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تخليق وتشخيص ودراسة الخصائص التفلورية والمضادة لفايروس نقص المناعة المكتسبة لبعض مشتقات البركنينولون الجديدة == Synthesis, Characterization, Fluorescence Properties, Anti - Hiv Activity And Molecular Modeling Study of Some New Pregenolone Derivatives

Author name: رواء علاوي كاظم القريشي
Supervisor name: نجم عبود لعيبي المسعودي | نبيل عبد عبد الرضا
General topic: Chemistry
Specific topic: Chemistry
Degree: Doctorate
University: University of Al-Qadisiyah - College Of Science - Chemistry Department
Language: Arabic
Full text from the source: https://qu.edu.iq/repository/wp-content/uploads/2017/04/%D8%A7%D9%84%D8%AC%D8%B2%D8%A1-%D8%A7%D9%84%D8%A7%D9%88%D9%84-%D9%85%D9%86-%D8%A7%D9%84%D8%B1%D8%B3%D8%A7%D9%84%D8%A9.pdf
University location: Qadisiyah
First pages:
Abstract: نظرا لما تتمتع به مركبات الازو من تطبيقات مهمة في كل من المجالين الاكاديمي والتطبيقي فقد تمحورت دراستنا على تحضير ستة ليكاندات ازو جديدة مشتقة من المركب 5,4 - ثنائي فنيل اميدازول ودراسة السلوك التناسقي لكل منها مع ستة ايونات فلزية هي Co(II) , Ni(II) , C | Azo compounds have important applications in both of academic and applied fields, Accordingly, our study based on the synthesis of azo compounds derived from 4,5 - diphenyl imidazole and characterization of these azo compounds with their metal complexese containing Co(II) , Ni(II) , Cu(II) , Zn(II), Cd(II) and Hg(II) ions. Mass Spectra of ligands and their complexes were supported their molecular formula, while H1NMR spectra of ligands agreed well with the suggested structures , The C.H.N. and Atomic absorption analysis showed a good agreement with the calculated values , The purity of ligands and their complexes were examined by TLC and the values of Rf were values measured.Electronic spectra of complexes showed a bathochromic shift comparing to ligands spectra as a result of the coordination between the metal ions and ligands. The concentrations that obeyed Beer - Lambert Law of the complexes were determined from calibration curves , Mole Ratio Method indicate a ratio (1 : 2) (Metal : ligand) for the complexes of (DPEPI) and (DPDED) while other complexes with other ligands show a ratio (1 : 1) (Metal : ligand).Satiability Constants of the complexes were calculated and found that the Stability constants of complexes of the first ligand (DPEPI) were ( 2.955×10 12) >(2.294× 1011 ) <(1.121×10 12 ) < (1.108 ×1011 ) varied in the arrangement as Co(II)< Ni(II) < Cu(II)> Zn(II) which agree with Irving - Williams Series. This arrangement was applied on the complexes of the other ligands. The Conductivity measurements of complexes showed non ionic character. Apparently the magnetic susceptibility values agree with their values of the octahedral high spin complexes for Co(II)) while the complexes of Zn(II), Cd(II), and Hg(II) were diamagnetic. IR Spectra of complexes showed obvious changes of the frequencies of ? (N=N) of azo group and ?(C=N) of heterocyclic imidazole ring as result of coordination with metal ions, While the frequencies of ?(C=N) of azomethine group did not show any significant change for complexes comparing to the ligands spectra ,New bands were appeared in the region (400 - 500) cm - 1 in the spectra of complexes that due to frequencies of ?(M - N) because of coordination process. From the previous results the purposed structures of the complexes can be summarized as shown in the following : Proposal structure of (DPEPI) Complexes Proposal structure of (DIDHP), (DIDMP),

تحضير وتشخيص وتقييم انواع جديدة من البولي يورثان القابلة للتفكك الاحيائي ودراسة تطبيقاتها الحيوية في اطلاق الدواء == Preparation , Identification And Evaluation of New Types of Biodegradable Polyurethane And Study Their Application In Drug Delivery

Author name: صابرين فرحان جواد
Supervisor name: محمد علي مطر
General topic: Chemistry
Specific topic: Physical Chemistry
Degree: Master
University: University of Al-Qadisiyah - College Of Science - Chemistry Department
Language: English
University location: Qadisiyah
First pages:
Abstract: Corrosion and corrosion protection of carbon steel (C.S) alloy in seawater (3.5% NaCl) was achieved in this thesis. Three types of nanoparticles (NPs) were used to protect C.S the first silicon carbide (SiC), second alumina (Al2O3) and the third zirconium oxide (ZrO2) nanoparticles (NPs). Electrophoretic deposition (EPD) technique was applied to coating the C.S surface. Different polyacrylic acid (PAA) percentage (0.1 - 1)% were added to the suspension solution of coating by the three types of NPs, to improve the protection efficiency (PE%) for the coated C.S surfaces.The corrosion rate with respect to uncoated and coated C.S with the three above NPs were measured. Different corrosion parameters were obtained; corrosion current density (icorr), corrosion potential (Ecorr), cathodic and anodic Tafel slopes (bc,ba), protection efficiency (PE%), polarization resistance (Rp) and the surface porosity (P%). The effect of temperatures (298 - 328)K on the corrosion of uncoated and coated C.S by the three NPs in presence and absence of PAA were also investigated and therefore activation energy (Ea) and preexponential factor (A) were calculated. Thermodynamic parameters ?G, ?H and ?S for all corrosion processes were obtained. Coated C.S were analysed using atomic force microscopy (AFM) to detect the morphology of surface and the particles size of coat layers which range from 60 - 103 nm, which greater than thestarting particles.The corrosion current densities (icorr) were increased generally with increasing temperatures for all cases and icorr reduced after coated C.S by different NPs in absence and presence PAA, therefore icorr reduced from 168.88 ?A.cm - 2 to 19.45, 28.71 and 30.2 ?A.cm - 2 for C.S coated by SiC, ZrO2 and Al2O3 respectively at 298K.While the Ecorr shifted to more active potential after coated by different NPs excepting when C.S coated by SiC in presence of (0.25%) PAA in coating solution suspension where Ecorr shifted to noble direction. The protection efficiency (PE%) of all coated C.S in absence and presence of PAA showed noteworthy degree of enhancement and the PE% ranged between (85 to 99.65)% for SiC , (69 to 91)% for ZrO2 and (77 to 87.9)% for Al2O3. The surface porosity (P%) were increased with increasing temperatures for all cases. The activation energy (Ea) values for the corrosion of coated C.S by different NPs lead to higher values than Ea for uncoated C.S and the highest value was (71.936) kJ.mol - 1 obtained when C.S coated by SiC in presence of (0.25%) PAA. The free energy (?G) Values for the corrosion of coated C.S generally more negatively than uncoated and the values of enthalpy (?H) for the corrosion of coated C.S by ZrO2 and Al2O3 were less negatively than uncoated C.S while coated C.S by SiC lead to more negatively ?H values.
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