy severity was decreased significantly while the nerve conduction velocity was increased significantly in rats with sciatic nerve injury in the injury ＋ EPO ＋ ES group than in the EPO or ES *** speaking,the combined use of EPO and ES may produce an improving effect on the function of sciatic nerves injured by a *** increased expression of P0 may have contributed to improving the functional effects of combination therapy with EPO and ES as well as the electrophysiological and histopathological features of the injured peripheral nerve.

关键词： nerve regeneration peripheral nerve injury sciatic nerve injury evening primrose oil electrical stimulation sciatic functional index cuff electrode neural regeneration

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PPLS: a privacy-preserving location-sharing scheme in mobile online social networks

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Science China(Information Sciences) 2020年第3期63卷 173-183页

作者： Chang XU Xuan XIE Liehuang ZHU Kashif sharif Chuan ZHANG Xiaojiang DU mohsen GUIZANI School of Computer Science and Technology Beijing Institute of Technology Department of Computer and Information Sciences Temple University Department of Computer Science and Engineering Qatar University

The recent proliferation of mobile devices has given rise to mobile online social networks(m OSNs), an emerging network paradigm that uses social networks as its main design element. As one of the most critical components in m OSNs, location sharing plays an important role in helping users share information and strengthen their social bonds, which however may compromise users’ privacy, including location information and social relationship details. To address these challenges, some solutions have been proposed. However, none of them considers the privacy of inter-user threshold distance, which effectively can be used to identify users, their friends, and location information, by malicious or undesired elements of the system. To overcome this limitation, we propose a secure distance comparison protocol. Furthermore,we present a privacy-preserving location-sharing scheme(PPLS), which allows users to build more complex access control policies. The safety of our scheme is validated by the security analysis and the experimental results demonstrate the efficiency of PPLS scheme.

关键词： privacy-preservation location-sharing mobile online social networks

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Preparation, characterization, and antibacterial activity of γ-irradiated silver nanoparticles in aqueous gelatin

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International Journal of Minerals,Metallurgy and Materials 2013年第4期20卷 403-409页

作者： Majid Darroudi Mansor B. Ahmad Mohammad Hakimi Reza Zamiri Ali Khorsand zak Hasan Ali Hosseini mohsen Zargar Department of Modern Sciences and Technologies School of Medicine Mashhad University of Medical Sciences Department of Chemistry Faculty of Science Universiti Putra Malaysia Chemistry Department Payame Noor University Department of Materials Engineering and Ceramic CICECO University of Aveiro Electroceramics and Materials Lab. Physics Department Faculty of Science Ferdowsi University of Mashhad Faculty of Science Qom Branch Islamic Azad University

Colloidal silver nanoparticles （Ag-NPs） were obtained through γ-irradiation of aqueous solutions containing AgNO3 and gelatin as a silver source and stabilizer, respectively. The absorbed dose of γ-irradiation influences the particle diameter of the Ag-NPs, as evidenced from surface plasmon resonance （SPR） and transmission electron microscopy （TEM） images. When the γ-irradiation dose was increased （from 2 to 50 kGy）, the mean particle size was decreased continuously as a result of γ-induced Ag-NPs fragmentation. The antibacterial properties of the Ag-NPs were tested against Methicillinresistant Staphylococcus aureus （MRSA）（Gram-positive） and Pseudomonas aeruginosa （P.a）（Gram-negative） bacteria. This approach reveals that the γ-irradiation-mediated method is a promising simple route for synthesizing highly stable Ag-NPs in aqueous solutions with good antibacterial properties for different applications.

