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Journal of Rare Earths 2014年第1期32卷 37-42页

作者： m.m.S.Sanad m.m.Rashad E.A.Abdel-Aal m.f.el-shahat K.Powers Central metallurgical R & D Institute Particle Engineering Research Center University of Florida faculty of Science Ain Shams University

Dielectric ceramics of m（x）Al6（1-x）Si2O13 doped mullite were synthesized via co-precipitation technique. The X-ray diffrac-tion profiles revealed that these nanoparticles were crystallized well and the volume of mullite unit cell was increased as a function of the ionic radius of dopant ion. TEm images showed regular orthorhombic crystal morphology for the pure mullite sample. meanwhile, the doped samples exhibited slightly distorted crystal morphology of larger particle sizes. DSC thermograms evinced that the exo-thermic peak temperature of mullite was shifted to the lower value with m3＋ion insertion. The photoluminescence spectra were stud-ied for mullite samples, and it was found that the intensity of the emission spectra was affected by the m3＋ion type. It was found that, Y3＋doped mullite achieved the minimum dielectric loss value of 0.01 in the radio wave frequency region （1 mHz）. meanwhile, Gd3＋doped mullite achieved the minimum dielectric loss value of 0.09 in the microwave frequency region （1 GHz）.

关键词： rare earths doped mullite photoluminescence crystallization temperature dielectric ceramics

electroslag Refining of CrNimoWmnV Ultrahigh-Strength Steel

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Planning Target Volume margin in Linac-Based Stereotactic Radiosurgery for Brain metastases

Journal of minerals and materials Characterization and Engineering（矿物质和材料特性和工程） 2017年第6期

作者： mohammedAli mamdouhEissa Hodaelfaramawy DavidPorter JukkaKömi m.f.el-shahat Tahamattar

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Journal of Cancer Therapy 2024年第7期15卷 265-272页

作者： Hany S. Attallah Radwa m. Hamed Khaled m. el-shahat Aliaa mahmoud mahmoud Abdallah Ibraheem Haggag Emad moustafa Adel Yassin Department of Radiation Oncology International Medical Center (IMC) Cairo Egypt Department of Radiation Oncology Armed Forces Medical Collogue (AFCM) Cairo Egypt Department of medical Physics Al Azhar University Cairo Egypt Department of medical Physics International Medical Center (IMC) Cairo Egypt Department of medical Physics Department of Clinical Oncology Faculty of Medicine Zagazig University Zagazig Egypt

Background: The treatment of brain metastases with radiotherapy has shifted to the use of Stereotactic Radio-surgery (SRS). The technical issue of expanding the treatment volume around the Gross Tumor Volume (GTV) is a current debate. Radiotherapy centers use variable GTV-PTV margins, ranging from one to 2 mm. material and methods: We performed a dosimetric comparison in plans of twenty patients using three margins: PTV zero, PTV1, and PTV2. We also developed imaginary Peel volumes. These volumes are described as follows: Peel1 = PTV1 − GTV, Peel2 = PTV2 − GTV. Results: Our results showed that the mean PTV volume differed significantly across the different margins (p = 0.000). The V12 of the brain significantly varied as a function of PTV margin (p = 0.000). The target coverage and plan quality indices were not significantly different. The Peel volume dosimetric analysis showed that the mean dose was significantly higher in the nearby normal brain tissue: Peel1 (p = 0.022) and Peel 2 (p = 0.013). Conclusion: According to our dosimetric analysis, expanding the GTV into a PTV by 1 mm margin is more convenient than 2 mm.

关键词： SRS Brain metastases PTV

Efficiency of Bio-fertilizing as One of the Natural Alternatives to Improve the Growth of Khaya senegalensis and Swietenia mahagoni Trees and for Sustainability

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Agricultural Sciences 2024年第2期15卷 292-310页

作者： Safaa A. S. Ghorab Nashwa H. mohamed Nader A. el-Shanhorey Nabal S. el-shahat Amr R. Rabie forestry and Timber Trees Department Horticulture Research Institute Agricultural Research Center Ismailia Egypt forestry and Timber Trees Department Horticulture Research Institute Agricultural Research Center Alexandria Egypt Botanical Gardens Department Horticulture Research Institute Agricultural Research Center Alexandria Egypt forestry and Timber Trees Department Horticulture Research Institute Agricultural Research Center Giza Egypt

