Article
Engineering, Environmental
Mohammed F. Hamza, Eric Guibal, Khalid Althumayri, Yuezhou Wei, Ahmed M. Eid, Amr Fouda
Summary: A new sorbent (ACES-F micro-particles) was synthesized by the one-pot reaction of N-(2-acetamido)-2-aminoethanesulfonic acid with formaldehyde. The sorbent showed high sorption capacity for Cs(I) and good selectivity against alkali and other competitor metal ions. It had a fast sorption rate and could be easily desorbed using nitric acid. The sorbent also demonstrated interesting antimicrobial properties and potential for cesium recovery from seawater.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
A. Elaraby, Amr Elgendy, M. Abd-El-Raouf, M. A. Migahed, A. S. El-Tabei, Aboubakr M. Abdullah, Noora H. Al-Qahtani, Sami M. Alharbi, Samy M. Shaban, Dong-Hwan Kim, N. M. El Basiony
Summary: In this study, effective Gemini cationic surfactants (CSII, CSIV) were synthesized and characterized. The adsorptive properties of CSII and CSIV at HCl/air and C-steel/HCl interfaces were investigated using surface tension and electrochemical parameters. The results showed that CSII and CSIV have high adsorption affinity at the HCl/air interface, with aliphatic chains promoting surfactant adsorption. Electrochemical impedance spectroscopy and potentiodynamic polarization revealed that CSII and CSIV act as mixed inhibitors, significantly enhancing the charge transfer resistance of C-steel in HCl. Theoretical calculations and simulations supported the experimental findings, demonstrating the relationship between corrosion inhibition and molecular structure.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Archaeology
Gomaa Abdel-Maksoud, Samiaa Gaballah, Ahmed M. Youssef, Ahmed M. Eid, Mahmoud H. Sultan, Amr Fouda
Summary: The deterioration aspects and fungal strains associated with Papio Hamadryas skeleton dating back to the Greco-Roman period were investigated. Two green synthesized nanoparticles, silver nanoparticles (Ag-NPs) and magnesium nanoparticles (MgO-NPs), were found to effectively suppress fungal growth. Ag-NPs exhibited higher growth inhibition percentages than MgO-NPs at a concentration of 300 ppm. The study recommended the use of Ag-NPs at 300 ppm for disinfection of the archaeological skeleton.
JOURNAL OF CULTURAL HERITAGE
(2023)
Article
Chemistry, Physical
Ahmed M. Eid, Amr Fouda, Saad El-Din Hassan, Mohammed F. Hamza, Nada K. Alharbi, Amr Elkelish, Afaf Alharthi, Waheed M. Salem
Summary: The aqueous extract of Portulaca oleracea was utilized to bio-fabricate spherical and crystalline copper oxide nanoparticles (CuO-NPs). The synthesized CuO-NPs showed high stability and promising antimicrobial and catalytic activities. Additionally, they exhibited excellent decolorization and heavy metal removal capabilities in tanning wastewater treatment.
Article
Chemistry, Multidisciplinary
A. Bahrawy, Amr Elgendy, Sami M. Alharbi, M. M. El-Rabiei, M. A. Deyab, H. Nady
Summary: The electrochemical performance of Fe-14Cr-8Mn alloy in physiological fluids was studied, along with the inhibitory effects of tyrosine, tryptophan, and L-histidine on the alloy's corrosion in simulated body solutions. Surface morphology and elemental composition were analyzed using scanning electron microscopy, energy dispersive X-ray, and X-ray photoelectron spectroscopy. The electrochemical performance was evaluated using potentiodynamic polarization and electrochemical impedance spectroscopy. The results showed that the amino acids inhibited the corrosion of the alloy, with tryptophan being the most effective inhibitor.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2023)
Article
Chemistry, Multidisciplinary
Athanasios A. Papaderakis, Andinet Ejigu, Jing Yang, Amr Elgendy, Boya Radha, Ashok Keerthi, Anne Juel, Robert A. W. Dryfe
Summary: The unique layered structure of graphite and its tunable interlayer distance allow for the accommodation of ions into its structure. The smooth and chemically inert nature of the graphite surface makes it an ideal substrate for electrowetting. This study combines these two properties and explores the significant effect of anion intercalation on the electrowetting response of graphitic surfaces. Through in situ Raman spectroscopy, the structural changes during intercalation/deintercalation were studied, providing insights into the influence of intercalation staging on the rate and reversibility of electrowetting. By tuning the intercalant size and stage of intercalation, a fully reversible electrowetting response can be achieved. The approach is extended to biphasic (oil/water) systems, allowing for a fully reproducible electrowetting response with a near-zero voltage threshold and unprecedented contact angle variations.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Microbiology
Mahmoud Abdel-Nasser, Gomaa Abdel-Maksoud, Ahmed M. Eid, Saad El-Din Hassan, Aya Abdel-Nasser, Maha Alharbi, Amr Elkelish, Amr Fouda
Summary: Twelve fungal strains were isolated from a deteriorated historical manuscript. The ability of these strains to degrade the paper was investigated, as well as the antifungal activity of a probiotic bacterial strain. The results showed that the bacterial strain's cell-free filtrate had promising antifungal activity and could be used for the preservation of degraded historical papers.
