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Arthrospira platensis is one of the most important cultured microalgal species in the world. Arthrospira complete dry biomass (ACDB) has been reported as an interesting feedstock for many industries, including biodiesel production. The A. platensis by-product of biodiesel production (lipid-free biomass; LFB) is a source of proteins, functional molecules, and carbohydrates, and can also be reused in several applications. The current study investigated the efficiency of ACDB and LFB in bioremediation of dye (Ismate violet 2R, IV2R) from textile effluents. In addition, the potential of ACDB and LFB loaded by IV2R as a feed for Rotifer, Brachionus plicatilis, was examined. The surface of the adsorbents was characterized by SEM, FTIR, and Raman analysis to understand the adsorption mechanism. The batch sorption method was examined as a function of adsorbent dose (0.02–0.01 g L−1), solution initial concentration (10–100 mg L−1), pH (2–10), and contact time (15–180 min). The kinetic studies and adsorption isotherm models (Freundlich, Langmuir, Tempkin, and Halsey) were used to describe the interaction between dye and adsorbents. The results concluded that the adsorption process increased with increasing ACDB and LFB dose, contact time (120 min), initial IV2R concentration (10 mg L−1), and acidity pH (2 and 6, respectively). For the elimination of industrial textile wastewater, the ACDB and LFB sorbents have good elimination ability of a dye solution by 75.7% and 61.11%, respectively. The kinetic interaction between dye and adsorbents fitted well to Langmuir, Freundlish, and Halsey models for LFB, and Langmuir for ACDB at optimum conditions with R2 > 0.9. In addition, based on the bioassay study, the ACDB and LFB loaded by IV2R up to 0.02 g L−1 may be used as feed for the marine Rotifer B. plicatilis.
Ahmed Alprol; Ahmed Heneash; Mohamed Ashour; Khamael Abualnaja; Dalal Alhashmialameer; Abdallah Mansour; Zaki Sharawy; Mouhamed Abu-Saied; Abd Abomohra. Potential Applications of Arthrospira platensis Lipid-Free Biomass in Bioremediation of Organic Dye from Industrial Textile Effluents and Its Influence on Marine Rotifer (Brachionus plicatilis). Materials 2021, 14, 4446 .
AMA StyleAhmed Alprol, Ahmed Heneash, Mohamed Ashour, Khamael Abualnaja, Dalal Alhashmialameer, Abdallah Mansour, Zaki Sharawy, Mouhamed Abu-Saied, Abd Abomohra. Potential Applications of Arthrospira platensis Lipid-Free Biomass in Bioremediation of Organic Dye from Industrial Textile Effluents and Its Influence on Marine Rotifer (Brachionus plicatilis). Materials. 2021; 14 (16):4446.
Chicago/Turabian StyleAhmed Alprol; Ahmed Heneash; Mohamed Ashour; Khamael Abualnaja; Dalal Alhashmialameer; Abdallah Mansour; Zaki Sharawy; Mouhamed Abu-Saied; Abd Abomohra. 2021. "Potential Applications of Arthrospira platensis Lipid-Free Biomass in Bioremediation of Organic Dye from Industrial Textile Effluents and Its Influence on Marine Rotifer (Brachionus plicatilis)." Materials 14, no. 16: 4446.
In this study, chemically cross-linked PVA/PAMPS membranes have been prepared to be used in direct methanol fuel cells (DMFCs). The structural properties of the resultant membrane were characterized by use FTIR and SEM. Additionally, their thermal stability was assessed using TGA. Moreover, the mechanical properties and methanol and water uptake of membrane was studied. The obtained FTIR of PVA/PAMPS membranes revealed a noticeable increase in the intensity of adsorption peaks appearing at 1062 and 1220 cm−1, which correspond to sulfonic groups with the increasing proportion of PAMPS. The thermograms of these polyelectrolyte membranes showed that their thermal stability was lower than that of PVA membrane, and total weight loss gradually decreased with increasing the PAMPS. Additionally, the functional properties and efficiency of these polyelectrolyte membranes were significantly improved with increasing PAMPS proportion in these blends. The IEC of polymer blend membrane prepared using PVA/PAMPS ratio of 1:1 was 2.64 meq/g. The same membrane recorded also a methanol permeability coefficient of 2.5 × 10−8 cm2/s and thus, its efficiency factor was 4 × 105 greater than that previously reported for the commercial polyelectrolyte membrane, Nafion® (2.6 × 105). No significant increase in this efficiency factor was observed with a further amount of PAMPS. These results proved that the PVA:PAMPS ratio of 1:1 represents the optimum mass ratio to develop the cost-effective and efficient PVA/PAMPS blend membranes for DMFCs applications.
M. Abu-Saied; Emad Soliman; Khamael Abualnaj; Eman El Desouky. Highly Conductive Polyelectrolyte Membranes Poly(vinyl alcohol)/Poly(2-acrylamido-2-methyl propane sulfonic acid) (PVA/PAMPS) for Fuel Cell Application. Polymers 2021, 13, 2638 .
AMA StyleM. Abu-Saied, Emad Soliman, Khamael Abualnaj, Eman El Desouky. Highly Conductive Polyelectrolyte Membranes Poly(vinyl alcohol)/Poly(2-acrylamido-2-methyl propane sulfonic acid) (PVA/PAMPS) for Fuel Cell Application. Polymers. 2021; 13 (16):2638.
Chicago/Turabian StyleM. Abu-Saied; Emad Soliman; Khamael Abualnaj; Eman El Desouky. 2021. "Highly Conductive Polyelectrolyte Membranes Poly(vinyl alcohol)/Poly(2-acrylamido-2-methyl propane sulfonic acid) (PVA/PAMPS) for Fuel Cell Application." Polymers 13, no. 16: 2638.
