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46 results on '"El-Sayed, Fatma"'

10. Recent advances in waste-recycled nanomaterials for biomedical applications: Waste-to-wealth

Author

Abd Elkodous Mohamed, El-Husseiny Hussein M., El-Sayyad Gharieb S., Hashem Amr Hosny, Doghish Ahmed S., Elfadil Dounia, Radwan Yasmine, El-Zeiny Hayam M., Bedair Heba, Ikhdair Osama A., Hashim Hisham, Salama Ahmed M., Alshater Heba, Ahmed Ahmed Ali, Elsayed Mahmoud Gamal, Nagy Maria, Ali Nouran Y., Elahmady Maryam, Kamel Ahmed M., Elkodous Mahmoud Abd, Maallem Imene, Kaml Maria B. Sh., Nasser Nayera, Nouh Ahmed AlaaEldin, Safwat Fatma M., Alshal Mai M., Ahmed Salma K., Nagib Taha, El-sayed Fatma M., Almahdi Manal, Adla Yahia, ElNashar Noha T., Hussien Aya Misbah, Salih Alaa S., Mahmoud Somaya Abdulbaset, Magdy Shireen, Ahmed Diana I., Hassan Fayrouz Mohamed Saeed, Edward Nermin A., Milad Kirolos Said, Halasa Shereen R., Arafa Mohamed M., Hegazy Abdullah, Kawamura Go, Tan Wai Kian, and Matsuda Atsunori

Subjects
recycled nanomaterials, biomedical applications, antimicrobial activity, anticancer agents, biomass wastes, Technology, Chemical technology, TP1-1185, Physical and theoretical chemistry, QD450-801
Published
2021
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17. Energy Levels, Transition Probabilities and Electron-Impact Excitations Of Ge-Like Pr, Nd, Pm, Sm and Eu ions

Author

Nagy, O. and El_Sayed, Fatma

Subjects
Physics - Atomic Physics
Abstract

Energies, wavelengths, transition probabilities, and oscillator strengths have been calculated for the 4s24p2-4s4p3, 4s24p2-4s24p4d and 4s4p3-4p4 allowed transitions in heavy Ge-like ions with Z=59-63. The fully relativistic Multiconfiguration Dirac-Fock (MCDF) method taking into account both the correlations within the n=4 complex and the quantum electrodynamic (QED) effects have been used in the calculations. MCDFGME code is used to calculate electron impact excitation cross sections for the 4s24p2-4s4p3 and 4s24p2-4s24p4d transitions with plane-wave Born approximation. The results of Pr XXVIII, Nd XXIX, Pm XXX, Sm XXXI and Eu XXXII are compared with HFR method results., Comment: 6 pages, 5 figures, 16 tables

Published
2010

32. Comparative Degradation Studies of Carmine Dye by Photocatalysis and Photoelectrochemical Oxidation Processes in the Presence of Graphene/N-Doped ZnO Nanostructures

Author

El-Sayed, Fatma, primary, Hussien, Mai S. A., additional, AlAbdulaal, Thekrayat H., additional, Ismail, Ahmed, additional, Zahran, Heba Y., additional, Yahia, Ibrahim S., additional, Abdel-wahab, Mohamed Sh., additional, Khairy, Yasmin, additional, Ali, Tarik E., additional, and Ibrahim, Medhat A., additional

Published
2022
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33. The Photocatalytic Performance of Nd2O3 Doped CuO Nanoparticles with Enhanced Methylene Blue Degradation: Synthesis, Characterization and Comparative Study

Author

El-Sayed, Fatma, primary, Hussien, Mai S. A., additional, Mohammed, Mervat I., additional, Ganesh, Vanga, additional, AlAbdulaal, Thekrayat H., additional, Zahran, Heba Y., additional, Yahia, Ibrahim S., additional, Hegazy, Hosam H., additional, Abdel-wahab, Mohamed Sh., additional, Shkir, Mohd., additional, Valarasu, Santiyagu, additional, and Ibrahim, Medhat A., additional

Published
2022
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35. Isolation and identification of a prodigiosin-like pigment producer Vibrio sp. isolate from a sea snail Thais sp.

Author

El-Sayed, Fatma M. A., Abdullah, Shymaa, Sabry, Soraya A., and Ghozlan, Hanan A.

Subjects
*PRODIGIOSIN, *VIBRIO, *MANNITOL, *MARINE bacteria, *LIQUID chromatography-mass spectrometry, *PIGMENTS, *CHROMIUM oxide
Abstract

Marine bacteria associated with Mediterranean Sea snails have not been explored intensively. The aim of the study was to explore marine pigmented bacteria associated with the sea snail Thais sp. commonly found in Alexandria seashores where a red-pigmented bacterium was isolated and identified as Vibrio sp. based on phenotypic traits and 16S rRNA gene sequence analysis. Based on ultraviolet-visible (UV-vis) spectral and liquid chromatography-mass spectrometry (LC-MS) analysis, the red pigment was identified as a prodigiosin-like pigment. To our knowledge, this is the first report on the isolation of a Vibrio strain from a gastropod able to synthesize prodigiosin. Maximum production (7 mg/L) was achieved after two days in MZM cultures containing 0.5% mannitol and 2.5% soybean meal, pH 7 and statically incubated at 30 °C, using Plackett-Burman factorial design. RT-qPCR revealed that pks-1 and nrps responsible for the biosynthesis of prodigiosin and other bioactive compounds were up-regulated by the addition of sublethal concentrations of imipenem, DMSO, and the heavy metals copper oxide and chromium VI oxide. Through this work it can be concluded that marine invertebrates should be further explored for bacteria producing bioactive compounds whose synthesis can be enhanced or blocked depending on the carbon and nitrogen sources adopted in the fermentation medium. Moreover, the mRNA expression of the genes responsible for prodigiosin-like pigment production can be up-regulated through adopting sub-lethal concentrations of stress inducing compounds as well as co-cultivation. [ABSTRACT FROM AUTHOR]

