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Characterization of Upper Air Way Tract in Snoring and Non-Snoring Patients: A CT Based Study

Open Journal of Radiology 2016年第3期6卷 181-190页

作者： fathia abd el rahman mohamed alamin Caroline Edward Ayad College of Medical Applied Science Jazan University Jazan KSA College of Medical Radiological Science Sudan University of Science and Technology Khartoum Sudan

Snoring is part of the spectrum of sleep disordered breathing. The patients with snoring should be evaluated for nasal airway obstruction. In this study, the upper air way tract was characterized in snoring patients and compared with none snoring using a quantify method for the corresponding anatomic upper air way (UA) parameters examined by Computerized Tomography (CT). Two hundred Asian patients undergoing CT scanning for head and neck were included and were divided into two groups (snoring group [n = 127] and non-snoring group [n = 73]) (mean age: 44.8 ± 15.9 years and 26.2 ± 7.0). Total 8 parameters were measured on sagital reconstructed CT images for each subject. The differences in neck circumference (NC), linear distance between mandibular plane and hyoid bone (Mp-H), upper airway length (UAL), the maximum thickness of the soft palate (SP max), soft palate length (PNS-U), linear distance between anterior and posterior nasal spine (ANS-PNS), retroglosal width (RS), retroplatal width (RP) between the snoring and non-snoring groups were compared statistically using independent sample t-test. Results showed that the NC, UAL, and SP max were significantly higher in snoring group;however RP was found to be significantly lower. Inferior positioning of hyoid bone gives longer measurement for MP-H. In snoring group UAL was found to be significantly different at p ≤ 0.000 between the two genders. All the measured variables showed no significant differences in respect to age. UA CT quantitative features play an important role in the characterization of the anatomy and are compared between snoring patients and non-snoring subjects.

关键词： Snoring Upper Air Way Tract Computerized Tomography

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Burden of pediatric influenza A virus infection post swine-flu H1N1pandemic in Egypt

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Asian Pacific Journal of Tropical Medicine 2013年第9期6卷 693-698页

作者： Adel Khattab Malak Shaheen Terez Kamel Amel el Faramay Safaa abd el rahman Dalia Nabil mohamed Gouda Influenza Advisory Board Egyptian Ministry of Health Chest Department Faculty of MedicineAin Shams University Pediatrics Department Faculty of MedicineAin Shams University Medical Microbiology and Immunology Department Faculty of MedicineAin Shams University

Objectne:To screen children with influenza like illness or with symptoms of acute respiratory tract infections for influenza A virus infection-post swine flu pandemic era-using rapid influenza diagnostic ***:During two year,(2010&2011),1200 children with influenza like illness or acute respiratory tract infections(according to World Health Organization criteria)were *** ages ranged from 2-60 *** aspirates specimens were collected from all children for rapid influenza A diagnostic ***:Influenza A virus rapid test was positive in 47.5%of the children;the majority(89.6%)were presented with lower respiratory tract *** rate and temperature were significantly higher among positive rapid influenza test ***:Influenza A virus infection is still a major cause of respiratory tract infections in Egyptian *** should be considered in all cases with cough and febrile episodes and influenza like symptoms even post swine flu pandemic.

关键词： Influenza A virus Burden Children Influenza like illness Egypt

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Novel potentiometric application for the determination of amprolium HCl in its single and combined dosage form and in chicken liver

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Chinese Chemical Letters 2017年第3期28卷 612-618页

作者： Mai A. Basha mohamed K. abd el-rahman Lories I. Bebawy Maissa Y. Salem National Organization of Drug Control and Research (NODCAR) Cairo 29 Egypt Analytical Chemistry Department Faculty of Pharmacy Cairo University Cairo 11562 Egypt

Three novel amprolium HCl（AMP）-selective electrodes were investigated with 2-nitrophenyl octylether as a plasticiser in a polymeric matrix of polyvinyl chloride（PVC）. Sensor I was fabricated using potassium tetrakis（4-chlorophenyl） borate（Tp ClPB） as a cationic exchanger without incorporation of an *** Ⅱ used 2-hydroxy propyl β-cyclodextrin as an ionophore while sensor Ⅲ used p-tert-butylcalix[8]arene as an ionophore. The three proposed sensors showed Nernestian response slopes of 29.2±0.8,29.3±0.6 and 30.2±0.4 m V/decade over the concentration range from 10–6 to 10–2 mol L_（-1）,respectively. The proposed sensors displayed useful analytical characteristics for the determination of AMP in bulk powder, different pharmaceutical formulations, and chicken liver and in the presence of ethopabate. The proposed method was validated according to ICH guidelines for its linearity, accuracy,precision and robustness.