This paper presents an estimation of the adsorptive potential of multiwalled carbon nanotubes (MWCNTs) and modified poly (acrylonitrile-co-styrene) with activated carbon for the uptake of reactive red 35 (RR35) dye from aqueous solution by a batch system. MWCNT adsorbent was synthesized by encapsulation via in situ polymerization. The copolymer material of poly (acrylonitrile-styrene) P (AN-co-ST) was prepared in a ratio of 2:1 V/V by the precipitation polymerization process. The prepared composites’ properties were characterized by FTIR, SEM, Raman, mean particle size (PSA), and XRD analysis. The PSA of the copolymeric material was determined to be 450.5 and 994 nm for MWCNTs and P(AN-co-St)/AC, respectively. Moreover, the influences of different factors, for example pH (2–10), adsorbents dosage (0.005–0.04 g), contact time (5–120 min), initial dye concentration (10–50 mg L−1), and temperature (25–55 °C). The optimum values were determined to be 2 and 4 pH, 10 mg L−1 of RR35 dye, and 0.04 g of adsorbents at early contact time. Furthermore, the adsorption isotherm was studied using Langmuir, Freundlich, Tempkin, and Halsey models. Maximum capacity qmax for MWCNTS and P (AN-co-St)/AC was 256.41 and 30.30 mg g−1, respectively. The investigational kinetic study was appropriated well via a pseudo second-order model with a correlation coefficient around 0.99. Thermodynamic study displayed that the removal of RR35 is exothermic, a spontaneous and physisorption system. The adsorption efficiency reduced to around 54–55% of the RR35 after four cycles of reuse of the adsorbents at 120 min.
Khamael Abualnaja; Ahmed Alprol; M. Abu-Saied; Mohamed Ashour; Abdallah Mansour. Removing of Anionic Dye from Aqueous Solutions by Adsorption Using of Multiwalled Carbon Nanotubes and Poly (Acrylonitrile-styrene) Impregnated with Activated Carbon. Sustainability 2021, 13, 7077 .
AMA StyleKhamael Abualnaja, Ahmed Alprol, M. Abu-Saied, Mohamed Ashour, Abdallah Mansour. Removing of Anionic Dye from Aqueous Solutions by Adsorption Using of Multiwalled Carbon Nanotubes and Poly (Acrylonitrile-styrene) Impregnated with Activated Carbon. Sustainability. 2021; 13 (13):7077.
Chicago/Turabian StyleKhamael Abualnaja; Ahmed Alprol; M. Abu-Saied; Mohamed Ashour; Abdallah Mansour. 2021. "Removing of Anionic Dye from Aqueous Solutions by Adsorption Using of Multiwalled Carbon Nanotubes and Poly (Acrylonitrile-styrene) Impregnated with Activated Carbon." Sustainability 13, no. 13: 7077.
Anise oil was prepared in its nanoemulsion form to facilitate the penetration of microbial walls, causing microbe mortality. The penetration occurred easily owing to the reduction in its size (nm). Nanoemulsions with different concentrations of anise oil were prepared using lecithin as an emulsifying agent with the aid of an ultra-sonification process. Their morphological and chemical properties were then characterized. The promising constituents were l-Menthone (11.22%), Gurjunene (6.78%), Geranyl acetate (4.03%), Elemene (3.93%), Geranyl tiglate (3.53%), geraniol (3.48%), linalool (0.17%) as well as camphene (0.12%). Different concentrations of prepared anise oil in micro and nanoemulsions were tested as antimicrobial agents against Gram-positive bacteria (Staphylococcus aureus), Gram-negative bacteria (Escherichia coli), yeast (Candida albicans) and fungi (Asperigillus niger). The findings illustrated that the anise oil-based nanoemulsion exhibited better results. Different biochemical and biological evaluations of anise oil nanoemulsions were conducted, including determining killing times, antioxidant activities (using three different methods), and total phenolics. A trial to estimate the mode of action of anise oil-based nanoemulsion as an antimicrobial agent against S. aureus and C. albicans was performed via studying the release of reducing sugars and protein and conducting scanning electron microscopy.
Ola Abu Ali; Mehrez El-Naggar; Mohamed Abdel-Aziz; Dalia Saleh; Mohamed. Abu-Saied; Wael El-Sayed. Facile Synthesis of Natural Anise-Based Nanoemulsions and Their Antimicrobial Activity. Polymers 2021, 13, 2009 .
AMA StyleOla Abu Ali, Mehrez El-Naggar, Mohamed Abdel-Aziz, Dalia Saleh, Mohamed. Abu-Saied, Wael El-Sayed. Facile Synthesis of Natural Anise-Based Nanoemulsions and Their Antimicrobial Activity. Polymers. 2021; 13 (12):2009.
Chicago/Turabian StyleOla Abu Ali; Mehrez El-Naggar; Mohamed Abdel-Aziz; Dalia Saleh; Mohamed. Abu-Saied; Wael El-Sayed. 2021. "Facile Synthesis of Natural Anise-Based Nanoemulsions and Their Antimicrobial Activity." Polymers 13, no. 12: 2009.
