检索结果-南通市图书馆

CDX2 protein expression compared to alcian blue staining in the evaluation of esophageal intestinal metaplasia

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2015年第9期21卷 2770-2776页

作者： Dennis R Johnson Maisoun Abdelbaqui maryam tahmasbi Zoltan Mayer Hung-Wei Lee Mokenge P Malafa Domenico Coppola Department of Anatomic Pathology Moffitt Cancer Center and Research InstituteTampaFL 33612United States Florida Digestive Health Specialists Lakewood RanchFL 34202United States Department of Oncological Sciences University of South FloridaTampaFL 33612United States GI Tumor Program Moffitt Cancer Center and Research InstituteTampaFL 33612United States Tumor Biology Program Moffitt Cancer Center and Research InstituteTampaFL 33612United States

AIM:To compare the sensitivity and specificity of CDX2 and alcian blue(AB) p H 2.5 staining in identifying esophageal intestinal ***:One hundred and ninty-nine biopsies from 186 patients were retrospectively reviewed and categorized as Barrett's esophagus(BE)(n =108); non-Barrett's esophagus(NBE)(n =48); columnar blue cells(CB) and esophageal glands(EG)(n =43).The biopsies were stained with AB and immunostained for CDX2 using a mouse monoclonal antibody from Biogenex(clone CDX2-88) and the Ventana Discovery X automated *** positive and negative predictive value of each group was used to determine the predictive power of CDX2 and AB in diagnosing intestinal ***:All of the 108 BE biopsies(100%) were positive for AB and 102 of them(94.4%) were positive for *** six BE patients(5.6%) who failed to stain with CDX2 were found to have lost the focus of intestinal metaplasia upon deeper sectioning for *** AB and CDX2 were negative in 43 out of 48(89.6%) NBE *** NBE patients(10.4%) were falsely positive for AB due to the presence of EG and CB in these *** cases were all CDX2 *** addition,5 AB negative NBE were found to be CDX2 *** on these results the CDX2 immunostain had similar sensitivity but higher specificity(100% vs about 91%) than AB in detecting intestinal type metaplasia in these *** data shows that CDX2 has a better PPV in detecting intestinal metaplasia as compared to AB(95.6% vs 71.5%,respectively).CONCLUSION:CDX2 has a better positive predictive value than AB in detecting intestinal ***2may be useful when challenged by gastro-esophageal biopsies containing mimikers of BE.

关键词： Barrett’s esophagus Alcian blue pH 2.5 CDX2 Intest

Anharmonic 1D actuator model including electrostatic and Casimir forces with fractional damping perturbed by an external force

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Mechanica Sinica 2018年第3期34卷 528-541页

作者： maryam Mansoori Kermani maryam Dehestani Department of Chemistry Shahid Bahonar University of Kerman

We modeled a one-dimensional actuator including the Casimir and electrostatic forces perturbed by an external force with fractional damping. The movable electrode was assumed to oscillate by an anharmonic elastic force originated from Murrell- Mottram or Lippincott potential. The nonlinear equations have been solved via the Adomian decomposition method. The behavior of the displacement of the electrode from equilibrium position, its velocity and acceleration were described versus time. Also, the changes of the displacement have been investigated according to the frequency of the external force and the voltage of the electrostatic force. The convergence of the Adomian method and the effect of the orders of expansion on the displacement versus time, frequency, and voltage were discussed. The pull-in parameter was obtained and compared with the other models in the literature. This parameter was described versus the equilibrium position and anharmonicity constant.

关键词： Murrell-Mottram potential Lippincott potential Casimir force Fractional damping Pull-in parameter Adomian decomposition method

On Countably Generated Dimension

在线全文

学校读者我要写书评

暂无评论

Algebra Colloquium 2021年第3期28卷 361-366页

作者： maryam Davoudian Department of Mathematics Shahid Chamran University of AhvazAhvazIran

In this article,we introduce and study the concept of countably generated dimension,which is a Krull-like dimension extension of the concept of DCC on countably generated *** show that some of the basic results of Krull dimension are true for countably generated *** is shown that an jR-module M has Krull dimension if and only if it has countably generated dimension,and its Krull dimension and countably generated dimension coincide.

