علوم - ماجستير
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Item The Effect of Annealing and concentration on the Optical PropertiesofZnOthinfilms.(2014) Abubaker Abdelrahim AliAbstract In this study were prepared different samples concentration of zinc oxide using Sol-Gel method, and through the spin coating process have been fabricated thin films from zinc oxide and have treatment that thin films thermally at different temperatures, by using XRD have been calculated particle size of ZnO found to be (86.6nm) then by using UV characterization have been seen the effect of temperature and concentration on optical properties of ZnO thin films, we have been observed the absorption decreasing with increasing of concentration, and increasing with increasing in temperature, we have been calculated the energy gap of the zinc oxide is 3.3 eV, We have been observed the energy band gap of ZnO change by the change in temperature and concentration.Item Effects of the Magnesium on the structure and Optical Properties of the Cobalt ferrite nanoparticles(AL-Neelain University, 2017-04) Ahmed Hassan Hamid AhmedABSTRACT In this research magnesium (Mg) substituted cobalt nanocrystalline spinel ferrite having general formula CoMgxFe2-xO4 (with x = 0.0, 0.2, 0.4, 0.6, 0.8) were prepared successfully using Co-precipitation method. The obtained material was annealed at 600c0 and characterized using X-ray diffractions, FTIR and UV-visible spectroscopy.XRD analysis confirmed the formation aboud single phase spinel structure. The crystalline size for pure sample was calculated using Debye-Scherer's equation, and was found to be 64nm. The IR- spectra for the samples measured in the range of 400-4000cm-1 inhibited symmetric starching mode of vibration of tetrahedral and octahedral sites, and showed the characteristics absorption bands around 590, 1111, 1407, 1643, 2327 and 3400. UV-Visible spectrum appeared optical absorption of the obtained materials and found to be at the range of the visible light spectrum. المستخلص في هذا البحث تم دراسة ثأثير الماغنيزوم على مركب النانوكوبالت الفرايتي (الحديدي) ذات الصيغة الكيميائية CoMgxFe2-xO4 (x = 0.0, 0,2 0.4, 0.6 , 0.8) و المحضرة بطريقة الترسيب الكيميائي المشترك، وتم معالجة المواد المحضرة حراريا في درجة الحرارة 600درجة مئوية .كما تم استخدام جهاز مطيافية حيود الاشعة السينية ومطيافية الاشعة تحت الحمراء وكذلك مطيافية الاشعة فوق البنفسجية لدراسة بعض الخصائص التركيبية والضوئية للعينات المحضرة. اشارت نتائج حيود الاشعة السينية ان المركب الاساسي الناتج لديها تركيب بلوري مكعب احادي الطور . واستخدم معادلة ديباي- شيرر في حساب حجم الخلية لذات العينة ووجد انه تساوي 64نانو متر. وقد أظهرت قياسات جهاز مطيافية الاشعة تحت الحمراء في المدى من 400 الي 4000سم-1 ان المادة لديها امتصاصات في المدى. 3400, 2327, 1643, 1407, 1111, 590 ووجد ان المادة من النوع اسبينل فرايت. اظهرت جهاز مطيافية الاشعة فوق البنفسجية نتائج ان العينات تمتص في مدى طيف المرئي .Item determination of elemental and toxiee elemental of lipstieks by loser induced break down spectroscap(libs)(Al Neelain University, 2015) tasnim awad ehkreemLaser-induced Breakdown Spectroscopy (LIBS) is a relatively new analytical diagnostic technique which has gained serious attention in recent past due to its simplicity, robustness, portability to multi-element analysis capabilities with no sample preparation. LIBS have been used successfully for analysis of elements in different media including solids, liquids, slurries and gases. Majority of fundamental understanding of the processes that occur has taken place in last decade, which has propelled LIBS in the direction of being a well established analytical technique. This study, which mostly focuses on LIBS applications, has been analysis for Lipstick, to determined toxic and contaminants elements like Lead, Chromium, Cadmium, strontium and Cobalt. The laser