In this study, a polymeric (acrylonitrile-co-styrene) P(AN-co-St) composite was impregnated with adsorbents, such as sulfonated and multiwall carbon nanotubes (MWCNTs), to increase the adsorptive characteristics of the nanocomposite upon the removal of methyl orange (MO) dye under different conditions. A novel nanocomposite copolymer mixture of P(AN-co-St) and SP(AN-co-St) was used. MWCNTs were prepared by a low-cost chemical vapor deposition (CVD) process. Variation in MO adsorption onto the three nanocomposites was examined in an aqueous solution via the batch technique with respect to contact time, initial MO concentration, adsorbent dosage, pH, and temperature. The surface of the nanocomposites was characterized by a scanning electron microscope (SEM), particle size distribution (PSD), Fourier transform infrared (FTIR), and Raman analysis. The experimental data showed that the efficiency of P(AN-co-St)/ MWCNT removal increased under the conditions of an acidic pH (3 and 5) with an agitation speed of 140 rpm, a sorbent weight of 0.01 g, and 20 mg of initial dye. The maximum sorption capacities were 121.95, 48.78, and 47.84 mg g−1 for the P(AN-co-St)/ MWCNTs, SP(AN-co-St), and P(AN-co-St) composites, respectively, as assessed by the Langmuir model. Additional isotherm models, such as the Freundlich, Temkin, and Halsey models, were used to examine the experimental data. A pseudo-second-order model was found to be more fitting for describing the sorption.
Khamael Abualnaja; Ahmed Alprol; M. Abu-Saied; Abdallah Mansour; Mohamed Ashour. Studying the Adsorptive Behavior of Poly(Acrylonitrile-co-Styrene) and Carbon Nanotubes (Nanocomposites) Impregnated with Adsorbent Materials towards Methyl Orange Dye. Nanomaterials 2021, 11, 1144 .
AMA StyleKhamael Abualnaja, Ahmed Alprol, M. Abu-Saied, Abdallah Mansour, Mohamed Ashour. Studying the Adsorptive Behavior of Poly(Acrylonitrile-co-Styrene) and Carbon Nanotubes (Nanocomposites) Impregnated with Adsorbent Materials towards Methyl Orange Dye. Nanomaterials. 2021; 11 (5):1144.
Chicago/Turabian StyleKhamael Abualnaja; Ahmed Alprol; M. Abu-Saied; Abdallah Mansour; Mohamed Ashour. 2021. "Studying the Adsorptive Behavior of Poly(Acrylonitrile-co-Styrene) and Carbon Nanotubes (Nanocomposites) Impregnated with Adsorbent Materials towards Methyl Orange Dye." Nanomaterials 11, no. 5: 1144.
Series of nanofibrous composites of polycaprolactone (PCL) were fabricated in different compositions of modified hydroxyapatite (HAP). The encapsulated HAP was co-doped with Ag/vanadate ions at different Ag contributions. XRD and FTIR techniques confirmed the powder and fibrous phase formation. Further, the morphological and mechanical behaviors of the electrospun nanofibrous scaffolds containing hydroxyapatite were investigated. The nanofibrous phases were biologically evaluated via studying contact angle, antibacterial, cell viability, and in vitro growth of human fibroblasts cell line (HFB4). It is obvious that silver ions cause gradual deviation in powder grains from wafer-like to cloudy grains. The maximum height of the roughness (Rt) ranged from 902.0 to 956.9 nm, while the valley depth of the roughness (Rv) ranged from 308.3 to 442.8 nm, for the lowest and the highest additional Ag ions for powdered phases. Moreover, the highest contribution of silver through the nanofibrous phases leads to the formation of lowest filaments size ranged from 0.07 to 0.53 µm. Further, the fracture strength was increased exponentially from 2.51 ± 0.35 MPa at zero concentration of silver ions up to 4.23 ± 0.64 MPa at 0.6 Ag/[email protected] The fibrous phases were biologically evaluated in terms of antibacterial, cell viability, and in vitro growth of human fibroblasts cell line (HFB4). The nanofibrous composition of 0.8 Ag/[email protected] reached the maximum potential against E. coli and S. aureus and recorded 20.3 ± 1.1 and 19.8 ± 1.2 mm, respectively. This significant performance of the antibacterial activity and cell viability of co-doped HAP distributed through PCL could recommend these compositions for more research in biological applications, including wound healing.
Hany El-Hamshary; Mehrez El-Naggar; Ayman El-Faham; M. Abu-Saied; M. Ahmed; Mosaed Al-Sahly. Preparation and Characterization of Nanofibrous Scaffolds of Ag/Vanadate Hydroxyapatite Encapsulated into Polycaprolactone: Morphology, Mechanical, and In Vitro Cells Adhesion. Polymers 2021, 13, 1327 .
AMA StyleHany El-Hamshary, Mehrez El-Naggar, Ayman El-Faham, M. Abu-Saied, M. Ahmed, Mosaed Al-Sahly. Preparation and Characterization of Nanofibrous Scaffolds of Ag/Vanadate Hydroxyapatite Encapsulated into Polycaprolactone: Morphology, Mechanical, and In Vitro Cells Adhesion. Polymers. 2021; 13 (8):1327.
Chicago/Turabian StyleHany El-Hamshary; Mehrez El-Naggar; Ayman El-Faham; M. Abu-Saied; M. Ahmed; Mosaed Al-Sahly. 2021. "Preparation and Characterization of Nanofibrous Scaffolds of Ag/Vanadate Hydroxyapatite Encapsulated into Polycaprolactone: Morphology, Mechanical, and In Vitro Cells Adhesion." Polymers 13, no. 8: 1327.
A modified composite membranes (PVA/SiOH/SiOC) were made via solution-casting process using different 1:1, 1:2, 1:3 and 1:4 volume ratios of polyvinyl alcohol (PVA):methoxytrimethylsilane (MTMS). Moreover, FT-infrared and energy-dispersive X-ray spectroscopy (EDX) were mesured to account for the network structural rearrangements involving silicon within PVA matrices. The addition of MTMS has improved the thermal and mechanical properties of the composite membranes as compared to pristine PVA. In addition, the crystallinity and the morphological changes of PVA/MTMS composites was studied using X-ray diffraction (XRD) and scanning electron microscope (SEM), respectively. Three structures were suggested based on trimethyl silanol (I) wet out condensation (II and III) with the dopped PVA followed by and H-bonding interactions (IV). The outcomes of B3LYP/6-31G(d) frequency calculations favors a three-dimensional SiOC linked network (III). Nevertheless, EDX reveals, the 3D SiOC links are not observed on the surface of composite membranes, however, is found dominant in the bulk, [(CH3)3SiOCH2CH2CH2O]n. Moreover, the solubility, density, and refractive index of the synthesized composites were measured and found depended on the ratio of PVA in the composite membranes. The current results are compared with that published earlier including dimethoxydimethylsilane at the same conditions.
