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Open Journal of Geology 2021年第11期11卷 596-620页

作者： Aref Shirazi adel Shirazy hamed Nazerian Shayan Khakmardan Amirkabir University of Technology Tehran Iran University of Catania Catania Italy

Sheytoor Iron Ore deposit is located in Yazd province of Iran (Bafq). The most abundant ore is magnetite, which can be seen in the form of mass and granular tissue in various forms of self-shaped, semi-self-shaped and amorphous. The main purpose of this study is to identify the geochemical relationship of phosphorus and sulfur elements and also three-dimensional modeling of mineralization of these elements in iron ore. In order to achieve the research goal, methods such as k-mean clustering technique, concentration-volume fractal as well as block modeling with kriging estimator and Inverse Distance Weighting (IDW) interpolator were used. The model of geochemical behavior of phosphorus and sulfur elements compared to iron is of great importance because these two elements are known as deleterious elements in mineral processing and steelmaking processes, which are the post-mining stages. Existence of geochemical model and identification of elements’ behavior towards each other play a key role in optimizing mining operations in order to achieve geometallurgical goals. The results of this study are the three-dimensional model of mineralization of iron, phosphorus and sulfur elements, separation of phosphorus and sulfur mineralization communities and also presenting the model of enrichment community of these two elements. All the results are in line with geometallurgical studies and can optimize the next steps by optimizing the mining process.

关键词： Geometallurgy Geochemical Behavior Phosphorus Sulfur Iron Ore K-Means Geochemical Modeling

Reactivity of 6-anisyl-5-cyano-4-oxo-2-thioxo-1,2,3,4-tetrahydro-pyrimidine towards some electrophiles and nucleophiles

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Chinese Journal of Chemistry 1991年第3期9卷 262-269页

作者： HASSAN M.F.Madkour MAhamed A.E.Sayed ASHRAF A.hamed adel M.Gaber ABD EL-KHALIK A.Hataba Faculty of Science Ain Shams UniversityDepartment of ChemistryAbbassiaCairoEgypt Faculty of Engineering Ain Shams UniversityDepartment of ChemistryAbbassiaCairoEgypt

The title compound was subjected to react with some electrophiles and nucleophiles, such as alkyl halides,ethyl chloroacetate or amines,hydrazines *** resulting compounds were used in further syntheses for the purpose... 详细信息

关键词： Reactivity of 6-anisyl-5-cyano-4-oxo-2-thioxo-1,2,3,4-tetrahydro-pyrimidine towards some electrophiles and nucleophiles KBr

Modelisation and Optimization of a Microbial Desalination Cell System

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Journal of Sustainable Bioenergy Systems 2021年第3期11卷 118-130页

作者： Hedia Khaled adel Zrelli Mouna hamed Béchir Chaouachi Laboratory of Energy Water Environment and Processes National Engineering School of Gabes Gabes Tunisia

In this work, we used a hybrid system composed of a Microbial Desalination Cell (MDC). This system allows, at the same time, the treatment of wastewater and the production of electrical energy for the desalination of saltwater. MDC is a cleaning technology used to purify wastewater. This process has been driven by converting organic compounds contained in wastewater into electrical energy through biological, chemical, and electrochemical processes. The produced electrical energy was used to desalinate the saline water. The objective of this work is the desalination or pre-desalination of seawater. For this, we have established a theoretical model consisting of differential equations describing the behavior of this system. Subsequently, we developed a program on MAT-LAB software to simulate and optimized the operation of this system and to promote the production of electrical energy in order to improve the desalination efficiency of the MDC. The theoretical result shows that the electrical current production is maximal when the methanogenic growth rate equal to zero, increases with the increasing of influent substrate concentration and the efficiency of desalination increased with flow rate of saline water.

关键词： Microbial Desalination Cell Desalination Wastewater Electrical Current Production

Geophysical Study: Estimation of Deposit Depth Using Gravimetric Data and Euler Method (Jalalabad Iron Mine, Kerman Province of IRAN)

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Open Journal of Geology 2021年第8期11卷 340-355页

作者： adel Shirazy Aref Shirazi hamed Nazerian Keyvan Khayer Ardeshir Hezarkhani Department of Mining Engineering Amirkabir University of Technology (Tehran Polytechnic) Tehran Iran Department of Civil Engineering and Architecture University of Catania Catania Italy Faculty of Mining Petroleum & Geophysics Engineering Shahrood University of Technology Shahrood Iran Amirkabir University of Technology Tehran Iran

Mineral exploration is done by different methods. Geophysical and geochemical studies are two powerful tools in this field. In integrated studies, the results of each study are used to determine the location of the drilling boreholes. The purpose of this study is to use field geophysics to calculate the depth of mineral reserve. The study area is located 38 km from Zarand city called Jalalabad iron mine. In this study, gravimetric data were measured and mineral depth was calculated using the Euler method. 1314 readings have been performed in this area. The rocks of the region include volcanic and sedimentary. The source of the mineralization in the area is hydrothermal processes. After gravity measuring in the region, the data were corrected, then various methods such as anomalous map remaining in levels one and two, upward expansion, first and second-degree vertical derivatives, analytical method, and analytical signal were drawn, and finally, the depth of the deposit was estimated by Euler method. As a result, the depth of the mineral deposit was calculated to be between 20 and 30 meters on average.