关键词： countably generated module Krull dimension countably generated dimension

Forced vibration of smart laminated viscoelastic plates by RPT finite element approach

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Mechanica Sinica 2020年第4期36卷 933-949页

作者： Jafar Rouzegar maryam Davoudi Department of Mechanical and Aerospace Engineering Shiraz University of TechnologyShirazIran

In this study,a finite element formulation based on the four-variable refined plate theory(RPT)is presented for forced vibration analysis of laminated viscoelastic composite plates integrated with a piezoelectric *** the best of the authors’knowledge,this is the first time that the proposed approach is extended for study of the dynamic behavior of the smart viscoelastic *** utilized RPT which works for both thick and thin plates predicts a parabolic variation for transverse shear stresses across the plate *** a linear viscoelastic model for the substrate material,the relaxation module is predicted by the Prony *** Hamilton’s principle,the weak form equation is constructed and a four-node rectangular plate element is utilized for discretizing the *** Newmark scheme is employed for advancing the solution in time.A MATLAB code is developed based on the formulations and several benchmark problems are *** the findings with existing results in previous studies confirms the accuracy and efficiency of the proposed *** dynamic response of the smart viscoelastic plates under various electromechanical loads is investigated and the results show that *** can be passively controlled by adding and actuating the piezoelectric *** damping effects of viscoelastic parameters on the results are investigated,too.

关键词： Forced vibration Refined plate theory Viscoelastic material Piezoelectricity Smart structure Finite element method

A comprehensive layered approach for implementing internet of things-enabled smart grid:A survey

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Digital Communications and Networks 2022年第3期8卷 388-410页

作者： Zahra Alavikia maryam Shabro Electric Power Utility(EPU)Digital Transformation Center Niroo Research Institute(NRI)TehranIran

The current power grid confronts severe challenges in satisfying customers'*** transition to the much more flexible power grid enriched with renewable energies,micro-grid,and distributed energy resources has been considered as a straightforward solution to the customers’high *** smart equipment and renewable energies,electric power generation and storage through the power grid domains will be facilitated,which enables bi-directional energy and information *** power grid with such enhanced features is called Smart Grid(SG).Controlling and managing the diverse sets of variables in the SG requires precise measuring,monitoring,communicating,and analytic systems which increase the complexity of the *** complexity is the main barrier to the realization of the SG up to *** emergence of the Internet of Things(IoT)simplifies monitoring,communications,and data processing among smart things to connect to anything in the *** motivates the SG stakeholders and researchers to proceed with the best way to exploit the IoT technologies in the *** this survey paper,we summarize various efforts in this regard to highlight the advantages of the IoT-enabled SG and its probable *** this end,a comprehensive layered approach has been proposed in this paper to classify various applications of the IoT technologies in the *** IoT opportunities in each architecture layer facilitates the role of each technology and its relationship with other ***,open issues and future measures for the realization of IoT-enabled SG have been discussed in the paper.

关键词： Smart grid(SG) Internet of things(IoT) Layered approach Open issues

Substitution of a fraction of zircon by cristobalite in nano hematite encapsulated pigment and examination of glaze application

在线全文

学校读者我要写书评

暂无评论

Journal of Advanced Ceramics 2013年第2期2卷 149-156页

作者： maryam HOSSEINI-ZORI Department of Inorganic Pigments and Glazes Institute for Color Science and Technology(ICST)P.O.Box ***TehranIran

Hematite pigment has a long history,but it cannot be used for ceramic application,because it must be thermally and chemically stable at high firing temperature when using a pigment in a glaze or ceramic ***,through encapsulated systems,a new pigment with suitable thermal and chemical stability can be obtained by encapsulating hematite crystals into selected silica or zircon *** means that nano-sized red hematite has been encapsulated into the protected *** electron micrographs of hematite encapsulated into silica and zircon matrices by sol-gel method show spherical single crystals with diameter of about 5-10 *** order to optimize ceramic glaze formulations for application of the synthesized red inorganic nanocomposite inclusion pigment by sol-gel method,four different types of glazes(i.e.,alkalis,borate,earth alkalis,and leaded glazes)have been *** results show that the substitution of a fraction of zircon by cristobalite in hematite-zircon pigment produces acceptable stability with red hue.

