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The adsorption and corrosion inhibition of 8-hydroxy-7-quinolinecarboxaldehyde derivatives on C-steel surface in hydrochloric acid

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Chinese Journal of Chemical Engineering 2017年第9期25卷 1256-1265页

作者： A.m.eldesoky S.G.Nozha Engineering Chemistry Department High Institute of Engineering & Technology Al-Qunfudah Center for Scientific Research (QCSR) Al-Qunfudah University College Umm Al-Qura University ministry of Health Domyat Laboratory

The protection influence of 8-hydroxy-7-quinolinecarboxaldehyde derivatives against C-steel corrosion was studied in 2 mol·L^(-1)HCl solutions at 30 °C. measurements were conducted under various experimental conditions using weight loss, potentiodynamic polarization, electrochemical impedance spectroscopy(EiS) and electrochemical frequency modulation(EFm) techniques. These studies have shown that 8-hydroxy-7-quinolinecarboxaldehyde derivatives are very good "green", mixed-type inhibitors. Corrosion rates obtained from both EFm and EiS methods are comparable with those recorded using Tafel extrapolation method, confirming validation of corrosion rates measured by the latter. The inhibitive action of these 8-hydroxy-7-quinolinecarboxaldehyde derivatives was discussed in terms of blocking the electrode surface by adsorption of the molecules through the active centers contained in their structures following Langmuir adsorption isotherm. Quantum chemical method was also employed to explore the relationship between the inhibitor molecular properties and its protection efficiency.

关键词： 8-Hydroxy-7-quinolinecarboxaldehyde derivatives C-steel HCl EFm

mathematical Analysis of Unsteady mHD Blood Flow through Parallel Plate Channel with Heat Source

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World Journal of mechanics 2012年第3期2卷 131-137页

作者： islam m. eldesoky Basic Engineering Sciences Department Faculty of Engineering Elmenoufia University Shibin El Kom Egypt

in the present study, a mathematical model of unsteady blood flow through parallel plate channel under the action of an applied constant transverse magnetic field is proposed. The model is subjected to heat source. Analytical expressions are obtained by choosing the axial velocity;temperature distribution and the normal velocity of the blood depend on y and t only to convert the system of partial differential equations into system of ordinary differential equations under the conditions defined in our model. The model has been analyzed to find the effects of various parameters such as, Hartmann number, heat source parameter and Prandtl number on the axial velocity, temperature distribution and the normal velocity. The numerical solutions of axial velocity, temperature distributions and normal velocity are shown graphically for better understanding of the problem. Hence, the present mathematical model gives a simple form of axial velocity, temperature distribution and normal velocity of the blood flow so that it will help not only people working in the field of Physiological fluid dynamics but also to the medical practitioners.

关键词： Blood Flow Parallel Plate Channel Boundary Layer Heat Source magnetic Field

The Dosimetric Effects of Different Beam Energy on Physical Dose Distributions in imRT Based on Analysis of Physical indices

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Journal of Cancer Therapy 2013年第11期4卷 33-43页

作者： ismail eldesoky Ehab m. Attalla Wael m. Elshemey Children’s Cancer Hospital Cairo Egypt Department of Biophysics Faculty of Science Cairo University Cairo Egypt

This work aimed at evaluating the effect of 6- and 10-mV photon energies on intensity-modulated radiation therapy (imRT) treatment plan outcome in different selected diagnostic cases. For such purpose, 19 patients, with different types of non CNS solid tumers, were selected. Clinical step-and-shoot imRT treatment plans were designed for delivery on a Siemens Oncor accelerator with 82 leafs;multi-leaf collimators (mLCs). To ensure that the similarity or difference among the plans is due to energy alone, the same optimization constraints were applied for both energy plans. All the parameters like beam angles, number of beams, were kept constant to achieve the same clinical objectives. The Comparative evaluation was based on dose-volumetric analysis of both energy imRT plans. Both qualitative and quantitative methods were used. Several physical indices for Planning Target Volume (PTV), the relevant Organs at Risk (OARs) as mean dose (Dmean), maximum dose (Dmax), 95% dose (D95), integral dose, total number of segments, and the number of mU were applied. Homogeneity index and conformation number were two other evaluation parameters that were considered in this study. Collectively, the use of 6 mV photons was dosimetrically comparable with 10 mV photons in terms of target coverage, homogeneity, conformity, and OAR savings. While 10-mV plans showed a significant reduction in the number of mUs that varied between 4.2% and 16.6% (P-value = 0.0001) for the different cases compared to 6-mV. The percentage volumes of each patient receiving 2 Gy and 5 Gy were compared for the two energies. The general trend was that 6-mV plans had the highest percentage volume, (P-value = 0.0001, P-value = 0.006) respectively. 10-mV beams actually decreased the integral dose (from average 183.27 ± 152.38 Gy-Kg to 178.08 ± 147.71 Gy-Kg, P-value = 0.004) compared with 6-mV. in general, comparison of the above parameters showed statistically significant differences between 6-mV and 10-mV groups. Ba

