Ayman Y. El-Khateeb

ORCID: 0000-0003-4014-524X
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Research Areas
  • Essential Oils and Antimicrobial Activity
  • Phytochemicals and Antioxidant Activities
  • Adsorption and biosorption for pollutant removal
  • Selenium in Biological Systems
  • Plant Pathogens and Fungal Diseases
  • Postharvest Quality and Shelf Life Management
  • Corrosion Behavior and Inhibition
  • Moringa oleifera research and applications
  • Chromium effects and bioremediation
  • Nanoparticles: synthesis and applications
  • Natural Antidiabetic Agents Studies
  • Medicinal Plant Research
  • Plant Physiology and Cultivation Studies
  • Plant-Microbe Interactions and Immunity
  • Plant tissue culture and regeneration
  • Multicomponent Synthesis of Heterocycles
  • Concrete Corrosion and Durability
  • Synthesis and biological activity
  • Rabbits: Nutrition, Reproduction, Health
  • Animal Nutrition and Physiology
  • Plant Pathogens and Resistance
  • Constructed Wetlands for Wastewater Treatment
  • Plant Micronutrient Interactions and Effects
  • Plant Growth Enhancement Techniques
  • Horticultural and Viticultural Research

Mansoura University
2015-2024

Agricultural Research Center
2017-2019

Zagazig University
2015

Biosynthesis of Ag@SeO 2 NC using turmeric extract with promising antibacterial and antioxidant properties, optimized AI, confirmed by various techniques.

10.1039/d4ra00004h article EN cc-by RSC Advances 2024-01-01

Ginger and garlic plants were used for the preparation of water ethanolic extracts. The silver, copper, iron zinc nanoparticles eco-friendly synthesized using ginger extracts their antioxidant antibacterial activities evaluated. growth was complemented with characterization TEM UV–Vis spectroscopic analysis. Transmission electron microscopy revealed presence mono-dispersed metals silver have smallest particle size around 10.10–18.33 nm. investigated samples evaluated as agents against...

10.1007/s40097-018-0255-8 article EN cc-by Journal of nanostructure in chemistry 2018-02-13

Volatile components in the extracts of basil leaves (Ocimum basilicum L.) were identified by gas chromatography/mass spectrometry (GC/MS) with electron ionization (EI) mode. The major volatile under investigation are α-pinene, sabinene, β-pinene, d-limonene, eucalyptol, l-linalool and estragole. Electron mass spectra these compounds have been obtained investigated. Furthermore, semi-empirical MNDO [Modified Neglect Diatomic Overlap] method was used to calculate thermochemical data for...

10.4236/ijamsc.2016.41002 article EN International Journal of Analytical Mass Spectrometry and Chromatography 2016-01-01

Abstract Chromium is one of the heavy metal pollutants that causing risky health issues when discharged into aquatic ecosystems. The current investigation focused on bioremoval Cr 6+ depending bacterial sorption process by using Pseudomonas sp. NEWG-2 which was identified basis morphological, cultural characteristics, 16S rRNA sequencing and phylogenetic analysis as alcaliphila strain NEWG-2. It clear from FCCD experiments bacterium can grow normally remove 96.60% 200 mg/l yeast extract (5.6...

10.1038/s41598-020-70473-5 article EN cc-by Scientific Reports 2020-08-20

The current work aimed to synthesize selenium and zinc nanoparticles using the aqueous extract of Ephedra aphylla as a valuable medicinal plant. prepared were characterized by TEM, zeta potential, changes in phytochemical constituents. Hence, phenolic, flavonoid, tannin contents reduced case samples than original values extract. its showed high potency antioxidant agents result DPPH• assay. assessed anticancer against six tumor cells normal lung fibroblast (WI-38) cell line. revealed very...

10.3390/biom11030470 article EN cc-by Biomolecules 2021-03-22

The present study was carried out to evaluate the role of Nigella sativa Linn (NsL) oil against subacute tramadol-induced hepatotoxicity, nephrotoxicity as well oxidative stress in adult male albino rats. Sixty rats were divided into four groups. Group I: control group; 30 equally subdivided into: Ia; -ve group, Ib; +ve group received saline, Ic; corn oil. II: 10 NsL oil; 1 mg/kg ml oil/day, III: tramadol; mg/kg/day, IV: tramadol + previous doses. Treatments given by gavage for days. Then...

10.1016/j.toxrep.2015.03.002 article EN cc-by-nc-nd Toxicology Reports 2015-01-01

Abstract Heavy metals, including chromium, are associated with developed industrialization and technological processes, causing imbalanced ecosystems severe health concerns. The current study is of supreme priority because there no previous work that dealt the modeling optimization biosorption process by immobilized cells. significant parameters (immobilized bacterial cells, contact time, initial Cr 6+ concentrations), affecting Pseudomonas alcaliphila , was verified, using Plackett–Burman...

10.1038/s41598-021-81348-8 article EN cc-by Scientific Reports 2021-01-18

Background Selenium nanoparticles (SeNPs) were synthesized using a green method with Pediastrum boryanum extract as the reducing and capping agent. Objectives The algal SeNPs characterized for their morphological characters biological efficacy. Methods Characterization was conducted UV-vis spectroscopy, Fourier transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM), zeta potential analysis. Results TEM revealed spherical tetragonal sizes ranging from 72.16-89.45 nm....