Alaa Fahmy; Mohamed Abou-Saied; Hisham Helaly; Farid El-Dessoki; Tarek A. Mohamed. Novel PVA/Methoxytrimethylsilane elastic composite membranes: preparation, characterization and DFT computation. Journal of Molecular Structure 2021, 1235, 130173 .
AMA StyleAlaa Fahmy, Mohamed Abou-Saied, Hisham Helaly, Farid El-Dessoki, Tarek A. Mohamed. Novel PVA/Methoxytrimethylsilane elastic composite membranes: preparation, characterization and DFT computation. Journal of Molecular Structure. 2021; 1235 ():130173.
Chicago/Turabian StyleAlaa Fahmy; Mohamed Abou-Saied; Hisham Helaly; Farid El-Dessoki; Tarek A. Mohamed. 2021. "Novel PVA/Methoxytrimethylsilane elastic composite membranes: preparation, characterization and DFT computation." Journal of Molecular Structure 1235, no. : 130173.
Carbazole dyes applied in dye-sensitized solar cells (DSSCs) are essential class of organic molecules. Two novel organic dyes DRA-BDC and DTB-BDC including rhodanine-3-acetic acid/thiobarbituric acid as electron acceptors and N, N-butyl dicarbazole structural as electron donor/spacer have been designed as photosensitizers for DSSCs. Both prepared dyes were characterized by IR, 1H-NMR, 13C-NMR, mass spectroscopy and CHN analysis. Results of photophysical properties, the UV- Visible spectra of both dyes DRA-BDC and DTB-BDC showed the higher absorption peaks at 440 and 370 nm, respectively. Also, for electrochemical properties, both structures showed more +ve ground state oxidation potential than I−/I−3, and more –ve excited state oxidation potential than the conduction band edge of the semiconductor. However, the high performance of power-conversion was observed on the DSSCs device with DRA-BDC (η = 1.16 %) compared with DTB-BDC dye. Also, DRA-BDC recorded an open circuit voltage (VOC) = 589 mV, short circuit current density (JSC) = 2.46 mA/cm2 and fill factor (FF) = 0.79 under simulated AM 1.5G irradiation (100 mW/cm2). For the theoretical studies included polarizabilities, optimization geometry, conformational analysis, and photovoltaic analysis based on frontier orbital analysis energy evaluated by using density functional theory model (DFT) with B3LYP/6-311functional basis set.
Moustafa S. Abusaif; M. Fathy; M.A. Abu-Saied; Ahmed A. Elhenawy; A.B. Kashyout; Mohamed R. Selim; Yousry A. Ammar. New carbazole-based organic dyes with different acceptors for dye-sensitized solar cells: Synthesis, characterization, dssc fabrications and density functional theory studies. Journal of Molecular Structure 2020, 1225, 129297 .
AMA StyleMoustafa S. Abusaif, M. Fathy, M.A. Abu-Saied, Ahmed A. Elhenawy, A.B. Kashyout, Mohamed R. Selim, Yousry A. Ammar. New carbazole-based organic dyes with different acceptors for dye-sensitized solar cells: Synthesis, characterization, dssc fabrications and density functional theory studies. Journal of Molecular Structure. 2020; 1225 ():129297.
Chicago/Turabian StyleMoustafa S. Abusaif; M. Fathy; M.A. Abu-Saied; Ahmed A. Elhenawy; A.B. Kashyout; Mohamed R. Selim; Yousry A. Ammar. 2020. "New carbazole-based organic dyes with different acceptors for dye-sensitized solar cells: Synthesis, characterization, dssc fabrications and density functional theory studies." Journal of Molecular Structure 1225, no. : 129297.
In this study case, the good film-forming and structural properties of chitosan (CTS) impelled us to employ them for developing polyelectrolyte membrane (PEMs). To functionalize the resultant PEMs, poly-2-acrylamido-2-methylpropane sulfonic acid (PAMPS) was blended with chitosan in different proportions. The structural and physical properties of CTS/PAMPS membranes were investigated using Raman scattering and FT-IR spectrometers, scanning electron microscope (SEM), thermos gravimetric analyzer (TGA), universal testing machine and water contact angle meter. Furthermore, water-uptake and ion exchange capacity (IEC), methanol permeability and efficiency of such membranes were measured. Ion exchange capacity of CTS/PAMPS membranes was increased with increasing the proportion of PAMPS to reach its maximum of 1.85 meq/g comparing with 0.9 meq/g for Nafion®117. Methanol permeability of the resultant blend-based membranes at CTS/PAMPS ratio of 2:1 was 9 × 10-7 cm2/sec comparing with 3.39 × 10-6 cm2/sec for Nafion®117. Moreover, CTS/PAMPS blend membranes exhibited efficiency factors higher than that of Nafion®117. Such results enhance the potential feasibility of CTS/PAMPS membranes for direct methanol fuel cell application.
M.A. Abu-Saied; E.A. Soliman; E.A.Al Desouki. Development of Proton Exchange Membranes Based on Chitosan Blended with Poly (2-Acrylamido-2-Methylpropane Sulfonic Acid) for Fuel Cells applications. Materials Today Communications 2020, 25, 101536 .
