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Coronavirus disease 2019 in a 13-year-old patient with acute lymphoblastic leukemia
Hossaini, Seyed Kamal Eshagh,Movahedi, Zahra,Hormati, Ahmad,Heydari, Hosein,Hosseini, Seyed Jalal Eshagh,Khodadust, Fatemeh,Afifian, Mahboubeh,Ahmadpour, Sajjad The Korean Pediatric Society 2021 Clinical and Experimental Pediatrics (CEP) Vol.64 No.5
Ahmed F. Al-Hossainy,Mohamed Sh. Zoromba 한국고분자학회 2021 폴리머 Vol.45 No.4
The dependence of structural and optical characteristics on the thermal annealing of a doped poly(4-phenylenediamine-co-2-aminophenol) nanostructured thin film [P4D2AP]<SUP>TF</SUP> as a doped polymer conductor nanostructured thin film was studied. [P4D2AP]<SUP>TF</SUP> was fabricated as a thin film (100 ± 2 ㎚) using the spin coating method. Various characterization methods for [P4A2AP]<SUP>TF</SUP> like Fourier-transform infrared spectroscopy (FTIR), ultraviolet-visible spectroscopic (UV-Vis), thermogravimetric analysis (TGA), and optical characteristics have been studied. The resulted X-ray diffraction (XRD) and scanning electron microscope (SEM) data have been employed to study interface composites. Density functional theory (DFT) was used for optimization by atomic orbital DFT code (DMol³) and Cambridge serial total energy package (CASTEP). Spectroscopic and structural characteristics for the thin film have confirmed the chemical composition and XRD observations revealed the same crystal structure. The fabricated film was annealed in the air for 1h at 100 and 200 ℃. XRD examination of [P4D2AP]<SUP>TF</SUP> displayed that symmetry is an orthorhombic with a space group (Pmcn). The optical characteristics demonstrated that the thin film has a relatively high absorbance of 95%. The calculated energy gaps are 2.523 eV and 2.504 eV for DFT and experimental, respectively. In addition, the optoelectrical parameters of the film have been calculated for absorption index (k(λ)), refractive index (n(λ)), dielectric constant, and optical conductivity. CASTEP simulated values are consistent with the experimental values for optical parameters of [P4A2AP]<SUP>TF</SUP>. The findings of the structural and optical characteristics described the fabricated thin film can be utilized as a candidate material for optoelectronic devices and solar cells.
Ahmed F. Al-Hossainy,Amal Y. Sediq,Safwat A. Mahmoud 대한금속·재료학회 2021 ELECTRONIC MATERIALS LETTERS Vol.17 No.2
[(Z)-2-((1,3-bis(diphenyl phosphaneyl) propylidene) amino) acetic acid/Zirconium oxide nanoparticles] composites thin film[DPPP + Gly/ZrO2]C is synthesized by utilizing physical vapor deposition (PVD) with a speed rate of 2000 rpm/30 s. Theoptimization of the samples was performed using density functional theory (DFT) by DMol3 and Cambridge Serial TotalEnergy Package (CASTEP) program. The [DPPP + Gly/ZrO2]C nanocomposite thin film is examined by different techniquesincluding scanning electron microscope (SEM), X-ray diffraction (XRD), proton nuclear magnetic resonance (1HNMR),and Fourier transform infrared (FT-IR). The [DPPP + Gly/ZrO2]C nanocomposite thin film with the thickness (150 ± 5 nm)is fabricated at optimization conditions. The optical constants (refractive index, n() , extinction coefficient, k() , dielectricconstants ( 1() and 2() ) and optical conductivity ( 1() and 2() )) for [DPPP + Gly/ZrO2]C nanocomposite thin film arecomputed and compared by using experiment and CATSTEP methods. The optical properties of simulated FTIR, XRD,and CATSTEP of the considered fiber nanocomposites are in somewhat compatible with the experimental study. The nanonanocomposite thin films present a promising result to be a good candidate for optoelectronics and solar cell applications.
Ali Dehshahri,Samira Hossaini Alhashemi,Akram Jamshidzadeh,Zahra Sabahi,Soliman Mohammadi Samani,Hossein Sadeghpour,Erfaneh Mohazabieh,Mahin Fadaei 한국고분자학회 2013 Macromolecular Research Vol.21 No.12
Interleukin-12 (IL-12) has been proposed for cancer immunotherapy due to its versatile antitumor and antiangiogenesis effects. Although cancer immunotherapy through systemic administration of IL-12 has shown antitumor effects in tumor-bearing mice, broad application of recombinant IL-12 protein has been limited by its cytotoxicity. Therefore, the use of various polycationic polymers such as polyethylenimine (PEI), polyamidoamine (PAMAM) and chitosan has been considered as an effective strategy to transfer plasmid encoding IL-12 gene into cells. In this investigation, polyplexes (polymer/pDNA complexes) were prepared using PEI, PAMAM and chitosan at different N/P ratios and their ability in transferring plasmid encoding IL-12 gene was evaluated. Furthermore,these polyplexes were characterized and compared with regarding their cytotoxicity, DNA condensation ability, particle size, zeta potential, buffering capacity and pDNA protection against enzyme degradation. The results revealed that the polyplexes formulated with 25 kDa PEI and chitosan had the highest transfection efficiencies. The highest level of IL-12 gene expression was achieved by the nanoparticles prepared by 25 kDa PEI where they could increase the level of gene expression up to 12 times compared to that of naked plasmid encoding IL-12 gene. These results suggest that 25 kDa PEI and chitosan are the best candidates for adding targeting ligands into their structures in order to create a liver targeting gene delivery system.
Investigation of mechanical behaviour of non-persistent jointed blocks under uniaxial compression
Asadizadeh, Mostafa,Moosavi, Mahdi,Hossaini, Mohammad Farouq Techno-Press 2018 Geomechanics & engineering Vol.14 No.1
This paper presents the results of an empirical study in which square rock-like blocks containing two parallel pre-existing rough non-persistent joints were subjected to uniaxial compression load. The main purpose of this study was to investigate uniaxial compressive strength and deformation modulus of jointed specimens. Response Surface Method (RSM) was utilized to design experiments and investigate the effect of four joint parameters, namely joint roughness coefficient (JRC), bridge length (L), bridge angle (${\gamma}$), and joint inclination (${\theta}$). The interaction of these parameters on the uniaxial compressive strength (UCS) and deformation modulus of the blocks was investigated as well. The results indicated that an increase in joint roughness coefficient, bridge length and bridge angle increased compressive strength and deformation modulus. Moreover, increasing joint inclination decreased the two mechanical properties. The concept of 'interlocking cracks' which are mixed mode (shear-tensile cracks) was introduced. This type of cracks can happen in higher level of JRC. Initiation and propagation of this type of cracks reduces mechanical properties of sample before reaching its peak strength. The results of the Response Surface Methodology showed that the mutual interaction of the joint parameters had a significant influence on the compressive strength and deformation modulus.