10.35943/2682-2512.1229 article EN cc-by Mansoura Veterinary Medical Journal 2024-01-01

et al. [13].Grape-vine leaves possesses a resistance towards several fungus diseases as Plasmopara viticola, Oidium tukeri and Botrytis cinerea which cause downy mildew, powdery mildew fruit rot, respectively [14].Flavonoids including quercetin quercetin-3-O-[β-xylosyl-(1-2)-α-rhamnoside] 4'-O-α-rhamnoside bioactive compounds were secluded from Zizyphus spina-christi [15].Also, various gallic acid derivatives isolated the of Punica granatum such 1,2,3-tri-O-galloyl-β-glucopyranose,...

10.4172/2157-7471.1000199 article EN Journal of Plant Pathology & Microbiology 2013-01-01

Heavy metals are environmental pollutants affect the integrity and distribution of living organisms in ecosystem also humans across food chain. The study targeted removal copper (Cu2+) from aqueous solutions, depending on biosorption process. bacterial candidate was identified using 16S rRNA sequencing phylogenetic analysis, addition to morphological cultural properties as Azotobacter nigricans NEWG-1. Box-Behnken design applied optimize by NEWG-1 possible interactive effects between...

10.1038/s41598-020-66101-x article EN cc-by Scientific Reports 2020-06-11

Abstract Remazol brilliant blue (RBB) is an anthraquinone anionic dye that has several commercial uses, especially in the textile industries and well-known for its detrimental impacts on marine life surrounding ecosystem. Mercury (Hg 2+ ) also one of most severe hazardous environmental contaminants due to bioaccumulation through food chain high toxicity human embryo fetus. The biosorption potential Gelidium corneum biomass bioremoval Hg RBB simultaneously from binary mixture was assessed....

10.1038/s41598-021-00158-0 article EN cc-by Scientific Reports 2021-10-22

The definitive screening design (DSD) and artificial neural network (ANN) were conducted for modeling the biosorption of Co(II) by Pseudomonas alcaliphila NEWG-2. Factors such as peptone, incubation time, pH, glycerol, glucose, K2HPO4, initial cobalt had a significant effect on process. MgSO4 was only insignificant factor. DSD model invalid could not forecast prediction removal, owing to lack-of-fit (P < 0.0001). Decisively, ability ANN accurate with prominent response training (R2 = 0.9779)...

10.3389/fmicb.2022.893603 article EN cc-by Frontiers in Microbiology 2022-05-31

Abstract This study was divided into two parts. The first part, the determination of methicillin-resistant Staphylococcus aureus (MRSA) prevalence in 25 broiler chicken farms, with detection multidrug resistant MRSA strains. 31.8% (159 out 500 samples) at level birds and it 27% (27 100) environmental samples. highest antimicrobial resistance recovered strains recorded to streptomycin (96%). All isolates (100%) had (MDR) four or more antibiotics 16 distinct antibiotic patterns, multiple index...

10.1038/s41598-024-55114-5 article EN cc-by Scientific Reports 2024-02-26

Green synthesis of metal nanoparticles using plant extracts offers a safe and attractive alternate to the chemical methods. The present work aims at preparing rhus (Rhus coriaria L.) safflower (Carthamus tinctorius Fe2+, Cu2+, Zn2+, Ag+ ions. water were prepared, total polyphenols flavonoids contents determined. extract contained highest number (87.20 mg GAE/g 36.32 QE/g), respectively. synthesized characterized UV-Visible (UV-Vis) spectroscopy Transmission Electron Microscope (TEM). studied...

10.3390/foods8040139 article EN cc-by Foods 2019-04-23

The aim of this study was to evaluate fig (Ficus carica L.) leaves' extract (FLE), olive (Olea europaea (OLE), and their mixture (MLE), extend the shelf life pasteurized milk. OLE, FLE, MLE (1:1) were added milk in different concentrations (0.2%, 0.4%, 0.6%). Several tests then conducted determine activity these extracts. antioxidant as IC50 determined by using DPPH radical assay. FLE showed higher (30.21 µg/mL) compared OLE (22.43 µg/mL). Phenolic compounds identified high-performance...

10.3390/foods9050615 article EN cc-by Foods 2020-05-11

In the present study, 200 Brown commercial egg-type layers (60 wk old) were used to study effects of different levels ecofriendly synthesis calcium (Ca) nanoparticles (0.0, 0.50, 1.0, and 1.5 g/kg diet) with biocompatible Sargassum latifolium algae extract (SL-CaNps) on exterior egg quality traits, electronic microscopic view eggshells, Ca phosphorus (P) retention, serum P concentrations, histology uterus. Hens fed dietary SL-CaNps powder had higher weight shell % values than those control...

10.1016/j.psj.2020.10.043 article EN cc-by-nc-nd Poultry Science 2020-11-05

Our present study was designed to investigate the role of both Trichoderma harzianum and chamomile (Matricaria chamomilla L.) flower extract in mutual reaction against growth Pythium ultimum. In vitro, activity found reduce radial ultimum up 30% compared control. Whereas, reduction effect T. P. reached 81.6% after 120 h. Data also showed productivity total phenolics flavonoids by harzianum, 12.18 6.33 mg QE/100 mL culture filtrate, respectively. However, these compounds were determined at...

10.3390/molecules26041178 article EN cc-by Molecules 2021-02-22

This study was carried out to produce new herbal beverages from Foeniculum vulgare and Cymbopogon proximus using for inhibiting or preventing calcium oxalate crystals formation. The preliminary chemical composition phytochemical tests of F. C. have been examined. Also, total polyphenols flavonoids contents were determined. Our results illustrated that contained average values 9.5 13.25 mg GAE/g polyphenols, respectively, while the concentration 5.25 3.5 QE/g proximus, respectively....

10.1016/j.aoas.2013.07.006 article EN cc-by-nc-nd Annals of Agricultural Sciences 2013-09-06
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