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Article
Articular Cartilage Surface Topography and Roughness in Frozen Tissue Samples Using Optical Coherence Microscopy
طبوغرافيا وخشونة سطح غضروف مفصلي لعينات أنسجة مجمدة باستخدام طريقة التماسك البصري المجهري

Author: Sadiq Jafer Abbass صادق جعفر عباس
Journal: AL-NAHRAIN JOURNAL FOR ENGINEERING SCIENCES مجلة النهرين للعلوم الهندسية ISSN: 25219154 / eISSN 25219162 Year: 2016 Volume: 19 Issue: 1 Pages: 166-171
Publisher: Al-Nahrain University جامعة النهرين

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Abstract

This paper describes a method to visualize the topography of the surface of cartilage. Optical Coherence Microscopy (OCM) technique has been used to get two dimensional images of frozen tissue samples of bovine articular cartilage. Optical Coherence Microscopy (OCM) is a combination of optical coherence tomography and confocal microscopy. Coherence gate from OCT and confocal gate from confocal microscopy can achieve higher resolution and deeper penetration depth. The precise three-dimensional topography of the cartilage surfaces has been obtained. The full-image roughness, for frozen samples has been obtained.

يوضح هذا البحث استخدام طريقة لتصوير تضاريس سطح الغضروف. حيث استخدمت تقنية التماسك البصري المجهري (OCM) للحصول على صور ثنائية الأبعاد من عينات لأنسجة مجمدة من غضروف بقري مفصلي.ان التماسك البصري المجهري (OCM) هو مزيج من التصوير المقطعي للتماسك البصري والفحص المجهري متحد البؤر. بوابة التماسك من طريقة التماسك البصري المجهري وبوابة مبائر من الفحص المجهري متحد البؤر يمكن تحقيق دقة أعلى وعمق أكبر للاختراق. تم الحصول على تضاريس دقيقة ثلاثية الأبعاد لسطح الغضروف. تم الحصول على صورة كاملة لخشونة سطح العينات المجمدة


Article
The effect of disinfectant solutions on the surface topography of acrylic denture base materials

Authors: Munther N KAZANJI --- Nadia H AL-KAZZAZ
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2002 Volume: 2 Issue: 1 Pages: 65-71
Publisher: Mosul University جامعة الموصل

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Abstract

The aim of this study was to measure the effect of different immersion period up to (7) days of acrylic denture base materials (heat cure acrylic Vertex and QD, and cold cure acrylic Miky-red and QD) in three types of disinfectant solutions (0.525% Sodium hypochlorite, 0.2% Chlorhexidine and 2% acidic Glutaraldehyde) on the Surface roughness.One hundred eighty acrylic plates were prepared from a base plate wax of (20mm × 10mm×2.5 ± 0.03mm) dimension using a conventional denture processing technique. From each type of acrylic denture base materials, (45) acrylic plates were prepared, which where intern divided into three groups: (15) unpolished (inner-side) Surface, (15) polished by conventional technique and (15) polished by a modificated polished technique.The surface roughness was measured by a prethometer.The results, revealed that there was a significant difference at (1%) level between the materials used, solution used, types of polishing technique and the time of immersion. The cold cure acrylic denture base material type (Miky-fed) showed the highest degree of the surface roughness, Photomicrograph microscopical study of the acrylic beads (mer-unit) showed the effect of the size of the beads on the surface roughness.It was concluded that the modificated polishing technique produces a Smoother surface for the acrylic denture base materials, the solutions and duration of immersion up to seven days showed a statistical significant difference but practically they can be used for denture disinfecting.


Article
Structural Characteristics Study of Indium Diffusion in Silicon Using a Pulsed Nd:YAG Laser

Authors: W.K. Hamoudi --- R.O. Dala Ali
Journal: Iraqi Journal of Applied Physics المجلة العراقية للفيزياء التطبيقية ISSN: 18132065 23091673 Year: 2005 Volume: 1 Issue: 1 Pages: 34-38
Publisher: iraqi society for alternative and renewable energy sources and techniques الجمعية العراقية لمصادر وتقنيات الطاقة البديلة والمستجدة

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Abstract

In the current study, a pulsed Nd:YAG laser was employed to induce indium diffusion in silicon by laser irradiation of a thin indium film deposited on silicon. The work was aimed to study the structural characteristics changes of the irradiated region resulting from varying laser pulse energy within the range (0.25-0.53)J and varying silicon temperature from 300K to 373K during laser irradiation. Optical and scanning electron microscopes were used for the surface topography study of the samples. The study showed formation of linear cracks, protrusions and craters depending on the laser energy used. The indium diffusion depth within the silicon was determined using an energy dispersive spectra (EDS). This was done when illuminating at the laser melting threshold at substrate temperature of 373K and when illuminating at higher laser energy and substrate at room temperature (300K). the diffusion depth increased and the impurity concentration at the surface decreased as laser energy got higher. Higher substrate temperature helped increasing the impurity concentration at the surface.