关键词： 6- and 10-mV Photon Energies intensity-modulated Radiation Therapy (imRT) Dose-Volumetric Analysis

Simultaneous integrated boost imRT in pediatric:evaluation for two commercial treatment planning systems

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The Chinese-German Journal of Clinical Oncology 2013年第1期12卷 6-14页

作者： Ehab m.Attalla ismail eldesoky Eman Eldebawy Radiotherapy&Nuclear medicine Department National Cancer Institute Cairo University Children Cancer Hospital

Objective： The aim of the work was to compare the dosimetric results that were obtained by using two treatment planning systems （TPS） Siemens KonRad version 2.2.23, Elekta XiO version 4.4 to perform a simultaneous integrated boost （SiB） for head and neck and central nervous system （CNS） cases in paediatric patients. methods： The CT scan data for five paediatric patients, with head and neck and CNS tumors, were transferred into both of the TPSs. Clinical step-and-shoot intensity-modulated radiotherapy （imRT） treatment plans were designed using 6 mV photon beam for delivery on a Siemens Oncor Accelerator with multileaf collimator mLC （82 leaf）. Plans were optimized to achieve the same clinical objectives using the same beam energy, number and direction of beams. The analysis was based on isodose distributions, the dose volume histogram （DVH） for planning target volume （PTV） and the relevant organs at risk （OARs） as well as volume receiving 2 Gy and 5 Gy, also total number of segments, mU/segment, and the number of mU/cGy had been investigated. Treatment delivery time and conformation number were two other parameters in this study. Results： The segmentation using KonRad was more efficient, resulting in fewer segments （reduction between 13.2% and 48.3%）, fewer m Us （reduction between 10.7% and 33%） and that reflected on treatment delivery times to be shorter by up to 8 rain or 46%. in most of the cases KonRad had the highest volume receiving in excess of 2 and 5 Gy, and XiO showed the lowest. Also KonRad achieved slightly better conformality （0.76 ± 0.054） than XiO （0.73 ± 0.05） while XiO presented a higher modulation factor value （3.3 mU/cGy） than KonRad （2.4 mU/cGy）. Conclusion： The KonRad treatment planning system was found to be superior to the XiO treatment planning system. This is true for the possible increase of radiation-induced secondary malignancies as well as for the local control.

关键词： intensity-modulated radiotherapy (imRT) KonRad simultaneous integrated boost (SiB) XiO

Numerical Study of Slip Effect of Unsteady mHD Pulsatile Flow through Porous medium in an Artery Using Generalized Differential Quadrature method (Comparative Study)

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World Journal of Engineering and Technology 2014年第2期2卷 131-148页

作者： islam m. eldesoky mohamed H. Kamel Ramzy m. Abumandour Department of Basic Engineering Sciences Faculty of Engineering Menofia University Shebien El-Kom Egypt Department of Engineering mathematics and Physics Faculty of Engineering Cairo University Giza Egypt

