A5075484882- Reproductive biology and impacts on aquatic species
- Nuclear physics research studies
- Probiotics and Fermented Foods
- Fish Ecology and Management Studies
- Sperm and Testicular Function
- Microbial Metabolites in Food Biotechnology
- Nuclear Physics and Applications
- Aquaculture Nutrition and Growth
- Atomic and Molecular Physics
- Fish Biology and Ecology Studies
- Genetic and Clinical Aspects of Sex Determination and Chromosomal Abnormalities
- Advanced NMR Techniques and Applications
- Quantum Chromodynamics and Particle Interactions
- Viral gastroenteritis research and epidemiology
- Enzyme Production and Characterization
- Antimicrobial Peptides and Activities
- Amphibian and Reptile Biology
- Clostridium difficile and Clostridium perfringens research
- Gut microbiota and health
- Microbial Inactivation Methods
- Ion-surface interactions and analysis
- Animal Diversity and Health Studies
- Inflammasome and immune disorders
- Astro and Planetary Science
- Biochemical and Structural Characterization
National Research Centre
2012-2024
GTx (United States)
2024
Kazan Federal University
2023
Kafrelsheikh University
2014-2015
Cairo University
2015
Centre of Advanced Studies
2014
University of Salzburg
2002-2012
Central Laboratory For Agricultural Expert Systems
2012
University of California, San Diego
2005-2007
Norwich Research Park
2002
Journal Article Toxicological Studies on the Egyptian Cotton Leafworm, Prodenia litura. I. Susceptibility of Different Larval Instars to Insecticides Get access M. E. Eldefrawi, Eldefrawi Search for other works by this author on: Oxford Academic PubMed Google Scholar A. Toppozada, Toppozada N. Mansour, Mansour Zeid Economic Entomology, Volume 57, Issue 4, 1 August 1964, Pages 591–593, https://doi.org/10.1093/jee/57.4.591 Published: 01 1964 history Received: 02 January Accepted: 20 April
The involvement of nicotinamide adenine nucleotides (NAD(+), NADH) in the regulation glycolysis Lactococcus lactis was investigated by using (13)C and (31)P NMR to monitor vivo kinetics pools NAD(+), NADH, ATP, inorganic phosphate (P(i)), glycolytic intermediates, end products derived from a pulse glucose. Nicotinic acid specifically labeled on carbon 5 synthesized used growth medium as precursor pyridine allow for detection (13)C-labeled NAD(+) NADH. capacity L. MG1363 regenerate...
Histrionicotoxin from the Colombian frog Dendrobates histrionicus and its perhydro derivative reversibly block acetylcholine-sensitive ion conductance system in neuromuscular preparations. The [3H]perhydrohistrionicotoxin, like histrionicotoxin, caused a significant decrease peak amplitude of end-plate current shortened rise time half-decay time. In membrane preparations Torpedo electroplax, [3H]perhydrohistrionicotoxin bound to limited number high-affinity sites [dissociation constant, (KD)...
The effect of temperature on sperm motility was investigated in brown trout Salmo trutta , burbot Lota lota and grayling Thymallus thymallus using water prolonging saline solution (SMPS) for activation. (4–20° C) spermatozoal enzymes energy supply [malate dehydrogenase (MDH), pyruvate kinase (PK), adenylate (AK)], flagellar movement [Mg 2+ adenosine triposphatase (ATPase)] oxidative defence [peroxidase (POX)] were measured S. L. . Temperatures yielding the highest initial rates swimming...
The spermatozoon of the African catfish Clarias gariepinus is a simple organized aquasperm although it reveals very unique characteristics: cytoplasmic channel lacking, mitochondria form complex structure and arrangement centriolar species specific. Semen has high initial motility rates ( c. 70–90%) swimming velocities 120–140 μm s −1 ), main type linear. Motility duration in water 30 prolonged only to 40 NaCl solutions or more bu ered activating saline solutions. A pH between 7.0 9.0 no e...
Using four different sperm types from brown trout Salmo trutta fario (Salmonidae), chub Leuciscus cephalus (Cyprinidae), burbot Lota lota (Gadidae) and African catfish Clarias gariepinus (Clariidae) the effect of inorganic (cadmium, copper, mercury, lead, zinc nitrite) organic (cyclohexane 2,4‐dichlorophenol) environmental pollutants on motility was investigated. Spermatozoa were activated in double distilled water containing test substances compared to controls similar pH. From investigated...
Siah Mahi, Capoeta capoeta gracilis, is a predominant fish in the river systems of south Caspian Sea basin. Although there evidence geographical divergence this taxon, no information available on morphological differences within subspecies populations. The study was designed to evaluate differentiation Shirud River system basin Iran. A total 120 specimens (≥ 180 mm) were collected from River; 33 morphometric and 10 meristic characteristics recorded for each specimen. standardized data...
More than 300 of the ~6180 known reptile species are critically endangered or endangered, with more 200 amphibian extinct, and ~1230 ~6800 endangered. To assure survival these conservation breeding programs (CBPs) being established. The perpetuation genetic variation is required in both CBPs natural populations, to maintain health reproduction, enable adaptation environmental change. However, over time often lost small fragmented populations. Reproduction technologies including gene banking...
Probiotics, defined as living bacteria that are beneficial for human health, mainly function through their immunomodulatory abilities. Hence, these microorganisms have proven successful treating diseases resulting from immune deregulation. The aim of this study was to find novel candidates improve on and complement current probiotic treatment strategies. Of 60 lactic acid bacterial strains were isolated fecal samples healthy, full-term, breast-fed infants, three chosen because ability...
ABSTRACT The aim of this in vivo study was to evaluate the effects a recombinant probiotic strain, Lactobacillus gasseri NM713, which expresses conserved region streptococcal M6 protein (CRR6), as an oral vaccine against Streptococcus pyogenes . A dose 10 9 cells strain 150 μL PBS buffer administered orally group mice. One control received equivalent Lb. NM613 (containing empty plasmid without insert) or and another buffer. Each contained 30 immunization protocol followed on three...
Food-grade lactic acid bacteria, such as lactobacilli, represent good candidates for the development of mucosal vectors. Indeed, they are generally recognized safe microorganisms and some strains display beneficial effects (probiotics). In this study, we described a new lactobacilli in vivo expression (LIVE) system production delivery therapeutic molecules at surfaces. The versatility functionality was successfully validated several species; furthermore, assessed LIVE two different mouse...
Semen of the African catfish, Clarias gariepinus (Burchell, 1822), was investigated with respect to its cellular composition, sperm cell density, maturation grade, motility and fertility. Storage conditions were tested, whereby viability assessed by measurement after activation fertility tests. Testicular semen differed in i.e. density numbers spermatids, according maturity grade testis. Two types could be distinguished: type I characterized high densities low spermatids II had lower higher...