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Diagnosis of choroid plexus papilloma: Current perspectives and future directions

Cancer Pathogenesis and Therapy 2024年第3期2卷 173-179页

作者： Esma'il Akade Fereshteh Aslani Kimia Verdi Mohammad Bahadoram gholam abbas kaydani Department of Medical Virology School of MedicineAhvaz Jundishapur University of Medical SciencesAhvaz ***Iran Department of Laboratory Sciences School of Allied Medical SciencesAhvaz Jundishapur University of Medical SciencesAhvaz ***Iran Department of Physiology School of MedicineAhvaz Jundishapur University of Medical SciencesAhvaz ***Iran Department of Neurology School of MedicineAhvaz Jundishapur University of Medical SciencesAhvaz ***Iran

Choroid plexus papilloma(CPP)is a rare,slow-growing,and typically benign brain tumor that predominantly affects *** is characterized by well-defined circular or lobulated masses in the ventricles,leading to symptoms related to increased intracranial pressure and *** diagnosis relies on a combination of clinical presentation,imaging findings,and histological *** World Health Organization(WHO)classification categorizes choroid plexus tumors into CPP(Grade Ⅰ),atypical CPP(aCPP,Grade Ⅱ),and choroid plexus carcinoma(CPC,Grade Ⅲ).This article reviewed current diagnostics modalities and explored the emergence of new diagnostic methods for *** on molecular markers and genetic alterations associated with CPP is ongoing,and some potential markers have been *** results offered insights into potential therapeutic targets and personalized treatment approaches for *** in radiomics and liquid biopsy hold promise for improving diagnostic accuracy and monitoring treatment outcomes for choroid plexus *** can provide quantitative data from imaging studies,whereas liquid biopsy can analyze tumor-derived genetic material and molecular markers from body fluids,such as cerebrospinal fluid(CSF)and *** rapidly evolving fields of molecular and genetic research and novel diagnostic methods require continuous updates and advancements before their application in clinical *** hope that these advancements will lead to earlier and more precise diagnoses,better treatment options,and improved outcomes in patients with CPP and other brain tumors.

关键词： Cerebral ventricle neoplasms Biomarkers Neuroimaging Translational research Histopathological features

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Evaluation of protein Z plasma level in beta-thalassemia major patients in Ahvaz city in Iran

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Frontiers in Biology 2017年第6期12卷 442-447页

作者： Mohammad Taha Jalali Abdorrahim Absalan Alireza Mohseni gholam abbas kaydani Zeinab Deris Zayeri Department of Laboratory Sciences Hyperlipidemia Research Center Diabetes Research Center Jundishapur University of MedicalSciences Ahvaz Iran Shefa Neuroscience Research Center KhatamAlanbia Hospital Tehran Iran Blood Transfusion Research Center High Institute for Research and Education in Transfusion Medicine Tehran Iran Golestan Hospital Clinical Research Development Unit Ahvaz Jundishapur University of Medical Sciences Ahvaz Iran

Thrombotic episodes occurred frequently in beta-thalassemia major (BTM) patients, leading to hypercoagulability of plasma. Protein Z (PZ) is a vitamin-K-dependent anti-coagulation factor that plays a role in the human homeostatic process. The objective of the current study is to investigate the distribution pattern of PZ plasma concentrations between BTM patients and the normal population in Ahvaz city, the center of Khuzestan province, southwest of Iran. Forty confirmed BTM patients and 40 healthy volunteers were evaluated for complete blood count (CBC) indices and PZ plasma levels. CBC samples were measured using an automated cell counter, and PZ was assayed with an immunoassay method. Statistical analysis was conducted using SPSS software. The ROC curve and binary logistic regression estimated the sensitivity, specificity, and Odd’s ratio for PZ measurement. The mean±SD of the PZ plasma level in normal individuals was 1.68±0.63 μg/mL, and in BTM patients, it was 1.10±0.52 μg/mL. This shows a significant reduction of PZ in BTM patients statistically (CI = 0.99; p<0.001). Further, the mean±SD of the PZ plasma levels in BTM patients who received washed red blood cells was not significantly different from that of patients undergoing packed red blood cell therapy (CI = 0.95; p = 0.320). The area under the curve (AUC) for PZ was 0.759 (p = 0.00). The cut-off value = 1.4 μg/mL of the PZ plasma level had at least 70% sensitivity and specificity in BTM patients. Several epidemiologic studies have shown thromboembolism episodes in BTM patients. In the current study, PZ was reduced significantly in BTMs. We noticed that BTMs have lower plasma PZ concentration might be predisposed to BTM.