The unsteady pulsatile flow of blood through porous medium in an artery has been studied under the influence of periodic body acceleration and slip condition by considering blood as incompressible Newtonian electrically conducting fluid in the presence of magnetic field. in this paper, a new technique of differential quadrature method is introduced to find numerical solution of non-linear partial differential equations such as the equation of motion of this problem “Navier-Stokes equation”. The presence of the nonlinearity in the problem leads to severe difficulties in the solution approximation. in construction of the numerical scheme “a new algorithm” a generalized differential quadrature method (GDQm) is to use for derivatives with respect to space variables of differential equations and for the time derivative applying fourth order RungeKutta method (RKm). The GDQm changed the nonlinear partial differential equations into a system of nonlinear ordinary differential equations (ODEs). The obtained system of ODEs is solved by 4th order RKm. This combination of DQm and 4th order RKm gives a very good numerical technique for solving time dependent problems. The algorithm is coded in matlab 7.***.0.739 and the simulations are run on a Pentium 4 CPU 900 mHz with 1 GB memory capacity. The effects of slip condition, magnetic field, porous medium, and body acceleration have been discussed. The numerical results show that the proposed method is more accurate and convergent than other numerical methods in literature. The method is illustrated and compared with the exact and analytical solutions and it is found that the proposed method gives a better accuracy and is quite easy to implement.

关键词： Pulsatile Blood Flow magnetic Field Body Acceleration Porous medium Differential

BOD Composite as a New Eco-Friendly Corrosion inhibitor

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材料科学与工程（中英文B版） 2020年第1期10卷 18-33页

作者： A.m.eldesoky A.Attia Omayma E.Ahmed m.Abo-Elsoud Engineering Chemistry Department High Institute of Engineering&TechnologyNew Damietta 34517Egypt Chemistry Department Mansoura UniversityFaculty of ScienceMansoura 35516Egypt Evaluation and Analytical Department Egyptian Petroleum Research institute Nasr CityCairo 11717Egypt Physics Department Umm Al-Qura UniversityAl-Qunfudhah University CollegeAl-Qunfudhah 21912Saudi Arabia Chemistry Department Umm Al-Qura UniversityAl-Qunfudhah University CollegeAl-Qunfudhah 21912Saudi Arabia Chemistry Department Najran UniversityFaculty of Science and ArtsNajran 21497Saudi Arabia

BOD composite,(E)-4-(2-(benzo[d]oxazol-2-yl)vinyl)-N,N-dimethylaniline is a new eco-friendly corrosion inhibitor versus P355 Carbon Steel(Cs).BOD was examined in 1.0 N HCl corrosive solution utilizing TP,EiS and EFm *** curves show that adsorption of BOD increases the transfer resistance and decrease the capacitance of interface metal/*** docking was utilized to predict the binding between BOD composite with the receptor of 3tt8-hormone of crystal structure analysis of Cu Human insulin *** morphology of inhibited P355 Cs was analyzed by checking electron magnifying instrument innovation with energy dispersive X-beam spectroscopy(SEm EDX).

关键词： BOD eco-friendly P355 Cs SEm EDX molecular docking

Electrochemical and Surface Characterization Studies of 2-amino-6-methyl-5-oxo-4-phenyl-5,6-dihydro-4H-pyrano[3,2-c]quinoline-3-carbonitrile Compound on Copper in 2 m HNO<sub>3</sub>

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Journal of materials Science and Chemical Engineering 2019年第12期7卷 71-86页

作者： Ahmed m. eldesoky Azza m. Attia Omayma E. Ahmed mohamed A. Abo-Elsoud Engineering Chemistry Department High Institute of Engineering & Technology New Damietta Egypt Chemistry Department Al-Qunfudah University College Umm Al-Qura University Mecca KSA Department of Chemistry Faculty of Science Mansoura University Mansoura Egypt Faculty of Science and Arts Chemistry Department Najran University Najran KSA Evaluation and Analytical Department Egyptian Petroleum Research Institute Cairo Egypt Physics Department The University College in Al-Qunfudah Umm Al-Qura University Mecca KSA

The corrosion hindrance of Cu in 2.0 m HNO3 solution by 2-amino-6-methyl-5-oxo-4-phenyl-5,6-dihydro-4H-pyrano[3,2-c]quinoline-3-carbonitrile compound has been studied, using Potentiodynamic Polarization (PP), AC impedance (EiS), Electrochemical Frequency modulation (EFm) techniques. Also, EiS test was utilized to confirm the corrosion protection mechanism. 2-amino-6-methyl-5-oxo-4-phenyl-5,6-dihydro-4H-pyrano[3,2-c]quinoline-3-carbonitrile compound is suggested as a mixed kind inhibitor. SEm and EDX investigations of the Cu in 2.0 m HNO3 surface revealed that assembles protect Cu from corrosion by adsorption on its surfaces by a forming coating film. Clearly, the assembled mechanisms play a role as a barrier to corrosive solution.

