Correlation Between Mechanical Properties of Garnet Ferrite Crystal Dy₃Fe₅O₁₂with their IR Data

This research aims to prepare samples of garnet ferrite Dy₃Fe₅O₁₂doping with Ni –content (x=0.00;0.15; 0.25; 0.35; 0.45; 0.50)using the ceramic method

Study the optimal conditions for the preparation of hydroxyapatite in the three-component system: Ca (NO3)2- (NH4)2HPO4- NH3.H2O to be used medically

The aim of this research is to study the optimal conditions for the preparation of hydroxyapatite , Chemical formula: Ca10(PO4)6(OH)2 (HA). In the three-component system: Ca(NO3)2-(NH4)2HPO4-NH3.H2O , Calcium Nitrate was prepared based on the calcification of the white eggshell . to obtain calcium oxide (CaO), which is treated with nitrogen acid, while ammonium phosphate Mono hydrogen and ammonium solution was taken from its pure packaging. Hydroxyapatite (HA) Ca10 (PO4) 6 (OH)2was prepared under specific conditions, mainly: concentration of solutions used, speed of addition of reagents, reaction mix temperature, rotational speed, purity of materials used, and pH of the solution. The study showed that the solid compound recorded in the three-component system, which was separated from the liquid phase and dried and chemically analyzed, has the total chemical formula Ca10 (PO4) 6 (OH)2 and has a Molar ratio of Ca / P= 1.666 . and the preparation process was better in the model burned from the dried model and confirmed by the study of samples of the models dried and burned by IR infrared spectroscopy and XRD X ray diffraction spectroscopy, The burner model was a crystalline product, but in the dried model the output was mixed crystalline and not crystalline.

Structural effect of organophosphorus compounds containing P-NH-P backbone on the Extraction of cadmium (II)

Three organic phosphorous compounds containing bridge with (PhO) phenoxide and (Ph) phenyl group, to be used as materials derived element cadmium ion according to the (liquid - liquid) extraction method that apply to widely used in the restoration of metal ions operations starting from aqueous solutions in mining operations to environmental applications, and identified some of the physical properties (melting point, spectra UV, IR). Photometric method was adopted to determine the concentrations, as it used the solution of 2-Nitroso, 1- Naphthol to determine the concentrations of cadmium ion in the aqueous phase after extraction and its concentrations in the organic phase based on the difference between the concentrations of primitive prepared aqueous solution and the final concentrations in the aqueous phase. Distribution Ratio DCd was studied of the ion cadmium between the aqueous medium of the acid solution of Sulfuric and central Organic Dilutions containing different concentrations of the previous prepared organophosphorus compounds also was studied the Distribution Ratio DCd of ion cadmium depending of changing of pH-values in aqueous medium and central organic Includes fixed concentration from the previous prepared organophosphorus compounds and registered the distribution of information focus numerically and graphically.

The Reaction of some triazole derivatives with 1-halogen esters

In this research, we have used eco-friendly method to prepare four derivatives of 1,2,4-triazole Esters by using the following general nucleophilic substitution reaction.

The chemical compound hydroxyapatite preparation depending on the peel chicken eggs as a natural resource to be used medically

In this research study of the conditions necessary for the preparation of a chemical compound hydroxyapatite HA [HA: Ca10 (PO4) 6 (OH) 2] Depending on normal vital source ( eggshell ) , which contains a large amount of calcium carbonate , which will be dealt with Acetic acid for acetate calcium Ca (CH3COO)2 , which in turn will be dealt with disodium hydrogen phosphate Na2HPO4, where and to prepare the treatment process depends on several factors , including: the concentration of the solutions , Solution temperature, stirring speed and addition , the degree of purity of the material used and its source, and the pH of the solution PH . The study showed that the chemical formula of the compound outlined in the bunting record is: Ca10 (PO4) 6 (OH) 2 and has a Molar ratio Ca / P stood at 1.65344 and preparation process was the best in the burned model of the form , dried and this was confirmed by sampling study of the two models , dried and burned in IR spectroscopy and spectroscopy x-ray diffraction XRD where the burned model output was crystalline either in the form of dried product was mixed crystalline and crystalline .

Improving Arabic Information Retrieval Results Semantically Using Ontology

This research proposes a new way to improve the search outcome of Arabic semantics by abstractly summarizing the Arabic texts (Abstractive Summary) using natural language processing algorithms(NLP),Word Sense Disambiguation (WSD) and techniques of measuring Semantic Similarity in Arabic WordNet Ontology.

A half-numeric method for Calculation the volume resulting from the intersection of a cylinder with a ball as a function of the impact parameter by using the Mathematical program mathCAD

We have developed an analytic expression for the volume of intersection of any cylinder with any sphere in the usual threedimensional space, and give examples of its usefulness for physics. Produced from surface collisions either elastic collision, or inelastic collision, for the incoming energies greater than the binding energy of the nucleons in the nucleus, the reaction occurs and thus the effective size (what the target nucleus see from the nuclear material in the projectle, and What the projectle see from the nuclear material in the target nucleus) is formed and so for the different collisions parameters .

Using the Electronic Density Functional Theory (DFT) to Studying Some of Uranium Compounds

In this work some of Uranium compounds have been studied using B3LYB/SDDALL Basis set and electron density theory (DFT), That is because of the high accuracy and reliability for the results obtained.

Preparation some of Phenol ethers which have pharmaceutical applications in green method

Phenol derivatives have been reacted with aryl halides under heterogeneous basic catalyst (Amberlyst-21) using 5 mol% Cu(I) Complex as catalyst, [CuClPPh3]4. The typical reaction has been performed between p-cresol and bromobenzene. This reaction is achieved in o-xylene as solvent. However, the catalyst complex does not dissolve in toluene rather it acts as heterogeneous catalyst. Therefore, it is filtrated at the end of the reaction and reused several times. Accordingly, new compounds were prepared by reacting one of the bromoaryl derivatives with paracetamol. It is anticipated that the synthesized compounds may have pharmaceutical application as non-steroidial anti-inflammatory drugs (NSAIDs).

The Extent of Auditors’ Commitment by Assessment Risks of Material Misstatements at Financial Statement Level

This study aimed to identify the extent of auditors’ commitment by assessment risks of material misstatements at financial statement level. To achieve the study objective a questionnaire was developed that included sub-components of the risks of material misstatements at financial statements level represented by Inherent Risks (IR) and Control Risks (CR); to identify the extent of auditors’ commitment by assessment risks of material misstatements at financial statement level within the research community represented by accredited auditors at Syrian Commission on Financial Markets and Securities (SCFMS). The questionnaires were distributed to a sample of accredited auditors, and then the results were analyzed and the hypotheses were checked using Statistical Package for Social Sciences (SPSS) -version No. 21. The study concluded that there is a high commitment to assess Control Risks (CR) at financial statement level, while having a moderate commitment to assess Inherent Risks (IR) at financial statement level.