pulse on the sample under investigation excites it and plasma formed. The emitted spectra is collected and analyzed to determine the trace and major elements exist in the sample. Expect (Os,Rh, Hf, Sm, Xe, Pt, In , K, Yb ,Pu ,Pa ,Eu, etc) these are not toxics put can cause problems when found like (Pb , Cu , Zn , Ti , Cd , Cr ) المستخلص إن إستخدام طريةقة النببعاث المسستحث بواسسطة الليسزر المعروفسة إختصسارا باسسم LIBS فسي التحليسل الطيفي تعتبر من الطرق الجديةدة الستي حصسلت علسى إهتمسام زائسد مسؤخرا بسسبب بسساطتها و قسدرتها و قابلية نبقلها بالضاافة لجرراء التحليل لكثر من عنصر في نبفس الوقت وكل ذلك بدون العسداد المسسبق للعينات . وقد استخدمت هذه الطريةقة بنجساح فسي التحليسل لعينسات فسي حسالت مختلفسة للمسادة مسن صسلبة وسائلة و غازيةة و حستى شسبه صسلبة. أغلسب التغيسرات الستي تصساحب هسذه الطريةقسة عرفست فسي العقسود الخيرة وقد دفعت بهذه الطريةقة لتكون طريةقة جرديةدة معتمدة. وفي هذا البحث اسستخدمت هسذه الطريةقسة للتحليل احمر الشفاه الكثر اسستخداما وذلسك للبحسث عسن وجرسود الملوثسات مثسل الرصساص و الكسروم و الكادميوم والسترانبشيوم و الكوبالت حيث تعمل أشعة الليزر على إثسارة العينسة و تتكسون البلزمسا وتسم جرمع الطيف المنبعث من العينة و تم تحليله و حددت جرميع العناصر الموجرودة في العينة وادرجرت هسذه النتائج .ومن العناصر ) Os,Rh, Hf, Sm, Xe, Pt, In , K, Yb ,Pu ,Pa ,Eu, etc ( وهسي عناصر امنه وتم الحصول علي بعض الملوثات مثل ) Pb , Cu , Zn , Ti , Cd , CrItem Characterization and Optical physical properties of pumpkin roots(Al Neelain University, 2015) Shougi Abdelraheam Ibrahim AlhajIn this study the roots of honey pumpkin and bitter melon had been taken to study some Physical properties, such as optical properties. By means Fourier trans form infra red spectr ometer ( FT - IR ) ,and physical Characterization and concentration of the element of the roots by X - ray Fluorescence spectrometer ( XRF ) . The result had been found was that, the transmittance corresponds to ( Alkenes – C=C - ) and ( Amines N - H ) bonds. A nd the most concentrated element i s pota ssium in honey pumpkin is greater than in bitter melonItem Characterization and optical properties of pumpkin leaves(Al Neelain University, 2015) Haytham Osman Ahmed MahjoubIn this study the leaves has been taken for honey pumpkin and bitter melon in order to study some physical properties such as optical properties and physical characterization by using Fourier Transform Infra red FT-IR Spectrometer. And the X-Ray Fluorescence XRF Spectrometer . To find the concentration of elements ( (potassium (K), calcium (Ca), chromium (Cr) ,Magnesium(Mn),Iron(Fe),Nickel(Ni), copper(cu), Zinc (Zn),Lead (pb) ,Bromine (Br) , Rubidium (Rb), Strontium (Sr)) was found the bonds ( Alkenes ) - C = C - , It was found that concentration Calcium in honey pumpkin is grater than in bitter melonItem LASER INDUSED BIOSTIMULATION OF HUMAN BLOOD CELLS USING He-Ne LASER(Al Neelain University, 2016) AlaaAbdulgadirAlabaidAbstract: Bio-stimulation effects of low level lasers (LLL) on biological properties of human blood were studied in this work. 21 blood samples that were taken from adult volunteers 20 to 30 years old were taken randomly and were then exposed to He-Ne laser (λ= 632.8nm) with various power range during the work (different doses). Specifically 1mw, 3mw, and 6mw laser power were used. Automated hematology analyzer was used to measure the blood parameters such RBC, WBC, HCT, PLT and HGB. These results were compared with the results that obtained from non- irradiated samples (control samples) in order to determine the effects of low level lasers on human blood. The results showed that LLL has affected the blood and increased some parameters of the human blood. It was found significant change in the blood parameters was dateable with 6mw power. In conclusion use of He-Ne laser with 6mw power for enhancement of blood parameters is possible