Khalaf Ali Fayez Abuamra

استاذ - أستاذ متفرغ

كلية العلوم

العنوان: قسم النبات والميكروبيولوجى -كلية العلوم -جامعة سوهاج



المنشورات و المؤلفات التي تحتوي علي الكلمة المفتاحية: XRD

2018-09-16 10:01:56 الكلمات المفتاحية XRD, EDX, Red spots, weathering, deterioration, Granite,
15.	Analytical investigations of disintegrated granite surface from the Un-finished obelisk in Aswan  Int. J. of ArchaeoScience, Vol. 35
The deterioration of natural stone monuments is subjected to different external reasons that take place through different weathering factors, in addition to other several factors concerning the stone itself “internal reasons” mainly pore structure and permeability index. All of these factors lead to the formation of altered surface layers, then damaging the original stone components. Here, red weathering, one of ... إقراء المزيد

2018-09-16 10:20:59 الكلمات المفتاحية Brick, External casing, Deterioration problems, EDX, XRD, SEM,
20.	 Characterization of brick used in the external casing of Roman bath walls "Gedara-Jordan" x
The use of sub-soil materials have been used in buildings long time ago, for more than 10,000 years. This study investigates the different characteristics of brick units used in one of the Roman baths in Gadara archaeological site. This is achieved by studying the raw materials and the different technological measurements of brick units: shapes, dimensions and visual description. Moreover, ... إقراء المزيد

2018-09-04 06:19:19 الكلمات المفتاحية nanoparticles, XRD, IR, Magnetic Electric, Spinel, Co3O4, Fe2O3, TEM, Thermal Decomposition,
Electric, thermoelectric and magnetic characterization of γ-Fe2O3 and Co3O4 nanoparticles synthesized by facile thermal decomposition of metal-Schiff base complexes
Using novel compounds for synthesis of metal oxide nanomaterials can tune their physical properties due to the associated variation in the shape, size and crystallinity. In this work, γ-Fe2O3 and Co3O4 nanoparticles were successfully prepared by a facile thermal decomposition route, employing [Fe(C32H22N4O2)]·2H2O and [Co(C16H11N3O4)].12">12H2O complexes, respectively as new precursors. The x-ray diffraction and high resolution transmission electron microscopy investigation ... إقراء المزيد

2018-09-11 14:58:39 الكلمات المفتاحية XRD, SEM, TEM, Nano structures, Chemical synthesis, EDAX, Rietveld analysis, Magnetometer,
Effect of chromium substitution on the structural and magnetic properties of nanocrystalline zinc ferrite
Single-phase Cr doped zinc ferrites have been synthesized by hydrothermal method. The crystal structure, microstructure, crystallite size and distribution, composition and magnetic properties of the synthesized nanoparticles were determined using X-ray powder diffraction, electron microscopies and vibrating sample magnetometry. Powders are composed of ultrafine spherical nanoparticles with a highly homogeneous elemental composition. The nanoparticles have partially inversed cubic spinel structure ... إقراء المزيد

2018-09-09 09:01:23 الكلمات المفتاحية XRD, SEM, α-Bi2O3, nanorods, TEM, FTIR, photocatalyst, characterization,
α-Bi2O3 nanorods: synthesis, characterization and UV-photocatalytic activity
In this study, Monoclinic bismuth oxide nanorods (_α_-Bi2O3 NRs) were successfully synthesized by a simple one-step hydrothermal route using (water: ethanol) (1:1) as a mixed solvents at optimum conditions. The Bi2O3 nano-powder was characterized in detail by different techniques in terms of their structural, morphological, compositional, optical and photocatalytic properties. X-ray diffraction (XRD) analysis indicated that the as-synthesized Bi2O3 NRs ... إقراء المزيد

2018-09-11 15:35:36 الكلمات المفتاحية TEM, XRD, Removal, Lead, Biosorbent, Kinetic parameters, Biosorption capacities, Delonix regia pod,
Removal of Toxic Pb(II) Ions from Aqueous Solution by Nano Sized Flamboyant Pod (Delonix regia)
The removing of toxic heavy metals from aqueous solution by agricultural biosorbents was investigated by studying the effect of nano sized (Delonix regia) and chemically modified biosorbent citric acid Delonix regia (CADR) for removing of Pb2+ ions. TEM, XRD and EDS, FT-IR, SEM methods were used for characterizing the biosorbent(Delonix regia). The effect of contact time, pH,temperature, dosage of biosorbent, ... إقراء المزيد

2018-09-04 06:29:35 الكلمات المفتاحية ZnFe 2O 4 nanoparticles, superparamagnetic materials, imidazoles, efficient catalyst , TEM, SEM, EDAX, XRD,
Hydrothermal preparation and characterization of ZnFe2O4 magnetic nanoparticles as  catalyst for the synthesis of multi‐substituted imidazoles
Nanoparticles are key focus of research for a wide range of novel applications. As such, ZnFe2O4 magnetic nanoparticles were synthesized hydrothermally and characterized via scanning and transmission electron microscopies, powder X‐ray diffraction, energy‐dispersive X‐ray and infrared spectroscopies, thermogravimetric analysis and magnetic measurements. They were used as a robust catalyst for the synthesis of a series of biologically active multi‐substituted imidazoles ... إقراء المزيد

Sonochemical synthesis, structural inspection and semiconductor behavior of three new nano sized Cu(II), Co(II) and Ni(II) chelates
Three novel nanosized Cu(II), Co(II) and Ni(II) complexes of imine ligand attained from the condensation of 2‐amino‐3‐hydroxypyridine and 3‐methoxysalicylaldehyde have been prepared and investigated using diverse chemical methods such as NMR, CHN analysis, conductance, IR, Spectral studies, TGA and magnetic moment measurements. The obtained data confirmed that the synthesized complexes have metal: ligand ratio of 1:1 and octahedral geometry for ... إقراء المزيد

A robust synthesis and characterization of superparamagnetic CoFe2O4 nanoparticles as an efficient and reusable catalyst for green synthesis of some heterocyclic rings
A robust synthesis for magnetic CoFe2O4 nanoparticles via a hydrothermal technique was investigated. The prepared magnetic nanoparticles were characterized using powder X‐ray diffraction, scanning, transmission and high‐resolution transmission electron microscopies, energy‐dispersive X‐ray and infrared spectroscopies, thermogravimetric analysis and vibrating sample magnetometry. Based on the obtained data, the prepared powder was composed of ultrafine particles in nanometer size range with highly ... إقراء المزيد

2018-09-03 15:32:22 الكلمات المفتاحية Magnetic nanoparticles; Nanotechnology; , Functiolization, Drug delivery, TEM, SEM, XRD,
Functionalization of Magnetic Nanoparticles for Drug Delivery
Magnetic nanoparticles (MNPs) possess unique magnetic properties and the ability to function at the cellular and molecular level of biological interactions making them an attractive platform as carriers for drug delivery. Recent advances in nanotechnology have improved the ability to specifically tailor the features and properties of MNPs for these biomedical applications. To better address specific clinical needs, MNPs with ... إقراء المزيد