Loading...
Search for:
tajahmadi--shima
0.054 seconds
Gauge Symmetry in Renormalization Group Flow
, Ph.D. Dissertation Sharif University of Technology ; Ardalan, Farhad (Supervisor)
Abstract
Exact Renormalization Equations (ERGE) are powerful non-perturbative tools to study the dynamics of Quantum Field theories, with respect to the change of energy. Putting cut-off on momentums of the system, is the specific regularization that is used to obtain ERGEs. This regularization breaks the gauge symmetry in the case of gauge theories. So the symmetry will be lost through the energy flow as well.Finding a gauge symmetry for a regularized system is the aim of this research. Also we have investigated the related ERGEs and the behavior of symmetry through the flow
Adsorption behavior of a Gd-Based metal-organic framework toward the quercetin drug: effect of the activation condition
, Article ACS Omega ; Volume 7, Issue 45 , 2022 , Pages 41177-41188 ; 24701343 (ISSN) ; Shamloo, A ; Shojaei, A ; Sharifzadeh, M ; Sharif University of Technology
American Chemical Society
2022
Abstract
A carboxylate gadolinium-based metal-organic framework (Gd-MOF) is an exceptional candidate for magnetic resonance imaging agents, but its low drug adsorption capacity hinders this MOF from being used as a theragnostic agent. In this work, the Gd-MOF was synthesized by a simple solvothermal method. Then, different activation situations, including various solvents over different time periods, were applied to enhance the specific surface area of the synthesized MOF. Different characterization analyses such as X-ray diffraction and Brunauer-Emmett-Teller along with experimental quercetin adsorption tests were done to study the crystalline and physical properties of various activated MOFs. In...
Stability Analysis of Fractional Order Systems Described in Lur'e Structure
,
M.Sc. Thesis
Sharif University of Technology
;
Tavazoei, Mohammad Saleh
(Supervisor)
Abstract
Most of the real-world systems can be modeled as closed loop systems which are made up of a LTI subsystem in the forward path and a memoryless nonlinear subsystem in the feedback path. Such systems are called “Lur’e systems”, the name of the first who introduced these systems. Because of the generality and the wide applicability of this type of systems, studying the stability of them has been notable and interesting to many scientists for a long time. Meanwhile, in recent decades, many scientists in physics and engineering sciences have been interested in applications of the fractional order systems and as a result focused on studying the features of the fractional order systems. An...
Synthesis and Characterization of Metal-Organic Frameworks (Gadolinium Base) Carrying Quercetin Drug to Evaluate Memory Impairment in White Rats
, M.Sc. Thesis Sharif University of Technology ; Shamloo, Amir (Supervisor) ; Shojaei, Akbar (Supervisor) ; Sharifzadeh, Mohammad (Supervisor)
Abstract
One of the diseases of the central nervous system that are included in the neurodegenerative disorders and its impressive expansion among the people of the world and Iran is an alarming to us, is Alzheimer's disease. Since the cause of the disease has not yet been precisely determined, there is no definite cure for this disease yet. However, an important indicator in the disease is its early diagnosis so that the disease can be controlled and prevented from progressing in the early stages and before the degeneration of neurons. The big challenge that is observed in the diagnosis and effectiveness of drugs in this disease and any type of central nervous system disorder is the existence of the...
H2S sensing properties of added copper oxide in WO3
, Article Key Engineering Materials ; Volume 543 , March , 2013 , Pages 145-149 ; Razi Astaraei, F. (Fatemeh) ; Kashani, Sh. (shima) ; Iraji Zad, A. (Azam) ; Sharif University of Technology
2013
Abstract
We study Hydrogen sulfide gas detection properties of pure and 1% copper oxide added WO3 thin films. The spin coated deposits on alumina substrates were annealed at 500 C for 1 hour in order to improve the crystallinity of the films. The sensitivity of pure tungsten oxide is poor even at temperatures of about 100 C but the doped samples exhibit good response to H2S gas. Our data show sensitivity of about 1500 in 10 ppm diluted gas in air at 100 C. The films are sensitive to the gas even at 250 ppb (sensitivity about 2) H2S concentration at 100 C but with rather long recovery time. Crystal structure, morphology and chemical composition of samples were studied by X-Ray diffraction (XRD),...
Coordination chemistry of metal–organic frameworks: Detection, adsorption, and photodegradation of tetracycline antibiotics and beyond
, Article Coordination Chemistry Reviews ; Volume 464 , 2022 ; 00108545 (ISSN) ; Molavi, H ; Tajahmadi, S ; Rezakazemi, M ; Amini, M ; Kamkar, M ; Rojas, O. J ; Arjmand, M ; Sharif University of Technology
Elsevier B.V
2022
Abstract
Tetracyclines (TCs) are a large family of broad-spectrum antibiotics with one of the highest aquatic persistence after release from humans and animals. Hence, TCs are known to generate antibiotic resistance along with estrogenic and other toxic effects in non-target organisms. Unfortunately, the detection and removal of TCs from aqueous matrices remain challenging. For this purpose, we review metal–organic frameworks (MOFs), which have emerged as effective alternatives, given their photocatalytic and adsorptive capabilities. MOFs exhibit large interactive surface area and tunable structure and pore size for fast mass transfer and strong host–guest interactions. Herein, these and other topics...
UiO-66 metal–organic frameworks in water treatment: A critical review
, Article Progress in Materials Science ; Volume 125 , 2022 ; 00796425 (ISSN) ; Molavi, H ; Rezakazemi, M ; Tajahmadi, S ; Bahi, A ; Ko, F ; Aminabhavi, T. M ; Li, J. R ; Arjmand, M ; Sharif University of Technology
Elsevier Ltd
2022
Abstract
Metal-organic frameworks (MOFs) have recently achieved much attention to eliminating toxic pollutants because of their attractive attributes, including large specific surface area, ultra-high porosity, abundant active adsorption sites, tunable surface chemistry, well-controlled pore size distribution, and strong host–guest interactions. Among the many developed MOFs, the Zr-based MOFs, particularly the UiO-66 family, are considered extremely attractive for wastewater treatment applications. The fascinating properties of UiO-66 such as high thermal stability, superior chemical resistance towards several solvents, including benzene, acetone, different alcohols, dimethylformamide, acidic and...
Metal-organic frameworks: a promising option for the diagnosis and treatment of Alzheimer's disease
, Article Journal of Controlled Release ; Volume 353 , 2023 , Pages 1-29 ; 01683659 (ISSN) ; Molavi, H ; Ahmadijokani, F ; Shamloo, A ; Shojaei, A ; Sharifzadeh, M ; Rezakazemi, M ; Fatehizadeh, A ; Aminabhavi, T. M ; Arjmand, M ; Sharif University of Technology
Elsevier B.V
2023
Abstract
Beta-amyloid (Aβ) peptide is one of the main characteristic biomarkers of Alzheimer's disease (AD). Previous clinical investigations have proposed that unusual concentrations of this biomarker in cerebrospinal fluid, blood, and brain tissue are closely associated with the AD progression. Therefore, the critical point of early diagnosis, prevention, and treatment of AD is to monitor the levels of Aβ. In view of the potential of metal-organic frameworks (MOFs) for diagnosing and treating the AD, much attention has been focused in recent years. This review discusses the latest advances in the applications of MOFs for the early diagnosis of AD via fluorescence and electrochemiluminescence (ECL)...