关键词： Carbonitrile Cu SEm EDX EiS EFm

Pre-treatment verification of intensity-modulated radiation therapy in paediatric patients: adequate estimation for tolerance limits

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The Chinese-German Journal of Clinical Oncology 2012年第11期11卷 621-625页

作者： Ehab m. Attalla Hassan Shafik Hany Ammar ismail eldesoky mohamed Farouk Shimaa Shoier Radiotherapy & Nuclear medicine Department National Cancer Institute Cairo University Children Cancer Hospital

Objective: The objective of this work was to establish adequate tolerance limits based on a certain defined institutional indices and generate published data presenting our results to the radiotherapy community. methods: One hundred paediatric patients were treated using 6-mV X-ray beams produced by Siemens ONCOR Expression linear accelerator. The clinical step-and-shoot intensity-modulated radiation therapy (imRT) treatment plans were designed using KonRad release 2.2.23. For two treatment sites (abdomen, head and neck), the fluence maps generated by the treatment planning system were all delivered for the quality assurance (QA) which included absolute dose verification for all treatment fields, relative dose verification for each treatment field. Results: The 724 fluence maps were analyzed at three different criteria using the gamma index tool. The 3% dose difference of local prescribed dose /3 mm was considered adequate. The passing rate for all fields of all plans always exceeded 70%. The dose differences between the measured and calculated doses ranged from -2.2% to +4% [mean and standard deviation (s): 1.4 ± 1.5] for the abdominal case, and from -3.3% to +5.6% (1.3 ± 1.6) for head and neck case with total confidence limit 0.046 (4.6%). The 14/100 (14%) of the absolute point dose measurements were out of ±3% from the dose predicted by the treatment planning system. Only two cases were below -3%, while 12 cases over +3%. Conclusion: At 3% dose difference of local prescribed dose /3 mm criteria, a 75% passing a gamma criterion and 3% for absolute point dose can be achieved for abdomen and head and neck treatments site. We considered the tolerance limits based on these indices for imRT QA adequate.

关键词： intensity-modulated radiation therapy (imRT) quality assurance (QA) tolerance paediatric patient

The impact of intensity modulated radiotherapy on the skin dose for deep seated tumors

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The Chinese-German Journal of Clinical Oncology 2013年第4期12卷 194-198页

作者： H. S. Abou-Elenein Ehab m. Attalla Hany Ammar ismail eldesoky mohamed Farouk Shaimaa Shoer Children's Cancer Hospital Cairo University National Cancer institute Cairo University

Objective: The purpose of this study was to investigate the impact of intensity modulated radiotherapy (imRT) on surface doses for brain, abdomen and pelvis deep located tumors treated with 6 mV photon and to evaluate the skin dose calculation accuracy of the XiO 4.04 treatment planning system. methods: more investigations for the influences of imRT on skin doses would increase its applications for many treatment sites. measuring skin doses in real treatment situations would reduce the uncertainty of skin dose prediction. in this work a pediatric human phantom was covered by a layer of 1 mm bolus at three treatment sites and thermoluminescent dosimeter (TLD) chips were inserted into the bolus at each treatment site before CT scan. Two different treatment plans [three-dimensional conformal radiation therapy (3DCRT) and imRT] for each treatment sites were performed on XiO 4.04 treatment planning system using superposition algorism. Results: The results showed that the surface doses for 3DCRT were higher than the surface doses in imRT by 1.6%, 2.5% and 3.2% for brain, abdomen and pelvis sites respectively. There was good agreement between measured and calculated surface doses, where the calculated surface dose was 15.5% for brain tumor calculated with 3DCRT whereas the measured surface dose was 12.1%. For abdomen site the calculated surface dose for imRT treatment plan was 16.5% whereas the measured surface dose was 12.6%. Conclusion: The skin dose in imRT for deep seated tumors is lower than that in 3DCRT which is another advantage for the imRT. The TLD readings showed that the difference between the calculated and measured point dose is negligible. The superposition calculation algorism of the XiO 4.04 treatment planning system modeled the superficial dose well.

关键词： skin dose intensity modulated radiotherapy (imRT) three-dimensional conformal radiation therapy (3DCRT) thermoluminescent dosimeter (TLD) dose calculation