The RFID is a rapidly developing technology. It's used in many applications such as logistics, ti... more The RFID is a rapidly developing technology. It's used in many applications such as logistics, ticketing, security and others. Also, operating in a Dual-Band is a very important advantage. In this paper, a Dual-Band Antenna is studied for the Radio Frequency Identification (RFID) applications using the Method of the moment (MoM). The antenna operates at 2.45GHz and at 5.8GHz.
The effects of active oxygen species on the in vivo activity of recombinant human erythropoietin ... more The effects of active oxygen species on the in vivo activity of recombinant human erythropoietin (EPO) treated by Fenton system, xanthine (X) plus xanthine oxidase (XO) system and hydrogen peroxide (H2O2) has been studied by means of counting the increase in number of hemolyser-resistant cells (HRCs) in EPO-injected mice. The results showed that both Fenton and X plus XO systems caused a significant reduction of the activity in proportion to the concentration of generated active oxygen species. Meanwhile, the treatment of EPO with H2O2 alone resulted in a relatively slight reduction of the activity. Electrophoretic studies on the structure of EPO revealed that its main protein band on sodium dodecyl sulfate-polyacrylamide gel (SDS-PAGE) disappeared in proportion with the extent of exposure to active oxygen generating systems. Both Fenton and X plus XO systems caused a significant loss of fluorescence in the pyridylamino (PA-) sugar chain in proportion to the concentration of generated active oxygen species, and no degradation products in the sugar chain part of the PA-sugar chain were detected. This showed that aromatic groups in EPO were sensitive to attack by active oxygen species. These results provide evidence that hydroxyl radical and other active oxygen species have a potential to react with EPO, leading to a reduction of its in vivo activity.
Canadian Journal of Anaesthesia Journal Canadien D Anesthesie, Apr 1, 1991
A four-year-old deaf girl with a history of convulsions developed polymorphous ventricular tachyc... more A four-year-old deaf girl with a history of convulsions developed polymorphous ventricular tachycardia during induction of anaesthesia. The arrhythmia reverted to sinus rhythm spontaneously. Post-anaesthetic ECG showed marked prolongation of the QTc interval (570-690 msec). Deafness and prolonged QTc interval in association with microcytic-hypochromic anaemia confirmed the diagnosis of the Jervell and Lange-Nielsen syndrome. This case report highlights the potentially lethal complication of halothane anaesthesia in patients with long QTc interval syndrome.
Journal of the American Water Resources Association, 2005
builds on an improved understanding and characterization of ET partitioning between surface stora... more builds on an improved understanding and characterization of ET partitioning between surface storages, vadose zone storage and saturated ground water storage. IHM cons iders evaporative flux from surface sources, proximity of the water table to land surface, relative moisture condition of the unsaturated zone, thickness of the capillary zone, thickness of the root zone and relative plant cover density. The improvements provide a smooth transition to satisfy ET demand between the vadose zone and deeper saturated groundwater. While the IHM approach provid es a more sound representation of the actual soil profile than FHM, and has shown promise at reproducing soil moisture and water table fluctuations as well as field measured ET rates, more rigorous testing is necessary to understand the robustness and/or limitations of this methodology.
In this paper, a monopole Antenna is studied for the 1710-1880MHz LTE (Long Term Evolution) Band,... more In this paper, a monopole Antenna is studied for the 1710-1880MHz LTE (Long Term Evolution) Band, for the 1900-2170MHz UMTS (Universal Mobile Telecommunications System) band, and for the 2.3GHz WIMAX (Worldwide Interoperability for Microwave Access) band. For its large size, this antenna is designed to be installed in outdoor and indoor antennas.
... Mono Q column chromatography and their ... Ten erythropoietin (EPO) fractions differing in si... more ... Mono Q column chromatography and their ... Ten erythropoietin (EPO) fractions differing in sialic acid content, ranging from 9.5 to 13.8 molmol -I of EPO, were obtained from baby hamster kidney celt-derived recombinant human EPO by Mono Q column chromatography. ...
Computers in Agriculture and Natural Resources, 23-25 July 2006, Orlando Florida, 2006
1 International Center for Agricultural Research in the Dry Areas (ICARDA), PO Box 5466, Aleppo, ... more 1 International Center for Agricultural Research in the Dry Areas (ICARDA), PO Box 5466, Aleppo, Syria 2 Central Laboratory for Agricultural Expert Systems (CLAES), PO Box 438, Dokki, Giza, Egypt 3 International Crop Research Institute for the Semi Arid Tropics ( ...
Localización: Hydrological science and technology, ISSN 0887-686X, Vol. 21, Nº. 1-4, 2005 (Ejempl... more Localización: Hydrological science and technology, ISSN 0887-686X, Vol. 21, Nº. 1-4, 2005 (Ejemplar dedicado a: 2004 Annual Meeting and International Conference of the American Institute of Hydrology: Integrated water resources management), págs. 157-176
Información del artículo A new discretization scheme for integrated surface and groundwater model... more Información del artículo A new discretization scheme for integrated surface and groundwater modeling.
Transactions on Networks and Communications, Aug 25, 2014
Four iterations of a Coplanar Waveguide (CPW)-Fed KOCH SNOWFLAKE fractal antenna are studied. Inc... more Four iterations of a Coplanar Waveguide (CPW)-Fed KOCH SNOWFLAKE fractal antenna are studied. Increasing the number of iterations allow us obtaining a simple and miniaturized antenna with good performances, operating for Ultra Wide Band (UWB) applications.