Published
2022

36. The Photocatalytic Performance of Nd 2 O 3 Doped CuO Nanoparticles with Enhanced Methylene Blue Degradation: Synthesis, Characterization and Comparative Study.

Author

El-Sayed, Fatma, Hussien, Mai S. A., Mohammed, Mervat I., Ganesh, Vanga, AlAbdulaal, Thekrayat H., Zahran, Heba Y., Yahia, Ibrahim S., Hegazy, Hosam H., Abdel-wahab, Mohamed Sh., Shkir, Mohd., Valarasu, Santiyagu, and Ibrahim, Medhat A.

Abstract

The growth of the textile industry results in a massive accumulation of dyes on water. This enormous rise in pigments is the primary source of water pollution, affecting the aquatic lives and our ecosystem balance. This study aims to notify the fabrication of neodymium incorporated copper oxide (Nd2O3 doped CuO) nanoparticles by combustion method for effective degradation of dye, methylene blue (MB). X-ray diffraction (XRD), Field emission Scanning electron microscopy (FESEM), Zeta potential have been applied for characterization. Photocatalyst validity has been evaluated for methylene blue degradation (MB). Test conditions such as time of contact, H2O2, pH, and photo-Fenton have been modified to identify optimal degradation conditions. Noticeably, 7.5% Nd2O3 doped CuO nanoparticle demonstrated the highest photocatalytic efficiency, up to 90.8% in 80 min, with a 0.0227 min−1 degradation rate. However, the photocatalytic efficiency at pH 10 becomes 99% with a rate constant of 0.082 min−1. Cyclic experiments showed the Nd2O3 doped CuO nanoparticle's stability over repeated use. Scavenge hydroxyl radical species responsible for degradation using 7.5% Nd2O3 doped CuO nanoparticles have been investigated under visible irradiation. [ABSTRACT FROM AUTHOR]

Published
2022
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46. Recent advances in waste-recycled nanomaterials for biomedical applications: Waste-to-wealth

Author

Abd Elkodous, Mohamed, El-Husseiny, Hussein M., El-Sayyad, Gharieb S., Hashem, Amr Hosny, Doghish, Ahmed S., Elfadil, Dounia, Radwan, Yasmine, El-Zeiny, Hayam M., Bedair, Heba, Ikhdair, Osama A., Hashim, Hisham, Salama, Ahmed M., Alshater, Heba, Ahmed, Ahmed Ali, Elsayed, Mahmoud Gamal, Nagy, Maria, Ali, Nouran Y., Elahmady, Maryam, Kamel, Ahmed M., Elkodous, Mahmoud Abd, Maallem, Imene, Kaml, Maria B. Sh., Nasser, Nayera, Nouh, Ahmed AlaaEldin, Safwat, Fatma M., Alshal, Mai M., Ahmed, Salma K., Nagib, Taha, El-sayed, Fatma M., Almahdi, Manal, Adla, Yahia, ElNashar, Noha T., Hussien, Aya Misbah, Salih, Alaa S., Mahmoud, Somaya Abdulbaset, Magdy, Shireen, Ahmed, Diana I., Hassan, Fayrouz Mohamed Saeed, Edward, Nermin A., Milad, Kirolos Said, Halasa, Shereen R., Arafa, Mohamed M., Hegazy, Abdullah, Kawamura, Go, Tan, Wai Kian, and Matsuda, Atsunori

Abstract

Global overpopulation, industrial expansion, and urbanization have generated massive amounts of wastes. This is considered as a significant worldwide challenge that requires an urgent solution. Additionally, remarkable advances in the field of biomedicine have impacted the entire spectrum of healthcare and medicine. This has paved the way for further refining of the outcomes of biomedical strategies toward early detection and treatment of different diseases. Various nanomaterials (NMs) have been dedicated to different biomedical applications including drug delivery, vaccinations, imaging modalities, and biosensors. However, toxicity is still the main factor restricting their use. NMs recycled from different types of wastes present a pioneering approach to not only avoid hazardous effects on the environment, but to also implement circular economy practices, which are crucial to attain sustainable growth. Moreover, recycled NMs have been utilized as a safe, yet revolutionary alternative with outstanding potential for many biomedical applications. This review focuses on waste recycled NMs, their synthesis, properties, and their potential for multiple biomedical applications with special emphasis on their role in the early detection and control of multiple diseases. Their pivotal therapeutic actions as antimicrobial, anticancer, antioxidant nanodrugs, and vaccines will also be outlined. The ongoing advancements in the design of recycled NMs are expanding their diagnostic and therapeutic roles for diverse biomedical applications in the era of precision medicine.

Published
2009
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