ahmed_askalany

Dr. ahmed askalany

Lecturer -

Faculty of industrial education

Address: برج الحمد - دماريس - المنيا

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Publications Which contain the keyword: TEM


2018-11-17 06:02:37 Keywords Doping, TEM, SEM, XRD, superparamagnetic materials, Ferrites, VSM,
Doping of Nano Zinc  Ferrites by Chromium: Structural and Magnetic Properties Studies
A SERIES OF CHROMIUM-SUBSTITUTED ZINC FERRITES (CRXZN FE2-XO4 WITH = 0.00, 0.10, 0.20, 0.30, 0.40) WERE SYNTHESIZED VIA HYDROTHERMAL METHOD. THE STRUCTURAL CHARACTERIZATIONS OF ALL THE PREPARED SAMPLES WERE DONE USING XRD, FTIR AND EDAX, TEM, HR-TEM AND TGA MEASUREMENTS . THESE STUDIES CONFIRMED THE FORMATION OF SINGLE-PHASE INVERSE SPINEL STRUCTURE IN ALL THE COMPOSITIONS. FROM HR-TEM MEASURMENTS, CRYSTALLINITY ARE ... Read more

2018-11-01 03:02:10 Keywords Au-Pd supported catalysts, XAFS/DRIFTS, EXAFS, TEM,
Restructuring of AuPd Nanoparticles Studied by a Combined XAFS/DRIFTS Approach
The use of AuPd nanoparticles in catalysis is widespread, with the activity being attributed to their precise structural properties. We demonstrate the restructuring of AuPd nanoparticles under CO oxidation conditions using a combined XAFS/DRIFTS approach. The fresh catalyst exhibits PdO islands at the surface of the nanoparticles, which are reduced under reaction conditions, a process observed via both DRIFTS and ... Read more

2018-10-31 03:55:02 Keywords Spergiarszoa, , .s;13M, , ·:TEM, S, SEM, TEM, spermatozoa,
Electron Microscopic Study Of Spermatozoa In Smokers.
Objectives: .'I:o detect the .. effect of cigarette smoking onssemen parameters, detectefhe morphological abnormalities by scanning electron microscope (SBM) and to detect the ,pltra· structural changes by using transmission electron microscope (TEM): · ,· .. . " Setting; (?utpatjent clinic o;J; Dermatology and Venereology Department, So~ag University Hospitals ir1d Electron Microscope Uriit at So hag Faculty of Science. " ·' ... Read more

A Robust Synthesis of Magnetite Nanoparticles of Desired Size and the Functionalization Thereof
The synthesis of magnetite nanoparticles is an area of permanent interest in view of their high technological applications including Biomedicine and Biosensing. These nanoparticles are used as enhanced magnetic resonance imaging (MRI) agents, for biological separation and magnetic drug delivery systems, and magnetic hyperthermia treatment [1]. Magnetite nanoparticles of about 20 nm in diameter and low polydispersity were prepared heating ... Read more

Sol–gel Derived Mixed Oxide Zirconia: Titania Green Heterogeneous Catalysts and Their Performance in Acridine Derivatives Synthesis
Various zirconia content in ZrO2–TiO2 mixed oxide catalysts (x=5, 10, 20 ZrO2wt%) were synthesized by cost-effective sol–gel process and characterized by different techniques, i.e. XRD diffraction patterns, TG– DTA analyses, FTIR spectroscopy, N2 adsorption/desorp-tion measurements, and TEM microscope. The investiga-tion of the acidic/basic properties was studied by means of FTIR spectroscopy using pyridine as an adsorbed mole-cule. Characterization estimates exhibit ... Read more

Removal of Cd(II) ions From Aqueous Solution using Nano sized Moringa Oleifera
This research aims to study the effect of nano sized _Moringa oleifera_ on adsorption of Cd2+ ions from aqueous solution. The investigated biosorbent was characterized by FTIR, SEM, TEM, XRD and EDS techniques. The influence of pH, temperature, adsorbent dosage, contact time, metal ion concentration and chemical treatment of biomass were investigated. The maximum capacity (qm) of Cd2+ ions biosorption ... Read more

Doping of Nano Cobalt Ferrites by Cupper: Structural and Magnetic Properties Studies
A series of Cupper-substituted cobalt nano ferrites (CuxCo1-x Fe2O4 with = 0.00, 0.10, 0.20, 0.30 and 0.4) was synthesized via hydrothermal method. The structural characterizations of all the prepared nanoparticles were performed using powder x-ray diffraction, EDAX and FTIR analyses. These studies confirmed the formation of single-phase spinel structure in at lower compositions. The increase in the value of lattice ... Read more

Nano sized ternary Cu(II) complexes Encompassing Salicylaldehyde Derivatives and Amino Acids as an Effective Strategy for Antimicrobial Activity Improvement and DNA Interaction
A series of ternary Cu(II) complexes encompassing ONO donor Schiff base amino acid ligands were synthesized from condensation of 3–methoxysalicylaldehyde (MS) or 4-diethylamino salicylaldehyde (DS) with α-amino acids (L-phenylalanine (Phe), L-histidine (His), DL-tryptophan (Trp)) as primary ligand and 2, 4-bipridyl (DP) as secondary ligand. All the prepared compounds were characterized by melting points, decomposition temperatures, elemental analysis, UV-Vis, IR spectra, ... Read more

Disposal of Heavy Transition Cd(II) ions from Aqueous Solution utilizing Nano Sized Flamboyant Pod (Delonix regia)
The absorption of toxic heavy metal by natural adsorbents from water were indicated by investigation the effect of nano sized (_Delonix regia _(DR)) and (CADR) citric acid_ Delonix regia_ chemically modified adsorbent for removing the Cd2+ ions. Different techniques were employed for characterizing the adsorbent (_Delonix regia_) such energy dispersive analysis of X-ray (EDAX), Fourier transform infrared spectroscopy (FT-IR), Transmission ... Read more