The RFID is a rapidly developing technology. It's used in many applications such as logistics, ti... more The RFID is a rapidly developing technology. It's used in many applications such as logistics, ticketing, security and others. Also, operating in a Dual-Band is a very important advantage. In this paper, a Dual-Band Antenna is studied for the Radio Frequency Identification (RFID) applications using the Method of the moment (MoM). The antenna operates at 2.45GHz and at 5.8GHz.
The effects of active oxygen species on the in vivo activity of recombinant human erythropoietin ... more The effects of active oxygen species on the in vivo activity of recombinant human erythropoietin (EPO) treated by Fenton system, xanthine (X) plus xanthine oxidase (XO) system and hydrogen peroxide (H2O2) has been studied by means of counting the increase in number of hemolyser-resistant cells (HRCs) in EPO-injected mice. The results showed that both Fenton and X plus XO systems caused a significant reduction of the activity in proportion to the concentration of generated active oxygen species. Meanwhile, the treatment of EPO with H2O2 alone resulted in a relatively slight reduction of the activity. Electrophoretic studies on the structure of EPO revealed that its main protein band on sodium dodecyl sulfate-polyacrylamide gel (SDS-PAGE) disappeared in proportion with the extent of exposure to active oxygen generating systems. Both Fenton and X plus XO systems caused a significant loss of fluorescence in the pyridylamino (PA-) sugar chain in proportion to the concentration of generated active oxygen species, and no degradation products in the sugar chain part of the PA-sugar chain were detected. This showed that aromatic groups in EPO were sensitive to attack by active oxygen species. These results provide evidence that hydroxyl radical and other active oxygen species have a potential to react with EPO, leading to a reduction of its in vivo activity.
Canadian Journal of Anaesthesia Journal Canadien D Anesthesie, Apr 1, 1991
A four-year-old deaf girl with a history of convulsions developed polymorphous ventricular tachyc... more A four-year-old deaf girl with a history of convulsions developed polymorphous ventricular tachycardia during induction of anaesthesia. The arrhythmia reverted to sinus rhythm spontaneously. Post-anaesthetic ECG showed marked prolongation of the QTc interval (570-690 msec). Deafness and prolonged QTc interval in association with microcytic-hypochromic anaemia confirmed the diagnosis of the Jervell and Lange-Nielsen syndrome. This case report highlights the potentially lethal complication of halothane anaesthesia in patients with long QTc interval syndrome.
Journal of the American Water Resources Association, 2005
builds on an improved understanding and characterization of ET partitioning between surface stora... more builds on an improved understanding and characterization of ET partitioning between surface storages, vadose zone storage and saturated ground water storage. IHM cons iders evaporative flux from surface sources, proximity of the water table to land surface, relative moisture condition of the unsaturated zone, thickness of the capillary zone, thickness of the root zone and relative plant cover density. The improvements provide a smooth transition to satisfy ET demand between the vadose zone and deeper saturated groundwater. While the IHM approach provid es a more sound representation of the actual soil profile than FHM, and has shown promise at reproducing soil moisture and water table fluctuations as well as field measured ET rates, more rigorous testing is necessary to understand the robustness and/or limitations of this methodology.
In this paper, a monopole Antenna is studied for the 1710-1880MHz LTE (Long Term Evolution) Band,... more In this paper, a monopole Antenna is studied for the 1710-1880MHz LTE (Long Term Evolution) Band, for the 1900-2170MHz UMTS (Universal Mobile Telecommunications System) band, and for the 2.3GHz WIMAX (Worldwide Interoperability for Microwave Access) band. For its large size, this antenna is designed to be installed in outdoor and indoor antennas.
... Mono Q column chromatography and their ... Ten erythropoietin (EPO) fractions differing in si... more ... Mono Q column chromatography and their ... Ten erythropoietin (EPO) fractions differing in sialic acid content, ranging from 9.5 to 13.8 molmol -I of EPO, were obtained from baby hamster kidney celt-derived recombinant human EPO by Mono Q column chromatography. ...
Computers in Agriculture and Natural Resources, 23-25 July 2006, Orlando Florida, 2006
1 International Center for Agricultural Research in the Dry Areas (ICARDA), PO Box 5466, Aleppo, ... more 1 International Center for Agricultural Research in the Dry Areas (ICARDA), PO Box 5466, Aleppo, Syria 2 Central Laboratory for Agricultural Expert Systems (CLAES), PO Box 438, Dokki, Giza, Egypt 3 International Crop Research Institute for the Semi Arid Tropics ( ...
Localización: Hydrological science and technology, ISSN 0887-686X, Vol. 21, Nº. 1-4, 2005 (Ejempl... more Localización: Hydrological science and technology, ISSN 0887-686X, Vol. 21, Nº. 1-4, 2005 (Ejemplar dedicado a: 2004 Annual Meeting and International Conference of the American Institute of Hydrology: Integrated water resources management), págs. 157-176
Información del artículo A new discretization scheme for integrated surface and groundwater model... more Información del artículo A new discretization scheme for integrated surface and groundwater modeling.
Transactions on Networks and Communications, Aug 25, 2014
Four iterations of a Coplanar Waveguide (CPW)-Fed KOCH SNOWFLAKE fractal antenna are studied. Inc... more Four iterations of a Coplanar Waveguide (CPW)-Fed KOCH SNOWFLAKE fractal antenna are studied. Increasing the number of iterations allow us obtaining a simple and miniaturized antenna with good performances, operating for Ultra Wide Band (UWB) applications.
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Papers by Ahmed Said