Aida Ramezá Hanania, Jean Lauand,
... Literatura Árabe, fundado em 1962 pelo Prof. Dr. Helmi Nasr. Discutem-se também sete categorias do Sistema Língua- ...
Tópico(s): Hispanic-African Historical Relations
2012 - UNIVERSIDADE METODISTA DE SÃO PAULO | Educação & Linguagem
Nermin Adel El Semary, Mohamed Helmi Hadj Alouane, Olfa Nasr, Munirah F. Aldayel, Fatimah H. Alhaweti, Faheem Ahmed,
The harmful effect of salinity stress on crops needs to be mitigated. Therefore, the application of microbial inoculum in combination with nanomaterials and methyl salicylate was investigated. Initially, different seeds were exposed to salinity levels treated with variable microbial treatments using different modes of applications. The microbial treatments included application of cyanobacterial strain Cyanothece sp. and the rhizobacterium Enterobacter cloacae, alone or in combination with one another, ...
Tópico(s): Microbial Fuel Cells and Bioremediation
2020 - Multidisciplinary Digital Publishing Institute | Sustainability
Olfa Nasr, Mohamed Helmi Hadj Alouane, H. Mâaref, F. Hassen, L. Sfaxi, Bouraoui Ilahi,
In this paper, we report on the impact of InAs quantum dots' (QDs) position within InGaAs strain reducing layer on their structural and optical properties. Morphological investigation revealed that the QD' size and density are strongly dependent on the InGaAs underlying layer's thickness. Additionally, comprehensive spectroscopic study by room temperature photoreflectance spectroscopy (PR) and temperature dependent photoluminescence (PL) showed that indium segregation and strain driven alloy phase ...
Tópico(s): Advanced Semiconductor Detectors and Materials
2013 - Elsevier BV | Journal of Luminescence
Manel Souaf, M. Baïra, Olfa Nasr, Mohamed Helmi Hadj Alouane, Hassen Maaref, Larbi Sfaxi, Bouraoui Ilahi,
This work reports on theoretical and experimental investigation of the impact of InAs quantum dots (QDs) position with respect to InGaAs strain reducing layer (SRL). The investigated samples are grown by molecular beam epitaxy and characterized by photoluminescence spectroscopy (PL). The QDs optical transition energies have been calculated by solving the three dimensional Schrödinger equation using the finite element methods and taking into account the strain induced by the lattice mismatch. We have ...
Tópico(s): Semiconductor materials and devices
2015 - Multidisciplinary Digital Publishing Institute | Materials
Manal Fawzy, Mahmoud Nasr, Shacker Helmi, Heba Nagy,
Biomass of Oryza sativa (OS) was tested for the removal of Cd(II) ions from synthetic and real wastewater samples. Batch experiments were conducted to investigate the effects of operating parameters on Cd(II) biosorption. Fourier transform infrared spectroscopy, scanning electron microscopy, and energy-dispersive x-ray spectroscopy were used to examine the surface characteristics of the Cd(II)-loaded biomass. The maximum removal efficiency of Cd(II) was 89.4% at optimum pH 6.0, biosorbent dose 10. ...
Tópico(s): Adsorption and biosorption for pollutant removal
2016 - Taylor & Francis | International Journal of Phytoremediation
Abdelrahman M. Helmi, Marwa Salah Farhan, Mona Nasr,
Many decisions are made daily based on the simple mental processing. This way of decision making is suitable for the simple personal daily issues. But when decisions are concerned with general and sensitive sectors, this way of decision making is unacceptable. Nowadays, Geospatial Information Systems help in making more accurate decisions in a lot of sections that would be built on accurate information by way of drawing maps and visualizing data to clearly judge which option is the best for that ...
Tópico(s): IoT and Edge/Fog Computing
2018 - Elsevier BV | Computers & Electrical Engineering
Ashraf H. Farha, Abdullah F. Al Naim, Javed Mazher, Olfa Nasr, Mohamed Helmi Hadj Alouane,
A simple single pot sol-gel method is used to prepare ZnNiO nanoparticles at assorted Ni doping levels, 1, 3, 7 and 10 wt.%. Structural and optical properties of nanoparticles are studied by X-ray diffraction (XRD), UV-visible diffuse reflection spectroscopy (DRS), photoluminescence (PL) measurements, scanning electron microscopy (SEM), μ-Raman and X-ray photoelectron-spectroscopy (XPS). A single substitutional solid solution phase is detected in the wurtzite ZnNiO nanoparticles at various doping levels. ...
Tópico(s): Microwave Dielectric Ceramics Synthesis
2020 - Multidisciplinary Digital Publishing Institute | Materials
Manal Fawzy, Mahmoud Nasr, Heba Nagy, Shacker Helmi,
Tópico(s): Adsorption and biosorption for pollutant removal
2017 - Springer Science+Business Media | Environmental Science and Pollution Research
Dorra Ben Cherifa, Bochra Nourhène Saguem, Souad Chelbi, A. Braham, S. Ben Nasr, Helmi Ben Saad,
Assertiveness is a constructive interpersonal behavior alternative to manipulation and aggression. Medical students (MSs) have daily interpersonal interactions with colleagues, patients and families. Yet, communication deficiencies due to hesitancy to speak-up assertively lead to adverse patient outcomes. This study aimed to assess levels of assertive behaviors (ABs), and to determine its predictors within a sample of first-year Tunisian MSs. This was a cross-sectional survey including 125 first-year ...
