This study is concerned with the identification of the validity of the Recent sediments deposited in the Playa for the purpose of making the laboratory bricks by extrusion and pressing. The steps followed in this study included the formation and then burning of the pyramids at (950-1100) C° for one hour of maturity to determine their applicability to the brick industry. The study area is located in Al Muthanna province, south of Iraq. It is located south of the district of Samawah at a distance of 80 km and to the north-west of Salman district, 64 kilometers south of Baghdad, represented by three hosts: (DHS 1, DH2 and S). The results of the chemical analysis of the study samples showed that they consist of the following major oxides: SiO2 = (39.34-42.82) TiO2 = (0.52-0.76) Na2O3 = (0.97-1.22) Fe2O3 = (4.19-5.89) CaO = (14.78-19.4) K2O = (0.91-1.14) Al2O3 = (8.02-9.85) MgO = (3.85-5.95) L.O.I = (16.31-19.32) silica SiO2 represented the highest ratio followed by Al2O3. Was manufactured 36 samples of the laboratory were manufactured and prepared by extrusion method were measured in dimensions (7 * 3.5 * 2.5) cm by extruding method and were burned at (950-1100) C° for the purpose of conducting physical and mechanical checks on them including Linear and volume shrinkage, color, Water absorption, Efforescence, and compressive strength. The results of these tests showed a decrease in water absorption and Efforescence, a decrease in the values of compressive strength with increased burning temperature, decreased Linearand volume shrinkage in most samples and increased in other samples with increasing burning temperature. In addition, 12 samples were made of the cylindrical laboratory size (diameter 50 mm, height 60 mm) in semi-dry pressing method, and were burned at (950-1100) C° for the purpose of physical and mechanical tests, color, Water absorption, Efforescence, and compressive strength. The results of these tests showed a decrease in water absorption and Efforescence and an increase in the values of compressive resistance while increasing the temperature of burning, while the colors of the samples ranged from light brown and yellow or pale yellow to white. The results of physical assays were met Linear and volume shrinkage, color, Water absorption and Efforescence. As well as mechanical tests: compressive strength results were in accordance with the Iraqi standard for this industry where the data of the results of this study showed the validity of these samples for the industry mentioned above.
In this work ,pure and doped(CdO)thin films with different concentration of V2O5x (0.0, 0.05, 0.1 ) wt.% have been prepared on glass substrate at room temperature using Pulse Laser Deposition technique(PLD).The focused Nd:YAG laser beam at 800 mJ with a frequency second radiation at 1064 nm (pulse width 9 ns) repetition frequency (6 Hz), for 500 laser pulses incident on the target surface At first ,The pellets of (CdO)1-x(V2O5)x at different V2O5 contents were sintered to a temperature of 773K for one hours.Then films of (CdO)1-x(V2O5)x have been prepared.The structure of the thin films was examined by using (XRD) analysis..Hall effect has been measured in orded to know the type of conductivity, Finally the solar cell and the effici
... Show More
Evaluation of trace elements in Iraqi chewing gums are unavailable, particularly pollution of toxic elements, materials which change the values of PH in the Oral. Atomic Absorption Spectroscopy (AAS) were successfully employed to determine the concentration of 7 trace elements (essentially toxic and nonessential) and the PH, in thirteen different brands of chewing gum generally consumed in Iraq. Combined wet and dry digestion procedures were applied. Two types of heated graphite tubes were used, coated and uncoated tubes treated with tungsten solution. Result showed that Cu, Al and Zn were at very high levels in almost all brands whereas Mn was found to be high in brands A and O only.
Coupling reaction of 2-amino benzoic acid with 8-hydroxy quinoline gave bidentate azo ligand. The prepared ligand has been identified by Microelemental Analysis,1HNMR,FT-IR and UV-Vis spectroscopic techniques. Treatment of the prepared ligand with the following metal ions (ZnII,CdII and HgII) in aqueous ethanol with a 1:2 M:L ratio and at optimum pH, yielded a series of neutral complexes of the general formula [M(L)2]. The prepared complexes have been characterized by using flame atomic absorption, (C.H.N) Analysis, FT-IR and UV-Vis spectroscopic methods as well as conductivity measurements. The nature of the complexes formed were studied following the mole ratio and continuous variation methods, Beer's law obeyed over a concentration range
... Show MoreThe ring modulator described in part I of this paper is designed here for two operating wavelengths 1550nm and 1310nm. For each wavelength, three structures are designed corresponding to three values of polymer slot widths (40, 50 and 60nm). The performance of these modulators are simulated using COMSOL software (version 4.3b) and the results are discussed and compared with theoretical predictions. The performance of intensity modulation/direct detection short range and long rang optical communication systems incorporating the designed modulators is simulated for 40 and 100Gb/s data rates using Optisystem software (version 12). The results reveal that an average energy per bit as low as 0.05fJ can be obtained when the 1550nm modulator is d
... Show MoreThis paper presents comprehensive analysis and investigation for 1550nm and 1310nm ring optical modulators employing an electro-optic polymer infiltrated silicon-plasmonic hybrid phase shifter. The paper falls into two parts which introduce a theoretical modeling framework and performance assessment of these advanced modulators, respectively. In this part, analytical expressions are derived to characterize the coupling effect in the hybrid phase shifter, transmission function of the modulator, and modulator performance parameters. The results can be used as a guideline to design compact and wideband optical modulators using plasmonic technology