Histological and Biochemical Parameters Follow-up in Experimental rats Administrated dexamethasone and Treated with Green Synthesis Titanium Dioxide Nanoparticles Using (Camillia sciences) Extracts

في هذه الدراسة تم تحضير ثنائي اوكسيد التيتانيوم النانوي عن طريق تقنية سهلة وصديقة للبيئة هي طريقة التوليف الخضراء بأستخدام اوراق الشاي الاخضر, وتمت دراسة خصائص هذه المادة عن طريق الفحوصات التركيبة والبصرية, حيث اظهرت نتائج حيود الاشعة السينية ان النظام البلوري لثنائي اوكسيد التيتانيوم هو رباعي وله شبيكة مكعبية متمركزة الاوجه, اما تحليلات الاشعة الفوق البنفسجية- المرئية فقد اظهرت ان اعلى قمة للامتصاص كانت قرب 321 نانومتروقيمة فجوة الطاقة لها التي تم حسابها عن طريق قانون بلانك كانت 3.8 الكترون فولت, جميع القياسات اكدت الحجم النانوي ونقاوة المادة المحضرة. المعاملات الكيموحيوية اظهرت ان مادة ثنائي اوكسيد التيتانيوم النانوية ذات التركيز 50 ملغ\كغم كانت لها القابلية على تقليل مستوى السكر في الدم, التحسين من وظائف الكبد واسترجاع القيم الطبيعية للدهون في اجسام الحيونات المختبرية المحقونة بمادة الديكساميثازون, واخيرا اظهرت المقاطع النسيجية للبنكرياس ان هناك تغيرات حصلت بعد حقن الديكساميثازون ومن ثم المعالجة بالمادة النانوية. In this study, Titanium Dioxide Nanoparticles were synthesized by an easy and eco-friendly technique (green synthesis) using green tea leaves (Camillia sinensis), Nanoparticles were analyzed using structural and optical analysis, the X-ray pattern showed that Titanium Dioxide NPs had a tetragonal structure with (Face Centered Tetragonal) FCT crystal structure, the UV-visible recorded an absorbance peak near 350 nm and calculated energy band gap was 3.5 eV, all measurements were proved the purity and Nano size of prepared Nanoparticles. Biochemical parameters evaluation also mentioned in this research, these analyzes showed that Titanium Dioxide nanoparticles in particular dose (50 mg/kg) have the ability to reduce blood glucose levels, improve liver functions and recover lipid levels in the animals body, and lastly, histological pancreatic parts were submitted to observe changes that occurred after dexamethasone and nanoparticles were injected

A Study of the Teaching-Learning Challenges of the 21st Century at University ELT Classroom

With the increased anticipation of a university degree as a requirement for workforce entry, the criticism of business leaders, and the general public, it becomes critical for institutions of higher education to know what they are offering students, especially the English language and how well this subject is being presented. Therefore engaging and preparing students for life after school is a great challenge to teachers and institutions. Through the implementation of new tools and practice, this study was designed to explore the teaching-learning challenges of the 21st century at the university ELT classroom. The researcher administered a questionnaire to 171 students and 40 faculty members from three universities in Erbil, Kurdistan Region of Iraq. Statistical Package analyzed the data for Social Science, including Descriptive statistical analyses such as the mean and standard deviation, also Pearson Correlation and ANOVA test to compare the groups' responses. The results showed that learning a second/foreign language collaboration skills while in the classroom inside universities is one of the suitable ways for learning in current time. Also, students in universities have been able to assess their collaboration skills when working via group effectively and positively effect their learning of the English language. Finally, the students have tried to develop their skills by using technology as a tool for learning; this is showing as finding in this study that the availability of tools or technology devices positively and effective factor for students to learn second/foreign language and skills in their universities

Synthesis Characterization and Biological Activity Study of New Schiff and Mannich Bases and Some Metal Complexes Derived from Isatin and Dithiooxamide

