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Mitochondrial DNA-Based Identification of Developmental Stages and Empty Puparia of Forensically Important Flies(Diptera)in Egypt

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Journal of Forensic Science and Medicine 2018年第3期4卷 129-134页

作者： Hedayat A.Abdel Ghaffar Marie Z.Moftah Alexandre Favereaux mohamed swidan Omar Shalaby Sara El Ramah Reda Gamal Department of Zoology Faculty of ScienceAlexandria University department of Life Science University of Bordeauxinterdisciplinary Institute of Neuroscience UMR 5297CNRSBordeauxFrance department of Biology and Geology Faculty of EducationAlexandria UniversityAlexandriaEgypt department of Life Science Faculty of BiologyTechnische Universitat DresdenDresdenGermany

Relying on morphology in the estimation of postmortem intervals is not always accurate for all life phases of flies,especially for immature *** present study demonstrates the application of cytochrome oxidase I sequences,a partial mitochondrial(mt)gene region,to differentiate forensically important flies in Alexandria,***-three adult flies,larvae,and pupae were collected from rabbit *** were used for *** analysis revealed no significant intraspecific divergence in Diptera ***,a neighbor-coining tree using the Kimura 2-parameter model illustrated reciprocal morphology between *** represented five species,four genera,four subfamilies,two families,and one *** herein identify five different species,Chrysomya albiceps,Chrysomya megacephala,Calliphora vicina,Lucilia sericata,and Ophyra capensis,using mt DNA as a species-specific marker for identification in a local database set-up.

关键词： Cytochrome oxidase Diptera mitochondrial DNA phylogenetic analysis

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Fabrication, Microstructure, Thermal and Electrical Properties of Copper Heat Sink Composites

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Materials Sciences and Applications 2016年第9期7卷 542-561页

作者： Walid Daoush Ahmed swidan Gamal Abd El-Aziz mohamed Abdelhalim Department of Production Technology Faculty of Industrial Education Helwan University Cairo Egypt Present Address: Department of Chemistry Faculty of Science Al-Imam Muhammad Ibn Saud Islamic University Al Riyadh KSA Mechanical Department Ameeria Integrated Technical Cluster Cairo Egypt Mechanical Department Faculty of Industrial Education Suez University Suez Egypt

Copper as well as copper base composites reinforced with coated and uncoated 1 wt% diamond, graphite particles or short carbon fibers are prepared by powder metallurgy process. The reinforcement particles were encapsulated with silver as well as copper layer by using the electroless deposition technique to investigate the influence of the reinforcement surface coating on the microstructure, density, electrical and thermal properties of the sintered samples. The coated and the uncoated powders were cold compacted at 600 MPa, and then sintered at 1173 K (900°C) for 2 h under hydrogen atmosphere. The phase composition, morphology and microstructure of the prepared powders as well as the copper base sintered composites were investigated using X-ray diffraction analysis (XRD) and Scanning Electron Microscope (SEM) equipped with an Energy Dispersive Spectrometer (EDS) respectively. The density of the sintered composites was measured by Archimedes method. The copper base consolidated composites had a density up to 96% and the reinforcement coated particles were distributed uniformly within the copper matrix better than the uncoated one. The electrical resistivity at room temperature and the heat transfer conduction of the produced samples were measured in a temperature range between 323 K (50°C) and 393 K (120°C). The results observed that the sintered materials prepared from the coated powder have lower electrical resistivity than the sintered materials prepared from the mixed powders. On the other hand the thermal conductivity values were calculated using the heat transfer conduction values by means of the Fourier formula. The results observed that the thermal conductivity of copper is (391 W/m·K), 1 wt% diamond/Cu is (408 W/m·K), 1 wt% graphite coated silver/Cu is (393 W/m·K), 1 wt% Cu coated short carbon fiber/Cu is (393 W/m·K), graphite/Cu is (383 W/m·K) and short carbon fiber/Cu is (382 W/m·K). The obtained compos

关键词： Heat Sink Powder Metallurgy Matrix Composites Electrical Resistivity Thermal Conductivity Natural Forced Convection

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