Ahmed Nassar

ORCID: 0000-0001-8047-0069
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About
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Research Areas
  • Reproductive Biology and Fertility
  • Sperm and Testicular Function
  • Meat and Animal Product Quality
  • Obstructive Sleep Apnea Research
  • Toxin Mechanisms and Immunotoxins
  • Toxoplasma gondii Research Studies
  • Handwritten Text Recognition Techniques
  • Vector-borne infectious diseases
  • Tracheal and airway disorders
  • Vector-Borne Animal Diseases
  • Chemical Reaction Mechanisms
  • Trypanosoma species research and implications
  • Free Radicals and Antioxidants
  • Mycotoxins in Agriculture and Food
  • Parasitic Infections and Diagnostics
  • Nasal Surgery and Airway Studies
  • Ovarian function and disorders
  • Advanced Text Analysis Techniques
  • Reproductive Health and Technologies
  • Fermentation and Sensory Analysis
  • Animal Nutrition and Physiology
  • Coccidia and coccidiosis research
  • Cleft Lip and Palate Research
  • Topic Modeling
  • Craniofacial Disorders and Treatments

Henry Ford Hospital
2025

Cairo University
2006-2024

Arab Academy for Science, Technology, and Maritime Transport
2019-2024

Emory University
2023-2024

Beni-Suef University
2024

University of Leeds
2023

Assiut University
1995-2022

Electronics Research Institute
2019

Ain Shams University
2019

Military Technical College
2019

The objective of this study was to investigate the impact severe oligoasthenoteratozoospermia (OAT) on pregnancy outcome. For purpose 279 consecutive intracytoplasmic sperm injection (i.c.s.i) cycles were retrospectively evaluated and compared 436 IVF performed during same time frame. Group A (n = 62) included ICSI patients with OAT; group B 217) who underwent for other indications; C 436) couples standard IVF. mean age female number embryos transferred comparable in all groups. No...

10.1111/j.1439-0272.1998.tb01152.x article EN Andrologia 2009-04-24

Equine Piroplasmosis (EP) is an infectious disease caused by the hemoprotozoan parasites Theileria equi, Babesia caballi, and recently identified species T. haneyi. Hereby, we used a multiplex PCR (mPCR) targeting 18S rRNA gene of equi B. caballi for simultaneous detection EP in Egyptian equids examined presence haneyi infections Egypt. Blood samples from 155 (79 horses 76 donkeys) collected different governorates Egypt were mPCR hayeni. The method revealed prevalence 20.3% 13.1% donkeys...

10.3390/pathogens10111414 article EN cc-by Pathogens 2021-10-31

Camel piroplasmosis is a tick-borne disease (TBD) caused by hemoprotozoan parasites. Hereby, we describe cross-sectional study aiming at identifying Piroplasma spp.-infecting camels in Egypt using multipronged molecular diagnostic approach. A total of 531 blood samples from (Camelus dromedarius) were collected slaughterhouses different governorates for analysis during the period June 2018 to May 2019. spp. was identified microscopical examination and several sequential polymerase chain...

10.3389/fvets.2023.1178511 article EN cc-by Frontiers in Veterinary Science 2023-04-28

Eosinophilic granuloma (EG) is a bony destructive disease that frequently occurs in children; it subtype of Langerhans cell histiocytosis. The aims this study were to detect the presenting features temporal bone lesions children and evaluate efficacy surgery combined with radiotherapy treatment disease. A retrospective on 12 EG was done. Computed tomography hearing assessment performed for all patients. All patients treated cortical mastoidectomy followed by postoperative radiotherapy....

10.1097/scs.0000000000000468 article EN Journal of Craniofacial Surgery 2014-04-09

Pentoxifylline (PTX) was incubated in vitro with human spermatozoa to examine its effects on sperm motility characteristics and bovine cervical mucus penetrability (BCMP). Sperm motion parameters were assessed by computer-assisted analysis (CASA) using HTM-IVOS BCMP evaluated the Penetrak kit. In incubation PTX (1 mg ml-1; 3.6 mM, 30 min) did not significantly change percentage motility, average path velocity (VAP), straight-line (VSL) or beat cross frequency (BCF) of from normozoospermic...

10.1046/j.1439-0272.1999.00241.x article EN Andrologia 1999-02-01

Polymeric nanocomposite materials are very important because of their promised applications. However, many fundamental physical, mechanical, and chemical behaviors have not been quantified. Depending on the interface forces between polymer clay, different configurations polymer–clay nanocomposites exist: intercalated, flocculated, exfoliated nanocomposites. In this paper, a study first two is presented. Poly(vinyl alcohol) (PVA)–Cloisite® 20A was chosen for intercalated system PVA–Cloisite®...

10.1002/vnl.21496 article EN Journal of Vinyl and Additive Technology 2015-06-22

10.1016/j.ijporl.2016.03.007 article EN International Journal of Pediatric Otorhinolaryngology 2016-03-18

Children with down syndrome (DS) are more liable to develop obstructive sleep apnea (OSA) which is usually treated adenotonsillectomy. However, OSA may persist in many of those patients after the procedure. The aim this study was assess efficacy drug-induced endoscopy (DISE)-directed treatment management DS children persistent Sixteen adenotonsillectomy were evaluated. DISE done operating theatre identify site obstruction, and surgical intervention performed according finding....

10.1097/scs.0000000000008246 article EN Journal of Craniofacial Surgery 2022-02-07

We compared the efficacy of various methods processing cryopreserved-thawed samples for recovery functionally adequate spermatozoa as assessed by response to sperm stress test (SST), an index temperature activated membrane lipid peroxidation, and immediate delayed changes in viability motion parameters. Donor semen (n = 28) were divided into six equal parts, one part was used control remaining parts compare five follows: direct Percoll gradient processing, washing one-step or stepwise...

10.1093/humrep/13.8.2151 article EN Human Reproduction 1998-08-01

Galectin-3 plays critical roles in the adhesion, proliferation, and differentiation of tumor cells. Recent data have suggested that galectin-3 a role development hepatocellular carcinoma (HCC); however, its prognostic value has not been validated. The aim our study was to evaluate clinical patients with HCC.

10.36401/jipo-24-6 article EN cc-by-nc-nd Journal of Immunotherapy and Precision Oncology 2024-09-09

10.1016/0304-4017(92)90058-h article EN Veterinary Parasitology 1992-06-01

Quail meats have many advantages and superiority one the other species of poultry. This study was planned to throw plenty light on gross chemical composition, lipid fractions, fatty acids amino thigh breast male female wild quail meat as well microbiological quality. The mean values moisture, protein, fat, ash energy contents ranged from 60.1 69.2%, 55.0 68.8%, 28.8 42.1%, 2.40 3.63% 696 1000 kJ, respectively. Seven fractions lipids (phospholipids, monoglycerides, cholesterol, diglycerides,...

10.1002/1521-3803(20010101)45:1<50::aid-food50>3.0.co;2-j article EN Nahrung/Food 2001-01-01
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