Article
Engineering, Biomedical
Amr Fouda, Ebrahim Saied, Ahmed M. Eid, Fayza Kouadri, Ahmed M. Alemam, Mohammed F. Hamza, Maha Alharbi, Amr Elkelish, Saad El-Din Hassan
Summary: Zinc oxide nanoparticles were successfully synthesized using pomegranate peel extract as a green approach. The synthesized nanoparticles showed spherical, well-arranged structures with sizes ranging from 10-45 nm. These nanoparticles exhibited antimicrobial activity against pathogenic bacteria and unicellular fungi, as well as catalytic activity for the degradation of methylene blue dye.
JOURNAL OF FUNCTIONAL BIOMATERIALS
(2023)
Correction
Biochemistry & Molecular Biology
Ahmed G. Hamodin, Walid E. Elgammal, Ahmed M. Eid, Ahmed G. Ibrahim
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Biochemistry & Molecular Biology
Ahmed G. Hamodin, Walid E. Elgammal, Ahmed M. Eid, Ahmed G. Ibrahim
Summary: This work describes the synthesis and characterization of a new chitosan derivative (DPPS-CH) that shows amorphous and porous structure. The derivative exhibits accelerated thermal decomposition compared to chitosan. It also demonstrates potent antimicrobial activity and cytotoxicity against cancer cells, making it a promising material for biological applications.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Biology
Amr Fouda, Mahmoud Abdel-Nasser, Ahmed M. Eid, Saad El-Din Hassan, Aya Abdel-Nasser, Nada K. Alharbi, Ahlam H. AlRokban, Gomaa Abdel-Maksoud
Summary: This study investigates the use of green synthesized titanium oxide nanoparticles to inhibit the growth of fungal strains isolated from deteriorated historical manuscripts. The nanoparticles were successfully formed using a probiotic bacterial extract and showed low toxicity against normal cells. When applied as a coating agent for leather, they effectively inhibited fungal growth and prevented further deterioration of the manuscripts.
Article
Chemistry, Multidisciplinary
Ahmed G. Ibrahim, Walid E. Elgammal, Ahmed M. Eid, Maha Alharbi, Ahmad E. Mohamed, Aisha A. M. Alayafi, Saber M. Hassan, Amr Fouda
Summary: In this study, a new modified chitosan conjugate (Chito-TZ) was successfully synthesized and characterized. The crystal structure of Chito-TZ was found to be different from that of chitosan after chemical modification. Chito-TZ exhibited better antibacterial and antifungal activities and accelerated thermal decomposition compared to chitosan.
CHEMISTRY-SWITZERLAND
(2023)
Article
Chemistry, Multidisciplinary
Amr Fouda, Khalid S. Alshallash, Mohammed I. Alghonaim, Ahmed M. Eid, Ahmed M. Alemam, Mohamed A. Awad, Mohammed F. Hamza
Summary: In this study, an aqueous extract of pomegranate peel was used as a biocatalyst for the synthesis of magnesium oxide nanoparticles (MgO-NPs). The synthesized MgO-NPs showed antimicrobial activity against various pathogenic microbes and inhibited the hatching of Culex quinquefasciatus larvae to adults.
CHEMISTRY-SWITZERLAND
(2023)
Article
Chemistry, Multidisciplinary
Samir Bondock, Tallah Albarqi, Mohamed Abboud, Tamer Nasr, Nada M. Mohamed, Moaz M. Abdou
Summary: A novel series of thiazole hybrids targeting hCAIX were synthesized and evaluated for their cytotoxicity. The compounds showed enhanced cytotoxicity against different cancer cell lines, with some derivatives exhibiting significant improvements. Molecular docking and dynamic simulation studies provided insights into the binding of the compounds with the target enzyme and their potential mechanism of action.
Article
Chemistry, Multidisciplinary
Samir Bondock, Tallah Albarqi, Ibrahim A. Shaaban, Moaz M. Abdou
Summary: In this study, novel differently substituted unsymmetrical azine-modified thiadiazole sulfonamide derivatives were designed and prepared using the combi-targeting approach for potential anticancer therapy. The E/Z configuration and chemical shifts of the synthesized compounds were determined through spectroscopic analysis and quantum mechanical calculations, which were consistent with experimental data, suggesting their existence in solution. The biological activities of the synthesized compounds were predicted using molecular reactivity descriptors and ADMT/drug-likeness properties.