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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I am Dr. Fatma El-Zahraa A. A. Ahmed (Ph.D.) a lecturer at the Zoology Department, Faculty of Science, Sohag University, Sohag city, Egypt. I was granted my Ph.D. degree from the Department for Farm Animals and Veterinary Public Health, Clinical Division of Fish Medicine, University of Veterinary Medicine, Vienna. My research interest is in the field of Fish Diseases Management, Nanomedicine, Genetics, Proteomics, Fish Immunology, Fish Histopathology, and Microbiology.

Dietary selenium nanoparticles (SeNPs) mediate intestinal microbiome and microbiota-derived metabolites regulating the growth and immunity of Nile tilapia

2025-04-19 18:20:21 | 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

Fabrication of algogenic zinc nanoparticles and assessment of their biomimetics attributes and potential antibacterial efficacy against fish pathogens

2025-04-15 15:54:13 | Keywords biogenic-ZnNPs; characterizati,
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

Ameliorative effects of chitosan and chitosan nanoparticles against 2, 3, 7, 8-tetrachlorodibenzo-P-dioxin-induced hepatotoxicity in albino rats

2025-04-15 15:36:28 | Keywords Chitosan nanoparticle, Dioxin,
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

Dietary algal-sourced zinc nanoparticles promote growth performance, intestinal integrity, and immune response of Nile tilapia (Oreochromis niloticus).

2024-09-30 08:38:54 | Keywords Tilapia, Feedi, Nanoparticles,
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

Toxicity Evaluation, Oxidative, and Immune Responses of Mercury on Nile Tilapia: Modulatory Role of Dietary Nannochloropsis oculata

2023-12-17 20:32:30 | Keywords Acetylcholinesterase activity,
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

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