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Vital Parameters Assessments of Starvation Tolerance of in vitro Populus alba Culture

Phyton-International Journal of Experimental Botany 2022年第4期91卷 889-902页

作者： Mohamed Fathy Ahmed eman Zakaria Ahmed Salman Aloufi Mohammed Alqurashi Amal Alyamani eman Fayad eman tawfik hussien Horticulture Department Faculty of AgricultureAin Shams UniversityCairo11566Egypt Botany and Microbiology Department Faculty of ScienceHelwan UniversityCairo11795Egypt Department of Biotechnology Faculty of SciencesTaif UniversityTaif21944Saudi Arabia

Populus alba is a large woody deciduous *** plant has been introduced to shooting,then multiplication of rooting on Murashige and Skoog(MS)*** work was designed to estimate the effect of two factors(low levels of 1-Naphthaleneacetic acid NAA and sucrose)on *** response resulting in 6 treatments compared to the control,with twelve measured *** was a significant difference in some measurements in morphology,like plantlets fresh-weight,shoot-,root-length,and leaf *** the physiological measurements,there were significant differences in all the measured *** low concentrations of sucrose and media composition/power(MS grams/L)led to starvation in plants;however,these conditions led to enhancement in some morphological and physiological parameters to overcome the starvation effect,compared to the *** RAPD-PCR molecular marker(four decamers)was used to evaluate the new individuals’genetic variation(instability),resulting in a total polymorphism percentage of 50.83%.It was formerly known that the plantlets were identical to each other and to the mother *** this study,however,the use of distinct media power,hormonal and sucrose levels resulted in molecular variation reflected in ***’s morphological and physiological responses.

关键词： Genetic stability Populus alba RAPD-PCR somaclonal variations starvation

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On thermodynamic self-consistency of generic axiomatic-nonextensive statistics

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Chinese Physics C 2017年第5期41卷 73-90页

作者： Abdel Nasser tawfik Hayam Yassin eman R.Abo Elyazeed Egyptian Center for Theoretical Physics (ECTP) Modern University for Technology and Information (MTI) 11571 Cairo Egypt World Laboratory for Cosmology and Particle Physics (WLCAPP) 11571 Cairo Egypt Physics Department Faculty of Women for Arts Science and Education Ain Shams University 11577 Cairo Egypt

Generic axiomatic-nonextensive statistics introduces two asymptotic properties,to each of which a scaling function is *** first and second scaling properties are characterized by the exponents c and d,*** the thermodynamic limit,a grand-canonical ensemble can be *** thermodynamic properties of a relativistic ideal gas of hadron resonances are studied,*** is found that this generic statistics satisfies the requirements of the equilibrium *** aspects of the thermodynamic self-consistency are *** expressions are proposed for the statistical fits of various transverse momentum distributions measured in most-central collisions at different collision energies and colliding *** for the freezeout temperature（T_（ch）） and the baryon chemical potential（μ_b） and the exponents c and d are *** earlier are found compatible with the parameters deduced from Boltzmann-Gibbs（BG） statistics（extensive）,while the latter refer to generic *** resulting equivalence class（c,d） is associated with stretched exponentials,where Lambert function reaches its asymptotic *** some measurements,the resulting nonextensive entropy is linearly composed on extensive *** from power-scaling,the particle ratios and yields are excellent quantities to highlighting whether the particle production takes place（non）*** particle ratios and yields measured by the STAR experiment in central collisions at 200,62.4 and 7.7 GeV are fitted with this novel *** found that both c and d 〈 1,*** to neither BG-nor Tsallis-type statistics,but to（c,d）-entropy,where Lambert functions exponentially *** freezeout temperature and baryon chemical potential are found comparable with the ones deduced from BG statistics（extensive）.We conclude that the particle production at STAR energies is likely a nonextensive process but not necessarily BG or Tsallis

关键词： thermodynamic consistency asymptotic relativistic momentum quantities exponentially collision entropy generic