关键词： Amprolium HCl Cationic exchanger Ionophore Ion selective electrodes Ethopabate Chicken liver

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A comparative study of liquid and solid inner contact roxatidine acetate ion-selective electrode membranes

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Chinese Chemical Letters 2015年第6期26卷 714-720页

作者： mohamed K.abd el-rahman Hala E.Zaazaa Samah S.Abbas Badr el-Zeany Zeinab A.el-Sherif Dalia A.el-Haddad Analytical Chemistry Department Faculty of PharmacyCairo University National Organization for Drug Control and Research

A comparative study was conducted using two designs of a roxatidine acetate （ROX）-selective electrode; a conventional liquid inner contact called electrode A and a graphite-coated solid contact called electrode 13. The fabrication of electrodes was based on roxatidine-tetraphenylborate （ROX-TPB） as an ion-association complex in a PVC matrix using different plasticizers. electrode A has a linear dynamic range of 2.2 ×10^-5 mol/L to 1.0 ×10^-2 mol/L, with a Nernstian slope of 54.7 mV/decade and a detection limit of 1.4 ×10^-6 mol/L. electrode B shows linearity over the concentration range of 1.0×10^-6 mol/L to 1.0×10^-2 tool/L, with a Nernstian slope of 51.2 mV/decade and a limit of detection of 1.1×10^7 mol/L which is remarkably improved as a result of diminishing ion fluxes in this solid contact, ion-selective electrode. The proposed sensors display useful analytical characteristics for the determination of ROX in bulk powder and its pharmaceutical formulation. The present electrodes show clear discrimination of ROX from several inorganic, organic ions, sugars, some common drug excipients and the degradation product （3-[3-（1-piperidinyl methyl） phenoxy] propyl amine） of ROX. Furthermore, the proposed electrodes were utilized for the determination of ROX in human plasma, where electrode B covers drug Cmax which indicated its applicability to pharmacokinetic, bioavailability and bioequivalent studies. The results obtained by the proposed electrodes were statistically analyzed and compared with those obtained by a reported HPLC method. No significant difference for either accuracy or precision was observed.

关键词： Comparative study Roxatidine acetate Liquid inner contact electrode Solid contact electrode Degradation product Plasma

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Some Notes on the Paper “New Common Fixed Point Theorems for Maps on Cone Metric Spaces”

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International Journal of Modern Nonlinear Theory and Application 2013年第2期2卷 150-151页

作者： mohamed abd el-rahman Ahmed Department of Mathematics Faculty of Science Assiut University Assiut Egypt

In this paper, we show that Theorem 2.1 [1] (resp. Theorem 2.2 [1]) is a consequence of Corollary 2.1 [1] ( resp. Corollary 2.2 [1]).

关键词： Cone Metric Weakly Compatible Fixed Point

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A Note on the Paper “Generalized -Contraction for a Pair of Mappings on Cone Metric Spaces”

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Advances in Pure Mathematics 2012年第1期2卷 6-7页

作者： mohamed abd el-rahman Ahmed 不详

We note that Theorem 2.3 [1] is a consequence of the same theorem for one map.

关键词： Generalized φ-Contraction Weakly Compatible Solid Cone

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Synthesis of New Biologically Active Sulphur Containing Compounds Incorporating Diphenyl Ether Moiety

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材料科学与工程（中英文B版） 2011年第4期1卷 461-471页

作者： Kalil Ali H.A. Eyada mohamed T. abd EI-rahman mohamed Hamdy Helal mohamed Sayed abd-elal.el-Gaby Gameel Ahmed mohamed el-Hag Ali Chemistry Department Faculty of Science Ain Shams University Cairo Egypt Chemistry Department Faculty of Science Al-Azhar University Nasr City Cairo Egypt Chemistry Department Faculty of Science Al-Azhar University Assuit Assuit Egypt

