Mehrez E. El‐Naggar

National Research Centre

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i-10 index

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Jihan Hussein

National Research Centre

Tawfik A. Khattab

National Research Centre

M.A. Abu-Saied

City of Scientific Research and Technological Applications

A. Hebeish

National Research Centre

Abdelrahman M. Abdelgawad

Aswan University

Ahmed M. Youssef

National Research Centre

Mohamed H. El‐Newehy

King Saud University

Dalia Medhat

National Research Centre

Emad K. Radwan

National Research Centre

Mohamed Ahmed

University of Khartoum

Cooperative Institutions

National Research Centre

155

National Water Research Center

Cairo University

Ain Shams University

King Saud University

Menoufia University

Al-Azhar University

Alexandria University

Helwan University

Tanta University

Author Statistics

Papers

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Harnessing the power of microbial fuel cells as pioneering green technology: advancing sustainable energy and wastewater treatment through innovative nanotechnology

Bioprocess and Biosystems Engineering (2025)

H. Elhosiny Ali Bahaa A. Hemdan Mehrez E. El‐Naggar Mohamed Azab El‐Liethy Dipak A. Jadhav

Abstract The purpose of this review is to gain attention about intro the advanced and green technology that has dual action for both clean wastewater and produce energy. Water scarcity and the continuous energy crisis have arisen as major worldwide concerns, requiring the creation of ecologically friendly and sustainable energy alternatives. The rapid exhaustion of fossil resources needs the development of alternative energy sources that reduce carbon emissions while maintaining ecological balance. Microbial fuel cells (MFCs) provide a viable option by producing power from the oxidation of organic and biodegradable chemicals using microorganisms as natural catalysts. This technology has sparked widespread attention due to its combined potential to cleanse wastewater and recover energy. The review presents a complete examination of current advances in MFCs technology, with a focus on the crucial role of anode materials in improving their performance. Moreover, different anode materials and their nanoscale modifications are being studied to boost MFC efficiency. This current review also focused on the effects of surface modifications and different anode compositions on power generation and system stability. It also investigates the electrochemical principles behind these enhancements, providing insights into the economic potential of MFCs. MFCs provide a long-term solution to energy and environmental issues by addressing both wastewater treatment and energy production.

10.1007/s00449-024-03115-z

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Core–shell Au@Se nanoparticles embedded in cellulose acetate/polyvinylidene fluoride scaffold for wound healing

Journal of Materials Research and Technology (2020)

Ali Aldalbahi Mehrez E. El‐Naggar Mohamed Ahmed Govindasami Periyasami Mostafizur Rahaman

Using a pulsed laser ablation system, core–shell [email protected] nanoparticles ([email protected] NPs) were efficiently synthesized and incorporated into a polymeric nanofibrous cellulose acetate (CA)/polyvinylidene fluoride (PVDF) solution prior to electrospinning. Highly crystalline [email protected] NPs were formed in a spherical core/shell configuration with core and shell diameters of 10.5 nm and 25 nm, respectively. The networked scaffolds were decorated with micro-distensions with lengths ranging from 2.8 to 4.3 μm at the lowest [email protected] NPs content. Cell viability analysis confirmed the high biocompatibility of the produced scaffolds, with survival ratios around 91.1 ± 3.4% and 88.2 ± 4.3% at the lowest and highest concentrations of [email protected] NPs, respectively. Obviously, the cells spread and proliferated significantly through the nanofibers. Moreover, the cells not only grew on the surface, but also connected through the deeply porous interior of the nanoparticles. The compositions of these nanofibrous scaffolds can be manipulated to realize a new design for the dressing and healing of wounded tissues.

