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Soft Ionization of Metallo-Mefenamic Using Electrospray Ionization Mass Spectrometry
Abdelhamid, Hani Nasser,Wu, Hui-Fen Korean Society for Mass Spectrometry 2015 Mass spectrometry letters Vol.6 No.2
Detection of mefenamic acid (M, non-steroidal anti-inflammatory drug, NSAIDs) and its metallodrug was investigated using electrospray ionization mass spectrometry (ESI-MS) and fluorescence spectroscopy. ESI-MS data (500 µL, 1×10-3 M) revealed high detection sensitivity for the drug and metallodrug. ESI-MS spectra revealed peaks at 242, 580, and 777 Da corresponding to [M+H]+, [63Cu(M-H)2(H2O)2+H]+, and [56Fe(M-H)3+H]+, respectively. The metal:mefenamic ratios of ESIMS spectra are in complete agreement with the fluorescence spectroscopy results (1:2 for Cu(II) and 1:3 for Fe(III)). ESI is a soft ionization technique that can be used on labile metallo-mefenamic acids and is promising for the detection of these species in environmental samples and biological fluids.
Modeling and simulations of a reformer used in direct reduction of iron
Abdelhamid Ajbar,Khalid Alhumaizi,Mustafa Soliman 한국화학공학회 2011 Korean Journal of Chemical Engineering Vol.28 No.12
This paper presents a detailed modeling and simulations of a reformer unit used in the direct reduction of iron (DRI) process. A one-dimensional heterogeneous model for the catalyst tubes which takes into account the intraparticle mass transfer resistance was developed, while the furnace was modeled with bottom firing configuration. Validation against data from a local iron/steel plant showed satisfactory results. The performance variables of the unit were the process gas temperature, wall temperature and conversions of hydrogen, methane and carbon dioxide. The profiles of these output variables along the distance were calculated. The effect of operating parameters such as inlet temperature,natural gas flow rate and gas composition was also determined.
Abdelhamid, Abdou O.,Attaby, Fawzy A.,Khalifa, Fathy A.,Ghabrial, Sami S. The Pharmaceutical Society of Korea 1992 Archives of Pharmacal Research Vol.15 No.1
Diazotized primary artomatic amines 4 coupled with the ketosulfones 1-3 in ethanol in the presence of sodium acetate at $0^\circ{C}$ to afford the corresponding bydrazones 5-7. Also diazotized 3-aminopyrazoles 14 coupled with 1-3 in ethanolic sodium acetate to give the pyrazolotriazines 18-20 in good yields. Compounds 5-7 and 18 can also be obtained from the reaction of hydraziodoyl halides 8-10 and 21 with sodium benzenesultinate. The hydrazones 11-13 can easy be oxidized to the hydrazones 5-7, using hydrogen peroxide in acetic acid.
Abdelhamid Rmili,Mongi Ben Ouezdou,Mhamed Added,Elhem Ghorbel 한국콘크리트학회 2009 International Journal of Concrete Structures and M Vol.3 No.1
This paper is interested in the incorporation of crushed sand and desert sand in the composition the Self Compacting Concretes (SCC). Desert Dune Sand, which has a fine extra granulometry, and the crushed sand, which contains an important content of fines, can constitute interesting components for SCC. Part II consists in studying the behaviour of SCC containing various sands with different origins. These sands, with different sizes, consist of several combinations of Rolled Sand (RS), crushed sand (CS) and Desert Sand (DS). The study examines the influence of the granular combination of sands on the characteristics in the fresh and the hardened state of SCC. The results of the experimental tests showed an improvement of the workability of the fresh SCC by combining sands of varied granulometry. The addition of the DS to CS or to RS allowed the increase of the mixture viscosity but decreased the mechanical strengths. Furthermore, the CS-RS combinations increased the compressive and the tensile strengths of the studied SCC. The optimized formulations of sands gave the highest performances of the SCC.
Abdelhamid, Abdou O.,Abdou, Sadek E.,Mahgoub, Sayed A. The Pharmaceutical Society of Korea 1992 Archives of Pharmacal Research Vol.15 No.4
Furoyldroximoyl chloride 3d reacted with 2-aminopyridine, 2-aminopyrimidine. O-aminophenol, O-phenylenediamine and aminothiophenol to afford imidazo [1, 2-a]pyridine 6. imidazo[1, 2-a]pyrimidine 8, benzoxadiazine 10, nitrosobenzopyrizine 13a and nitrosobenzothiazine 13b, respectively. Isoxazoline 18 and pyrrolidino[3, 4-d]isoxazolin-4, 6-dione derivatives 19a and 19b obtained by the reaction of 3 with acrylonitrile and N-arylmaleimide. Hydroximoyl chloride 3 reacted with thiophenol and sodium benzene-sulfinate to yield furylglyoxaloxime 16a and 16b, respectively. Hydroximoyl chloride 3 reacted also with some active methylene compound to give isoxazole derivatives 20-23, respectively.
