ABSTRACT The present work focuses on the synthesis of a proton exchange membrane to be assembled ... more ABSTRACT The present work focuses on the synthesis of a proton exchange membrane to be assembled in a microbial fuel cell (MFC) for simultaneous bioelectricity production and domestic wastewater treatment. The indigenous membrane was prepared by ionizing irradiation-induced graft copolymerization of glycidyl methacrylate (GMA) and vinyl acetate (VAc) onto low-density polyethylene and subsequently, the prepared grafted sheets were sulfonated via epoxy ring-opening of PGMA moieties. Parameters affecting the grafting degree were investigated and the prepared membranes were characterized by investigating their structural, thermal, mechanical, and electrical properties. Some physicochemical characteristics including ion exchange capacity, sulfonation density, and proton conductivity were also evaluated. The data confirmed the success of the preparation protocol to obtain a suitable membrane for the proposed application. Moreover, the performance of the assembled MFC was thoroughly investigated through the evaluation of its electrochemical behaviour including cyclic voltammetry, electrochemical impedance spectroscopy, columbic efficiency, and wastewater treatment capability. The sulfonated LDPE-g-P(GMA-co-VAc) membrane of 80% grafting degree shows substantial removal of chemical oxygen demand up to about 90% with columbic efficiency of 10.1%, columbic recovery of 8.7%, rate of energy harvest of 2.1 C/h and power density of 2.72 W m−2. However, the use of 10 mM of KMnO4 as electron acceptor drastically increase the harvested power density to reach 356.4 W m−2 GRAPHICAL ABSTRACT
Purpose Gemcitabine (GEM) is a deoxycytidine analog chemotherapeutic drug widely used for the tre... more Purpose Gemcitabine (GEM) is a deoxycytidine analog chemotherapeutic drug widely used for the treatment of many cancers. Silver nanoparticles (AgNPs) are important nanomaterials used in the treatment of many diseases such as infectious diseases. Using gamma radiation in nanoparticle preparation is a new eco-friendly method. This study aims to evaluate the efficency of the co-treatment of gemcitabine and silver nanoparticles in hepatocellular carcinoma treatment. Methods AgNPs characterization has been done using UV- visible spectroscopy, XRD, TEM, and EDX. Firstly, the MTT cytotoxicity in vitro assay of gemcitabine, doxorubicin, and cyclophosphamide was assessed against Wi38 normal fibroblast and HepG2 HCC cell lines. Then after HCC development, rats received (10µg/g b.wt.) of AgNPs three times a week for four weeks and/or GEM (5mg/kg b.wt.) twice weekly for four weeks. Liver function enzymes were investigated. Cytochrome P450 and miR-21 genes were studied. Apoptosis was determined ...
acrylamido-2-methyl-1- propane sulfonic acid (AMPS) and Poly vinyl alcohol (PVA) were used to syn... more acrylamido-2-methyl-1- propane sulfonic acid (AMPS) and Poly vinyl alcohol (PVA) were used to synthesis a series of functional copolymer hydrogels by means of γ-radiations induced copolymerization and crosslinking. Factors affecting the hydrogel preparation were optimized. The prepared hydrogels were characterized by studying their swelling characteristics. The possibility of using the prepared hydrogel in the field of water treatment was evaluated by investigating their ability to recover some heavy metal ions from their aqueous solutions. The prepared hydrogel showed a promising capability to chelate metal ions such as: Cu +2 , Mn +2 and Ni +2 from their aqueous solutions. The obtained data show that the chelating ability of the prepared hydrogels increases by increasing the AMPS content in the hydrogel as well as the increment in the pH of the solution and the metal ion concentration. The prepared hydrogel was able to remove as much as 230 mg of Ni, 160 mg of Mn and 140 mg of Cu ...
2021 38th National Radio Science Conference (NRSC), 2021
Flexible electrodes are developed using a novel conductive ink with various ratios of graphene na... more Flexible electrodes are developed using a novel conductive ink with various ratios of graphene nanoflakes decorated with copper nanospheres as a conductive filler. These electrodes represent potential candidates for energy storage devices and solid-state batteries. The electrodes are studied by AC measurements in the range of (0.1 Hz–500 kHz). Electrical impedance measurement data have been utilized for modeling the electrical properties of the conductive ink. The fitting is done using Z-Fit software and a randomized method followed by the Levenberg-Marquardt using the Cole-Cole model. The equivalent circuits are simulated by the Z-Sim software and values are compared with the theoretical values. The error between simulation value and theoretical value was found to be minimum. The aim of the work described in the present paper is to establish an equivalent electrical circuit for the conductive ink electrodes. The best and simplest circuit representation which gives the best fitting for the Cole-Cole and Nyquist plots consists of two resistors in parallel with a capacitor in series. The values of the electrical components are tabled, and the Cole-Cole plot is fitted to the measured data.