AMA StyleM.A. Abu-Saied, E.A. Soliman, E.A.Al Desouki. Development of Proton Exchange Membranes Based on Chitosan Blended with Poly (2-Acrylamido-2-Methylpropane Sulfonic Acid) for Fuel Cells applications. Materials Today Communications. 2020; 25 ():101536.
Chicago/Turabian StyleM.A. Abu-Saied; E.A. Soliman; E.A.Al Desouki. 2020. "Development of Proton Exchange Membranes Based on Chitosan Blended with Poly (2-Acrylamido-2-Methylpropane Sulfonic Acid) for Fuel Cells applications." Materials Today Communications 25, no. : 101536.
An ureolytic bacteria that forming calcite and enhance soil stability was isolated. Water retention of soils was increased by addition of hydrogel polymer.
Tarek H. Taha; Mohamed S. Elnouby; M. A. Abu-Saied; Saad Alamri. Tested functionalization of alginate-immobilized ureolytic bacteria for improvement of soil biocementation and maximizing water retention. RSC Advances 2020, 10, 21350 -21359.
AMA StyleTarek H. Taha, Mohamed S. Elnouby, M. A. Abu-Saied, Saad Alamri. Tested functionalization of alginate-immobilized ureolytic bacteria for improvement of soil biocementation and maximizing water retention. RSC Advances. 2020; 10 (36):21350-21359.
Chicago/Turabian StyleTarek H. Taha; Mohamed S. Elnouby; M. A. Abu-Saied; Saad Alamri. 2020. "Tested functionalization of alginate-immobilized ureolytic bacteria for improvement of soil biocementation and maximizing water retention." RSC Advances 10, no. 36: 21350-21359.
Proton-conducting and methanol barrier properties of the proton exchange membrane (PEM), as well as the high cost of direct methanol fuel cell (DMFC) components, are the key determinants of the performance and commercialization of DMFCs. Therefore, this study aimed to develop cost- and performance-effective membranes based on sulphonated poly (vinyl chloride) (SPVC)/poly (2-acrylamido-2-methyl-1-propane sulphonic acid) (PAMPS) blends. Such membranes have been simply prepared by blending SPVC and PAMPS solutions, followed by solvent evaporation via casting. Interaction of SPVC with PAMPS was confirmed by different characterization techniques such as Fourier Transform Infra-red (FTIR) and Raman scattering spectroscopy in which the two characteristic absorption bands of sulfonic groups appeared at 1093 and 1219 cm−1 additionally, strong peaks at around 1656 cm−1 attributed to vibration of amide groups of PAMPS portion in the polymer blend. Furthermore, the interaction of SPVC with PAMPS improves the thermal properties along with ion exchange capacity in turn decreasing the methanol permeability through the membrane in comparison with the SPVC membrane. The IEC of PVC and Nafion 117 membranes were 1.25, 0.91 meq/g; respectively. And the maximum water uptake of PVC and Nafion 117 membranes were 75 and 65.44%; respectively. Methanol permeability value of 7.7 × 10−7 cm2/s which was noticeably lower than the corresponding value recorded for Nafion® (3.39 × 10−6 cm2/s). Therefore, these fabricated membranes can be considered a low-cost efficient candidate for use in DMFC, especially for its capability to resolve the methanol cross-over issue.
M.A. Abu-Saied; E.A. El-Desouky; E.A. Soliman; G. Abd El-Naim. Novel sulphonated poly (vinyl chloride)/poly (2-acrylamido-2-methylpropane sulphonic acid) blends-based polyelectrolyte membranes for direct methanol fuel cells. Polymer Testing 2020, 89, 106604 .
AMA StyleM.A. Abu-Saied, E.A. El-Desouky, E.A. Soliman, G. Abd El-Naim. Novel sulphonated poly (vinyl chloride)/poly (2-acrylamido-2-methylpropane sulphonic acid) blends-based polyelectrolyte membranes for direct methanol fuel cells. Polymer Testing. 2020; 89 ():106604.
Chicago/Turabian StyleM.A. Abu-Saied; E.A. El-Desouky; E.A. Soliman; G. Abd El-Naim. 2020. "Novel sulphonated poly (vinyl chloride)/poly (2-acrylamido-2-methylpropane sulphonic acid) blends-based polyelectrolyte membranes for direct methanol fuel cells." Polymer Testing 89, no. : 106604.
The wide distribution of infections-related pathogenic microbes is almost related to the contamination of food and/or drinking water. The current applied treatments face some limitations. In the current study, k-carrageenan polymer was used as supporting material for the proper/unreleased silver nanoparticles that showed strong antimicrobial activity against six pathogenic bacteria and yeast. The bio-extract of the pupa of green bottle fly was used as the main agent for the synthesis of silver nanoparticles. The qualitative investigation of biologically synthesized silver nanoparticles was determined using UV-Vis spectrophotometric analysis; however, the size of nanoparticles was in range of 30–100 nm, as confirmed by scanning electron microscopy (SEM), transmission electron microscopy (TEM), and particle size analyzer. The proper integration of silver nanoparticles into the polymeric substrate was also characterized through fourier transform infrared (FT-IR), thermogravimetric analysis (TGA), SEM, and tensile strength. The antimicrobial activity of k-carrageenan/silver nanoparticles against Gram positive, Gram negative, and yeast pathogens was highly effective. These results indicate the probable exploitation of the polymeric/nanoparticles composite as an extra stage in water purification systems in homes or even at water treatment plants.
M. A. Abu-Saied; Mohamed Elnouby; Tarek Taha; Muhammad El-Shafeey; Ali G. AlShehri; Saad Alamri; Huda Alghamdi; Ali Shati; Sulaiman Alrumman; Mohamed Al-Kahtani; Mahmoud Moustafa. Potential Decontamination of Drinking Water Pathogens through k-Carrageenan Integrated Green Bottle Fly Bio-Synthesized Silver Nanoparticles. Molecules 2020, 25, 1936 .