Polyvinylidene fluoride

Electrospinning

Biocompatibility

Cellulose acetate

Bacterial Cellulose

10.1016/j.jmrt.2020.10.079

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Citations (55)

Hydroxyethyl cellulose/bacterial cellulose cryogel dopped silver@titanium oxide nanoparticles: Antimicrobial activity and controlled release of Tebuconazole fungicide

International Journal of Biological Macromolecules (2020)

Mehrez E. El‐Naggar Mohamed S. Hasanin Ahmed M. Youssef Ali Aldalbahi Mohamed H. El‐Newehy

Tebuconazole

Hydroxyethyl cellulose

Hydroxypropyl cellulose

Bacterial Cellulose

10.1016/j.ijbiomac.2020.09.226

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Citations (85)

Facile development of photochromic cellulose acetate transparent nanocomposite film immobilized with lanthanide‐doped pigment: ultraviolet blocking, superhydrophobic, and antimicrobial activity

Luminescence (2020)

Tawfik A. Khattab Mehrez E. El‐Naggar Meram S. Abdelrahman Ali Aldalbahi Mohammad Rafe Hatshan

Abstract Smart photochromic and fluorescent products can respond to an external stimulus by changing their colour and emission spectra with light. Here, we developed a simple formulation of an organic–inorganic nanocomposite photoluminescent cellulose acetate (CA) film based on immobilization of a lanthanide‐doped pigment. Strontium aluminium oxide pigment doped with Eu 2+ and Dy 3+ (SAOED) exhibits an optimal excitation wavelength at 365 nm. For better fabrication of the multifunctional colourless pigment–cellulose acetate composites (CA–SAOED), the lanthanide‐doped colourant must be well‐dispersed physically without agglomeration. The fabricated photoluminescence cellulose film exhibited an excitation peak at 436 nm and two fluorescence peaks at 494 and 524 nm. The findings revealed that the originated nanocomposite films demonstrated improved superhydrophobic activity, high ultraviolet light protection and enhanced antibacterial activity without adversely influencing its native physico‐mechanical characteristics. The films demonstrated fast and reversible photochromic responsiveness without fatigue during ultraviolet light irradiation.

Cellulose acetate

Ultraviolet

Trisodium citrate

Ultraviolet light

10.1002/bio.3974

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Citations (49)

Green metallochromic cellulose dipstick for Fe(III) using chitosan nanoparticles and cyanidin-based natural anthocyanins red-cabbage extract

International Journal of Biological Macromolecules (2022)

Tawfik A. Khattab Mehrez E. El‐Naggar Mehboobali Pannipara S. Wageh Manal F. Abou Taleb

Red cabbage

10.1016/j.ijbiomac.2022.01.067

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Citations (24)

Insight into mitigation of corrosion behavior of novel chalcone derivative for AZ91 Mg alloy in saline solution: synthesis, characterization, electrochemical and adsorption studies

Journal of Electroanalytical Chemistry (2023)

Sherief A. Al Kiey Huda R. M. Rashdan Mehrez E. El‐Naggar

Thermogravimetric analysis

10.1016/j.jelechem.2023.117304

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Citations (13)

Enhancement of dyeing cotton fabrics using nanocomposite

Journal of Textiles Coloration and Polymer Science (2019)

Mehrez E. El‐Naggar Hamada Mashaly M. H. Fawzy

A CTUALLY, the present current work addresses an innovative approach for benign enhancement of dyeing of cotton fabrics assisted with nanocomposite based on chitosan (Cs), silver nanoparticles (Ag NPs) and clay.The Cs/Ag NPs and Cs/Ag NPs/clay nanocomposites were prepared using UV irradiation and applied on the cotton fabrics by paddry-curing method.The blank and treated cotton fabrics were dyed with C.I. Acid Orange 74.The Dye exhaustion, colorimetric analysis as well as fastness properties of the treated fabrics was evaluated.The obtained data proves that the nanocomposite of Cs/Ag NPs/clay is a promising mixture for durable dyeing for cotton fabrics.

Silver nanoparticle

10.21608/jtcps.2019.13269.1022

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Structural Transition in SrZnO Laser Pulse Deposited Alloy

Archives of Metallurgy and Materials (2017)