ABSTRACT The present work focuses on the synthesis of a proton exchange membrane to be assembled ... more ABSTRACT The present work focuses on the synthesis of a proton exchange membrane to be assembled in a microbial fuel cell (MFC) for simultaneous bioelectricity production and domestic wastewater treatment. The indigenous membrane was prepared by ionizing irradiation-induced graft copolymerization of glycidyl methacrylate (GMA) and vinyl acetate (VAc) onto low-density polyethylene and subsequently, the prepared grafted sheets were sulfonated via epoxy ring-opening of PGMA moieties. Parameters affecting the grafting degree were investigated and the prepared membranes were characterized by investigating their structural, thermal, mechanical, and electrical properties. Some physicochemical characteristics including ion exchange capacity, sulfonation density, and proton conductivity were also evaluated. The data confirmed the success of the preparation protocol to obtain a suitable membrane for the proposed application. Moreover, the performance of the assembled MFC was thoroughly investigated through the evaluation of its electrochemical behaviour including cyclic voltammetry, electrochemical impedance spectroscopy, columbic efficiency, and wastewater treatment capability. The sulfonated LDPE-g-P(GMA-co-VAc) membrane of 80% grafting degree shows substantial removal of chemical oxygen demand up to about 90% with columbic efficiency of 10.1%, columbic recovery of 8.7%, rate of energy harvest of 2.1 C/h and power density of 2.72 W m−2. However, the use of 10 mM of KMnO4 as electron acceptor drastically increase the harvested power density to reach 356.4 W m−2 GRAPHICAL ABSTRACT
Purpose Gemcitabine (GEM) is a deoxycytidine analog chemotherapeutic drug widely used for the tre... more Purpose Gemcitabine (GEM) is a deoxycytidine analog chemotherapeutic drug widely used for the treatment of many cancers. Silver nanoparticles (AgNPs) are important nanomaterials used in the treatment of many diseases such as infectious diseases. Using gamma radiation in nanoparticle preparation is a new eco-friendly method. This study aims to evaluate the efficency of the co-treatment of gemcitabine and silver nanoparticles in hepatocellular carcinoma treatment. Methods AgNPs characterization has been done using UV- visible spectroscopy, XRD, TEM, and EDX. Firstly, the MTT cytotoxicity in vitro assay of gemcitabine, doxorubicin, and cyclophosphamide was assessed against Wi38 normal fibroblast and HepG2 HCC cell lines. Then after HCC development, rats received (10µg/g b.wt.) of AgNPs three times a week for four weeks and/or GEM (5mg/kg b.wt.) twice weekly for four weeks. Liver function enzymes were investigated. Cytochrome P450 and miR-21 genes were studied. Apoptosis was determined ...
acrylamido-2-methyl-1- propane sulfonic acid (AMPS) and Poly vinyl alcohol (PVA) were used to syn... more acrylamido-2-methyl-1- propane sulfonic acid (AMPS) and Poly vinyl alcohol (PVA) were used to synthesis a series of functional copolymer hydrogels by means of γ-radiations induced copolymerization and crosslinking. Factors affecting the hydrogel preparation were optimized. The prepared hydrogels were characterized by studying their swelling characteristics. The possibility of using the prepared hydrogel in the field of water treatment was evaluated by investigating their ability to recover some heavy metal ions from their aqueous solutions. The prepared hydrogel showed a promising capability to chelate metal ions such as: Cu +2 , Mn +2 and Ni +2 from their aqueous solutions. The obtained data show that the chelating ability of the prepared hydrogels increases by increasing the AMPS content in the hydrogel as well as the increment in the pH of the solution and the metal ion concentration. The prepared hydrogel was able to remove as much as 230 mg of Ni, 160 mg of Mn and 140 mg of Cu ...
2021 38th National Radio Science Conference (NRSC), 2021
Flexible electrodes are developed using a novel conductive ink with various ratios of graphene na... more Flexible electrodes are developed using a novel conductive ink with various ratios of graphene nanoflakes decorated with copper nanospheres as a conductive filler. These electrodes represent potential candidates for energy storage devices and solid-state batteries. The electrodes are studied by AC measurements in the range of (0.1 Hz–500 kHz). Electrical impedance measurement data have been utilized for modeling the electrical properties of the conductive ink. The fitting is done using Z-Fit software and a randomized method followed by the Levenberg-Marquardt using the Cole-Cole model. The equivalent circuits are simulated by the Z-Sim software and values are compared with the theoretical values. The error between simulation value and theoretical value was found to be minimum. The aim of the work described in the present paper is to establish an equivalent electrical circuit for the conductive ink electrodes. The best and simplest circuit representation which gives the best fitting for the Cole-Cole and Nyquist plots consists of two resistors in parallel with a capacitor in series. The values of the electrical components are tabled, and the Cole-Cole plot is fitted to the measured data.
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