关键词： major beta-thalassemia protein Z thrombosis immunoassay anti-coagulation factor

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Experimental and Finite Element Analysis of Corroded High-Pressure Pipeline Repaired by Laminated Composite

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Computer Modeling in Engineering & Sciences 2024年第8期140卷 1783-1806页

作者： Seyed Mohammad Reza Abtahi Saeid Ansari Sadrabadi gholam Hosein Rahimi Gaurav Singh Hamid Abyar Daniele Amato Luigi Federico Faculty of Mechanical Engineering Tarbiat Modares UniversityTehran***Iran A.Leon Linton Department of Mechanical Robotics and Industrial EngineeringLawrence Technological UniversitySouthfieldMI48075USA Department of Mechanical Engineering Faculty of EngineeringMeybod UniversityYazd***Iran Department of Industrial Engineering University of SalernoVia Giovanni PaoloⅡFiscianoItaly Italian Aerospace Research Center(C.I.R.A.) Via MaioriseCapuaCE81043Italy

Repairs of corroded high-pressure pipelines are essential for fluids transportation under high *** of the methods used in their repairs is the use of layered *** composite used must have the necessary ***,the experiments and analytical solutions presented in this paper are performed according to the relevant standards and codes,including ASME PCC-2,ASME B31.8S,ASME B31.4,ISO 24817 and ASME *** addition,the experimental tests are replicated numerically using the finite element *** the strain gauges at different distances from the defect location,can reduce the nonlinear effects,deformation,and fluctuations due to the high *** direct relationship between the depth of an axial defect and the stress concentration is observed at the inner side edges of the *** reparation reduces the non-linearities related to the sharp variation of the geometry and a more reliable numerical simulation could be performed.

关键词： High-pressure pipeline composite repair ASME PCC-2 ISO 24817

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Mechanical characterization of Mg-B4C nanocomposite fabricated at different strain rates

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International Journal of Minerals,Metallurgy and Materials 2020年第2期27卷 252-263页

作者： gholam Hossein Majzoobi Kaveh Rahmani Mechanical Engineering Department Bu-Ali Sina University

Magnesium has wide application in *** main purpose of this investigation was to improve the properties of magnesium by reinforcing it using B4C *** reinforced nanocomposites were fabricated using a powder compaction technique for 0,1.5vol%,3vol%,5vol%,and 10vol% of *** compaction was conducted using a split Hopkinson bar(SHB),drop hammer(DH),and Instron to reach different compaction loading *** compressive stress–strain curves of the samples were captured from quasi-static and dynamic tests carried out using an Instron and split Hopkinson pressure bar,*** revealed that,to achieve the highest improvement in ultimate strength,the contents of B4C were 1.5vol%,3vol%,and 3vol% for Instron,DH,and SHB,*** results also indicated that the effect of compaction type on the quasi-static strength of the samples was not as significant,although its effect on the dynamic strength of the samples was *** improvement in ultimate strength obtained from the quasi-static stress–strain curves of the samples(compared to pure Mg)varied from 9.9% for DH to 24% for *** dynamic strength of the samples was improved(with respect to pure Mg)by 73%,116%,and 141%for the specimens compacted by Instron,DH,and SHB,*** improvement in strength was believed to be due to strengthening mechanisms,friction,adiabatic heating,and shock waves.

关键词： powder compaction B4C magnesium strain rate ultimate strength sintering

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Perfect GMR effect in gapped graphene-based ferromagnetic normal ferromagnetic junctions

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Chinese Physics B 2015年第4期24卷 405-410页

作者： Hossein Karbaschi gholam Reza Rashedi Department of Physics University of Isfahan

We investigate the quantum transport property in gapped graphene-based ferromagnetic/normal/ferromagnetic （FG/NG/FG） junctions by using the Dirac-Bogoliubov-de Gennes equation. The graphene is fabricated on SiC and BN substrates separately, so carders in FG/NG/FG structures are considered as massive relativistic particles. Transmission prob- ability, charge, and spin conductances are studied as a function of exchange energy of ferromagnets （h）, size of graphene gap, and thickness of normal graphene region （L） respectively. Using the experimental values of Fermi energy in the normal graphene part （EFN - 400 meV） and energy gap in graphene （260 meV for SiC and 50 meV for BN substrate）, it is shown that this structure can be used for both spin-up and spin-down polarized current. The latter case has different behavior of gapped FG/NG/FG from that of gapless FG/NG/FG structures. Also perfect charge giant magnetoresistance is observed in a range of E FN - mv 2 F〈h〈E FN＋mv 2 F.