AMA StyleM. A. Abu-Saied, Mohamed Elnouby, Tarek Taha, Muhammad El-Shafeey, Ali G. AlShehri, Saad Alamri, Huda Alghamdi, Ali Shati, Sulaiman Alrumman, Mohamed Al-Kahtani, Mahmoud Moustafa. Potential Decontamination of Drinking Water Pathogens through k-Carrageenan Integrated Green Bottle Fly Bio-Synthesized Silver Nanoparticles. Molecules. 2020; 25 (8):1936.
Chicago/Turabian StyleM. A. Abu-Saied; Mohamed Elnouby; Tarek Taha; Muhammad El-Shafeey; Ali G. AlShehri; Saad Alamri; Huda Alghamdi; Ali Shati; Sulaiman Alrumman; Mohamed Al-Kahtani; Mahmoud Moustafa. 2020. "Potential Decontamination of Drinking Water Pathogens through k-Carrageenan Integrated Green Bottle Fly Bio-Synthesized Silver Nanoparticles." Molecules 25, no. 8: 1936.
Using of sensors in a variety of applications by various bioreceptor using transducers with different detection mechanisms. Nanomaterials have attracted great interest in improving and manufacture of biosensors. Functionalized nanomaterials improve the detection and the strength of different signals. Abstract Due to the harmful effects of some biological and environmental hazard, many studies were directed to investigate advanced devices with high sensitive and fast detection. Biosensor is a device by which a readable information was produced at interaction of biological molecule with an electronic ingredient and has been highly developed to be used in a variety of applications using different bioreceptor, using transducers with different detection mechanisms and the most attractive use of nanomaterials in improving the performance of nanobiosensors. Nanomaterials have attracts great interest in improving and manufacture of biosensors. Where, the marked surface area of the nanosize particles enhances the immobilization of various biological molecules on its surface. These functionalized nanomaterials improve the detection and the strength of different signals. Moreover, this review discusses some types of biosensors that used in different biological and environmental applications and the effect of the nanomaterials on the enhancement of their performance. Download : Download high-res image (87KB)Download : Download full-size image
A.A. Nayl; A.I. Abd-Elhamid; Ahmed Y. El-Moghazy; Mohamed Hussin; M.A. Abu-Saied; Ahmed A. El-Shanshory; Hesham M.A. Soliman. The nanomaterials and recent progress in biosensing systems: A review. Trends in Environmental Analytical Chemistry 2020, 26, e00087 .
AMA StyleA.A. Nayl, A.I. Abd-Elhamid, Ahmed Y. El-Moghazy, Mohamed Hussin, M.A. Abu-Saied, Ahmed A. El-Shanshory, Hesham M.A. Soliman. The nanomaterials and recent progress in biosensing systems: A review. Trends in Environmental Analytical Chemistry. 2020; 26 ():e00087.
Chicago/Turabian StyleA.A. Nayl; A.I. Abd-Elhamid; Ahmed Y. El-Moghazy; Mohamed Hussin; M.A. Abu-Saied; Ahmed A. El-Shanshory; Hesham M.A. Soliman. 2020. "The nanomaterials and recent progress in biosensing systems: A review." Trends in Environmental Analytical Chemistry 26, no. : e00087.
This work is concerned with the bio-exfoliation of graphite using a soil bacterium.
Tarek H. Taha; Mohamed S. Elnouby; M. A. Abu-Saied; Saad Alamri. The green exfoliation of graphite waste and its suitability for biosensor applications. RSC Advances 2020, 10, 9347 -9355.
AMA StyleTarek H. Taha, Mohamed S. Elnouby, M. A. Abu-Saied, Saad Alamri. The green exfoliation of graphite waste and its suitability for biosensor applications. RSC Advances. 2020; 10 (16):9347-9355.
Chicago/Turabian StyleTarek H. Taha; Mohamed S. Elnouby; M. A. Abu-Saied; Saad Alamri. 2020. "The green exfoliation of graphite waste and its suitability for biosensor applications." RSC Advances 10, no. 16: 9347-9355.
The presence of dyes in industrial wastewater is a serious problem that hazards the surrounding environment.
A. A. Nayl; A. I. Abd-Elhamid; M. A. Abu-Saied; Ahmed A. El-Shanshory; Hesham M. A. Soliman; Magda A. Akl; H. F. Aly. A novel method for highly effective removal and determination of binary cationic dyes in aqueous media using a cotton–graphene oxide composite. RSC Advances 2020, 10, 7791 -7802.
AMA StyleA. A. Nayl, A. I. Abd-Elhamid, M. A. Abu-Saied, Ahmed A. El-Shanshory, Hesham M. A. Soliman, Magda A. Akl, H. F. Aly. A novel method for highly effective removal and determination of binary cationic dyes in aqueous media using a cotton–graphene oxide composite. RSC Advances. 2020; 10 (13):7791-7802.
Chicago/Turabian StyleA. A. Nayl; A. I. Abd-Elhamid; M. A. Abu-Saied; Ahmed A. El-Shanshory; Hesham M. A. Soliman; Magda A. Akl; H. F. Aly. 2020. "A novel method for highly effective removal and determination of binary cationic dyes in aqueous media using a cotton–graphene oxide composite." RSC Advances 10, no. 13: 7791-7802.