A field experiment was carried out at Ismailia Research Station, Ismailia Governorate from 2020-2022 to improve the growth of Khaya senegalensis and Swietenia mahagoni by using a combination of mineral fertilizer (NPK) and biological fertilizer (Azotobacter chroococcum, Bacillus megatherium, and Bacillus circulant) as recommended dose under new sandy soils conditions. Split plot designed with four treatments (Control, (50% mineral fertilizer (m.) + 50% Biological fertilizer (Bio.)), 100% m. and 100% Bio.) of each species. Vegetative growth, leaf area, tree biomass, stored carbon, basal area, tree volume, and in the soil both of microbial account and mineral content were determined. The experimental results showed no significant differences between studied species among the most studied parameters except for Khaya senegalensis which gave the highest significant difference in root biomass and below-stored carbon than Swietenia mahagoni. Evidently, the highest significant growth parameters were 100% mineral fertilizer followed by (50% m. + 50% Bio.) as compared with control. No significant difference between 100% m. and (50% m. + 50% Bio.) of shoot dry biomass (15.19 and 12.02 kg, respectively) and above-stored carbon (0.28 and 0.22 mt, respectively). microbial account and mineral content in soil were improved after cultivation of tree species compared to before planting and control, especially with 50% mineral fertilizer and 50% bio-fertilizer treatment. In conclusion, a treatment containing 50% mineral fertilizer and 50% bio-fertilizer has led to the ideal Khaya senegalensis and Swietenia mahagoni growth in sandy soil for cheaper and sustainable.

关键词： Khaya senegalensis Swietenia mahagoni mineral fertilizer Bio-fertilizer Growth Parameters Tree Biomass Stored Carbon Sustainable

Some studies of the interaction between two two-level atoms and SU(1,1) quantum systems

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Chinese Physics B 2018年第10期27卷 116-122页

作者： T m el-shahat m Kh Ismail faculty of Science Al-Azhar University. Assiut 71524 Egypt

Herein, we present an approach to look for the best phenomenon to measure quantum correlation. The system of two isolated qubits each interacting with a single-mode cavity was theoretically created to study the quantum correlation. Some of the phenomena, such as the quantum discord and concurrence, were generated through such a system. The influences of initial state purity, qubit motion, and detuning parameters were discussed for the phenomena. These parameters for a specific value show that the behavior of phenomena are analogous. It is interesting to mention that some values of detuning undergo a sudden death of phenomena, and the quantum discord still captures the qubits quantum correlation. We predict that the quantum discord may be a better measure of quantum correlation than concurrence.

关键词： an isolated atom with a cavity SU (1,1) quantum discord concurrence

Properties of Entropy and Entanglement of Two—mode Nonlinear Coherent States

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Communications in Theoretical Physics 2002年第6X期38卷 715-728页

作者： mahmoudAbdel-Aty Tarekm.el-shahat 等 mathematicsDepartment FacultyofScienceSouthValleyUniversitySohagEgypt InstitutfurmathematikundihreDidaktik UniversitatFlensburgMuewikerStr.77D-29943FlensburgGermany mathematicsDep

In this communication, two-mode nonlinear coherent states are reviewed and special cases are *** from a three-level atom coupled to two modes of radiation with any form of nonlinearities of the two-modefields, we derive a Raman-coupled effective Hamiltonian by a unitary transformation, evaluated perturbatively in couplingconstants. We use the quantum entropy to measure the degree of entanglement in the time development of an effectivetwo-level atom interacting with two-mode nonlinear-coherent states. The results show that the nonlinearity effect yieldsthe superstructure of atomic Rabi oscillations and the effect of the Stark shift changes the quasiperiod of the field entropyevolution and entanglement between the particle and the field. A possible experimental test of a new effect is proposed.

关键词：量子信息处理双模非线性相子态熵特性

Planning Target Volume margin in Linac-Based Stereotactic Radiosurgery for Brain metastases

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Valorization of sustainable vegetable oil deodorizer distillate as a novel fatliquor

Journal of Cancer Therapy（癌症治疗） 2024年第7期 265页

作者： Hany S.Attallah Radwa m.Hamed Khaled m.el-shahat Aliaa mahmoud mahmoud Abdallah Ibraheem Haggag Emad moustafa Adel Yassin

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Collagen and Leather 2023年第3期5卷 60-72页

作者： el-shahat H.A.Nashy Adel Gabr Abdel-Razek minar mahmoud m.Hassanein Ghada A.Abo-elwafa Hamed elsayed Chemical Industries Research Institute National Research CentreDokkiCairo 12622Egypt Department of fats and Oils National Research CentreDokkiCairo 12622Egypt