关键词： Geophysical Study Depth Estimation Gravimetric Data Euler Method Jalalabad Iron Mine

The Influence of Polyurethane Foam on the Insulation Characteristics of Mortar Pastes

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Journal of Minerals and Materials Characterization and Engineering 2017年第2期5卷 49-61页

作者： Ahmed adel Mahmoud Elsayed Abdel Ader Nasr Ahmed Abdel hamed Maamoun Department of Physics and Mathematics Faculty of Engineering Ain Shams University Cairo Egypt Department of Structural Engineering Ain Shams University Cairo Egypt

Rigid polyurethane foam is found virtually everywhere in our modern world and is used in sound and thermal insulation applications such as refrigerators, insulated buildings, thermosets. Organometallic compounds are used as polyurethane catalysts since they are very highly selective towards the isocyanate-polyol reaction. Also, amine catalysts are used to balance both the gelling reaction and the gas-forming or foaming reaction responsible for foam formation. In this work, the effect of a tin octoate catalyst on the mechanical properties and morphology of polyurethane foam were investigated. Also, the thermal conductivity and sound absorption coefficient for polyurethane foam mortar formulations were measured. The morphological properties of polyurethane foam were investigated using scanning electron microscope to determine the influence of varying the concentration of tin octoate. It was clear from the results that polyurethane foam has good thermal and sound insulation capabilities.

关键词： Polyurethane Foam Organometallic Catalyst Compressive Strength Thermal Conductivity Sound Absorption Coefficient

姜黄根提取物对甲氨蝶吟诱导的肠损伤及氧化应激的保护作用(英文)

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中国天然药物 2013年第5期11卷 477-483页

作者： adel Rezaei Moghadam Daryoush Mohajeri Ali Namvaran-Abbas-Abad hamed Manafi Delavar Shahi Mohammad Mazani Young Researchers Club Ardabil BranchIslamic Azad University Faculty of Veterinary Medicine Tabriz BranchIslamic Azad University Department of Pathobiology Faculty of Veterinary MedicineTabriz BranchIslamic Azad University Young Researchers and Elite Club Tabriz BranchIslamic Azad University Department of Biochemistry Ardabil University of Medical Science

AIM:The most important side effect of methotrexate(MTX)is *** purpose of this study was to evaluate the effect of turmeric extract on intestinal damage and oxidative stress in rats receiving ***:Experiments were performed on male Wistar albino rats divided into six *** group received normal saline orally,the second group received turmeric extract(100 mg·kg-1)orally for 30 days,the third group received turmeric extract(200 mg·kg)orally for 30 days,the fourth group received a single dose of methotrexate(20 mg·kg)*** day 30,the fifth group received turmeric extract(100 mg·kg)orally for 30 days and a single dose of methotrexate(20 mg·kg)*** day 30,and the sixth group received turmeric extract(200 mg·kg)orally for 30days and single dose of methotrexate(20 mg·kg)*** day *** days after methotrexate injection,animals were anesthetized,blood samples were taken to determine total antioxidant status(TAS)and jejunum samples were taken for glutathione peroxidase(GPx),superoxidase dismutase(SOD),catalase(CAT),aldehyde malondialdehyde(MDA),and histopathological ***: Microscopic evaluation from intestinal tissues of the MTX treated group,showed severe villus shortening and blunting,inflammatory cell infiltration and hemorrhage in lamina propria,along with epithlial cell *** of SOD,GSH-Px and CAT decreased in the MTX received group,but increased significantly(P<0.05)in the turmeric+MTX *** increased lipid peroxidation,however,turmeric decreased peroxidation significantly(P<0.05).CONCLUSION:These results suggest that turmeric extract may protect the small intestine of rats from methotrexate-induced *** effects could result from its antioxidant properties.

关键词： Turmeric Methotrexate Intestinal damage Oxidative stress

Chemical Variation of Chromian Spinel Compositions in a Serpentinized Peridotites: Implications for Evolution of the Neoproterozoic Ophiolites

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Acta Geologica Sinica(English Edition) 2016年第S1期90卷 210-页

作者： hamed Gamal EL DIEN Tomoaki MORISHITA Mohamed HAMDY Abdel Salam ABU EL-ELA adel HASSAN Yusuke SODA Department of earth science school of Natural System Kanazawa University Geology Department Faculty of Science Tanta University

Tectonic setting of the Neoproterozoic ophiolites is poorly *** of extensive serpentinization/metamorphism in the mantle section,accessory chromian spinel has been used as an important geotectonic indicator.