A novel mixed matrix composite has been prepared using solution-casting method at different volume concentrations of polyvinyl alcohol; PVA (50, 67, 75 and 80%) and fixed amount of dimethoxydimethylsilane in air atmosphere. The hydrolyzed dimethyldisilanol acts as in-situ cross linker through a wet-out condensation between the hydroxyl moieties of SiOH and PVAOH. Such process improves the mechanical properties of composite membranes as compared to pristine PVA which has been determined as function of varied membrane components to evaluate the structure/property relationships. Furthermore, DFT (B3LYP)/6-31G(d) geometry and frequency computations were carried out for the suggested dimeric PVA structures via 1,3-diol linkage followed by condensation and hydrogen bonding interaction. Vibrational interpretations of composite membranes were proposed based on the computed wavenumbers, Cartesian coordinates displacements for the suggested hydrolyzed products involving the dominant PVA/SiOH/SiOC/SiOSi functional groups compared with those given in literatures. FTIR and EDX provide clear evidences for incorporating silicon to 3D network. Meanwhile, the infrared de-convoluted spectral interpretations ensure 17–30% cross-linked SiOC within the network of composite membranes.
Alaa Fahmy; Tarek A. Mohamed; Mohamed Abu-Saied; Hisham Helaly; Farid El-Dossoki. Structure/property relationship of polyvinyl alcohol/dimethoxydimethylsilane composite membrane: Experimental and theoretical studies. Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 2019, 228, 117810 .
AMA StyleAlaa Fahmy, Tarek A. Mohamed, Mohamed Abu-Saied, Hisham Helaly, Farid El-Dossoki. Structure/property relationship of polyvinyl alcohol/dimethoxydimethylsilane composite membrane: Experimental and theoretical studies. Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy. 2019; 228 ():117810.
Chicago/Turabian StyleAlaa Fahmy; Tarek A. Mohamed; Mohamed Abu-Saied; Hisham Helaly; Farid El-Dossoki. 2019. "Structure/property relationship of polyvinyl alcohol/dimethoxydimethylsilane composite membrane: Experimental and theoretical studies." Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 228, no. : 117810.
A poly(vinyl chloride) (PVC) membrane was exposed to atmospheric-pressure dielectric barrier discharge and subsequently wet-chemically grafted with poly(acrylic acid) (PAA) and then consumed with poly(ethyleneimine) (PEI). The thus modified membrane was characterized by measurement of the static water contact angle, by scanning electron microscopy, infrared spectroscopy (ATR-FTIR), thermogravimetry (TGA) and electrolytic responses. The TGA favors a thermally stable grafted PVC membrane. The ATR-FTIR revealed the existence of an ultra-thin PAA layer grafted onto the surface of the plasma-modified PVC membrane. The ion exchange capacity measurement of the grafted poly(vinyl chloride) (PVC–PAA) sample was close to that of additionally wet-chemically aminated with PEI for 12 h or more (PVC–PAA–PEI). It means that PVC–PAA membranes do not need necessarily further modifications. As concomitant helpful effect, it was observed that the swelling degree of the PVC membrane was reduced after plasma exposure due to plasma-induced crosslinking.
Mohamed Abu-Saied; Alaa Fahmy; Nasser Morgan; Walid Qutop; Hassan Abdelbary; Jörg Florian Friedrich. Enhancement of Poly(vinyl chloride) Electrolyte Membrane by Its Exposure to an Atmospheric Dielectric Barrier Discharge Followed by Grafting with Polyacrylic Acid. Plasma Chemistry and Plasma Processing 2019, 39, 1499 -1517.
AMA StyleMohamed Abu-Saied, Alaa Fahmy, Nasser Morgan, Walid Qutop, Hassan Abdelbary, Jörg Florian Friedrich. Enhancement of Poly(vinyl chloride) Electrolyte Membrane by Its Exposure to an Atmospheric Dielectric Barrier Discharge Followed by Grafting with Polyacrylic Acid. Plasma Chemistry and Plasma Processing. 2019; 39 (6):1499-1517.
Chicago/Turabian StyleMohamed Abu-Saied; Alaa Fahmy; Nasser Morgan; Walid Qutop; Hassan Abdelbary; Jörg Florian Friedrich. 2019. "Enhancement of Poly(vinyl chloride) Electrolyte Membrane by Its Exposure to an Atmospheric Dielectric Barrier Discharge Followed by Grafting with Polyacrylic Acid." Plasma Chemistry and Plasma Processing 39, no. 6: 1499-1517.
The world is currently suffering substantially from the over-use of fossil fuels and worsening global climate change. The recycling and conversion of various types of biomass wastes for production of bio-ethanol have recently received increasing interest around the world to overcome the upcoming fuel shortage. In this work, the cellulosic fibers from textile industry wastes were used as biomass resource for liberation of glucose units. The cellulosic fibers were treated by some acids or alkali reagents followed by application of ultrasonic waves or autoclaving or microwave radiation as green technologies for improving hydrolysis rate. The cellulase enzyme from Trichoderma reesei was later applied to increase the concentration of glucose yield to reach 1133.33 mg/dl. Glucose units were then fermented by yeast isolate that was identified by amplification and sequencing of 18S rRNA as Pichia kluyveri (accession number MF184994). The parameters of pH, temperature, inoculum size, and aerobic/anaerobic conditions were optimized revealing that cultivation of 10% of the yeast isolate at pH 5 and 25 °C under anaerobic conditions are the ideal parameters for higher bio-ethanol production rates (33.9%). The produced bio-ethanol compared with standard 25% ethanol was separated by using amicon cell ultra-filtration that contains poly acrylonitrile co methyl acrylate membrane at different nitrogen pressures. The membrane was characterized by SEM, FTIR, Raman spectroscopy, TGA, IEC, and tensile strength measurement. The hydrophilicity/hydrophobicity of the prepared membrane was investigated using contact angle and water/ethanol uptake. Finally, the prepared polymeric membrane integrated amicon cell succeeded to increase the prepared ethanol concentration from 194.25 to 478.74 mg/ml which approximately elevated from 25 to 61.6%. On the other hand, the bio-ethanol concentration was increased from 256.41 to 540.82 mg/ml which approximately elevated from 33.9 to 69.6%. The obtaining bioethanol concentration is considered cost efficient, where the combined fermentation and separation processes succeeded to convert one ton of cellulosic fiber wastes into 105 l of bioethanol with approximate estimation cost of 103.9$ per liter through lab scale study.