Article
Effect of salvadora Persica Extracts on Titanium Alloy Surface Topography

Author: Nadira A. Hatim
Journal: Journal of Oral and Dental Research مجلة طب الفم والاسنان ISSN: 23106417 Year: 2013 Volume: 1 Issue: 1 Pages: 26-38
Publisher: Iraqi Association for Oral Research الجمعية العراقية لبحوث طب الفم

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Abstract

Introduction:Fluoride containing mouth rinses, and toothpastes have been reported to decreasethe corrosion resistance of titanium.Salvadora persica has been recently introduced in twoforms: tooth paste (Saudi Arabia) and mouth wash. The influence of these products on TitaniumAlloy Surface Topography has not been tested before. Aim of the study: To compare betweenthe effects of Salvadora persica(Siwak® toothpaste and its alcoholic extract), with fluoridecontaining tooth paste (kin® toothpaste) and kin® mouth wash on the corrosion of pure titaniumgrade 2 (cpTi). Materials and methods: Alcoholic extract of Salvadora persicawas prepared,and tested on sixty weighted samples of cpTi divided into 4 experimental groups. Samples in thecontrol group were immersed in distilled water. In the first experimental group, samples weretreated with Kin® tooth paste. For the 2nd experimental group, samples treated with Kin® mouthwash. Samples in the 3rd experimental group were treated with Siwak® toothpaste. The finalexperimental group was treated with extract of Salvadora persica. These samples were subjectedto surface topography (AFM) and transverse strength tests before, after three, and six months oftreatments. Results: Weighting test showed no significant difference (p≤0.05) between the meanvalues of four treated groups of cpTi samples before, and after 3 months. However, there was asignificant difference (p<0.05)between cpTi before and after 6 months treatment with Siwak®tooth paste. Surface topography showed a statistically significant difference between root meansquare roughnesses of cpTi samples after 3, and 6 months of treatment. Transverse strength alsoshowed a statistically significant difference between the mean value of cpTi between the treatedand control groups after three months and six months.Conclusions:Siwak® toothpaste seems to have more effect on both weight and roughness of cpTicompared to alcohol extract of Salvadora persicaand Kin® toothpaste.


Article
Structure, surface topography and optical characterization of Ag co – doped Cd1-xCuxO nanostructure thin films
نانوية التركيب Cd1-xCuxOتوصيف الخصائص التركيبية وطبوغرافية السطح والبصرية لأغشية ثنائية التطعيم بالفضة

Author: Adel H. Omran Alkhayatt عادل حبيب عمران الخياط
Journal: Journal of Kufa - physics مجلة الكوفة للفيزياء ISSN: 20775830 Year: 2017 Volume: 9 Issue: 2 Pages: 41-55
Publisher: University of Kufa جامعة الكوفة

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Abstract

Cd1-xCuxO and Ag co-doped Cd1-xCuxO nanostructure thin films with x = 0.2 and different Ag content (0-8%) were deposited by chemical spray pyrolysis technique on glass substrates at a temperature of 350 oC. The XRD results showed that the prepared films have polycrystalline with low crystallinity nature for CdO cubic structure. The preferential orientation of all films was absorbed along (111) plane. CuO monoclinic phase has appeared with low intensity while the Ag cubic phase appeared only in 8% of Ag content. Structural parameters such as average crystallite size, dislocation density and micro-strain were also investigated. SEM images revealed that the surface morphology of the films consists of spherical shaped grains uniformly distributed without detectable micro-cracks and improved by Ag Co-doping. EDXS spectrum analysis confirmed purity and stoichiometry of the prepared compositions. AFM results showed that the surface topography and the surface quality of the deposited thin films can be controlled by the variation of the Ag co-doping concentration. Optical absorbance and transmittance of Ag co-doped Cd1-xCuxO thin films has high values in the visible and near infrared regions respectively and varied with Ag co-doping content. Direct optical energy band gap of Cd1-xCuxO exhibits a blue shift with Ag co-doping, due to the quantum size and Burstein–Moss (BM) effects. The increasing of optical energy gap was confirmed by the decrease in the Urbach tails energy EU after Ag co-doping..

