The University of Kufa is an Iraqi university located in Najaf, Iraq. It was founded in 1987 and comprises 12 colleges. The College of Medicine was established a decade earlier and attached to Mustansiriya University. In 1989, the College of Arts was established with only two departments: the Arabic Language Department and the Department of History. In 1991, the regime of Saddam Hussein closed the university after an uprising in March 1991, but two years later it was re-opened. Wikipedia.
Omran Alkhayatt A.H.,University of Kufa |
Hussian S.K.,thanaa University
Materials Letters | Year: 2015
Pure and fluorine highly doped SnO2 (TO and FTO) thin films with different dopant concentrations (0.15, 0.25, 0.35 mol/l) have been prepared by spray pyrolysis technique at substrate temperature 450 °C. The crystal structure and surface morphology of the prepared films were characterized by using X-ray diffraction and scanning electron microscopy SEM. The XRD patterns show polycrystalline structure in nature with tetragonal (rutile) phase. The average crystallite size decreases with increasing of dopant concentrations and its values in the range (32-56) nm which indicate that all films have nanocrystalline structure. The SEM images show a homogeneous and smooth uniform surface with no detectable micro-cracks, the EDX spectra confirm the stoichiometry of the prepared films. The optical properties of the films were investigated by UV-vis spectrophotometer. In the visible range, the optical transmittance (T%) of the films with varying dopant concentrations was found to be (83-98)% and the fundamental absorption edge shifted toward higher energies (blue shift) with increasing of fluorine dopant concentration. The energy band gap value of pure SnO2 was 3.95 eV and it increases to 4.04, 4.08 and 4.1 eV with the increasing of dopant concentration, this behaviors can be attribute to the (B.M) effect or Burstein-Moss shift. © 2015 Published by Elsevier B.V.
Al-Mulla E.A.J.,University of Kufa
Polymer Science - Series A | Year: 2011
In this study, new biopolymer nanocomposites have been prepared. Fatty nitrogen compounds (FNCs); fatty amide (FA), fatty hydroxamic acid (FHA), and carbonyl difatty amide (CDFA), which were synthesized from palm oil, have been used as one of organic compounds to modify natural clay (sodium montmorillonite). The clay modification was carried out by stirring the clay particles in an aqueous solution of FA, FHA, and CDFA by which the clay layer distance increases from 1.23 to 2.71, 2.91 and 3.23 nm, respectively. The modified clay was then used in the preparation of the polylactic acid/epoxidized palm oil (PLA/EPO) blend nanocomposites. The interaction of the modifier in the clay layer was characterized by X-ray diffraction (XRD), and Fourier transform infrared (FTIR). Elemental analysis was used to estimate the presence of FNCs in the clay. The nanocomposites were synthesized by melt blending of the modified clay and PLA/EPO blend at the weight ratio of 80/20. The nanocomposites were then characterized using XRD, transmission electron microscopy (TEM), thermogravimetric analysis (TGA), and tensile properties measurements. The XRD and TEM results confirmed the production of nanocomposites. PLA/EPO modified clay nanocomposites show higher thermal stability and significant improvement of mechanical properties in comparison with those of the PLA/EPO blend. © 2011 Pleiades Publishing, Ltd.
Al-Mulla E.A.J.,University of Kufa
Fibers and Polymers | Year: 2011
In this study, different organoclays (OMMTs) were prepared using various fatty nitrogen compounds (FNCs) and natural clay, sodium montmorillonite (MMT). The clay modification was carried out by stirring the clay particles in an aqueous solution of fatty amides (FA), fatty hydroxamic acids (FHA), and carbonyl difatty amides (CDFA). These OMMTs were then used for nanocomposites production to improve the property balance of poly(lactic acid) (PLA) by solution casting process. All sets of OMMTs and nanocomposites were characterized using various apparatuses. In the nanocomposites, where the clay surface is pretreated with FA, FHA and CDFA, the basal spacing of the clay increased to 2.94, 3.26 and 3.80 nm, respectively The X-ray diffraction (XRD) and transmission electron microscopy (TEM) results confirmed the production of nanocomposites. PLA modified clay nanocomposites show higher thermal stability and significant improvement of mechanical properties in comparison with pure PLA. © 2011 The Korean Fiber Society and Springer Netherlands.
Yousif N.G.,University of Colorado at Denver |
Al-amran F.G.,University of Kufa
BMC Cardiovascular Disorders | Year: 2011
Background: Cardiac inflammation and generation of oxidative stress are known to contribute to trastuzumab (herceptin) induced cardiac toxicity. Toll-like receptors (TLRs) are a part of the innate immune system and are involved in cardiac stress reactions. Since TLR4 might play a relevant role in cardiac inflammatory signaling, we investigated whether or not TLR4 is involved in trastuzumab induced cardiotoxicity.Methods: Seven days after a single injection of herceptin (2 mg/kg; i.p.), left ventricular pressure volume loops were measured in HeN compotent (TLR4 +/+) and HeJ mutant (TLR4 -/-) treated with trastuzumab and control mice. Immunofluorescent staining for monocyte infiltration and analyses of plasma by (ELISAs) for different chemokines including: MCP-1and tumor necrosis factor-α (TNF-α), Western immunoblotting assay for ICAM-1, and used troponin I for cardiac injury marker.Results: Trastuzumab injection resulted in an impairment of left ventricular function in TLR-4 competent (HeN), in contrast TLR4 -/ -trastuzumab mice showed improved left ventricular function EF%, CO; p < 0.05, attenuation of mononuclear cell infiltration in TLR4 -/-; p < 0.05 vs.TLR-4 competent (HeN), reduced level of cytokines TNF-α, MCP-1 and ICAM-1 expression in TLR4 -/-, marked reduction of myocardial troponin-I levels in TLR4-deficient mice. Data are presented as means ± SE; n = 8 in each group p < 0.05 vs.TLR-4 competent (HeN).Conclusions: Treatment with trastuzumab induces an inflammatory response that contributes to myocardial tissue TLR4 mediates chemokine expression (TNF-α, MCP-1and ICAM-1), so in experimental animals TLR4 deficiency improves left ventricular function and attenuates pathophysiological key mechanisms in trastuzumab induced cardiomyopathy. © 2011 Yousif and Al-amran; licensee BioMed Central Ltd.
Al-Mulla E.A.J.,University of Kufa
Advanced Materials Research | Year: 2012
In this study, difatty acyl urea (DFAU), synthesized from palm oil, and natural clay (sodium montmorillonite) were used to prepare organoclay (OMMT). The clay modification was carried out by stirring the clay particles in an aqueous solution of DFAU at which the clay layer thickness increased from 1.25 to 2.82. This OMMT was then used for nanocomposite production to improve the property balance of poly(lactic acid) (PLA) by solution casting process. The nanocomposite was characterized using various apparatuses. The X-ray diffraction (XRD) and transmission electron microscopy (TEM) results confirmed the production of nanocomposite. PLA modified clay nanocomposite shows higher thermal stability and significant improvement of mechanical properties in comparison with pure PLA. The use of DFAU as a modifier will reduce the dependence on petroleum-based surfactant. In addition to its applications such as films and textile fibers, this nanocomposite represents a good candidate to produce disposable packaging because they have good mechanical, thermal properties, fabricability and processability.