M. A. Abu-Saied; Tarek H. Taha; Elsayed M. Elnaggar; Ranya A. Amer; A. E. Mansy; Gamal M. Elkady. Green production of bio-ethanol from cellulosic fiber waste and its separation using polyacrylonitrile-co-poly methyl acrylate membrane. Cellulose 2018, 25, 6621 -6644.
AMA StyleM. A. Abu-Saied, Tarek H. Taha, Elsayed M. Elnaggar, Ranya A. Amer, A. E. Mansy, Gamal M. Elkady. Green production of bio-ethanol from cellulosic fiber waste and its separation using polyacrylonitrile-co-poly methyl acrylate membrane. Cellulose. 2018; 25 (11):6621-6644.
Chicago/Turabian StyleM. A. Abu-Saied; Tarek H. Taha; Elsayed M. Elnaggar; Ranya A. Amer; A. E. Mansy; Gamal M. Elkady. 2018. "Green production of bio-ethanol from cellulosic fiber waste and its separation using polyacrylonitrile-co-poly methyl acrylate membrane." Cellulose 25, no. 11: 6621-6644.
It is well known that the pathogenic multidrug resistant microbes are highly distributed and transferred to human through contaminated food and water. Advanced technologies have been developed for controlling these microbes using synthesized nanoparticles. In this study, bio-synthesized silver nanoparticles were prepared, characterized and integrated with two synthetic and natural polymers. The polymers-silver nanoparticles were characterized using SEM, FTIR and mechanical properties of the membrane synthesized from either polymers with/without nanosilver. Both of pathogenic bacteria and yeast were tested for their resistance against 10 different antibiotics. The pathogens showed high resistance against 9 antibiotics and only one was recorded as potent. The cytotoxicity of nanosilver integrated polymers were tested against Hamster kidney cells and Human skin fibroblast cells, and the non-cytotoxic dose was checked for its antimicrobial activity against the selected pathogens. The obtained results in this study confirm that the using of the nanomaterials in safe doses could be a good substitution for biogenic antibiotics and chemicals used in water treatment. Moreover, the beads which were used in this study could be lasts for long period in water treatment station with high antibacterial capacity, in addition, it can be gathered easily at the end of the run.
M.A. Abu-Saied; Tarek H. Taha; Nehal M. El-Deeb; Elsayed Hafez. Polyvinyl alcohol/Sodium alginate integrated silver nanoparticles as probable solution for decontamination of microbes contaminated water. International Journal of Biological Macromolecules 2018, 107, 1773 -1781.
AMA StyleM.A. Abu-Saied, Tarek H. Taha, Nehal M. El-Deeb, Elsayed Hafez. Polyvinyl alcohol/Sodium alginate integrated silver nanoparticles as probable solution for decontamination of microbes contaminated water. International Journal of Biological Macromolecules. 2018; 107 ():1773-1781.
Chicago/Turabian StyleM.A. Abu-Saied; Tarek H. Taha; Nehal M. El-Deeb; Elsayed Hafez. 2018. "Polyvinyl alcohol/Sodium alginate integrated silver nanoparticles as probable solution for decontamination of microbes contaminated water." International Journal of Biological Macromolecules 107, no. : 1773-1781.
Novel absorbents for the removal of Cu and Ni ions from aqueous solutions were prepared from solution cast sulfated chitosan/polyvinyl alcohol membranes (SCS/PVA) and their properties were investigated. FTIR, SEM, XRD and TGA analyses were used to determine membrane structure. The effect of environmental parameters on absorption was studied, including pH, contact time, temperature and the initial concentration of Ni and Cu ions. Freundlich and Langmuir absorption isotherms were fitted to experimental data and a pseudo-second order rate equation was employed to model the kinetics of uptake for several copper and nickel ion concentrations. The results indicate that the affinity of an SCS/PVA membrane for Cu ions was higher than that for Ni ions. The study demonstrated that the SCS/PVA system can be utilized as highly efficient sorbents, to extract Ni and Cu from aqueous feed solutions.
M.A. Abu-Saied; Ryszard Wycisk; Moustafa M. Abbassy; Gamal Abd El-Naim; F. El-Demerdash; M.E. Youssef; H. Bassuony; Peter N. Pintauro. Sulfated chitosan/PVA absorbent membrane for removal of copper and nickel ions from aqueous solutions—Fabrication and sorption studies. Carbohydrate Polymers 2017, 165, 149 -158.
AMA StyleM.A. Abu-Saied, Ryszard Wycisk, Moustafa M. Abbassy, Gamal Abd El-Naim, F. El-Demerdash, M.E. Youssef, H. Bassuony, Peter N. Pintauro. Sulfated chitosan/PVA absorbent membrane for removal of copper and nickel ions from aqueous solutions—Fabrication and sorption studies. Carbohydrate Polymers. 2017; 165 ():149-158.
Chicago/Turabian StyleM.A. Abu-Saied; Ryszard Wycisk; Moustafa M. Abbassy; Gamal Abd El-Naim; F. El-Demerdash; M.E. Youssef; H. Bassuony; Peter N. Pintauro. 2017. "Sulfated chitosan/PVA absorbent membrane for removal of copper and nickel ions from aqueous solutions—Fabrication and sorption studies." Carbohydrate Polymers 165, no. : 149-158.