关键词： silver nanoparticles silver nitrate gelatin gamma rays irradiation bacteria

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Cattle toxoplasmosis in Iran:a systematic review and meta-analysis

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Asian Pacific Journal of Tropical Medicine 2015年第2期8卷 120-126页

作者： Shahabeddin Sarvi Ahmad Daryani Mohammad Taghi Rahimi mohsen Aarabi Azar Shokri Ehsan Ahmadpour Azadeh Mizani Mahdi sharif Toxoplasmosis Research Center Mazandaran University of Medical SciencesSariIranPostal Code:48168-95475 Department of Parasitology and Mycology Sari Medical SchoolMazandaran University of Medical SciencesSariIranPostal Code:48168-95475 Sari Medical School Mazandaran University of Medical SciencesSariIranPostal Code:48168-95475

Objective:To analyze and review the overall seroprevalence rate of Toxoplasma gondii(***) infection in cattle from ***:In the current study,data collection(published and unpublished papers,abstracts of national scientific congresses and dissertations) using particular terms was carried out systematically on the following electronic databases like PubMed,Google Scholar,Ebsco,Science Direct,Scopus,Magiran,Irandoc,IranMedex and SID(Scientific Information Database).Results:A total of 22 studies since 1983 to 2012 reporting the seroprevalence of toxoplasmosis in cattle from different regions of Iran met our eligibility *** pooled proportion of toxoplasmosis,using random effect model,among cattle in Iran from over the 30-year period was estimated 18.1%(95%CI:9.9%to 28.2%).Conclusions:This study firstly establishes a crude seroprevalence rate of Toxoplasma infection in cattle which can lead us to understand the condition of eattle toxoplasmosis,which have to take into accounted fur an appropriate and effective prevention and ***,it compares and discusses elaborately the role of risk factors including sex,age and breed in the epidemiology of the ***,it determines gaps and drawbacks in the prior studies which are greatly useful to design more accurate investigations in the future.

关键词： Toxoplasma gondii Prevalence Systematic review Meta-analysis Iran

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Comparison of epidemiologic features between upper and lower limb injuries and risk factors for intensive care unit admission in a university hospital affiliated with the National Trauma Registry of Iran

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Chinese Journal of Traumatology 2024年第6期27卷 389-394页

作者： Pouya Mahdavi sharif mohsen Merati Vali Baigi Mohammadreza Zafarghandi Vafa Rahimi-Movaghar Moein Khormali Marjan Laal Payman Salamati Sina Trauma and Surgery Research Center Tehran University of Medical SciencesTehranIran Department of Epidemiology and Biostatistics School of Public HealthTehran University of Medical SciencesTehranIran

Purpose:Upper extremity injuries(UEIs)and lower extremity injuries(LEIs)constitute a considerable component of ***,their epidemiologic differences and short-term in-hospital outcomes are not fully *** study aims to compare such discrepancies in a large-scale ***:In this retrospective study,all patients with UEIs and/or LEIs hospitalized from 24th July 2016 to 16th May 2020 in Sina Hospital,Tehran,Iran,and registered at the National Trauma Registry of Iran were enrolled in the *** demographic and clinical characteristics were extracted from the National Trauma Registry of Iran *** were grouped into either UEI or *** those with concomitant UEIs and LEIs,the more severe one based on the abbreviated injury scale was defined as the principal *** addition,cases with the abbreviated injury scale>3 for both UEI and LEI or concomitant injuries to body areas other than the limbs were *** samplest-test,Mann-WhitneyU test,Chi-square test,quintile regression models,and logistic regression models with"margins"command were used for statistical analyses,as ***:In this research,3170 eligible cases were *** the LEI group,there was a much higher proportion of male patients(86.7%vs.82.0%)and higher mean age(years,42.9vs.35.3)compared to the UEI group(bothp<0.001).Patients with an injury severity score(ISS)of 9-15 were outnumbered in the LEI group(22.9%vs.1.6%,p<0.001),while the proportion of those with an ISS<9 was higher in the UEI group(98.1%vs.76.8%,p<0.001).The multiple logistic regression model showed a statistically significant association between intensive care unit(ICU)admission and ISS(odds ratio(OR)=4.01 for ISS ***<9,95%confidence interval(CI)):3.01-5.35;OR=17.65 for ISS≥***<9,95%CI:4.03-77.27),age(OR=1.02,95%CI:1.01-1.03),cause of injury(OR=0.27 for blunt *** traffic crash,95%CI:0.08-0.90;OR=0.49 for cut/stab *** traffic crash,9