关键词： nano hematite inclusion pigment zircon silica ceramic glaze

Reduction of the wind erosion potential in dried-up lakebeds using artificial biocrusts

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Frontiers of Earth Science 2022年第4期16卷 865-875页

作者： Hossein KHEIRFAM maryam ROOHI Department of Range and Watershed Management Faculty of Natural ResourcesUrmia UniversityUrmia ***Iran Department of Environmental Sciences Urmia Lake Research InstituteUrmia UniversityUrmia ***Iran Microbiology Laboratory Expert Artemia&Aquaculture Research InstituteUrmia UniversityUrmia ***Iran

The artificial creation of biocrusts can be a rapid and pervasive solution to reduce wind erosion potential(WEP)in dried-up lakes(e.g.,Lake Urmia).So,in this study,we created a biocrust by the inoculation of bacteria and cyanobacteria on trays filled by soils collected from the dried-up bed of Lake Urmia,Iran,to reduce WEP in laboratory *** used the wind erodible fraction of soil(EF)and soil crust factor(SCF)equations to calculate the WEP of the treated *** and SCF were decreased(p<0.05)through applying the co-inoculation of bacteria and cyanobacteria by 5.6%and 10.57%,respectively,as compared to the control;also,the"cyanobacteria alone"inoculation decreased EF by 3.9%.Our results showed that the artificial biocrusts created by soil inoculation,especially with the co-using of bacteria and cyanobacteria,significantly reduced the WEP of a newly dried-up ***,we found that inoculation decreased the WEP of the study soil by increasing the soil organic matter content from 3.7 to 5 *** to scanning electron microscopy images,the inoculated microorganisms,especially cyanobacteria,improved soil aggregation by their exopolysaccharides and filaments;thus,they can be used with other factors to estimate the soil erodibility in well-developed *** inoculation technique could be considered as a rapid strategy in stabilizing lakebeds against wind ***,it should be confirmed after additional experiments using wind tunnels under natural conditions.

关键词： biological soil crust dried-up lakes dust storms flowing-sands soil cyanobacteria

Phase-controlled field-effect micromixing using AC electroosmosis

在线全文

学校读者我要写书评

暂无评论

Microsystems & Nanoengineering 2020年第1期6卷 672-682页

作者： Paresa Modarres maryam Tabrizian Biomedical Engineering Department McGill UniversityMontrealQCCanada Faculty of Dentistry McGill University2001 McGill College AveMontrealQCCanada

The exploration and application of electrokinetic techniques in micro total analysis systems have become ubiquitous in recent years,and scientists are expanding the use of such techniques in areas where comparable active or passive methods are not as *** this work,for the first time,we utilize the concept of AC electroosmosis to design a phase-controlled field-effect micromixer that benefits from a three-finger sinusoidally shaped *** to field-effect transistor devices,the principle of operation for the proposed micromixer is governed by the source-gate and source-drain voltage potentials that are modulated by introducing a phase lag between the driving *** an optimized flow rate and biasing scheme,we demonstrate that the source,gate,and drain voltage phase relations can be configured such that the micromixer switches from an unmixed state(phase shift of 0°)to a mixed state(phase shift of 180°).High mixing efficiencies beyond 90%was achieved at a volumetric flow rate of 4µL/min corresponding to~13.9mm/s at optimized voltage excitation ***,we employed the proposed micromixer for the synthesis of nanoscale lipid-based drug delivery vesicles through the process of electrohydrodynamic-mediated *** phase-controlled electrohydrodynamic mixing utilized for the nanoprecipitation technique proved that nanoparticles of improved monodispersity and concentration can be produced when mixing efficiency is enhanced by tuning the phase shifts between electrodes.

关键词： effect mixing mixer

Kink-band Kinematic Analysis and its Implications for Late-stage Deformation in the Internal Parts of the Zagros Collision(Sanandaj–Sirjan Zone) in West Iran

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Geologica Sinica(English Edition) 2024年第4期98卷 921-935页

作者： maryam HEYDARI Mahdi BEHYARI Department of Geology Faculty of SciencesUrmia University57153165 UrmiaIran

In the internal parts of the Zagros collision zone, several deformation phases have been superimposed. The early deformation phase caused the development of a penetrative foliation. The late-stage deformation phase was preferentially accommodated within shear zones and caused the generation of shear bands, implying a non-coaxial component of deformation, the end of this stage deformation was marked by the development of kink-bands. In the vicinity of Zagros suture zone, the kink angle increased from 40° to 60°, and the kink-bands was converted to chevron folds. In this region, the external(α) and internal(β) angular ratio is α/β ≠ 1 and kink angle increased, and deformation occurred with 10% to 30% volume loss. Farther from the suture zone in the east, α/β = 1;and total volume was constant or increased by 5% to 10%. Kink-bands kinematic analysis in the study area revealed this structures were sensitive to deformation conditions and components such that, with decreasing distance to the Zagros suture zone, shearing and rotation increased, a high kinematic vorticity dominated, and volume loss occurred during deformation.

关键词： kink-band shear zone strain vorticity Zagros Iran