关键词： Chemical Variation of Chromian Spinel Compositions in a Serpentinized Peridotites Implications for Evolution of the Neoproterozoic Ophiolites

Frozen Section in Postmenopausal Women Presented with Suspicious Ovarian Masses, Does It Have a Role?

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Journal of Cancer Therapy 2015年第14期6卷 1192-1195页

作者： Basel Refky Anas Gamal Emad hamed adel Fathi Mohammad Arafa Sameh Roshdy Khaled Gaballa Essam Attia Mohamed Abdelkhalek Mohamed T. Hafez Fayz Shahatto Shadi Awny Doaa Shokry Gehad Tawfik Surgical Oncology Unit Oncology Center Mansoura University Mansoura Egypt Gynecology Department Mansoura University Hospitals Mansoura Egypt Pathology Department Mansoura University Mansoura Egypt Public Health Department Mansoura Faculty of Medicine Mansoura Egypt Medical Intern Mansoura University Hospitals Mansoura Egypt

Background: Frozen section (FS) has a valuable role in the diagnosis of ovarian tumors. It is considered a pivotal point in guiding the surgical therapy, particularly in premenopausal women. In postmenopausal women, it may be required as well to avoid unnecessary surgical staging in benign ovarian tumors. Aim: This study aims to evaluate the accuracy of intraoperative frozen section in ovarian neoplasms in postmenopausal women. Materials and Methods: A retrospective analysis was done for intraoperative FS for suspected ovarian neoplasms. The study was conducted in Oncology Center, Mansoura University from March 2008 to December 2014. The frozen and paraffin section reports were compared, and overall accuracy, sensitivity, specificity, positive and negative predictive values were determined. Results: The study included 105 patients and the overall accuracy of FS in determining malignancy was 81.7%. The sensitivity for malignant tumors was 75.32% with specificity of 100%. For benign tumors, the sensitivity and specificity were 100% and 93%, respectively. Borderline tumors had the lowest sensitivity of 100% with specificity of 95.19%. Conclusion: The present study concurs that frozen section is an accurate test for diagnosis of benign and malignant tumors in postmenopausal women thus determining the extent of surgery done for them. On the other hand, accuracy rates for borderline tumors are low.

关键词： Frozen Section Ovarian Cancer Surgical Staging

The Effectiveness of Intraoperative Frozen Section Analysis of Safety Margins in Breast Conserving Surgery and the Role of Surgeon in Decreasing the Rate of Positive Margins

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Surgical Science 2017年第12期8卷 499-509页

作者： Omar Farouk Ahmed Senbel Mosab Shetiwy Essam Attia Ahmed Abdallah Osama El-Damshety Ashraf Khater Sameh Roshdy Amr Abouzid Amr Hossam Islam H. Metwally Omar Hamdy Amir M. Zaid Mahmoud Abdelaziz Mohamed Elmetwally adel Fathi Emad-Eldeen hamed Khaled Abdel Wahab Wagdi El-Kashef Mohamed Hafez Khaled Zalata Mohamed Hegazy adel Denewer Surgical Oncology Department Oncology Center Faculty of Medicine Mansoura University Mansoura Egypt Pathology Department Faculty of Medicine Mansoura University Mansoura Egypt

Introduction: Nowadays the more accepted surgical option for treating early breast cancer is breast conserving surgery. The main challenge in this type of surgery is to get free safety margins without need of second surgical operation, so many breast surgeons have started to depend on intraoperative frozen sections to ensure free safety margins. Aim of work: To assess our policy that we prefer to depend on intraoperative frozen section analysis to get free safety margin in breast conserving surgery from the 1st surgery, and its oncologic outcome. Patients and Methods: This is a retrospective study conducted in Oncology Center—Mansoura University (OCMU), where the data of 219 patients with breast cancer, who were managed by breast conserving surgery with intraoperative frozen section analysis of the safety margins, was analyzed. Results: The intraoperative frozen section analysis of safety margin was negative from the start in 183 (83.6%) patients, while it was positive in 36 patients (16.4%). Intraoperative decision of margin re-excision was applied for 29 patients (13.2%) in order to reach negative margin, modified radical mastectomy was offered for 4 patients (1.8%), while nipple sparing mastectomy with immediate breast reconstruction using latissimus dorsi flap was offered for 3 patients (1.4%). The postoperative paraffin results were typical with intraoperative frozen section analysis results in 216 patients (98.6%) and different results were obtained in only 3 patients (1.4%) who were managed by modified radical mastectomy in a second operation. Only 4 patients had local recurrence (1.8%) during the period of follow-up duration which was ranged from 1 to 86 months with mean ± SD (22.3 ± 14.1). Conclusion: The intraoperative frozen section analysis of safety margins in breast conserving surgery has very high-rate typical results with the paraffin section analysis and it is very helpful in decreasing the rate of second surgical operation in cases of infiltrated m

关键词： Breast Conserving Surgery Intraoperative Frozen Section Analysis Safety Margins Breast