关键词： Wounds and injuries Lower extremity Upper extremity Intensive care unit Length of hospital stay

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Incremental dynamic analysis of concrete gravity dams including base and lift joints

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Earthquake Engineering and Engineering Vibration 2013年第1期12卷 119-134页

作者： Mohammad Alembagheri mohsen Ghaemian Dept.of Civil Engineering Sharif Univ.of TechnologyAzadi Ave.TehranIran

The growth in computer processing power has made it possible to use time-consuming analysis methods such as incremental dynamic analysis（IDA） with higher accuracy in less *** an IDA study,a series of earthquake records are applied to a structure at successively increasing intensity levels,which causes the structure to shift from the elastic state into the inelastic state and finally into *** this way,the limit-states and capacity of a structure can be *** the present research,the IDA of a concrete gravity dam considering a nonlinear concrete behavior,and sliding planes within the dam body and at the dam-foundation interface,is *** influence of the friction angle and lift joint slope on the response parameters are investigated and the various limit-states of the dam are *** is observed that by introducing a lift joint,the tensile damage can be avoided for the dam *** lift joint sliding is essentially independent of the base joint friction angle and the upper ligament over the inclined lift joint slides into the upstream direction in strong earthquakes.

关键词： concrete gravity dams incremental dynamic analysis seismic analysis damage index dam failures joints performance characteristics structural capacity

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Electrical annealing of severely deformed copper: microstructure and hardness

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International Journal of Minerals,Metallurgy and Materials 2017年第10期24卷 1158-1168页

作者： Saeed Nobakht mohsen Kazeminezhad Department of Materials Science and Engineering Sharif University of Technology Azadi Avenue Tehran Iran

Commercial pure copper sheets were severely deformed after primary annealing to a strain magnitude of 2.32 through constrained groove pressing. After induction of an electrical current, the sheets were heated for 0.5, 1, 2, or 3 s up to maximum temperatures of 150, 200, 250, or 300℃. To compare the annealing process in the current-carrying system with that in the current-free system, four other samples were heated to 300℃ at holding times of 60, 90, 120, or 150 s in a salt bath. The microstructural evolution and hardness values of the samples were then investigated. The results generally indicated that induction of an electrical current could accelerate the recrystallization process by decreasing the thermodynamic barriers for nucleation. In other words, the current effect, in addition to the thermal effect, enhanced the diffusion rate and dislocation climb velocity. During the primary stages of recrystallization, the grown nuclei of electrically annealed samples showed greater numbers and a more homogeneous distribution than those of the samples annealed in the salt bath. In the fully recrystallized condition, the grain size of electrically annealed samples was smaller than that of conventionally annealed samples. The hardness values and metallographic images obtained indicate that, unlike the conventional annealing process, which promotes restoration phenomena with increasing heating time, the electrical annealing process does not necessarily promote these phenomena. This difference is hypothesized to stem from conflicts between thermal and athermal effects during recrystallization.

关键词： annealing severe plastic deformation copper microstructure hardness

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A comparative study of physicochemical and photocatalytic properties of visible light responsive Fe,Gd and P single and tri-doped TiO_2 nanomaterials

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Journal of Rare Earths 2018年第1期36卷 72-85页

作者： seyed mohsen adyani mohammad ghorbani department of materials science and engineering sharif university of technologyPO．Box 11155-9466Tehran，lran institute for nanoscience and nanotechnology(inst) sharif university of technologyP0．Box 11155-8639，Tehran1ran

