دراسة بعض المتغيرات الكيموحيوية والمناعية في النساء المجهضات خلال الثلث الاول من الحمل == Study of Some Biochemical And Immunological Parameters In Abortifacient Women During First Trimester of Pregnancy
Author name:
انتصار فاضل مصطفى
Supervisor name:
صباح حسين خورشيد | نزار احمد ناجي
General topic:
Chemistry
Specific topic:
Chemistry
Degree:
Master
University:
Tikrit University - College Of Science - Chemistry Department
Language:
Arabic
University location:
Salahaddin
First pages:
25T1496 - p.pdf
Abstract:
تضمنت الرسالة تحضير العامل المساعد اوكسيد الزنك بطريقة الترسيب وقد تم تشخيصه بوساطة تقنية حيود الاشعة السينية XRD)) والاشعة تحت الحمراء (FTIR) والاشعة فوق البنفسجية - المرئية (..(UV - Vis تم دراسة تاثير درجة حرارة التلدين على الفعالية الضوئية لاوكسيد الزن | This work included preparation of zinc oxide by precipitation method. characterization of sample prepared work by using X - Ray Diffraction (XRD) and infrared spectra (FTIR) and Ultraviolet - visible spectra (UV - Vis). The effect of calcination temperature was studied on the photo activity of zinc oxide and physical properties such as surface area and porosity and density. The results showed that annealing temperature 773K was the best for the preparation of zinc oxide , which gave a good physical properties. The adsorption of Alizarin gelb dye (A.G) on the surface of zinc oxide was studied and it was found that the equilibrium time required was 30 min.. The kinetics of photo reaction of dye was studied in the presence of catalyst and oxygen through the irradiation of the dye solution by medium pressure mercury lamp at a temperature of 298 K and it was found that the order of reaction was first order. The optimum conditions for photooxidation of the dye was determined by studying several factors such us : dye concentration at the range (30 - 70) mg/L and it was found the optimum concentration was 40 mg/L , weight of zinc oxide at the range (0.05 - 0.9) g and it was found that the optimum weight was 0.3 g , pH of the medium at the range (3 - 11) and it was found that the optimum pH was 8 , different oxidants (potassium dichromate, potassium persulfate and hydrogen peroxide) and it was found that the highest percentage of dye decolorization was by using of hydrogen peroxide, The effect of doping transition metal ions (Co2+,Ni2+,Cu+2) it was found that undoping zinc oxide possessed higher activity from doped oxide , Effect presence of support materials such as (alumina, silica, bentonite, activated charcoal) on the dye decolorization and it was found that the higher percentage was by using activated charcoal.