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Multi-Technique Characterization and Conservation of an Ancient Egyptian Fabric from King Khufu First Solar Ship

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International Journal of Organic Chemistry 2021年第3期11卷 128-143页

作者： eman Nabil tawfik Khattab Samir Kamel Restoration laboratory Royal Chariots Museum Cairo Egypt Dyeing Printing and Auxiliaries Department National Research Centre Cairo Egypt Cellulose and Paper Department National Research Centre Cairo Egypt

Textiles are among the most fragile artefacts in the world. They are difficult to preserve even in the best circumstances. Herein, we studied an artefacts fabric of a special nature in terms of usage. Despite the multiple applications of textiles, the piece understudy is one of the unique pieces that the ancient Egyptian used as fenders for King Khufu’s first solar boat, the second-largest discovery in Egypt history. The boat was discovered inside a limestone pit. It was disassembled and arranged in several layers. Four pillows of wrapped fabric were found in the first layer, which was used as boat fenders. This use is a great discovery of the role of textiles in the manufacture of ancient boats. Thus, we conducted tests and analytical studies of those fenders using scanning electron microscopy (SEM) and an optical microscope to identify the type and nature of fibers, spinning method, and aspects of damage. Both energy-dispersive X-ray (EDX) analysis and infrared analysis (FT-IR) were employed to explore the sample’s elemental content and study the functional groups of the fabric. These analytical processes were useful in carrying out the restoration and preservation work necessary for the artefact under study.

关键词： King Khufu Solar Ship Linen Fender Analytical Methods Conservation

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Radiological Doses and Risk Assessment of NORM Scrap Metal by Using RESRAD-RECYCLE Computer Code

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Open Journal of Modelling and Simulation 2014年第2期2卷 34-42页

作者： Amaal A. tawfik eman M. Ahmed Radiation Protection Department Nuclear and Radiological Regulatory Authority Nasr City Cairo Egypt

In this work the radiological dose and risks resulting from recycling of radioactive contaminated NORM scrap metal that produced from one of oil and gas production companies in Egypt, were determined by using RESRAD-RECYCLE computer code. Two scenarios were used: the first was the workers’ scenario, while the second was end-use product scenario. Workers’ scenario was used in this study for evaluating the dose and risk to workers who process recycled materials. This scenario focused on the transport of radioactive NORM scrap metal from the place of origin to the smelter (scrap delivery step). Scenarios for six different workers were included under the scrap delivery step: two workers scrap cutter, two workers scrap loader, and two workers scrap truck driver. The values for each scenario were specified on the basis of processing 200 tons of NORM scrap metal. Because these operations occur before melting of the metal, mass and radionuclide partitioning factors were not applied in the scrap metal delivery step. The radionuclide concentration of the NORM scrap metal was used directly in the dose calculation. The maximum doses received from direct external exposure to all radio nuclides during cutter/sorter, scrap truck driver and unloading of scrap metals were 2.14E-04, 1.4E-06 and 1.86E-05 (mSv) respectively. The excess cancer risks for all radio nuclides during cutter/sorter of scrap metals reached 1.25E-07. Radiation exposures incurred by the scrap unloaders and scrap cutters/sorters were greater than those incurred by the other workers for their closer exposure distances and longer time.

关键词： NORM Scrap Metals Risk Assessment Dose Assessment RESRAD-RECYCLE Radioactive Waste

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埃及汉语学习者视域下埃中汉语教师教学特点与效果研究

埃及汉语学习者视域下埃中汉语教师教学特点与效果研究

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作者： eman HASSAN MOSTAFA hussien(安梦洁) 青岛大学

学位级别：硕士

埃及与中国都是拥有着各自文化的文明古国。随着中埃的进一步合作发展,学习汉语的埃及人也逐渐增多,教授汉语的地点也随之增多,不止大学和孔子学院。本文的调查对象为66位埃及汉语学习者,这些学习者的年龄、汉语水平、汉语学习经验及性... 详细信息