关键词： graphene spin-polarized current giant magnetoresistance nanoscale structures

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A green and efficient oxidation of benzylic alcohols using H_2O_2 catalyzed by Montmorillonite-K10 supported MnCl_2

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Chinese Chemical Letters 2010年第10期21卷 1162-1164页

作者： gholam Reza Najafi Department of Chemistry Islamic Azad University

Primary and secondary benzylic alcohols were oxidized to the corresponding carbonyl compounds in good to high yields by environmentally friendly and green oxidant, H2O2 catalyzed by Montmorillonite-K10 supported manga... 详细信息

关键词： Green oxidation system Hydrogen peroxide Montmorillonite-KlO Manganese(H) chloride

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Review of electrodeposition methods for the preparation of high-entropy alloys

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International Journal of Minerals,Metallurgy and Materials 2022年第9期29卷 1683-1696页

作者： Zahra Shojaei gholam Reza Khayati Esmaeel Darezereshki Department of Materials Science and Engineering Shahid Bahonar University of KermanKerman 76135-133Iran

High-entropy alloys(HEAs)are suitable for engineering applications requiring excellent mechanical,corrosion,thermal,and magnetic *** the last decade,electrodeposition has emerged as a promising synthesis technique for *** has focused on the influence of procedure parameters on the deposition of different HEA layers and the effect of their microstructure on their corrosion and magnetic *** review of current literature provides comprehensive information on HEAs and the use of direct and pulse electrodeposition as a synthesis technique for these *** review also addresses the research gaps on HEA production via electrodeposition,such as using other ceramic particles instead of graphene oxide in composite structures based on HEAs.

关键词： high-entropy alloy electrodeposition corrosion resistance magnetic properties

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Maximum mass of a hot neutron star with a quark core

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Research in Astronomy and Astrophysics 2011年第4期11卷 471-481页

作者： Tayebeh Yazdizadeh gholam Hossein Bordbar Islamic Azad University Bafgh Branch Department of Physics Shiraz University Research Institute for Astronomy and Astrophysics of Maragha

We have considered a hot neutron star with a quark core, a mixed phase of quark-hadron matter, and a hadronic matter crust and have determined the equation of state of the hadronic phase and the quark phase. We have then found the equation of state of the mixed phase under the Gibbs conditions. Finally, we have computed the structure of a hot neutron star with a quark core and compared our results with those of the neutron star without a quark core. For the quark matter calculations, we have used the MIT bag model in which the total energy of the system is considered as the kinetic energy of the particles plus a bag constant. For the hadronic matter calculations, we have used the lowest order constrained variational formalism. Our calculations show that the results for the maximum gravitational mass of a hot neutron star with a quark core are substantially different from those of a neutron star without the quark core.

关键词： dense matter -- equation of state -- stars fundamental parameters(masses, radii, temperatures)

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Calculation of the structural properties of asymmetrical nuclear matter

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Research in Astronomy and Astrophysics 2012年第3期12卷 345-358页

作者： gholam Hossein Bordbar Hamideh Nadgaran Department of Physics Shiraz University Research Institute for Astronomy and Astrophysics of Maragha

The structural properties of asymmetrical nuclear matter have been calculated,employing the AV 18 potential for different values of proton to neutron *** calculations have also been made for the case of symmetrical nuclear matter with the UV14,AV14 and AV 18 *** our calculations,we used the lowest order constrained variational method to compute the correlation function of the system.

关键词： stars:neutron—dense matter—equation of state

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The effects of strong magnetic fields on neutron star structure:lowest order constrained variational calculations

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Research in Astronomy and Astrophysics 2013年第2期13卷 197-206页

作者： gholam Hossein Bordbar Zeinab Rezaei Department of Physics Shiraz University Center for Excellence in Astronomy and Astrophysics(CEAA-RIAAM)-Maragha

We investigate the effects of strong magnetic fields upon the large-scale properties of neutron and protoneutron stars. In our calculations, the neutron star mat- ter was approximated by pure neutron matter. Using the lowest order constrained vari- ational approach at zero and finite temperatures, and employing AV18 potential, we present the effects of strong magnetic fields on the gravitational mass, radius, and gravitational redshift of neutron and protoneutron stars. It is found that the equation of state for a neutron star becomes stiffer with an increase of magnetic field and tem- perature. This leads to larger values of the maximum mass and radius for the neutron stars.

关键词： dense matter -- equation of state -- stars magnetic fields -- stars fundamental parameters (masses, radii, temperatures)

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