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Properties of Titanium Oxynitride Prepared by RF Plasma

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Advances in Chemical Engineering and Science 2015年第1期5卷 1-14页

作者： Fayez M. el-Hossary Niemat Z. Negm Ahmed M. abd el-rahman mohamed Raaif Alzahraa A. abd elmula Physics Department Faculty of Science Sohag University Sohag Egypt

Titanium oxynitrides combine the properties of metallic oxides and nitrides. In this presentation, titanium was oxynitrided using inductively coupled RF plasma in a gas mixture containing 80% N2 and 20% O2. The effect of plasma-processing power from 350 up to 550 W on microstructure, mechanical, tribological, wettability and electrochemical properties of the oxynitrided titanium was examined using different characterizations and testing techniques. The results demonstrated the formation of TiO, TiO2 rutile phase, TiNxOy and Ti2N as a result of plasma oxynitriding. The micro-hardness of the oxynitrided layers increases up to 766 HV0.1 as the plasma-processing power increases up to 550 W. The wear and corrosion resistance are improved for oxynitrided titanium in comparison with untreated samples. Moreover, the friction coefficient decreases from nearly 0.75 for the pure titanium to nearly 0.3 for oxynitrided titanium. The obtained data show an increase of surface energy and wettability of titanium oxynitride as the plasma power increases. The formation of hard oxide and oxynitride phases and the transformation of TiO2 from anatase to rutile structure at relatively high temperature are the main reasons for the good physical and electrochemical properties of titanium oxynitride.

关键词： Plasma Oxynitriding Titanium Corrosion Wear Hardness Surface Energy and Wettability

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Temperature Effects on the electrical Performance of Large Area Multicrystalline Silicon Solar Cells Using the Current Shunt Measuring Technique

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Engineering（科研） 2010年第11期2卷 888-894页

作者： Hala mohamed abdel Mageed Ahmed Faheem Zobaa mohamed Helmy abdel Raouf Abla Hosni abd el-rahman mohamed Mamdouh abdel Aziz 不详

The temperature effects on the electrical performance of a large area multicrystalline silicon solar cell with back-contact technology have been studied in a desert area under ambient conditions using the current shunt measuring technique. Therefore, most of the problems encountered with traditional measuring techniques are avoided. The temperature dependency of the current shunt from 5oC up to 50oC has been investigated. Its temperature coefficient proves to be negligible which means that the temperature dependency of the solar cell is completely independent of the current shunt. The solar module installed in a tilted position at the optimum angle of the location, has been tested in two different seasons (winter and summer). The obtained solar cell short circuit current, open circuit voltage and output power are correlated with the measured incident radiation in both seasons and all results are discussed.

关键词： Large Area Multicrystalline Silicon Solar Cell Current Shunt Measuring Technique Temperature Effects Short Circuit Current Open Circuit Voltage Accumulated Power Incident Radiation

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An Improved Design of a Fully Automated Multiple Output Micropotentiometer

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Energy and Power Engineering 2010年第2期2卷 103-110页

作者： Hala mohamed abdel Mageed Ahmed Faheem Zobaa mohamed Helmy abdel Raouf Abla Hosni abd el-rahman mohamed Mamdouh abdel Aziz National Institute for Standards GizaEgypt University of Exeter ExeterUK Cairo University GizaEgypt

This paper describes in details a new design of a fully automated multiple output micropotentiometer (?pot). A prototype has been built at the National Institute for Standards (NIS), Egypt to establish this highly improved AC voltage source in the millivolt range. The new device offers three different outputs covering a wide frequency range from only one outlet. This valuably supports the precise sourcing ranges of low AC voltage at NIS. The design and the operation theory of this prototype have been discussed in details. An automatic calibration technique has been introduced through specially designed software using the LabVIEW program to enhance the calibration technique and to reduce the uncertainty contributions. Relative small AC-DC differences of our prototype in the three output ranges are fairly verified. The expanded uncertainties of the calibration results for the three output ranges have been faithfully estimated. However, further work is needed to achieve the optimum performance of this new device.

关键词： Multiple Output μpot AC-DC Transfer Standard Single Junction Thermal Converter Calibration Uncertainty

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