埃及与中国都是拥有着各自文化的文明古国。随着中埃的进一步合作发展,学习汉语的埃及人也逐渐增多,教授汉语的地点也随之增多,不止大学和孔子学院。本文的调查对象为66位埃及汉语学习者,这些学习者的年龄、汉语水平、汉语学习经验及性别都不同。教学是种人才培养的过程,由教师的教与学习者的学共同组成。教师和学习者在教与学的过程中产生了重要联系,而在此过程中,教师与学习者会遇到一些不可避免的问题与障碍,如:沟通困难、教材缺陷、教学方法落后、教学环境恶劣等,因此为了克服这些困难与减轻障碍,有必要对这些困难产生的原因做充分的了解。为了研究埃及汉语学习者对埃及本土汉语教师与埃及中国汉语教师的满意度和接受度,本文对埃及本土汉语教师与埃及中国汉语教师的汉语教学特点及效果进行研究,以埃及学习者为观察研究对象,通过问卷,调查埃及汉语学习者对埃及本土汉语教师和埃及中国汉语教师的教学特点并做出学习反馈和建议。问卷调查显示埃及本土汉语教师和埃及中国汉语教师对埃及汉语学习者均十分重要,且优缺点鲜明。虽然调查问卷显示埃、中两国教师的教学是有效的,但是也同时揭示了两国教师的不足之处与学习者的困难和需求等。其中包括:学习者与教师沟通困难的问题、缺乏练习汉语机会的问题、教师的严厉造成学习者产生距离感的问题、教师无法因材施教的问题等。同时,问卷调查结果还显示埃及汉语学习者对埃及本土汉语教师和中国汉语教师的满意度较高,也显示出埃、中两国教师对埃及汉语学习者存在的重要性与学习者对两国教师的需求。因此,本研究致力于更加深入地了解埃及汉语学习者在学习汉语的过程中所面临的困难及其产生的原因。通过对埃及学习者给两国教师建议的梳理,总结埃及汉语学习者对两国教师提出来的学习反馈与教学建议,能够把握埃及汉语学习者学习汉语的难点和更适合埃及学习者的汉语教学方法,帮助埃、中两国教师和埃及学习者探索出汉语学习的更加有效果的学和教的汉语环境,帮助埃及汉语学习者更好地把握汉语,达到学习汉语目标,也帮助埃中两国教师提高教学质量,提升教学效果。

关键词：埃及汉语学习者埃及本土汉语教师埃及中国汉语教师教学特点教学效果

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Comparison of serum cardiac troponin-Ⅰ and creatine kinase MB isoenzyme concentrations in asphyxiated neonates

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海南医学院学报 2009年第1期15卷 31-36页

作者： Nouran F. hussien eman A. Abdel Ghany Amany E.Elwan Yasser H.Kamel Dina K.Ali Pediatric Department Neonatology DepartmentCairo University Hospitals

Objective:To assess the correlation of signs of myocardial damage to serum cardiac troponin I(cTnI)and creatine kinase MB isoenzyme(CK-MB)***:Blood samples were collected from 25 term asphyxiated neonates and 25 controls at 12 h of age by *** asphyxiated neonates were followed up until discharge or ***:Asphyxiated neonates had significantly higher concentrations of cTnI and CK-MB than controls(P<0.001).Serum cTnI concentrations were significantly higher in asphyxiated neonates who developed hypotension,heart failure or those had low ejection fraction(P<0.01).Serum cTnI concentrations were significantly higher in asphyxiated who died than those who survived(P<0.01).There was no significant difference in serum CK-MB mass concentrations between asphyxiated neonates with and without these ***:Unlike CK-MB,serum cTnI concentrations are significantly higher in asphyxiated neonates who died or developed cardiac dysfunction.

关键词：肌钙蛋白肌酸激酶围产期心脏水肿

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