The deodorizer distillate(DD)is a byproduct of vegetable oil processing industry and is rich in functional bioactive *** study aimed to employ phosphorylation modification for DD to produce a new sustainable *** bioactive ingredients in DD,namely fatty acids,sterols,and tocopherols,were determined by using HPLC and *** results revealed that the DD sample contained a high percentage of unsaturated fatty acids(72.3%)and high levels ofγandδ-tocopherols(54.8%and 31.60%,respectively).mechanical parameters(tensile strength,elongation at break,and tear strength)of leather were improved after being treated with the prepared fatliquor ***,SEm showed that the texture of the fatliquored leather had been remarkably ***,the fatliquored leather possessed effective antibacterial effect against the specified+ve,-ve bacteria,and Candida albicans *** strength,fullness,soft handle,and elasticity of leather were all improved,and the grain of leather was protected from becoming loose after drying.

关键词： Vegetable oil Deodorizer distillate Bioactive components fatliquor Phosphorylation Chrome tanned leather

Effects of penicillamine, hypotaurine, and epinephrine on motility, hyperactivity, acrosome reaction of fresh ram sperm

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Asian pacific Journal of Reproduction 2017年第6期6卷 283-288页

作者： K.H.el-shahat m.I.Taysser m.R.Badr K.A.Zaki Department of Theriogenology Faculty of Veterinary MedicineCairo University Department of Animal Reproduction and Artificial Insemination Reproduction Research Institute Agriculture Research CenterEgypt el-Shieh Zaied Veterinary Clinic Egypt

Objective:To determine the effects of different concentrations of penicillamine, hypotaurine, and epinephrine (PHE) as well as incubation time on motility, hyperactivity and acrosome reaction (AR) of ram spermin ***: freshly ejaculated spermatozoa from three ram were collected, pooled and subjected to swim up technique in modified sperm Tyrode's albumin lactate pyruvate medium supplemented with different concentrations of PHE (10, 20, 30, 40, 50, 75 and 100 mm/mL). Then best concentrations were compared and examined for motility, hyperactivity and ***: A high concentrations of PHE (30, 40, 50, 75 and 100mm/mL) showed a significant increase in motility when compared to control immediately after dilution and exist for the first and second hour of incubation period. However, when longer incubation time were used, a significant (Pmotility was achieved. Similar finding was observed in hyperactivity. Stained semen samples showed a maximum percentage of incomplete AR after 1 h incubation corresponding to 50 and 75 mm/mL of PHE;however, spermatozoa treated with 75 mm/mL had a higher tendency to undergo complete AR after further incubation up to 4 h. A dose dependent relationship was detected where the maximum value of total AR was shown in spermatozoa treated with 75 mm/mL PHE for 4 h. Conclusions: To obtain better motility, hyperactivity and AR, treatment of ram spermatozoa with 75 mm/mL PHE for 4 h before being used in insemination was considered the best concentration of PHE to be used in the process ofin-vitro fertilization.

关键词： Ram sperm Capcitation Hyperactivation Acrosome reaction PHE Vf

Recombinase polymerase amplification as a promising tool in hepatitis C virus diagnosis

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World Journal of Hepatology 2014年第12期6卷 916-922页

作者： Hosam Zaghloul mahmoud el-shahat Department of Clinical Pathology Faculty of Medicine Mansoura University Mansoura Al Daqahliyah 35514-60 Egypt Zoology Department Faculty of Science Mansoura University Mansoura Al Daqahliyah 35514-60 Egypt

Hepatitis C virus(HCV)infection represents a significant health problem and represents a heavy load on some countries like Egypt in which about 20%of the total population are *** infection is usually asymptomatic and result in chronic hepatitis that give rise to complications including cirrhosis and hepatocellular *** management of HCV infection should not only be focus on therapy,but also to screen carrier individuals in order to prevent *** the present,molecular detection and quantification of HCV genome by real time polymerase chain reaction(PCR)represent the gold standard in HCV diagnosis and plays a crucial role in the management of therapeutic ***,real time PCR is a complicated approach and of limited *** the other hand,isothermal DNA amplification techniques have been developed and offer molecular diagnosis of infectious dieses at *** this review we discuss recombinase polymerase amplification technique and illustrate its diagnostic value over both PCR and other isothermal amplification techniques.

关键词： Hepatitis C virus Nucleic acid testing Polymerase chain reaction Point-of-care Recombinase polymerase amplification