Abdelhamid Rmili,Mongi Ben Ouezdou,Mhamed Added,Elhem Ghorbel 한국콘크리트학회 2009 International Journal of Concrete Structures and M Vol.3 No.1
This paper examines the incorporation of the crushed sand (CS) and desert sand (DS) in the formation of self compacting concrete (SCC). These sands have been substituted for the rolled sand (RS), which is currently the only sand used in concretes and which is likely to run out in our country. DS, which comes from the Tunisian Sahara in the south, is characterized by a tight distribution of grains size. CS, a by-product of careers containing a significant amount of fines up to 15%, is characterized by a spread out granulometry having a maximum diameter of around 5mm. These two sands are considered as aggregates for the SCC. This first part of the study consists in analyzing the influence of the type of sand on the parameters of composition of the SCC. These sands consist of several combinations of 3 sands (DS, CS and RS). The method of formulation of the adopted SCC is based on the filling of the granular void by the paste. The CS substitution to the RS made it possible, for all the proportions, to decrease the granular voids, to increase the compactness of the mixture and to decrease the water and adding fillers proportioning. These results were also obtained for a moderate substitution of DS/CS (< 40%) and a weak ratio of DS/RS (20%). For higher proportions, the addition of DS to CS or RS did not improve the physical characteristics of the SCC granular mixture.
Development of UAV Teleoperation Virtual Environment Based-on GSM Networks and Real Weather Effects
AbdElHamid, Amr,Zong, Peng The Korean Society for Aeronautical and Space Scie 2015 International Journal of Aeronautical and Space Sc Vol.16 No.3
Future Ground Control Stations (GCSs) for Unmanned Aerial Vehicles (UAVs) teleoperation targets better situational awareness by providing extra motion cues to stimulate the vestibular system. This paper proposes a new virtual environment for long range Unmanned Aerial Vehicle (UAV) control via Non-Line-of-Sight (NLoS) communications, which is based on motion platforms. It generates motion cues for the teleoperator for extra sensory stimulation to enhance the guidance performance. The proposed environment employs the distributed component simulation over GSM network as a simulation platform. GSM communications are utilized as a multi-hop communication network, which is similar to global satellite communications. It considers a UAV mathematical model and wind turbulence effects to simulate a realistic UAV dynamics. Moreover, the proposed virtual environment simulates a Multiple Axis Rotating Device (MARD) as Human Machine Interface (HMI) device to provide a complete delay analysis. The demonstrated measurements cover Graphical User Interface (GUI) capabilities, NLoS GSM communications delay, MARD performance, and different software workload. The proposed virtual environment succeeded to provide visual and vestibular feedbacks for teleoperators via GSM networks. The overall system performance is acceptable relative to other Line-of-Sight (LoS) systems, which promises a good potential for future long range, medium altitude UAV teleoperation researches.
Abdelhamid Rmili,Mongi Ben Ouezdou,Mhamed Added,Elhem Ghorbel 한국콘크리트학회 2009 International Journal of Concrete Structures and M Vol.3 No.1
This paper is interested in the incorporation of crushed sand and desert sand in the composition the self compacting concretes (SCC). Desert dune sand, which has a fine extra granulometry, and the crushed sand, which contains an important content of fines, can constitute interesting components for SCC. Part II consists in studying the behaviour of SCC containing various sands with different origins. These sands, with different sizes, consist of several combinations of rolled sand (RS), crushed sand (CS) and desert sand (DS). The study examines the influence of the granular combination of sands on the characteristics in the fresh and the hardened state of SCC. The results of the experimental tests showed an improvement of the workability of the fresh SCC by combining sands of varied granulometry. The addition of the DS to CS or to RS allowed the increase of the mixture viscosity but decreased the mechanical strengths. Furthermore, the CS-RS combinations increased the compressive and the tensile strengths of the studied SCC. The optimized formulations of sands gave the highest performances of the SCC.
Physical properties of Se90-xIn10Sbx glassy system
Abdelhamid BADAOUI,Maamar BELHADJI,Mostefa GHAMNIA 한양대학교 세라믹연구소 2016 Journal of Ceramic Processing Research Vol.17 No.4
The effect of antimony (Sb) addition in SeIn glassy system is theoretically studied, and important physical properties, such asaverage coordination number, lone pair electrons, fragility parameter, heat of atomization, mean bond energy and optical bandgap are evaluated in addition to thermal stability. The values of average coordination number and heat of atomization werefound to increase with increasing Sb content, while the other properties were in decrease. By adding more Sb atoms, the glassysystem becomes less stable thermally. According to the number of zero-frequency mode per atom, which was in decrease, thePhillips’-Thorpe threshold cannot be realized for the considered glassy system.