Hamad Albrithen Mehrez E. El‐Naggar K. Oźga M. Szota Z.A. Alahmed

Abstract We have discovered a structural transition for the SrZnO alloy films from a wurtzite to a rock-salt structure, leading to a reduction in the (112̲0)/(0001) surface energy ratio. The films were grown by pulsed laser deposition using different SrO ratios, x. We have revealed that growth at a higher temperature, 750°C, resulted in a sharp 0002 peak at a low SrO content (5%), whereas growth at a higher SrO content (10%) resulted in a non-crystalline film with minute crystallites with a (112̲0) orientation. Generally the crystallinity decreased as the SrO content increased. No results obtained for the crystalline films showed any orientation of significant peaks besides the peak attributed to the (0001) plane, suggesting epitaxial growth. Optical measurements showed difference in transmission widows of alloys with different SrO percentage, and this was correlated to SrO influence on growth mode as indicated by scanning electron imaging. The studied SrZnO films, with SrO/(SrO + ZnO) ≤ 0.25, were grown by pulsed laser deposition using different SrO ratios, x. The effects of temperature and oxygen pressure during growth on the films’ structural properties were investigated. XRD results indicate that the film crystallinity was improved as the temperature and O 2 pressure increased up to 650°C and 0.5 Torr, respectively.

Pulsed Laser Deposition

Wurtzite crystal structure

Torr

10.1515/amm-2017-0030

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Citations (2)

Blocking of gastric acid induced histopathological alterations, enhancing of DNA content and proliferation of goblet cells in the acute lung injury mice models by nano-fenugreek oral administration

Toxicology Mechanisms and Methods (2019)

Sherin Ramadan Hamad Mehrez E. El‐Naggar

This current study aimed at detecting the potential protective role of nano-fenugreek seed on acute lung injury (ALI) induced by instillation gastric acid in male Swiss albino mice using histological and histochemical studies. Forty animals were grouped as follows: control group, HCl-treated group, low nano-fenugreek + HCl treated group, and high nano-fenugreek + HCl treated group. Pretreatment with nano-fenugreek in animal model of ALI resulted in marked ameliorations of the lung histological lesions and injury induced by HCL instillation in a dose dependent manner. It also caused inhibition in the increase of the DNA content and prevented proliferation of goblet cells induced by HCl instillation alone. In conclusion, pretreatment with Nano-fenugreek prior induction ALI could be suppress the aggregations of inflammatory cells, enhancing of DNA content, and proliferation of goblet cells induced by gastric acid in a dose dependent manner. We suggest that Nano-fenugreek may be useful in combating lung injury.

Goblet cell

10.1080/15376516.2019.1669249

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Citations (2)

Prophylactic effect of probiotics fortified withAloe verapulp nanoemulsion against ethanol-induced gastric ulcer

Toxicology Mechanisms and Methods (2021)

Jihan Hussein Mona A. El‐Bana Mehrez E. El‐Naggar Yasmin Abdel‐Latif Samah M. El‐Sayed

The purpose of this study was designed to evaluate the protective effect of probiotics fortified with Aloe vera pulp nanoemulsion on ethanol-induced gastric ulcer (GU). Freshly harvested Aloe vera pulp nanoemulsion was prepared and subsequently inoculated with 2% of the activated yogurt starter culture of Streptococcus thermophilus and Lactobacillus delbreukii subsp. bulgaricus (1:1). Chemical composition and physicochemical characterization of yogurt and the Aloe vera pulp nanoemulsion were assessed. GU was induced by ethanol. Rats were randomly assigned into control, GU, and four prophylactic groups including probiotics fortified with Aloe vera pulp nanoemulsion in the percentage of 0%, 10%, 20%, and 30% respectively. Serum levels of paraoxynase (POX) and tissue levels of malondialdehyde (MDA), nitric oxide (NO), and catalase (CAT) activity were assessed. Serum levels of nuclear factor kappa B (NF-κB), interleukin-1beta (IL-1β), matrix metalloproteinase-9 (MMP-9), ceramide, and homocysteine (Hcy) were evaluated. Results indicated that the Aloe vera pulp nanoemulsion was appeared in spherical nano form with droplets diameter around 330 nm. Ethanol induces GU to cause a significant increase in the levels of MDA, NO, NF-κB, IL-1β, MMP-9, Hcy, and ceramide along with a significant decrease in POX and CAT activities compared to the control group (p < 0.05). Pretreatment with different concentrations of probiotics fortified with Aloe vera pulp nanoemulsion with, especially the 30% concentration, significantly reduce the oxidative stress and ameliorate the release of different inflammatory mediators suggesting it as a promising approach in the protection against GU via scavenging superoxide radicals and inhibiting the activation of the inflammatory signaling cascades.

Aloe Vera

Malondialdehyde

10.1080/15376516.2021.1958112

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Citations (12)