أغشية Cd1-xCuxOو أغشية Cd1-xCuxOنانوية التركيب الرقيقة ثنائية التطعيم بالفضة رسبت بواسطة تقنية الانحلال الحراري الكيميائي على قواعد زجاجية عند درجة حرارة 350 درجة مئوية. وأظهرت نتائج حيود الأشعة السينية أن الأغشية المحضرةذات تركيب متعدد التبلور وبطبيعة تبلور منخفضة. الاتجاه التفضيلي للتبلور لجميع الأفلام على طول المستوي (111). وقد ظهرطور أحادي الميل لأوكسيد النحاس وبشدة حيود منخفضة في حين أن طورالفضةالمكعب ظهر فقط عند 8٪ فضة من المحتوى. كما تم أيضا دراسة المعاملات التركيبية مثل متوسط حجم البلورات، وكثافة الأنحلاعاتوالمطاوعة المايكروية. كشفت صور المجهر الألكتروني الماسح أن مورفولوجيا سطح الأغشية تتكون من حبوب كرويةالشكل موزعة بشكل متجانسمع عدموجود الشقوق الصغيرة وتحسينها بالتشويب الثنائي بالفضة. أكد تحليل الطيف EDXS نقاوة والنسب الكيميائية المتكافئة للمركبات المحضرة. وأظهرت نتائج مجهر القوة الذرية أن تضاريس وجودة السطح للأغشية الرقيقة المحضرة يمكن السيطرة عليها من خلالتغيير تركيز شائبة الفضة الثنائية. الامتصاصية والنفاذية البصريةلأغشية Cd1-xCuxOثنائية التطعيم بالفضة لها قيم عالية في المنطقة المرئية والمنطقة تحت الحمراء القريبة على التوالي وتتغير مع تغير محتوى التطعيم الثنائي بالفضة. فجوة الطاقة البصرية المباشرة لأغشية Cd1-xCuxOتظهر ازاحة زرقاء بالتشويب الثنائي بالفضة، وذلك بسبب الحجم الكمي و تأثير B-M. وقد تأكدت زيادة فجوة الطاقة البصرية من خلال الانخفاض في طاقة ذيول أورباخ بعد التشويب الثنائي بالفضة.


Article
Nano Ni Thin Films Microstructure Evolution and Their Electrical Resistance
تقييم تراكيب اغشية النيكل الرقيقة النانوية ومقاومتها الكهربائية

Authors: Shrok Abdullah Edaan Allami شروق عبد الله عيدان اللامي --- Mohammed Shaalan Aesa محمد شعلان عيسى
Journal: Iraqi Journal of Science and Technology المجلة العراقية للعلوم والتكنولوجيا ISSN: 18136893 Year: 2015 Volume: 6 Issue: 1 Pages: 88-97
Publisher: Ministry of science and technology وزارة العلوم والتكنولوجيا

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Abstract

Nano Ni thin films were prepared by thermal evaporation technique, their nanoparticles size controlled via process parameters. Ni thin films were deposited on Si wafers and soft glass sheets. The effects of substrate material and their temperatures during deposition on nanoparticles size and thin films microstructure were studied through AFM surface morphological observations and XRD results respectively. It was found that nanoparticles size increased from 7 to 25 nm with increasing Si substrate temperature during deposition, these affects thin films electrical resistance. It was also found that electrical resistivity decreased with increasing nanoparticles size for Ni thin films deposited on Si wafer, while increased with substrate increasing temperature during deposition.

حضرت اغشية النيكل النانوية بتقنية التبخير الحراري, والتي تم التحكم بحجوم جسيماتها النانوية من خلال متغيرات عملية التحضير. رسبت اغشية النيكل الرقيقة على شرائح السليكون وعلى قواعد زجاجية. درس تأثير مادة القاعدة المرسب عليها ودرجة حرارتها اثناء الترسيب على حجوم الحبيبات وتركيبها الميكروي من خلال فحوصات طوبوغرافية السطح باستخدام مجهر القوة الذرية وحيود الاشعة السينية. لقد وجد ان حجوم الجسيمات النانوية تزاد من 7-25 نانومتر مع زيادة درجة حرارة قواعد السليكون اثناء الترسيب . تؤثر هذه الزيادة على الخواص الكهربائية لأغشية النيكل الرقيقة والتي درست باستخدام تقنية الاقطاب الاربعة التقليدية. ولقد وجد ايضا ان المقاومية الكهربائية تقل مع زيادة حجوم حبيبات النيكل النانوية المترسبة على قواعد السليكون , الا انها تزداد مع زيادة درجة حرارة القواعد اثناء الترسيب

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