Tópico(s): Healthcare professionals’ stress and burnout
2022 - Taylor & Francis | Libyan Journal of Medicine
Manal Fawzy, Mahmoud Nasr, Samar M. Adel, Shacker Helmi,
This study investigated the application of Potamogeton pectinatus for Ni(II)-ions biosorption from aqueous solutions. FTIR spectra showed that the functional groups of –OH, C–H, –C = O, and –COO– could form an organometallic complex with Ni(II)-ions on the biomaterial surface. SEM/EDX analysis indicated that the voids on the biosorbent surface were blocked due to Ni(II)-ions uptake via an ion exchange mechanism. For Ni(II)-ions of 50 mg/L, the adsorption efficiency recorded 63.4% at pH: 5, biosorbent ...
Tópico(s): Adsorption and biosorption for pollutant removal
2018 - Taylor & Francis | International Journal of Phytoremediation
Produção Nacional
Noomen Guelmami, Lamia Ben Ezzeddine, Ghouili Hatem, Omar Trabelsi, Helmi Ben Saad, Jordan M. Glenn, Abdelfatteh El Omri, Nasr Chalghaf, Morteza Taheri, Anissa Bouassida, Mohamed Ben Aissa, Khaled Trabelsi, Achraf Ammar, Mohamed Mansour Bouzouraa, Mouna Saidane, Özgür Eken, Cain C. T. Clark, Kamdin Parsakia, Wissem Dhahbi, Lolwa Barakat, Luis Felipe Reynoso-Sánchez, Hesham R. El‐Seedi, Laisa Liane Paineiras-Domingos, Mohamed Romdhani, Ramzi Al-Horani, Jad Adrian Washif, Sheikh Shoib, Osamah Mohammed Alyasiri, Leonardo José Mataruna-Dos-Santos, Najim Z. Alshahrani, Rodrigo Luiz Vancini, Halil İ̇brahim Ceylan, Haijiang Dai, Nicola Luigi Bragazzi, Sarya Swed, Beat Knechtle, Piotr Żmijewski, Hamdi Chtourou, Karim Chamari, Ismail Dergaa,
Objective: Research in sports medicine and exercise science has experienced significant growth over recent years. With this expansion, there has been a concomitant rise in ethical challenges specific to these disciplines. While various ethical guidelines exist for numerous scientific fields, a comprehensive set tailored specifically for sports medicine and exercise science is lacking. Aiming to bridge this gap, this paper proposes a comprehensive, updated set of ethical guidelines specifically targeted ...
Tópico(s): Doping in Sports
2024 - | International journal of Sport Studies for Health
Bouraoui Ilahi, Olfa Nasr, Bernard Paquette, Mohamed Helmi Hadj Alouane, Nicolas Chauvin, B. Salem, L. Sfaxi, C. Bru-Chevalier, Denis Morris, Richard Arès, Vincent Aimez, H. Maaref,
This paper reports on experimental and theoretical investigation of atyical temperature-dependent photoluminescence properties of InAs quantum dots in close proximity to InGaAs strain-relief underlying quantum well. The impact of a post-growth intermixing process on these properties has been studied. For the as-grown sample, the maximum of the emission band follows a sigmoidal function while the photoluminescence linewidth mimics a V-shape function as the temperature increases, from 11 to 300 K. ...
Tópico(s): Semiconductor materials and devices
2015 - Elsevier BV | Journal of Alloys and Compounds
Olfa Nasr, Nicolas Chauvin, Mohamed Helmi Hadj Alouane, H. Mâaref, C. Bru‐Chevallier, L. Sfaxi, Bouraoui Ilahi,
Tópico(s): Quantum Dots Synthesis And Properties
2017 - IOP Publishing | Journal of Optics
Olfa Nasr, Mohamed Helmi Hadj Alouane, Bouraoui Ilahi, B. Salem, L. Sfaxi, H. Maaref,
This paper reports on the evolution of InAs/GaAs quantum dots' (QDs) intermixing process depending on the QD position with respect to the InGaAs strain reducing layer.The postgrowth intermixing has been ensured by rapid thermal annealing (RTA) at different temperatures and the processed samples were investigated by photoluminescnece (PL) spectroscopie.For the reference sample containing InAs QDsin pure GaAs matrix demonstrates the highest intermixing degree with an emission energy blueshift up to 300 ...