Two new Schiff and Mannich bases, namely, 1-Morpholinomethyl-3(1′ -N-dithiooxamide)iminoisatin (LIH) and 1-diphenylaminomethyl-3-1′-N-dithiooxamide)iminoisatin (LIIH), were prepared from condensation reaction of new Schiff base 3-(1′-N-dithiooxamide)iminoisatin (SBH) with morpholine or diphenylamine respectively in presence of formaldehyde . The structures were characterized by IR, 1HNMR, mass spectrometry, and CHN analyses. Metal complexes of the two ligands were synthesized, and their structures were characterized by elemental analyses, atomic absorption, IR and UV-visible spectra, molar conductivity, and magnetic moment determination. All complexes showed octahedral geometries except palladium complexes which were square planar. The biological activity of the prepared compounds and some selected metal complexes was tested against three types of bacteria and against cell line of human epidermoid larynx carcinoma (Hep-2)

Preparing and Studying Structural and Optical Properties of Pb1-xCdxS Nanoparticles of Solar Cells Applications

تم تحضير الجسيمات النانوية لـ Pb1-xCdxS ضمن تركيبة x≤1≤0 من تفاعل المحلول المائي لأسيتات الكادميوم ، أسيتات الرصاص ، ثيوريا ، و NaOH بواسطة الترسيب الكيميائي المشترك. تميزت العينات التي تم تحضيرها بواسطة التحليل الطيفي للأشعة فوق البنفسجية (في نطاق 300-1100 نانومتر) لدراسة الخواص الضوئية و AFM و SEM للتحقق من و Pb0.75 Cd0.25 و Pb0.5Cd0.5S و Pb0.25Cd0 75S ، و CdS على التوالي ، ونقاء المرحلة. تشير النتائج إلى أن البنية البلورية لجميع العينات المحضرة هي مكعبة باستثناء CdS التي تظهر بنية سداسية شكل السطح (متوسط الخشونة والشكل) وحجم الجسيمات. تم استخدام تقنية XRD لتحديد البنية البلورية ، ومتوسط الحجم البلوري للجسيمات النانوية والتي هي 20.7 و 15.48 و 11.9 و 11.8 و 13.65 نانومتر لـ PbS ومكعبة ، وكان حجم الجسيمات (النطاق بين 64.81 إلى 91.14 نانومتر) في المدى النانوي ، ولها درجة نقاء عالية.Nanoparticles of Pb1-xCdxS within the composition of 0≤x≤1 were prepared from the reaction of aqueous solution of cadmium acetate, lead acetate, thiourea, and NaOH by chemical co-precipitation. The prepared samples were characterized by UV-Vis spectroscopy(in the range 300-1100nm) to study the optical properties, AFM and SEM to check the surface morphology(Roughness average and shape) and the particle size. XRD technique was used to determine the crystalline structure, XRD technique was used to determine the purity of the phase and the crystalline structure, The crystalline size average of the nanoparticles have been found to be 20.7, 15.48, 11.9, 11.8, and 13.65 nm for PbS, Pb0.75Cd0.25S, Pb0.5Cd0.5S, Pb0.25Cd0.75S, and CdS respectively. The results indicate that crystalline structure of all prepared samples is cubic except CdS which shows hexagonal and cubic structure. The particle size was found within the range of (64.81 to 91.14) nm, with a high purity

Orlicz Space of Difference Analytic Sequences

In this Paper, we introduce difference analytic sequence spaces defined by Orlicz function and study sometopological properties.Keywords: analytic sequence, Orlicz sequence space, difference sequence space

Optical Investigations of CdSe1-x Tex Thin Films

The alloys of CdSe1-xTex compound have been prepared from their elements successfully with high purity (99.9999%) which mixed stoichiometry ratio (x=0.0, 0.25, 0.5, 0.75 and 1.0) of (Cd, Se and Te) elements. Films of CdSe1-xTex alloys for different values of composition with thickness(0.5?m) have been prepared by thermal evaporation method at cleaned glass substrates which heated at (473K) under very low pressure (4×10-5mbar) at rate of deposition (3A?/s), after that thin films have been heat treated under low pressure (10-2mbar) at (523K) for two hours. The optical studies revealed that the absorption coefficient (?) is fairly high. It is found that the electronic transitions in the fundamental absorption edge tend to be allowed direct transition. It was also found that the optical energy gap vary non-linearly with composition (x) and have a minimum value at x=0.5 and increases after heat treatment. It is found that the optical constants vary non-linearly with composition, and the behavior inverse at x=0.5, and affected by heat treatment. The behavior of ?1 is similar to the behavior of n, while the behavior of ?2 is similar to the behavior of k