High performance Fe-Gd-P tri-doped TiO2 nanoparticles （1 at% for each dopant） were successfully synthesized by a modified sol-gel method. Various analytical and spectroscopic techniques were carried out to determine the physicochemical properties of the prepared samples, including XRD, EDX, FESEM, BET, FFIR, XPS, PL, EIS and UV-Vis diffuse reflectance spectroscopy. The photocatalytic activities of prepared samples were evaluated by photo degradation of methyl orange （MO） and 4-chlorophenol （4- CP） as model pollutants under visible light irradiation. Effects of each dopant on different properties of TiO2 nanoparticles were investigated. Results show that Gd and P doping enhances Ti02 surface textural properties by forming Ti O Gd and Ti-O-P bonds. It is found that Gd plays a superior role in increasing oxygen vacancies and organic species on TiO2 surface. Gd doping also facilitates transferring of the photo-induced charge carriers to the surface adsorbed species. The enhanced electronic band structure and visible light response, as well as high electron lifetime of Fe-Gd-P tri-doped sample is mainly attributed to Fe and Gd doping. The tri-doped TiO2 with rate constant ofkapp - 1.28 ~ 10-2 min-1 for MO and kapp ~ 0.94 ~ 10-2 min-1 for 4-CP, shows the highest photodegradation rate among all samples including undoped and single doped samples. The improved photocatalytic performance of Fe-Gd-P tri- doped Ti02 is due to the synergistic effect of enhanced surface chemistry and textural properties, increased number of surface adsorbed hydroxyl groups and organic species, improved visible light ab- sorption, increased lifetime of the photo-induced electron/hole pairs and boosted interfacial charge transfer.

关键词： Fe-Gd-P tri-doped TiO2Sol-gel synthesisPhotodegradationVisible light responseSynergistic effectRare earths

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Effect of seismic wave propagation in massed medium on rate-dependent anisotropic damage growth in concrete gravity dams

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Frontiers of Structural and Civil Engineering 2021年第2期15卷 346-363页

作者： Alireza DANESHYAR Hamid MOHAMMADNEZHAD mohsen GHAEMIAN Civil Engineering Department Sharif University of TechnologyTehran11155-9313Iran Faculty of Civil Water and Environmental EngineeringShahid Beheshti UniversityTehran11155-9313Iran

Seismic modeling of massive structures requires special caution,as wave propagation effects significantly affect the *** becomes more crucial when the path-dependent behavior of the material is *** coexistence of these conditions renders numerical earthquake analysis of concrete dams ***,a finite element model for a comprehensive nonlinear seismic simulation of concrete gravity dams,including realistic soil-structure interactions,is introduced.A semi-infinite medium is formulated based on the domain reduction method in conjunction with standard viscous *** representation of radiation damping in a half-space medium and wave propagation effects in a massed foundation are verified using an analytical solution of vertically propagating shear waves in a viscoelastic half-space domain.A rigorous nonlinear finite element model requires a precise description of the material ***,a microplane-based anisotropic damage-plastic model of concrete is formulated to reproduce irreversible deformations and tensorial degeneration of concrete in a coupled and rate-dependent ***,the Koyna concrete gravity dam is analyzed based on different assumptions of foundation,concrete response,and reservoir *** between responses obtained based on conventional assumptions with the results of the presented comprehensive model indicates the significance of considering radiation damping and employing a rigorous constitutive material model,which is pursued for the presented model.

关键词： soil-structure interaction massed foundation radiation damping anisotropic damage

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Investigation of Io's auroral hiss emissions due to its motion in Jupiter's magnetosphere

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Research in Astronomy and Astrophysics 2012年第6期12卷 693-702页

作者： mohsen H.Moghimi Department of Aerospace Engineering Sharif University of TechnologyTehranIran

The left-hand side of the auroral hiss emission observed by Galileo has a frequency time profile shaped very similar to the funnel shape observed in the Earth＇s auroral region. This close similarity indicates that we can use the theory of whistler- mode propagation near the resonance cone to locate the emission source. The general characteristics of the whistler mode are discussed. Then the position of the emission source is investigated using a geometrical method that takes into account the trajectory of Galileo. Initially a point source is assumed. Then the possibility of a sheet source aligned along the magnetic field lines which tigated. Both types of sources show that the close to the surface of Io. are tangent to the surface of Io is inves- whistler mode radiation originates veryclose to the surface of Io.

关键词： data analysis -- detectors -- magnetic fields -- spectrographs

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