fatmaelzahraa_ahmed

Dr. Fatma El-Zahraa Abdel-Hameed Abdel-Rahman Ahmed

Lecturer - Lecturer (Ph.D.)

Faculty of science

Address: Zoology Department, Faculty of Science, Sohag 82524, Egypt

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2025 | Keywords Dioxin, Chitosan nanoparticle,
Ameliorative effects of chitosan and chitosan nanoparticles against  2, 3, 7, 8-tetrachlorodibenzo-P-dioxin-induced hepatotoxicity in  albino rats
B IO-NANOTECHNOLOGY employing natural products is a promising approach for discovering and developing new drugs for treating various diseases. Chitosan (CH) is a natural product produced from crustacean shells. Recently, both CH and Chitosan nanoparticles (CH-NP) have been used in various pharmaceutical and biomedical applications owing to their unique properties. The main aim of this study was to determine the ... Read more

Fabrication of algogenic zinc nanoparticles and assessment of their biomimetics attributes and potential antibacterial efficacy against fish pathogens
This study investigates the fabrication of algogenic zinc nanoparticles (ZnNPs), examining their biomimetic properties and potential antibacterial effectiveness against fish pathogens. The rising incidence of antibiotic resistance in aquaculture demands innovative strategies for disease management, highlighting the importance of developing biocompatible and effective antimicrobial agents. In this context, ZnNPs were synthesized using Pediastrum boryanum microalgal extract as the reducing and ... Read more

2025 | Keywords feeding, gene expression, gut,
Dietary selenium nanoparticles (SeNPs) mediate intestinal microbiome and microbiota-derived metabolites regulating the growth and immunity of Nile tilapia
Maintaining a healthy intestine is essential for growth and host defense mechanisms of farmed fish, particularly those densely stocked. In this context, maintaining a healthy intestinal microbiota for proper digestion, absorption, and integrity of the mucosa is of utmost importance. Nano-form (SeNPs)-enriched _Pediastrum boryanum_ (Turpin) exhibits antimicrobial, antioxidant, and antitumor properties. Therefore, SeNPs are valuable nutrition supplements for farmed aquatic ... Read more

2024 | Keywords Tilapia, Nanoparticles, Feedi,
Dietary algal-sourced zinc nanoparticles promote growth performance, intestinal integrity, and immune response of Nile tilapia (Oreochromis niloticus).
Background Trace elements play a crucial role in fish nutrition, with zinc (Zn) being one of the most important ele ments. BIO-sourced zinc nanoparticles were synthesized using the green microalga Pediastrum boryanum (BIO-ZnNPs, 29.35 nm). 30 or 60 mg/ kg dry feed of the BIO-ZnNPs (BIO-ZnNPs30 and BIO-ZnNPs60) were mixed with the Nile tilapia (Oreochromis niloticus) basal diet and fed ... Read more

2024 | Keywords Collagen (I & III), Fish, Rena,
Nephrotoxicity of Single or Combined Exposure to Microplastics (MPs)  and Sodium Lauryl Sulfate (SLS) in African Catfish (Clarias gariepinus)
It is unclear how fish in freshwater ecosystems are affected by the combined presence of microplastics (MPs) and anionic surfactant detergents. So, our investigations focus on the nephrotoxic effects of both Polyethylene microplastics (PE-MPs) and Sodium lauryl sulfate (SLS) in single or combined exposure on African Catfish (Clarias gariepinus). In the current study, rearing water of catfish (Clarias gariepinus) was ... Read more

2024 | Keywords Aquatic Mites, Crustacea, Fish,
Manipulative Strategies of Aquatic Arthropods for Fish Parasitism: A Review
Several aquatic arthropodan classes, including Arachnida, Crustacea, and Ostracoda can parasitize on fish and might cause discomfort or serious harm to their tissues. These organisms can parasitize fish through either obligatory, facultative, or opportunistic relationships according to their behavior or the surrounding conditions. Free-living arthropods may be induced to parasitize fish by various physiological, environmental, or biological stimuli. Some other ... Read more

2024 | Keywords O. niloticus, Nile tilapia, t,
Impact of transportation in freshwater and brackish water on Oreochromis niloticus (Nile tilapia) resistance
Background: Oreochromis niloticus has great economic value and potential for farming and development. Transportation of fish was done for breeding or trading purpose and it is a challenging aspect of aquaculture. This study aimed to investigate the effect of transportation in freshwater and brackish water on the resistance of O. niloticus as well as transportation stress mitigation effect of NaCl. ... Read more

2024 | Keywords FISH, Nanoparticles, Health in,
Dietary microalgal-fabricated selenium nanoparticles improve Nile tilapia biochemical indices, immune-related gene expression, and intestinal immunity
Background Feed supplements, including essential trace elements are believed to play an important role in augmenting fish immune response. In this context, selenium nanoparticles (SeNPs) in fish diets via a green biosynthesis strategy have attracted considerable interest. In this investigation, selenium nanoparticles (SeNPs, 79.26 nm) synthesized from the green microalga Pediastrum boryanum were incorporated into Nile tilapia diets to explore ... Read more

Self‑assembling Organogels Loaded with Tenoxicam for Local Intensive Pain and Inflammation Cure: In Vitro and In Vivo Correlation
Due to tenoxicam (TX)’s poor aqueous solubility (0.072 mg/ml), it is poorly absorbable in the GIT, and the long-term oral administration of TX may cause severe GIT disturbances. Topical administration of TX can help in bypassing the GIT adverse effects. Therefore, in the present work, we constructed different pluronic/lecithin organogels (PLOs) for topical delivery of TX. PLO was constructed simply ... Read more

Toxicity Evaluation, Oxidative, and Immune Responses of Mercury  on Nile Tilapia: Modulatory Role of Dietary Nannochloropsis oculata
The current study evaluated the potential ameliorative effect of a dietary immune modulator, Nannochloropsis oculata microalga, on the mercuric chloride (HgCl2)-induced toxicity of Nile tilapia. Nile tilapia (45–50 g) were fed a control diet or exposed to ¼ LC50 of HgCl2 (0.3 mg/L) and fed on a medicated feed supplemented with N. oculata (5% and 10% (50 or 100 g/kg ... Read more