The Effect of annealing temperature on the optical properties of (Cu2S)100-x( SnS2 )x thin films

Thin films of (Cu2S)100-x( SnS2 )x at X=[ 30,40, &50)]% with thickness (0.9±0.03)µm , had been prepared by chemical spray pyrolysis method on glass substrates at 573 K. These films were then annealed under low pressure of(10-2) mbar ,373)423&473)K for one hour . This research includes , studying the the optical properties of (Cu2S)100-x-(SnS2)x at X=[ 30,40, &50)]% .Moreover studying the effect of annealing on their optical properties , in order to fabricate films with high stability and transmittance that can be used in solar cells. The transmittance and absorbance spectra had been recorded in the wavelength range (310 - 1100) nm in order to study the optical properties . It was found that these films had direct optical band gap which decreases with the increasing SnS2 ratio , while it increasing with the increase in the annealing temperature at all rati

Physical Properties of Cu Doped ZnO Nanocrystiline Thin Films

 تم تصنيع اغشية أكسيد الزنك البلورية النانوية المطعمة بالنحاس  (ZnO: Cu)بتراكيز مختلفة .. تم ترسيب (0 ، 6 ، 9 ، 12 ، 18) ٪ من النحاس على ركيزة زجاجية باستخدام تقنية ترسب الليزر النبضي (PLD) وبتراكيز مختلفة. وقد تم توصيف بلورات ZnO: Cu   النانوية بواسطة أطياف UV-VIS ، حيود الأشعة السينية (XRD) ومجهر القوة الذرية (AFM). تم استخدام التحليل الطيفي للأشعة المرئية وفوق البنفسجية لتحديد نوع وقيمة فجوة الطاقة الضوئية ، بينما تم استخدام حيود الأشعة السينية لفحص الهيكل وتحديد حجم البلورات. تم استخدام مجاهر القوة الذرية لدراسة تكوين سطح المواد المترسبة. تم استخدام التحليل الطيفي للأشعة المرئية وفوق البنفسجية لتحديد نوع وقيمة فجوة الطاقة الضوئية. Thin films of ZnO nano crystalline doped with different concentrations (0, 6, 9, 12, and 18 )wt. % of copper were deposited on a glass substrate via pulsed laser deposition method (PLD). The properties of ZnO: Cu thin-nanofilms have been studied by absorbing UV-VIS, X-ray diffraction (XRD) and atomic force microscopes (AFM). UV-VIS spectroscopy was used to determine the type and value of the optical energy gap, while X-ray diffraction was used to examine the structure and determine the size of the crystals.  Atomic force microscopes were used to study the surface formation of precipitated materials. The UV-VIS spectroscopy was used to determine the type and value of the optical energy gap

Effect the Temperature on Structure and Optical Properties for ZnS nanostructure Thin Film

ZnS nanocrystalline thin films by different temperature of reaction were prepared by chemical bath deposition using thiourea and zinc acetate as S2– and Zn2+ source. The optical absorption studies in the wavelength range 200–1100 nm show that band gap energy of samples 3.75 and 4.0 eV for different temperature reaction condition. The refractive index was estimated within the visible wavelength at 623 nm, it was 2.04 for sample 1 and its value will increase for sample 2 to be 2.55. The room temperature photoluminescence spectra of the films showed two peaks for all samples. We assigned the first peak due to band gap transitions while the latter was due to zinc vacancy in the films. Structural analysis using atomic force microscopy shows that the grain size for films were 73.2 and 87.34 nm. X-ray diffraction analysis indicates that both of them formed in the reaction bath have cubic zinc blende structure .The structural estimation shows variation in grain size 7nm and 20nm with different temperature reaction