Tópico(s): Integrated Circuits and Semiconductor Failure Analysis
2014 - Elsevier BV | Journal of Alloys and Compounds
Manal Fawzy, Mahmoud Nasr, Samar M. Adel, Heba Nagy, Shacker Helmi,
This study was carried out to examine the Typha domingensis as a biosorbent for the removal of Ni(II) and Cd(II) ions from aqueous solution, and to determine the experimental parameter that mostly influenced the biosorption process. The sorption mechanism was discussed in combination with the results obtained from Fourier-transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and energy-dispersive X-ray spectroscopy (EDX). Results revealed that, at initial metal-ions concentration: ...
Tópico(s): Adsorption and biosorption for pollutant removal
2016 - Elsevier BV | Ecological Engineering
Mohamed Helmi Hadj Alouane, Olfa Nasr, H. Khmissi, Bouraoui Ilahi, G. Patriarche, Mohamad M. Ahmad, M. Gendry, C. Bru‐Chevallier, Nicolas Chauvin,
The emergence of semiconductor nanowires (NWs) as a new class of functional materials has generated a great interest in the scientific community in the fields of electronics, photonics and energy. In this work, we report on the optical properties of telecom-band emitting InAs/InP quantum rod-nanowires (QR-NWs) grown on silicon substrates by gold catalyst assisted molecular beam epitaxy (MBE). The energies of A and B band transitions in wurtzite InAs QRs are numerically evaluated by finite element method ( ...
Tópico(s): Semiconductor Quantum Structures and Devices
2020 - Elsevier BV | Journal of Luminescence
Ao examinarmos ràpidamente os livros religiosos escritos em línguas ocidentais, reparamos logo na existência de um vácuo bem amplo e profundo devido ao seu silêncio no que diz respeito à revelação corânica .
Tópico(s): Historical and Linguistic Studies
1972 - UNIVERSIDADE DE SÃO PAULO | Revista de História
Tópico(s): Arts and Performance Studies
1978 - | Língua e Literatura
Tópico(s): Islamic Studies and History
1975 - | Língua e Literatura
Tópico(s): Language, Linguistics, Cultural Analysis
2014 - UNIVERSIDADE ESTADUAL DE MARINGÁ | Notandum
Mohamed Helmi Hadj Alouane, Faheem Ahmed, Nermin Adel El Semary, Munirah F. Aldayel, Fatimah H. Alhaweti, Olfa Nasr,
In this work, carbon-based nanomaterials including; carbon nanotubes (CNT) and graphene were combined with biofertilisers and tested their impact on germination of Hordeum vulgare . The interaction between nanomaterials and biofertilisers was analysed. Scanning electron microscopy (SEM) images revealed that the surface of algal cells was covered with carbon nanomaterials including graphene and CNTs. Raman studies showed the characteristic band of graphene, CNTs and Algal cells. The combination of carbon ...
Tópico(s): Carbon and Quantum Dots Applications
2021 - American Scientific Publishers | Science of Advanced Materials
Tamara Mary Abou-Antoun, Jad Abdallah, George Antoun Khazen, Zeina Nasr, Anthony D. Sandler,
... cancer. Citation Format: Tamara Mary Abou-Antoun, Jad Helmi Abdallah, George Antoun Khazen, Zeina Nasr, Anthony Sandler. Tumorigenic proteins upregulated in pediatric neuroblastoma ...
Tópico(s): Cancer, Hypoxia, and Metabolism
2018 - American Association for Cancer Research | Cancer Research
Ahmed Abdelaziz, Mariam Desouki, Ahmed Elshahat, Atef Hassan, Ahmed Helmi, Ahmed Mohamed, Raneem Afify, Ahmed Nasr, Ahmed Hamdy G. Ali, Sandi Banour, Basel Abdelazeem,
Introduction: For patients undergoing fibrinolytic therapy for ST-elevation myocardial infarction (STEMI), The concurrent administration of aspirin and clopidogrel as dual antiplatelet therapy is the recommended standard of care for these patients. However, the efficacy and safety of switching to ticagrelor within 24 hours following fibrinolytic treatment compared to clopidogrel continuation is still a debate. Purpose: We aimed to compare ticagrelor and clopidogrel regarding the efficacy and safety ...
Tópico(s): Antiplatelet Therapy and Cardiovascular Diseases
2024 - Lippincott Williams & Wilkins | Circulation
Ahmed Abdelaziz, Ahmed Farid Gadelmawla, Ahmed Helmi, Ahmed Diaa, Rahma AbdElfattah Ibrahim, Ahmed Mohamed, Raneem Afify, Mariam Desouki, Ahmed Nasr, Sandi Banour, Basel Abdelazeem,
Background: Spontaneous coronary artery dissection (SCAD) is defined as a separation of the coronary arterial wall caused by intramural bleeding that is neither traumatic, iatrogenic, nor atherosclerotic. It is now recognized as a significant cause of acute coronary syndrome (ACS), particularly in young women. There is conflicting information regarding the acute therapy of SCAD. We aimed to summarize the available evidence and provide a comprehensive analysis of the management of SCAD. Methods: We ...
Tópico(s): Cardiac, Anesthesia and Surgical Outcomes
2024 - Lippincott Williams & Wilkins | Circulation